A hole error detection tool
By designing a hole error detection fixture, and utilizing snap-fit components and a magnetic adsorption structure, the problem of rapid and accurate detection of deep holes was solved, achieving simple operation and efficient detection, and adapting to the detection needs of various hole shapes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI HAOJIE MACHINERIES MFG CO LTD
- Filing Date
- 2025-09-26
- Publication Date
- 2026-07-07
AI Technical Summary
In existing technologies, it is difficult to quickly, accurately and economically detect the inner diameter and internal shape of deep holes. Conventional tools and equipment are costly and complex to operate, and are not suitable for rapid detection on the production site.
A hole error detection fixture was designed, including a cylindrical fixture, a detection column, a detection head, and a snap-fit assembly. The snap-fit assembly enables convenient assembly and disassembly of the detection column and the cylindrical fixture, and ensures high stability. Combined with magnetic adsorption and anti-slip structure, it can adapt to the detection needs of holes of different shapes.
It enables rapid and accurate detection of the inner diameter and internal shape of deep holes. It has a simple structure, is easy to operate, adapts to the detection needs of different holes, and does not require additional tools, thus improving detection efficiency and stability.
Smart Images
Figure CN224470962U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hole detection technology, specifically a hole error detection tooling. Background Technology
[0002] In machining, it is often necessary to machine various holes in workpieces for the assembly of other components. The machined holes need to be inspected for their inner diameter and internal shape to ensure that the machining accuracy meets requirements.
[0003] For holes with greater depth, conventional internal diameter measuring tools such as calipers and inside micrometers are difficult to penetrate deep into the hole for accurate measurement.
[0004] Existing technologies typically employ optical or ultrasonic testing equipment, but these devices are costly and complex to operate, making them unsuitable for rapid on-site testing. To address these issues, a hole error detection fixture is proposed. Utility Model Content
[0005] To address the shortcomings of existing technologies, this application provides a hole error detection fixture with a simple structure and convenient operation, which can quickly detect whether the inner diameter and internal shape of deep holes meet the processing requirements.
[0006] To achieve the above objectives, this application provides the following technical solution: a hole error detection fixture, comprising a cylindrical fixture, a detection column, a detection head, and a snap-fit assembly. The snap-fit assembly includes an I-shaped guide strip fixedly connected to the bottom end of the detection column. One end of the I-shaped guide strip has two positioning holes. The inner wall of the cylindrical fixture has an I-shaped guide groove adapted to the I-shaped guide strip. The I-shaped guide strip is slidably sleeved on the inner wall of the I-shaped guide groove. A circular bottom cover is fixedly connected to the bottom of the cylindrical fixture. Two symmetrical positioning posts are slidably sleeved on the inner wall of the circular bottom cover. The diameter of the positioning posts is the same as the inner diameter of the positioning holes. A connecting piece is fixedly connected to the ends of the two positioning posts that are far apart from each other. A telescopic spring is fixedly connected to the sides of the two connecting pieces that are close to each other. The ends of the two telescopic springs that are close to each other are fixedly connected to the outer surface of the circular bottom cover.
[0007] The above solution utilizes a snap-fit assembly to achieve convenient assembly and disassembly with high stability between the cylindrical fixture and the inspection column. The sliding fit between the I-shaped guide strip and the I-shaped guide groove in the snap-fit assembly, combined with the precise insertion of the positioning hole and the positioning column, enables rapid installation and separation of the inspection column and the cylindrical fixture without the need for additional tools. This allows for easy replacement of the inspection column as needed. Furthermore, different inspection columns can have different inspection heads at their tips, accommodating inspection requirements for holes of various shapes. During inspection, the inspection column and inspection head are inserted into the hole. If they fit perfectly, it indicates that the internal structure of the hole meets the processing requirements; otherwise, it indicates a processing error. This achieves rapid inspection with a simple and practical structure.
[0008] Furthermore, the detection head is positioned at the top of the detection column, and the cylindrical tooling and the detection column are connected by a snap-fit assembly.
[0009] The above scheme defines the relationship between the cylindrical tooling, the detection column, the detection head, and the snap-fit assembly, allowing for easy assembly and disassembly of the cylindrical tooling and the detection column via the snap-fit assembly.
[0010] Furthermore, an anti-slip sleeve is fixedly connected to the outer surface of the cylindrical tooling, and the outer surface of the anti-slip sleeve is provided with uniformly distributed anti-slip grooves.
[0011] The above solution increases the friction on the surface of the cylindrical tooling by using anti-slip sleeves and anti-slip grooves, allowing workers to hold the tooling more stably to inspect hole errors.
[0012] Furthermore, the two telescopic springs are respectively sleeved on the outside of the two positioning posts, and both telescopic springs are located outside the circular bottom cover.
[0013] The above scheme defines the positional relationship of the telescopic springs. When the telescopic springs deform, they can generate elastic force, which can facilitate the resetting of the positioning post and is beneficial for the rapid assembly and disassembly of the detection post.
[0014] Furthermore, the bottom of the cylindrical tooling is fixedly connected to two anti-slip rubber pads, and the thickness of the two anti-slip rubber pads is the same as the thickness of the circular bottom cover.
[0015] The above solution improves the friction of the bottom surface of the cylindrical tool by using anti-slip rubber pads, thus enabling the tool to be placed stably and vertically on the table.
[0016] Furthermore, a first annular magnet is embedded in the top of the cylindrical tooling, and a second annular magnet is embedded in one end of the detection column, wherein the first annular magnet and the second annular magnet are compatible.
[0017] The above scheme uses a first and a second annular magnet to magnetically attract the cylindrical tooling and the detection column at their connection, thereby improving the stability of the connection between the cylindrical tooling and the detection column.
[0018] Furthermore, a second circular magnet is fixedly connected to the inner wall of the circular bottom cover, and a first circular magnet is embedded in the bottom of the I-shaped guide strip, with the first circular magnet and the second circular magnet being compatible.
[0019] The above scheme, through the cooperation of the first and second circular magnets, enables the I-shaped guide strip to be magnetically attracted inside the circular bottom cover, further improving the stability of the connection between the cylindrical tooling and the detection column.
[0020] Furthermore, a lever is fixedly connected to the outer surface of each of the connecting pieces.
[0021] The above scheme increases the contact area of the outer surface of the connecting piece by setting the paddle, which facilitates the pulling of the connecting piece and the adjustment of the position of the positioning post, thus facilitating the disassembly and assembly of the detection post.
[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0023] This hole error detection fixture features a snap-fit assembly that allows for easy assembly and disassembly of the cylindrical fixture and the detection post while maintaining high stability. The snap-fit assembly utilizes a sliding fit between an I-shaped guide strip and an I-shaped guide groove, combined with the precise insertion of the positioning hole and the positioning post, enabling rapid installation and separation of the detection post and the cylindrical fixture without the need for additional tools. This allows for easy replacement of the detection post as needed. Furthermore, different detection posts can have different detection heads at their tips, accommodating the detection requirements of holes of various shapes. During detection, the detection post and detection head are inserted into the hole. If they fit perfectly, the internal structure of the hole meets the processing requirements; otherwise, processing errors exist. This achieves rapid detection with a simple and practical structure. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall front view of the structure of this application;
[0025] Figure 2 This is a schematic diagram of the first overall exploded structure of the present application.
[0026] Figure 3 This is a schematic diagram of the second integral exploded structure of the present application.
[0027] Figure 4 This is a schematic diagram of the detection column structure of this application;
[0028] Figure 5 This is a partial cross-sectional view of the structure of this application.
[0029] In the picture:
[0030] 1. Cylindrical fixture; 2. Inspection column; 3. Inspection head; 4. Snap-fit assembly; 401. I-shaped guide strip; 402. Positioning hole; 403. I-shaped guide groove; 404. Circular bottom cover; 405. Positioning column; 406. Connecting piece; 407. Telescopic spring; 408. Paddle; 409. First annular magnet; 410. Second annular magnet; 411. First circular magnet; 412. Second circular magnet; 5. Anti-slip sleeve; 6. Anti-slip groove; 7. Anti-slip pad. Detailed Implementation
[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0032] Please see Figure 1 , Figure 2 and Figure 3 This embodiment of a hole error detection fixture includes a cylindrical fixture 1, a detection column 2, a detection head 3, and a snap-fit assembly 4. The detection head 3 is located at the top of the detection column 2. The cylindrical fixture 1 and the detection column 2 are connected by the snap-fit assembly 4, which defines the relationship between the cylindrical fixture 1, the detection column 2, the detection head 3, and the snap-fit assembly 4, allowing for easy assembly and disassembly of the cylindrical fixture 1 and the detection column 2. An anti-slip sleeve 5 is fixedly connected to the outer surface of the cylindrical fixture 1. The outer surface of the anti-slip sleeve 5 has evenly distributed anti-slip grooves 6. The anti-slip sleeve 5 and the anti-slip grooves 6 increase the friction of the cylindrical fixture 1, allowing the operator to hold the fixture more stably to detect hole errors.
[0033] Please see Figure 2 , Figure 3 and Figure 5The snap-fit assembly 4 includes an I-shaped guide strip 401 fixedly connected to the bottom end of the detection column 2. Two positioning holes 402 are provided at one end of the I-shaped guide strip 401, facilitating subsequent positioning of the I-shaped guide strip 401. An I-shaped guide groove 403, adapted to the I-shaped guide strip 401, is provided on the inner wall of the cylindrical fixture 1. The I-shaped guide strip 401 slides within the inner wall of the I-shaped guide groove 403, facilitating the snap-fit between the cylindrical fixture 1 and the detection column 2. A circular bottom cover 404 is fixedly connected to the bottom of the cylindrical fixture 1. Two symmetrical positioning posts 405 are slidably fitted onto the inner wall of the circular bottom cover 404. The diameter of the positioning pin 405 is the same as the inner diameter of the positioning hole 402. When the positioning pin 405 is inserted into the positioning hole 402, it can position the I-shaped guide strip 401, thereby enabling the snap-fit between the cylindrical tool 1 and the detection pin 2. When the positioning pin 405 is removed from the positioning hole 402, it can release the limiting work of the I-shaped guide strip 401, thereby facilitating the quick assembly and disassembly of the detection pin 2. The ends of the two positioning pins 405 that are far apart from each other are fixedly connected to the connecting pieces 406. The sides of the two connecting pieces 406 that are close to each other are fixedly connected to the telescopic springs 407. The ends of the two telescopic springs 407 that are close to each other are fixedly connected to the outer surface of the circular bottom cover 404.
[0034] Please see Figure 2 , Figure 3 and Figure 5 Two telescopic springs 407 are respectively sleeved on the outside of the two positioning posts 405, and both telescopic springs 407 are located outside the circular bottom cover 404, which limits the positional relationship of the telescopic springs 407. When the telescopic springs 407 deform, they can generate elastic force, which can facilitate the reset of the positioning posts 405 and facilitate the quick disassembly and assembly of the detection posts 2. Each connecting piece 406 has a fixedly connected paddle 408 on its outer surface. The paddle 408 can increase the contact area of the outer surface of the connecting piece 406, thereby facilitating the pulling of the connecting piece 406 and facilitating the adjustment of the position of the positioning post 405, which can facilitate the disassembly and assembly of the detection posts 2.
[0035] Please see Figure 2 , Figure 4 and Figure 5Two anti-slip rubber pads 7 are fixedly connected to the bottom of the cylindrical fixture 1. The thickness of the two anti-slip rubber pads 7 is the same as the thickness of the circular bottom cover 404. The anti-slip rubber pads 7 can improve the friction of the bottom surface of the cylindrical fixture 1, so that the fixture can be stably placed vertically on the table. A first annular magnet 409 is embedded in the top of the cylindrical fixture 1, and a second annular magnet 410 is embedded in one end of the detection column 2. The first annular magnet 409 and the second annular magnet 410 are compatible. The first annular magnet 409 and the second annular magnet 410 can make the cylindrical fixture stable. The cylindrical tooling 1 and the detection column 2 are magnetically attracted together, thereby improving the stability of the connection between the cylindrical tooling 1 and the detection column 2. A second circular magnet 412 is fixedly connected to the inner wall of the circular bottom cover 404. A first circular magnet 411 is embedded in the bottom of the I-shaped guide strip 401. The first circular magnet 411 and the second circular magnet 412 are adapted to each other. By setting the first circular magnet 411 and the second circular magnet 412 to cooperate with each other, the I-shaped guide strip 401 can be magnetically attracted to the inside of the circular bottom cover 404, which further improves the stability of the connection between the cylindrical tooling 1 and the detection column 2.
[0036] It should be noted that different detection columns 2 need to be used when performing error detection on different holes. The lengths and dimensions of the different detection columns 2 are different, and the detection heads 3 opened on the top of the detection columns 2 are also different. However, the outer diameter of the detection column 2 is adapted to the inner diameter of the hole to be tested, and the shape and size of the detection head 3 are the same as those of the bottom wall of the hole to be tested. In addition, the other components on each detection column 2 are standardized parts. This allows for easy replacement and quick disassembly and assembly of the detection columns 2 to meet the detection requirements of different holes.
[0037] In this embodiment, the snap-fit component 4 enables convenient assembly and disassembly of the cylindrical fixture 1 and the detection column 2, while maintaining high stability. The sliding engagement of the I-shaped guide strip 401 and the I-shaped guide groove 403 in the snap-fit component 4, combined with the precise insertion of the positioning hole 402 and the positioning column 405, allows for the rapid installation and separation of the detection column 2 and the cylindrical fixture 1 without the need for additional tools. This allows the detection column 2 to be replaced as needed. Furthermore, different detection columns 2 can have different detection heads 3 at their tops, thus adapting to the detection requirements of holes of different shapes. During detection, the detection column 2 and the detection head 3 are inserted into the hole. If the detection column 2 and the detection head 3 fit perfectly, it indicates that the internal structure of the hole meets the processing requirements; otherwise, it indicates a processing error. This achieves rapid detection, and the structure is simple and practical.
[0038] The working principle of the above embodiment is as follows: During testing, the operator holds the anti-slip groove 6 on the surface of the anti-slip sleeve 5 and vertically inserts the detection column 2 and detection head 3 into the hole to be tested. If the detection column 2 and detection head 3 can fit in perfectly, it indicates that the internal structure of the hole meets the processing requirements; otherwise, it indicates that there is a processing error. This achieves the effect of rapid testing, and the structure is simple and practical. If different holes need to be tested, the corresponding detection column 2 needs to be replaced. At this time, the two connecting pieces 406 can be pulled outward to move the two positioning columns 405 out of the corresponding positioning holes 402, thereby releasing the limiting effect on the I-shaped guide strip 401. Then, the detection column 2 can be removed from the cylindrical fixture 1, and the I-shaped guide strip 401 at the bottom of the other detection column 2 slides along the I-shaped guide groove 403 on the inner wall of the cylindrical fixture 1. When the positioning hole 402 at the bottom of strip 401 moves to the area of the circular bottom cover 404, the two connecting pieces 406 are pulled outwards. The positioning posts 405 on both sides move outwards under the elastic force of the telescopic spring 407. Then, the I-shaped guide strip 401 is fully inserted into the I-shaped guide groove 403 so that the cylindrical tooling 1 and the detection post 2 come into contact. At this time, the first ring magnet 409 and the second ring magnet 410 attract each other, and the first circular magnet 411 and the second circular magnet 412 cooperate. The connection stability is enhanced by the double magnetic attraction structure. Then, the two connecting pieces 406 are released. With the help of the elastic force generated by the deformation of the telescopic spring 407, the two positioning posts 405 are sprung into the corresponding positioning holes 402 respectively, realizing the positioning effect of the I-shaped guide strip 401. In this way, the detection post 2 can be quickly replaced to meet the detection needs of different holes.
[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0040] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A hole error detection fixture, comprising a cylindrical fixture (1), a detection column (2), a detection head (3), and a snap-fit assembly (4), characterized in that: The snap-fit assembly (4) includes an I-shaped guide strip (401) fixedly connected to the bottom end of the detection column (2). Two positioning holes (402) are provided at one end of the I-shaped guide strip (401). An I-shaped guide groove (403) adapted to the I-shaped guide strip (401) is provided on the inner wall of the cylindrical fixture (1). The I-shaped guide strip (401) is slidably fitted onto the inner wall of the I-shaped guide groove (403). A circular bottom cover (404) is fixedly connected to the bottom of the cylindrical fixture (1). The inner wall of the circular bottom cover (404) is slidably fitted with two symmetrical positioning posts (405). The diameter of the positioning posts (405) is the same as the inner diameter of the positioning hole (402). The ends of the two positioning posts (405) that are far apart from each other are fixedly connected with connecting pieces (406). The sides of the two connecting pieces (406) that are close to each other are fixedly connected with telescopic springs (407). The ends of the two telescopic springs (407) that are close to each other are fixedly connected to the outer surface of the circular bottom cover (404).
2. The hole error detection fixture according to claim 1, characterized in that: The detection head (3) is located at the top of the detection column (2), and the cylindrical tooling (1) and the detection column (2) are connected by a snap-fit assembly (4).
3. The hole error detection fixture according to claim 1, characterized in that: The outer surface of the cylindrical tooling (1) is fixedly connected to an anti-slip sleeve (5), and the outer surface of the anti-slip sleeve (5) is provided with uniformly distributed anti-slip grooves (6).
4. The hole error detection fixture according to claim 1, characterized in that: The two telescopic springs (407) are respectively sleeved on the outside of the two positioning posts (405), and both of the telescopic springs (407) are located outside the circular bottom cover (404).
5. The hole error detection fixture according to claim 1, characterized in that: The bottom of the cylindrical tooling (1) is fixedly connected to two anti-slip rubber pads (7), and the thickness of the two anti-slip rubber pads (7) is the same as the thickness of the circular bottom cover (404).
6. The hole error detection fixture according to claim 1, characterized in that: The top of the cylindrical tooling (1) is inlaid with a first annular magnet (409), and one end of the detection column (2) is inlaid with a second annular magnet (410). The first annular magnet (409) and the second annular magnet (410) are compatible.
7. The hole error detection fixture according to claim 1, characterized in that: The inner wall of the circular bottom cover (404) is fixedly connected to a second circular magnet (412), and the bottom of the I-shaped guide strip (401) is inlaid with a first circular magnet (411), and the first circular magnet (411) is compatible with the second circular magnet (412).
8. The hole error detection fixture according to claim 1, characterized in that: Each of the connecting pieces (406) has a paddle (408) fixedly connected to its outer surface.