Go / No-Go Gauge Device

Abstract

This utility model belongs to the field of irregular hole inspection technology and discloses a go / no-go gauge device. The device includes a go gauge and a no-go gauge assembly. The no-go gauge assembly includes a major axis no-go gauge and a minor axis no-go gauge. A cylindrical body with a cross-sectional shape matching the shape of an oblong hole is used as the go gauge. The outer circumferential dimensions of the go gauge match the minimum acceptable size of the oblong hole. First, the go gauge is used to inspect the minimum size and shape of the oblong hole, and the working length of the go gauge is greater than the length of the oblong hole to reduce the risk of misjudgment. Then, the major axis no-go gauge and the minor axis no-go gauge are used to inspect the major axis inner diameter and the minor axis inner diameter of the oblong hole, respectively. The major axis no-go gauge and the minor axis no-go gauge are designed with a working length shorter than that of the go gauge to avoid interference from shape errors. If the go gauge can pass completely through the oblong hole, and neither the major axis no-go gauge nor the minor axis no-go gauge can pass through, then the oblong hole is considered acceptable. This go / no-go gauge device can quickly and reliably make a comprehensive judgment on the major axis inner diameter, minor axis inner diameter, and shape of an oblong hole.

Description

Technical Field

[0001] This utility model relates to the field of irregular hole detection technology, and in particular to a go / no-go gauge device. Background Technology

[0002] In the field of precision manufacturing, the inspection of the inner hole of irregularly shaped pipes (such as oblong holes) is usually carried out using conventional measuring tools or coordinate measuring machines (CMMs). While conventional measuring tools (such as calipers and plug gauges) are simple to operate, they suffer from low efficiency, large human error, and difficulty in batch inspection. Using a CMM is expensive, has stringent environmental requirements, is slow, and is suitable for sampling inspection; however, it is prone to jamming during the inspection process due to shape mismatch. Traditional universal go / no-go gauges are mainly designed for circular cross-sections and are not applicable to oblong holes.

[0003] Therefore, there is an urgent need to provide a go / no-go gauge device that can balance the detection accuracy and efficiency of oblong holes, and can quickly and reliably make a comprehensive judgment on the inner diameter of the major axis, the inner diameter of the minor axis, and the shape of oblong holes. Utility Model Content

[0004] The purpose of this utility model is to provide a go / no-go gauge device that balances the detection accuracy and efficiency of oblong holes, and can quickly and reliably make a comprehensive judgment on the inner diameter of the major axis, the inner diameter of the minor axis, and the shape of oblong holes.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model provides a go / no-go gauge device for detecting elongated holes, comprising:

[0007] A GO gauge, wherein the GO gauge is a cylinder and its cross-sectional shape matches the shape of the elongated hole, and the outer circumferential dimensions of the GO gauge match the minimum acceptable size of the elongated hole;

[0008] A stop-go gauge assembly includes a long-axis stop-go gauge and a short-axis stop-go gauge. The working length of the go gauge is greater than the length of the oblong hole. The working lengths of both the long-axis and short-axis stop-go gauges are less than the working length of the go gauge. The long-axis dimension of the cross-section of the long-axis stop-go gauge is equal to the maximum value of the long-axis of the oblong hole. The short-axis dimension of the cross-section of the long-axis stop-go gauge is less than the minimum value of the short-axis of the oblong hole. The short-axis dimension of the cross-section of the short-axis stop-go gauge is equal to the maximum value of the short-axis of the oblong hole. The long-axis dimension of the cross-section of the short-axis stop-go gauge is less than the minimum value of the long-axis of the oblong hole.

[0009] As an optional technical solution for a go / no-go gauge device, the long-axis no-go gauge has side planes on both sides of its short axis, and the distance between the two side planes is the short axis dimension of the long-axis no-go gauge.

[0010] As an optional technical solution for a go / no-go gauge device, the short-axis no-go gauge has a tapered surface on both sides of its long axis, and the maximum distance between the two tapered surfaces is the long axis dimension of the short-axis no-go gauge cross section.

[0011] As an optional technical solution for a go / no-go gauge device, the no-go gauge assembly further includes a connecting structure, which has a main handle and two branch sections. The ends of the two branch sections are connected to the main handle, and the front ends of the branch sections are connected to the long axis no-go gauge or the short axis no-go gauge.

[0012] As an optional technical solution for a go / no-go gauge device, the two branch sections are arranged side by side at intervals on one side of the main handle, and the axes of the long axis no-go gauge and the short axis no-go gauge are parallel.

[0013] As an optional technical solution for a go / no-go gauge device, both the long axis no-go gauge and the short axis no-go gauge are detachably connected to the branch section.

[0014] As an optional technical solution for a go / no-go gauge device, the long shaft no-go gauge is provided with a threaded hole that mates with the thread of the first branch section, and the short shaft no-go gauge is provided with a threaded post that mates with the thread of the second branch section.

[0015] As an optional technical solution for a go / no-go gauge device, the long shaft no-go gauge is provided with a threaded hole, and the short shaft no-go gauge is provided with a threaded post that mates with the threaded hole.

[0016] As an optional technical solution for a go / no-go gauge device, both ends of the go gauge are provided with guide surfaces, which are conical surfaces or circular arc transition surfaces.

[0017] As an optional technical solution for a go / no-go gauge device, the go gauge is provided with a go gauge positioning mark for axial alignment with the elongated hole;

[0018] And / or, both the long axis stop gauge and the short axis stop gauge are provided with stop gauge positioning marks for axial alignment with the elongated hole.

[0019] Beneficial effects:

[0020] This utility model provides a go / no-go gauge device, which includes a go gauge and a no-go gauge assembly. The go gauge is a cylinder with a cross-sectional shape that matches the shape of an oblong hole, and the outer circumferential dimensions of the go gauge match the minimum acceptable dimensions of the oblong hole. The no-go gauge assembly includes a long-axis no-go gauge and a short-axis no-go gauge. The working length of the go gauge is greater than the length of the oblong hole, and the working lengths of both the long-axis and short-axis no-go gauges are less than the working length of the go gauge. The long-axis dimension of the long-axis no-go gauge cross-section is equal to the maximum value of the long-axis dimension of the oblong hole, and the short-axis dimension of the long-axis no-go gauge cross-section is less than the minimum value of the short-axis dimension of the oblong hole. The short-axis dimension of the short-axis no-go gauge cross-section is equal to the maximum value of the short-axis dimension of the oblong hole, and the long-axis dimension of the short-axis no-go gauge cross-section is less than the minimum value of the long-axis dimension of the oblong hole. A cylindrical gauge with a cross-sectional shape matching the shape of the oblong hole is used as the GO gauge. The outer circumferential dimensions of the GO gauge match the minimum acceptable size of the oblong hole. First, the GO gauge is used to inspect the minimum size and shape of the oblong hole, and the working length of the GO gauge is greater than the length of the oblong hole to reduce the risk of misjudgment. Then, a major axis stop gauge and a minor axis stop gauge are used to inspect the major axis inner diameter and minor axis inner diameter of the oblong hole, respectively. The major axis stop gauge and the minor axis stop gauge are designed with a working length shorter than that of the GO gauge to avoid shape errors interfering with the inspection of the maximum size of the oblong hole. The cross-sectional dimensions of the major axis stop gauge... The short axis dimension is designed to be smaller than the minimum value of the short axis of the oblong hole to avoid interference with the detection of the long axis. Similarly, the long axis dimension of the short axis no-go gauge section is designed to be smaller than the minimum value of the long axis of the oblong hole to avoid interference with the detection of the short axis. If the go gauge can pass completely through the oblong hole, and neither the long axis no-go gauge nor the short axis no-go gauge can pass through, then the oblong hole is qualified. This go / no-go gauge device can take into account both the detection accuracy and detection efficiency of the oblong hole, and can quickly and reliably make a comprehensive judgment on the inner diameter of the long axis, the inner diameter of the short axis, and the shape of the oblong hole. Attached Figure Description

[0021] Figure 1 This is a cross-sectional schematic diagram of the elongated tube provided in Embodiment 1 of this utility model;

[0022] Figure 2 This is a structural schematic diagram of the first perspective of the general gauge provided in Embodiment 1 of this utility model;

[0023] Figure 3 This is a structural schematic diagram of the general gauge from the second perspective provided in Embodiment 1 of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the stop gauge assembly provided in Embodiment 1 of this utility model;

[0025] Figure 5 This is a structural schematic diagram of the long axis stop gauge provided in Embodiment 1 of this utility model from a first-view perspective;

[0026] Figure 6 This is a structural schematic diagram of the long axis stop gauge from the second perspective provided in Embodiment 1 of this utility model;

[0027] Figure 7 This is a structural schematic diagram of the long axis stop gauge from a third perspective provided in Embodiment 1 of this utility model;

[0028] Figure 8 This is a structural schematic diagram of the short axis stop gauge provided in Embodiment 1 of this utility model from a first-view perspective;

[0029] Figure 9 This is a structural schematic diagram of the short axis stop gauge from the second perspective provided in Embodiment 1 of this utility model;

[0030] Figure 10 This is a structural schematic diagram of the short axis stop gauge provided in Embodiment 1 of this utility model from a third-view perspective;

[0031] Figure 11 This is an exploded view of the stop gauge component provided in Embodiment 1 of this utility model;

[0032] Figure 12 This is a cross-sectional view of the stop gauge component provided in Embodiment 1 of this utility model;

[0033] Figure 13 This is a schematic diagram of the structure of the stop gauge assembly provided in Embodiment 2 of this utility model;

[0034] Figure 14 This is an exploded view of the stop gauge component provided in Embodiment 2 of this utility model.

[0035] In the picture:

[0036] 1. Oblong tube; 1a. Oblong hole;

[0037] 10. Circular design; 11. Guiding surface;

[0038] 20. No-go gauge assembly; 21. Long shaft no-go gauge; 21a. Threaded hole; 211. Side plane; 22. Short shaft no-go gauge; 22a. Threaded post; 221. Constricted arc surface; 23. Connection structure; 231. Main handle; 232. Branch section. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] Example 1

[0044] like Figure 1 As shown, the cross-section of the elongated tube 1 consists of two semicircular arcs and two parallel straight edges. The largest diameter A of the cross-section of the elongated tube 1 is the major axis dimension of the elongated tube 1, and the smallest diameter B of the cross-section of the elongated tube 1 is the minor axis dimension of the elongated tube 1. The elongated tube 1 has an elongated hole 1a.

[0045] See Figure 2 and Figure 3 This embodiment provides a go / no-go gauge device for detecting an elongated hole 1a. The device includes a go gauge 10, which is a cylinder with a cross-sectional shape matching the shape of the elongated hole 1a. The outer circumferential dimensions of the go gauge 10 match the minimum acceptable size of the elongated hole 1a, and the working length of the go gauge 10 is greater than the length of the elongated hole 1a. In this embodiment, the major axis dimension of the go gauge 10 cross-section is A1, and the minor axis dimension is B1. A1 is selected as the minimum value of the major axis of the elongated hole 1a, and B1 is selected as the minimum value of the minor axis of the elongated hole 1a.

[0046] A column with a cross-sectional shape matching the shape of the oblong hole 1a is used as a go gauge 10. The outer circumferential dimensions of the go gauge 10 match the minimum acceptable size of the oblong hole 1a. First, the minimum size and shape of the oblong hole 1a are checked using the go gauge 10. If the go gauge 10 can completely pass through the oblong hole 1a, it means that the actual size of the oblong hole 1a exceeds the minimum acceptable size.

[0047] See Figures 4 to 7 The go / no-go gauge device also includes a no-go gauge assembly 20, which includes a long-axis no-go gauge 21. The working length of the long-axis no-go gauge 21 is less than the working length of the go gauge 10. The long-axis dimension of the cross-section of the long-axis no-go gauge 21 is equal to the maximum value of the long axis of the oblong hole 1a, and the short-axis dimension of the cross-section of the long-axis no-go gauge 21 is less than the minimum value of the short axis of the oblong hole 1a. In this embodiment, the long-axis dimension of the cross-section of the long-axis no-go gauge 21 is A2, and the short-axis dimension of the cross-section of the long-axis no-go gauge 21 is B2. A2 is selected as the maximum value of the long axis of the oblong hole 1a, and B2 is less than the minimum value of the short axis of the oblong hole 1a.

[0048] See Figures 8 to 10 The stop gauge assembly 20 also includes a short-axis stop gauge 22. The working length of the short-axis stop gauge 22 is less than the working length of the go gauge 10. The short-axis dimension of the cross-section of the short-axis stop gauge 22 is equal to the maximum value of the short axis of the oblong hole 1a, and the long-axis dimension of the cross-section of the short-axis stop gauge 22 is less than the minimum value of the long axis of the oblong hole 1a. In this embodiment, the long-axis dimension of the cross-section of the short-axis stop gauge 22 is A3, the short-axis dimension of the cross-section of the short-axis stop gauge 22 is B3, A3 is less than the minimum value of the long axis of the oblong hole 1a, and B3 is selected as the maximum value of the short axis of the oblong hole 1a.

[0049] After the GO gauge 10 is used for inspection, the long axis no-go gauge 21 and the short axis no-go gauge 22 are used to inspect the long axis inner diameter and the short axis inner diameter of the oblong hole 1a, respectively. If the GO gauge 10 can pass through the oblong hole 1a completely, and the long axis no-go gauge 21 and the short axis no-go gauge 22 cannot pass through, then the oblong hole 1a is qualified.

[0050] The limit dimension judgment logic of "go gauge passes, no-go gauge does not pass" means that the go gauge 10 simulates the minimum limit dimension of the elongated hole 1a. The go gauge 10 must be able to pass smoothly through the elongated hole 1a, indicating that the actual dimension is not lower than the lower limit. The long axis no-go gauge 21 simulates the maximum limit dimension of the long axis, and the short axis no-go gauge 22 simulates the maximum limit dimension of the short axis. The long axis no-go gauge 21 and the short axis no-go gauge 22 must not pass through the workpiece, indicating that the actual dimension does not exceed the upper limit.

[0051] Inspection is performed using a go gauge 10, a major axis no-go gauge 21, and a minor axis no-go gauge 22. The cross-sectional design of all three gauges strictly adheres to the geometric proportions of a qualified elongated hole 1a, allowing for simultaneous verification of the shape of the elongated hole 1a while inspecting its dimensions. If the elongated hole 1a is deformed (e.g., bulges or flattening), even if a single shaft diameter dimension is qualified, the go gauge 10 will not pass through, or the corresponding no-go gauge will be inserted abnormally. This allows for a comprehensive judgment of the shape tolerance of the elongated hole 1a.

[0052] This go / no-go gauge device can intuitively inspect the elongated hole 1a. Compared with conventional measuring tools (such as calipers and plug gauges), the go / no-go gauge device has higher inspection efficiency and eliminates human error due to the lack of readings. Compared with a coordinate measuring machine, the go / no-go gauge device has a simple structure, low cost, low requirements for the operating environment, and is more intuitive and faster in inspection, without the risk of jamming. The go / no-go gauge device balances inspection accuracy and efficiency, and can quickly and reliably determine the major axis inner diameter, minor axis inner diameter, and shape of the elongated hole 1a.

[0053] In this embodiment, the working length of the go gauge 10 is designed to be greater than the length of the oblong hole 1a, which helps to reduce the risk of misjudgment. The working lengths of the long axis stop gauge 21 and the short axis stop gauge 22 are designed to be shorter than the working length of the go gauge 10, which can avoid the shape error from interfering with the inspection of the maximum size of the oblong hole 1a. The short axis dimension of the long axis stop gauge 21 is designed to be smaller than the minimum value of the short axis of the oblong hole 1a, which can avoid the short axis dimension from interfering with the inspection of the long axis. Similarly, the long axis dimension of the short axis stop gauge 22 is designed to be smaller than the minimum value of the long axis of the oblong hole 1a, which can avoid the long axis dimension from interfering with the inspection of the short axis.

[0054] See Figure 2 Optionally, both ends of the go gauge 10 are provided with guide surfaces 11, which are conical or arc-shaped transition surfaces. The conical or arc-shaped transition surfaces at both ends of the go gauge 10 maintain the same geometric proportions as the working part in the middle of the go gauge 10. Guided by the guide surfaces 11, the go gauge 10 can smoothly insert into or pass through the elongated hole 1a and conform to the contour of the elongated hole 1a. In this embodiment, to enhance the stop-go gauge effect, the long-axis stop-go gauge 21 and the short-axis stop-go gauge 22 are not designed with guide surfaces or only have small-range rounded transitions.

[0055] See Figure 6The long axis stop gauge 21 has side planes 211 on both sides of its short axis, and the distance between the two side planes 211 is the short axis dimension of the long axis stop gauge 21. The side planes 211 are formed by flattening the two sides of the short axis of the long axis stop gauge 21, so that the distance between the two side planes 211 is the short axis dimension, and is less than the minimum value of the short axis of the oblong hole 1a. This allows the long axis stop gauge 21 to be specifically used to detect whether the long axis direction of the oblong hole 1a is out of tolerance, avoiding misjudgment caused by the short axis dimension of the long axis stop gauge 21 getting stuck and unable to pass through the oblong hole 1a.

[0056] See Figure 10 The short-axis stop gauge 22 has concave surfaces 221 on both sides of its long axis. The maximum distance between the two concave surfaces 221 is the long axis dimension of the short-axis stop gauge 22 cross section. By concave or inwardly curving the two sides of the long axis of the short-axis stop gauge 22 to form concave surfaces 221, the maximum distance between the two concave surfaces 221 is taken as the long axis dimension, and is less than the minimum value of the long axis of the oblong hole 1a. This allows the short-axis stop gauge 22 to be specifically used to detect whether the short axis direction of the oblong hole 1a is out of tolerance, avoiding misjudgment caused by the short-axis stop gauge 22 getting stuck and unable to pass through the oblong hole 1a due to the long axis dimension of the short-axis stop gauge 22.

[0057] See Figure 4 Optionally, both the long axis stop gauge 21 and the short axis stop gauge 22 are provided with stop gauge positioning marks for axial alignment with the oblong hole 1a. Optionally, the go gauge 10 is provided with a go gauge positioning mark for axial alignment with the oblong hole 1a. The positioning marks are designed to ensure axial alignment with the oblong hole 1a during inspection, preventing positioning deviations from affecting the inspection results.

[0058] In this embodiment, the words "long axis stop gauge" are engraved on the side plane 211 along its own length direction as a positioning mark, and the words "short axis stop gauge" are engraved on the outer periphery of the constricted surface 221 along its own length direction as a positioning mark. In other embodiments, grooves or arrows may also be used as positioning marks.

[0059] See Figure 4 , Figure 11 and Figure 12 The stop gauge assembly 20 also includes a connecting structure 23, which has a main handle 231 and two branch sections 232. The ends of the two branch sections 232 are connected to the main handle 231, and the front ends of the branch sections 232 are connected to either the long-axis stop gauge 21 or the short-axis stop gauge 22. By using the connecting structure 23 to simultaneously clamp both the long-axis stop gauge 21 and the short-axis stop gauge 22, repeated disassembly and assembly are not required during inspection, making it suitable for batch inspection operations and reducing operation time.

[0060] In this embodiment, two branch segments 232 are arranged side by side with spacing on one side of the main handle 231, and the axes of the long axis stop gauge 21 and the short axis stop gauge 22 are parallel. Arranging the long axis stop gauge 21 and the short axis stop gauge 22 side by side with spacing and parallel axes can avoid interference and improve the smoothness of the inspection. The long axis stop gauge 21 and the short axis stop gauge 22 can inspect different pipe materials at the same time, improving the inspection efficiency, and at the same time avoiding misjudgment caused by the tilt of the stop gauge.

[0061] In this embodiment, the connecting structure 23 is an integral fork-shaped structure; alternatively, positioning marks can be laser-engraved on the fork-shaped structure to replace the positioning marks on the long axis stop gauge 21 and the short axis stop gauge 22.

[0062] Optionally, both the long-axis stop gauge 21 and the short-axis stop gauge 22 are detachably connected to the branch section 232. Detachably mounting the long-axis stop gauge 21 and the short-axis stop gauge 22 allows for gauge replacement when inspecting different pipe materials, facilitates regular maintenance, and extends service life.

[0063] In this embodiment, the long shaft stop gauge 21 is provided with a threaded hole 21a that mates with the first branch section 232, and the short shaft stop gauge 22 is provided with a threaded post 22a that mates with the second branch section 232. The threaded connection clamping is stable and reliable, effectively preventing loosening or falling off during the testing process, ensuring clamping stability. The threaded connection is simple to install and remove and easy to operate, and flexible clamping can be achieved by adjusting the engagement depth of the thread.

[0064] Taking a long oval tube 1 with a major axis inner diameter acceptable range of 6.00mm~6.10mm, a minor axis inner diameter acceptable range of 4.00mm~4.05mm, and a tube length of approximately 100mm as an example, the following is the size design of the go / no-go gauge device and the specific inspection process for this long oval tube 1:

[0065] General specification 10: Manufacture a solid column with a major axis dimension A1 of 6.00 mm, a minor axis dimension B1 of 4.00 mm, and a working length of 120 mm. Machine conical or arc transition surfaces in proportion to the cross section at both ends of the solid column as guide surfaces 11.

[0066] Long axis stop gauge 21: Manufacture a gauge body with a cross-sectional long axis dimension A2 of 6.10mm, a cross-sectional short axis dimension B2 (i.e., the distance between the two side planes 211 after flattening) of 3.90mm, and a working length of 20mm. Machin a small fillet at one end of the gauge body and machine an M3 internal thread hole at the other end as a thread hole 21a.

[0067] Short axis stop gauge 22: A gauge body is manufactured with a short axis dimension B3 of 4.05mm, a long axis dimension A3 (i.e., the maximum distance between the two contracted arc surfaces 221) of 5.95mm, and a working length of 20mm. One end of the gauge body is machined with a small fillet, and the other end is machined with an M3 external thread post as a thread post 22a. It can be understood that an external thread post can also be machined on the long axis stop gauge 21, and the internal thread hole can be reinforced on the short axis stop gauge 22.

[0068] Connection structure 23: A fork-shaped structure is manufactured, and the ends of the two branch segments 232 of the fork-shaped structure are respectively machined with M3 internal threads and M3 external threads. The long shaft stop gauge 21 and the short shaft stop gauge 22 are tightened and fixed respectively. Positioning marks are engraved on the fork-shaped structure or the stop gauge.

[0069] During testing, the go gauge 10 is attempted to be inserted into the elongated hole 1a of the elongated tube 1. If it can be inserted smoothly, it indicates that the lower limit of the size and shape of the elongated hole 1a are basically qualified. Aligning the positioning mark, the long axis stop gauge 21 and the short axis stop gauge 22 on the assembled stop gauge assembly 20 are attempted to be inserted into the elongated hole 1a. If neither the long axis stop gauge 21 nor the short axis stop gauge 22 can be inserted (or the insertion depth is <1mm), then the elongated tube 1 is qualified; if either stop gauge can be inserted significantly, then the elongated tube 1 is deemed unqualified.

[0070] Example 2

[0071] In Embodiment 1, a connecting structure 23 is used to simultaneously clamp the long axis stop gauge 21 and the short axis stop gauge 22. Unlike Embodiment 1, in this embodiment, the long axis stop gauge 21 and the short axis stop gauge 22 are directly connected. For example... Figure 13 and Figure 14 As shown, the long shaft stop gauge 21 has a threaded hole 21a at one end, and the short shaft stop gauge 22 has a threaded post 22a at one end that mates with the threaded hole 21a. The long shaft stop gauge 21 and the short shaft stop gauge 22 are directly threaded together, resulting in a compact structure that occupies less space and is convenient to carry and store.

[0072] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A go / no-go gauge device, characterized in that, For detecting oblong holes (1a), including: The GO gauge (10) is a cylinder and its cross-sectional shape matches the shape of the elongated hole (1a). The outer circumferential dimensions of the GO gauge (10) match the minimum acceptable dimensions of the elongated hole (1a). The stop gauge assembly (20) includes a long axis stop gauge (21) and a short axis stop gauge (22). The working length of the go gauge (10) is greater than the length of the elongated hole (1a). The working lengths of the long axis stop gauge (21) and the short axis stop gauge (22) are both less than the working length of the go gauge (10). The long axis dimension of the cross section of the long axis stop gauge (21) is equal to the maximum value of the long axis of the elongated hole (1a). The short axis dimension of the cross section of the long axis stop gauge (21) is less than the minimum value of the short axis of the elongated hole (1a). The short axis dimension of the cross section of the short axis stop gauge (22) is equal to the maximum value of the short axis of the elongated hole (1a). The long axis dimension of the cross section of the short axis stop gauge (22) is less than the minimum value of the long axis of the elongated hole (1a).

2. The go / no-go gauge device according to claim 1, characterized in that, The long axis stop gauge (21) has side planes (211) on both sides of its short axis, and the distance between the two side planes (211) is the short axis dimension of the long axis stop gauge (21).

3. The go / no-go gauge device according to claim 1, characterized in that, The short axis stop gauge (22) has a constricted arc surface (221) on both sides of its long axis, and the maximum distance between the two constricted arc surfaces (221) is the long axis dimension of the cross section of the short axis stop gauge (22).

4. The go / no-go gauge device according to claim 1, characterized in that, The stop gauge assembly (20) further includes a connection structure (23), which has a main handle (231) and two branch sections (232). The ends of the two branch sections (232) are connected to the main handle (231), and the front ends of the branch sections (232) are connected to the long axis stop gauge (21) or the short axis stop gauge (22).

5. The go / no-go gauge device according to claim 4, characterized in that, The two branch segments (232) are arranged side by side at intervals on one side of the main handle (231), and the axes of the long axis stop gauge (21) and the short axis stop gauge (22) are parallel.

6. The go / no-go gauge device according to claim 4, characterized in that, Both the long axis stop gauge (21) and the short axis stop gauge (22) are detachably connected to the branch section (232).

7. The go / no-go gauge device according to claim 6, characterized in that, The long shaft stop gauge (21) is provided with a threaded hole (21a) that is threaded to the first branch segment (232), and the short shaft stop gauge (22) is provided with a threaded post (22a) that is threaded to the second branch segment (232).

8. The go / no-go gauge device according to claim 1, characterized in that, The long shaft stop gauge (21) is provided with a threaded hole (21a), and the short shaft stop gauge (22) is provided with a threaded post (22a) that mates with the threaded hole (21a).

9. The go / no-go gauge device according to any one of claims 1-8, characterized in that, The gauge (10) has guide surfaces (11) at both ends, and the guide surfaces (11) are conical surfaces or circular arc transition surfaces.

10. The go / no-go gauge device according to any one of claims 1-8, characterized in that, The go gauge (10) is provided with a go gauge positioning mark for axial alignment with the elongated hole (1a); And / or, both the long axis stop gauge (21) and the short axis stop gauge (22) are provided with stop gauge positioning marks for axial alignment with the elongated hole (1a).

Images