A threaded hole depth detection device

Abstract

The utility model discloses a threaded hole depth detection device, this threaded hole depth detection device includes detection rod and contrast board, and detection rod is screwed on the threaded hole of the workpiece of detection through the thread gauge, and contrast board is connected on the workpiece of detection through the positioning pin, and the detection rod is connected with the scale dial, and the initial value of scale dial is aligned with the pointer of contrast board, and the detection rod is made to screw into the threaded hole, and scale dial rotates with detection rod, and the depth of threaded hole is read according to the value of the pointer of scale dial. The threaded hole depth detection device provided by the utility model is screwed in the threaded hole through the detection rod provided with the thread gauge, and the detection rod is rotated, and the thread gauge is screwed into the threaded hole, and the scale dial rotates with the detection rod, and then the contrast board connected on the workpiece of detection points to the scale of scale dial through the pointer, and when the thread gauge is completely screwed into the threaded hole, whether the pointer points to the prescribed scale range is observed, and then the depth of threaded hole is accurately detected.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical casting, and in particular relates to a thread hole depth detection device. Background Technology

[0002] In the production of automotive engine components, high-precision threaded holes are often required. The depth of these holes must be controlled within ±0.01mm. Therefore, strict inspection is necessary after machining to remove defective products. Traditionally, threaded hole depth is inspected using a depth gauge.

[0003] Traditional measurement methods (such as ordinary depth gauges) have a fundamental flaw: the depth gauge is prone to getting stuck between the threads, resulting in a reading that is larger than the actual effective depth. Therefore, they cannot meet the requirements for high-precision measurement of threaded hole depth.

[0004] Therefore, there is an urgent need to design a thread hole depth detection device to solve the problems mentioned above. Utility Model Content

[0005] To address the technical problem mentioned in the background art where depth gauges easily get stuck between thread teeth when measuring the depth of threaded holes, resulting in readings that are larger than the actual effective depth, a threaded hole depth detection device is provided to solve the problem of accurately detecting the depth of threaded holes.

[0006] To achieve the above objectives, the specific technical solution of the threaded hole depth detection device of this utility model is as follows: A threaded hole depth detection device includes a detection rod and a comparison plate. The detection rod is screwed onto the threaded hole of the workpiece to be inspected via a thread gauge. The comparison plate is connected to the workpiece to be inspected via a locating pin. A scale dial is connected to the detection rod. The initial value of the scale dial is aligned with the pointer of the comparison plate. When the detection rod is rotated, it is screwed into the threaded hole. The scale dial rotates with the detection rod. The depth of the threaded hole is read from the value indicated by the pointer on the scale dial.

[0007] Furthermore, a thread gauge is connected to one end of the testing rod so that the testing rod is screwed onto the threaded hole via the thread gauge.

[0008] Furthermore, a connecting part is provided on the side wall of the end of the testing rod away from the thread gauge, and a scale dial is abutted on the connecting part so that the scale dial rotates with the testing rod.

[0009] Furthermore, a limit nut is screwed onto the detection rod, which fixes the scale dial to the connecting part.

[0010] Furthermore, a shim is held between the connecting part of the detection rod and the threaded hole port, and the shim limits the maximum threaded length of the thread gauge.

[0011] Furthermore, the gasket has an opening so that a thread gauge can be inserted into the threaded hole through the opening.

[0012] Furthermore, the workpiece to be inspected is provided with insertion holes, and the insertion holes and threaded holes are spaced apart on the workpiece to be inspected.

[0013] Furthermore, the comparison plate has positioning holes, and positioning pins pass through the positioning holes and are inserted into the insertion holes to fix the comparison plate on the workpiece to be inspected.

[0014] Furthermore, a pointer is provided on the side of the comparison plate away from the positioning hole so that the pointer is aligned vertically with the scale of the dial.

[0015] Furthermore, a positioning pin is inserted into the side of the positioning pin away from the insertion hole, so that the positioning pin is fixedly connected to the positioning hole of the comparison plate.

[0016] The thread hole depth detection device of this utility model has the following advantages: A test rod equipped with a thread gauge is screwed into a threaded hole. Rotating the test rod screws the thread gauge into the threaded hole, causing a scale dial to rotate. This, in turn, causes a comparison plate connected to the workpiece to move its pointer to the scale graduation on the dial. Once the thread gauge is fully screwed into the threaded hole, the pointer is observed to ensure it falls within the specified graduation range, thus accurately measuring the thread depth. This application has low manufacturing costs, can be mass-produced, is suitable for mass production environments, and is easy to operate, making it ideal for frontline employees with no prior experience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the thread hole depth detection device of this utility model; Figure 2 This is a top view schematic diagram of the thread hole depth detection device of this utility model.

[0018] Explanation of markings in the diagram: 1. Detection rod; 2. Comparison plate; 3. Thread gauge; 4. Threaded hole; 5. Locating pin; 6. Scale dial; 7. Pointer; 8. Connecting part; 9. Limit nut; 10. Washer; 11. Locating pin. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0021] The following is a reference to the appendix. Figure 1 To be continued Figure 2 This invention describes a threaded hole depth detection device.

[0022] like Figure 1 As shown, the thread hole depth detection device of this utility model includes a detection rod 1 and a comparison plate 2. The detection rod 1 is screwed onto the thread hole 4 of the workpiece to be inspected through a thread gauge 3. The comparison plate 2 is connected to the workpiece to be inspected through a positioning pin 5. A scale dial 6 is connected to the detection rod 1. The initial value of the scale dial 6 is aligned with the pointer 7 of the comparison plate 2. When the detection rod 1 is rotated, it is screwed into the thread hole 4. The scale dial 6 rotates with the detection rod 1. The depth of the thread hole 4 is then read according to the value pointed to by the pointer 7 on the scale dial 6.

[0023] The detection rod 1, equipped with a thread gauge 3, is screwed into the threaded hole 4. By rotating the detection rod 1, the thread gauge 3 is screwed into the threaded hole 4. The scale dial 6 rotates with the detection rod 1, and the comparison plate 2 connected to the workpiece to be inspected points to the scale of the scale dial 6 through the pointer 7. After the thread gauge 3 is fully screwed into the threaded hole 4, it is observed whether the pointer 7 points to the specified scale range, thereby accurately detecting the depth of the threaded hole 4.

[0024] Furthermore, such as Figure 1 As shown, the thread gauge 3 is connected to one end of the detection rod 1 so that the detection rod 1 is screwed onto the threaded hole 4 through the thread gauge 3; a connecting part 8 is provided on the side wall of the end of the detection rod 1 away from the thread gauge 3, and a scale dial 6 is abutted on the connecting part 8 so that the scale dial 6 rotates with the detection rod 1; a limit nut 9 is screwed onto the detection rod 1, and the scale dial 6 is fixed to the connecting part 8 by the limit nut 9.

[0025] In this embodiment, preferably, the thread gauge 3 is welded to the end of the detection rod 1, and the detection rod 1 is screwed onto the threaded hole 4 to be tested through the fixedly connected thread gauge 3. A connecting part 8 is vertically connected to the side wall of the detection rod 1, the scale dial 6 is abutted against the connecting part 8, and the limiting nut 9 is screwed onto the end of the detection rod 1 away from the thread gauge 3. By rotating the limiting nut 9, the scale dial 6 is fixedly set on the detection rod 1, and the scale dial 6 can rotate with the rotation of the detection rod 1.

[0026] The dial 6 is limited by the limiting nut 9, which makes it easy to remove the dial 6 from the detection rod 1. The corresponding dial 6 can be replaced according to the threaded hole 4 of different depths, so as to realize the detection of threaded holes 4 of various depths.

[0027] Furthermore, such as Figure 1 As shown, a washer 10 is held between the connecting part 8 of the detection rod 1 and the port of the threaded hole 4, and the maximum threading length of the thread gauge 3 is limited by the washer 10; the washer 10 is provided with an opening so that the thread gauge 3 can pass through the opening and be inserted into the threaded hole 4.

[0028] In this embodiment, preferably, the gasket 10 is annular, the detection rod 1 passes through the gasket 10 and the end thread gauge 3 is screwed onto the threaded hole 4, and the gasket 10 is clamped between the connecting part 8 of the detection rod 1 and the port of the threaded hole 4. By selecting gaskets 10 of different thicknesses to be clamped between the connecting part 8 and the port of the threaded hole 4, the detection of threaded holes 4 of different depths can be realized.

[0029] Furthermore, such as Figure 1 and Figure 2 As shown, the workpiece to be inspected is provided with a insertion hole, and the insertion hole and the threaded hole 4 are spaced apart on the workpiece to be inspected; the comparison plate 2 is provided with a positioning hole, and the positioning pin 5 passes through the positioning hole and is inserted into the insertion hole to fix the comparison plate 2 on the workpiece to be inspected; the comparison plate 2 is provided with a pointer 7 on the side away from the positioning hole so that the pointer 7 is aligned with the scale of the scale dial 6 in the vertical direction; the positioning pin 5 is inserted into the positioning nail 11 on the side away from the insertion hole so that the positioning pin 5 is fixedly connected to the positioning hole of the comparison plate 2.

[0030] In this embodiment, a hole is provided on the workpiece to be inspected as a temporary insertion hole for the positioning pin 5, and the selected temporary insertion hole is spaced a certain distance from the threaded hole 4 on the workpiece to be inspected.

[0031] Preferably, a positioning hole is provided on one side of the comparison plate 2, and the positioning pin 5 passes through the positioning hole and is inserted into the insertion hole, thereby fixing the comparison plate 2 to ensure the accuracy of the detection; the comparison plate 2 is provided with a pointer 7, and the pointer 7 is located on the side of the comparison plate 2 away from the positioning hole, that is, the pointer 7 points to the scale dial 6, which is used to read the reading of the scale dial 6 to detect the depth of the threaded hole 4.

[0032] As a preferred embodiment, the dial 6 has an initial value, i.e., a starting point; and multiple interval values ​​are marked at equal intervals along the circumference of the dial 6, each interval representing 0.01mm, and the dial 6 is marked with a qualified thread hole depth area.

[0033] Rotate the test rod 1 clockwise until it is screwed into the threaded hole 4. When the test rod 1 stops at the predetermined size, the scale dial 6 will also stop rotating. At this time, if the pointer 7 points to the qualified area of ​​the scale dial 6, it means that the depth of the threaded hole 4 is qualified; if the pointer points to an area outside the qualified area, it means that the depth of the threaded hole 4 is unqualified.

[0034] The acceptable range refers to a certain range value plus or minus 0.01mm as the acceptable depth of the threaded hole 4. The definition of the certain range value is determined when designing the threaded hole depth. For different threaded hole depths, the acceptable range of the scale dial 6 is different, so that the detection device can detect threaded holes of various depths.

[0035] Furthermore, when the dial 6 is rotated clockwise, if the pointer 7 points to the initial value and the qualified range, it is considered that the threaded hole design is relatively short. The distance between the pointer 7 and the qualified range can provide the inspector with the missing depth value of the threaded hole. If the pointer 7 points to a value outside the qualified range, it is considered that the threaded hole design is relatively deep. The distance between the pointer 7 and the qualified range can provide the inspector with the excess depth value of the threaded hole.

[0036] The working principle of the threaded hole depth detection device in this utility model is as follows: First, based on the required depth of the threaded hole 4 in the design, select a scale dial 6 with a corresponding qualified area and fix it on the detection rod 1; Then, the detection rod 1 is initially screwed onto the threaded hole 4; Then, the comparison plate 2 is fixed to the workpiece to be inspected by the positioning pin 5; Then, rotate the test rod 1 clockwise so that the thread gauge 3 of the test rod 1 is fully screwed into the threaded hole 4 of the depth to be measured; Then, determine whether the depth of the threaded hole 4 meets the design standard based on the area pointed to by pointer 7 on dial 6; Finally, remove the locating pin 5, rotate the detection rod 1 counterclockwise, and repeat the above steps to perform depth detection on other threaded holes.

[0037] Based on the thread hole depth detection device, this utility model not only overcomes the technical problems of high difficulty and low accuracy in thread hole depth measurement, but also has low manufacturing cost, can be mass-produced, is suitable for mass production processing environment, and is easy to operate, making it more suitable for front-line employees with no experience.

[0038] 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 other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations 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 threaded hole depth detection device, characterized in that, The device includes a detection rod and a comparison plate. The detection rod is screwed onto the threaded hole of the workpiece to be inspected via a thread gauge. The comparison plate is connected to the workpiece to be inspected via a locating pin. A scale dial is connected to the detection rod. The initial value of the scale dial is aligned with the pointer of the comparison plate. By rotating the detection rod, it is screwed into the threaded hole. The scale dial rotates with the detection rod. The depth of the threaded hole can be read based on the value indicated by the pointer on the scale dial.

2. The threaded hole depth detection device according to claim 1, characterized in that, The thread gauge is connected to one end of the test rod so that the test rod is screwed onto the threaded hole via the thread gauge.

3. The threaded hole depth detection device according to claim 1, characterized in that, A connecting part is provided on the side wall of the end of the test rod away from the thread gauge, and a scale dial is abutted on the connecting part so that the scale dial rotates with the test rod.

4. The threaded hole depth detection device according to claim 3, characterized in that, A limit nut is screwed onto the detection rod, which fixes the scale dial to the connecting part.

5. The threaded hole depth detection device according to claim 3, characterized in that, A shim is held between the connecting part of the test rod and the threaded hole port, and the shim limits the maximum thread length of the thread gauge.

6. The threaded hole depth detection device according to claim 5, characterized in that, The gasket has an opening so that a thread gauge can be inserted into the threaded hole through the opening.

7. The threaded hole depth detection device according to claim 1, characterized in that, The workpiece to be inspected is provided with insertion holes, and the insertion holes and threaded holes are spaced apart on the workpiece to be inspected.

8. The threaded hole depth detection device according to claim 7, characterized in that, The comparison plate has positioning holes, and the positioning pins pass through the positioning holes and are inserted into the insertion holes to fix the comparison plate on the workpiece to be inspected.

9. The threaded hole depth detection device according to claim 8, characterized in that, A pointer is provided on the side of the comparison plate away from the positioning hole so that the pointer is aligned vertically with the scale of the dial.

10. The threaded hole depth detection device according to claim 8, characterized in that, Insert the positioning pin into the positioning nail on the side of the positioning pin away from the insertion hole so that the positioning pin is fixedly connected to the positioning hole of the comparison plate.

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