Threaded hole verticality testing fixture

Abstract

The utility model relates to a threaded hole verticality detection tool, which is used for detecting the verticality of a threaded hole of a workpiece relative to a threaded hole processing end face, and comprises a first detection part of which the front end is provided with a first external thread, a second detection part of which the front end is provided with a second external thread, and an axial driving part connected with the first detection part and the second detection part, the first detection part and the second detection part are coaxially arranged, so that the first external thread and the second external thread have a detection state that the first external thread and the second external thread are in threaded connection with internal threads arranged on the inner wall of the threaded hole at the same time; the axial driving piece is provided with a pushing part abutting against the second detection part, the pushing part is used for applying axial tensioning force to the second detection part, so that at least the second external thread and the internal thread are axially locked, and the detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a threaded hole verticality detection tool. Background Art

[0002] Connecting rods are commonly used in power equipment to transmit power or connect two different parts. When assembled with external structures, threaded holes on the connecting rod engage bolts to achieve the connection. Therefore, ensuring that the threaded holes meet design parameters after machining plays a significant role in the overall assembly of the connecting rod, such as the perpendicularity of the threaded hole relative to the machined end surface.

[0003] When testing the verticality of a threaded hole, the central axis of the threaded hole must be accurately simulated to ensure accurate detection of the verticality of the threaded hole. Conventional methods for testing the verticality of a threaded hole typically align the external threads on a thread plug gauge with the internal threads on the inner wall of the threaded hole, and then use the central axis of the thread plug gauge to simulate the central axis of the threaded hole. However, due to a certain gap between the external and internal threads after assembly, the thread plug gauge can move or vibrate radially during the test, affecting the verticality of the threaded hole.

[0004] Therefore, it is urgent for those skilled in the art to provide a threaded hole verticality inspection tool to improve the accuracy of workpiece threaded hole verticality inspection. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to overcome the defects in the prior art, thereby providing a threaded hole verticality inspection tool.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A threaded hole verticality inspection tool, used to detect the verticality of a threaded hole of a workpiece relative to the processed end face of the threaded hole, comprising a first inspection part with a first external thread at the front end, a second inspection part with a second external thread at the front end, and an axial driving member connecting the first inspection part and the second inspection part; the first inspection part and the second inspection part are coaxially arranged so that the first external thread and the second external thread have a detection state in which they are simultaneously threadedly connected to the internal thread provided on the inner wall of the threaded hole; the axial driving member has a pushing part that abuts against the second inspection part, and the pushing part is used to apply axial tensioning force to the second inspection part so that at least the second external thread is axially locked with the internal thread.

[0008] Preferably, the first detection part includes a threaded shaft with the first external thread on the outer wall, and an optical shaft fixedly connected to the end of the threaded shaft; the second detection part has an axial through groove, the inner wall of the axial through groove is provided with an axial guide groove, the optical shaft is rotatably arranged in the axial through groove, and is provided with a pin shaft that cooperates with the axial guide groove.

[0009] Preferably, the pushing portion is rotatably installed in the axial through-groove; the diameter of the slot of the axial through-groove is smaller than the diameter of the pushing portion, so that the pushing portion is against one side of the slot and applies axial tension to the second detection portion.

[0010] Preferably, the axial driving member further includes an extension shaft threadedly connected to a distal end of the first detection portion.

[0011] Preferably, the outer wall surface of the second detection portion is further provided with a detection ring that cooperates with the smooth section of the threaded hole.

[0012] Preferably, it also includes a measuring part, which includes a first spherical part, a second spherical part and a rotation detection part; the rotation detection part cooperates with the outer cylindrical surface of the first spherical part through a matching groove, and is fixedly connected to the second spherical part; the first spherical part is fixedly installed relative to the first detection part and the second detection part installed in the threaded hole, and the center of the first spherical part is located on the central axis of the first detection part and the second detection part; the arc surface of the second spherical part is against the processed end face of the threaded hole.

[0013] Preferably, the rotating detection component includes a rotating frame and a detector fixed on the rotating frame; the rotating frame is provided with a mounting cavity rotatably connected to the outer wall surface of the second detection part, and the matching groove is provided on the bottom wall of the mounting cavity.

[0014] Preferably, it further comprises a base plate and a fixing member; the fixing member is fixed on the base plate and is used to fix the workpiece.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The above technical solution provides a threaded hole verticality inspection tool, in which a separate first external thread and a second external thread are simultaneously matched with the internal thread of the threaded hole, so that the first detection part and the second detection part cooperate with each other to simulate the central axis of the threaded hole. Compared with the single set of thread matching, the solution to be protected by this application enables the two sections of thread to interfere with each other by simultaneously matching with the internal thread of the threaded hole, so as to reduce the matching gap between the threads when a single thread is matched, which easily causes the rod to jump or move, thereby increasing the accuracy of the simulation of the central axis of the threaded hole and further improving the accuracy of the verticality detection of the threaded hole; at the same time, the solution to be protected by this application also applies an axial tightening force to the second detection part through the pushing part of the axial driving part, which can axially lock at least the second external thread and the internal thread, increase the force between the second external thread and the internal thread, and then limit the jumping of the first detection part and the second detection part through the axial force, thereby increasing the accuracy of the simulation of the central axis of the threaded hole and further improving the accuracy of the verticality detection of the threaded hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a structural diagram of one implementation of the present invention.

[0019] Figure 2 for Figure 1 Schematic diagram of the partial cross-section of the workpiece.

[0020] Figure 3 for Figure 1 Schematic diagram of the connection between the first detection part, the second detection part and the axial drive member.

[0021] Figure 4 for Figure 1 Schematic diagram of the connection between the first detection part and the axial driving part.

[0022] Figure 5 for Figure 1 Schematic cross-section diagram.

[0023] Figure 6 for Figure 5 Enlarged schematic diagram of position A in the middle.

[0024] Figure 7 for Figure 5 Enlarged schematic diagram of position B in the middle.

[0025] Figure 8 for Figure 5 Enlarged schematic diagram of the C position in the middle.

[0026] Figure 9 for Figure 1 Enlarged schematic diagram of position D in the middle.

[0027] Description of reference numerals:

[0028] 100. Workpiece; 1001. Threaded hole; 10011. Internal thread; 10012. Smooth section; 1002. Processed end face of threaded hole; 1. First detection part; 11. First external thread; 12. Threaded shaft; 13. Optical axis; 14. Pin; 2. Second detection part; 21. Second external thread; 22. Axial through groove; 221. Notch; 23. Axial guide groove; 24. Detection ring; 3. Axial driving member; 31. Pushing member; 32. Extension shaft; 4. Measuring part; 41. First spherical member; 42. Second spherical member; 43. Rotating detection member; 430. Fitting groove; 431. Rotating frame; 432. Detector; 433. Mounting cavity; 5. Base plate; 6. Fixing member. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0032] See also Figures 1 to 9 An embodiment of the present utility model provides a threaded hole verticality inspection tool for inspecting the verticality of a threaded hole 1001 of a workpiece 100 relative to a threaded hole processing end surface 1002 .

[0033] Specifically, see Figures 1 to 4 The threaded hole verticality inspection tool provided in this embodiment includes a first inspection part 1 and a second inspection part 2. A first external thread 11 is provided at the front end of the first inspection part 1, and a second external thread 21 is provided at the front end of the second inspection part 2. The first inspection part 1 and the second inspection part 2 are coaxially arranged so that the first external thread 11 and the second external thread 21 are simultaneously threadedly connected to the internal thread 10011 provided on the inner wall of the threaded hole 1001. That is, the first external thread 11 and the second external thread 21 are simultaneously mated with the internal thread 10011 of the threaded hole 1001 by the separate first external thread 11 and the second external thread 21, so that the first inspection part 1 and the second inspection part 2 cooperate with each other to simulate the central axis of the threaded hole 1001. Compared with a single set of thread mating, in this embodiment, the two threads are mated with the internal thread 10011 of the threaded hole 1001 simultaneously, so that the two threads can interfere with each other, thereby reducing the mating gap between the threads when a single thread is mated, which easily causes the rod to jump or move, thereby increasing the accuracy of the simulation of the central axis of the threaded hole 1001, and thus improving the accuracy of the verticality inspection of the threaded hole 1001.

[0034] Furthermore, the threaded hole verticality inspection tool also includes an axial driving member 3, which has a pushing portion 31 that is against the second detection portion 2. The pushing portion 31 is used to apply axial tensioning force to the second detection portion 2 so that at least the second external thread 21 is axially locked with the internal thread 10011, and the axial force is used to limit the vibration of the first detection portion 1 and the second detection portion 2, thereby increasing the accuracy of the simulation of the central axis of the threaded hole 1001, and further improving the accuracy of the verticality detection of the threaded hole 1001.

[0035] It is worth noting that in this embodiment, taking the threaded hole 1001 as an example, the "front end" refers to the end close to the internal thread 10011, and the "end" refers to the end away from the internal thread 10011, that is, from the end to the front end refers to the installation direction of the first detection part 1 and the second detection part 2.

[0036] See also Figures 3 to 7In this embodiment, the first detection portion 1 includes a threaded shaft 12 having a first external thread 11 on its outer wall, and an optical shaft 13 fixedly connected to the end of the threaded shaft 12. The second detection portion 2 has an axial through-groove 22, the inner wall of which is provided with an axial guide groove 23. The optical shaft 13 is rotatably mounted within the axial through-groove 22 and is provided with a pin 14 that cooperates with the axial guide groove 23. By installing the pin 14 within the axial guide groove 23, the first and second detection portions 1 and 2 can rotate simultaneously when they are installed in the threaded hole 1001, thereby allowing the first external thread 11 provided at the front end of the first detection portion 1 and the second external thread 21 provided at the front end of the second detection portion 2 to simultaneously cooperate with the internal thread 10011.

[0037] Furthermore, the pushing portion 31 is rotatably installed in the axial through-groove 22; the diameter of the notch 221 of the axial through-groove 22 is smaller than the diameter of the pushing portion 31, so that the pushing portion 31 is abutted against one side of the notch 221, and an axial tensioning force in the opposite direction of the Z direction is applied to the second detection portion 2, so that the second external thread 21 and the internal thread 10011 are axially squeezed and locked.

[0038] Furthermore, the axial drive member 3 further includes an extension shaft 32 threadedly connected to the end of the first detection portion 1. On the one hand, this further ensures that the central axes of the first detection portion 1, the second detection portion 2, and the axial drive member 3 remain aligned. On the other hand, when the pushing portion 31 of the axial drive member 3 pushes the second detection portion 2 and abuts against the notch 221, the axial drive member 3 continues to rotate, and an axial tensioning force in the Z direction is applied to the first detection portion 1 via the extension shaft 32, thereby axially squeezing and locking the first external thread 11 and the internal thread 10011.

[0039] Furthermore, the diameter of the pin 14 may be slightly smaller than the axial extension length of the axial guide groove 23 , so that the pin 14 can slide in the axial guide groove 23 , thereby enabling the first detection part 1 and the second detection part 2 to move relative to each other axially.

[0040] See also Figure 3 and Figure 6 The outer wall surface of the second detection part 2 is also provided with a detection ring 24 that cooperates with the smooth section 10012 of the threaded hole 1001, so that during the installation of the second detection part 2, the detection ring 24 can move axially along the smooth section 10012, and then perform synchronous detection on the smooth section 10012 to improve the accuracy of the detection of the workpiece 100.

[0041] The threaded hole verticality inspection tool further includes a measuring portion 4 , which can be configured in a variety of structures as long as it can associate the central axis of the threaded hole 1001 with the threaded hole processing end face 1002 .

[0042] See also Figure 8 and Figure 9 In this embodiment, the measuring part 4 includes a first spherical member 41, a second spherical member 42, and a rotation detection member 43. The rotation detection member 43 is engaged with the outer circumferential surface of the first spherical member 41 through a mating groove 430 and is fixedly connected to the second spherical member 42; the rotation detection member 43 is engaged with the outer circumferential surface of the first spherical member 41 through a mating groove 430 and is fixedly connected to the second spherical member 42; the first spherical member 41 is fixedly installed relative to the first detection part 1 and the second detection part 2 installed in the threaded hole 1001, and the center of the first spherical member 41 is located on the central axis of the first detection part 1 and the second detection part 2; the arc surface of the second spherical member 42 is against the threaded hole machined end surface 1002. Specifically, in this embodiment, the first spherical member 41 is fixedly mounted on the end of the axial drive member 3, and the rotation detection member 43 includes a rotating frame 431 and a detector 432 fixed to the rotating frame 431; the rotating frame 431 defines a mounting cavity 433 that is rotatably connected to the outer wall of the second detection portion 2 (the inner wall of the mounting cavity 433 of the rotating frame 431 can be directly rotatably connected to the outer wall of the second detection portion 2, or can be indirectly rotatably connected via a shaft sleeve), and the mating groove 430 is provided on the bottom wall of the mounting cavity 433. Of course, in other embodiments, the first spherical member 41 can also be fixedly connected to the first detection portion 1 or the second detection portion 2.

[0043] During the process of detecting the verticality of the threaded hole 1001, the rotating detection part 43 is rotated, and the change of the central axis of the threaded hole 1001 can be transmitted to the rotating detection part 43 through the first spherical part 41 and the matching groove 430. At the same time, the second spherical part 42 always remains against the threaded hole processing end face 1002, so that the verticality of the central axis of the threaded hole 1001 relative to the threaded hole processing end face 1002 can be detected by the detector 432 installed on the rotating detection part 43, that is, the rotating detection part 43 rotates one circle, and the difference in the runout of the threaded hole processing end face 1002 obtained by the detector 432 can be converted into the verticality of the threaded hole 1001.

[0044] See also Figure 1 The threaded hole verticality inspection tool further includes a base plate 5 and a fixing member 6; the fixing member 6 is fixed on the base plate 5 and is used to fix the workpiece 100. The fixing member 6 can be fixed by clamping the workpiece 100, expanding the workpiece 100, and the like.

[0045] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A threaded hole verticality inspection tool, used to inspect the verticality of a threaded hole of a workpiece relative to the processed end face of the threaded hole, characterized in that: It comprises a first detection part with a first external thread at the front end, a second detection part with a second external thread at the front end, and an axial driving member connecting the first detection part and the second detection part; The first detection portion and the second detection portion are coaxially arranged so that the first external thread and the second external thread are in a detection state of being simultaneously threadedly connected to the internal thread arranged on the inner wall of the threaded hole; The axial driving member has a pushing portion that abuts against the second detecting portion, and the pushing portion is used to apply an axial tensioning force to the second detecting portion so that at least the second external thread and the internal thread are axially locked.

2. A threaded hole verticality inspection tool according to claim 1, characterized in that: The first detection part comprises a threaded shaft having the first external thread on its outer wall surface, and an optical shaft fixedly connected to the end of the threaded shaft; The second detection part has an axial through groove, the inner wall of which is provided with an axial guide groove, the optical axis is rotatably arranged in the axial through groove, and is provided with a pin shaft which cooperates with the axial guide groove.

3. A threaded hole verticality inspection tool according to claim 2, characterized in that: The pushing portion is rotatably mounted in the axial through groove; The diameter of the notch of the axially penetrating groove is smaller than the diameter of the pushing portion, so that the pushing portion abuts against one side of the notch and applies an axial tensioning force to the second detecting portion.

4. A threaded hole verticality inspection tool according to any one of claims 1 to 3, characterized in that: The axial driving member further includes an extension shaft threadedly connected to a distal end of the first detection portion.

5. A threaded hole verticality inspection tool according to claim 1, characterized in that: The outer wall surface of the second detection portion is also provided with a detection ring that cooperates with the smooth section of the threaded hole.

6. A threaded hole verticality inspection tool according to claim 1, characterized in that: Also includes a measuring part, the measuring part includes a first spherical part, a second spherical part and a rotation detection part; The rotation detection member is matched with the outer circumferential surface of the first spherical member through a matching groove, and is fixedly connected with the second spherical member; The first spherical member is fixedly mounted relative to the first detection portion and the second detection portion mounted in the threaded hole, and the center of the first spherical member is located on the central axis of the first detection portion and the second detection portion; The arc surface of the second spherical member abuts against the processed end surface of the threaded hole.

7. A threaded hole verticality inspection tool according to claim 6, characterized in that: The rotating detection member comprises a rotating frame and a detector fixed on the rotating frame; The rotating frame is provided with an installation cavity which is rotatably matched with the outer wall surface of the second detection part, and the matching groove is arranged on the bottom wall of the installation cavity.

8. A threaded hole verticality inspection tool according to claim 1, characterized in that: Also includes base plate and fixings; The fixing member is fixed on the bottom plate and is used for fixing the workpiece.

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