A threaded hole measuring device and method with positioning function

Abstract

The application discloses a threaded hole measuring device with a positioning function and a method, relates to the threaded hole measuring technical field, and comprises a detection main body provided with a measuring needle, and symmetrical fixing plates are arranged on the two sides of the detection main body and are slidably connected with sliding blocks; the sliding blocks are penetrated by first movable rods, the outer sides of the first movable rods are provided with first elastic members, and the first movable rods are connected with threaded hole positioning assemblies; the threaded hole positioning assembly is provided with a positioning rod, and is used for moving the positioning rod to be attached to the inner wall of a threaded hole during pressing the detection main body. The threaded hole measuring device can realize automatic positioning of the measuring needle and the threaded hole and improve the measuring precision.

Description

Technical Field

[0001] This invention relates to the field of thread measurement technology, and in particular to a thread hole measuring device and method with positioning function. Background Technology

[0002] Threaded hole measurement typically uses go / no-go gauges. During the measurement process, it is necessary to select an appropriate go / no-go gauge size based on the size and type of the threaded hole to ensure that the thread cutting edge of the go / no-go gauge matches the threaded hole to be measured. Go / no-go gauges have certain limitations in use; they are not only cumbersome to operate, but also cannot meet the standard measurement accuracy when measuring more precise threaded holes.

[0003] To overcome the problems existing in the measurement of go and no-go gauges, the prior art discloses a full parameter measuring device for internal threaded holes of components, including a main unit, a contact scanning probe assembly and a processing terminal. One end of the probe assembly is connected to the main unit, and the other end extends into the internal threaded hole to scan the internal thread, which can realize the full parameter measurement of the internal threaded hole. Although the above solution can achieve precise measurement of internal threaded holes, the probe and the threaded hole are prone to positioning deviation, which will still affect the measurement accuracy to a certain extent. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a threaded hole measuring device and method with positioning function, which can realize the automatic positioning of the probe and the threaded hole and improve the measurement accuracy.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] In a first aspect, the present invention provides a threaded hole measuring device with positioning function, comprising a detection body on which a probe is installed, and fixing plates symmetrically installed on both sides of the detection body, the fixing plates being slidably connected to a slider; the slider is passed through by a first movable rod, a first elastic element is sleeved on the outside of the first movable rod, and the first movable rod is connected to a threaded hole positioning assembly; the threaded hole positioning assembly has a positioning rod, which is used to move the positioning rod to fit against the inner wall of the threaded hole during the pressing of the detection body.

[0007] As a further implementation, the fixing plate is set perpendicular to the pressing direction of the detection body, and the upper surface of the fixing plate is provided with an arc-shaped groove for the movement of the slider.

[0008] As a further implementation, the threaded hole positioning assembly includes a vertical piston assembly, a horizontal piston assembly, and a positioning plate. The positioning rod is vertically fixed to one end of the positioning plate, and the other end of the positioning plate is connected to the vertical piston assembly through the horizontal piston assembly.

[0009] Furthermore, the vertical piston assembly is slidably connected to the positioning plate, and the vertical piston assembly and the horizontal piston assembly have a communicating cavity filled with hydraulic oil.

[0010] As a further implementation, the vertical piston assembly includes a second movable rod, one end of which is connected to the first movable rod via a first connecting plate, and the other end of which is slidably disposed within the first housing via a first piston;

[0011] The transverse piston assembly includes a second housing that communicates with the first housing. A sliding rod is provided inside the second housing. The sliding rod cooperates with the second housing through a second piston. A second elastic element is sleeved on the outside of the sliding rod, and one end of the sliding rod extending out of the second housing is connected to a positioning plate.

[0012] As a further implementation, a height positioning mechanism is also included, which includes a limiting post that can extend and retract relative to the slider, and a first limiting hole is provided at the set height of the first movable rod; one end of the limiting post is connected to the unlocking component, and the other end is used to cooperate with the first limiting hole.

[0013] As a further implementation, a first mounting bracket is fixed to the side of the slider away from the fixed plate, the limiting post passes through the first mounting bracket and the slider in sequence, and a third elastic element is sleeved on the portion of the limiting post located between the first mounting bracket and the slider so that it can extend and retract relative to the slider.

[0014] As a further implementation, the unlocking component includes a guide wheel and a rotating wheel mounted on the second mounting bracket, the limiting post being connected to one end of the traction rope, and the traction rope being connected to the rotating wheel after passing through the guide wheel.

[0015] As a further implementation, an angle adjustment mechanism is also included, which includes a limiting rod that engages with the slider. The fixing plate has multiple second limiting holes that can engage with the limiting rod. A fourth elastic element is installed at the end of the limiting rod that engages with the slider.

[0016] The two limit rods are connected by a second connecting plate.

[0017] As a further implementation, an auxiliary limiting mechanism is also included, which includes a friction plate and a friction roller. The friction plate can move up and down with the slider, and the friction roller is located below the friction plate and can rotate when the two are in contact.

[0018] Secondly, the present invention also provides a method for measuring threaded holes with a positioning function, employing the aforementioned measuring device, comprising:

[0019] Move the detection body so that the positioning plate fits against the upper side of the workpiece to be measured, and insert the positioning rod into the threaded hole of the workpiece to be measured;

[0020] Press down on the testing body until the limiting post mates with the first limiting hole; measure the threaded hole using a measuring pin.

[0021] Pull the second connecting plate upward to release the limiting rod from the limiting plate and the slider; rotate the detection body to the set angle, and use the limiting rod to limit the fixed plate and the slider again, and repeat the measurement steps;

[0022] Rotate the wheel to release the limiting post from the first limiting hole, reset the detection body, and simultaneously control the second connecting plate to restore the fixing plate and the detection body to their initial swing angle.

[0023] The beneficial effects of the present invention are as follows:

[0024] (1) The present invention sets up a threaded hole positioning component to make the positioning rod fit against the inner wall of the threaded hole, thereby making the measuring rod and the workpiece to be measured perpendicular to each other and achieving precise positioning; wherein, the threaded hole positioning component works in concert with the slider, the first movable rod, etc., and cooperates with the piston assembly with built-in hydraulic oil to realize the horizontal movement of the positioning plate, thereby achieving stable movement of the positioning plate and ensuring positioning accuracy.

[0025] (2) The present invention is equipped with a height positioning mechanism. By cooperating with the limiting post and the first limiting hole, the position of the detection body and the two second movable rods is kept stable. This avoids the detection body from causing the probe and probe to shake up and down when measuring the threaded hole of the workpiece, which would cause errors in the parameters of the probe scanning and further ensures the measurement accuracy.

[0026] (3) The present invention uses the slider, the fixing plate and the limiting rod to cooperate with each other so that the detection body and the two positioning plates are placed at different angles, thereby realizing the measurement of the threaded hole of the workpiece under one fixation, which improves the measurement accuracy of the threaded hole of the workpiece.

[0027] (4) The present invention also provides an auxiliary limiting mechanism to prevent the position of the first housing and the positioning plate from changing after the detection body is subjected to external force, which would cause the position of the probe in the threaded hole of the workpiece to change, thereby further improving the measurement accuracy of the threaded hole of the workpiece. Attached Figure Description

[0028] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0029] Figure 1 This is a schematic diagram of the measuring device and the workpiece to be measured according to one or more embodiments of the present invention.

[0030] Figure 2 This is a schematic diagram of the detection main structure according to one or more embodiments of the present invention;

[0031] Figure 3 This is a schematic diagram of the overall structure of the measuring device according to one or more embodiments of the present invention;

[0032] Figure 4 This is a schematic diagram of the threaded hole positioning assembly structure according to one or more embodiments of the present invention;

[0033] Figure 5 This is a schematic diagram of the internal structure of the threaded hole positioning assembly according to one or more embodiments of the present invention;

[0034] Figure 6 This is a schematic diagram of the height positioning mechanism structure according to one or more embodiments of the present invention;

[0035] Figure 7 This is a schematic diagram of the unlocking component structure according to one or more embodiments of the present invention;

[0036] Figure 8 This is a schematic diagram of the angle adjustment mechanism structure according to one or more embodiments of the present invention;

[0037] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0038] The components are as follows: 1. Measured part; 2. Detection body; 3. Handle; 4. Control panel; 5. Measuring rod; 6. Measuring stylus; 7. Fixing plate; 8. Slider; 9. First movable rod; 10. First connecting plate; 11. First elastic element; 12. Second movable rod; 13. First housing; 14. First piston; 15. Second housing; 16. Second piston; 17. Sliding rod; 18. Positioning plate; 19. Positioning rod; 20. First mounting bracket; 21. Limiting post; 22. Third elastic element; 23. First limiting hole; 24. Second mounting bracket; 25. Guide wheel; 26. Traction rope; 27. Rotating wheel; 28. Fixing bracket; 29. ​​Limiting rod; 30. Fourth elastic element; 31. Second connecting plate; 32. Friction plate; 33. Support frame; 34. Friction roller; 35. Second limiting hole; 36. Second elastic element. Detailed Implementation

[0039] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0040] Example 1:

[0041] This embodiment provides a threaded hole measuring device with positioning function, such as Figures 1-3As shown, the device includes a detection body 2, which is electrically connected to a processing terminal. The processing terminal calculates the specific parameters of the threaded hole of the workpiece 1 to be measured. The detection body 2 is a prior art device, which is equipped with a control panel 4, a handle 3, a probe 5, and a probe 6. The probe 5 is connected to the bottom of the detection body 2 via a moving component, allowing the probe 6 to move relative to the detection body 2. The probe 6 is used to measure the threaded hole of the workpiece 1 to be measured.

[0042] In this embodiment, with the mounting side of the control panel 4 as the front side, the handle 3 is located on the left side of the detection body 2.

[0043] Fixing plates 7 are symmetrically installed on the front and rear sides of the detection body 2. The fixing plates 7 are horizontally arranged, that is, the setting direction of the fixing plates 7 is perpendicular to the setting direction of the probe 6. In this embodiment, the fixing plates 7 are arc-shaped plates, and the centers of the two fixing plates 7 are the same point, and are on the same straight line as the center point of the detection body 2, so as to ensure that the detection body 2 rotates along the center of the fixing plates 7 during the swinging process.

[0044] like Figure 3 and Figure 4 As shown, the upper surface of the fixed plate 7 has an arc-shaped groove, and the slider 8 is slidably connected to the groove; the slider 8 is slidably connected to one end of the first movable rod 9, and the other end of the first movable rod 9 is fixedly connected to the first connecting plate 10. With the view direction as a reference, the probe 6 is arranged vertically, and the first movable rod 9 is located outside the fixed plate 7, also arranged vertically; combined with... Figure 8 The top end of the first movable rod 9 passes through the slider 8 and can move up and down relative to the slider 8; the top end of the first movable rod 9 has a limiting protrusion to prevent it from dislodging from the slider 8.

[0045] A first elastic element 11 is connected between the slider 8 and the first connecting plate 10, and the first elastic element 11 is sleeved on the outside of the first movable rod 9; the first connecting plate 10 is perpendicular to the first movable rod 9, that is, it is set horizontally, the first connecting plate 10 is fixedly connected to the first movable rod 9, and the other end is connected to the threaded hole positioning assembly, and the position between the measuring rod 5 and the threaded hole of the workpiece 1 to be measured is adjusted by the threaded hole positioning assembly.

[0046] Specifically, such as Figure 4 and Figure 5 As shown, the threaded hole positioning assembly includes a vertical piston assembly, a horizontal piston assembly, and a positioning plate 18. The vertical piston assembly includes a second movable rod 12, a first piston 14, and a first housing 13. The horizontal piston assembly includes a second piston 16, a second housing 15, a sliding rod 17, etc. The second movable rod 12 is parallel to the first movable rod 9. The top end of the second movable rod 12 is fixedly connected to the first connecting plate 10, and the bottom end of the second movable rod 12 is connected to the first piston 14. The first piston 14 is located inside the first housing 13, and the first housing 13 is filled with hydraulic oil.

[0047] The first housing 13 and the second movable rod 12 are coaxially arranged. The second housing 15 is located on one side of the first housing 13 and communicates with the first housing 13. In this embodiment, the second housing 15 is horizontally arranged, and the second housings 15 of the two sets of threaded hole positioning assemblies are located on opposite sides of each other. The second housing 15 is provided with a second piston 16, which is connected to one end of the sliding rod 17. The other end of the sliding rod 17 extends out from the end face of the second housing 15, and the extended end of the sliding rod 17 is connected to the positioning plate 18 through a connecting rod. The second housing 15 is provided with a second elastic element 36, which is sleeved on the outside of the sliding rod 17.

[0048] In this embodiment, both the first elastic element 11 and the second elastic element 36 are springs, and both the first movable rod 9 and the second movable rod 12 are spline rods.

[0049] The positioning plate 18 is horizontally positioned, and the bottom of the first housing 13 is slidably connected to the positioning plate 18. A positioning rod 19 is connected to the bottom of the positioning plate 18 away from the connecting rod. The positioning rod 19 is perpendicular to the positioning plate 18. The position of the positioning rod 19 is adjusted by moving the positioning plate 18 left and right. Positioning is achieved when the positioning rod 19 is in contact with the inner wall of the threaded hole. A soft anti-slip sleeve is provided on the outer side of the positioning rod 19 to increase the friction between the positioning rod 19 and the threaded hole, preventing circumferential rotation of the positioning rod 19 and the workpiece 1 to be measured during the measurement of the threaded hole. Positioning rods 19 of different diameters and lengths can be replaced according to the specific parameters of the threaded hole to adapt to different threaded holes.

[0050] The working principle of this embodiment is as follows:

[0051] When measuring the threaded hole of the workpiece 1, the testing body 2 is held by the handle 3 and placed on the upper side of the workpiece 1, so that the positioning rods 19 on both sides are inserted into the threaded hole of the workpiece 1. The testing body 2 is pressed down, and the testing body 2 moves the measuring rod 5 and the measuring needle 6 closer to the workpiece 1 through the moving component (the moving component is an existing mechanical transmission device used to move the measuring rod 5, which is not shown in the figure). During the above process, the measuring needle 6 is located on the upper side of the workpiece 1, and the two positioning plates 18 are attached to the upper side of the workpiece 1, so that the measuring rod 5 is perpendicular to the workpiece 1, thus avoiding the misalignment of the measuring rod 5 and the threaded hole of the workpiece 1.

[0052] After the detection body 2 is subjected to downward pressure, the detection body 2 drives the slider 8 to move downward through the fixed plate 7, causing the slider 8 to move downward along the first movable rod 9. Since the positioning plate 18 is already attached to the upper side of the part to be measured 1, the positioning plate 18 cannot move downward. The slider 8 moves downward and presses the first elastic member 11. After the first elastic member 11 stores force, it pushes the first connecting plate 10 downward and presses the second movable rod 12 downward. The second movable rod 12 drives the first piston 14, which is fixed to it, to move downward. The first piston 14 presses the hydraulic oil in the first housing 13. After being compressed, the hydraulic oil flows into the second housing 15.

[0053] Under the pressure of hydraulic oil, the second piston 16 moves outward along the second housing 15 (towards the side away from the first housing 13). The second piston 16 drives the sliding rod 17 fixed on it to slide along the second housing 15. The second elastic element 36 is compressed. The sliding rod 17 drives the positioning plate 18 to move through the connecting rod, so that the two positioning plates 18 move simultaneously to the sides away from each other until the positioning rod 19 is pressed into contact with the inside of the threaded hole.

[0054] As the detection body 2 moves downward, the first elastic element 11 is continuously compressed. Under the limiting action of the threaded hole of the part to be measured 1, the two positioning plates 18 stop moving to both sides, the second movable rod 12 stops moving downward, and the positioning rods 19 on both sides exert the same squeezing force on the threaded hole of the part to be measured 1. After the detection body 2 moves downward until it reaches the designated position, the measuring rod 5 is located on the central axis of the threaded hole of the part to be measured 1. By cooperating with the threaded hole of the part to be measured 1 through the positioning rod 19, the stability of the measuring device is improved, and the measurement accuracy of the threaded hole of the part to be measured 1 is improved.

[0055] Under pressure, the distance between the detection body 2 and the workpiece 1 to be measured remains constant. Then, pressing the button on the control panel 4 controls the moving component to work. The moving component moves the probe 5 and the probe 6. First, the probe 5 moves the probe 6 downward to a specified height, so that the probe 6 extends into the threaded hole. Then, the control panel 4 controls the moving component to work, so that the moving component moves the probe 6 to one side again, so that the probe 6 contacts the groove or tip of the threaded hole. Then, the control panel 4 controls the moving component to work again. The moving component moves the probe 6 downward to a specified height through the probe 5. During the downward movement of the probe 6, the threaded hole of the workpiece 1 to be measured is scanned in contact, and the scanned structure is uploaded to the processing terminal. The moving component is controlled by the buttons on the control panel 4, causing the probe 6 to move to the other side and contact the other side of the threaded hole. Then, driven by the moving component, it continues to move upward a certain distance. The moving component then drives the probe 5 and probe 6 back to their initial positions. The control terminal then calculates and measures the specific parameters of the threaded hole of the workpiece 1. The operation is simple and can accurately measure parameters such as the tooth profile and pitch of the threaded hole of the workpiece 1. The moving component is controlled by the control panel 4, causing the probe 5 and probe 6 to move upward and away from the workpiece 1.

[0056] After the measurement process is completed, the downward pressure on the detection body 2 is released. Under the elastic force of the two first elastic elements 11, the slider 8 moves upward along the first movable rod 9, and the detection body 2 moves upward accordingly until the detection body 2 is reset. Under the elastic force of the second elastic element 36, the second piston 16 drives the sliding rod 17 on it to reset. The sliding rod 17 drives the positioning plate 18 to move. The positioning plates 18 on both sides drive the positioning rods 19 on them to move towards each other, so that the positioning rods 19 are reset. At the same time, the first piston 14 drives the second movable rod 12 fixed on it to move upward and reset.

[0057] This embodiment achieves automatic positioning through the cooperation of the threaded hole positioning assembly with components such as the slider 8 and the fixing plate 7, ensuring that the measuring rod 5 is perpendicular to the workpiece 1 to be measured, thus avoiding misalignment between the measuring rod 5 and the threaded hole of the workpiece 1, which would reduce measurement accuracy. The measuring stylus 6 is used for contact scanning of the threaded hole of the workpiece 1, and the control terminal then calculates and obtains the specific parameters of the threaded hole. The operation is simple, and it can accurately measure parameters such as the thread profile and pitch of the threaded hole of the workpiece 1.

[0058] Example 2:

[0059] This embodiment provides a threaded hole measuring device with positioning function. Based on the first embodiment, a height positioning mechanism is added to limit the height of the detection body 2.

[0060] Specifically, such as Figure 6 and Figure 7 As shown, the height positioning mechanism includes a first mounting bracket 20, a limiting post 21, and an unlocking component. The first mounting bracket 20 is fixed to the outside of the slider 8, the limiting post 21 passes through the first mounting bracket 20, and the limiting post 21 is set perpendicular to the first movable rod 9. The slider 8 has a through hole for the limiting post 21 to pass through, and the axis of the through hole is also perpendicular to the first movable rod 9.

[0061] The limiting post 21 is located on the outside of the rod segment between the first mounting bracket 20 and the slider 8, and a third elastic element 22 is sleeved thereon; a first limiting hole 23 is opened at a set position at one end of the first movable rod 9 near the first connecting plate 10. When the first movable rod 9 moves to the point where the first limiting hole 23 corresponds to the limiting post 21, the limiting post 21 can extend into the first limiting hole 23 to limit the slider 8 and keep the first elastic element 11 in a compressed state.

[0062] In this embodiment, the third elastic element 22 is a spring.

[0063] The unlocking component is connected to the limiting post 21 and is used to control the extension and retraction of the limiting post 21. For example... Figure 7 As shown, the unlocking assembly includes a traction rope 26, a rotating wheel 27, a guide wheel 25, and a second mounting bracket 24. The second mounting bracket 24 is fixed to the first mounting bracket 20, and the traction rope 26, the rotating wheel 27, and the guide wheel 25 are mounted through the second mounting bracket 24.

[0064] In this embodiment, without affecting the normal movement of the detection body 2, the second mounting frame 24 is set as a gate-shaped structure, that is, the second mounting frame 24 includes a horizontal section and a vertical section connected to both ends of the horizontal section. The vertical section is connected to the corresponding first mounting frame 20, and the horizontal section is located above the detection body 2.

[0065] The limiting post 21 is located on the outside of the first mounting frame 20 and is connected to one end of the traction rope 26. A guide wheel 25 is rotatably mounted on the second mounting frame 24, which guides the traction rope 26. The other end of the traction rope 26 is connected to a rotating wheel 27. By rotating the rotating wheel 27, the length of the traction rope 26 is changed, thereby realizing the insertion and removal of the limiting post 21.

[0066] To prevent the traction rope 26 from deflecting, a buckle is set at regular intervals along the second mounting frame 24. The buckle only serves to limit the movement and does not affect the normal movement of the traction rope 26.

[0067] The working principle of this embodiment is as follows:

[0068] During the downward pressing of the detection body 2, the slider 8 drives the first mounting bracket 20 to move downward, and at the same time, the limiting post 21 slides downward along the corresponding second movable rod 12. At this time, the third elastic element 22 is in a compressed state. When the detection body 2 moves to the designated position, under the elastic force of the third elastic element 22, the limiting post 21 cooperates with the first limiting hole 23 to keep the position of the detection body 2 and the two second movable rods 12 stable, so as to avoid errors in the parameters scanned by the probe 6 due to the up and down shaking of the probe rod 5 and probe 6 caused by the detection body 2 driving the probe 6 to shake when measuring the threaded hole of the workpiece 1.

[0069] After the measurement is completed, rotate the wheel 27 to pull the traction rope 26. Under the guidance of the guide wheel 25, the traction rope 26 pulls the limiting post 21 outward. The third elastic element 22 is compressed again, and the limiting post 21 is dislodged from the first limiting hole 23, losing its limiting function. Under the elastic force of the two first elastic elements 11, the detection body 2 moves upward to reset. When the detection body 2 moves upward, the first mounting bracket 20 and the slider 8 drive the limiting post 21 to move upward until the detection body 2 is reset to the initial position and then the wheel 27 is released.

[0070] In this embodiment, the limiting post 21 and the first limiting hole 23 are used to keep the position of the detection body 2 and the two second movable rods 12 stable, so as to avoid the detection body 2 causing the probe 5 and probe 6 to shake up and down when measuring the threaded hole of the workpiece 1, which would cause errors in the parameters of the probe scanning.

[0071] Example 3:

[0072] This embodiment provides a threaded hole measuring device with positioning function. Based on embodiment two, an angle adjustment mechanism is added to change the swing angle of the detection body 2.

[0073] like Figure 7 and Figure 8 As shown, the angle adjustment mechanism includes a limiting rod 29, a fixing frame 28, and a fourth elastic element 30. The slider 8 has a through hole corresponding to the position of the groove in the fixing plate 7. The fixing frame 28 is connected to the upper surface of the slider 8 and is located on the side of the through hole away from the first movable rod 9. In this embodiment, the fixing frame 28 has an L-shaped structure.

[0074] One end of the limiting rod 29 passes through the fixing frame 28, and a limiting block is provided near the mating end of the limiting rod 19 with the fixing frame 28. A fourth elastic element 30 is provided between the limiting block and the fixing frame 28, and the fourth elastic element 30 is sleeved on the outside of the limiting rod 19. The other ends of the two limiting rods 29 are connected by a second connecting plate 31, which is located between the second mounting frame 24 and the top of the detection body 2.

[0075] In this embodiment, the fourth elastic element 30 is a spring.

[0076] Multiple second limiting holes 35 are evenly distributed in the groove of the fixing plate 7. For example, three second limiting holes 35 are provided, one of which is located in the middle of the arc-shaped groove. The limiting rod 21 passes through the through hole and the corresponding second limiting hole 35 on the slider 8 in sequence to limit the slider 8.

[0077] During the measurement of the threaded hole of the part to be measured 1, the probe 6 scans the left and right sides of the threaded hole of the part to be measured 1. After the scanning is completed, the second connecting plate 31 is pulled upward. The second connecting plate 31 drives the two limiting rods 29 to move upward. The limiting rods 29 move upward along the fixed frame 28, the fourth elastic element 30 is compressed, and the lower end of the limiting rod 29 moves out from the second limiting hole 35 in the middle of the fixed plate 7.

[0078] Then, the detection body 2 is rotated. The detection body 2 rotates along the slider 8 via the fixing plate 7. The detection body 2 drives the measuring rod 5 and the measuring needle 6 to rotate synchronously. During the rotation, the measuring rod 5 and the measuring needle 6 are always located on the central axis of the threaded hole of the workpiece 1 to be measured. When the detection body 2 swings to the specified angle, the through hole of the slider 8 corresponds to the adjacent second limiting hole 35 on the fixing plate 7. The second connecting plate 31 is released. Under the elastic force of the fourth elastic element 30, the limiting rod 29 is re-inserted into the second limiting hole 35 of the fixing plate 7, so that the detection body 2 and the two positioning plates 18 are placed at a certain angle. Then, the threaded hole of the workpiece 1 to be measured is measured again. Thus, the threaded hole of the workpiece 1 to be measured can be measured at different positions under one fixation, which improves the measurement accuracy of the threaded hole of the workpiece 1 to be measured.

[0079] After the measurement is completed, pull the second connecting plate 31 upward again, and then reset the detection body 2, keeping the detection body 2 and the two positioning plates 18 at a perpendicular angle for easy use next time.

[0080] Example 4:

[0081] This embodiment provides a threaded hole measuring device with positioning function. Based on embodiment three, an auxiliary limiting mechanism is added to limit the distance between the two positioning plates 18.

[0082] like Figure 4 As shown, the auxiliary limiting mechanism includes a friction plate 32 and a friction roller 34. The friction plate 32 is fixed to the bottom of the first mounting frame 20 and is vertically arranged. The friction roller 34 is located below the friction plate 32 and is mounted on one side of the second housing 15 via a support frame 33. The support frame 33 is fixedly connected to the second housing 15, and the friction roller 34 is rotatably connected to the support frame 33. When the friction plate 32 moves downward and contacts the corresponding friction roller 34, the friction roller 34 can rotate.

[0083] Friction plates are provided on the outer sides of both the friction plate 32 and the friction roller 34 to increase the friction between them and thus improve their stability.

[0084] The working principle of this embodiment is as follows:

[0085] During the downward pressing of the detection body 2, the first mounting bracket 20 drives the friction plate 32 connected to it to move downward. When the friction plate 32 contacts the friction roller 34, the friction roller 34 rotates. When the detection body 2 moves downward to the designated position, the friction plate 32 stops moving downward. The friction force makes the friction plate 32 cooperate with the friction roller 34. The friction plate 32 cannot slide back and forth along the friction roller 34, thereby avoiding the change in the position of the first housing 13 and the positioning plate 18 after the detection body 2 is subjected to external force, which would cause the position of the probe 6 in the threaded hole of the workpiece 1 to change, thereby improving the measurement accuracy of the threaded hole of the workpiece 1.

[0086] Example 5:

[0087] This embodiment provides a threaded hole measurement method with positioning function, using the measuring device described in Embodiment 4, and includes the following steps:

[0088] Step 1: Hold the testing body 2 and move it to the upper side of the part to be measured 1. Place the two positioning plates 18 on the upper side of the part to be measured 1 and insert the positioning rod 19 into the threaded hole of the part to be measured 1.

[0089] Step 2: Press down on the detection body 2 until the detection body 2 moves down to the designated position, and the limiting post 21 engages with the first limiting hole 23.

[0090] Step 3: Control the moving component through the control panel 4 to measure the threaded hole of the part to be measured 1.

[0091] Step 4: Pull the second connecting plate 31 upward to release the limiting rod 29 from the limiting plate 7 and the slider 8; rotate the detection body 2 to the specified angle, and limit the limiting rod 29 to limit the fixed plate 7 and the slider 8 again, and repeat step 3.

[0092] Step 5: Rotate the rotating wheel 27 to release the limiting post 21 from the first limiting hole 23, so that the detection body 2 is reset. At the same time, control the second connecting plate 31 to restore the fixing plate 7 and the detection body 2 to the initial swing angle.

[0093] Step 6: After completing the measurement of the threaded hole of the workpiece 1, move the measuring device away from the workpiece 1.

[0094] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A threaded hole measuring device with positioning function, characterized in that, The device includes a detection body with a probe installed. Fixed plates are symmetrically installed on both sides of the detection body, and the fixed plates are slidably connected to a slider. The slider is passed through by a first movable rod, and a first elastic element is sleeved on the outside of the first movable rod. The first movable rod is connected to a threaded hole positioning assembly. The threaded hole positioning assembly has a positioning rod, which is used to move the positioning rod to fit against the inner wall of the threaded hole during the pressing of the detection body. The threaded hole positioning assembly includes a vertical piston assembly, a horizontal piston assembly, and a positioning plate. The positioning rod is vertically fixed to one end of the positioning plate, and the other end of the positioning plate is connected to the vertical piston assembly through the horizontal piston assembly. The vertical piston assembly is slidably connected to the positioning plate, and the vertical piston assembly and the horizontal piston assembly have a communicating cavity filled with hydraulic oil. The vertical piston assembly includes a second movable rod, one end of which is connected to the first movable rod via a first connecting plate, and the other end of which is slidably disposed within the first housing via a first piston; the horizontal piston assembly includes a second housing that communicates with the first housing, and a sliding rod is provided inside the second housing. The sliding rod cooperates with the second housing via a second piston, and a second elastic element is sleeved on the outside of the sliding rod, with one end of the sliding rod extending out of the second housing connected to a positioning plate.

2. The threaded hole measuring device with positioning function according to claim 1, characterized in that, The fixing plate is set perpendicular to the pressing direction of the detection body, and the upper surface of the fixing plate is provided with an arc-shaped groove for the movement of the slider.

3. A threaded hole measuring device with positioning function according to claim 1 or 2, characterized in that, It also includes a height positioning mechanism, which includes a limiting post that extends and retracts relative to the slider, and a first limiting hole is provided at the set height of the first movable rod; one end of the limiting post is connected to the unlocking component, and the other end is used to cooperate with the first limiting hole.

4. A threaded hole measuring device with positioning function according to claim 3, characterized in that, The slider is fixed with a first mounting bracket on the side away from the fixed plate. The limiting post passes through the first mounting bracket and the slider in sequence, and the portion of the limiting post located between the first mounting bracket and the slider is fitted with a third elastic element to extend and retract relative to the slider.

5. A threaded hole measuring device with positioning function according to claim 3, characterized in that, The unlocking assembly includes a guide wheel and a rotating wheel mounted on the second mounting bracket. The limiting post is connected to one end of the traction rope, and the traction rope is connected to the rotating wheel after passing through the guide wheel.

6. A threaded hole measuring device with positioning function according to claim 3, characterized in that, It also includes an angle adjustment mechanism, which includes a limiting rod that engages with the slider. The fixing plate has multiple second limiting holes that can engage with the limiting rod. A fourth elastic element is installed at the end of the limiting rod that engages with the slider. The two limit rods are connected by a second connecting plate.

7. A threaded hole measuring device with positioning function according to claim 6, characterized in that, It also includes an auxiliary limiting mechanism, which includes a friction plate and a friction roller. The friction plate can move up and down with the slider, and the friction roller is located below the friction plate and can rotate when the two are in contact.

8. A method for measuring threaded holes with positioning function, characterized in that, The measuring device as described in claim 7 includes: Move the detection body so that the positioning plate fits against the upper side of the workpiece to be measured, and insert the positioning rod into the threaded hole of the workpiece to be measured; Press down on the testing body until the limiting post mates with the first limiting hole; measure the threaded hole using a measuring pin. Pull the second connecting plate upward to release the limiting rod from the limiting plate and the slider; rotate the detection body to the set angle, and use the limiting rod to limit the fixed plate and the slider again, and repeat the measurement steps; Rotate the wheel to release the limiting post from the first limiting hole, reset the detection body, and simultaneously control the second connecting plate to restore the fixing plate and the detection body to their initial swing angle.

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