Inner diameter measuring device with measuring head with contraction and expansion functions

Abstract

The utility model relates to an inner diameter measuring device with a measuring head with a contraction and expansion function, which comprises a measuring head body, and a plurality of limiting grooves are arranged on a measuring head seat of the measuring head body. Each measuring rod comprises a swing rod, one end of the swing rod is a first contact part, the first contact part corresponds to the hole wall of the to-be-measured hole, the other end of the swing rod is a second contact part, the middle part of the swing rod is provided with a hinge part, and the hinge part is located in the limiting groove; the friction supporting element is mounted on the hinging part; the rotating shafts are mounted on the measuring head seat, the number of the rotating shafts is consistent with that of the limiting grooves, and the rotating shafts are connected with the friction supporting element, so that the hinging part is hinged to the measuring head seat, and stable gaps are kept between the two sides of the hinging part and the limiting grooves; after the second contact part is stressed, the swing rod swings with the rotating shaft as the center, and after the first contact part makes contact with the hole wall of the to-be-measured hole, measurement is carried out, so that it is ensured that the measuring rod swings smoothly, and the inner diameter measuring device can be used in a workshop environment with many pollutants.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aperture measurement, especially an inner diameter measuring device with a measuring head with a retracting function. BACKGROUND

[0002] At present, the measuring device for measuring inner diameter mostly adopts a measuring head with a lever structure, and multiple measuring rods constitute the measuring head, wherein the number of measuring rods is arranged according to the measurement requirement, in order to ensure the accuracy of the measurement result, the measuring rods need to be limited in position, so that the measuring rods can only swing in one degree of freedom direction, thereby improving the measurement precision of the measuring device.

[0003] In the prior art, a limiting groove in contact with both sides of the measuring rod is usually adopted, so that the measuring rod slides relative to the groove wall of the limiting groove during swinging, thereby achieving the limiting of both sides of the measuring rod and the guidance of the swinging direction.

[0004] However, the above-mentioned measuring structure can only meet the measurement in a laboratory environment, and in the online measurement environment of parts in a production workshop, since there are many pollutants in the holes of the parts and the workshop environment, the pollutants are easy to enter the limiting groove, thereby affecting the effective swinging of the measuring rod and the normal use of the measuring device. UTILITY MODEL CONTENT

[0005] In view of the above-mentioned shortcomings in the prior production technology, the present application provides an inner diameter measuring device with a measuring head with a retracting function, so as to ensure smooth swinging of the measuring rod and enable the inner diameter measuring device to be used in a workshop environment with many pollutants.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] An inner diameter measuring device with a measuring head with a retracting function, comprising

[0008] A measuring head body, the measuring head body comprising a main body structure and a measuring head seat at the end of the main body structure, and a plurality of limiting grooves are arranged on the measuring head seat;

[0009] Measuring rods, the number of which is multiple and corresponds to the limiting grooves one by one, each measuring rod comprising a swinging rod, one end of the swinging rod being a first contact part corresponding to the hole wall of the hole to be measured, the other end of the swinging rod being a second contact part, and a hinge part being arranged in the middle of the swinging rod, the hinge part being located in the limiting groove;

[0010] A friction supporting element is installed on the hinge part;

[0011] A rotating shaft is installed on the measuring head base, the number of the rotating shafts is consistent with the number of the limiting grooves, the rotating shafts are connected with the friction supporting elements, the articulated part is articulated with the measuring head base, and stable gaps are kept between the two sides of the articulated part and the limiting grooves.

[0012] The inner diameter measuring device converts the displacement data of the second contact part into the hole diameter data of the hole to be measured.

[0013] As a further improvement of the above technical solution:

[0014] The articulated part is provided with an articulated hole, the friction supporting element is installed in the articulated hole, the friction supporting element comprises a bearing, the middle part of the rotating shaft is connected with the inner ring of the bearing, and the two ends of the rotating shaft are connected with the measuring head base.

[0015] The measuring head base is provided with a shaft hole which penetrates the limiting groove and the measuring head base at the same time, and the rotating shaft is slidingly installed in the shaft hole.

[0016] The distance between the two side walls of the limiting groove in the axial direction of the rotating shaft is greater than the thickness of the friction supporting element in the axial direction of the rotating shaft.

[0017] The measuring head base is provided with a limiting part, the end of the limiting part is connected with the rotating shaft, the axial position of the rotating shaft in the shaft hole is adjusted, and then the position of the measuring rod in the limiting groove is changed by moving the friction supporting element.

[0018] The two ends of each rotating shaft are provided with a first inclined surface, the measuring head base is provided with two adjusting holes which penetrate the same shaft hole, the two adjusting holes are located on the two sides of the limiting groove respectively, the limiting part is installed in each adjusting hole, and the limiting part is provided with a second inclined surface which is in contact with the first inclined surface.

[0019] The position of the limiting part in the adjusting hole is adjusted, the relative position of the second inclined surface and the second inclined surface is changed, and then the axial position of the rotating shaft in the shaft hole is changed.

[0020] Each rotating shaft comprises a first rotating shaft and a second rotating shaft, and the first rotating shaft and the second rotating shaft are coaxial and are located on the two sides of the articulated part respectively.

[0021] The first rotating shaft and the second rotating shaft are the same in structure, one end of the first rotating shaft is provided with a conical surface matched with the inner ring of the bearing, and the other end of the first rotating shaft is provided with the first inclined surface.

[0022] The bearing is a flange bearing, the number of the bearing is two, and the two bearings are respectively installed at two ends of the hinge hole and correspond to the first rotating shaft and the second rotating shaft.

[0023] The limiting piece comprises a pin shaft and a jack screw threadedly connected with the adjusting hole, one end of the pin shaft is provided with the first inclined surface, the other end of the pin shaft is in contact with the jack screw, and the two jack screws corresponding to one rotating shaft are located on the same side of the rotating shaft.

[0024] The end of the measuring head seat is provided with a guide head, the guide head is provided with a containing cavity, the containing cavity is communicated with the limiting groove, when the internal diameter measuring device is in a non-measuring state, a plurality of measuring rods are located in the containing cavity and are in clearance fit with the containing cavity, and the guide head is used for guiding the first contact part to enter the hole to be measured.

[0025] The middle part of the measuring head body is provided with a blowing channel, and the containing cavity and the limiting groove are communicated with the blowing channel.

[0026] The displacement sensor is installed on the main body structure, and the displacement sensor is used for measuring the displacement of the second contact part.

[0027] The internal diameter measuring device has the following beneficial effects:

[0028] The internal diameter measuring device has the following beneficial effects:

[0029] The internal diameter measuring device has the following beneficial effects:

[0030] (1) The friction supporting element comprises a bearing, the bearing is arranged in the hinge hole of the hinge part, and the hinge part is more flexible in rotation relative to the rotating shaft.

[0031] (2) The rotating shaft is slidably installed in the shaft hole, and the friction supporting element has a movable gap in the limiting groove, the position of the rotating shaft is adjusted by the limiting piece, the position of the measuring rod in the limiting groove is changed by moving the friction supporting element, the relative positions of the plurality of first contact parts are adjusted, the relative positions of the plurality of first contact parts meet the measurement requirements, the machining precision requirement is reduced, the measurement precision of the internal diameter measuring device is improved, and the performance of the measuring device is stable.

[0032] (3) The limiting groove has a space for the hinged part to move along the rotating shaft in the axial direction, and the two limiting pieces are respectively in contact with the two ends of the rotating shaft through inclined surfaces, the limiting position of the two ends of the rotating shaft is changed by changing the position of the limiting piece in the adjusting hole, and then the position of the measuring rod in the limiting groove is adjusted, so that the structure is simple and the operation is convenient.

[0033] (4) The segmented rotating shaft is matched with the inner ring of the bearing through the conical surface from the two sides of the hinged part, the hinged part is limited in the axial and radial directions, and the assembly of the rotating shaft and the friction supporting element is facilitated.

[0034] (5) The accommodating cavity with the first contact part is arranged on the measuring head base, the accommodating cavity is communicated with the limiting groove, the blowing channel communicated with the accommodating cavity and the limiting groove is arranged in the measuring head body, the hole wall of the measured hole and foreign matters on the measuring rod can be removed, and the accuracy of the measurement process is further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a structural schematic view of the utility model.

[0036] Figure 2 It is an explosion view of the utility model.

[0037] Figure 3 It is Figure 2 It is a partial square view of A.

[0038] Figure 4 It is a sectional view of the utility model.

[0039] Figure 5 It is Figure 4 It is a sectional view of B-B section.

[0040] Figure 6 It is a structural schematic view of the measuring head base of the utility model.

[0041] Figure 7 It is a structural schematic view of the measuring rod of the utility model.

[0042] Figure 8 It is an explosion view of the measuring rod of the utility model.

[0043] Among them:

[0044] 1, the measuring head body;

[0045] 11, the measuring head base; 111, the limiting groove; 112, the guide head; 113, the adjusting hole; 114, the shaft hole;

[0046] 12, the main body structure; 121, the blowing channel;

[0047] 2, the measuring rod;

[0048] 21. Swing rod; 211. First contact part; 212. Second contact part; 213. Spherical protrusion; 22. Hinge part;

[0049] 3. Displacement sensor; 31. Contact; 32. Clamp;

[0050] 4. Limiting component; 41. Second inclined surface; 42. Pin; 43. Set screw;

[0051] 5. Friction support element; 6. Rotating shaft; 601. First rotating shaft; 602. Second rotating shaft; 61. First inclined surface; 62. Conical surface;

[0052] 7. Elastic components. Detailed Implementation

[0053] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0054] Example 1:

[0055] like Figures 1-6 As shown, the inner diameter measuring device with a telescope having a telescope opening and closing function in this embodiment includes a probe body 1, a measuring rod 2, a friction support element 5, and a rotating shaft 6.

[0056] The probe body 1 includes a main structure 12 and a probe seat 11 located at the end of the main structure 12. The probe seat 11 is provided with a plurality of limiting grooves 111.

[0057] There are multiple measuring rods 2, each corresponding to a limiting groove 111. Each measuring rod 2 includes a swing rod 21. One end of the swing rod 21 is a first contact part 211, which corresponds to the hole wall of the hole to be measured. The other end of the swing rod 21 is a second contact part 212. A hinge part 22 is provided in the middle of the swing rod 21, and the hinge part 22 is located in the limiting groove 111.

[0058] Friction support element 5 is mounted on hinge part 22;

[0059] Rotating shaft 6 is mounted on probe seat 11. The number of rotating shafts 6 is the same as the number of limiting grooves 111. Rotating shaft 6 is connected to friction support element 5 so that hinge part 22 is hinged to probe seat 11 and a stable gap is maintained between the two sides of hinge part 22 and limiting groove 111.

[0060] When the second contact part 212 is subjected to force, the swing rod 21 swings around the rotation shaft 6. After the first contact part 211 contacts the hole wall of the hole to be measured, the inner diameter measuring device converts the displacement data of the second contact part 212 into the hole diameter data of the hole to be measured.

[0061] The measuring rod 2 is connected with the rotating shaft 6 installed on the measuring head base 11 through the friction supporting element 5, the friction supporting element 5 hingedly connects the measuring rod 2 with the measuring head base 11, and simultaneously plays a role of supporting and fixing the measuring rod 2 from the radial direction of the rotating shaft 6 and limiting the measuring rod 2 in the axial direction, realizes clearance fit between the hinged part 22 and the limiting groove 111, avoids the measuring rod 2 being polluted by the environment and contacting with the limiting groove 111, thereby ensuring smooth swing of the measuring rod 2, and enabling the inner diameter measuring device to be used in a workshop environment with more pollutants.

[0062] As shown in Figure 5 , the hinged part 22 is provided with a hinged hole, and the friction supporting element 5 is installed in the hinged hole, the friction supporting element 5 includes a bearing, the middle part of the rotating shaft 6 is connected with the inner ring of the bearing, and the two ends of the rotating shaft 6 are connected with the measuring head base 11.

[0063] Specifically, the outer ring of the bearing is connected with the hinged hole, and the friction supporting element 5 includes a bearing, by arranging the bearing in the hinged hole of the hinged part 22, the rotation of the hinged part 22 relative to the rotating shaft 6 is more flexible.

[0064] As shown in Figures 1-4 , the inner diameter measuring device with the measuring head having the function of collecting and stretching of the embodiment further includes a plurality of displacement sensors 3 corresponding to the measuring rod 2 one by one, the displacement sensors 3 are installed on the main body structure 12, and the displacement sensors 3 are used for measuring the displacement of the second contact part 212.

[0065] The displacement sensor 3 is a pneumatic pen type displacement sensor, which is used for driving the swing rod 21 to swing while measuring the displacement of the second contact part 212, so that the inner diameter measuring device is in a measuring state.

[0066] As shown in Figures 1-4 , the main body structure 12 and the measuring head base 11 are detachably connected, and further include an elastic element 7 in a compressed state, the elastic element 7 elastically connects the measuring rod 2 with the measuring head base 11, so that the second contact part 212 is in contact connection with the contact 31 of the displacement sensor 3, and meanwhile the plurality of first contact parts 211 have a tendency of approaching each other. Specifically, the elastic element 7 can be a spring plunger or a spring. One end of the elastic element 7 abuts against the measuring head base 11, and the other end of the elastic element 7 abuts against the second contact part 212.

[0067] As shown in Figure 4 , the main body structure 12 is provided with a clamp 32 for installing the displacement sensor 3, the displacement sensor 3 is arranged inside the clamp 32 and embedded in the main body structure 12, the displacement sensor 3 is fixed and loosened by locking and loosening the clamp 32 through a fastener, thereby facilitating up and down adjustment of the displacement sensor 3.

[0068] As shown in Figure 4As shown, the plurality of first contact portions 211 are close to each other when the inner diameter measuring device is in the non-measuring state; after the pneumatic pen displacement sensor contact 31 drives the swing rod 21 to swing, the plurality of first contact portions 211 are away from each other and contact the hole wall, and the inner diameter measuring device is in the measuring state.

[0069] The number of measuring rods 2 is arranged according to the measurement requirement; when the number of measuring rods 2 is two, the measuring rods 2 are distributed along a radial direction of a circle, and the hole diameter can be measured; when the number of measuring rods 2 is four, the measuring rods 2 are distributed along a circumferential direction of a circle, and the hole diameter and the position degree of the hole can be measured.

[0070] As shown in Figure 7 , Figure 8 , the swing rod 21 intersects with the axis of the hinge portion 22 and is in T shape, the second contact portion 212 is in rod shape, the second contact portion 212 intersects with the axis of the swing rod 21 and is in L shape, and the hinge portion 22 is staggered with the second contact portion 212.

[0071] The second contact portion 212 and the hinge portion 22 are staggered on the swing rod 21 of the measuring rod 2, so that the spacing between the swing rods 21 can be further reduced, the contact position of the second contact portion 212 and the contact 31 is extended outward, and a plurality of measuring rods 2 can be arranged in a narrow space to adapt to the measurement of a small hole diameter, and the selection and installation of a plurality of displacement sensors 3 are facilitated.

[0072] As shown in Figure 7 , the second contact portion 212 is provided with a spherical protruding portion 213, and the spherical protruding portion 213 is in contact with the contact 31. When the swing rod 21 swings, the second contact portion 212 is in smooth contact with the contact 31.

[0073] Embodiment Two:

[0074] On the basis of Embodiment One, the inner diameter measuring device with a measuring head having a stretching function of the present embodiment is provided with an axis hole 114 which penetrates the limiting groove 111 and the measuring head seat 11 at the same time, and the rotating shaft 6 is slidingly installed in the axis hole 114.

[0075] The spacing between the two side walls of the limiting groove 111 in the axial direction of the rotating shaft 6 is greater than the thickness of the friction support element 5 in the axial direction of the rotating shaft 6.

[0076] The limiting part 4 is installed on the measuring head seat 11, the end of the limiting part 4 is connected with the rotating shaft 6, and is used for adjusting the axial position of the rotating shaft 6 in the axis hole 114, so as to change the position of the measuring rod 2 in the limiting groove 111 by moving the friction support element 5.

[0077] The rotating shaft 6 and the axis hole 114 are matched in size, the axis hole 114 plays a radial limiting role on the rotating shaft 6, and the limiting part 4 plays an axial limiting role on the rotating shaft 6.

[0078] The inner diameter measuring device with the measuring head having the function of collecting tension in the embodiment keeps a stable gap between the two sides of the hinged part 22 and the limiting groove 111 under the connecting action of the friction supporting element 5, and through the sliding installation of the rotating shaft 6 in the shaft hole 114 and the leaving of the movable gap of the friction supporting element 5 in the limiting groove 111, the position of the rotating shaft 6 is adjusted by the limiting part 4, the position of the measuring rod 2 in the limiting groove 111 is changed by moving the friction supporting element 5, the adjustment of the relative positions of the plurality of first contact parts 211 is realized, the relative positions of the plurality of first contact parts 211 meet the measurement requirements, the machining precision requirement can be reduced, the measurement precision of the inner diameter measuring device is improved, and the stable performance of the measuring device is ensured. In the adjustment process, the annular gauge is used for auxiliary measurement.

[0079] As shown in Figures 5-8 , the first inclined surface 61 is arranged at each end of the rotating shaft 6, the adjusting hole 113 is arranged on the measuring head seat 11 and penetrates the same shaft hole 114, the two adjusting holes 113 are respectively located on the two sides of the limiting groove 111, the limiting part 4 is arranged in each adjusting hole 113, and the second inclined surface 41 is arranged on the limiting part 4 and in contact with the first inclined surface 61.

[0080] The position of the limiting part 4 in the adjusting hole 113 is adjusted, the relative positions of the second inclined surface 41 and the first inclined surface 61 are changed, and then the axial position of the rotating shaft 6 in the shaft hole 114 is changed.

[0081] The limiting groove 111 has a space for moving the hinged part 22 along the axial direction of the rotating shaft 6, the two limiting parts 4 are respectively in contact with the two ends of the rotating shaft 6 through the inclined surface, the position of the limiting part 4 in the adjusting hole 113 is changed, the limiting position of the two ends of the rotating shaft 6 is changed, and then the position of the measuring rod 2 in the limiting groove 111 is adjusted, and the structure is simple and the operation is convenient.

[0082] As shown in Figure 5 , for the case that the measuring rod 2 is four, the axial direction of the adjusting hole 113 and the shaft hole 114 is perpendicular, the rotating shaft 6 is four and forms a rectangular structure, and one limiting part 4 of the adjacent two measuring rods 2 is located at one top corner of the rectangle. The installation mode of the limiting part 4 not only avoids each other, but also facilitates the synchronous adjustment of the limiting parts 4 at the two ends of the rotating shaft 6.

[0083] As shown in Figure 3 , Figure 5 , the limiting part 4 includes the pin shaft 42 and the top screw 43 which is in threaded connection with the adjusting hole 113, one end of the pin shaft 42 is provided with the second inclined surface 41, the other end of the pin shaft 42 is in contact with the top screw 43, and the two top screws 43 corresponding to one rotating shaft 6 are located on the same side of the rotating shaft 6.

[0084] Embodiment three:

[0085] On the basis of embodiments one and two, the inner diameter measuring device with the collecting and stretching function measuring head of the present embodiment, each rotating shaft 6 comprises a first rotating shaft 601 and a second rotating shaft 602, the first rotating shaft 601 and the second rotating shaft 602 are coaxial and are respectively located on both sides of the hinged part 22;

[0086] The first rotating shaft 601 and the second rotating shaft 602 are the same in structure, one end of the first rotating shaft 601 is provided with a tapered surface 62 matched with the inner ring of the bearing, and the other end of the first rotating shaft 601 is provided with a first inclined surface 61.

[0087] The bearing is a flange bearing, and the number of bearings is two, and the two bearings are respectively installed at both ends of the hinged hole, and the two bearings correspond to the first rotating shaft 601 and the second rotating shaft 602 respectively.

[0088] The bearing is a flange bearing, which is convenient for axial installation and positioning.

[0089] The end of the first rotating shaft 601 and the second rotating shaft 602 is provided with a tapered surface 62 matched with the inner ring of the bearing, so that the segmented rotating shaft 6 limits the hinged part 22 from both sides of the hinged part 22 in the axial and radial directions, and the assembly of the rotating shaft 6 and the friction supporting element 5 is facilitated.

[0090] Embodiment four:

[0091] On the basis of the above embodiments, the inner diameter measuring device with the collecting and stretching function measuring head of the present embodiment, the end center of the measuring head seat 11 is provided with a guide head 112, the guide head 112 is provided with a containing cavity, the containing cavity is communicated with the limiting groove 111, and when the inner diameter measuring device is in a non-measuring state, a plurality of measuring rods 2 are located in the containing cavity and are in clearance fit with the containing cavity, and the guide head 112 is used for guiding the first contact part 211 to enter the hole to be measured.

[0092] The middle part of the measuring head body 1 is provided with a blowing channel 121, and the containing cavity and the limiting groove 111 are communicated with the blowing channel 121.

[0093] The clearance fit between the measuring rod 2 and the containing cavity means that there is a gap between the measuring rod 2 and the containing cavity, and they do not contact each other, and in the non-measuring state, the first contact part 211 of the measuring rod 2 is embedded in the containing cavity.

[0094] The use method of the inner diameter measuring device with the collecting and stretching function measuring head of the present embodiment is as follows:

[0095] When not measuring, the elastic member 7 applies a pressure to the second contact part 212 towards the contact 31, so that the swing rod 21 swings and approaches each other, and the first contact part 211 is located in the containing cavity on the guide head 112, which is convenient for the measuring head to enter the hole;

[0096] When measurement is needed, the guide head 112 is inserted into the hole to be measured, the electromagnetic valve control contact 31 of the displacement sensor 3 is ejected to make the first contact part 211 on the swing rod 21 swing out and contact the hole wall, thereby reading the value;

[0097] Before measurement, through electromagnetic valve control, compressed air is introduced into the blowing channel 121 through the air pipe, so that the compressed air enters the containing cavity and the limiting groove 111 from the blowing channel 121, and removes the foreign matters and a small amount of water on the hole wall and the measuring rod 2.

[0098] By setting the containing cavity containing the first contact part 211 on the measuring head seat 11, the containing cavity is communicated with the limiting groove 111, and the blowing channel 121 communicating the containing cavity and the limiting groove 111 is arranged in the measuring head body 1, the removal of the foreign matters on the hole wall of the hole to be measured and the measuring rod 2 can be realized, and the accuracy of the measurement process is further ensured.

[0099] The above description is an explanation of the utility model, not a limitation of the utility model, the range defined by the utility model is referred to the claims, and any form of modification can be made within the protection range of the utility model.

Claims

1. An internal diameter measuring apparatus having a retractor probe, characterized by: The utility model relates to a kind of inner diameter measuring device, including Measuring head body (1), the measuring head body (1) includes main body structure (12) and the measuring head seat (11) at the end of main body structure (12), a plurality of limiting grooves (111) are provided on the measuring head seat (11); Measuring rod (2), multiple and corresponding with limiting groove (111), each measuring rod (2) includes swing lever (21), one end of the swing lever (21) is first contact part (211), the first contact part (211) corresponds the hole wall of hole to be measured, the other end of the swing lever (21) is second contact part (212), hinged part (22) is provided in the middle of the swing lever (21), and the hinged part (22) is located in the limiting groove (111); Friction support element (5) is installed on the hinged part (22); Rotating shaft (6), the rotating shaft (6) is installed on the measuring head seat (11), the number of the rotating shaft (6) is consistent with the number of the limiting groove (111), the rotating shaft (6) is connected with friction support element (5), so that the hinged part (22) is hinged with the measuring head seat (11), and the both sides of the hinged part (22) keep the stable gap between the limiting groove (111); Wherein, after the second contact part (212) is stressed, the swing lever (21) swings with the rotating shaft (6) as center, after the first contact part (211) contacts the hole wall of hole to be measured, the inner diameter measuring device converts the displacement data of second contact part (212) into the hole diameter data of hole to be measured.

2. The ID measuring device with a collecting function probe according to claim 1, characterized in that: The hinged hole is provided on the hinged part (22), the friction support element (5) is installed in the hinged hole, the friction support element (5) includes bearing, the middle part of the rotating shaft (6) is connected with the inner ring of the bearing, and the both ends of the rotating shaft (6) are connected with the measuring head seat (11).

3. The ID measuring apparatus having a collecting function probe according to claim 2, wherein: The shaft hole (114) that simultaneously penetrates the limiting groove (111) and the measuring head seat (11) is provided on the measuring head seat (11), and the rotating shaft (6) is slidably installed in the shaft hole (114); The spacing between the two side walls of the limiting groove (111) in the axial direction of the rotating shaft (6) is greater than the thickness of the friction support element (5) in the axial direction of the rotating shaft (6); The limiting part (4) is installed on the measuring head seat (11), the end of the limiting part (4) is connected with the rotating shaft (6), for adjusting the axial position of the rotating shaft (6) in the shaft hole (114), and then changing the position of the measuring rod (2) in the limiting groove (111) by moving the friction support element (5).

4. The ID measuring apparatus having a collecting function probe according to claim 3, wherein: The first inclined surface (61) is provided on the both ends of each rotating shaft (6), the two adjusting holes (113) that pass through the same shaft hole (114) are provided on the measuring head seat (11), and the two adjusting holes (113) are located on the both sides of the limiting groove (111) respectively, the limiting part (4) is installed in each adjusting hole (113), the second inclined surface (41) that contacts and cooperates with the first inclined surface (61) is provided on the limiting part (4). The position of the limiting member (4) in the adjusting hole (113) is adjusted, the relative position of the second inclined surface (41) and the second inclined surface (41) is changed, and then the axial position of the rotating shaft (6) in the shaft hole (114) is changed.

5. The ID measuring apparatus having a collecting function probe according to claim 4, wherein: Each rotating shaft (6) comprises a first rotating shaft (601) and a second rotating shaft (602), which are coaxial and located on both sides of the hinge part (22) respectively. The first rotating shaft (601) and the second rotating shaft (602) are the same in structure, one end of the first rotating shaft (601) is provided with a conical surface (62) matched with the inner ring of the bearing, and the other end of the first rotating shaft (601) is provided with the first inclined surface (61).

6. The ID measuring apparatus having a collecting function probe according to claim 5, wherein: The bearing is a flange bearing, and the number of bearings is two, two bearings are respectively installed at both ends of the hinge hole, and the two bearings correspond to the first rotating shaft (601) and the second rotating shaft (602) respectively.

7. The ID measuring apparatus having a collecting function probe according to claim 4, wherein: The limiting member (4) comprises a pin shaft (42) and a jack screw (43) threadedly connected with the adjusting hole (113), one end of the pin shaft (42) is provided with the first inclined surface (61), the other end of the pin shaft (42) is in contact with the jack screw (43), and two jack screws (43) corresponding to one rotating shaft (6) are located on the same side of the rotating shaft (6).

8. The ID measuring apparatus having a collecting function probe according to claim 1, wherein: A guide head (112) is arranged at the center of the end of the measuring head seat (11), the guide head (112) is provided with a containing cavity, the containing cavity is communicated with the limiting groove (111), when the internal diameter measuring device is in a non-measuring state, a plurality of measuring rods (2) are located in the containing cavity and are in clearance fit with the containing cavity, and the guide head (112) is used for guiding the first contact part (211) to enter the hole to be measured.

9. The ID measuring apparatus having a collecting function probe according to claim 8, wherein: A blowing channel (121) is arranged in the middle of the measuring head body (1), and the containing cavity and the limiting groove (111) are communicated with the blowing channel (121).

10. The ID measuring apparatus having a collecting function probe according to claim 1, wherein: A displacement sensor (3) is further included, the number of displacement sensors (3) is multiple and corresponds to the measuring rods (2) one by one, the displacement sensor (3) is installed on the main body structure (12), and the displacement sensor (3) is used for measuring the displacement of the second contact part (212).

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