Internal and external diameter comparison measuring instrument

Abstract

The utility model discloses an internal and external diameter comparison measuring instrument, which is characterized in that a first measuring head capable of extending out of a first plane is arranged at the bottom of a first mounting frame, and a second measuring head capable of extending out of the bottom of a base is arranged at the bottom of a second mounting frame; the first knob is connected with the first mounting frame and can control the locking or loosening state of the first mounting frame, and when the first knob controls the first mounting frame to be in the loosening state, the first knob can drive the first measuring head to move in the direction close to or away from the second measuring head; the second knob is connected with the second mounting frame and can drive the second measuring head to move along the length direction of the base; the measuring tool comprises a gauge head and a measuring rod capable of penetrating through the gauge head, the internal and external diameter comparison measuring instrument provided by the utility model has the advantages that different measuring heads can be replaced to measure internal diameters or external diameters of different workpieces, the application occasion is expanded, various different sizes can be conveniently measured, the measuring precision is higher, and most measuring requirements are met; an extension rod can be arranged to enlarge the measurement range.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring equipment, and in particular relates to an inner and outer diameter comparison measuring instrument. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] At present, conventional inner diameter or outer diameter measuring tools are basically single-function, that is, a single measuring tool can only measure a few corresponding dimensions. Conventional caliper measurement is easy to use but the measurement accuracy is not high; inside diameter micrometer or inside diameter gauge has high measurement accuracy but the measurement application scenario is single; various customized inside diameter or outside diameter measuring tools have high customization prices and are only applicable to the corresponding measured dimensions.

[0004] To measure all the internal or external dimensions of a conventional workpiece, it is necessary to use multiple testing gauges or even customize special testing gauges according to the dimensions to be measured.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the utility model and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the utility model. Utility Model Content

[0006] In order to overcome the defects in the prior art, the utility model provides an inner and outer diameter comparison measuring instrument, which can measure the inner diameter or outer diameter size of different types of workpieces by replacing the measuring head.

[0007] The utility model discloses an inner and outer diameter comparison measuring instrument, which is used to measure the inner diameter or outer diameter size of a workpiece, and comprises:

[0008] A base, the base having a hollow cavity, the plane where the bottom of the base is located is a first plane, and the front side plate of the base is provided with a second slide groove;

[0009] A first mounting frame and a second mounting frame, wherein the first mounting frame and the second mounting frame are arranged side by side in a direction perpendicular to the first plane, a first probe capable of extending out of the first plane is provided at the bottom of the first mounting frame, and a second probe capable of extending out of the bottom of the base is provided at the bottom of the second mounting frame;

[0010] A first knob, which is disposed on the top of the first mounting frame, and can control the locking or releasing state of the first mounting frame. When the first knob controls the first mounting frame to be in the releasing state, the first knob can drive the first probe to move in a direction close to or away from the second probe;

[0011] A second knob, the second knob is embedded in the second slide groove, the second knob is connected to the second mounting bracket and the second knob can drive the second probe to move along the length direction of the base;

[0012] An elastic member, wherein the elastic member is arranged at the bottom of the second mounting frame, and when the elastic member is in a relaxed state, the second mounting frame moves in a direction away from the first mounting frame under the elastic force, and the measuring instrument measures the inner diameter of the workpiece; when the elastic member is in a relaxed state, the second mounting frame moves in a direction close to the first mounting frame under the elastic force, and the measuring instrument measures the outer diameter of the workpiece;

[0013] A measuring tool, comprising a gauge head and a measuring rod capable of passing through the gauge head, wherein one end of the measuring rod is connected to the gauge head, and the other end of the measuring rod passes through a base and is provided with a third measuring head capable of contacting the second mounting frame.

[0014] Furthermore, in the above-mentioned inner and outer diameter comparison measuring instrument, the first mounting frame and the second mounting frame are arranged side by side in the base, a first slide groove is provided on the top of the base, and the first knob is embedded in the first slide groove.

[0015] Furthermore, in the above-mentioned inner and outer diameter comparison measuring instrument, the first mounting bracket is arranged in the base through an extension rod, and when the first knob controls the first mounting bracket to be in a loosened state, the first knob can drive the first mounting bracket to move in the length direction of the extension rod, and the bottoms of the first probe and the second probe are on the same plane.

[0016] Furthermore, in the above-mentioned inner and outer diameter comparison measuring instrument, the second mounting frame includes a vertical section arranged perpendicular to the first plane direction and a horizontal section parallel to the first plane direction, and the horizontal section is connected to the guide rail of the inner wall of the upper surface of the base through a slider, so that the second mounting frame can move along the length direction of the base, and the elastic member is installed at the bottom of the horizontal section.

[0017] Furthermore, in the above-mentioned inner and outer diameter comparison measuring instrument, the inner cavity of the first mounting frame is provided with a first mounting seat that moves up and down along its height direction, the bottom end of the first mounting seat is detachably connected to the first side head, and the first mounting frame is provided with an adjustment locking screw that can adjust the height of the first mounting seat.

[0018] Furthermore, in the above-mentioned inner and outer diameter comparison measuring instrument, the inner cavity of the vertical section of the second mounting frame is provided with a second mounting seat that moves up and down along its height direction, the bottom end of the second mounting seat is detachably connected to the second probe, and the second mounting frame is provided with an adjustment locking screw that can adjust the height of the second mounting seat.

[0019] Furthermore, in the above-mentioned inner and outer diameter comparison measuring instrument, the first probe and the second probe are both spherical probes, the first probe coincides with the central axis of the first mounting seat, and the second probe coincides with the central axis of the second mounting seat.

[0020] Furthermore, in the above-mentioned inner and outer diameter comparison measuring instrument, the angle between the first probe and the first mounting seat is 90°, the angle between the second probe and the second mounting seat is 90°, and the distance between the central axes of the first probe and the second probe is greater than the distance between the central axes of the first mounting seat and the second mounting seat.

[0021] Furthermore, in the above-mentioned inner and outer diameter comparison measuring instrument, the first probe and the second probe are both conical probes, the first probe coincides with the central axis of the first mounting seat, and the second probe coincides with the central axis of the second mounting seat.

[0022] Furthermore, in the above-mentioned inner and outer diameter comparison measuring instrument, the first probe and the second probe are both disc-shaped probes, the first probe coincides with the central axis of the first mounting seat, and the second probe coincides with the central axis of the second mounting seat.

[0023] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0024] 1. The inner and outer diameter comparison measuring instrument described in the utility model can replace different probes to measure different sizes, expand the application occasions, facilitate the measurement of a variety of different sizes, have high measurement accuracy, meet most measurement needs, flexibly set standard values, do not need specific standard ring gauges, greatly reduce production costs, quickly measure the actual working value, automatically lock the measurement state, and prevent operation errors; when the conventional measurement structure cannot meet the larger measurement range, a measurement structure with an extension rod can be selected to expand the measurement range of the measuring instrument;

[0025] 2. In the inner and outer diameter comparison measuring instrument described in the utility model, the elastic member is arranged at the bottom of the second mounting frame. When the elastic member is in a relaxed state, the second mounting frame moves in a direction away from the first mounting frame under the elastic force, and the measuring instrument measures the inner diameter size of the workpiece; when the elastic member is in a relaxed state, the second mounting frame moves in a direction close to the first mounting frame under the elastic force, and the measuring instrument measures the outer diameter size of the workpiece. The measuring principle of measuring the inner diameter or outer diameter of the workpiece is the same, and the difference lies in the different internal force measurement directions.

[0026] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the structure of the inner and outer diameter comparison measuring instrument in the embodiment of the utility model;

[0029] Figure 2 yes Figure 1 Schematic cross-sectional view of ;

[0030] Figure 3 It is a structural schematic diagram of an inner and outer diameter comparison measuring instrument in another embodiment of the utility model;

[0031] Figure 4 yes Figure 3 Schematic cross-sectional view of ;

[0032] Figure 5 and Figure 6 It is a schematic diagram of the first embodiment of the utility model;

[0033] Figure 7 and Figure 8 It is a schematic diagram of the second embodiment of the utility model;

[0034] Fig. 9 and Fig.10 It is a schematic diagram of the third embodiment of the present utility model;

[0035] Fig.11 and Fig.12 It is a schematic diagram of the fourth embodiment of the utility model;

[0036] Fig.13 and Fig.14 It is a schematic diagram of the installation of an elastic member for measuring the inner and outer diameters of a workpiece in an embodiment of the utility model.

[0037] The figure marks of the above drawings are: 1. base; 2. first mounting bracket; 3. second mounting bracket; 4. first measuring head; 5. second measuring head; 6. first knob; 7. second knob; 8. meter head; 9. measuring rod; 11. third measuring head; 12. first mounting seat; 13. second mounting seat; 14. guide rail; 15. slider; 16. first slide groove; 17. second slide groove; 18. extension rod; 19. elastic member. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0040] The utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0041] Reference Figures 1 to 14 This embodiment provides an inner and outer diameter comparison measuring instrument for measuring the inner diameter or outer diameter of a workpiece, comprising:

[0042] A base 1, wherein the base 1 has a hollow cavity, the plane where the bottom of the base 1 is located is a first plane, and a front side plate of the base 1 is provided with a second slide groove 17;

[0043] A first mounting frame 2 and a second mounting frame 3, the first mounting frame 2 and the second mounting frame 3 are arranged side by side in a direction perpendicular to the first plane, a first probe 4 capable of extending out of the first plane is provided at the bottom of the first mounting frame 2, and a second probe 5 capable of extending out of the bottom of the base 1 is provided at the bottom of the second mounting frame 3;

[0044] A first knob 6, which is disposed on the top of the first mounting frame 2. The first knob 6 can control the locking or releasing state of the first mounting frame 2. When the first knob 6 controls the first mounting frame 2 to be in the releasing state, the first knob 6 can drive the first probe 4 to move in a direction close to or away from the second probe 5;

[0045] A second knob 7, wherein the second knob 7 is embedded in the second slide groove 17, the second knob 7 is connected to the second mounting bracket 3 and the second knob 7 can drive the second probe 5 to move along the length direction of the base 1; the first knob 6 and the second knob 7 can adjust the measuring range of the measuring tool;

[0046] The elastic member 19 is arranged at the bottom of the second mounting frame 3, referring to Fig.13 When the elastic member 19 is in a relaxed state, the second mounting frame 3 moves to the left (i.e., moves away from the first mounting frame) under the elastic force, and the first probe 4 and the second probe 5 both contact the inner wall of the workpiece to be measured, and the measuring instrument measures the inner diameter of the workpiece; Fig.14 When the elastic member 19 is in a relaxed state, the second mounting frame 3 moves rightward under the elastic force (i.e. moves in the direction close to the first mounting frame), the first probe 4 and the second probe 5 are in contact with the outer wall of the workpiece to be measured, and the measuring instrument measures the outer diameter of the workpiece; the inner diameter or outer diameter of the workpiece is measured in the same principle, the difference is that the internal force measurement direction is different. In this embodiment, the elastic member 19 can be selected from springs or other elastic products.

[0047] The measuring tool comprises a gauge head 8 and a measuring rod 9 that can penetrate the gauge head 8, one end of the measuring rod 9 is connected to the gauge head 8, and the other end of the measuring rod 9 passes through the base 1 and is provided with a third measuring head 11 that can contact the second mounting frame 3. Specifically, in this embodiment, the measurement accuracy requirement is relatively high, and the measuring tool can be a micrometer.

[0048] Specifically, refer to Figure 1 and Figure 2 In this embodiment, the conventional measuring structure is: the first mounting frame 2 and the second mounting frame 3 are arranged side by side in the base 1, a first slide groove 16 is provided on the top of the base 1, and the first knob 6 is embedded in the first slide groove 16.

[0049] Specifically, refer to Figure 3 and Figure 4In another embodiment, the measurement range of the conventional measurement structure is limited. When a larger measurement range is required, the extended measurement structure is as follows: the first mounting frame 2 is arranged in the base 1 through the extension rod 18. When the first knob 6 controls the first mounting frame 2 to be in a loose state, the first knob 6 can drive the first mounting frame 2 to move in the length direction of the extension rod 18, and the bottoms of the first probe 4 and the second probe 5 are on the same plane. In this embodiment, the extension rod 18 can be a cylindrical structure, and the length of the extension rod 18 can be adjusted according to the actual measurement requirements. The extended measurement structure is a split structure. The first mounting frame 2 and the bottom measurement surface of the base 1 can be aligned with parallel pads to ensure that the two measurement surfaces are on the same plane, thereby ensuring the accuracy of the measurement.

[0050] Specifically, in this embodiment, the second mounting frame 3 includes a vertical section arranged perpendicular to the first plane direction and a horizontal section parallel to the first plane direction, and the horizontal section is connected to the guide rail 14 on the inner wall of the upper surface of the base 1 through a slider 15, so that the second mounting frame 3 can move along the length direction of the base 1, and the elastic member 19 is installed at the bottom of the horizontal section.

[0051] Specifically, in this embodiment, the inner cavity of the first mounting frame 2 is provided with a first mounting seat 12 that moves up and down along its height direction, the bottom end of the first mounting seat 12 is detachably connected to the first side head, and the first mounting frame 2 is provided with an adjustment locking screw (not shown in the figure) that can adjust the height of the first mounting seat 12, and the installation height position of the first probe 4 can be adjusted to adapt to different measurement depths.

[0052] Specifically, in the present embodiment, the inner cavity of the vertical section of the second mounting frame 3 is provided with a second mounting seat 13 which moves up and down along its height direction, the bottom end of the second mounting seat 13 is detachably connected to the second measuring head 5, and the second mounting frame 3 is provided with an adjusting locking screw (not shown in the figure) which can adjust the height of the second mounting seat 13, and the installation height position of the second measuring head 5 can be adjusted to adapt to different measuring depths.

[0053] With the above structure, the first probe 4 and the second probe 5 are both made of stainless steel, and the bottom of the base 1 is a smooth measuring surface. When in use, the smooth measuring surface contacts the workpiece to be measured, and the first probe 4 and the second probe 5 are both in contact with the inner wall or the outer wall of the workpiece to be measured. The meter is initialized first, and the comparison measurement method is adopted. According to the size range of the workpiece to be measured, the standard block is set, and the position of the first probe 4 and the second probe 5 is adjusted. The data measured by the meter head 8 is the deviation value relative to the standard block. Since the value of the standard block is known, the entire measured value is equal to the simple algebraic sum of the deviation value and the value of the standard block. In this way, it is only necessary to change the value of the standard block. The entire value of the workpiece can be measured conveniently after the calibration is set; the inner and outer diameter comparison measuring instrument of the utility model can replace different probes to measure different sizes, expand the application occasions, and conveniently measure a variety of different sizes. The measurement accuracy is high, which meets most measurement needs, and the standard value can be flexibly set without a specific standard ring gauge, which greatly reduces the production cost, and quickly measures the actual working value, automatically locks the measurement state, and prevents operation errors; when the conventional measurement structure cannot meet the larger measurement range, a measurement structure with an extension rod can be selected to expand the measurement range of the measuring instrument; in addition, the elastic member 19 is arranged at the bottom of the second mounting frame 3, referring to Fig.13 When the elastic member 19 is in a relaxed state, the second mounting frame 3 moves in a direction away from the first mounting frame due to the elastic force, and the first probe 4 and the second probe 5 are both in contact with the inner wall of the workpiece to be measured, and the measuring instrument measures the inner diameter of the workpiece; Fig.14 When the elastic member 19 is in a relaxed state, the second mounting frame 3 moves toward the first mounting frame under the elastic force, and the first probe 4 and the second probe 5 are in contact with the outer wall of the workpiece to be measured. The measuring instrument measures the outer diameter of the workpiece and the inner diameter or outer diameter of the workpiece. The measuring principle is the same, and the difference lies in the different internal force measurement directions.

[0054] The present invention is described in detail below through specific embodiments:

[0055] Embodiment 1

[0056] Specifically, refer to Figure 5 In this embodiment, the first probe 4 and the second probe 5 are both spherical probes. The first probe 4 coincides with the central axis of the first mounting seat 12 , and the second probe 5 coincides with the central axis of the second mounting seat 13 .

[0057] Specifically, refer to Figure 6When the required measuring range is increased, the extension rod is used to increase the measuring range, and the first mounting frame can be moved on the extension rod to adjust the measuring range; however, the measuring instrument with the extension rod structure is a split structure, and before measuring, parallel pads can be selected to calibrate the measuring surfaces of the first mounting frame and the base to ensure that the measuring surfaces of the first mounting frame and the base are in the same plane, thereby ensuring the accuracy of the measurement.

[0058] Embodiment 2

[0059] Specifically, refer to Figure 7 In this embodiment, the angle between the first probe 4 and the first mounting seat 12 is 90°, the angle between the second probe 5 and the second mounting seat 13 is 90°, and the distance between the central axis of the first probe 4 and the second probe 5 is greater than the distance between the central axis of the first mounting seat 12 and the second mounting seat 13. This set of probes can measure inner hole grooves.

[0060] Specifically, refer to Figure 8 When the required measuring range is increased, the extension rod is used to increase the measuring range, and the first mounting frame can be moved on the extension rod to adjust the measuring range; however, the measuring instrument with the extension rod structure is a split structure, and before measuring, parallel pads can be selected to calibrate the measuring surfaces of the first mounting frame and the base to ensure that the measuring surfaces of the first mounting frame and the base are in the same plane, thereby ensuring the accuracy of the measurement.

[0061] Embodiment 3

[0062] Specifically, refer to Fig. 9 In this embodiment, the first probe 4 and the second probe 5 are both conical probes. The first probe 4 coincides with the central axis of the first mounting seat 12, and the second probe 5 coincides with the central axis of the second mounting seat 13. A pair of conical probes can be used to measure the center distance of the holes of the workpiece.

[0063] Specifically, refer to Fig.10 When the required measuring range is increased, the extension rod is used to increase the measuring range, and the first mounting frame can be moved on the extension rod to adjust the measuring range; however, the measuring instrument with the extension rod structure is a split structure, and before measuring, parallel pads can be selected to calibrate the measuring surfaces of the first mounting frame and the base to ensure that the measuring surfaces of the first mounting frame and the base are in the same plane, thereby ensuring the accuracy of the measurement.

[0064] Embodiment 4

[0065] Specifically, refer to Fig.11In this embodiment, the first probe 4 and the second probe 5 are both disc-shaped probes. The first probe 4 coincides with the central axis of the first mounting seat 12, and the second probe 5 coincides with the central axis of the second mounting seat 13. A pair of disc-shaped probes can be used to measure the diameter of the groove in the hole.

[0066] Specifically, refer to Fig.12 When the required measuring range is increased, the extension rod is used to increase the measuring range, and the first mounting frame can be moved on the extension rod to adjust the measuring range; however, the measuring instrument with the extension rod structure is a split structure, and before measuring, parallel pads can be selected to calibrate the measuring surfaces of the first mounting frame and the base to ensure that the measuring surfaces of the first mounting frame and the base are in the same plane, thereby ensuring the accuracy of the measurement.

[0067] In the utility model, different probes or extension rods can be replaced to measure different sizes, thereby expanding the application occasions and facilitating the measurement of the sizes of various different workpieces. The measurement accuracy is high and meets most measurement requirements.

[0068] The utility model uses specific embodiments to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the utility model. At the same time, for ordinary technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. An inner and outer diameter comparison measuring instrument, It is characterized in that Used to measure the inner or outer diameter of workpieces, including: A base, the base having a hollow cavity, the plane where the bottom of the base is located is a first plane, and the front side plate of the base is provided with a second slide groove; A first mounting frame and a second mounting frame, wherein the first mounting frame and the second mounting frame are arranged side by side in a direction perpendicular to the first plane, a first probe capable of extending out of the first plane is provided at the bottom of the first mounting frame, and a second probe capable of extending out of the bottom of the base is provided at the bottom of the second mounting frame; A first knob, which is disposed on the top of the first mounting frame, and can control the locking or releasing state of the first mounting frame. When the first knob controls the first mounting frame to be in the releasing state, the first knob can drive the first probe to move in a direction close to or away from the second probe; A second knob, the second knob is embedded in the second slide groove, the second knob is connected to the second mounting bracket and the second knob can drive the second probe to move along the length direction of the base; an elastic member, wherein the elastic member is arranged at the bottom of the second mounting frame, and when the elastic member is in a relaxed state, the second mounting frame moves in a direction away from the first mounting frame under the elastic force, the first probe and the second probe both contact the inner wall of the workpiece to be measured, and the measuring instrument measures the inner diameter of the workpiece; when the elastic member is in a relaxed state, the second mounting frame moves in a direction close to the first mounting frame under the elastic force, the first probe and the second probe both contact the outer wall of the workpiece to be measured, and the measuring instrument measures the outer diameter of the workpiece; A measuring tool, comprising a gauge head and a measuring rod capable of passing through the gauge head, wherein one end of the measuring rod is connected to the gauge head, and the other end of the measuring rod passes through a base and is provided with a third measuring head capable of contacting the second mounting frame.

2. The inner and outer diameter comparison measuring instrument according to claim 1, It is characterized in that The first mounting frame and the second mounting frame are arranged side by side in the base, a first slide groove is arranged on the top of the base, and the first knob is embedded in the first slide groove.

3. The inner and outer diameter comparison measuring instrument according to claim 1, It is characterized in that The first mounting bracket is arranged in the base through an extension rod. When the first knob controls the first mounting bracket to be in a loose state, the first knob can drive the first mounting bracket to move in the length direction of the extension rod, and the bottoms of the first probe and the second probe are on the same plane.

4. The inner and outer diameter comparison measuring instrument according to claim 2 or 3, It is characterized in that The second mounting frame includes a vertical section arranged perpendicular to the first plane direction and a horizontal section parallel to the first plane direction. The horizontal section is connected to the guide rail of the inner wall of the upper surface of the base through a slider, so that the second mounting frame can move along the length direction of the base. The elastic member is installed at the bottom of the horizontal section.

5. The inner and outer diameter comparison measuring instrument according to claim 4, It is characterized in that The inner cavity of the first mounting frame is provided with a first mounting seat which moves up and down along its height direction, the bottom end of the first mounting seat is detachably connected to the first side head, and the first mounting frame is provided with an adjusting locking screw which can adjust the height of the first mounting seat.

6. The inner and outer diameter comparison measuring instrument according to claim 4, It is characterized in that The inner cavity of the vertical section of the second mounting frame is provided with a second mounting seat that moves up and down along its height direction. The bottom end of the second mounting seat is detachably connected to the second probe. The second mounting frame is provided with an adjustment locking screw that can adjust the height of the second mounting seat.

7. The inner and outer diameter comparison measuring instrument according to claim 6, It is characterized in that The first probe and the second probe are both spherical probes. The first probe coincides with the central axis of the first mounting seat, and the second probe coincides with the central axis of the second mounting seat.

8. The inner and outer diameter comparison measuring instrument according to claim 7, It is characterized in that The angle between the first probe and the first mounting seat is 90°, the angle between the second probe and the second mounting seat is 90°, and the distance between the central axes of the first probe and the second probe is greater than the distance between the central axes of the first mounting seat and the second mounting seat.

9. The inner and outer diameter comparison measuring instrument according to claim 6, It is characterized in that The first probe and the second probe are both conical probes. The first probe coincides with the central axis of the first mounting seat, and the second probe coincides with the central axis of the second mounting seat.

10. The inner and outer diameter comparison measuring instrument according to claim 6, It is characterized in that The first probe and the second probe are both disc-shaped probes. The first probe coincides with the central axis of the first mounting seat, and the second probe coincides with the central axis of the second mounting seat.

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