Auxiliary measuring tool for taper of conical hole and depth of blind hole

Abstract

The utility model provides an auxiliary measuring tool for the taper of a conical hole and the depth of a blind hole, and relates to the technical field of workpiece measurement. Comprising a hollow reference shell, a measuring rod arranged in the reference shell, a positioning sleeve used for positioning the measuring rod, a standard measuring head arranged at the top end of the measuring rod, a positioning block used for positioning the standard measuring head, a measuring cylinder used for measurement and a sealing cover arranged at one end of the reference shell. The measuring cylinder cover is arranged at one end of the measuring cylinder, the spring is arranged between the measuring cylinder cover and the sealing cover, the measuring rod, the positioning block and the standard measuring head move up and down together, and the measuring cylinder cover and the measuring cylinder move up and down together in the reference shell. The measuring tool is simple in structure, convenient to operate and easy to implement, the measuring tool can expand the original unique measuring instrument of a three-coordinate measuring machine to be used for measuring by using a common length measuring instrument, the original measuring time is shortened to 10-15 min from the original measuring time being greater than or equal to 30 min, and the measuring efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece measurement, in particular to an auxiliary measuring tool for the taper of a conical hole and the depth of a blind hole. Background Art

[0002] like Figure 5 As shown, the existing structure has a stepped hole, and the small hole of the stepped hole is a conical hole. The space of the large diameter reference surface of the conical hole is small, and the taper cannot be directly measured using an inclinometer. It is also difficult to measure it using a three-coordinate measuring machine. The effective depth of the step hole on the side cannot be measured using common measuring tools. When the number of this structural feature is greater than 10, the three-coordinate measuring machine is inefficient and time-consuming. Summary of the Invention

[0003] The purpose of this application is to provide an auxiliary measurement tool for the taper of a conical hole and the depth of a blind hole, so as to solve the technical problem of low efficiency of existing measurement tools.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: an auxiliary measuring tool for the taper of a conical hole and the depth of a blind hole, the measuring tool comprising: a hollow reference housing, a measuring rod arranged in the reference housing, a positioning sleeve for positioning the measuring rod, a standard probe arranged at the top of the measuring rod, a positioning block for positioning the standard probe, a measuring cylinder for measuring, a sealing cover arranged at one end of the reference housing, a measuring cylinder cover arranged at one end of the measuring cylinder, and a spring arranged between the measuring cylinder cover and the sealing cover, the measuring rod moves up and down together with the positioning block and the standard probe, and the measuring cylinder cover, the positioning sleeve and the measuring cylinder move up and down together in the reference housing.

[0005] The auxiliary measuring tool for the taper of a conical hole and the depth of a blind hole provided by the present utility model also has the following technical features: a housing step hole is provided at the center of the reference housing; one end of the reference housing is adapted to the measuring cylinder cover and is provided with a thread connected to the sealing cover; the other end of the reference housing is provided with a housing light hole adapted to the measuring cylinder.

[0006] The auxiliary measuring tool for the taper of conical holes and the depth of blind holes provided by the present invention also has the following technical features: one end of the measuring rod is provided with a measuring rod step that cooperates with the positioning block, one end of the measuring rod step is provided with a thread that cooperates with the standard probe, and the other end of the measuring rod step is provided with a boss.

[0007] The auxiliary measuring tool for the taper of a conical hole and the depth of a blind hole provided by the present invention also has the following technical features: the measuring rod passes through the center of the positioning sleeve; one end of the positioning sleeve is provided with a thread matching the measuring cylinder cover, and the other end is provided with a boss.

[0008] The auxiliary measuring tool for the taper of a conical hole and the depth of a blind hole provided by the utility model also has the following technical features: the standard measuring head is provided with a measuring head step, and the front end of the measuring head step is provided with a thread matching the measuring rod.

[0009] The auxiliary measuring tool for the taper of a conical hole and the depth of a blind hole provided by the present invention also has the following technical features: the positioning block is provided with a light hole adapted to the stepped shaft with a threaded end of the standard probe, and rectangular structures are provided on both sides to match the measuring cylinder; the positioning block is an axisymmetric structure.

[0010] The auxiliary measuring tool for the taper of a conical hole and the depth of a blind hole provided by the present utility model also has the following technical features: a through hole adapted to the standard probe is provided at the center of the measuring cylinder; a groove structure adapted to the rectangular structure of the positioning block is symmetrically provided on the side of the measuring cylinder; and a thread adapted to the measuring cylinder cover is provided at one end of the measuring cylinder with the groove structure.

[0011] The auxiliary measuring tool for the taper of a conical hole and the depth of a blind hole provided by the present utility model also has the following technical features: the measuring cylinder cover is provided with a stepped threaded hole, one end of the measuring cylinder cover is provided with a thread matching with the positioning sleeve, and the other end of the measuring cylinder cover is provided with a thread matching with the measuring cylinder.

[0012] The auxiliary measuring tool for the taper and blind hole depth of conical holes provided by the utility model also has the following technical features: a light hole for the positioning sleeve to pass through is provided in the center of the sealing cover, a thread matching the reference housing is provided on the outside of the sealing cover, and a keyway structure for installation is provided on the sealing cover.

[0013] Beneficial effects

[0014] The utility model provides an auxiliary measuring tool for the taper and blind hole depth of conical holes, which has a simple structure, is easy to operate and implement. The measuring tool can expand the original three-coordinate measuring machine's single measuring instrument to use ordinary length measuring instruments for measurement, and shortens the original measurement time of ≥30 minutes to 10-15 minutes, thereby improving measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 This is an exploded diagram of the structure of the measuring tool provided by the utility model;

[0017] Figure 2 A structural cross-sectional view of the measuring tool provided by the present utility model;

[0018] Figure 3 This is a working diagram of the measuring tool provided by the utility model when measuring the taper of a cylindrical hole;

[0019] Figure 4 This is a schematic diagram of the working state of the measuring tool provided by the present invention when measuring the depth dimension of a blind hole;

[0020] Figure 5 is the structural diagram of the structural component to be tested,

[0021] Among them, 1: measuring rod; 2: positioning sleeve; 3: sealing cover; 4: spring; 5: positioning block; 6: standard probe; 7: measuring tube cover; 8: measuring tube; 9: reference housing. DETAILED DESCRIPTION

[0022] The present application is further described in detail below with reference to the accompanying drawings and examples. However, it should be noted that these embodiments are not limitations of the present application, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in this field based on these embodiments are within the scope of protection of the present application.

[0023] In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the creation of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the creation of the present application.

[0024] Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. In the description of the inventions of this application, unless otherwise specified, "plurality" means two or more.

[0025] The terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of these terms in the context of this application based on specific circumstances.

[0026] like Figure 1-4 As shown, an embodiment of the present application provides an auxiliary measurement tool for the taper and blind hole depth of a conical hole. The measurement tool includes: a hollow reference housing 9, a measuring rod 1 disposed within the reference housing, a positioning sleeve 2 for positioning the measuring rod 1, a standard probe 6 disposed at the top of the measuring rod, a positioning block 5 for positioning the standard probe, a measuring cylinder 8 for measurement, a sealing cover 3 disposed at one end of the reference housing, a measuring cylinder cover 7 disposed at one end of the measuring cylinder, and a spring 4 disposed between the measuring cylinder cover and the sealing cover. The measuring rod 1 moves up and down together with the positioning block 5 and the standard probe 6. The measuring cylinder cover 7, the positioning sleeve 2, and the measuring cylinder 8 move up and down together within the reference housing 9. The inner diameter of spring 4 is adapted to that of the positioning sleeve 2, and spring 4 is a compression spring. In its natural state, spring 4 positions the measuring cylinder 8 outside the reference housing 9.

[0027] In some embodiments, a shell step hole is provided in the center of the reference shell 9, one end of the reference shell 9 is adapted to the measuring cylinder cover 7 and is provided with a thread connected to the sealing cover 3, and the other end of the reference shell 9 is provided with a shell light hole adapted to the measuring cylinder 8.

[0028] In some embodiments, one end of the measuring rod 1 is provided with a measuring rod step that cooperates with the positioning block 5, one end of the measuring rod step is provided with a thread that cooperates with the standard probe 6, and the other end of the measuring rod step is provided with a boss.

[0029] In some embodiments, the measuring rod 1 passes through the center of the positioning sleeve 2. One end of the positioning sleeve 2 is provided with a thread that mates with the measuring tube cover 7, and the other end is provided with a boss. The threaded positioning sleeve 2, which mates with the measuring tube cover 7, defines the upper limit of movement of the measuring rod 1, the positioning block 5, and the standard probe 6.

[0030] In some embodiments, the standard probe 6 is provided with a measuring head step, and a front end of the measuring head step is provided with a thread that matches the measuring rod 1 .

[0031] In some embodiments, the positioning block 5 is provided with a light hole adapted to the threaded end stepped shaft of the standard probe 6, and rectangular structures are provided on both sides to match the measuring cylinder 8. The positioning block 5 is an axisymmetric structure.

[0032] In some embodiments, a through hole is provided in the center of the measuring cylinder 8 to match the standard measuring head 6, a groove structure is symmetrically provided on the side of the measuring cylinder 8 to match the rectangular structure of the positioning block 5, and a thread is provided at the end of the measuring cylinder 8 with the groove structure to match the measuring cylinder cover 7.

[0033] In some embodiments, the measuring cylinder cover 7 is provided with a stepped threaded hole, one end of the measuring cylinder cover 7 is provided with a thread that matches the positioning sleeve 2, and the other end of the measuring cylinder cover 7 is provided with a thread that matches the measuring cylinder 8.

[0034] In some embodiments, the sealing cover 3 is provided with a light hole in the center for the positioning sleeve 2 to pass through, the sealing cover 3 is provided with a thread on the outside that matches the reference housing 9, and the sealing cover 3 is provided with a keyway structure for installation.

[0035] In some embodiments, the measuring rod 1 is made of GCr15, heat-treated to a hardness of HRC 58-65, and has a surface roughness of Ra 1.6 μm. It features a boss on its upper end and a step at its lower end, with threads at the end of the step. The positioning sleeve 2 is made of GCr15, heat-treated to a hardness of HRC 53-60, and has a surface roughness of Ra 1.6 μm. It has a boss on its upper end and a central through-hole with a diameter of Φd, through which the measuring rod 1 passes to connect to the standard probe. The sealing cover 3 is made of GCr15, heat-treated to a hardness of HRC 53-60, and has a shaft-shaped structure with an M10 threaded cylindrical surface. It has a keyway on its upper end to facilitate mounting on the reference housing 9 and a central through-hole for the positioning sleeve 2 to pass through and connect to the measuring tube cover 7. Spring 4 is made of 55CrSiA, heat-treated to HRC 58-65, with a surface roughness of Ra 0.8μm. Its outer diameter, Dw, is ≤9 mm, its inner diameter, Dn, is ≥3.8 mm, and its cross-sectional diameter, d, is ≤0.8 mm. It is a standard pressure spring. The measuring tube cover 7 is made of GCr15, heat-treated to HRC 53-60, and has a cylindrical shape with an internally stepped threaded hole in the center. The small threaded end connects to the positioning sleeve, while the large threaded end is threaded into the measuring tube 8. The positioning block 5 is made of GCr15, heat-treated to HRC 53-60, and has a cylindrical shape with a symmetrical rectangular structure on the cylindrical surface, which mates with the keyway on the measuring tube. The inner diameter of the hole matches the step on the standard measuring probe. The standard measuring probe 6 is made of GCr15, heat-treated to HRC 53-60, and has a cylindrical shape with a diameter, d, and a stepped end. Its surface roughness is Ra 0.8μm, and the center of the stepped end surface has an internal thread. The measuring tube is made of GCr15, heat-treated to a hardness of HRC 53-60, and has a surface roughness of Ra 0.8μm. It is cylindrical with a diameter D, a central through-hole, and a symmetrical keyway on the cylindrical surface. The keyway's starting point has an internal thread. The reference housing 9 is made of GCr15, heat-treated to a hardness of HRC 58-65, and has a surface roughness of Ra 1.6μm. It is cylindrical with a central stepped hole. The large hole has an internal thread that mates with the external thread of the sealing cover, and the small hole has a clearance to match the outer diameter of the measuring tube.

[0036] The assembly process of the measurement work provided by any of the above embodiments is as follows:

[0037] The measuring rod 1 is sequentially passed through the center hole of the positioning sleeve 2, the center hole of the sealing cover 3, the center of the spring 4, the center hole of the measuring tube cover 7, and the center hole of the positioning block 5, and connected to the threaded connection with the standard measuring head 6. The rectangular structure of the positioning block 5 is placed in the keyway that matches the side wall of the measuring tube 8, and the end face of the positioning block 5's center hole is placed on the step that matches the standard measuring head 6. The measuring tube cover 7 and the measuring tube 8 are connected by threads to ensure that the positioning block 5 can move up and down along the groove within the measuring tube 8. The sealing cover 3 and the reference housing 9 are also connected by threads to ensure that the spring 4 has resistance to the measuring tube cover 7, thereby achieving the purpose of determining the position of the measuring tube 8. The positioning sleeve 2 and the measuring tube cover 7 are connected by matching threads to limit the free movement of the positioning sleeve 2. The vertical position of the positioning sleeve 2 is determined by adjusting the threaded connection.

[0038] The working process of the measurement tool provided in any of the above embodiments is as follows:

[0039] First, calibrate the assembled measuring auxiliary tool. Place the end face of the measuring cylinder 8 on the measuring platform and press the measuring rod 1 so that the measuring cylinder 8 and the standard probe 6 contact the measuring platform at the same time. Then, rotate the positioning sleeve 2 so that it contacts the positioning block 5. Use a common length gauge to measure the distance L1 between the positioning sleeve 2 and the end face of the measuring rod 1 to complete the calibration. Place the end face of the reference housing 9 on the large diameter surface of the tapered hole and press the measuring rod 1 so that the end face of the standard probe 6 contacts the interface of the tapered hole. Use a common length gauge to measure the distance L2 between the positioning sleeve 2 and the end face of the measuring rod 1. Finally, calculate the taper C of the tapered hole of the measured object, which is equal to the quotient of the difference between the diameter of the measuring cylinder and the diameter of the standard probe and the difference between the two measured values, that is:

[0040]

[0041] To measure the blind hole depth, calibrate the assembled measuring tool as described above. Place the measuring tube 8 on the end face of the blind hole. Press the measuring rod 1 until the end face of the standard probe 6 contacts the bottom surface of the blind hole. Use a common length gauge to measure the distance L2 between the positioning sleeve 2 and the end face of the measuring rod 1. Finally, calculate the blind hole depth L, which is equal to the difference between the two measurements: L = L1 - L2.

[0042] The working principle of the measurement tool provided in any of the above embodiments is as follows:

[0043] Use standard probe 6 to determine the diameter of one cone perpendicular to the conic line, and use measuring cylinder 8 to determine the diameter of the other cone perpendicular to the conic line. Utilizing the height difference between the end faces of positioning sleeve 2 and measuring rod 1 during calibration, and the height difference between measuring cylinder 8 and standard probe 6 on the measured cone, the axial distance between the two sections of the measured cone hole is determined.

[0044] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above description is merely a preferred embodiment of the present application. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A tool for measuring the taper of a conical hole and the depth of a blind hole, characterized in that: The measuring tool comprises: a hollow reference housing, a measuring rod disposed in the reference housing, a positioning sleeve for positioning the measuring rod, a standard probe disposed at the top of the measuring rod, a positioning block for positioning the standard probe, a measuring cylinder for measuring, a sealing cover disposed at one end of the reference housing, a measuring cylinder cover disposed at one end of the measuring cylinder, and a spring disposed between the measuring cylinder cover and the sealing cover. The measuring rod moves up and down together with the positioning block and the standard probe. The measuring cylinder cover, the positioning sleeve and the measuring cylinder move up and down together in the reference housing.

2. The auxiliary measuring tool for tapered hole taper and blind hole depth according to claim 1, characterized in that: A housing step hole is provided at the center of the reference housing. One end of the reference housing is adapted to the measuring cylinder cover and is provided with a thread connected to the sealing cover. The other end of the reference housing is provided with a housing light hole adapted to the measuring cylinder.

3. The auxiliary measuring tool for tapered hole taper and blind hole depth according to claim 1, characterized in that: One end of the measuring rod is provided with a measuring rod step that matches the positioning block, one end of the measuring rod step is provided with a thread that matches the standard probe, and the other end of the measuring rod step is provided with a boss.

4. The auxiliary measuring tool for tapered hole taper and blind hole depth according to claim 1, characterized in that: The measuring rod passes through the center of the positioning sleeve. One end of the positioning sleeve is provided with a thread that matches the measuring cylinder cover, and the other end is provided with a boss.

5. The auxiliary measuring tool for tapered hole taper and blind hole depth according to claim 1, characterized in that: The standard measuring head is provided with a measuring head step, and a thread matching the measuring rod is provided at the front end of the measuring head step.

6. The auxiliary measuring tool for tapered hole taper and blind hole depth according to claim 1, characterized in that: The positioning block is provided with a light hole adapted to the threaded end stepped shaft of the standard probe, and rectangular structures matched with the measuring cylinder are provided on both sides. The positioning block is an axisymmetric structure.

7. The auxiliary measuring tool for tapered hole taper and blind hole depth according to claim 1, characterized in that: The center of the measuring cylinder is provided with a through hole adapted to the standard measuring head, the side of the measuring cylinder is symmetrically provided with a groove structure adapted to the rectangular structure of the positioning block, and the end of the measuring cylinder with the groove structure is provided with a thread adapted to the measuring cylinder cover.

8. The auxiliary measuring tool for tapered hole taper and blind hole depth according to claim 1, characterized in that: The measuring cylinder cover is provided with a stepped threaded hole, one end of the measuring cylinder cover is provided with a thread matching with the positioning sleeve, and the other end of the measuring cylinder cover is provided with a thread matching with the measuring cylinder.

9. The auxiliary measuring tool for tapered hole taper and blind hole depth according to claim 1, characterized in that: The center of the sealing cover is provided with a light hole for the positioning sleeve to pass through, the outer side of the sealing cover is provided with a thread that matches the reference housing, and the sealing cover is provided with a keyway structure for installation.

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