Device for measuring diameter of inner hole of part
By designing an internal hole measurement device including platforms, column -shaped cushions, cylindrical sales, and adjustment parts, the problem of high cost and low efficiency of the existing inner hole measurement equipment is solved, and the internal hole diameter measurement of economically high efficiency is achieved. High accuracy and wide application.
Patent Information
- Application Number
- CN202421174590.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The existing inner hole measurement equipment has high procurement costs and low measurement efficiency, and requires regular re-inspections, resulting in troublesome use.
Design a measurement device that includes platforms, column -shaped cushions, first circular pillar sales, second cylindrical sales, and adjustable regulatory parts. Diameter measurement inner hole diameter.
The internal hole diameter measurement of economically efficient internal holes is achieved, the cost of equipment is reduced, and the measurement difference is reduced. The measurement accuracy can reach ± 0.003mm, which is suitable for most occasions.
Smart Images
Figure CN222418880U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical measurement, in particular to a device for measuring the diameter of an inner hole of a part. Background Art
[0002] In mechanical processing or mechanical assembly, it is common to measure the inner diameter of parts. However, the existing inner hole measurement often uses special measuring tools. For example, the current domestic conventional detection of the inner diameter of the hole uses special measuring tools such as inner diameter micrometers or inner diameter micrometers, which have high procurement costs and require regular re-inspections to ensure the reliability of its measurement accuracy; or it is measured on a three-coordinate machine. Generally, the entire three-coordinate machine is large and occupies a large space. Therefore, the procurement cost of existing instruments and equipment for accurately measuring inner holes is relatively high, the measurement efficiency is relatively low, and regular re-inspections are required, which is relatively troublesome.
[0003] Therefore, those skilled in the art are committed to developing a cost-effective and simple device for measuring the inner hole diameter of a part. Utility Model Content
[0004] In view of the above-mentioned defects in the prior art, the utility model discloses a device for measuring the diameter of the inner hole of a part, and the technical problem to be solved is to provide a simple device for measuring the diameter of the inner hole of a part in an economical and efficient manner.
[0005] To achieve the above-mentioned purpose, the utility model provides a device for measuring the diameter of the inner hole of a part, comprising a platform, on which a cylindrical pad is movably arranged, the outer diameter d of the cylindrical pad is smaller than the inner diameter D of the inner hole of the part to be measured, and the height E of the cylindrical pad is smaller than the height H of the inner hole of the part to be measured. During measurement, the cylindrical pad is placed in the inner hole of the part to be measured to raise the cylindrical pin and the locking device. A first cylindrical pin and a second cylindrical pin are movably arranged on the cylindrical pad to abut against the inner hole of the part to be measured, and the first cylindrical pin and the second cylindrical pin are tangent to the inner hole of the part during measurement, and an adjustable length adjusting member is arranged between the first cylindrical pin and the second cylindrical pin, and the two ends of the adjusting member are used to abut against the first cylindrical pin and the second cylindrical pin respectively after adjustment.
[0006] The specific measuring steps of the device for measuring the inner hole diameter of a part are as follows:
[0007] 1) When measuring the inner hole of a part, place the workpiece to be measured on the platform, place the cylindrical pad at the bottom of the inner hole of the workpiece to be measured, place the first cylindrical pin and the second cylindrical pin on the upper surface of the cylindrical pad, and place the first cylindrical pin and the second cylindrical pin in the inner hole of the workpiece to be measured;
[0008] 2) The outer arc surfaces of the first cylindrical pin and the second cylindrical pin are respectively tangent to the inner arc surface of the test piece;
[0009] 3) Changing the length of the adjusting member so that both ends of the adjusting member are respectively in contact with the circumferential surfaces of the first cylindrical pin and the second cylindrical pin, and the length of the adjusting member is maximized;
[0010] 4) Use an outside micrometer to measure the diameter A of the first cylindrical pin, the diameter B of the second cylindrical pin and the length C of the locking piece. Add the three dimensions together to get the inner diameter D of the inner hole of the piece to be tested.
[0011] Preferably, the relationship among the length C of the adjusting member, the diameter A of the first cylindrical pin, the diameter B of the second cylindrical pin and the inner diameter D of the inner hole of the test piece is: D=A+B+C.
[0012] Preferably, the adjusting member includes a tightening sleeve, a screw is connected to the tightening sleeve thread, one end of the screw extends out of the tightening sleeve, and the length of the entire adjusting member can be adjusted by rotating the screw so that the two ends of the adjusting member respectively fit and abut against the circumferential surfaces of the first cylindrical pin and the second cylindrical pin.
[0013] Preferably, the end of the screw rod extending out of the adapter sleeve is provided with an inner hexagonal hole, and the screw rod can be rotated by fixing the adapter sleeve and inserting an outer hexagonal rod into the inner hexagonal hole.
[0014] Preferably, a clamping flat square portion is provided on the outer side of the adapter sleeve, and a wrench can be used to clamp the clamping flat square portion outside the adapter sleeve to fix the adapter sleeve, and then the screw rod can be rotated, which is more labor-saving.
[0015] Preferably, the clamping flat square portion is a square groove along the axial direction, and the clamp of the wrench can be clamped in the square groove to avoid sliding.
[0016] Preferably, a radial threaded through hole is provided on the side wall of the adapter sleeve, a set screw is fitted in the threaded through hole, and the end of the set screw can abut against the screw rod. The set screw is used to fix the screw rod, and after adjusting the measuring length, the set screw is locked to fix it.
[0017] Preferably, the height E of the cylindrical pad, the height F of the first cylindrical pin and the second cylindrical pin, and the height H of the inner hole of the test piece are in the following relationship: H<E+F.
[0018] The beneficial effects of the utility model are:
[0019] Through the structural design of the device for measuring the inner hole diameter of the part, the utility model proposes a measurement structure and method with simple structure and good economy. Compared with the existing special measuring tools and three-coordinate measuring instrument detection equipment, it does not require regular re-inspection, greatly reducing the equipment cost, and the detection is convenient and fast, more economical and efficient. The measurement difference can be controlled within ±0.003mm, which can fully meet the measurement accuracy for most occasions. At the same time, the device for measuring the inner hole diameter of the part of the utility model does not require a special inner diameter measuring instrument, and can conveniently and flexibly detect the inner hole size of the part. In the absence of a special high-precision inner hole measuring tool, it is still a good device for measuring the inner hole size. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model;
[0021] Figure 2 It is a cross-sectional schematic diagram of a specific implementation mode of the utility model;
[0022] Figure 3 It is a dimensional structure diagram of a cross-sectional schematic diagram of a specific embodiment of the utility model;
[0023] Figure 4 It is a schematic diagram of the internal and overall structure of the adjusting member of the utility model.
[0024] In the above drawings: 1, platform; 2, cylindrical pad; 3, test piece; 41, first cylindrical pin; 42, second cylindrical pin; 5, adjusting piece; 51, fixing sleeve; 511, clamping flat square portion; 52, screw; 521, hexagon socket hole; 53, fixing screw. DETAILED DESCRIPTION
[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific manner, and therefore cannot be understood as a limitation on the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0026] like Figures 1 to 3As shown, the utility model provides a device for measuring the diameter of the inner hole of a part, including a platform 1, on which a cylindrical pad 2 is movably arranged, the outer diameter d of the cylindrical pad 2 is smaller than the inner diameter D of the inner hole of the workpiece 3 to be measured, and the height E of the cylindrical pad 2 is smaller than the height H of the inner hole of the workpiece 3 to be measured. During measurement, the cylindrical pad 2 is placed in the inner hole of the workpiece 3 to be measured, so as to raise the cylindrical pin and the locking device. A first cylindrical pin 41 and a second cylindrical pin 42 are movably arranged on the cylindrical pad 2 to abut against the inner hole of the workpiece 3 to be measured, and the first cylindrical pin 41 and the second cylindrical pin 42 are tangent to and fit with the inner hole of the part during measurement, and an adjustable length adjusting member 5 is arranged between the first cylindrical pin 41 and the second cylindrical pin 42, and the two ends of the adjusting member 5 are used to abut against the first cylindrical pin 41 and the second cylindrical pin 42 respectively after adjustment.
[0027] The specific measuring steps of the device for measuring the inner hole diameter of a part are as follows:
[0028] 1) When measuring the inner hole of a part, the workpiece 3 to be tested is placed on the platform 1, and the cylindrical pad 2 is placed at the bottom of the inner hole of the workpiece 3 to be tested, so that the first cylindrical pin 41 and the second cylindrical pin 42 are both placed on the upper surface of the cylindrical pad 2, and the first cylindrical pin 41 and the second cylindrical pin 42 are both located in the inner hole of the workpiece 3 to be tested;
[0029] 2) The outer arc surfaces of the first cylindrical pin 41 and the second cylindrical pin 42 are respectively tangent to and fit with the inner arc surface of the test piece 3;
[0030] 3) Changing the length of the adjusting member 5 so that both ends of the adjusting member 5 are respectively in contact with the circumferential surfaces of the first cylindrical pin 41 and the second cylindrical pin 42, and the length of the adjusting member 5 is maximized;
[0031] 4) Use an outside micrometer to measure the diameter A of the first cylindrical pin 41, the diameter B of the second cylindrical pin 42 and the length C of the locking member. The three dimensions are added together to obtain the inner diameter D of the inner hole of the test piece 3.
[0032] like Figure 3 As shown, the relationship between the length C of the adjusting member 5, the diameter A of the first cylindrical pin 41, the diameter B of the second cylindrical pin 42 and the inner diameter D of the inner hole of the test piece 3 is: D = A + B + C. The relationship between the height E of the cylindrical pad 2, the height F of the first cylindrical pin 41 and the second cylindrical pin 42 and the height H of the inner hole of the test piece 3 is: H < E + F.
[0033] In the above embodiments, through the structural design of the device for measuring the inner hole diameter of the part, the utility model proposes a measurement structure and method with simple structure and good economy. Compared with the existing special measuring tools and three-coordinate measuring instrument detection equipment, it does not require regular re-inspection, greatly reducing the equipment cost, and the detection is convenient and fast, more economical and efficient. The measurement difference can be controlled within ±0.003mm, which can fully meet the measurement accuracy for most occasions. At the same time, the device for measuring the inner hole diameter of the part of the utility model does not require a special inner diameter measuring instrument, and can conveniently and flexibly detect the inner hole size of the part. In the absence of a special high-precision inner hole measuring tool, it is still a good device for measuring the inner hole size.
[0034] like Figure 4 As shown, the adjusting member 5 includes a tightening sleeve 51, and a screw rod 52 is connected to the screw thread of the tightening sleeve 51. One end of the screw rod 52 extends out of the tightening sleeve 51. The length of the entire adjusting member 5 can be adjusted by rotating the screw rod 52, so that the two ends of the adjusting member 5 are respectively fitted and abutted against the circumferential surfaces of the first cylindrical pin 41 and the second cylindrical pin 42. Specifically. The end of the screw rod 52 extending out of the tightening sleeve 51 is provided with an inner hexagonal hole 521. The tightening sleeve 51 can be fixed, and an outer hexagonal rod is placed in the inner hexagonal hole 521 to rotate the screw rod 52. In order to facilitate the adjustment of the length, a clamping flat square portion 511 is provided on the outer side of the tightening sleeve 51. The clamping flat square portion 511 outside the tightening sleeve 51 can be clamped with a wrench to fix the tightening sleeve 51, and then the screw rod 52 is rotated, which is more labor-saving. The clamping flat square portion 511 is a square groove along the axial direction, and the clamp of the wrench can be stuck in the square groove to avoid sliding. The side wall of the adapter sleeve 51 is provided with a radial threaded through hole, in which a set screw 53 is fitted, and the end of the set screw 53 can abut against the screw rod 52. The set screw 53 is used to fix the screw rod 52. After adjusting the measuring length, the set screw 53 is locked to fix it.
[0035] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.
Claims
1. A device for measuring the inner hole diameter of a part, characterized in that: The invention comprises a platform (1), on which a cylindrical pad (2) is arranged, wherein an outer diameter d of the cylindrical pad (2) is smaller than an inner diameter D of an inner hole of a test piece (3), and a height E of the cylindrical pad (2) is smaller than a height H of the inner hole of the test piece (3); a first cylindrical pin (41) and a second cylindrical pin (42) are movably arranged on the cylindrical pad (2) and are abutted against the inner hole of the test piece (3); an adjusting member (5) with adjustable length is arranged between the first cylindrical pin (41) and the second cylindrical pin (42), and two ends of the adjusting member (5) are respectively abutted against the first cylindrical pin (41) and the second cylindrical pin (42).
2. The device for measuring the inner hole diameter of a part according to claim 1, characterized in that: The adjusting member (5) comprises a tightening sleeve (51), a screw rod (52) is threadedly connected to the tightening sleeve (51), and one end of the screw rod (52) extends out of the tightening sleeve (51).
3. The device for measuring the inner hole diameter of a part according to claim 2, characterized in that: The end of the screw rod (52) extending out of the adapter sleeve (51) is provided with a hexagonal hole (521).
4. The device for measuring the inner hole diameter of a part according to claim 3, characterized in that: The outer side of the adapter sleeve (51) is provided with a clamping flat square portion (511).
5. The device for measuring the inner hole diameter of a part according to claim 4, characterized in that: The clamping flat square portion (511) is a square groove along the axial direction.
6. The device for measuring the inner hole diameter of a part according to claim 2, characterized in that: A radial threaded through hole is provided on the side wall of the adapter sleeve (51), a set screw (53) is fitted in the threaded through hole, and the end of the set screw (53) can abut against the screw rod (52).
7. The device for measuring the inner hole diameter of a part according to claim 1, characterized in that: The relationship between the height E of the columnar pad (2), the height F of the first cylindrical pin (41) and the second cylindrical pin (42), and the inner hole height H of the test piece (3) is: H<E+F.
8. The device for measuring the inner hole diameter of a part according to claim 1, characterized in that: The relationship between the length C of the adjusting member (5), the diameter A of the first cylindrical pin (41), the diameter B of the second cylindrical pin (42) and the inner diameter D of the inner hole of the test piece (3) is: D=A+B+C.