Rapid and stable measuring device for large outside micrometer

Abstract

The invention discloses a rapid and stable measuring device for a large outside micrometer. The rapid and stable measuring device comprises a supporting seat and four supporting rods which are arranged around the center of the supporting seat at equal intervals. The supporting seat is detachably mounted at one end of a micrometer frame of the large outside micrometer; the supporting rod is arranged on the supporting seat, the head of the supporting rod faces the other end of the ruler frame, and the head of the supporting rod is configured to be capable of extending or retracting relative to one end of the ruler frame. The problems that a measuring rod is insufficient in rigidity and prone to deformation due to the fact that an existing large external diameter micrometer is large in measuring span, the centering precision is low, operation is inconvenient, alignment is not easy, and the surface of a workpiece is scratched in the measuring process are solved, measuring errors are reduced, the deformation resistance of the measuring rod is improved, the centering precision and operation convenience of measurement are improved, and the working efficiency is improved. And the measurement precision and stability of the large outside micrometer in a large-size workpiece measurement scene are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of precision measuring instrument technology, and in particular to a rapid and stable measuring device for large outside micrometers. Background Technology

[0002] With the development of the machinery industry, precision machine tools have been widely used, and the application range of large lathes is becoming increasingly wider. Workpieces with diameters exceeding 500mm are also becoming more common. Micrometers, as precision measuring tools, are widely used in machining and other fields due to their high precision. However, large outside micrometers (typically referring to measuring ranges of 500mm and above) have a large measuring span, insufficient rigidity of the measuring rod, and are difficult to position correctly during measurement, leading to larger measurement errors and operational inconvenience.

[0003] like Figure 1 , 2 The workpiece shown has a diameter of 550mm and a tolerance of 0.03mm. Using calipers on the processing site cannot guarantee the product's accuracy. Using a traditional outside micrometer results in large measurement errors due to its own weight and length, especially when measuring aluminum parts, which can easily scratch the product.

[0004] Therefore, those skilled in the art are dedicated to developing a fast and stable measuring device for large outside micrometers, which facilitates the alignment of large outside micrometers without scratching the workpiece. Summary of the Invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that large outside micrometers are not easy to slide or are difficult to align, the measuring rod is not rigid enough, and the measurement error is too large.

[0006] To achieve the above objectives, the present invention provides a rapid and stable measuring device for large outside micrometers, comprising: Support base, which is detachably mounted on one end of the frame of the large outside micrometer; and Four support rods are equidistantly arranged around the center of the support base. Each support rod has a spherical head, which faces the other end of the ruler frame. The head of the support rod is configured to extend or retract relative to one end of the ruler frame.

[0007] Furthermore, the support base includes a fixing part and a support base body. The fixing part is detachably installed on one end of the ruler frame. The support rod is disposed on the support base body. The support base body allows the measuring rod disposed on one end of the ruler frame to pass through.

[0008] Furthermore, the fixing part has an inner surface that mates with the outer surface of one end of the ruler frame, and a fixing threaded hole is provided on the side of the fixing part. A fixing screw is provided on the fixing threaded hole, and the fixing screw is configured to be screwed into the fixing threaded hole and abut against the outer surface of one end of the ruler frame.

[0009] Furthermore, a through hole is provided at the center of the support body, which allows the measuring rod located at one end of the ruler to pass through.

[0010] Furthermore, the support body has four slots around its center, and each support rod is disposed in a corresponding slot. The slot has an opening facing the other end of the ruler and a mounting hole at the bottom of the slot. The tail of the support rod has a threaded hole, and an adjusting screw is disposed on the mounting hole. The adjusting screw is configured to pass through the mounting hole and screw into the threaded hole to connect with the support rod. A spring is connected between the bottom of the slot and the tail of the support rod.

[0011] Furthermore, during the measurement process, the head of the support rod first contacts the workpiece to be measured, serving to provide auxiliary support and prevent scratches on the workpiece.

[0012] Furthermore, when the head of the support rod extends relative to one end of the ruler, the extension length of the support rod exceeds that of the measuring rod.

[0013] Furthermore, when the head of the support rod is not subjected to external force, the spring is at its natural length, and the initial extension length of the support rod exceeds that of the measuring rod.

[0014] Furthermore, the adjusting screw is also configured to adjust the initial extension length of the four support rods to be consistent by adjusting the depth of screwing into the connecting threaded hole.

[0015] Furthermore, when the head of the support rod contacts the workpiece to be measured, the tail of the support rod compresses the spring, causing the support rod to retract inward along the slot, and each support rod is configured to retract individually by a different distance.

[0016] The beneficial effects of this invention are as follows: This invention effectively solves the problems of insufficient rigidity and easy deformation of the measuring rod in existing large outside micrometers due to the large measurement span, as well as low centering accuracy, inconvenient operation, difficulty in alignment, and scratching of the workpiece surface during the measurement process. It reduces measurement errors, improves the deformation resistance of the measuring rod, improves the measurement centering accuracy and operation convenience, and effectively improves the measurement accuracy and stability of large outside micrometers in the measurement of large-size workpieces.

[0017] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0018] Figure 1 This is the front view of the workpiece to be measured; Figure 2 yes Figure 1 A cross-sectional view along the AA direction; Figure 3 This is a structural diagram of a traditional large-diameter outside micrometer; Figure 4 This is a schematic diagram of a large outside micrometer equipped with a rapid and stable measuring device according to a preferred embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a fast and stable measuring device according to a preferred embodiment of the present invention; Figure 6 This is an exploded view of a fast and stable measuring device according to a preferred embodiment of the present invention; Figure 7 This is a schematic diagram of the support base according to a preferred embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of a spring according to a preferred embodiment of the present invention; Figure 9 This is a schematic diagram of the support rod according to a preferred embodiment of the present invention; Figure 10 This is a schematic diagram of the use of a large outside micrometer equipped with a fast and stable measuring device according to a preferred embodiment of the present invention.

[0019] Among them, 10-large outside micrometer, 11-meter frame, 12-measuring rod, 13-measuring screw, 14-fixed sleeve, 15-movable graduated cylinder, 20-fast and stable measuring device, 21-support base, 22-spring, 23-support rod, 24-fixing screw, 25-fixing part, 26-support base body, 27-slot, 28-adjusting screw, 29-through hole. Detailed Implementation

[0020] The preferred embodiments of the present invention are described below with reference to the accompanying drawings to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0021] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0022] like Figure 3 As shown, a traditional large outside micrometer 10 includes a frame 11, a measuring rod 12, a measuring screw 13, a fixed sleeve 14, and a movable graduated cylinder 15. The measuring rod 12 is fixedly mounted on one end of the frame 11, and the other end of the frame 11 has a measuring component mounting hole. The fixed sleeve 14 is mounted on the measuring component mounting hole, and the measuring screw 13 passes through the measuring component mounting hole, the fixed sleeve 14, and is coaxially threaded to the movable graduated cylinder 15. The measuring rod 12 and the measuring screw 13 are arranged opposite each other and have flat measuring surfaces. The workpiece to be measured is placed between the measuring rod 12 and the measuring screw 13.

[0023] The fixed sleeve 14 has a horizontal line, and the movable graduated cylinder 15 has equidistant graduations on its outer circumference. The graduations on the movable graduated cylinder 15 are horizontal lines that divide the circumference into, for example, 50 equal parts. When the movable graduated cylinder 15 rotates one revolution, the measuring screw 13 advances or retracts by one pitch (e.g., 0.5 mm). Thus, when the movable graduated cylinder 15 rotates one division, it has rotated 1 / 50 of a revolution. At this point, the measuring screw 13 has moved 1 / 50 × 0.5 mm = 0.01 mm along its axis. Therefore, a value of 0.01 mm can be accurately read using a micrometer.

[0024] like Figure 4 As shown, the present invention optimizes and modifies the measuring structure of the traditional large outside micrometer 10 by adding a set of fast and stable measuring devices 20, which avoids the difficulty of sliding or aligning the large outside micrometer 10 during alignment, and solves the problems of insufficient rigidity of the measuring rod 12 and excessive measurement error of the large outside micrometer 10. Example:

[0025] To solve the above problems, such as Figure 4-10As shown, this embodiment provides a rapid and stable measuring device 20. Utilizing an existing large outside micrometer 10, a rapid and stable measuring device 20 is added to the front end of the large outside micrometer 10 (the end where the measuring rod 12 is installed). This device includes a support base 21 that floats with the large outside micrometer 10, a spring 22, support rods 23 with spherical heads, and M5 fixing screws 24. When not in contact, the four ball-headed support rods 23 are slightly higher than the measuring rod 12 of the large outside micrometer 10. After contacting the workpiece 30 to be measured, each support rod 23 of the rapid and stable measuring device 20 has an individual retraction function, achieving the effect of not interfering with the measurement of the measuring rod 12 of the large outside micrometer 10.

[0026] The rapid and stable measuring device 20 includes a support base 21 and four support rods 23 that are equidistantly spaced around the center of the support base 21. The support base 21 is detachably mounted on one end of the frame 11 of the large outside micrometer 10.

[0027] The support base 21 includes a fixing part 25 and a support base body 26. The fixing part 25 is detachably mounted on one end of the ruler frame 11, and the support rod 21 is disposed on the support base body 26. The head of the support rod 21 is disposed facing the other end of the ruler frame 11, and the head of the support rod 21 can extend or retract relative to one end of the ruler frame 11.

[0028] The fixing part 25 has an inner surface that mates with the outer surface of one end of the ruler frame 11. A fixing threaded hole is provided on the side of the fixing part 25. An M5 fixing screw 24 is provided on the fixing threaded hole. The fixing screw 24 can be screwed into the fixing threaded hole and abuts against the outer surface of one end of the ruler frame 11.

[0029] The support body 26 has a through hole 29 at its center, which allows the measuring rod 12, which is mounted on one end of the ruler frame 11, to pass through.

[0030] The support body 26 has four slots 27 around its center, and the four slots 27 are equidistantly spaced around the center of the support body 26.

[0031] The slot 27 has an opening facing the other end of the ruler 11 and a mounting hole at the bottom of the slot 27. Each support rod 23 is set in the corresponding slot 27. The tail of the support rod 23 has a connecting threaded hole. An M3 adjusting screw 28 is provided on the mounting hole. The adjusting screw 28 can pass through the mounting hole and be screwed into the connecting threaded hole to connect with the support rod 23. A spring 22 is connected between the bottom of the slot 27 and the tail of the support rod 23.

[0032] During the measurement process, the head of the support rod 23 first contacts the workpiece to be measured, which serves to provide auxiliary support and prevent the workpiece 30 to be measured from being scratched.

[0033] When the head of the support rod 23 extends relative to the head of the ruler 11, the extension length of the support rod 23 exceeds that of the measuring rod 12.

[0034] When the head of the support rod 23 is not subjected to external force, the spring 22 is at its natural length, and the initial extension length of the support rod 23 exceeds that of the measuring rod 12.

[0035] The adjusting screw 28 can also be used to adjust the initial extension length of the four support rods 23 to be consistent by adjusting the depth of screwing into the connecting threaded hole.

[0036] When the head of the support rod 23 contacts the workpiece 30 to be measured, the tail of the support rod 23 compresses the spring 22, causing the support rod 23 to retract inward along the slot 27, and each support rod 23 can retract a different distance individually.

[0037] The assembly and usage steps of the rapid and stable measurement device 20 in this embodiment are as follows: 1. Place the four springs 22 into the four slots 27 on the end face of the support body 26 as required.

[0038] 2. Insert the four ball head support rods 23 into the slots 27, abutting against the spring 22. Adjust the M3 adjusting screw 28 to ensure that the four ball head support rods 23 extend to the same length, so that the ball head support rods 23 will not scratch the workpiece 30 when they slide in contact with the surface of the workpiece 20.

[0039] 3. Connect the rapid and stable measuring device 20 to the large outside micrometer 10.

[0040] 4. For example Figure 10 As shown, a large outside micrometer 10 with an added fast and stable measuring device 20 is used to measure the workpiece 30 to be measured.

[0041] As can be seen from the above example, the present invention can effectively solve the problems of insufficient rigidity and easy deformation of the measuring rod caused by the large measurement span of existing large micrometers, as well as low centering accuracy, inconvenient operation, difficulty in alignment, and scratching of the workpiece surface during the measurement process. It reduces measurement errors, improves the deformation resistance of the measuring rod, improves measurement centering and operation convenience, and effectively improves the measurement accuracy and stability of large micrometers in the measurement of large-size workpieces.

[0042] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A rapid and stable measuring device for large outside micrometers, characterized in that, include: Support base, which is detachably mounted on one end of the frame of the large outside micrometer; and Four support rods are equidistantly arranged around the center of the support base. Each support rod has a spherical head, which faces the other end of the ruler frame. The head of the support rod is configured to extend or retract relative to one end of the ruler frame.

2. The rapid and stable measuring device for large outside micrometers according to claim 1, characterized in that, The support base includes a fixing part and a support base body. The fixing part is detachably installed on one end of the ruler frame. The support rod is disposed on the support base body. The support base body allows the measuring rod disposed on one end of the ruler frame to pass through.

3. The rapid and stable measuring device for large outside micrometers according to claim 2, characterized in that, The fixing part has an inner surface that mates with the outer surface of one end of the ruler frame. A fixing threaded hole is provided on the side of the fixing part, and a fixing screw is provided on the fixing threaded hole. The fixing screw is configured to be screwed into the fixing threaded hole and abuts against the outer surface of one end of the ruler frame.

4. The rapid and stable measuring device for large outside micrometers according to claim 2, characterized in that, The support body has a through hole at its center, which allows the measuring rod located at one end of the ruler to pass through.

5. The rapid and stable measuring device for large outside micrometers according to claim 4, characterized in that, The support base body has four slots around its center, and each support rod is disposed in a corresponding slot. The slot has an opening facing the other end of the ruler frame and a mounting hole at the bottom of the slot. The tail of the support rod has a threaded hole, and an adjusting screw is disposed on the mounting hole. The adjusting screw is configured to pass through the mounting hole and screw into the threaded hole to connect with the support rod. A spring is connected between the bottom of the slot and the tail of the support rod.

6. The rapid and stable measuring device for large outside micrometers according to claim 2, characterized in that, During the measurement process, the head of the support rod first contacts the workpiece to be measured, which serves to provide auxiliary support and prevent the workpiece from being scratched.

7. The rapid and stable measuring device for large outside micrometers according to claim 2, characterized in that, When the head of the support rod extends relative to one end of the ruler, the extension length of the support rod exceeds that of the measuring rod.

8. The rapid and stable measuring device for large outside micrometers according to claim 5, characterized in that, When the head of the support rod is not subjected to external force, the spring is at its natural length, and the initial extension length of the support rod exceeds that of the measuring rod.

9. The rapid and stable measuring device for large outside micrometers according to claim 8, characterized in that, The adjusting screw is also configured to adjust the initial extension length of the four support rods to be consistent by adjusting the depth of screwing into the connecting threaded hole.

10. The rapid and stable measuring device for large outside micrometers according to claim 5, characterized in that, When the head of the support rod contacts the workpiece to be measured, the tail of the support rod compresses the spring, causing the support rod to retract inward along the slot, and each support rod is configured to retract individually by a different distance.

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