Non-complete circle measuring gauge

Abstract

This utility model discloses a non-perfect circle measuring tool, which includes a dial indicator and a holder. The dial indicator is connected to the holder, and its probe is connected to a measuring lever. The measuring lever is connected to the holder via a locking sleeve. A positioning seat and a handle are connected to the holder. By gripping the handle and pressing the measuring lever, the probe of the measuring lever moves away from the positioning seat, where it engages the non-perfect circle to be measured. The probe then rests against the non-perfect circle, and the dial indicator reading is taken to measure the diameter of the non-perfect circle. This utility model provides a non-perfect circle measuring tool that, by pressing the measuring lever, moves the probe away from the positioning seat, where it engages the non-perfect circle to be measured. The probe then rests against the non-perfect circle, and the dial indicator reading is used to determine whether the diameter of the non-perfect circle meets the processing standards. This allows for rapid determination of arc errors, mass production, and ensures the accuracy of non-perfect circle measurements.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing and measurement, and in particular relates to a measuring tool for measuring non-complete circles. Background Technology

[0002] Measurement of circular workpieces is a core aspect of quality control in manufacturing, directly impacting the performance of rotating components, sealing effectiveness, and assembly accuracy. Its core requirements include ensuring geometric parameters meet stringent tolerances, complying with international standards, and enabling feedback optimization during the production process.

[0003] Existing measurement technologies mainly include two types of measuring tools: contact and non-contact. Contact measuring tools (calipers, roundness testers) are difficult to measure incomplete circles and are prone to large errors. Non-contact measuring tools (machine vision, laser scanning) can ensure measurement accuracy, but they are more expensive and require a certain level of technical skill from the measuring personnel, making them difficult to use in factories with mass production.

[0004] Therefore, there is an urgent need to design a non-complete circle measuring tool to solve the problems mentioned above. Utility Model Content

[0005] To address the technical problems mentioned in the background section, such as the difficulty of measuring incomplete circles with contact gauges leading to significant errors, and the high cost and high skill requirements of non-contact gauges, a non-complete circle measuring tool is provided to solve the problem of measuring incomplete circles.

[0006] To achieve the above objectives, the specific technical solution of the non-perfect circle measuring tool of this utility model is as follows: A non-perfect circle measuring instrument includes a dial indicator and a stand. The dial indicator is connected to the stand, and the probe of the dial indicator is connected to a measuring lever. The measuring lever is connected to the stand via a locking sleeve. A positioning seat and a handle are connected to the stand. By gripping the handle and pressing the measuring lever, the probe of the measuring lever is moved away from the positioning seat. The non-perfect circle to be measured is held in place within the positioning seat. The probe is then pressed against the non-perfect circle, and the dial indicator reading is taken to measure the diameter of the non-perfect circle.

[0007] Furthermore, the dial indicator is connected to the indicator frame via a fixed locking nut, so that the dial indicator's probe extends into the indicator frame and connects to the measuring lever.

[0008] Furthermore, the meter holder has symmetrical through holes, with one end of the measuring lever extending out of the through holes to facilitate pressing the measuring lever.

[0009] Furthermore, a spring is connected to the side of the measuring lever away from the probe, and the spring is connected to the dial indicator frame so that the dial indicator pointer rotates when the measuring lever is pressed.

[0010] Furthermore, the positioning seat is cylindrical in shape, and there are interlocking interfaces on the positioning seat at intervals, so that the incomplete circle to be measured can be attached to the positioning seat.

[0011] Furthermore, the card interface and the ejector pin are located on the same plane so that the ejector pin can abut against the incomplete circle to read the diameter value.

[0012] Furthermore, both sides of the measuring lever are connected to a fixing sleeve, and the instrument frame is symmetrically provided with connecting holes, on which a fixing sleeve is connected, so that the measuring lever can be rotated and set inside the instrument frame.

[0013] Furthermore, a limiting bolt is connected to one end of the fixed locking sleeve extending from the gauge frame to limit the measuring lever.

[0014] Furthermore, a handle is fixedly connected to the side of the meter holder away from the dial indicator, so that the testing personnel can hold it for testing.

[0015] Furthermore, multiple springs are spaced apart between the measuring lever and the dial indicator frame to ensure that the dial indicator pointer initially points to the zero mark.

[0016] The non-perfect circle measuring tool of this invention has the following advantages: By pressing the measuring lever, the ejector pin is moved away from the positioning seat, and the incomplete circle to be measured is held in place within the positioning seat. The ejector pin is then placed against the incomplete circle, and the diameter of the incomplete circle to be measured is determined based on the reading of the dial indicator. This allows for a quick assessment of the arc error. This application is easy to use, can be mass-produced and used, and ensures the measurement accuracy of incomplete circles. Attached Figure Description

[0017] Figure 1 This is a top view of the non-complete circle measuring tool of this utility model. Figure 2 This is a bottom view of the non-complete circle measuring tool of this utility model.

[0018] Explanation of markings in the diagram: 1. Dial indicator; 2. Indicator stand; 3. Probe; 4. Measuring lever; 5. Fixed locking sleeve; 6. Positioning seat; 7. Handle; 8. Ejector pin; 9. Incomplete circle; 10. Fixed lock nut; 11. Spring; 12. Snap-fit ​​interface; 13. Limit bolt. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0021] The following is a reference to the appendix. Figure 1 To be continued Figure 2 This invention describes a non-perfect circle measuring tool.

[0022] like Figure 1 As shown, the non-perfect circle measuring instrument of this utility model includes a dial indicator 1 and a frame 2. The dial indicator 1 is connected to the frame 2. The probe 3 of the dial indicator 1 is connected to the measuring lever 4. The measuring lever 4 is connected to the frame 2 through a fixing lock sleeve 5. The frame 2 is connected to a detachable positioning seat 6 and a handle 7. By grasping the handle 7 and pressing the measuring lever 4, the pin 8 of the measuring lever 4 is moved away from the positioning seat 6. The non-perfect circle 9 to be measured is held in the positioning seat 6. The pin 8 is pressed against the non-perfect circle 9, and the value of the dial indicator 1 is read to measure the diameter of the non-perfect circle 9.

[0023] By pressing the measuring lever 4, the ejector pin 8 is moved away from the positioning seat 6, and the incomplete circle 9 to be measured is held in place within the positioning seat 6. The ejector pin 8 is then placed against the incomplete circle 9. The diameter of the incomplete circle 9 to be measured is determined based on the reading of the dial indicator 1, thus quickly identifying the error of the arc. This application is easy to use, can be assembled and used in large quantities, and ensures the measurement accuracy of the incomplete circle 9.

[0024] Furthermore, such as Figure 1 As shown, the dial indicator 1 is connected to the frame 2 via a locking nut 10, so that the probe 3 of the dial indicator 1 extends into the frame 2 and connects to the measuring lever 4; the frame 2 has symmetrical through holes, and one end of the measuring lever 4 extends out of the through holes to facilitate pressing the measuring lever 4; a spring 11 is connected to the side of the measuring lever 4 away from the probe 3, and the spring 11 is connected to the frame 2 so that when the measuring lever 4 is pressed, it drives the pointer of the dial indicator 1 to rotate.

[0025] In this embodiment, preferably, the dial indicator frame 2 is a hollow rectangular frame. The dial indicator 1 is fixedly connected to the upper end of the dial indicator frame 2 by a fixing nut 10. The probe 3 of the dial indicator 1 passes through the fixing nut 10 and extends into the interior of the dial indicator frame 2. A measuring lever 4 is provided inside the dial indicator frame 2, so that the probe 3 is connected to the measuring lever 4. The movement of the measuring lever 4 drives the probe 3 of the dial indicator 1 to move, thereby displaying the diameter error of the non-complete circle 9 to be measured on the dial of the dial indicator 1, so as to achieve the purpose of identifying whether the non-complete circle 9 meets the processing standard.

[0026] The meter holder 2 has symmetrical through holes. Preferably, the diameter of the through holes is much larger than the overall width of the measuring lever 4, so that the two ends of the measuring lever 4 can extend out of the through holes to achieve the purpose of pressing the measuring lever 4.

[0027] The end of the measuring lever 4 away from the pressing end is connected to a pin 8. The pin 8 is located at the upper end of the positioning seat 6. Pressing the measuring lever 4 moves the pin 8 away from the positioning seat 6, fixing the incomplete circle 9 to be measured on the positioning seat 6. Releasing the measuring lever 4 causes the pin 8 to abut against the incomplete circle 9 to be measured. The diameter error of the incomplete circle 9 can then be determined based on the reading indicated by the pointer of the dial indicator 1.

[0028] Furthermore, such as Figure 1 and Figure 2 As shown, the positioning seat 6 is cylindrical in shape, and the positioning seat 6 is provided with card interfaces 12 at intervals so that the incomplete circle 9 to be measured can be locked onto the positioning seat 6; the card interfaces 12 and the ejector pin 8 are located on the same plane so that the ejector pin 8 can abut against the incomplete circle 9 to read the diameter value.

[0029] In this embodiment, preferably, the positioning seat 6 is cylindrical, with an opening on one side, and two card interfaces 12 are provided at intervals along the circumference of the positioning seat 6 to enable the non-complete circle 9 to be measured to be snapped onto the positioning seat 6.

[0030] Furthermore, the card interface 12 of the positioning seat 6 and the ejector pin 8 are on the same plane, so that one side of the incomplete circle 9 is engaged with the card interface 12, and the side away from the card interface 12 is abutted by the ejector pin 8, thereby measuring the diameter error.

[0031] In a preferred embodiment, when not in use, the positioning seat 6 is placed on the dial indicator block so that the accuracy dimensions can be checked before use. The positioning seat 6 has two protruding arcs inside, namely the card interface 12, which is to facilitate the measurement of incomplete circles. The size of the arc inside the positioning seat 6 is equal to the larger size of the circle to be measured. Different positioning seats 6 are required for different workpieces. By changing different positioning seats 6, the error measurement of incomplete circles 9 of different sizes can be completed.

[0032] Furthermore, such as Figure 1As shown, both sides of the measuring lever 4 are connected to a fixing sleeve 5. The instrument frame 2 is symmetrically provided with connecting holes, and the fixing sleeve 5 is connected to the connecting holes so that the measuring lever 4 can be rotated and set inside the instrument frame 2. The fixing sleeve 5 extends out of the instrument frame 2 and is connected to a limit bolt 13 to limit the measuring lever 4. A handle 7 is fixedly connected to the side of the instrument frame 2 away from the dial indicator 1 so that the tester can hold it for testing. Multiple springs 11 are connected between the measuring lever 4 and the instrument frame 2 at intervals so that the pointer of the dial indicator 1 initially points to the zero mark.

[0033] In this embodiment, preferably, the measuring lever 4 is symmetrically connected with a fixing sleeve 5, and a connecting hole is symmetrically provided on the meter frame 2. The fixing sleeves 5 on both sides of the measuring lever 4 are connected to the connecting hole, so that the measuring lever 4 can be rotatably set inside the meter frame 2.

[0034] Preferably, a limit bolt 13 is screwed onto one end of the fixed locking sleeve 5 that extends out of the connecting hole of the meter frame 2 to ensure that the measuring lever 4 does not undergo lateral displacement inside the meter frame 2; a handle 7 is welded on the side of the meter frame 2 away from the dial indicator 1, and the inspector can press the measuring lever 4 with his thumb while gripping the handle 7, which is convenient for the inspector to operate with one hand.

[0035] Multiple springs 11 are connected at intervals between the measuring lever 4 and the bottom surface of the meter holder 2. The multiple springs 11 ensure that the measuring lever 4 does not shake when it is not pressed, and that the measuring lever 4 is reset by the elastic potential energy of the springs 11 after it is pressed, thus saving effort.

[0036] In a preferred embodiment, the dial indicator 1 is provided with a circular scale dial. When the measuring lever 4 is in the initial position, the probe 3 connected to the measuring lever 4 drives the pointer to point to the initial value of the scale dial, which is recorded as 0. Multiple scales are provided at intervals along the circumference of the scale dial. When the ejector pin 8 abuts against the detection part of the incomplete circle 9, the arc of the incomplete circle 9 can be measured by observing whether the scale pointed to by the pointer is within the reasonable range of the workpiece diameter error.

[0037] The working principle of the incomplete circle measuring tool in this invention is as follows: First, grasp the handle 7 and press the measuring lever 4 away from the end of the ejector pin 8, so that the ejector pin 8 is away from the positioning seat 6; Then, the incomplete circle 9 to be tested is attached to the card interface 12 of the positioning seat 6; Then, release the measuring lever 4 so that the pin 8 abuts against the position to be tested on the incomplete circle 9; Finally, the error value of the incomplete circle 9 is determined based on the reading of dial indicator 1.

[0038] Based on a non-complete circle measuring tool, this invention uses a measuring lever 4 to press the end away from the ejector pin 8, causing the ejector pin 8 to move away from the positioning seat 6. The non-complete circle 9 to be measured is then held in place within the positioning seat 6. The measuring lever 4 is then released, allowing the ejector pin 8 to contact the non-complete circle 9. The diameter of the non-complete circle 9 is then determined based on the reading of the dial indicator 1, thus quickly identifying any errors in the arc diameter. This invention is easy to use, can be mass-produced, and ensures the measurement accuracy of the non-complete circle 9.

[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A non-perfect circle measuring tool, characterized in that, It includes a dial indicator and a stand. The dial indicator is connected to the stand, and the probe of the dial indicator is connected to the measuring lever. The measuring lever is connected to the stand by a fixing sleeve. The stand is connected to a positioning seat and a handle. By grasping the handle and pressing the measuring lever, the probe of the measuring lever is moved away from the positioning seat. The non-perfect circle to be measured is held in place by the positioning seat. The probe is placed against the non-perfect circle, and the value of the dial indicator is read to measure the diameter of the non-perfect circle.

2. The non-perfect circle measuring instrument according to claim 1, characterized in that, The dial indicator is connected to the indicator frame via a fixed locking nut, so that the dial indicator's probe extends into the indicator frame and connects to the measuring lever.

3. The non-perfect circle measuring tool according to claim 2, characterized in that, The gauge holder has symmetrical through holes, with one end of the measuring lever extending out of the through holes to facilitate pressing the measuring lever.

4. The non-perfect circle measuring tool according to claim 3, characterized in that, A spring is connected to the side of the measuring lever away from the probe. The spring is connected to the dial indicator frame so that pressing the measuring lever will cause the dial indicator pointer to rotate.

5. The non-perfect circle measuring tool according to claim 1, characterized in that, The positioning seat is cylindrical in shape, and there are interlocking interfaces on the positioning seat so that the incomplete circle to be measured can be attached to the positioning seat.

6. The non-perfect circle measuring tool according to claim 5, characterized in that, The card interface and the ejector pin are located on the same plane so that the ejector pin can abut against the incomplete circle to read the diameter value.

7. The non-perfect circle measuring instrument according to claim 1, characterized in that, Both sides of the measuring lever are connected to a fixing sleeve, and the meter frame is symmetrically provided with connecting holes, on which the fixing sleeves are connected to allow the measuring lever to rotate within the meter frame.

8. The non-perfect circle measuring tool according to claim 7, characterized in that, A locking sleeve extends from one end of the gauge holder and is connected to a limit bolt to limit the measuring lever.

9. The non-perfect circle measuring instrument according to claim 1, characterized in that, A handle is fixedly connected to the side of the dial indicator stand away from the dial indicator, so that the tester can hold it for testing.

10. The non-perfect circle measuring tool according to claim 4, characterized in that, Multiple springs are spaced apart between the measuring lever and the dial indicator frame to ensure that the dial indicator pointer initially points to the zero mark.

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