Measuring device and using method thereof

Abstract

The invention provides a measuring device and a using method thereof.The measuring device comprises a base, a telescopic assembly, a sliding ruler, a first measuring rod and a second measuring rod, a sliding groove is formed in the base in a penetrating mode, the telescopic assembly is arranged at one end of the base and located on one side of the sliding groove, and the sliding ruler is arranged in the sliding groove in a sliding mode; the middle part of the first measuring rod is rotatably arranged at one end, far away from the base, of the telescopic assembly, a first angle measuring sensor is arranged on the first measuring rod, the middle part of the second measuring rod is coaxial with the first measuring rod and is rotatably arranged on the telescopic assembly, and a second angle measuring sensor is arranged on the second measuring rod; one ends of the first measuring rod and the second measuring rod are respectively used for pointing to scales on the sliding ruler, and the other ends are respectively provided with a digital display dial indicator and a length measuring sensor; the first measuring rod and the second measuring rod rotate relative to the telescopic assembly to support the length measuring sensor and other measuring instruments to carry out omnibearing measurement on the size of the object to be measured, other measuring instruments do not need to be searched and replaced in the measuring period, and the measuring efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the field of measurement technology, and in particular, relates to a measurement device and a method of using the same. Background Art

[0002] In order to meet the functional requirements of mechanical products, after correctly and reasonably completing the design of reliability, service life, motion accuracy and other aspects, it is also necessary to carry out manufacturing process design for processing and assembly processes. Among them, a particularly important link is the precision detection in quality assurance measures.

[0003] Measurement is the entire operation process aimed at determining the value of the measured quantity. To measure any object, we must first establish a measurement unit, and secondly, have a measurement method that is suitable for the object being measured. In geometric measurements, vernier calipers, outside micrometers, inside micrometers, depth gauges, height gauges, angle gauges and other measuring instruments are often used.

[0004] However, the specifications of each measuring instrument determine that its use environment and functionality are relatively simple. In the process of completing all geometric measurement of the object to be measured, dozens of measuring instruments may need to be prepared. Finding and replacing measuring instruments is very time-consuming, which makes the measurement efficiency low. Moreover, when facing measurement scenarios with complex internal structures of the object to be measured, these conventional measuring instruments may not be able to be inserted for direct measurement. Summary of the invention

[0005] In response to the deficiencies in the related art, the present application provides a measuring device and a method for using the same, wherein a first measuring rod and a second measuring rod are rotated relative to each other to adjust the maximum distance between their ends, thereby easily reaching into the interior of the object to be measured for measurement, and the first measuring rod and the second measuring rod are rotated relative to the telescopic assembly to flexibly support a length measuring sensor, a digital dial indicator, a first angle measuring sensor, a second angle measuring sensor, and a sliding ruler to perform all-round measurement of the size of the object to be measured. During measurement, there is no need to find or replace other measuring instruments, thereby improving measurement efficiency.

[0006] In one aspect, the present application provides a measuring device, comprising:

[0007] A base, wherein a slide groove is provided on the base;

[0008] A telescopic component is provided at one end of the base, and the telescopic component is located at one side of the slide groove;

[0009] A sliding ruler is slidably disposed in the slide groove, the sliding ruler is provided with a scale, and the sliding ruler slides in the slide groove in a direction close to or away from the telescopic component;

[0010] A first measuring rod, wherein the middle portion of the first measuring rod is rotatably disposed at an end of the telescopic assembly away from the base, and a first angle measurement sensor is disposed on the first measuring rod;

[0011] a second measuring rod, the middle portion of which is coaxial with the first measuring rod and rotatably disposed on the telescopic assembly, and a second angle measuring sensor is disposed on the second measuring rod;

[0012] One end of the first measuring rod and the second measuring rod are respectively used to point to the scale on the sliding ruler, and the other end is respectively used to install a digital display dial indicator and a length measuring sensor.

[0013] In some embodiments, the telescopic assembly further comprises:

[0014] A sleeve rod, the interior of which is hollow and one end of which is disposed on the base;

[0015] A movable rod is slidably disposed in the sleeve rod, and one end of the movable rod away from the base is rotatably connected to the first measuring rod and the second measuring rod, and the movable rod is used to drive the first measuring rod and the second measuring rod to move toward or away from the base.

[0016] In some embodiments, a first through hole is formed at one end of the movable rod away from the base, a second through hole and a third through hole are formed in the middle of the first measuring rod and the second measuring rod, respectively, and the telescopic assembly further comprises:

[0017] A rotating shaft member, the rotating shaft member is inserted into the first through hole, the second through hole and the third through hole;

[0018] A limiting member is detachably connected to the rotating shaft member, and the limiting member cooperates with the rotating shaft member to limit the first measuring rod and the second measuring rod from rotating relative to the movable rod.

[0019] In some embodiments, the measuring device further comprises:

[0020] A sliding sleeve is mounted on the sliding ruler, and the sliding sleeve slides in a direction away from or close to the base. The sliding sleeve is used to assist in observing the corresponding relationship between the first measuring rod or the second measuring rod on the scale of the sliding ruler.

[0021] On the other hand, a method for using the measuring device is also provided, wherein the measuring device is used to measure the size of an object to be measured, wherein the object to be measured is hollow inside and has at least one opening, comprising:

[0022] A calibration step, by rotating the first measuring rod and the second measuring rod so that the two are parallel and aligned with the same scale line on the sliding ruler, driving the first measuring rod and the second measuring rod through the telescopic assembly until the ends of the first measuring rod and the second measuring rod away from the sliding ruler are aligned with the center of the opening of the object to be measured;

[0023] A measuring step, wherein the first measuring rod and / or the second measuring rod extend into the object to be measured through the opening of the object to be measured and rotate relative to the telescopic assembly respectively, so that during the relative rotation, the size of the object to be measured is measured by the length measuring sensor, the digital dial indicator, the first angle measuring sensor, the second angle measuring sensor and the sliding ruler;

[0024] The withdrawal step is to complete the measurement by rotating the first measuring rod and the second measuring rod so that the maximum distance between the ends of the two is not greater than the inner diameter of the opening of the object to be measured, and by moving the base relatively away from the object to be measured so that the first measuring rod and the second measuring rod are withdrawn from the opening of the object to be measured.

[0025] In some embodiments, the measuring step further comprises:

[0026] The step of measuring the spacing is as follows: the first measuring rod and the second measuring rod are rotated so that one end of the first measuring rod and the second measuring rod extending into the opening of the object to be measured respectively contacts the opposite farthest ends of the inner wall of the opening of the object to be measured, and the sliding ruler is made to slide in a direction close to the telescopic component, and different spacings between the first measuring rod and the second measuring rod are measured respectively during the sliding process, thereby obtaining different spacings between the first measuring rod and the second measuring rod on the side of the telescopic component relatively far from the sliding ruler.

[0027] In some embodiments, the inner diameter measuring step further comprises:

[0028] The maximum inner diameter measuring step comprises rotating the first measuring rod and the second measuring rod so that one end of the first measuring rod and the second measuring rod extending into the opening of the object to be measured respectively contacts the opposite farthest ends of the inner wall of the opening of the object to be measured, and sliding the sliding ruler to the end of the first measuring rod and the second measuring rod away from the telescopic assembly to measure the maximum distance between the other ends of the first measuring rod and the second measuring rod, thereby obtaining the maximum inner diameter of the object to be measured.

[0029] In some embodiments, the measuring step further comprises:

[0030] The inner surface circular runout measuring step is to rotate the first measuring rod to make the digital dial indicator contact the inner wall of the opening of the object to be measured, and to rotate the digital dial indicator around the axis of the first measuring rod to relatively circle the inner wall of the opening of the object to be measured, so as to obtain the inner surface circular runout of the object to be measured from the difference in the readings of the digital dial indicator.

[0031] In some embodiments, the measuring step further comprises:

[0032] The depth measurement step includes: rotating the second measuring rod to make the length measuring sensor contact the top measuring point close to the opening of the object to be measured, and then returning the reading of the length measuring sensor to zero; making the base relatively close to the object to be measured, and rotating the second measuring rod to make the length measuring sensor contact the bottom measuring point of the object to be measured located on the bottom wall, so that the depth of the object to be measured can be obtained from the reading of the length measuring sensor at this time.

[0033] In some embodiments, when a tapered groove facing away from the open end of the object to be measured is provided inside the object to be measured, the measuring step further comprises:

[0034] The taper measurement step includes adjusting the telescopic assembly to make the axis of the first measuring rod coincide with the axis of the conical groove, rotating the second measuring rod to abut the end of the conical groove wall closest to the sliding ruler, and using the first angle measuring sensor and the second angle measuring sensor to measure the angle between the first measuring rod and the second measuring rod at this time, thereby obtaining the taper of the conical groove.

[0035] In summary, the present application provides a measuring device and a method for using the same, wherein the maximum spacing between the ends of a first measuring rod and a second measuring rod is adjusted by relative rotation, so that the device can easily extend into the interior of the object to be measured for measurement, and the first measuring rod and the second measuring rod are rotated relative to the telescopic assembly to flexibly support a length measuring sensor, a digital dial indicator, a first angle measuring sensor, a second angle measuring sensor, and a sliding ruler to perform all-round measurement of the dimensions of the object to be measured, and there is no need to find or replace other measuring instruments during measurement, thereby improving measurement efficiency; the first measuring rod and the second measuring rod are supported to perform measurement at any position relative to the base by cooperation with the movable rod and the sleeve rod, thereby enhancing the flexibility of the measuring pair; the relative rotation of the first measuring rod and the second measuring rod is controlled by cooperation with the rotating shaft and the limit member, so that it is convenient to use the first measuring rod or the second measuring rod alone to perform measurement operations.

[0036] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description in the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0038] Figure 1 This is a three-dimensional diagram of the overall structure of the measuring device of this application;

[0039] Figure 2 A schematic diagram of using the measuring device of the present application to measure an object to be measured;

[0040] Figure 3 This is a general flow chart of the method for using the measuring device of the present application.

[0041] In the figure:

[0042] 100, base; 200, telescopic assembly; 300, sliding ruler; 400, first measuring rod; 500, second measuring rod; 600, first angle measuring sensor; 700, second angle measuring sensor; 800, digital dial indicator; 900, length measuring sensor; 1000, sliding sleeve. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0044] In the description of the present application, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 should not be understood as a limitation on the present application.

[0045] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0046] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. Specific embodiment 1

[0048] Reference Figures 1 to 3 , Figure 1 This is a three-dimensional diagram of the overall structure of the measuring device of this application; Figure 2 A schematic diagram of using the measuring device of the present application to measure an object to be measured; Figure 3 This is a general flow chart of the method for using the measuring device of the present application; the specific embodiments are described below in conjunction with the above drawings.

[0049] Reference Figure 1 The present application provides a measuring device, including a base 100, a telescopic assembly 200, a sliding ruler 300, a first measuring rod 400 and a second measuring rod 500; wherein the base 100 is provided with a slide groove, the telescopic assembly 200 is provided at one end of the base 100, the telescopic assembly 200 is located on one side of the slide groove, the sliding ruler 300 is slidably provided in the slide groove, the sliding ruler 300 is provided with a scale, the sliding ruler 300 slides in the slide groove in a direction close to or away from the telescopic assembly 200, and the middle of the first measuring rod 400 The first measuring rod 400 is rotatably disposed at one end of the telescopic assembly 200 away from the base 100, and a first angle measuring sensor 600 is disposed on the first measuring rod 400. The middle part of the second measuring rod 500 is coaxial with the first measuring rod 400 and is rotatably disposed on the telescopic assembly 200. The second measuring rod 500 is provided with a second angle measuring sensor 700. One end of the first measuring rod 400 and the second measuring rod 500 are respectively used to point to the scales on the sliding ruler 300, and the other ends are respectively used to install a digital dial indicator 800 and a length measuring sensor 900.

[0050] Reference Figure 1 In some embodiments, the base 100 is a long strip-shaped component, the base 100 is arranged on a working plane, and a slide groove is passed through the base 100; the telescopic component 200 is arranged at one end of the base 100, and the telescopic component 200 is located on one side of the slide groove, and the telescopic component 200 is used to drive the first measuring rod 400 and the second measuring rod 500 to move away from or close to the base 100 to facilitate the measurement.

[0051] In some embodiments, the telescopic assembly 200 includes a sleeve rod and a movable rod, wherein the sleeve rod is hollow inside and one end of which is fixed on the base 100, the sleeve rod is located on one side of the slide groove, and the movable rod is slidably arranged in the sleeve rod, and the end of the movable rod away from the base 100 is rotatably connected to the first measuring rod 400 and the second measuring rod 500, and the movable rod is used to drive the first measuring rod 400 and the second measuring rod 500 to move toward or away from the base 100, so that the first measuring rod 400 and the second measuring rod 500 can adjust their height positions according to the measuring environment; the movable rod is also used to drive the first measuring rod 400 and the second measuring rod 500 to rotate around the axis of the sleeve rod to increase the flexibility of the first measuring rod 400 and the second measuring rod 500; in some embodiments, the sleeve rod is threadedly connected to the movable rod.

[0052] In some embodiments, a first through hole is formed at one end of the movable rod away from the base 100, and a second through hole and a third through hole are formed in the middle of the first measuring rod 400 and the second measuring rod 500, respectively. The telescopic assembly 200 also includes a rotating shaft and a limiting member. The rotating shaft is formed in the first through hole, the second through hole and the third through hole, so that the first measuring rod 400 and the second measuring rod 500 can rotate relative to the movable rod; the limiting member and the rotating shaft are detachably connected, and the limiting member and the rotating shaft cooperate to limit the rotation of the first measuring rod 400 and the second measuring rod 500 relative to the movable rod.

[0053] Specifically, the rotating shaft component includes but is not limited to studs, screws and studs, and the limiting component includes but is not limited to butterfly nuts, hoops and locks; when the rotating shaft component is a stud, and the limiting component is a butterfly nut, the rotating shaft component is threadedly connected to the limiting component, and the first measuring rod 400, the second measuring rod 500 and the movable rod are respectively clamped by tightening two butterfly nuts from both sides of the stud, so as to achieve the purpose of limiting the relative rotation of the three; in some embodiments, the butterfly nut on one side of the stud is tightened to clamp the first measuring rod 400 and the movable rod, or to clamp the second measuring rod 500 and the movable rod, so that any of the two measuring rods can remain stationary, and the operator can rotate the other measuring rod for measurement.

[0054] Reference Figure 1 and Figure 2 In some embodiments, the sliding ruler 300 is slidably arranged in the slide groove, and the sliding ruler 300 is provided with scale lines to mark the scales. The sliding ruler 300 slides in the slide groove in a direction close to or away from the telescopic component 200. The sliding ruler 300 is also provided with a sliding sleeve 1000, and the sliding sleeve 1000 slides on the sliding ruler 300 in a direction away from or close to the base 100. The sliding sleeve 1000 is used to assist in checking the corresponding relationship between the first measuring rod 400 or the second measuring rod 500 on the scale of the sliding ruler 300.

[0055] Specifically, both ends of the first measuring rod 400 and the second measuring rod 500 are set to be tapered, so as to accurately contact the measuring point on the object to be measured, and at the same time, it is convenient for the operator to observe that they are pointing to a certain scale line on the sliding ruler 300. In actual operation, since there is a situation where the ends of the first measuring rod 400 and the second measuring rod 500 cannot accurately point to a certain scale line, the edge of the sliding sleeve 1000 is regarded as an active scale line to align the ends of the first measuring rod 400 and the second measuring rod 500, which can help the operator to quickly read the readings.

[0056] Reference Figure 1 and Figure 2 In some embodiments, a first angle measurement sensor 600 is provided on one end of the first measuring rod 400 close to the sliding ruler 300, and a second angle measurement sensor 700 is provided on one end of the second measuring rod 500 close to the sliding ruler 300. The first angle measurement sensor 600 and the second angle measurement sensor 700 are communicatively connected to a control center.

[0057] Specifically, the first angle measurement sensor 600 and the second angle measurement sensor 700 include but are not limited to rotary encoders, tilt sensors, and optical sensors, and are used to sense the rotation changes of the first measuring rod 400 and the second measuring rod 500 after zeroing, thereby sending telecommunication signals to the control center.

[0058] In some embodiments, a digital dial indicator 800 is rotatably mounted on one end of the first measuring rod 400 close to the object to be measured, and a length measuring sensor 900 is mounted on one end of the second measuring rod 500 close to the object to be measured.

[0059] Specifically, the digital dial indicator 800 is a precision instrument for measuring the size and shape of an object. The digital dial indicator 800 includes a sensor unit, a signal processing unit, a display unit, a control system and a power supply system. The working principle of the digital dial indicator 800 is to contact the object to be measured through a probe and convert the displacement of the object into an electrical signal. The digital dial indicator 800 usually contacts the object to be measured through its probe and then moves relative to it, thereby converting the displacement into an electrical signal for display, which is used to measure the circular runout of the surface.

[0060] The length measuring sensor 900 includes but is not limited to a linear encoder, a laser rangefinder, an ultrasonic sensor, and a capacitive displacement sensor. When the length measuring sensor 900 is a laser rangefinder and is communicatively connected to the control center, the control center controls the length measuring sensor 900 to return to zero at the initial measuring point position of the object to be measured, and then takes a measurement reading at the end measuring point position of the object to be measured. The length measuring sensor 900 feeds back a telecommunication signal to the control center. Specific embodiment 2

[0062] Reference Figure 3The present application also provides a method for using a measuring device, wherein the size of an object to be measured is measured by using the measuring device in the above-mentioned specific embodiment 1. Since the prior art has a technical problem that the internal measurement environment of the object to be measured is complex and thus it is difficult to perform internal measurement, in this embodiment, a measuring device is used to measure an object to be measured having an internal structure, and the object to be measured is set to be hollow inside and have at least one opening. The method for using the measuring device includes a calibration step S1, a measurement step S2, and a withdrawal step S3.

[0063] In some embodiments, the calibration step S1 includes rotating the first measuring rod 400 and the second measuring rod 500 so that the two are parallel and aligned with the same scale line on the sliding ruler 300, and driving the first measuring rod 400 and the second measuring rod 500 through the telescopic assembly 200 until the ends of the first measuring rod 400 and the second measuring rod 500 away from the sliding ruler 300 are aligned with the center of the opening of the object to be measured.

[0064] Specifically, the operator calibrates the first measuring rod 400 and the second measuring rod 500 before measurement, and keeps the two in a horizontal and parallel state through the rotating shaft and the limit member. The ends of the first measuring rod 400 and the second measuring rod 500 close to one end of the sliding ruler 300 are aligned with the same scale line on the sliding ruler 300. At this time, the distance between the first measuring rod 400 and the second measuring rod 500 is the smallest, which is convenient for subsequent measurement by extending into the interior of the object to be measured through the opening.

[0065] Based on the position of the opening of the object to be measured, the operator drives the first measuring rod 400 and the second measuring rod 500 to move away from or towards the base 100 through the relative sliding of the movable rod and the sleeve rod, until the ends of the first measuring rod 400 and the second measuring rod 500 away from the sliding ruler 300 are aligned with the center of the opening of the object to be measured, so as to leave space margin for the first measuring rod 400 and the second measuring rod 500 in their respective rotation directions for rotation and measurement.

[0066] In some embodiments, the measuring step S2 includes: the first measuring rod 400 and / or the second measuring rod 500 extend into the interior of the object to be measured through the opening of the object to be measured and rotate relative to the telescopic assembly 200 respectively, so that during the relative rotation process, the size of the object to be measured is measured by the length measuring sensor 900, the digital dial indicator 800, the first angle measuring sensor 600, the second angle measuring sensor 700 and the sliding ruler 300.

[0067] Specifically, the operator makes the relative distance between the object to be measured and the base 100 closer, so that the first measuring rod 400 and / or the second measuring rod 500 extend into the interior of the object to be measured through the opening of the object to be measured and rotate relative to the movable rod respectively. Based on the rotation of the first measuring rod 400 and the second measuring rod 500 relative to the movable rod, the length measuring sensor 900, the digital dial indicator 800, the first angle measuring sensor 600, the second angle measuring sensor 700 and the sliding ruler 300 in the measuring device can be flexibly used for measurement.

[0068] It should be noted that, in situations such as measuring the wall thickness of an object to be measured, the first measuring rod 400 or the second measuring rod 500 needs to remain outside the object to be measured, while the other measuring rod extends relatively into the object to be measured. The operator should apply the measuring device of the present application according to the actual measurement situation.

[0069] In some embodiments, the withdrawal step S3 includes rotating the first measuring rod 400 and the second measuring rod 500 so that the maximum distance between the ends thereof is no greater than the inner diameter of the opening of the object to be measured, and moving the base 100 relatively away from the object to be measured so that the first measuring rod 400 and the second measuring rod 500 are withdrawn from the opening of the object to be measured, thereby completing the measurement.

[0070] Specifically, the operator rotates the first measuring rod 400 and the second measuring rod 500 so that the maximum distance between the ends thereof is not greater than the inner diameter of the opening of the object to be measured, so as to avoid the first measuring rod 400 and the second measuring rod 500 from colliding with the inner wall of the object to be measured when withdrawing the first measuring rod 400 and the second measuring rod 500; the operator moves the base 100 relatively away from the object to be measured so as to withdraw the first measuring rod 400 and the second measuring rod 500 from the opening of the object to be measured, thereby completing the measurement.

[0071] In some embodiments, the measuring step S2 further includes a spacing measurement step, by rotating the first measuring rod 400 and the second measuring rod 500 so that one end of the measuring rod 400 and the second measuring rod 500 extending into the opening of the object to be measured respectively contacts the opposite farthest ends of the inner wall of the opening of the object to be measured, and by sliding the sliding ruler 300 in a direction close to the telescopic component 200, and measuring different spacings between the first measuring rod 400 and the second measuring rod 500 during the sliding process, thereby obtaining different spacings between the first measuring rod 400 and the second measuring rod 500 on the side of the telescopic component 200 relatively far away from the sliding ruler 300.

[0072] Specifically, the operator rotates the first measuring rod 400 and the second measuring rod 500 so that one end of the first measuring rod 400 and the second measuring rod 500 extending into the opening of the object to be measured contacts the two opposite ends of the inner wall of the opening of the object to be measured, and rotates the two ends of the first measuring rod 400 and the second measuring rod 500 located on the same side of the telescopic assembly 200 relative to each other to the maximum distance allowed by the inner diameter of the object to be measured. The sliding ruler 300 is made to slide in a direction close to the telescopic assembly 200, and different spacings between the first measuring rod 400 and the second measuring rod 500 are measured during the sliding process. By reading the difference between the scales indicated by the first measuring rod 400 and the second measuring rod 500 on the sliding ruler 300, the different spacings between the first measuring rod 400 and the second measuring rod 500 on the side of the telescopic assembly 200 close to the sliding ruler 300 can be obtained. Because the spacings on the other side of the telescopic assembly 200 correspond to each other, the different spacings between the first measuring rod 400 and the second measuring rod 500 on the side of the telescopic assembly 200 relatively far from the sliding ruler 300 can be obtained.

[0073] Through the spacing measurement step, the operator avoids entering the interior of the object to be measured to measure different inner diameter structures. The operator only needs to find the corresponding position on the side of the telescopic component 200 close to the sliding ruler 300 to measure the corresponding inner diameter through the sliding ruler 300, thereby improving the measurement efficiency.

[0074] In some embodiments, the inner diameter measuring step further includes a maximum inner diameter measuring step, by rotating the first measuring rod 400 and the second measuring rod 500 so that one end extending into the opening of the object to be measured contacts the opposite farthest ends of the inner wall of the opening of the object to be measured respectively, and sliding the sliding ruler 300 to the end of the first measuring rod 400 and the second measuring rod 500 away from the telescopic assembly 200 to measure the maximum distance between the other ends of the first measuring rod 400 and the second measuring rod 500, thereby obtaining the maximum inner diameter of the object to be measured.

[0075] In some embodiments, the measuring step also includes a wall thickness measuring step, by rotating the first measuring rod 400 so that one end of the first measuring rod 400 that extends into the opening of the object to be measured contacts a measuring point on the inner wall of the opening of the object to be measured, and by rotating the second measuring rod 500 so that one end close to the object to be measured contacts a corresponding measuring point on the outer wall of the object to be measured, the sliding ruler 300 slides to the end of the first measuring rod 400 and the second measuring rod 500 that is away from the telescopic assembly 200 to measure the maximum distance between the other ends of the first measuring rod 400 and the second measuring rod 500, thereby obtaining the wall thickness of the object to be measured.

[0076] It should be noted that, based on the inner diameter measurement step and the wall thickness measurement step to obtain the inner diameter and the wall thickness of the object to be measured, the outer diameter and other values ​​of the object to be measured can be obtained by calculation.

[0077] In some embodiments, the measuring step further includes an inner surface circular runout measuring step, by rotating the first measuring rod 400 to make the digital dial indicator 800 contact the inner wall of the opening of the object to be measured, and by rotating the digital dial indicator 800 around the axis of the first measuring rod 400 to relatively circle the inner wall of the opening of the object to be measured, so that the inner surface circular runout of the object to be measured is obtained from the difference in readings of the digital dial indicator 800.

[0078] In some embodiments, the measuring step further includes an outer surface circular runout measuring step, by rotating the first measuring rod 400 to make the digital dial indicator 800 contact the outer wall of the opening of the object to be measured, and by rotating the digital dial indicator 800 around the axis of the first measuring rod 400 to relatively circle the outer wall of the object to be measured, so that the outer surface circular runout of the object to be measured is obtained from the difference in the readings of the digital dial indicator 800.

[0079] It should be noted that the digital dial indicator 800 is rotatably arranged on the first measuring rod 400 to support the digital dial indicator 800 to rotate around the axis of the first measuring rod 400, and the first measuring rod 400 can rotate around the axis of the rotating shaft, and the rotating shaft can rotate around the axis of the sleeve rod based on the sliding connection between the movable rod and the sleeve rod. Therefore, the digital dial indicator 800 can be freely moved to any position for contact measurement based on the axis of the first measuring rod 400, the axis of the rotating shaft and the axis of the sleeve rod.

[0080] In some embodiments, the measuring step further includes a depth measurement step, by rotating the second measuring rod 500 to make the length measuring sensor 900 contact the top measuring point close to the opening of the object to be measured, and then returning the reading of the length measuring sensor 900 to zero, by making the base 100 relatively close to the object to be measured, and by rotating the second measuring rod 500 to make the length measuring sensor 900 contact the bottom measuring point of the object to be measured located on the bottom wall, the depth of the object to be measured is obtained from the reading of the length measuring sensor 900 at this time.

[0081] Specifically, after rotating the second measuring rod 500 to make the length measuring sensor 900 contact the top measuring point close to the opening of the object to be measured, the control center resets the reading of the length measuring sensor 900 to zero, and then makes the base 100 relatively close to the object to be measured so that the second measuring rod 500 can penetrate deeper into the object to be measured, and rotates the second measuring rod 500 to make the length measuring sensor 900 contact the bottom measuring point of the object to be measured located on the bottom wall, so that the depth of the object to be measured is obtained by the reading of the length measuring sensor 900 at this time in the control center.

[0082] Reference Figure 2 It should be noted that the above depth measurement steps are also applicable to the height of a boss protruding toward the open end of the object to be measured, or to the depth of a groove away from the open end of the object to be measured. The operator should flexibly apply it according to the actual situation.

[0083] Reference Figure 2 In some embodiments, when a tapered groove facing away from the open end of the object to be measured is provided inside the object to be measured, the measuring step further includes a taper measuring step, by adjusting the telescopic assembly 200 to make the axis of the first measuring rod 400 coincide with the axis of the tapered groove, by rotating the second measuring rod 500 to abut the end of the tapered groove wall closest to the sliding ruler 300, by using the first angle measuring sensor 600 and the second angle measuring sensor 700 to measure the angle between the first measuring rod 400 and the second measuring rod 500 at this time, thereby obtaining the taper of the tapered groove.

[0084] It should be noted that, in the case where a conical groove facing away from the open end of the object to be tested is provided inside the object to be tested, the depth of the conical groove can be measured by the above-mentioned depth measurement step, and the inner surface circular runout value of the conical groove can be measured by the inner surface circular runout measurement step.

[0085] In some embodiments, the maximum inner diameter measuring step further includes a central axis measuring step. Based on the maximum inner diameter measuring step, the maximum inner diameter of the object to be measured is obtained, and the first measuring rod 400 or the second measuring rod 500 is pointed to any measuring point on the inner wall of the maximum inner diameter of the object to be measured and kept horizontal. Based on the scale of the sliding ruler 300 and through the telescopic assembly 200, the first measuring rod 400 or the second measuring rod 500 is moved toward the center position of the object to be measured by half the maximum inner diameter, and the central axis position of the object to be measured can be found.

[0086] It should be noted that the above-mentioned center axis measurement step can be used to measure the position of the center axis of any groove provided inside the object to be measured, and whose recessed direction is in the same or opposite direction to the opening of the object to be measured; similarly, it can also be used to measure the position of the center axis of any boss provided inside the object to be measured, and whose protruding direction is in the same or opposite direction to the opening of the object to be measured; by making any measuring rod point to the center axis position of the object to be measured, and the other measuring rod point to the center axis position of the groove or boss, the difference between the center axes of the two can be measured by the sliding ruler 300.

[0087] The present application provides a measuring device and a method for using the same. The maximum spacing between the ends of a first measuring rod 400 and a second measuring rod 500 is adjusted by relative rotation between the two measuring rods, so that the measuring rod 400 and the second measuring rod 500 can be easily inserted into the object to be measured for measurement. The first measuring rod 400 and the second measuring rod 500 can be flexibly supported by rotating relative to the telescopic assembly 200 to perform all-round measurement of the size of the object to be measured using a length measuring sensor 900, a digital dial indicator 800, a first angle measuring sensor 600, a second angle measuring sensor 700 and a sliding ruler 300. During the measurement, there is no need to find or replace other measuring instruments, thereby improving the measurement efficiency. The first measuring rod 400 and the second measuring rod 500 can be supported to perform measurement at any position relative to the base 100 by the cooperation of the movable rod and the sleeve rod, thereby enhancing the flexibility of the measuring pair. The first measuring rod 400 and the second measuring rod 500 can be controlled to rotate relative to each other by the cooperation of the rotating shaft and the limiter, thereby facilitating the use of the first measuring rod 400 or the second measuring rod 500 alone to perform measurement operations.

[0088] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0089] The above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present application, which should be included in the scope of the technical solution requested for protection in the present application.

Claims

1. A measuring device, characterized in that: include: A base, wherein a slide groove is provided on the base; A telescopic component is provided at one end of the base, and the telescopic component is located at one side of the slide groove; A sliding ruler is slidably disposed in the slide groove, the sliding ruler is provided with a scale, and the sliding ruler slides in the slide groove in a direction close to or away from the telescopic component; A first measuring rod, wherein the middle portion of the first measuring rod is rotatably disposed at an end of the telescopic assembly away from the base, and a first angle measurement sensor is disposed on the first measuring rod; a second measuring rod, the middle portion of which is coaxial with the first measuring rod and rotatably disposed on the telescopic assembly, and a second angle measuring sensor is disposed on the second measuring rod; One end of the first measuring rod and the second measuring rod are respectively used to point to the scale on the sliding ruler, and the other end is respectively used to install a digital display dial indicator and a length measuring sensor.

2. The measuring device according to claim 1, characterized in that The telescopic assembly further comprises: A sleeve rod, the interior of which is hollow and one end of which is disposed on the base; A movable rod is slidably disposed in the sleeve rod, and one end of the movable rod away from the base is rotatably connected to the first measuring rod and the second measuring rod, and the movable rod is used to drive the first measuring rod and the second measuring rod to move toward or away from the base.

3. The measuring device according to claim 2, characterized in that A first through hole is formed at one end of the movable rod away from the base, a second through hole and a third through hole are formed in the middle of the first measuring rod and the second measuring rod, respectively, and the telescopic assembly further comprises: A rotating shaft member, the rotating shaft member is inserted into the first through hole, the second through hole and the third through hole; A limiting member is detachably connected to the rotating shaft member, and the limiting member cooperates with the rotating shaft member to limit the first measuring rod and the second measuring rod from rotating relative to the movable rod.

4. The measuring device according to claim 1, characterized in that Also includes: A sliding sleeve is mounted on the sliding ruler, and the sliding sleeve slides in a direction away from or close to the base. The sliding sleeve is used to assist in observing the corresponding relationship between the first measuring rod or the second measuring rod on the scale of the sliding ruler.

5. A method for using a measuring device, wherein the measuring device according to any one of claims 1 to 4 is used to measure the size of an object to be measured, wherein the object to be measured is hollow inside and has at least one opening, wherein: include: A calibration step, by rotating the first measuring rod and the second measuring rod so that the two are parallel and aligned with the same scale line on the sliding ruler, driving the first measuring rod and the second measuring rod through the telescopic assembly until the ends of the first measuring rod and the second measuring rod away from the sliding ruler are aligned with the center of the opening of the object to be measured; A measuring step, wherein the first measuring rod and / or the second measuring rod extend into the object to be measured through the opening of the object to be measured and rotate relative to the telescopic assembly respectively, so that during the relative rotation, the size of the object to be measured is measured by the length measuring sensor, the digital dial indicator, the first angle measuring sensor, the second angle measuring sensor and the sliding ruler; The withdrawal step is to complete the measurement by rotating the first measuring rod and the second measuring rod so that the maximum distance between the ends of the two is not greater than the inner diameter of the opening of the object to be measured, and by moving the base relatively away from the object to be measured so that the first measuring rod and the second measuring rod are withdrawn from the opening of the object to be measured.

6. The method for using the measuring device according to claim 5, characterized in that: The measuring step further comprises: The step of measuring the spacing is as follows: the first measuring rod and the second measuring rod are rotated so that one end of the first measuring rod and the second measuring rod extending into the opening of the object to be measured respectively contacts the opposite farthest ends of the inner wall of the opening of the object to be measured, and the sliding ruler is made to slide in a direction close to the telescopic component, and different spacings between the first measuring rod and the second measuring rod are measured respectively during the sliding process, thereby obtaining different spacings between the first measuring rod and the second measuring rod on the side of the telescopic component relatively far from the sliding ruler.

7. The method for using the measuring device according to claim 6, characterized in that: The inner diameter measuring step further comprises: The maximum inner diameter measuring step comprises rotating the first measuring rod and the second measuring rod so that one end of the first measuring rod and the second measuring rod extending into the opening of the object to be measured respectively contacts the opposite farthest ends of the inner wall of the opening of the object to be measured, and sliding the sliding ruler to the end of the first measuring rod and the second measuring rod away from the telescopic assembly to measure the maximum distance between the other ends of the first measuring rod and the second measuring rod, thereby obtaining the maximum inner diameter of the object to be measured.

8. The method for using the measuring device according to claim 5, characterized in that: The measuring step further comprises: The inner surface circular runout measuring step is to rotate the first measuring rod to make the digital dial indicator contact the inner wall of the opening of the object to be measured, and to rotate the digital dial indicator around the axis of the first measuring rod to relatively circle the inner wall of the opening of the object to be measured, so as to obtain the inner surface circular runout of the object to be measured from the difference in the readings of the digital dial indicator.

9. The method for using the measuring device according to claim 5, characterized in that: The measuring step further comprises: The depth measurement step includes: rotating the second measuring rod to make the length measuring sensor contact the top measuring point close to the opening of the object to be measured, and then returning the reading of the length measuring sensor to zero; making the base relatively close to the object to be measured, and rotating the second measuring rod to make the length measuring sensor contact the bottom measuring point of the object to be measured located on the bottom wall, so that the depth of the object to be measured can be obtained from the reading of the length measuring sensor at this time.

10. The method for using the measuring device according to claim 5, characterized in that: When a tapered groove facing away from the open end of the object to be measured is provided inside the object to be measured, the measuring step further comprises: The taper measurement step includes adjusting the telescopic assembly to make the axis of the first measuring rod coincide with the axis of the conical groove, rotating the second measuring rod to abut the end of the conical groove wall closest to the sliding ruler, and using the first angle measuring sensor and the second angle measuring sensor to measure the angle between the first measuring rod and the second measuring rod at this time, thereby obtaining the taper of the conical groove.

Images