Pneumatic measuring tool

Abstract

The utility model provides a pneumatic measuring tool, comprising a rack, a top surface of which is provided with a workbench; the measuring device comprises a supporting seat arranged on the workbench and a plurality of caliper gauges used for measuring workpieces placed on the supporting seat; the gas supply device is used for connecting the plurality of caliper gauges to a gas source so as to provide measurement gas for the plurality of caliper gauges; and the electronic control system is communicated with the measuring device and the air supply device so as to transmit electronic data and signals, and the rack is fixed to the rack and is arranged to keep the plurality of caliper gauges above the workbench along a preset orientation. According to the pneumatic measuring tool, the measuring procedure of an existing pneumatic gauge can be simplified, the automation degree is improved, and the product measuring accuracy and the machining quality are more effectively guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of measurement, and in particular relates to a pneumatic measuring tool for measuring the outer diameter of shaft parts. Background Art

[0002] The diameter machining accuracy of shaft parts is an important aspect of the parts machining quality, especially for workpieces with high machining accuracy such as automobile crankshafts and rotor shafts. The machining accuracy of the outer diameter greatly affects the assembly of parts and the performance of the assembled products. Taking ordinary shafts as an example, insufficient outer diameter accuracy of the shaft bearing will cause quality problems such as the bearing not being able to be installed and the bearing running inside the circle. Poor machining of the shaft extension outer diameter will affect customer installation. Therefore, it is usually required that the shaft outer diameter quality inspection is 100% qualified before entering the next process.

[0003] When measuring the outer diameter of shaft parts, it is common to use an outside micrometer. However, the outside micrometer is read manually, and there are at least the following shortcomings: the measurement data is recorded manually and cannot be automatically recorded and stored, nor can the data be directly analyzed. This is not only time-consuming and labor-intensive, but also because it is impossible to determine whether there is any missed inspection or wrong inspection of the workpiece, quality problems cannot be traced; the scale lines of the outside micrometer are small and easy to be misread, resulting in product mismeasurement; and there are obvious deficiencies in measurement accuracy and repeatability. The measurement results of different people are easily biased due to different measuring forces, measurement experience, and reading angles, and cannot meet the requirements of product dimensional accuracy.

[0004] Therefore, in order to improve the measurement accuracy of the outer diameter of shaft parts, pneumatic gauges are used to measure the outer diameter of key parts in some shaft parts inspection processes with high machining accuracy requirements. Pneumatic gauges have many advantages over traditional methods. They are suitable for on-site measurement and can achieve high measurement accuracy. Therefore, their application in mechanical processing is increasing. Pneumatic gauges mainly include gas-to-electric conversion devices and calipers. Before measurement, they are compared with calibration parts to reflect the deviation of shaft diameter size through changes in air pressure or airflow. However, the current pneumatic gauges also have some shortcomings. For example, the caliper has no fixed direction when in the placement position, and the calibration part or workpiece needs to be realigned when in use; when a person holds the caliper close to the workpiece for measurement, the material of the caliper is usually harder than the workpiece after processing, and once it touches the workpiece, it may scratch the workpiece; the air pipe of the pneumatic caliper has the risk of falling off and is easily tangled together; each calibration part corresponds to a size, and there are many of them, and it is easy for the processing error of the calibration part itself to cause deviations in the values ​​at different positions of the calibration part, resulting in deviations in the measurement values ​​of different caliper gauges; since different calibrators correspond to different workpieces, when the workpieces have a wide variety of specifications and types, there are also problems with the placement and protection of the calibrators, which not only take up a large space but are also easy to bump into and are inconvenient for workers to take; there is still room for improvement in the simplification of the measurement procedure. For example, the existing handheld code scanning requires manual work, which consumes manpower and time.

[0005] Therefore, it is necessary to provide an improved pneumatic measuring tool, especially a pneumatic measuring tool for the outer diameter of shaft parts, to overcome the above-mentioned problems in the prior art. Utility Model Content

[0006] The present disclosure is intended to provide a pneumatic measurement tool that at least partially eliminates the deficiencies of the prior art.

[0007] An object of the present disclosure is to provide a pneumatic measuring tool that can simplify the measuring procedure of existing pneumatic gauges and improve the degree of automation.

[0008] Another object of the present disclosure is to provide a pneumatic measuring tool that can more effectively ensure the measurement accuracy and processing quality of a workpiece.

[0009] Another object of the present disclosure is to provide a pneumatic measuring tool with a more regular, simple and compact structure, a high degree of integration and a small footprint.

[0010] Another object of the present disclosure is to provide a pneumatic measuring tool that is easier to assemble and has better assembly stability and air tightness.

[0011] Another object of the present disclosure is to provide a pneumatic measuring tool that can reduce damage to a workpiece that may be caused by collision during the measuring process.

[0012] To achieve at least one of the above-mentioned purposes, according to one aspect of the present disclosure, there is provided a pneumatic measuring tool, comprising: a frame, a top surface of which is provided with a workbench; a measuring device, the measuring device comprising a support base provided on the workbench and a plurality of calipers for measuring a workpiece placed on the support base; an air supply device, the air supply device connecting the calipers to an air source to provide measuring gas for the calipers; and an electronic control system, the electronic control system being connected to the measuring device and the air supply device to transmit electronic data and signals. In particular, the pneumatic measuring tool also comprises a hanger, which is fixed to the frame and is configured to keep the plurality of calipers above the workbench in a predetermined orientation.

[0013] The present disclosure provides the hanging bracket, so that the placement of the caliper has the function of recognizing the direction. The predetermined orientation is, for example, the orientation along which the caliper measures the workpiece. The hanging bracket enables the caliper to be in the measuring direction when it is in the hanging state. When the caliper is used to measure the calibration piece or the workpiece, there is no need to adjust the direction of the caliper, which saves time and reduces the collision between the caliper and the calibration piece or the workpiece caused by unnecessary adjustment actions, and avoids the twisting and entanglement of the pipeline connected to the caliper due to the adjustment of the caliper direction or the non-directional rotation.

[0014] Furthermore, the hanging bracket includes: a vertical frame, which is mounted to the frame perpendicular to the workbench; and a plurality of suspension blocks, which are mounted on the upper end of the vertical frame and extend horizontally toward the support seat, wherein each suspension block has a step hole that penetrates the suspension block in the longitudinal direction, and the step hole can cooperate with a caliper to keep the caliper on the suspension block.

[0015] Furthermore, each caliper includes: a probe, which includes a middle block and two lateral blocks symmetrically arranged on both sides of the middle block; and a handle, wherein the first end of the handle located on the lower side is fixedly connected to the probe, and the second end of the handle located on the upper side has a retaining ring that protrudes radially outward around the outer circumference of the handle.

[0016] Specifically, the stepped hole includes: a large hole, which is configured to hold the snap ring in place in a non-rotatable manner; a small hole, which is located below the large hole and is sized to surround the handle; and an opening, which connects the large hole and the small hole and is arranged facing the support seat to facilitate the handle to enter and exit the stepped hole, wherein the inner wall surface of the large hole includes at least one inner plane segment, and the outer wall surface of the snap ring correspondingly includes at least one outer plane segment, and the inner plane segment and the outer plane segment are configured so that the snap ring can only be fitted in the large hole in a manner that the outer plane segment is aligned with the inner plane segment. When the snap ring is properly matched with the large hole in the above manner, the caliper is suspended on the corresponding suspension block along the predetermined orientation.

[0017] In the present disclosure, the caliper can be easily oriented and maintained on the hanger through the step hole and the clamping ring, which reduces the time for workers to align the caliper and improves efficiency.

[0018] Furthermore, the probe also includes an anti-collision copper block arranged at the lower ends of the two lateral blocks.

[0019] By installing the protective anti-collision copper block at the bottom of the probe, it is possible to avoid scratching the surface of the workpiece when using the caliper and affecting the surface accuracy of the workpiece.

[0020] Further, the intermediate block has a shaped surface facing the workpiece when in use, and includes a cemented carbide positioning block embedded in a position of the shaped surface that contacts the workpiece.

[0021] The carbide positioning block improves the wear resistance and impact resistance of the contact part with the workpiece, reduces the deformation of the contact part caused by collision, wear and possible temperature changes, and can visually assist in orientation. When the probe is in contact with the workpiece for measurement, the probe can be quickly positioned perpendicular to the axis of the workpiece by making the carbide positioning block contact with the surface of the workpiece, thereby preventing measurement deviation caused by the tilt of the probe relative to the axis of the workpiece.

[0022] Furthermore, the pneumatic measuring tool also includes a gas supply device for providing measuring gas to the probe, and the gas supply device includes: a plurality of gas supply ports, which are arranged on the stand and correspond to a suspension block and a caliper respectively; a gas supply pipeline, which connects the gas source with each gas supply port; a plurality of gas pipes, each gas pipe connects a caliper to a gas supply port accordingly; and a gas control device, which is arranged on the gas supply pipeline and is configured to individually control the airflow flowing from the gas supply pipeline to each gas supply port.

[0023] Furthermore, one end of the air pipe is connected to the air supply port via a quick-plug interface installed in the air supply port, and the other end of the air pipe is connected to the air inlet of the caliper through the internal through hole of the handle of the caliper, and the air inlet is arranged at the upper end of the probe.

[0024] By means of the connection structure between the air pipe and the caliper gauge designed as above, in particular by providing the air pipe fixing rubber sleeve, the air pipe and the caliper gauge can be directly and firmly connected to the caliper gauge and are not easy to fall off; and good air tightness is ensured to prevent air leakage; in addition, the air pipe can be effectively prevented from rotating and winding relative to the caliper gauge.

[0025] Furthermore, the suspension block also includes a proximity sensor, which is configured to: when it senses that a caliper is hanging on the suspension block, send a first signal to the electronic control system, and the electronic control system causes the gas control device to prevent the gas in the gas supply pipeline from flowing to the gas supply port based on the first signal; and when it senses that the caliper leaves the suspension block, send a second signal to the electronic control system, and the electronic control system causes the gas control device to allow the gas in the gas supply pipeline to flow to the gas supply port based on the second signal.

[0026] By arranging the proximity sensor for each suspension block, it is possible to supply or cut off air to the caliper more flexibly and accurately, with a high degree of automation and gas saving.

[0027] Furthermore, the measuring device also includes a code reader, which is fixed above the workbench via a bracket, and the height of the bracket can be adjusted so that the code reader is aligned with the code of each type of workpiece placed on the support seat. The code reader is connected to the electronic control system to transmit the read code information to the electronic control system.

[0028] Furthermore, the electronic control system is capable of reading and storing the measurement data from the caliper and associating the measurement data with the coded information of the workpiece and automatically uploading it to the factory measurement database.

[0029] The electronic control system disclosed in the present invention can be connected to the company's production network, wherein the measurement data is bound to the coding information and automatically uploaded to the factory measurement database. Through expansion, the dimension interlocking function can be realized on the internal order system to ensure the quality of the product. The fixed scanning method is more convenient and labor-saving than the handheld scanning method, which can reduce the scanning time and improve work efficiency. The code can be scanned automatically to avoid missing the code or mismatching the workpiece and the code.

[0030] The setting of binding the coding information and measurement data and uploading them to the factory measurement database through the electronic control system realizes the dimension interlocking function, thereby avoiding missed inspection and wrong inspection of workpieces, and preventing unqualified workpieces from flowing into the next process, thus effectively ensuring the quality of the product.

[0031] Furthermore, the measuring device also includes a plurality of calibration parts arranged on the workbench, each calibration part includes: a minimum segment, which defines the minimum value of the outer diameter of the workpiece; a maximum segment, which defines the maximum value of the outer diameter of the workpiece; and a ridge, which is arranged between the minimum segment and the maximum segment, and the two opposite sides of the ridge facing the minimum segment and the maximum segment respectively are vertical planes to provide a reference abutment surface for the caliper.

[0032] By setting the calibration piece integrally on the workbench, the convenience of calibration is improved. By setting a convex edge on the calibration piece, it is avoided that the calibrator is calibrated inaccurately due to tilting relative to the calibration piece (that is, the probe surface is not completely in contact with the calibration piece surface); in addition, it can ensure that the calibrator is basically in the same position of the calibration piece for each calibration, preventing the calibration value from being deviated due to the manufacturing tolerance of the calibration piece itself; at the same time, the calibration efficiency is improved because it is easy to position the calibrator.

[0033] Optionally, the pneumatic measuring workpiece of the present disclosure further includes a pull-out storage box, which includes a double row of vertical hangers for neatly storing spare calipers. The setting of the pull-out storage box improves space utilization, protects the calipers, and is also convenient for manual taking.

[0034] In the present disclosure, by providing the pneumatic measuring tool as described above, the operation is simplified and the product quality is guaranteed. For example, by using a special hanger, the placement of the caliper has a direction recognition function. When the caliper is placed on the rack, it is already in the direction along which the calibration piece or workpiece is measured, which reduces the time workers spend aligning the caliper and improves efficiency; and the pneumatic measuring tool is connected to the company's production network, and the measurement data is automatically uploaded to the factory measurement database by binding a QR code, and a dimension interlocking function is added to the internal order system to ensure the quality of the product; in addition, by improving the caliper, calibration piece, etc., the measurement operation is simplified and the measurement error is reduced, and the measurement device is firmly connected and airtight, with better stability and convenience in use, and the damage to the workpiece is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The features and advantages of one or more embodiments of the present invention will become more easily understood through the following description with reference to the accompanying drawings. The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. The drawings are not drawn to scale and some features may be enlarged or reduced to show the details of specific components. In the drawings:

[0036] Figure 1 is an overall schematic diagram of a pneumatic measurement tool according to an embodiment of the present disclosure;

[0037] Figure 2 yes Figure 1 An enlarged view of section A is shown;

[0038] Figure 3 is a schematic diagram of a suspension block of a pneumatic measurement tool according to an embodiment of the present disclosure;

[0039] Figure 4 is a schematic diagram of a calliper gauge of a pneumatic measuring tool according to an embodiment of the present disclosure;

[0040] Figure 5 yes Figure 2 An enlarged view of section B is shown;

[0041] Figure 6 is a schematic diagram of a probe of a caliper gauge of a pneumatic measuring tool according to an embodiment of the present disclosure;

[0042] Figure 7 is a schematic diagram of a calibration piece of a pneumatic measurement tool according to an embodiment of the present disclosure;

[0043] Figure 8 is a schematic diagram of a drawable storage box for pneumatic measuring tools according to an embodiment of the present disclosure;

[0044] Description of Figure Numbers:

[0045] 10 rack T workbench 12 support seat

[0046] 14 Gas flow adjustment knob

[0047] 20 Hanging rack 22 Stand 24 Suspension block

[0048] C Step hole C0 Opening C1 Large hole

[0049] C2 small hole C10 inner plane section

[0050] 26 air supply port 28 mounting hole P air pipe

[0051] 30 Caliper 31 Probe 310 Air Inlet

[0052] 32 Middle block 33 Side block 34 Protective anti-collision copper block

[0053] 35 Carbide positioning block 38 Snap ring 380 External plane section

[0054] 37 Handle 39 Trachea fixing rubber sleeve 390 Center hole

[0055] 40 Electronic control system

[0056] 50 Code reader 52 Bracket 54 Protective cover

[0057] 60 Calibration piece 61 Minimum value segment 62 Maximum value segment

[0058] 63 ridge 64 base 65 protective cover

[0059] 70 Warning light 80 Pull-out storage box DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0061] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well.

[0062] Figure 1 is an overall schematic diagram of a pneumatic measurement tool according to an embodiment of the present disclosure.

[0063] See also Figure 1 According to the pneumatic measuring tool for measuring the outer diameter of a shaft workpiece according to the embodiment of the present disclosure, the pneumatic measuring tool comprises: a frame 10, the top surface of which is provided with a workbench T; a measuring device, the measuring device comprising a support seat 12 provided on the workbench T and a plurality of calipers 30 for measuring the workpiece placed on the support seat 12; a gas supply device, the gas supply device connecting the calipers 30 to a gas source to provide the calipers 30 with measuring gas; and an electronic control system 40, the electronic control system 40 is connected to the measuring device and the gas supply device to transmit electronic data and signals, and the electronic control system 40 may include, for example, a user interaction platform, a data acquisition device, a data processing device, a data storage device, a detection device, etc. In particular, the pneumatic measuring tool also comprises a hanger 20, the hanger 20 is fixed to the frame 10 and is configured to keep the plurality of calipers 30 above the workbench T in a predetermined orientation. The predetermined orientation is, for example, the direction along which the calipers measure the workpiece.

[0064] The present invention provides the hanging bracket so that the placement of the caliper gauge has a direction recognition function. When the caliper gauge is hung on the hanging bracket, it is already in the measuring direction. When the caliper gauge is used to measure the calibration piece or the workpiece, there is no need to adjust the direction of the caliper gauge, which saves time and reduces the collision between the caliper gauge and the calibration piece or the workpiece caused by unnecessary adjustment actions, and avoids the twisting and entanglement of the pipeline connected to the caliper gauge caused by adjusting the direction of the caliper gauge.

[0065] For further information, see Figures 1 to 3 The hanger 20 includes: a vertical frame 22, which is mounted to the frame 10 perpendicular to the workbench T; and a plurality of suspension blocks 24, which are mounted on the upper end of the vertical frame 22 and extend horizontally toward the support seat 12, wherein each suspension block 24 has a step hole C that penetrates the suspension block 24 along the longitudinal direction, and the step hole C can cooperate with the corresponding structure on the caliper 30 to keep the caliper 30 on the suspension block 24.

[0066] Preferably, the suspension blocks 24 are mounted on the slide rails of the stand 22 so that the positions, spacings and quantities of the suspension blocks 24 can be adjusted according to actual needs.

[0067] See also Figure 2 and Figure 4Each caliper 30 includes: a probe 31, which includes a middle block 32 and two lateral blocks 33 symmetrically arranged on both sides of the middle block 32; and a handle 37, the lower first end of the handle 37 is fixedly connected to the probe 31, and the upper second end of the handle 37 has a retaining ring 38 that surrounds the outer periphery of the handle 37 and protrudes radially outward.

[0068] The snap ring 38 and the stepped hole C have specific shapes and designs, so that by correctly fitting the snap ring 38 into the stepped hole C, the caliper 30 can be held on the hanger 20 in a predetermined orientation.

[0069] Specifically, it will be combined Figures 3 to 5 Let's introduce the structure of the snap ring 38 and the stepped hole C. As shown in the figure, the stepped hole C includes: a large hole C1, which is configured to hold the snap ring 38 in place in a non-rotatable manner; a small hole C2, which is located below the large hole C1 and is sized to surround the handle 37; and an opening C0, which connects the large hole C1 and the small hole C2 and is arranged facing the support seat 12 to facilitate the handle to enter and exit the stepped hole C. In particular, the inner wall surface of the large hole C1 includes at least one inner plane segment C10, and the outer wall surface of the snap ring 38 correspondingly includes at least one outer plane segment 380, and the inner plane segment C10 and the outer plane segment 380 are configured so that the snap ring 38 can only be fitted in the large hole C1 in a manner in which the outer plane segment 380 is aligned with the inner plane segment C10. When the snap ring 38 is properly matched with the large hole C1 in the above manner, the caliper is suspended on the corresponding suspension block in a predetermined orientation, such as Figure 5 shown.

[0070] The large hole and the retaining ring designed above are only an example, and other methods may be used to realize the directional suspension of the caliper by the suspension block. For example, at least one outer plane segment and at least one inner plane segment may be respectively arranged on the small hole C2 and the handle 37, so that when the caliper is suspended on the suspension block, the small hole and the outer surface of the caliper form a shape match to limit the direction of the caliper; in addition, although the diagram shows two symmetrically arranged inner plane segments C10 and two symmetrically arranged outer plane segments 380, it can be understood that the inner plane segments and the outer plane segments may also be one, three or more, as long as they can play a directional and anti-rotation role.

[0071] By means of the step hole C and the snap ring 38, the caliper can be easily oriented and held on the hanger, which reduces the time for workers to align the caliper and improves efficiency.

[0072] See also Figure 4The probe 31 also includes an anti-collision copper block 34 disposed at the lower end of the two lateral blocks 33. The material of the probe is processed and is usually harder than the workpiece. By installing the protective anti-collision copper block 34 at the bottom of the probe, it is possible to avoid scratching the workpiece surface when using the caliper and affecting the workpiece surface accuracy.

[0073] Further, see Figure 4 and Figure 6 The intermediate block 32 has a V-shaped surface facing the workpiece when in use, and includes a carbide positioning block 35 embedded in the V-shaped surface at a position in contact with the workpiece. The carbide positioning block 35 has a higher hardness than other parts of the probe 31, thereby improving the wear resistance and impact resistance of the contact portion between the probe and the workpiece, reducing deformation caused by collision, wear and possible temperature changes, and can visually assist in orientation. When the probe is in contact with the workpiece for measurement, the carbide positioning block 35 can be brought into contact with the workpiece surface to quickly position the probe perpendicular to the axis of the workpiece, thereby preventing measurement deviation caused by the inclination of the probe relative to the axis of the workpiece.

[0074] In addition, although not shown in the figures, the pneumatic measuring tool also includes a gas supply device for providing measuring gas to the probe, and the gas supply device includes: a plurality of gas supply ports 26, which are arranged on the stand 22 and correspond to a suspension block and a caliper respectively; a gas supply pipeline, which connects the gas source with each gas supply port 26; a plurality of gas pipes P, each gas pipe P connects a caliper 30 to a gas supply port 26 respectively; and a gas control device, which is arranged on the gas supply pipeline and is configured to individually control the airflow flowing from the gas supply pipeline to each gas supply port 26.

[0075] As an example, the gas control device includes Figure 2 The gas flow regulating knobs 14 shown in the figure, each gas flow regulating knob 14 correspondingly adjusts the gas flow size supplied to a caliper. However, the gas control device is not limited thereto, and it may also include any control element for detecting and controlling the flow path, flow size, etc. of the gas, such as a switch valve, a flow valve, a sensor, etc.

[0076] Furthermore, the air pipe P is fixedly connected to the caliper 30 as a whole. Specifically, one end of the air pipe P is connected to the air supply port 26 via a quick-plug interface installed in the air supply port 26. When replacing the caliper, the air pipe can be pulled out quickly and labor-savingly through a special U-shaped wrench, thereby improving the replacement efficiency; the other end of the air pipe passes through the internal through hole of the handle 37 of the caliper 30 and is connected to the air inlet 310 of the caliper 30, which is arranged at the upper end of the probe 31. Figure 4 and Figure 6The air inlet 310 has a conical opening, and the air pipe is made of a soft plastic material and has elasticity. The airtight connection between the air pipe and the probe can be achieved by tightly fitting the port of the air pipe on the conical opening of the air inlet 310. In order to further prevent the air pipe from falling off from the air inlet 310, the first end of the handle is rigidly connected to the probe to prevent the air pipe from bending and being stressed relative to the air inlet 310, and a trachea fixing rubber sleeve 39 threadedly connected to the second end of the handle 37 is provided. The trachea fixing rubber sleeve 39 has a central hole 390 for the air pipe P to pass through the handle. The size of the central hole 390 is designed so that the central hole 390 can tightly surround (tighten) the air pipe P to prevent the air pipe P from moving axially relative to the central hole 390.

[0077] By means of the connection structure between the air pipe P and the caliper 30 designed as above, and in particular by providing the air pipe fixing rubber sleeve 39, the air pipe P and the air inlet of the caliper 30 can be directly and firmly connected without being easily dropped off; and good air tightness is ensured to prevent air leakage; in addition, the rotation and winding of the air pipe relative to the caliper are effectively prevented.

[0078] In addition, although not shown, the suspension block 24 also includes a proximity sensor, which is disposed, for example, at Figure 3 In the mounting hole 28 shown, the proximity sensor is configured to: when sensing that a calliper 30 is suspended on the suspension block 24, send a first signal to the electronic control system 40, and the electronic control system 40 causes the gas control device to prevent the gas in the gas supply pipeline from flowing to the gas supply port 26 based on the first signal; and when sensing that the calliper 30 leaves the suspension block 24, send a second signal to the electronic control system 40, and the electronic control system 40 causes the gas control device to allow the gas in the gas supply pipeline to flow to the gas supply port 26 based on the second signal. The gas control device may be, for example, a switch valve associated with a single gas supply port.

[0079] By arranging the proximity sensor for each suspension block, it is possible to supply or cut off air to the caliper more flexibly and accurately, with a high degree of automation and gas saving.

[0080] In the pneumatic measuring tool according to the present disclosure, the measuring device further includes a fixed code reader 50, which is fixed above the workbench T via a bracket 52, and the height of the bracket 52 can be adjusted so that the code reader 50 is aligned with the code of each type of workpiece placed on the support seat 12. In order to avoid collision with the code reader 50 when taking the workpiece, the code reader 50 can be placed in a protective cover 54. The code reader 50 is connected to the electronic control system 40 to transmit the read code information to the electronic control system 40. The electronic control system 40 can read and store the measurement data from the caliper and associate the measurement data with the code information of the workpiece and automatically upload it to the factory measurement database.

[0081] In actual application, before measuring the workpiece, the code reader scans the code (such as a QR code) on the shaft end of the workpiece, and then the electronic control system 40 reads the code information of the workpiece. Then, the corresponding caliper is taken from the hanger to measure the outer diameter of the workpiece. The measurement data can be automatically collected by the data acquisition module in the electronic control system 40 and displayed in real time on the measuring instrument display screen. A warning light 70 (see Figure 2 ), red light means data is unqualified, yellow light means data is at warning value, and green light means data is qualified. Alternatively, the prompt information can also be displayed in different colors on the display screen. The electronic control system 40 of the pneumatic measuring tool can be connected to the company's production network, wherein the measurement data is bound to the coding information and automatically uploaded to the factory measurement database. Through expansion, the dimension interlocking function can be realized on the internal order system, that is, when the next process scans the code of the workpiece, if there is no measurement data of the workpiece or the measurement data is displayed as unqualified, subsequent operations on the workpiece are not allowed, and the workpiece needs to be returned for processing or measurement.

[0082] In practical applications, the barcode reader can be handheld or fixed, or both. For units with a fast production rhythm, the fixed scanning method will be more convenient and labor-saving than the handheld scanning method, which can reduce the scanning time and improve work efficiency. In addition, since the fixed barcode reader 50 can be adjusted to the height of the workpiece code on the support seat, it can automatically scan the code to avoid missing the code or mismatching the workpiece and the code.

[0083] The setting of binding the coding information and measurement data and uploading them to the factory measurement database through the electronic control system realizes the dimension interlocking function, thereby avoiding missed inspection and wrong inspection of workpieces, and preventing unqualified workpieces from flowing into the next process, thus effectively ensuring the quality of the product.

[0084] Further, see Figure 1 and Figure 2 The measuring device further includes a plurality of calibration pieces 60 disposed on the workbench T. Each calibration piece 60 is fixedly connected to the workbench T via a base 64. In order to prevent the calibration piece 60 from being hit by the workpiece, the calibration piece 60 can be placed in a protective cover 65. When the calibration piece 60 is needed to calibrate the calibrator, the protective cover 65 is removed; when the calibration piece 60 is not needed, the protective cover 65 is covered on the outside of the calibration piece 60. By integrally arranging the calibration piece on the workbench T, the calibration of the calibrator is more convenient.

[0085] See Figure 7Each calibration piece 60 includes: a minimum segment 61, which defines the minimum outer diameter of the workpiece; a maximum segment 62, which defines the maximum outer diameter of the workpiece; and a ridge 63, which is arranged between the minimum segment 61 and the maximum segment 62, and the two opposite sides of the ridge 63 facing the minimum segment 61 and the maximum segment 62 are vertical planes to provide a reference abutment surface for the caliper 30.

[0086] By providing the ridge 63, when calibrating the caliper, the side of the caliper can be fitted against the side of the ridge to provide a positioning reference for the caliper, thereby preventing the caliper from being calibrated inaccurately due to tilting relative to the calibration piece (i.e., the probe surface does not completely fit the surface of the calibration piece). In addition, by fitting the side of the caliper against the side of the ridge for measurement, it can be ensured that the caliper is basically in the same position of the calibration piece for each calibration, thereby preventing the calibration value from being deviated due to the manufacturing tolerance of the calibration piece itself. At the same time, the calibration efficiency is improved because it is easy to position the calibrator.

[0087] In addition, considering that different types of calipers are used for different workpieces, the number of calipers is relatively large. In order to facilitate the storage of the calipers, the pneumatic measuring workpiece according to the present disclosure also includes a drawable storage box 80, such as Figure 8 As shown, the drawable storage box includes a double row of vertical hangers for neatly storing the spare calipers. The drawable storage box 80 can be separately arranged at any position convenient for taking the calipers, such as the bottom of the rack. In the case of a cabinet, the drawable storage box 80 can also be arranged integrally with the cabinet. The arrangement of the drawable storage box 80 improves the space utilization rate, protects the calipers, and is also convenient for manual taking.

[0088] In the present disclosure, by providing a pneumatic measuring tool as described in the above embodiment, a special hanging rack is used to make the placement of the calibrator have a direction recognition function. When the calibrator is placed on the rack, it is already in the direction along which the calibration part or the workpiece is measured, thereby reducing the time for workers to align the calibrator and improving efficiency. The pneumatic measuring tool is connected to the company's production network, and the measurement data is bound to a QR code and automatically uploaded to the factory measurement database. A dimensional interlocking function is added to the internal order system to ensure product quality. In addition, through improvements to the calibrator, calibration parts, etc., the measurement operation is simplified and the measurement error is reduced. The measuring device is firmly connected and airtight, has better stability and convenience in use, and reduces damage to the workpiece.

[0089] Summary: The pneumatic measuring tool disclosed in the present invention mainly includes the following parts: a measuring device, an air supply device and an electronic control system. The main improvements are:

[0090] ① Provide a caliper hanger to hold multiple calipers above the workbench in a predetermined orientation.

[0091] ② The electronic control system is connected to the company's production network, which binds the measurement data with the coding information and automatically uploads them to the factory measurement database, so that the dimension interlocking function can be realized in the internal order system.

[0092] The advantages of the pneumatic measuring tool disclosed in the present invention are as follows:

[0093] ① By providing a hanging bracket, the placement of the caliper gauge has a direction recognition function, which not only saves the time of adjusting the direction of the caliper gauge to align the workpiece, but also reduces the collision between the caliper gauge and the calibration part or the workpiece due to unnecessary adjustment actions, and avoids the twisting and entanglement of the pipeline connected to the caliper gauge due to adjusting the direction of the caliper gauge.

[0094] ② The caliper can be easily kept on the hanger in a predetermined orientation through the shape matching of the step hole and the clamping ring structure. It is simple to operate and can effectively orient.

[0095] ③ Install a protective anti-collision copper block at the bottom of the probe to avoid scratching the workpiece surface and affecting the workpiece surface accuracy when using the caliper.

[0096] ④ A carbide positioning block is set at the position where the probe contacts the workpiece, which improves the wear resistance and impact resistance of the probe, reduces the deformation of the contact surface, and plays a role in assisting the orientation of the probe relative to the workpiece, preventing measurement deviation caused by the tilt of the probe.

[0097] ⑤ Provide an air pipe fixing rubber sleeve at the end of the handle, so that the air pipe and the air inlet of the caliper can be directly and firmly connected without being easily removed; and ensure good air tightness to prevent air leakage; in addition, it also effectively prevents the air pipe from rotating and winding relative to the caliper.

[0098] ⑥ The proximity sensor is provided for each suspension block, so that the caliper can be supplied with or cut off air more flexibly and accurately, with a high degree of automation and gas saving.

[0099] ⑦ The electronic control system can read and store the measurement data from the caliper and associate the measurement data with the coding information of the workpiece and automatically upload it to the factory measurement database, realizing the dimensional interlocking function on the internal order system, effectively ensuring the quality of the product.

[0100] ⑧Provide a fixed code reader, which makes code scanning more convenient and labor-saving, and improves work efficiency. In addition, the fixed code reader can automatically scan the code to avoid missing the code or mismatching the workpiece and the code.

[0101] ⑨ By arranging the calibration piece integrally on the workbench, the calibration of the calibrator is made more convenient.

[0102] ⑩ By setting a convex ridge on the calibration piece, a positioning reference is provided for the calibrator, thereby avoiding inaccurate calibration due to the calibrator tilting relative to the calibration piece, and preventing deviation in the calibration value due to the manufacturing tolerance of the calibration piece itself. At the same time, the calibration efficiency is improved because it is easy to position the calibrator.

[0103] A pull-out storage box is provided to improve space utilization, protect the card gauge, and facilitate manual removal.

[0104] Various embodiments and variations of the present invention have been described in detail above, but those skilled in the art should understand that the present invention is not limited to the above-mentioned specific embodiments and variations but may include other possible combinations and combinations, and other variations and modifications may be implemented by those skilled in the art without departing from the essence and scope of the present invention. All these variations and modifications fall within the scope of the present invention. Moreover, all components described herein may be replaced by other technically equivalent components.

Claims

1. A pneumatic measuring tool comprising: A frame (10), wherein a workbench (T) is provided on the top surface of the frame (10); A measuring device, comprising a support seat (12) arranged on the workbench (T) and a plurality of calipers (30) for measuring a workpiece placed on the support seat (12); a gas supply device, the gas supply device connecting the plurality of calipers (30) to a gas source to provide the plurality of calipers (30) with measuring gas; and an electronic control system (40), the electronic control system (40) being in communication with the measuring device and the gas supply device, It is characterized in that It also includes a hanger (20) which is fixed to the frame (10) and is configured to hold the plurality of calipers (30) above the workbench (T) in a predetermined orientation.

2. The pneumatic measuring tool according to claim 1, characterized in that: The hanger (20) comprises: A stand (22), the stand (22) being mounted on the frame (10); and A plurality of suspension blocks (24), the plurality of suspension blocks (24) being mounted on the upper end of the stand (22) and extending laterally, Each suspension block (24) has a stepped hole (C) penetrating the suspension block (24) in the longitudinal direction for holding one of the plurality of calipers (30).

3. The pneumatic measuring tool according to claim 2, characterized in that: Each caliper (30) comprises: A probe (31), the probe (31) comprising a middle block (32) and two lateral blocks (33) symmetrically arranged on both sides of the middle block (32); and A handle (37), wherein a first end of the handle (37) is fixedly connected to the probe (31), and a second end of the handle (37) has a retaining ring (38) which protrudes radially outward around the outer circumference of the handle (37), and the retaining ring (38) is configured to limit the predetermined orientation of the caliper (30) by cooperating with the step hole (C).

4. The pneumatic measuring tool according to claim 3, characterized in that: The step hole (C) comprises: a large hole (C1) configured to hold the snap ring (38) in place in a non-rotatable manner; a small hole (C2) located below the large hole (C1) and sized to surround the handle (37); and An opening (C0), the opening (C0) communicating with the large hole (C1) and the small hole (C2) and arranged facing the support seat (12) so as to facilitate the handle to enter and exit the stepped hole (C); The inner wall surface of the large hole (C1) includes at least one inner plane segment (C10), and the outer wall surface of the retaining ring (38) correspondingly includes at least one outer plane segment (380), so that the retaining ring (38) can only be fitted in the large hole (C1) in a manner that the at least one outer plane segment is aligned with the at least one inner plane segment, and when the retaining ring (38) is correctly matched with the large hole (C1), the corresponding caliper is suspended on the corresponding suspension block along the predetermined orientation.

5. The pneumatic measuring tool according to claim 3, characterized in that: The measuring head (31) also includes an anti-collision copper block (34) arranged at the lower ends of the two lateral blocks (33) to prevent damage to the workpiece.

6. The pneumatic measuring tool according to claim 3, characterized in that: The intermediate block (32) has a V-shaped surface facing the workpiece when in use, and includes a cemented carbide positioning block (35) embedded in a position of the V-shaped surface in contact with the workpiece.

7. The pneumatic measuring tool according to claim 3, characterized in that: The gas supply device comprises: A plurality of air supply ports (26), wherein the plurality of air supply ports (26) are arranged on the stand (22) and correspond to a suspension block and a caliper respectively; an air supply pipeline, the air supply pipeline connecting the air source with the plurality of air supply ports (26); a plurality of air pipes (P), each of which connects a caliper (30) to a corresponding air supply port (26); and A gas control device is provided on the gas supply pipeline and is configured to individually control the gas flow from the gas supply pipeline to each gas supply port (26).

8. The pneumatic measuring tool according to claim 7, characterized in that: One end of each air pipe (P) is connected to the corresponding air supply port (26) via a quick-plug interface, and the other end of the air pipe (P) is connected to the air inlet (310) of the probe (31) of the caliper (30) through the internal through hole of the handle (37) of the corresponding caliper (30).

9. The pneumatic measuring tool according to claim 8, characterized in that: Each caliper (30) further comprises a trachea fixing rubber sleeve (39) threadedly connected to the second end of the handle (37), wherein the trachea fixing rubber sleeve (39) has a central hole (390) for the corresponding trachea (P) to pass through and tightly surrounds the trachea (P).

10. The pneumatic measuring tool according to claim 7, characterized in that: Each suspension block (24) also includes a proximity sensor, wherein the proximity sensor is configured to: When it is sensed that a calliper (30) is suspended on the suspension block (24), a first signal is sent to the electronic control system (40), and the electronic control system (40) causes the gas control device to prevent the gas in the gas supply pipeline from flowing to the gas supply port (26) corresponding to the suspension block (24) based on the first signal; and and When it is sensed that the caliper (30) leaves the suspension block (24), the electronic control system (40) A second signal is sent, and based on the second signal, the electronic control system (40) causes the gas control device to allow the gas in the gas supply pipeline to flow to the gas supply port (26) corresponding to the suspension block (24).

11. The pneumatic measuring tool according to claim 1, characterized in that: The measuring device further comprises a code reader (50), wherein: The code reader (50) is fixed above the workbench (T) via a bracket (52), and the height of the bracket (52) can be adjusted so that the code reader (50) is aligned with the code of the workpiece placed on the support seat (12); and The code reader (50) is connected to the electronic control system (40) and sends the read coded information to the electronic control system (40).

12. The pneumatic measuring tool according to claim 11, characterized in that: The electronic control system (40) reads and stores the measurement data from the caliper and binds the measurement data with the coding information of the workpiece and uploads the data to a factory measurement database.

13. The pneumatic measuring tool according to any one of claims 1 to 12, characterized in that: The predetermined orientation is the orientation along which the plurality of calipers measure the workpiece.

14. The pneumatic measuring tool according to any one of claims 1 to 12, characterized in that: The measuring device further comprises a calibration piece (60) arranged on the workbench (T), wherein the calibration piece (60) comprises: A minimum value section (61), wherein the minimum value section (61) defines a minimum value of an outer diameter of the workpiece; a maximum value section (62), the maximum value section (62) defining a maximum value of an outer diameter of the workpiece; and A convex ridge (63) is arranged between the minimum segment (61) and the maximum segment (62), and two opposite side surfaces of the convex ridge (63) facing the minimum segment (61) and the maximum segment (62) are constructed as vertical planes to provide a reference abutment surface for the caliper (30).

15. The pneumatic measuring tool according to any one of claims 1 to 12, characterized in that: It also includes a pull-out storage box (80), which includes a double row of vertical hanging racks for storing spare calipers.

Images