Special pneumatic measuring head for measuring center distance of guide rail raceway
By designing a pneumatic probe combined with a cantilever and elastic support device, and using air pressure difference to detect the center distance of the guide rail raceway, the problems of unstable detection accuracy and high cost in the existing technology are solved, and efficient and accurate detection of the center distance of the guide rail raceway is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI UNIV OF SCI & TECH
- Filing Date
- 2025-04-16
- Publication Date
- 2026-04-21
AI Technical Summary
In the existing technology, the detection method of the center distance of the arc raceway of linear guides relies on manual inspection, which is not accurate and has high cost. Automated inspection devices are inefficient and cannot meet the requirements of high precision and high efficiency.
A special pneumatic probe for measuring the center distance of guide rail raceways has been designed. It adopts the pneumatic measurement principle and combines a cantilever device and an elastic support device to detect the center distance of guide rail raceways through air pressure difference, thereby reducing human interference and improving detection accuracy and efficiency.
It achieves low-cost and high-efficiency detection of guide rail raceway center distance, reduces the influence of human factors, improves the accuracy and reliability of detection, and is highly adaptable to automation and computer collaborative processing.
Smart Images
Figure CN224151679U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of precision measurement technology, specifically relating to a special pneumatic probe for measuring the center distance of guide rail raceways. Background Technology
[0002] Rolling linear guide pairs possess motion characteristics such as high precision, high speed, low noise, low friction, and high stability, making them highly valued in the development of precision CNC machine tools. To meet the high precision and high efficiency requirements of CNC machine tools, it is essential to improve and enhance the precision performance of linear guide pairs. While theoretical research on linear guide pairs has progressed rapidly, the research techniques for detecting errors in guide surface parameters are still not mature enough.
[0003] The center distance of the arc raceway in a linear guide is one of the guide surface errors. Its main purpose is to ensure that the installation position and spacing of the guideways and raceways in mechanical equipment meet design requirements, thereby guaranteeing the stability and accuracy of the equipment during operation. It also reduces friction and wear during machine tool operation, extending the machine tool's service life.
[0004] Domestic companies can achieve a center distance accuracy of 0.025-0.03mm for the arc raceways of linear guides, but their methods for detecting this center distance have lagged behind. Traditional methods typically involve manual contact inspection using dial indicators. However, these methods heavily rely on the technical expertise of the inspectors, and varying levels of proficiency can lead to significant differences in measurement accuracy. Automated measurement methods primarily employ photoelectric sensors, but these devices are expensive, and when measuring the center distance of miniature linear guides, optical measurement equipment suffers from low efficiency, cumbersome procedures, and high equipment costs. Utility Model Content
[0005] To overcome the problems existing in the prior art, the purpose of this utility model is to provide a dedicated pneumatic probe for measuring the center distance of guide rail raceways. This probe detects the change in the center distance between the reference guide rail and the sample being measured through a probe. It can detect whether the dimensions of the guide rail sample are within the error range. This makes the measurement operation simple, the manufacturing cost low, and the measurement efficiency high.
[0006] To achieve the aforementioned objective, the technical solution adopted by this utility model is as follows:
[0007] A special pneumatic probe for measuring the center distance of guide rail raceways includes a probe mounting frame 3, with a probe 1 and a right-angle probe 2 installed in the mounting groove inside the probe mounting frame 3;
[0008] The probe mounting frame 3 is equipped with a cantilever device 4 on one side and an elastic support device 5 on the other side. A contact sensor mounting block 29 is provided on the probe mounting frame 3 corresponding to the side of the cantilever device 4.
[0009] The lower end faces of the mounting platforms of the cantilever device 4 and the elastic support device 5 are located on the same plane. The guide rail measuring platform 6 is installed below the measuring device mounting frame 3, and the axis of the measured guide rail and the axis of the measuring device mounting frame 3 are located on the same plane.
[0010] The probe 1 is installed on the left and right sides and the top side inside the probe mounting frame 3, with a total of 6 probes 1. The flexible tube opening of the probe 1 will protrude from the outside of the probe mounting frame 3 and be fixed by the probe mounting frame 3. The other side will be fixed by the probe baffle of the probe mounting frame 3, which will also fix the probe head position of the probe 1.
[0011] The probe 1 includes a probe housing 11a, a contact nozzle hole 12a, a probe sleeve 13a, a probe 14a, a probe 15a, and a spring 16a. The contact nozzle hole 12a is connected to the probe housing 11a on one side with a 4mm thread. The probe 15a is located inside the probe sleeve 13a. The end of the probe 15a is then connected to the probe 14a. The probe sleeve 13a is connected to the probe housing 11a on one side with a 10mm thread.
[0012] The outer shell of the probe 11a is a cylindrical hollow rod with a 4mm deep thread at one end and an exhaust hole 10mm away from the port, and a 10mm deep thread at the other end.
[0013] The 4mm deep threaded side of the probe housing 11a connects to the contact nozzle hole 12a, and the 10mm deep threaded side connects to the probe sleeve 13a. The probe 14a connects to the threaded side of the probe 15a. The probe 14a consists of a ball 14a1 and a ball cap 14a2. The ball 14a1 is a high-precision sphere with a diameter of 6mm. The ball cap 14a2 is a ball seat with a hemispherical groove and a connecting rod at the end with a 45° inclination angle. Due to the thinness of the ball seat end, the ball 14a1 can be embedded in the hemispherical groove of the ball cap 14a2 to achieve rolling. The probe 14a is connected to the probe 15a by threads. The probe 15a is located inside the probe housing 11a, with an airflow injection plane at one end and a screw at the other end. The end face with the airflow jet surface is installed on the side away from the exhaust port from inside the probe housing -11a. At the same time, the probe sleeve -13a is used to limit the displacement distance of the probe -15a, and the contact nozzle hole -12a and the end of the probe -15a are fixed by a spring -16a.
[0014] The right-angle probe 2 is installed on both sides below the probe mounting frame 3. There are a total of 2 right-angle probes 2. The flexible tube opening of the right-angle probe 2 will protrude from the outside of the probe mounting frame 3 and be fixed by the probe mounting frame 3. The other side will be fixed by the probe baffle of the probe mounting frame 3, which will also fix the probe head position of the right-angle probe 2.
[0015] The right-angle probe 2 includes a right-angle probe housing 11b, a right-angle probe contact nozzle hole 12b, a right-angle probe sleeve 13b, a right-angle probe end 14b, a right-angle probe rod 15b, and a right-angle probe spring 16b. The right-angle probe contact nozzle hole 12b is connected to the right-angle probe housing 11b on one side with a 4mm deep thread. The right-angle probe rod 15b is located inside the right-angle probe sleeve 13b. Then, the end of the right-angle probe rod 15b is connected to the right-angle probe end 14b. The right-angle probe sleeve 13b is connected to the right-angle probe housing 11b on one side with a 10mm deep thread.
[0016] The probe mounting frame 3 is connected to the cantilever device 4 and the elastic support device 5 on both sides by bolts. The axis of the probe mounting frame 3 and the axis of the lower guide rail measuring platform 6 are offset to the left on the side with the contact sensor mounting block 29, so as to ensure that the axis of the measured guide rail and the axis of the probe mounting frame 3 are in the same plane.
[0017] The right-angle measuring device housing 11b is a cylindrical hollow rod with a 4mm thread at one end and an exhaust hole 10mm from the port, and a 10mm thread at the other end.
[0018] One end of the 4mm threaded outer shell 11b of the right-angle probe is connected to the nozzle hole 12b of the right-angle probe, and the other end is connected to the sleeve 13b of the right-angle probe rod. The end 14b of the right-angle probe consists of a ball bearing 14b1 and a ball bearing cap 14b2. The ball bearing 14b1 is a high-precision sphere with a diameter of 6mm. The ball bearing cap 14b2 is a ball seat with a hemispherical groove and a right-angle connecting rod connected at a 45° angle at the end. Due to the thinness of the ball seat end, the ball bearing 14b1 can be embedded in the hemispherical groove of the ball bearing cap 14b2 to achieve rolling. It is connected to the right-angle probe rod 15b by a thread. The right-angle probe rod 15b is located inside the outer shell 11b of the right-angle probe, with an airflow injection plane at one end and a screw at the other end. The end face with the airflow jet surface is installed inside the right-angle probe housing 11b on the side away from the exhaust port. At the same time, the right-angle probe sleeve 13b will limit the displacement distance of the right-angle probe 15b. Meanwhile, the right-angle probe contact nozzle hole 12b and the end of the right-angle probe 15b are fixed by the right-angle probe spring 16b.
[0019] The probe mounting frame 3 includes a mounting frame beam 21, a left exhaust support block 22, a left probe mounting block 23, a left mounting base block 24, a right exhaust support block 25, a right probe mounting block 26, a right mounting base block 27, a top rolling reference 28, a left pulley mounting frame 281, a right pulley mounting frame 282, a pulley shaft 283, a bearing 284, a contact sensor mounting block 29, a reference mounting frame 30, a probe reference 31, a left fixing plate 32, a right fixing plate 33, a lower fixing plate 34, and an upper fixing plate 35.
[0020] The two ends of the crossbeam 21 are connected to the left exhaust support block 22, the left probe mounting block 23, the right exhaust support block 25, and the right probe mounting block 26 by bolts. The left exhaust support block 22 is connected to the left probe mounting block 23 by bolts, and the right exhaust support block 25 is connected to the right probe mounting block 26 by bolts. When installing the left probe mounting block 23 and the right probe mounting block 26, the end with the fixing plate mounting groove faces the central axis surface of the crossbeam 21.
[0021] The left exhaust support block 22 is connected to the left probe mounting block 23 by bolts. At the same time, the left mounting base block 24 is connected to the left exhaust support block 22 and the left probe mounting block 23 by bolts respectively. The side with the threaded hole of the contact sensor mounting block 29 faces inward, and the contact sensor mounting block 29 is installed.
[0022] The right exhaust support block 25 is connected to the right probe mounting block 26 by bolts. At the same time, the right mounting base block 27 is connected to the right exhaust support block 25 and the right probe mounting block 26 by bolts respectively. The side with the threaded hole of the contact sensor mounting block 29 faces inward, and the contact sensor mounting block 29 is installed.
[0023] The reference mounting bracket 30 is threadedly connected to the probe reference 31 and installed on the side of the right exhaust support block 25. After the left exhaust support block 22 is connected to the left probe mounting block 23, it will form the mounting groove of the left fixing plate 32 and be fixed by bolts. After the right exhaust support block 25 is connected to the right probe mounting block 26, it will form the mounting groove of the right fixing plate 33 and be fixed by bolts.
[0024] The lower fixing plate 34 and the upper fixing plate 35 are connected to the left mounting base 24, the right mounting base 27, and the mounting frame beam 21 by bolts. The top rolling reference 28 is fitted by a pulley shaft 283 and a bearing 284, and then fixed to the left pulley mounting frame 281, the right pulley mounting frame 282, and nuts, and is installed on both sides of the mounting frame beam 21. The top rolling reference is used to fix the guide rail to be measured on the guide rail measuring platform 6, which can prevent the probe from exceeding the measuring range due to installation errors and prevent the probe from being damaged due to exceeding the measuring range.
[0025] The cantilever device 4 includes a cantilever 41, a cantilever guide rail pair 42, and a cantilever mounting platform 43. The cantilever 41 is connected to the cantilever guide rail pair 42 by bolts, and the cantilever guide rail pair 42 is connected to the cantilever mounting platform 43 by bolts. The cantilever 41 is used to install the probe mounting frame 3 and bear the overall weight of the probe 1, the right-angle probe 2, and the probe mounting frame 3. The cantilever guide rail pair 42 is used to realize the displacement of the probe, thereby completing the detection of the entire guide rail under test. The cantilever mounting platform 43 balances and elastically supports the height difference of the mounting platform 62, ensuring the parallelism between the side head and the guide rail under test.
[0026] The elastic support device 5 includes a fixed plate 51, an elastic support side plate 52, an elastic support base plate 53, a steel ball 54, a ball stud 55, a threaded sleeve 56, a ball threaded sleeve 57, a nut 58, a disc spring 59, an elastic support transition plate 60, an elastic support guide rail pair 61, and an elastic support mounting platform 62.
[0027] The steel ball 54 is connected to the ball head stud 55 by a thread, and the ball head stud 55 is located inside the ball head sleeve 57. The end of the ball head stud 55 is fitted with four disc springs 59. The lower end of the ball head sleeve 57 is connected to the threaded sleeve 56, and the upper end is fitted into one end of the fixing plate 51. The other side of the fixing plate 51 is connected to the nut 58. The two ends of the fixing plate 51 are connected to the elastic support side plate 52 by bolts. The two ends of the elastic support base plate 53 are connected to the elastic support side plate 52 by bolts. The fixing groove on the panel of the elastic support base plate 53 is tangent to the spherical end of the steel ball 54 and is connected to the elastic support transition plate 60 by bolts. The lower end of the elastic support transition plate 60 is connected to the elastic support guide rail pair 61, and the elastic support guide rail pair 61 is connected to the elastic support mounting platform 62 by bolts.
[0028] The guide rail measuring platform 6 includes a platform base 71 and a measuring platform 72. The platform base 71 is connected to the measuring platform 72 by bolts, and the measuring platform 72 is also fixed by bolts during measurement. The measuring platform 72 is 700mm long, and the measuring surface is 600mm long, 63mm wide, and 59mm high. A positioning shoulder is present on the guide rail mounting plane to facilitate the positioning of the guide rail being measured. Four guide rail mounting holes are present on the mounting plane to cooperate with the positioning shoulder for positioning the guide rail.
[0029] The beneficial effects of this utility model are:
[0030] This testing nozzle is designed specifically for detecting the center distance of linear guide rail raceways, incorporating pneumatic measurement principles. It aims to reduce the cost and operational complexity of automatic guide rail surface inspection devices, while simultaneously improving the environmental adaptability and testing efficiency of precision inspection equipment. The nozzle features a flexible support platform, minimizing measurement errors caused by parallelism and straightness issues in the linear guide rail pair, resulting in more accurate rail measurements. Furthermore, the probe within the nozzle indirectly controls the gap between the air inlet nozzle and the measurement plane by contacting the sample raceway surface at its end. The center distance error is then calculated using the air pressure difference. The exhaust duct design further reduces the impact of residual airflow on detection accuracy. This design further enhances guide rail inspection efficiency, reduces human error, and improves the accuracy and reliability of guide rail testing.
[0031] Compared with traditional testing methods, the detection method using this probe in conjunction with a pneumatic gauge is more adaptable, lower in cost, easier to maintain, simpler to operate, and more efficient. It can also be combined with a computer for collaborative processing to achieve automatic detection. Attached Figure Description
[0032] Figure 1 This is a schematic diagram of the structure of the special pneumatic probe for the center distance of the guide rail described in this utility model.
[0033] Figure 2 This is a schematic diagram of the measuring device structure described in this utility model.
[0034] Figure 3 This is a schematic diagram of the overall measuring element described in this utility model.
[0035] Figure 4 This is a schematic diagram of the end of the probe.
[0036] Figure 5 This is a schematic diagram of the right-angle measuring device described in this utility model.
[0037] Figure 6 This is an overall schematic diagram of the right-angle measuring device described in this utility model.
[0038] Figure 7 This is a schematic diagram of the end of a right-angle measuring device.
[0039] Figure 8 This is a schematic diagram of the structure of the measuring device mounting frame described in this utility model. Figure 1 .
[0040] Figure 9 This is a schematic diagram of the structure of the measuring device mounting frame described in this utility model. Figure 2 .
[0041] Figure 10 This is a schematic diagram of the top scrolling reference.
[0042] Figure 11This is a schematic diagram of the cantilever device described in this utility model. Figure 1 .
[0043] Figure 12 This is a schematic diagram of the cantilever device described in this utility model. Figure 2 .
[0044] Figure 13 This is a schematic diagram of the elastic support device described in this utility model.
[0045] Figure 14 This is a schematic diagram of the guide rail measurement platform described in this utility model.
[0046] The components include: 1. Probe; 2. Right-angle probe; 3. Probe mounting bracket; 4. Cantilever device; 5. Elastic support device; 6. Guide rail measuring platform; 11a. Probe housing; 12a. Contact nozzle hole; 13a. Probe sleeve; 14a. Probe I; 14a1. Ball bearing; 14a2. Ball bearing cover; 15a. Probe; 16a. Spring; 11b. Right-angle probe housing; 12b. Right-angle probe contact nozzle hole; 13b. Right-angle probe sleeve; 14b. Right-angle probe end; 14b1. Right-angle probe ball bearing; 14b2. Right-angle probe ball bearing cover; 15b. Right-angle probe; 16b. Right-angle probe spring; 21. Crossbeam; 22. Left side exhaust support block; 23. Left side probe mounting block; 24. Left side mounting base block; 25. Right side exhaust support block; 26. Right side probe mounting block. 27 Right side mounting base block, 28 Top rolling reference, 281 Left side pulley mounting bracket, 282 Right side pulley mounting bracket, 283 Pulley shaft, 284 Bearing, 29 Contact sensor mounting block, 30 Reference mounting bracket, 31 Measuring reference, 32 Left fixing plate, 33 Right fixing plate, 34 Lower fixing plate, 35 Upper fixing plate, 41 Cantilever, 42 Cantilever guide rail pair, 43 Cantilever mounting platform, 51 Fixing plate, 52 Elastic support side plate, 53 Elastic support base plate, 54 Steel ball, 55 Ball head stud, 56 Threaded sleeve, 57 Ball head threaded sleeve, 58 Nut, 59 Disc spring, 60 Elastic support transition plate, 61 Elastic support guide rail pair, 62 Elastic support mounting platform, 71 Platform base, 72 Measuring platform. Detailed Implementation
[0047] The present invention will now be described in further detail with reference to the accompanying drawings.
[0048] Reference Figure 1The special pneumatic probe for guide rail center distance described in this utility model, during final assembly, first completes the assembly of probe 1, right-angle probe 2, cantilever device 4, elastic support device 5, and guide rail measuring platform 6. The left fixing plate 32, right fixing plate 33, lower fixing plate 34, and upper fixing plate 35 in the probe mounting frame 3 are installed after probe 1 and right-angle probe 2 are installed in the probe mounting frame 3. First, after installation, probe 1 and right-angle probe 2 are installed in the probe mounting slot. Then, the left fixing plate 32, right fixing plate 33, lower fixing plate 34, and upper fixing plate 35 are installed to fix the position of the eight probes. Then, the cantilever device 4 is installed on the left side of the probe mounting frame 3 with the contact sensor mounting block 29, and the elastic support device 5 is installed on the right side, ensuring that the mounting platform end faces of the cantilever device 4 and the elastic support device 5 are on the same plane. The guide rail measuring platform 6 is installed below the probe mounting frame 3 to ensure that the axis of the measured guide rail and the axis of the probe mounting frame 3 are on the same plane.
[0049] The guide rail under test is located on the guide rail measurement platform 6. First, the positioning shoulder on the platform is used as a reference, and then it is fixed on the platform through the threaded hole on the platform.
[0050] The probe 1 is used to measure the change in the center distance of the arc raceway of the horizontal guide rail. If the center distance of the raceway of the guide rail changes, the distance between the contact nozzle hole-12a and the probe-15a will change. The error of the center distance of the arc raceway of the guide rail can be obtained by the pressure difference change.
[0051] The right-angle probe 2 is used to measure the change in the center distance of the arc raceway in the vertical direction of the guide rail. If the center distance of the raceway in the vertical direction of the guide rail changes, the distance between the right-angle probe contact nozzle hole 12b and the right-angle probe rod 15b will change. The error of the center distance of the arc raceway of the guide rail can be obtained by measuring the pressure difference. Considering the direction of change of the center distance of the guide rail in the vertical direction and the structural design of the probe mounting frame 3 itself, the right-angle probe 2 is designed to measure the error of the center distance of the arc raceway in the vertical direction.
[0052] The probe mounting frame 3 is used to install the probe 1 and the right-angle probe 2, and together with the cantilever device 4 and the elastic support device 5, it realizes the automatic detection of the guide rail.
[0053] The cantilever device 4 is used to support the probe mounting frame 3 and also serves as the detection reference for the probe, which can reduce the impact of parallelism error between the two guide rail pairs.
[0054] The elastic support device 5 is used to support the measuring device mounting frame 3, and also to reduce the impact of the straightness error, parallelism error and walking run-up error of the guide rail pair on the measurement accuracy.
[0055] The guide rail measurement platform 6 is used to install the guide rail under test, which can provide a suitable testing environment for the probe and reduce the reduction in testing accuracy caused by the installation error of the guide rail under test.
[0056] Reference Figure 2 , Figure 3 , Figure 4 When assembling the probe 1 described in this utility model, firstly, the ball bearing 14a1 and the ball bearing cover 14a2 are combined to form the probe 14a. Then, the airflow nozzle end face of the probe 15a is inserted into the probe sleeve 13a. The probe 14a is then connected to the probe 15a by threads. The probe sleeve 13a is then inserted into the probe housing 11a. At the same time, the probe sleeve 13a also limits the displacement distance of the probe 15a to prevent it from exceeding the stroke. Meanwhile, a contact nozzle hole 12a is installed on the other side, and a spring 16a is placed between the probe 15a and the contact nozzle hole 12a for fixation.
[0057] Reference Figure 5 , Figure 6 , Figure 7 In the assembly of the right-angle probe 2 described in this utility model, firstly, the right-angle probe ball bearing 14b1 and the right-angle probe ball bearing cover 14b2 are combined to form the right-angle probe end 14b. Then, the airflow nozzle end face of the right-angle probe 15b is inserted into the right-angle probe sleeve 13b with the inward side facing inward. The right-angle probe end 14b is then connected to the right-angle probe 15b by threads. Then, the right-angle probe sleeve 13b is inserted into the right-angle probe housing 11b. At the same time, the right-angle probe sleeve 13b also limits the displacement distance of the right-angle probe 15b to prevent it from exceeding the stroke. Meanwhile, the right-angle probe contact nozzle hole 12b is installed on the other side, and the right-angle probe spring 16b is placed between the right-angle probe 15b and the right-angle probe contact nozzle hole 12b for fixation.
[0058] Reference Figure 8 , Figure 9 , Figure 10During assembly, the transducer mounting bracket 3 of this utility model is first connected to the left exhaust support block 22, the left transducer mounting block 23, the right exhaust support block 25, and the right transducer mounting block 26 via bolts, so that the end with the fixing plate mounting groove faces the central axis of the transducer 21. The left exhaust support block 22 is connected to the left transducer mounting block 23 via bolts, and the left mounting base block 24 is connected to the left exhaust support block 22 and the left transducer mounting block 23 via bolts, with the side with the threaded hole of the contact sensor mounting block 29 facing inward, and the contact sensor mounting block 29 is installed. The right exhaust support block 25 is connected to the right transducer mounting block 26 via bolts, and the right mounting base block 27 is connected to the right exhaust support block 25 and the right transducer mounting block 26 via bolts, with the side with the threaded hole of the contact sensor mounting block 29 facing inward, and the contact sensor mounting block 29 is installed. The reference mounting bracket 30 is threadedly connected to the transducer reference 31 and installed on the side of the right exhaust support block 25. The left-side probe mounting block 23 and the left-side exhaust support block 22, when connected, form a mounting groove for the left fixed plate 32, which is then fixed with bolts. Similarly, the right-side probe mounting block 26 and the right-side exhaust support block 25, when connected, form a mounting groove for the right fixed plate 33, which is also fixed with bolts. The lower fixed plate 34 and the upper fixed plate 35 are connected to the left-side mounting base block 24, the right-side mounting base block 27, and the mounting frame crossbeam 21 with bolts. The top rolling reference 28 is fitted by a pulley shaft 283 and a bearing 284, and then fixed to the left-side pulley mounting bracket 281, the right-side pulley mounting bracket 282, and nuts, and is then mounted on both sides of the mounting frame crossbeam 21.
[0059] Reference Figures 11-14 During assembly, the elastic support device of this utility model first connects the steel ball 54 to the ball head stud 55 via threads. Then, the ball head stud 55 is located inside the ball head sleeve 57. Four disc springs 59 are fitted at the end of the ball head stud 55. The lower end of the ball head sleeve 57 is connected to the threaded sleeve 56, and the upper end is fitted into one end of the fixing plate 51. The other side of the fixing plate 51 is connected to the nut 58. The two ends of the fixing plate 51 are connected to the elastic support side plate 52 by bolts. The two ends of the elastic support base plate 53 are connected to the elastic support side plate 52 by bolts. The fixing groove on the panel of the elastic support base plate 53 is tangent to the spherical end of the steel ball 54 and is connected to the elastic support transition plate 60 by bolts. The lower end of the elastic support transition plate 60 is connected to the elastic support guide rail pair 61, and the elastic support guide rail pair 61 is connected to the elastic support mounting platform 62 by bolts.
[0060] The guide rail measuring platform 6 includes a platform base 71 and a measuring platform 72. The platform base 71 is connected to the measuring platform 72 by bolts, and the measuring platform 72 is also fixed by bolts during measurement. The measuring platform 72 is 700mm long, and the measuring surface is 600mm long, 63mm wide, and 59mm high. A positioning shoulder is present on the guide rail mounting plane to facilitate the positioning of the guide rail being measured. Four guide rail mounting holes are present on the mounting plane to cooperate with the positioning shoulder for positioning the guide rail.
[0061] The working principle of this utility model:
[0062] First, the standard guide rail is fixed on the measuring platform 72. Since the probe mounting frame 3 is connected to the cantilever device 4 and the cantilever support device 5, it can move via the cantilever guide rail pair 42 and the elastic support guide rail pair 61, allowing the probe 1 and the right-angle probe 2 to roll along the guide rail raceway. The data collected by the pneumatic measuring instrument is then zeroed. Next, the guide rail to be measured is fixed to the measuring platform 72 with bolts. The probe reference 31 ensures that the horizontal measurement of the guide rail will not exceed its range due to installation errors, and the top rolling reference 28 ensures that the vertical measurement will not exceed its range. During the movement of the cantilever guide rail pair 42 and the elastic support guide rail pair 61, the probe reference 31 and the top rolling reference 28 simultaneously position the guide rail to be measured. The eight probes also... The probe will roll along the track of the test guide. As the probe 1 and the right-angle probe 2 move, the distance between the airflow injection end face of the probe rod 15a and the right-angle probe rod 15b of the probe 1 and the contact nozzle hole 12a and the right-angle probe contact nozzle hole 12b of the probe 2, respectively, changes. As a result, the sensor inside the pneumatic gauge will sense the change in air pressure. At the same time, combined with the photoelectric converter or float of the pneumatic gauge, the change in the center distance between the test guide and the standard guide can be obtained, and the center distance error of the test guide can be further obtained. Because eight probes are used, and each group of opposing probes measures one center distance error, four groups of track center distance errors can be detected at the same time in one measurement. The measurement is convenient and fast, and can effectively reduce measurement errors.
[0063] In summary, the pneumatic probe for guide rail center distance described in this invention combines pneumatic measurement principles to measure the center distance of guide rail raceways and designs a dedicated probe for guide rails. This provides a convenient and efficient detection head for the automation and intelligentization of guide rail raceway center distance error detection. This probe boasts high accuracy, strong adaptability, ease of maintenance, high working efficiency, and good portability. It can be used for detecting center distance errors in linear guide rails, and the device is inexpensive and easy to operate.
Claims
1. A special pneumatic probe for measuring the center distance of guide rail raceways, characterized in that, Includes a probe mounting frame (3), and a probe (1) and a right-angle probe (2) are installed in the mounting groove inside the probe mounting frame (3); The probe mounting frame (3) has a cantilever device (4) installed on one side and an elastic support device (5) installed on the other side. A contact sensor mounting block (29) is provided on the probe mounting frame (3) on the side corresponding to the cantilever device (4). The lower end faces of the mounting platforms of the cantilever device (4) and the elastic support device (5) are located on the same plane. A guide rail measuring platform (6) is installed below the measuring device mounting frame (3), and the axis of the measured guide rail and the axis of the measuring device mounting frame (3) are located on the same plane.
2. The special pneumatic probe for measuring the center distance of the rail track according to claim 1, characterized in that, The probes (1) are installed on the left and right sides and the top side inside the probe mounting frame (3), with a total of 6 probes (1). The flexible tube opening of the probe (1) will protrude out of the outside of the probe mounting frame (3) and be fixed by the probe mounting frame (3). The other side will be fixed by the probe baffle of the probe mounting frame (3) and at the same time, the probe head position of the probe (1) will be fixed.
3. The special pneumatic probe for measuring the center distance of the rail track according to claim 1, characterized in that, The probe (1) includes a probe housing (11a), a contact nozzle hole (12a), a probe sleeve (13a), a probe (14a), a probe (15a), and a spring (16a). The contact nozzle hole (12a) is connected to the probe housing (11a) on one side with a 4mm thread. The probe (15a) is located inside the probe sleeve (13a). Then, the end of the probe (15a) is connected to the probe (14a). The probe sleeve (13a) is connected to the probe housing (11a) on one side with a 10mm thread.
4. The special pneumatic probe for measuring the center distance of the rail track according to claim 3, characterized in that, The outer shell of the probe (11a) is a cylindrical hollow rod with a 4mm deep thread at one end and an exhaust hole 10mm away from the port, and a 10mm deep thread at the other end. The 4mm deep thread side of the probe housing (11a) is connected to the contact nozzle hole (12a), and the 10mm deep thread side is connected to the probe sleeve (13a). The probe (14a) is connected to the threaded side of the probe (15a). The probe (14a) is composed of a ball (14a1) and a ball cover (14a2). The ball (14a1) is a high-precision ball with a diameter of 6mm. The ball cover (14a2) is a ball seat with a hemispherical groove and a connecting rod at the end with an inclination angle of 45°.
5. The special pneumatic probe for measuring the center distance of the rail track according to claim 1, characterized in that, The right-angle probe (2) is installed on both sides below the probe mounting frame (3). There are a total of 2 right-angle probes (2). The flexible tube opening of the right-angle probe (2) will protrude outside the probe mounting frame (3) and be fixed by the probe mounting frame (3). The other side will be fixed by the probe baffle of the probe mounting frame (3) and at the same time, the probe head position of the right-angle probe (2) will be fixed.
6. The special pneumatic probe for measuring the center distance of the rail track according to claim 5, characterized in that, The right-angle probe (2) includes a right-angle probe housing (11b), a right-angle probe contact nozzle hole (12b), a right-angle probe sleeve (13b), a right-angle probe end (14b), a right-angle probe rod (15b), and a right-angle probe spring (16b). The right-angle probe contact nozzle hole (12b) is connected to the right-angle probe housing (11b) on one side with a 4mm deep thread. The right-angle probe rod (15b) is located inside the right-angle probe sleeve (13b). Then, the end of the right-angle probe rod (15b) is connected to the right-angle probe end (14b). The right-angle probe sleeve (13b) is connected to the right-angle probe housing (11b) on one side with a 10mm deep thread.
7. A special pneumatic probe for measuring the center distance of the rails of a guide track according to claim 6, characterized in that The measuring device (3) is connected to the cantilever device (4) and the elastic support device (5) on both sides by bolts. The axis of the measuring device (3) and the axis of the lower guide rail measuring platform (6) are offset to the left on the side with the contact sensor mounting block (29) to ensure that the axis of the measured guide rail and the axis of the measuring device (3) are in the same plane. The right-angle measuring device housing 2 (11b) is a cylindrical hollow rod with a 4mm thread at one end and an exhaust hole 10mm away from the port, and a 10mm thread at the other end. One end of the 4mm thread of the right-angle probe housing (11b) is connected to the right-angle probe contact nozzle hole (12b), and the other end is connected to the right-angle probe sleeve (13b). The right-angle probe end (14b) consists of the right-angle probe ball (14b1) and the right-angle probe ball cover (14b2). The right-angle probe ball (14b1) is a high-precision ball with a diameter of 6mm. The right-angle probe ball cover (14b2) is a ball seat with a hemispherical groove and a right-angle connecting rod is connected at the end with an inclination angle of 45°.
8. The special pneumatic probe for measuring the center distance of the rail track according to claim 7, characterized in that, The probe mounting frame (3) includes a mounting frame beam (21), a left exhaust support block (22), a left probe mounting block (23), a left mounting base block (24), a right exhaust support block (25), a right probe mounting block (26), a right mounting base block (27), a top rolling reference (28), a left pulley mounting frame (281), a right pulley mounting frame (282), a pulley shaft (283), a bearing (284), a contact sensor mounting block (29), a reference mounting frame (30), a probe reference (31), a left fixing plate (32), a right fixing plate (33), a lower fixing plate (34), and an upper fixing plate (35). The two ends of the crossbeam (21) are connected to the left exhaust support block (22), the left probe mounting block (23), the right exhaust support block (25) and the right probe mounting block (26) by bolts. The left exhaust support block (22) is connected to the left probe mounting block (23) by bolts, and the right exhaust support block (25) is connected to the right probe mounting block (26) by bolts. When installing the left probe mounting block (23) and the right probe mounting block (26), the end with the fixing plate mounting groove faces the central axis of the crossbeam (21). The left exhaust support block (22) is connected to the left probe mounting block (23) by bolts. At the same time, the left mounting base block (24) is connected to the left exhaust support block (22) and the left probe mounting block (23) by bolts respectively. The side with the threaded hole of the contact sensor mounting block (29) faces inward, and the contact sensor mounting block (29) is installed. The right exhaust support block (25) is connected to the right probe mounting block (26) by bolts. At the same time, the right mounting base block (27) is connected to the right exhaust support block (25) and the right probe mounting block (26) by bolts respectively. The side with the threaded hole of the contact sensor mounting block (29) faces inward, and the contact sensor mounting block (29) is installed. The reference mounting bracket (30) is threadedly connected to the probe reference (31) and installed on the side of the right exhaust support block (25). After the left exhaust support block (22) is connected to the left probe mounting block (23), it will form the mounting groove of the left fixing plate (32) and be fixed by bolts. After the right exhaust support block (25) is connected to the right probe mounting block (26), it will form the mounting groove of the right fixing plate (33) and be fixed by bolts. The lower fixing plate (34) and the upper fixing plate (35) are connected to the left mounting base block (24), the right mounting base block (27) and the mounting frame beam (21) by bolts. The top rolling reference (28) is fitted by the pulley shaft (283) and the bearing (284) and then fixed to the left pulley mounting frame (281) and the right pulley mounting frame (282) by nuts, and installed on both sides of the mounting frame beam (21).
9. The special purpose air gage probe for measuring the center distance of a guideway raceway of claim 1 wherein, The cantilever device (4) includes a cantilever (41), a cantilever guide rail pair (42), and a cantilever mounting platform (43). The cantilever (41) is connected to the cantilever guide rail pair (42) by bolts, and the cantilever guide rail pair (42) is connected to the cantilever mounting platform (43) by bolts. The cantilever (41) is used to install the probe mounting frame (3) and bear the overall weight of the probe (1), the right-angle probe (2), and the probe mounting frame (3). The cantilever guide rail pair (42) is used to realize the displacement of the probe, thereby completing the detection of the entire guide rail under test. The cantilever mounting platform (43) balances and elastically supports the height difference of the mounting platform (62) to ensure the parallelism between the side head and the guide rail under test.
10. A special pneumatic probe for measuring the center distance of guide rail raceways according to claim 1, characterized in that, The elastic support device (5) includes a fixed plate (51), an elastic support side plate (52), an elastic support base plate (53), a steel ball (54), a ball stud (55), a threaded sleeve (56), a ball threaded sleeve (57), a nut (58), a disc spring (59), an elastic support transition plate (60), an elastic support guide rail pair (61), and an elastic support mounting platform (62). The steel ball (54) is connected to the ball head stud (55) by a thread. The ball head stud (55) is located inside the ball head sleeve (57). Four disc springs (59) are fitted at the end of the ball head stud (55). The lower end of the ball head sleeve (57) is connected to the threaded sleeve (56), and the upper end is fitted into one end of the fixing plate (51). The other side of the fixing plate (51) is connected to the nut (58). The two ends of the fixing plate (51) are connected to the elastic support side plate (52) by bolts. The elastic support base plate (53) is connected to the elastic support side plate (52) by bolts at both ends. The fixing groove on the panel of the elastic support base plate (53) is tangent to the spherical end of the steel ball (54) and is connected to the elastic support transition plate (60) by bolts. The lower end of the elastic support transition plate (60) is connected to the elastic support guide rail pair (61), and the elastic support guide rail pair (61) is connected to the elastic support mounting platform (62) by bolts. The guide rail measuring platform (6) includes a platform base (71) and a measuring platform (72). The platform base (71) is connected to the measuring platform (72) by bolts, and the measuring platform (72) is fixed by bolts during measurement.