Dustproof structure of three-coordinate measuring machine

Abstract

This invention provides a dustproof protection structure for a coordinate measuring machine (CMM), relating to the field of dust prevention for CMMs. The dustproof protection structure includes an X-axis arm, a Z-axis arm, and a measuring head base. The Z-axis arm is mounted on the X-axis arm and is used to move along the X and Z axes. The measuring head base is mounted on the bottom end of the Z-axis arm. It also includes a self-cleaning measuring head component. After the measuring head has been used for a period of time, the dustproof protection structure seals it with a protective cover and sprays cleaning liquid (alcohol, etc.) and high-pressure airflow through nozzles to periodically clean the ruby ​​measuring ball and probe. The waste liquid and exhaust gas generated during cleaning are collected in a negative pressure tank, having no impact on the measurement environment and reducing the frequency of manual cleaning. Furthermore, frequent cleaning of the ruby ​​measuring ball significantly improves measurement accuracy, reducing the probability of damage, incomplete cleaning, and errors that may occur during manual cleaning.

Description

Technical Field

[0001] This invention relates to the field of dust prevention for coordinate measuring machines (CMMs), specifically to a dust protection structure for CMMs. Background Technology

[0002] Coordinate measuring machines (CMMs) are widely used in industries such as machinery, electronics, instrumentation, and plastics. They are one of the most efficient methods for measuring and obtaining dimensional data because they can replace various surface measuring tools and expensive combination gauges, reducing the time required for complex measurement tasks from hours to minutes—an effect unattainable by other instruments. As a high-precision measuring device, CMMs have extremely high requirements for their working environment. Dust is one of the main factors affecting their accuracy, stability, and service life. Effective dust prevention measures are crucial for ensuring measurement accuracy and equipment maintenance.

[0003] Current coordinate measuring machines (CMMs) possess their own protective systems, including: Air bearing protection: The CMM's guide rails and air bearings are extremely sensitive to dust. Ensure the equipment's primary and precision air filters are replaced regularly. This is the first line of defense against dust scratching the guide rails, causing alarms or decreased accuracy. Grating ruler protection: The grating ruler is the measuring "scale" and must be kept absolutely clean. Ensure its protective cover is well-sealed; never blow dust directly onto the grating ruler with your mouth (use a professional ear syringe). Outer cover and bellows cover: Make full use of the original metal or plastic outer cover provided with the equipment. For moving bridge CMMs, the bellows cover is a crucial barrier protecting the Z-axis and probe components; it must be kept intact, and any damaged parts should be replaced immediately.

[0004] However, the measuring head, also known as a probe, in current technology is a sensor system used by coordinate measuring machines (CMMs) to probe the surface of a workpiece and emit trigger or scanning signals. It is mounted at the lower end of the Z-axis spindle and serves as the interface between the measuring machine and the physical world. It is similar to a high-precision "switch," containing sophisticated three-dimensional mechanisms (such as springs, leaf springs, or strain gauges) and electronic contacts. When the probe's ball contacts the workpiece in any direction and undergoes a slight deflection (typically a few micrometers), an electrical signal is triggered. Because it frequently comes into contact with the measured components and lacks protective features, the following effects exist.

[0005] Impact on repeatability: If dust particles adhere to the contact surface of the probe body, the probe connection port (such as M2 thread, RENISHAW's Kinematic automatic joint), or the standard ball, it will cause the position repeatability to deteriorate each time it is installed, introducing systematic errors.

[0006] Signal interference: For optical transmission probes (such as rotatable probes like the PH10M), dust can block the infrared communication window, causing communication failure.

[0007] Damage to the mechanism: Hard particles entering the precision moving parts inside the probe (such as the bearings of a rotatable probe) can cause scratches and jamming.

[0008] Existing technologies often rely on manual periodic wiping and cleaning, which has problems such as high learning difficulty, incomplete cleaning, damage to precision, and contamination of the testing environment by cleaning equipment. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides a dustproof protection structure for a coordinate measuring machine, solving the problems mentioned in the background section.

[0010] To achieve the above objectives, the present invention is implemented through the following technical solution: a dustproof protection structure for a coordinate measuring machine, including an X-axis arm, a Z-axis arm, and a measuring head base. The Z-axis arm is mounted on the X-axis arm to enable the Z-axis arm to move along the X-axis and Z-axis. The measuring head base is mounted on the bottom end of the Z-axis arm and also includes a self-cleaning measuring head component. The self-cleaning measuring head component includes a measuring head, and the self-cleaning measuring head component can be used to automatically clean the measuring head; The self-cleaning measuring head component is separate from the measuring head base. A servo YZ axis rail is installed on the outside of the Z-axis arm. The self-cleaning measuring head component is installed on the servo YZ axis rail to enable the self-cleaning measuring head component to move to the measuring head base for engagement and to move to one side of the Z-axis arm. The Z-axis arm has a hollow structure inside, which contains a cleaning and protection component and a dust and chip removal assembly. The cleaning and protection component extends out of the Z-axis arm and wraps around and protects the measuring head when the self-cleaning measuring head component moves to one side of the Z-axis arm. When it is inside the Z-axis arm, it can work with the dust and chip removal assembly to achieve self-cleaning.

[0011] Preferably, the self-cleaning measuring head component further includes a sensing base and a measuring head mounting platform. The measuring head mounting platform is installed at the bottom of the sensing base, and the sensing base and measuring head base can be used for coordinate measuring machine measurement when combined. The measuring head is mounted on the measuring head mounting platform. The sensing base has two sets of symmetrically distributed nozzles. The nozzles are mounted in the sensing base using a servo base, with their lower ends extending out of the sensing base. The nozzles can swing relative to the sensing base using the servo base to adjust the angle of the ruby ​​measuring ball aligned with the measuring head, and are used to spray cleaning fluid and high-pressure airflow onto the ruby ​​measuring ball. It also includes a rotating base, which is fixedly installed at the bottom of the sensing base.

[0012] Preferably, the cleaning protection component includes a protective cover and a pushing component, and both the protective cover and the pushing component are provided in two sets. The pushing component is used to move the protective cover inside and outside the Z-axis arm. The protective cover can be assembled into a cone shape within the Z-axis arm using a pushing component, and a cleaning pad is installed inside the bottom of the protective cover. After one of the protective covers is removed, it can be locked onto the rotating base. The other protective cover is combined with the first protective cover using a pushing component to form a cone and cover the measuring head. The test cleaning pad contacts the ruby ​​measuring ball.

[0013] Preferably, the protective cover is a hollow conical cover with an opening angle of 180 degrees, with its tip pointing downwards and a pipe installed at the tip. When the two protective covers are combined, the pipes are combined into a tubular structure.

[0014] Preferably, the pushing component includes a second YZ-axis track and a second rotating base. The second YZ-axis track is fixedly installed in the inner wall of the Z-axis arm. The output end of one of the second YZ-axis tracks is fixed to the second rotating base, and a chuck is fixedly installed at the output end of the other second YZ-axis track. The second rotating base is servo-rotatedly connected to the chuck. The upper end of the protective cover can be inserted into the rotating base and rotated by a servo control.

[0015] Preferably, the cleaning and protection component further includes a pressurized sprayer, which is installed on the inner top wall of the Z-axis arm, and is used to spray cleaning liquid and high-pressure airflow into the closed cone after the two protective covers are closed in the Z-axis arm.

[0016] Preferably, the outer side of the probe mounting platform is provided with an annular groove, and a rotatable toothed rubber ring is installed in the annular groove. The upper end of the protective cover is a flange. When the protective cover covers the measuring head, its flange position is engaged in the annular groove and forms a seal with the toothed rubber ring.

[0017] Preferably, the dust and chip removal assembly includes a negative pressure tank, a receiving pipe, a YZ axis track, and a flexible hose. The negative pressure tank is fixedly installed in the Z-axis arm, and the flexible hose connects the receiving pipe and the negative pressure tank. The YZ axis track is installed in the Z-axis arm, and its output end is connected to the receiving pipe, which is used to fit the receiving pipe inside the Z-axis arm onto the bottom of the cone after the protective cover is closed. The YZ axis track three can also be used to move the receiving tube out of the Z axis arm and fit it onto the bottom of the cone after the protective cover is closed.

[0018] Preferably, the inner hole of the receiving tube has a conical structure, which is matched with the protective cover.

[0019] Preferably, the Z-axis arm has an opening on the side facing the measuring head, and an accordion-style closure is installed at the opening position to achieve closing and opening of the opening.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The dustproof protection structure of this coordinate measuring machine allows for the sealing of the measuring head after a period of use using a protective cover. Cleaning liquid (alcohol, etc.) and high-pressure airflow are sprayed through nozzles to periodically clean the ruby ​​measuring ball and measuring rod. The waste liquid and waste gas generated during cleaning are collected by a negative pressure tank, which does not affect the measurement environment and reduces the frequency of manual cleaning. In addition, frequent cleaning of the ruby ​​measuring ball significantly improves the measurement accuracy and reduces the probability of damage, incomplete cleaning, and errors caused by manual cleaning.

[0021] 2. The dustproof protection structure of this coordinate measuring machine allows two protective covers to be secured outside the measuring head after the machine is turned off or stopped, keeping the measuring head in a closed and clean environment. Even when not in use for a period of time, the measuring head remains clean and is not easily affected by the environment, which is of great significance for maintaining measurement accuracy.

[0022] 3. The dustproof protection structure of this coordinate measuring machine is much better than manual cleaning, which is difficult to master, easily compromises accuracy, and is susceptible to interference with the testing environment. After cleaning the measuring head, the protective cover retracts into the Z-axis arm for self-cleaning. The self-cleaning process takes place in the internal environment and does not affect the external testing environment. The machine's environment is not affected by the cleaning process. Compared to manually carrying cleaning equipment, this cleaning method is safer and more efficient. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the Z-axis arm and self-cleaning measuring head component of the present invention; Figure 3 This is a cross-sectional view of the Z-axis arm and self-cleaning measuring head component of the present invention. Figure 1 ; Figure 4 This is a cross-sectional view of the Z-axis arm and self-cleaning measuring head component of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the structure of the self-cleaning measuring head component and protective cover of the present invention; Figure 6 This is a schematic diagram of the internal structure of the Z-axis arm of the present invention; Figure 7 This is a schematic diagram of the structure of the Z-axis arm and the cleaning and protection component of the present invention. Figure 1 ; Figure 8 This is a schematic diagram of the structure of the Z-axis arm and the cleaning and protection component of the present invention. Figure 2 ; Figure 9 This is a schematic diagram of the Z-axis arm and dust and chip removal assembly of the present invention.

[0024] In the diagram: 1. X-axis arm; 2. Z-axis arm; 3. Measuring head base; 4. Self-cleaning measuring head assembly; 401. Measuring head; 402. Sensing base; 403. Measuring head mounting platform; 404. Spray nozzle; 405. Rotating base one; 406. Annular groove; 407. Toothed rubber ring; 5. YZ-axis track one; 6. Cleaning and protection components; 601. Protective cover; 602. Pushing component; 6021. YZ-axis track two; 6022. Rotating base two; 6023. Chuck; 603. Cleaning pad; 604. Pipeline; 605. Pressurized sprayer; 7. Dust and chip removal assembly; 701. Negative pressure tank; 702. Receiving pipe; 703. YZ-axis track three; 704. Flexible hose; 8. Opening; 9. Bellows-style closure. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0027] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0029] like Figure 1-9 As shown, a dustproof protection structure for a coordinate measuring machine includes an X-axis arm 1, a Z-axis arm 2, and a measuring head base 3. The Z-axis arm 2 is mounted on the X-axis arm 1 to enable movement along the X and Z axes. The measuring head base 3 is mounted on the bottom end of the Z-axis arm 2. A self-cleaning measuring head component 4 is also included. The self-cleaning measuring head component 4 includes a measuring head 401 and is capable of automatically cleaning the measuring head 401. The self-cleaning measuring head component 4 is separate from the measuring head base 3. A servo YZ axis rail 5 is mounted on the outside of the Z-axis arm 2. The self-cleaning measuring head component 4 is mounted on the servo YZ axis rail 5 to enable movement of the self-cleaning measuring head component 4 to the measuring head base 3 for engagement and to one side of the Z-axis arm 2. The interior of the Z-axis arm 2 is a hollow structure, which contains a cleaning and protection component 6 and a dust removal and chip removal component 7. The cleaning and protection component 6 is used to extend out of the Z-axis arm 2 and wrap around and protect the measuring head 401 when the self-cleaning measuring head component 4 moves to one side of the Z-axis arm 2. When it is inside the Z-axis arm 2, it can work with the dust removal and chip removal component 7 to achieve self-cleaning.

[0030] X-axis arm 1 can achieve precise movement along the X-axis. In addition, the coordinate measuring machine also includes a frame structure not shown in the figure, which is usually made of high-quality granite (good stability and low coefficient of thermal expansion) or aluminum alloy (lightweight) to form a stable reference platform, a Y-axis system for determining the measurement depth, high-precision air bearings (mainstream) or mechanical bearings (in conjunction with servo motors and transmission systems to achieve smooth and frictionless movement), a position feedback system (the core of which is a grating ruler, installed on each axis, used to read the displacement data of each axis in real time and accurately, which is the source of precision), and auxiliary and peripheral equipment.

[0031] The measuring head 401 includes a measuring rod and a measuring stylus for connecting the measuring head, with a ruby ​​measuring ball at its end directly contacting the workpiece.

[0032] The self-cleaning measuring head component 4 and the measuring head base 3 are connected by a cable. After the two are combined, the operator connects the cable. Before separation, the cable needs to be manually disconnected. Alternatively, the mainstream contact-type signal transmission component can be used to avoid manually connecting the signal cable.

[0033] Other components related to signal transmission and electrical connections are also installed in Z-axis arm 2.

[0034] YZ axis track 5 can be driven linearly using a servo motor for driving in the Y and Z axes. It has a lead screw and ball slider installed inside, and the track part of YZ axis track 5 is installed outside the Z axis arm 2.

[0035] In an optional embodiment, the self-cleaning measuring head component 4 further includes a sensing base 402 and a probe mounting platform 403. The probe mounting platform 403 is mounted on the bottom of the sensing base 402. When combined with the measuring head base 3, the sensing base 402 can be used for coordinate measuring machine (CMM) measurement. The measuring head 401 is mounted on the probe mounting platform 403. The sensing base 402 has two symmetrically distributed nozzles 404. The nozzles 404 are mounted in the sensing base 402 using servo bases, with their lower ends extending beyond the sensing base 402. The nozzles 404 can swing relative to the sensing base 402 using the servo bases to adjust the alignment of the ruby ​​probe ball with the measuring head 401, and are used to spray cleaning fluid and high-pressure airflow onto the ruby ​​probe ball. A rotating base 405 is also included, which is fixedly mounted on the bottom of the sensing base 402.

[0036] In this embodiment, the probe mounting stage 403 allows the measuring head 401 to rotate in both directions A and B, enabling the measurement of complex angular features without moving the workpiece. The sensing base 402 is used to connect complex wiring and internally houses precision three-dimensional mechanisms such as springs, leaf springs, strain gauges, and electronic contacts. When the ruby ​​probe ball of the measuring head 401 contacts the workpiece in any direction and undergoes a slight deflection, typically a few micrometers, an electrical signal is triggered.

[0037] The nozzle 404 connects the pneumatic component and the cleaning fluid pumping component in the Z-axis arm 2. The cleaning fluid is usually alcohol. The two nozzles 404 operate independently. The servo base used has a servo motor installed inside to adjust the angle of the nozzle 404. The end of the nozzle 404 is set as a pressure nozzle, which is mainly used to pressurize the gas and liquid.

[0038] In an optional embodiment, the cleaning protection component 6 includes a protective cover 601 and a pushing component 602. Both the protective cover 601 and the pushing component 602 are provided in two sets. The pushing component 602 is used to move the protective cover 601 inside and outside the Z-axis arm 2. The protective cover 601 can be assembled into a cone shape within the Z-axis arm 2 using the pushing component 602. A cleaning pad 603 is installed inside the bottom end of the protective cover 601. After one of the protective covers 601 is removed, it can be locked onto the rotating base 405. The other protective cover 601, using the pushing component 602, is combined with the first protective cover 601 to form a cone shape and covers the measuring head 401, testing the contact of the cleaning pad 603 with the ruby ​​measuring ball.

[0039] In this embodiment, the protective cover 601 is made of plastic, but aluminum alloy can also be used. It needs to ensure a certain structural strength. The sides of the protective cover 601 are provided with ultra-thin rubber pads with grooves. The ultra-thin rubber pads are set with an interlaced structure so that when the two protective covers 601 are closed, the ultra-thin rubber pads contact to achieve a seal. The cleaning pad 603 is preferably made of corrosion-resistant sponge, which has deep grooves with interlaced warp and weft to increase the friction on the ruby ​​measuring ball.

[0040] The cleaning pad 603 is installed inside the protective cover 601 using plastic clips, which allow the height of the cleaning pad 603 to be adjusted within the protective cover 601.

[0041] In an optional embodiment, the protective cover 601 is a hollow conical cover with an opening angle of 180 degrees, with its tip pointing downwards. The tip is equipped with a pipe 604, and when the two protective covers 601 are combined, the pipes 604 are combined into a tubular structure.

[0042] In this embodiment, the pipe 604 is integrally molded and connected to the protective cover 601. It has the same structure as the protective cover 601. The cross-section of the pipe 604 is provided with matching rubber grooves to increase the sealing when joined.

[0043] In an optional embodiment, the pushing component 602 includes a second YZ-axis track 6021 and a second rotating base 6022. The second YZ-axis track 6021 is fixedly installed in the inner wall of the Z-axis arm 2. The output end of one of the second YZ-axis tracks 6021 is fixed to the second rotating base 6022, and the output end of the other YZ-axis track 6021 is fixedly mounted with a chuck 6023. The second rotating base 6022 and the chuck 6023 are servo-rotatedly connected. The upper end of the protective cover 601 can be inserted into the second rotating base 6022 and rotated by servo control.

[0044] In this embodiment, the YZ-axis track 6021 has the same structure as the YZ-axis track 5, but different dimensions. The YZ-axis track 6021 is mainly installed in the Z-axis arm 2 and needs to match the internal dimensions of the Z-axis arm 2. The track of the YZ-axis track 6021 is bolted to the Z-axis arm 2. The rotating base 6022 has the same structure as the rotating base 405, but the rotating base 405 has a fixed platform for fixing to the bottom of the sensing base 402, while the rotating base 6022 is movable. Both the rotating base 6022 and the rotating base 405 have servo motors and gears installed inside. The upper end of the protective cover 601 has a raceway and a toothed groove for cooperating with the rotating base 6022 or the rotating base 405, allowing it to rotate smoothly inside. The gear of the servo motor cooperates with the toothed groove to drive its rotation.

[0045] The upper end of the rotating base 6022 is provided with a slide that cooperates with the chuck 6023. A bearing is installed at the contact position between the chuck 6023 and the chuck 6023. A servo motor and gears are also installed inside the chuck 6023 to drive one of the rotating bases 6022 to rotate.

[0046] In an optional embodiment, the cleaning protection component 6 further includes a pressurized sprayer 605, which is installed on the inner top wall of the Z-axis arm 2, for spraying cleaning liquid and high-pressure airflow into the closed cone after the two protective covers 601 are closed in the Z-axis arm 2.

[0047] In this embodiment, the booster sprayer 605 and the spray pipe 404 use the same supply source and can switch between cleaning liquid or high-pressure gas.

[0048] In an optional embodiment, the outer side of the probe mounting platform 403 is provided with an annular groove 406, and a rotatable toothed rubber ring 407 is installed in the annular groove 406. The upper end of the protective cover 601 is a flange. When the protective cover 601 covers the measuring head 401, its flange position is engaged in the annular groove 406 and forms a seal with the toothed rubber ring 407.

[0049] In this embodiment, the toothed rubber ring 407 is connected to the inner bottom wall of the ring groove 406 by a precision bearing, so that it can rotate together with the toothed rubber ring 407 after the protective cover 601 closes and presses the toothed rubber ring 407.

[0050] In an optional embodiment, the dust and chip removal assembly 7 includes a negative pressure tank 701, a receiving pipe 702, a YZ-axis track 703, and a flexible hose 704. The negative pressure tank 701 is fixedly installed in the Z-axis arm 2, and the flexible hose 704 connects the receiving pipe 702 and the negative pressure tank 701. The YZ-axis track 703 is installed in the Z-axis arm 2, and its output end is connected to the receiving pipe 702, which is used to fit the receiving pipe 702 inside the Z-axis arm 2 and onto the bottom of the cone after the protective cover 601 is closed. The YZ-axis track 703 can also be used to move the receiving pipe 702 out of the Z-axis arm 2 and fit it onto the bottom of the cone after the protective cover 601 is closed.

[0051] In this embodiment, the Z-axis arm 2 is also equipped with components such as a vacuum pump, a liquid storage tank, and a high-pressure air pump. The negative pressure tank 701 works with the vacuum pump to collect gas and liquid. It is not connected to the outside world. The negative pressure tank 701 has a certain capacity. When it is drawn into negative pressure, the cleaned gas and liquid will enter the negative pressure tank 701. A check valve is installed at the point of passage to avoid contamination of the front section.

[0052] The structural principle of YZ axis track 3 703 is the same as that of YZ axis track 2 6021 and YZ axis track 1 5.

[0053] In an optional embodiment, the inner hole of the receiving tube 702 is tapered, and its tapered structure cooperates with the protective cover 601.

[0054] In this embodiment, a sealing gasket is also installed on the inner bottom wall of the receiving tube 702. When it comes into contact with the protective cover 601 under the drive of the YZ axis track 3 703, it can also achieve a certain degree of sealing.

[0055] In an optional embodiment, the Z-axis arm 2 has an opening 8 on the side facing the measuring head 401, and an accordion-style closure 9 is installed at the opening 8 to close or open the opening 8.

[0056] In this embodiment, the accordion-style enclosure 9 has a built-in electric retraction component. The accordion-style enclosure 9 does not need to have strong structural sealing because the individual components inside the Z-axis arm 2 are all sealed. In addition, the test environment has been kept at a high level of cleanliness.

[0057] In use, the self-cleaning measuring head component 4 and the measuring head base 3 are connected via the YZ axis rail 5 to enable the electrical signal of the device. At this time, the measuring head 401 included in the self-cleaning measuring head component 4 can contact the workpiece for measurement under the movement of the three coordinates. After measuring a workpiece or after the measuring head 401 has been used for a period of time, the YZ axis rail 5 can control the self-cleaning measuring head component 4 to disconnect from the measuring head base 3. After the two are separated, the electrical signal is disconnected. At this time, the YZ axis rail 5 can move the self-cleaning measuring head component 4 to one side of the Z-axis arm 2 for cleaning or protection.

[0058] Cleaning: First, one of the YZ axis tracks 6021 is energized to control the rotating base 6022 with chuck 6023, causing it to move out of the Z-axis arm 2 with the protective cover 601 and align it with the probe mounting platform 403. The protective cover 601 is then inserted into the annular groove 406, and the rotating base 6022 is energized. The energization of the rotating base 6022 controls the protective cover 601 to rotate around the measuring head 401 and screw into the rotating base 405 until it is completely inserted into the rotating base 405. At this time, this YZ axis track 6021 rejoins the Z-axis arm 2. The other YZ axis track 6021 continues to be energized to control the rotating base 6022 with the other protective cover 601 to extend out of the Z-axis arm 2 again and be inserted into the annular groove 406 of the probe mounting platform 403, so that it is tightly closed with the first protective cover 601 and forms a conical structure. At this time, the test cleaning pad 603 contacts the ruby ​​probe ball. Finally, YZ axis track 3 703, carrying receiver tube 702, extends from Z axis arm 2 and is fastened to the bottom of the aforementioned conical structure, achieving a closed connection. After assembly and connection, one of the nozzles 404 sprays alcohol onto the measuring head 401. The two protective covers 601 are then driven by the servo motor to rotate along rotating base 2 6022 and rotating base 1 405, causing the test cleaning pad 603 to wipe the ruby ​​measuring ball. After a period of spraying and cleaning, the other nozzle 404 sprays high-pressure airflow onto the measuring head 401 to remove dust and dry it. During the spraying and blowing process, the negative pressure tank 701 connected to receiver tube 702 synchronously recovers the gas and liquid, preventing them from flowing into the test environment.

[0059] After cleaning, the two YZ axis rails 6021 move the protective cover 601 back into the Z axis arm 2 in the reverse order mentioned above. After the two are brought together, the pressurized sprayer 605 is used to perform a secondary cleaning of the inner wall of the protective cover 601 and the ruby ​​measuring ball.

[0060] Protection: Similar to the cleaning sequence, the two YZ axis rails 6021 with protective covers 601 are combined into a cone shape and covered outside the measuring head 401. The bottom of the cone structure is then sealed by the receiving tube 702 to achieve long-term protection of the measuring head 401.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0062] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dustproof protection structure for a coordinate measuring machine, comprising an X-axis arm (1), a Z-axis arm (2), and a measuring head base (3), wherein the Z-axis arm (2) is mounted on the X-axis arm (1) to enable the Z-axis arm (2) to move along the X-axis and Z-axis, and the measuring head base (3) is mounted on the bottom end of the Z-axis arm (2), characterized in that: It also includes a self-cleaning measuring head component (4); The self-cleaning measuring head component (4) includes a measuring head (401), and the self-cleaning measuring head component (4) is capable of automatically cleaning the measuring head (401). The self-cleaning measuring head component (4) and the measuring head base (3) are separate. A servo YZ axis rail (5) is installed outside the Z-axis arm (2). The self-cleaning measuring head component (4) is installed on the servo YZ axis rail (5) to realize the self-cleaning measuring head component (4) moving to the measuring head base (3) and moving to one side of the Z-axis arm (2). The interior of the Z-axis arm (2) is a hollow structure, which contains a cleaning and protection component (6) and a dust removal and chip removal component (7). The cleaning and protection component (6) is used to extend out of the Z-axis arm (2) and wrap around and protect the measuring head (401) when the self-cleaning measuring head component (4) moves to one side of the Z-axis arm (2). When it is inside the Z-axis arm (2), it can cooperate with the dust removal and chip removal component (7) to achieve self-cleaning.

2. The dustproof protection structure of the coordinate measuring machine according to claim 1, characterized in that: The self-cleaning measuring head component (4) also includes a sensing base (402) and a measuring head mounting platform (403). The measuring head mounting platform (403) is installed at the bottom of the sensing base (402). When the sensing base (402) and the measuring head base (3) are combined, they can be used for coordinate measuring. The measuring head (401) is mounted on the measuring head mounting platform (403). The sensing base (402) is provided with two sets of symmetrically distributed nozzles (404). The nozzles (404) are mounted in the sensing base (402) using a servo base, with their lower ends extending out of the sensing base (402). The nozzles (404) can swing relative to the sensing base (402) using the servo base to adjust the ruby ​​measuring ball aligned with the measuring head (401) and spray cleaning liquid and high-pressure airflow onto the ruby ​​measuring ball. It also includes a rotating base (405), which is fixedly installed at the bottom of the sensing base (402).

3. The dustproof protection structure of the coordinate measuring machine according to claim 2, characterized in that: The cleaning protection component (6) includes a protective cover (601) and a pushing component (602). Both the protective cover (601) and the pushing component (602) are provided in two sets. The pushing component (602) is used to move the protective cover (601) inside and outside the Z-axis arm (2). The protective cover (601) can be assembled into a cone within the Z-axis arm (2) using the pushing component (602), and a cleaning pad (603) is installed inside the bottom end of the protective cover (601). After one of the protective covers (601) is removed, it can be locked onto the rotating base (405). The other protective cover (601) is combined with the first protective cover (601) to form a cone and covers the measuring head (401) with the pusher (602) and (603) contacts the ruby ​​measuring ball.

4. The dustproof protection structure of the coordinate measuring machine according to claim 3, characterized in that: The protective cover (601) is a hollow conical cover with an opening angle of 180 degrees, with its tip pointing downwards. The tip is equipped with a pipe (604). When the two protective covers (601) are combined, the pipes (604) are combined into a tubular structure.

5. The dustproof protection structure of the coordinate measuring machine according to claim 4, characterized in that: The pushing component (602) includes a second YZ axis track (6021) and a second rotating base (6022). The second YZ axis track (6021) is fixedly installed in the inner wall of the Z-axis arm (2). The output end of one of the second YZ axis tracks (6021) is fixed to the second rotating base (6022), and the output end of the other second YZ axis track (6021) is fixedly installed with a chuck (6023). The second rotating base (6022) and the chuck (6023) are servo-rotated. The upper end of the protective cover (601) can be inserted into the rotating base (6022) and rotated by servo control.

6. The dustproof protection structure of the coordinate measuring machine according to claim 5, characterized in that: The cleaning protection component (6) also includes a booster sprayer (605), which is installed on the inner top wall of the Z-axis arm (2) to spray cleaning liquid and high-pressure airflow into the closed cone after the two protective covers (601) are closed in the Z-axis arm (2).

7. The dustproof protection structure of the coordinate measuring machine according to claim 6, characterized in that: The outer side of the probe mounting platform (403) is provided with an annular groove (406), and a rotatable toothed rubber ring (407) is installed in the annular groove (406). The upper end of the protective cover (601) is a flange. When the protective cover (601) covers the measuring head (401), its flange position is inserted into the annular groove (406) and forms a seal with the toothed rubber ring (407).

8. The dustproof protection structure of the coordinate measuring machine according to claim 7, characterized in that: The dust removal and chip removal assembly (7) includes a negative pressure tank (701), a receiving pipe (702), a YZ axis track three (703), and a hose (704). The negative pressure tank (701) is fixedly installed in the Z-axis arm (2), and the hose (704) connects the receiving pipe (702) and the negative pressure tank (701). The YZ axis track three (703) is installed in the Z-axis arm (2), and its output end is connected to the receiving pipe (702) to fit the receiving pipe (702) inside the Z-axis arm (2) and then onto the bottom of the cone after the protective cover (601) is closed. The YZ axis track three (703) can also be used to move the receiving tube (702) out of the Z axis arm (2) and put it on the bottom of the cone after the protective cover (601) is closed.

9. The dustproof protection structure of the coordinate measuring machine according to claim 8, characterized in that: The inner hole of the receiving tube (702) is tapered, and its tapered structure is matched with the protective cover (601).

10. The dustproof protection structure of the coordinate measuring machine according to claim 9, characterized in that: The Z-axis arm (2) has an opening (8) on the side facing the measuring head (401), and a bellows-style closure (9) is installed at the opening (8) to close and open the opening (8).

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