A cylinder groove verticality measuring device

Abstract

This utility model relates to the field of measurement technology and solves the problem in air conditioner compressor assembly where the cylinder slot verticality is not fully measured, leading to excessive verticality, blade jamming, and compressor failure. Specifically, it discloses a cylinder slot verticality measuring device, including a positioning platform with a positioning guide post at its center and a positioning slot at its center. An installation plug is connected to the bottom of the positioning guide post, which has a first positioning hole, and the positioning platform has a second positioning hole. Locking elements are installed in both the first and second positioning holes. The positioning platform supports the bottom of the workpiece, the positioning guide post guides the placement of the workpiece, and the locking elements fix the relative position of the positioning platform and the positioning guide post. This utility model is an optional equipment for measuring compressor cylinders, allowing for accurate cylinder positioning before measuring cylinder slot verticality, resulting in more accurate measurement results.

Description

Technical Field

[0001] This utility model relates to the field of measurement technology, and in particular to a cylinder groove verticality measuring device. Background Technology

[0002] In rotary compressor manufacturing, cylinders, pistons, and vanes are the core moving parts. The clearances, or step differences, between them directly affect the compressor's sealing performance, energy efficiency, and service life. In traditional production methods, these parts are often selected and matched in groups after manual measurement. This is not only inefficient and time-consuming per unit, but also susceptible to subjective errors, making it difficult to guarantee consistent fitting accuracy in mass production and failing to meet the demands for high-performance and miniaturized compressors. Therefore, automated measurement and matching machines based on automated detection, data matching, and precision mechanical transmission technologies have emerged as key equipment for solving the problem of precise component fitting in large-scale production.

[0003] The working process and principle of this matching machine are as follows: First, the cylinders, pistons, and blades to be matched are transported to their respective precision testing stations by the feeding mechanism. Using laser displacement sensors or high-precision image measurement systems, the key dimensions of each component are automatically collected and converted into digital signals. These key dimensions include the cylinder inner diameter, piston outer diameter, and blade thickness. Next, the control system analyzes the dimensional data of each component according to a preset step matching algorithm, such as "minimum clearance priority" or "group corresponding matching" algorithm, and quickly selects the cylinder, piston, and blade combinations that meet the fitting accuracy requirements. Finally, the robotic arm or transfer mechanism picks up the corresponding components according to the matching results and places them in the same assembly station or material box to complete the automatic matching.

[0004] The core components of this equipment typically fall into four categories: First, the detection unit, which includes a laser sensor, an image measuring camera, and a dimensional calibration module, is primarily responsible for accurately acquiring component dimensional data; second, the conveying and positioning unit, consisting of a servo motor-driven conveyor belt and pneumatic positioning fixtures, enables the orderly conveying of components and stable fixation during detection; third, the execution unit, equipped with a multi-axis robotic arm, gripping suction cups, or chucks, completes the gripping and grouping of components after matching; and fourth, the control and data processing unit, integrating a PLC, industrial computer, and human-machine interface, coordinates equipment operation, data processing, and matching logic execution, while storing optional data for subsequent traceability.

[0005] Currently, at the cylinder inspection station of this optional machine, the verticality of all cylinder slots is not measured during assembly. This results in occasional instances where the verticality of the cylinder slots is too high, causing blade jamming, preventing the compressor from starting, and rendering it unusable. Therefore, there is an urgent need to add a cylinder slot verticality measurement station to the three-part automatic sorting and measuring machine to measure the verticality of all cylinder slots. Utility Model Content

[0006] To address the problem in existing technologies where cylinder slot verticality is sometimes excessively high due to the lack of full measurement of cylinder slot verticality during assembly, leading to blade jamming, compressor failure, and eventual scrapping, this invention provides a cylinder slot verticality measuring device.

[0007] The technical solution adopted in this utility model is:

[0008] A cylinder groove verticality measuring device includes a positioning platform, a positioning guide post at the center of the positioning platform, a positioning slot for installing the positioning guide post at the center of the positioning platform, an installation plug that mates with the positioning slot connected to the bottom of the positioning guide post, a first positioning hole on the positioning guide post, a second positioning hole corresponding to the first positioning hole on the positioning platform, and locking elements provided in the first positioning hole and the second positioning hole.

[0009] The positioning platform is used to support the bottom of the workpiece, the positioning guide post is used to guide the placement of the workpiece, and the locking member is used to fix the relative position of the positioning platform and the positioning guide post by passing through the first positioning hole and the second positioning hole.

[0010] Furthermore, a probe assembly is provided on one side of the positioning platform. The probe assembly includes a probe mounting base. Opening slots are respectively opened at corresponding positions on the positioning platform and the positioning guide post. One end of the probe mounting base extends into the opening slot. The opening slot is used to provide installation space for the measuring point of the probe assembly to be set inside the workpiece.

[0011] Furthermore, a probe block is provided on the portion of the probe mounting base that extends into the positioning platform. The probe block has a measuring hole, and a perpendicularity measuring instrument is also connected to the probe mounting base. The measuring hole is connected to the measuring end of the perpendicularity measuring instrument. The probe block is used to be placed in the workpiece to be measured groove.

[0012] Furthermore, the perpendicularity measuring instrument is a pneumatic measuring instrument, and at least two pneumatic measuring instruments are connected to the probe mounting base. The measuring hole and the measuring end of the pneumatic measuring instrument are connected through an air passage provided in the probe mounting base. The pneumatic measuring instrument is used to apply gas to the groove surface of the workpiece to be measured by ejecting gas through the air passage and the measuring hole.

[0013] Furthermore, the bottom of the positioning platform is connected to a platform base plate, and the bottom of the platform base plate is connected to a base mechanism. The base mechanism has multiple base screw holes and multiple base pin holes, and the platform base plate has base plate mounting holes corresponding to the base screw holes and base pin holes.

[0014] Furthermore, the base mechanism includes an upper base plate connected to the platform base plate, the bottom surface of the upper base plate is connected to the top of multiple support columns, the bottom end of the support columns is connected to a lower base plate, and the horizontal cross-sections of the upper base plate and the lower base plate are equal in area and have the same shape as the horizontal cross-section of the platform base plate.

[0015] The beneficial effects of this utility model are:

[0016] This utility model's cylinder groove verticality measuring device solves the problem of inaccurate workpiece positioning through the relevant settings of the positioning structure and stable assembly. During the device's activation phase, the mounting plug at the bottom of the positioning guide post is precisely aligned with the positioning slot at the center of the positioning platform. Then, the locking element is inserted into the first positioning hole of the positioning guide post and the corresponding second positioning hole of the positioning platform, thus firmly fixing their relative positions and preventing positioning deviations due to guide post loosening or displacement during subsequent use. When the robotic gripper transfers the cylinder workpiece to be inspected from the previous station to this device, the positioning guide post provides a guiding effect, guiding the workpiece to be stably placed along the guide post's reference axis. Simultaneously, the positioning platform provides stable support to the bottom of the workpiece, constraining its position from both radial and axial directions. This process effectively counteracts the motion disturbance during robotic gripper transfer and the interference of insufficient guide rail setting accuracy on workpiece positioning, ensuring that the workpiece is always in the preset position when measuring groove verticality, thus solving the problem of insufficient workpiece placement accuracy in the device. Ultimately, the device significantly reduced the error in the verticality measurement data of the slot, improved the accuracy and stability of the test data, and provided a reliable guarantee for the automatic measurement and matching machine to match cylinders, pistons and blades based on more accurate dimensional data. This helps to ensure the consistency of the fitting accuracy of the compressor's core components in mass production, thereby supporting the improvement of the compressor's sealing performance, energy efficiency and service life, and meeting its development needs for high performance and miniaturization as well as the testing requirements of large-scale production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the positioning platform of the device of this utility model;

[0019] Figure 3 This is a schematic diagram of the positioning guide post structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the probe assembly structure of this utility model.

[0021] Figure label:

[0022] 1-Positioning platform, 2-Positioning guide post, 3-Positioning slot, 4-Mounting plug, 5-First positioning hole, 6-Second positioning hole, 7-Probe mounting base, 8-Opening slot, 9-Probe block, 10-Measuring hole, 11-Platform base plate, 12-Base plate mounting hole, 13-Measuring instrument connector, 14-Base upper plate, 15-Support column, 16-Base lower plate. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] This embodiment is a cylinder groove verticality measuring device, such as... Figures 1-3 As shown, the device includes a positioning platform 1, a positioning guide post 2 at the center of the positioning platform 1, a positioning slot 3 for installing the positioning guide post 2 at the center of the positioning platform 1, an installation plug 4 that mates with the positioning slot 3 connected to the bottom of the positioning guide post 2, a first positioning hole 5 on the positioning guide post 2, a second positioning hole 6 corresponding to the first positioning hole 5 on the positioning platform 1, and locking elements provided in the first positioning hole 5 and the second positioning hole 6.

[0026] The positioning platform 1 is used to support the bottom of the workpiece, the positioning guide post 2 is used to guide the placement of the workpiece, and the locking member is used to fix the relative position of the positioning platform 1 and the positioning guide post 2 by passing through the first positioning hole 5 and the second positioning hole 6.

[0027] Before the cylinder groove verticality measuring device of this embodiment operates, the positioning guide post 2 and the positioning platform 1 are assembled. The mounting plug 4 at the bottom of the positioning guide post 2 is aligned with the positioning slot 3 at the center of the positioning platform 1 and inserted, so that the positioning guide post 2 is initially fixed on the positioning platform 1. Then, the locking member is passed through the first positioning hole 5 on the positioning guide post 2 and the corresponding second positioning hole 6 on the positioning platform 1. Through the fastening action of the locking member, the relative position between the positioning guide post 2 and the positioning platform 1 is completely fixed and will not shift due to vibration or external force during subsequent operation. When the mechanical gripper transfers the cylinder workpiece to be inspected from the previous station to this device, the positioning guide post 2 will form a sleeve guide for the workpiece, guiding the workpiece to fall smoothly along the reference axis of the positioning guide post 2. At the same time, the positioning platform 1 provides support for the bottom of the workpiece, constraining the position of the workpiece in both radial and axial directions. The working principle of this process is to use structural positioning settings, with the positioning guide post 2 guiding and limiting the radial displacement of the workpiece, and the positioning platform 1 supporting and stabilizing the axial position of the workpiece. Then, locking components ensure the fixation of the positioning guide post 2 and the positioning platform 1, thereby offsetting the motion disturbance during the transfer of the mechanical gripper and the influence of insufficient guide rail setting accuracy on workpiece positioning. This invention solves the problem of insufficient workpiece placement accuracy, ensuring that the workpiece is always in a preset, precise position when measuring the verticality of the cylinder groove. This significantly reduces the error in the groove verticality measurement data, improves the accuracy and stability of the measurement data, and provides a reliable guarantee for the subsequent matching of cylinders, pistons, and blades based on precise dimensional data by the automatic measurement and matching machine. This helps ensure the consistency of the fitting accuracy of the compressor's core components in mass production, thereby supporting the improvement of the compressor's sealing performance, energy efficiency, and service life.

[0028] Example 2

[0029] This embodiment is based on the foregoing embodiment. In this embodiment, as follows: Figure 1 , Figure 2 , Figure 4 As shown, a probe assembly is provided on one side of the positioning platform 1. The probe assembly includes a probe mounting base 7. Opening slots 8 are respectively opened at corresponding positions on the positioning platform 1 and the positioning guide post 2. One end of the probe mounting base 7 extends into the opening slot 8. The opening slot 8 is used to provide installation space for the measuring point of the probe assembly to be set inside the workpiece.

[0030] In a preferred embodiment, a probe block 9 is provided on the part of the probe mounting base 7 that extends into the positioning platform 1. The probe block 9 has a measuring hole 10. A perpendicularity measuring instrument is also connected to the probe mounting base 7. The measuring hole 10 is connected to the measuring end of the perpendicularity measuring instrument. The probe block 9 is used to be placed in the workpiece to be measured groove.

[0031] This embodiment adds a probe assembly to improve the measurement function. During assembly, one end of the probe mounting base 7 of the probe assembly is inserted into the opening slot 8 corresponding to the position of the positioning platform 1 and the positioning guide post 2, so that the probe mounting base 7 and the positioning structure maintain a relatively stable position, while ensuring that the probe block 9 on the probe mounting base 7 can correspond to the position of the workpiece to be measured. When the device is working, the mechanical gripper transfers the cylinder workpiece to the positioning platform 1 and completes the positioning through the positioning guide post 2. The probe block 9 will extend into the workpiece to be measured along with the setting of the probe mounting base 7. Since the probe block 9 has a measuring hole 10, and the measuring end of the perpendicularity measuring instrument connected to the probe mounting base 7 is connected to the measuring hole 10, the perpendicularity measuring instrument can directly act on the surface of the workpiece to be measured through the measuring hole 10 to perform perpendicularity detection. Its working principle is to utilize the opening slot 8 to provide installation space for the probe assembly to extend into the workpiece, solving the problem of the probe being unable to reach the groove to be measured inside the workpiece. Simultaneously, the setting of the probe block 9 ensures that the measuring hole 10 corresponds to the groove to be measured, allowing the measuring end of the perpendicularity measuring instrument to accurately align with the area to be measured. This embodiment of the device eliminates the need for secondary adjustment and re-measurement of the already positioned workpiece after it has been positioned, avoiding disruption of the workpiece's positioning state due to secondary adjustments. This improves the convenience of the inspection operation and further ensures the accuracy of the measurement, enabling cylinder groove perpendicularity detection to be directly performed on the area to be measured. This effectively improves inspection efficiency and the reliability of the inspection data, perfects the function of the measuring device, and meets the requirements of automatic measurement and matching machines for accurate cylinder groove perpendicularity detection. Figure 1 As shown, the probe mounting base 7 is equipped with two measuring instrument connectors 13. These measuring instrument connectors 13 are used to connect the air supply pipe of an external pneumatic measuring instrument to realize the connection between the pneumatic measuring instrument and the probe assembly and to perform pneumatic measurement. The specific model of the pneumatic measuring instrument can be selected from: ifm SDP110 air gap sensor and Festo SOPA-CM4H-R1-WQ6-2N-M12 pneumatic sensor.

[0032] Example 3

[0033] This embodiment is based on the aforementioned embodiment. In this embodiment, the verticality measuring instrument is a pneumatic measuring instrument. At least two pneumatic measuring instruments are connected to the probe mounting base 7. The measuring hole 10 and the measuring end of the pneumatic measuring instrument are connected through the air passage provided in the probe mounting base 7. The pneumatic measuring instrument is used to spray gas through the air passage and the measuring hole 10 to act on the groove surface of the workpiece to be measured.

[0034] In this embodiment, after the workpiece is positioned by the positioning guide post 2 and the positioning platform 1, and the probe block 9 extends into the workpiece's test groove, the pneumatic measuring instrument starts and outputs gas. The gas is transmitted through the air passage to the measuring hole 10 and ejected, acting on the surface of the workpiece's test groove. The pneumatic measuring instrument detects the pressure or flow rate changes generated after the gas acts on the groove surface and converts them into corresponding detection signals, thereby determining the verticality of the cylinder groove. Its working principle utilizes the high-precision characteristics of pneumatic measurement, acquiring measurement data through the interaction between the gas and the surface of the test groove. Simultaneously, multiple pneumatic measuring instruments can achieve synchronous detection at different points, ensuring the comprehensiveness of the detection results. The internal air passage design avoids interference from external factors on gas transmission. The beneficial technical effects are that pneumatic measurement does not require hard contact with the workpiece surface, thus avoiding scratches or wear and protecting the integrity of the workpiece. It also facilitates the handling of workpieces and reduces the impact on the positioning status during handling. The synchronous detection of multiple pneumatic measuring instruments not only improves detection efficiency but also avoids the random errors of single-point detection, further improving measurement accuracy and making the cylinder groove perpendicularity measurement data more reliable. It meets the high-efficiency and accurate detection requirements of automatic measurement and matching machines, while also extending the service life of the workpiece and the measuring device.

[0035] Preferably, the measurement accuracy of the measuring instrument can be set as follows: repeatability requirement no greater than 1μm; accuracy requirement no greater than 0.7μm; stability requirement no greater than 1μm / 2 hours (within ±2℃ of ambient temperature change within 2 hours); the measurement uses a high-precision, large-gap pneumatic sensor for easy handling of parts. The measuring platform can use a THK-customized high-precision guide rail to improve measurement and positioning accuracy. The probe uses a titanium nitride coating, and the positioning platform is welded with a high-density alloy, ensuring a service life of over 2 million cycles.

[0036] Example 4

[0037] This embodiment is based on the foregoing embodiment. In this embodiment, as follows: Figure 1 As shown, the bottom of the positioning platform 1 is connected to a platform base plate 11, and the bottom of the platform base plate 11 is connected to a base mechanism. The base mechanism has multiple base screw holes and multiple base pin holes, and the platform base plate 11 has base plate mounting holes 12 corresponding to the base screw holes and base pin holes. In a preferred embodiment, the base mechanism includes a base upper plate 14 connected to the platform base plate 11. The bottom surface of the base upper plate 14 is connected to the top ends of multiple support columns 15, and the bottom ends of the support columns 15 are connected to a base lower plate 16. The horizontal cross-sections of the base upper plate 14 and the base lower plate 16 are equal in area and have the same shape as the horizontal cross-section of the platform base plate 11.

[0038] In this embodiment, the base mechanism, through the engagement of the base screw holes and pin holes, ensures the installation datum accuracy of the platform base plate 11 and the positioning platform 1, preventing tilting of the positioning platform 1 due to installation deviations. The support column 15 stably bears the weight of the positioning platform 1 and the workpiece, providing stable support for the entire measuring device. Its working principle utilizes the structure of the base mechanism, ensuring installation accuracy through the positioning engagement of the screw holes and pin holes, and enhancing structural strength with the support column 15. The design of the same cross-section makes the force distribution more uniform, thereby avoiding positioning deviations caused by base instability. This embodiment significantly improves the stability of the entire measuring device, effectively preventing the positioning platform 1 from shifting due to base support issues during long-term use, ensuring consistent workpiece positioning. The support column 15 enhances the structural strength of the device, extending its overall service life. Simultaneously, the detachable connection between the platform base plate 11 and the base mechanism facilitates installation, maintenance, and repair, reducing production line maintenance costs. The stable base support also provides a reliable foundation for cylinder groove verticality measurement, further ensuring the stability and accuracy of measurement data, meeting the requirements for long-term stable operation of testing equipment in large-scale production.

[0039] The above-described embodiments merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A cylinder bore perpendicularity measuring device characterized by, The positioning platform is provided with a positioning guide column at the center, a positioning slot for installing the positioning guide column is formed at the center of the positioning platform, an installation plug matched with the positioning slot is connected to the bottom of the positioning guide column, a first positioning hole is formed in the positioning guide column, a second positioning hole corresponding to the first positioning hole is formed in the positioning platform, and a locking member is arranged in the first positioning hole and the second positioning hole. The positioning platform is used for supporting the bottom of the workpiece, the positioning guide column is used for guiding the placement of the workpiece, and the locking member is used for fixing the relative position of the positioning platform and the positioning guide column by penetrating the first positioning hole and the second positioning hole.

2. A cylinder bore straightness measuring device according to claim 1, wherein One side of the positioning platform is provided with a probe assembly, the positioning platform and the corresponding position on the positioning guide column are each provided with an open slot, one end of the probe mounting seat is arranged in the open slot, and the open slot is used for providing installation space for the measurement point of the probe assembly arranged in the workpiece.

3. A cylinder bore straightness measuring device according to claim 2, wherein A probe block is arranged on the part of the probe mounting seat inserted into the positioning platform, a measurement hole is formed in the probe block, a perpendicularity measuring instrument is further connected to the probe mounting seat, the measurement hole is in communication with the measurement end of the perpendicularity measuring instrument, and the probe block is arranged in the to-be-measured groove of the workpiece.

4. A cylinder bore straightness measuring device according to claim 3, wherein The perpendicularity measuring instrument is a pneumatic measuring instrument, at least two pneumatic measuring instruments are connected to the probe mounting seat, the measurement hole and the measurement end of the pneumatic measuring instrument are in communication through an air channel arranged in the probe mounting seat, and the pneumatic measuring instrument is used for acting on the groove surface of the to-be-measured workpiece through the ejected gas, the air channel and the measurement hole.

5. The cylinder bore perpendicularity measuring device of claim 1, wherein The bottom of the positioning platform is connected with a platform bottom plate, the bottom of the platform bottom plate is connected with a base mechanism, a plurality of base screw holes and a plurality of base pin holes are formed in the base mechanism, and a plurality of bottom plate mounting holes corresponding to the base screw holes and the base pin holes are formed in the platform bottom plate.

6. A cylinder bore straightness measuring device according to claim 5, wherein The base mechanism comprises a base upper plate connected with the platform bottom plate, the top end of a plurality of support columns is connected to the bottom surface of the base upper plate, the bottom end of the support column is connected with a base lower plate, and the horizontal cross section of the base upper plate and the base lower plate is equal to and the same as the horizontal cross section area of the platform bottom plate.

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