A pneumatic concentricity gauge

Abstract

This utility model relates to the field of mechanical testing equipment technology, and discloses a pneumatic concentric measuring instrument, including a base plate. A fixing component is provided on the upper surface of the base plate. The fixing component includes a cylinder, which is fixedly connected to the upper surface of the base plate. A pressure block is fixedly connected to the output end of the cylinder. A bearing is rotatably connected to the inner wall of the pressure block. A connecting column is fixedly connected to the outer wall of the bearing. A spring is sleeved on the outer wall of the connecting column. One end of the spring is fixedly connected to the lower surface of the pressure block, and the other end is fixedly connected to the upper surface of the connecting column. A product base is fixedly connected to the upper surface of the base plate, and a product body is sleeved on the outer wall of the product base. The product body is in contact with the connecting column. In this utility model, the pressure block is driven by a cylinder to fix the product body, achieving stable clamping of the tested product during the testing process and avoiding positioning deviations that may occur with manual clamping.

Description

Technical Field

[0001] This utility model relates to the field of mechanical testing equipment technology, and in particular to a pneumatic concentric measuring instrument. Background Technology

[0002] In mechanical manufacturing and assembly processes, the concentricity of components directly affects assembly accuracy and operational stability, especially for gears, bearings, and precision shaft parts. Traditional concentricity testing relies heavily on mechanical fixtures or manual measurement methods, which are not only cumbersome and inefficient but also prone to damaging high-precision parts during measurement. Furthermore, for critical components such as tooth surfaces and outer diameters, existing testing devices struggle to simultaneously meet the requirements of positioning, rotation, and real-time measurement, leading to some instability in the test data.

[0003] Existing concentricity testing devices typically include a measuring support, a rotating platform, and contact sensors. The measuring support supports the part, the rotating platform allows the workpiece to rotate around its axis, and the sensors are responsible for collecting the radial deviation or tooth surface error of the part, outputting the test results through readings or an electronic acquisition system. These devices achieve basic positioning and rotation measurement functions through mechanical structures, meeting the concentricity testing needs of some parts, but the overall structure leans towards a traditional rigid design.

[0004] In practical applications, existing concentricity testing devices are relatively complex to operate and provide insufficient protection for the workpiece during measurement. This poses a particular risk of slight damage to high-precision parts. Furthermore, measurement accuracy is affected by manual operation and clamping methods, making it difficult to achieve stable and consistent data output. Therefore, a pneumatic concentricity measuring instrument is needed that simplifies the operation process, improves measurement accuracy, and effectively protects the workpiece during testing, thereby enhancing testing efficiency and reliability. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a pneumatic concentric measuring instrument, which aims to improve the problems of complex detection operation, low detection accuracy and easy product damage in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pneumatic concentric measuring instrument, comprising a base plate, wherein a fixing component is provided on the upper surface of the base plate; The fixing assembly includes a cylinder fixedly connected to the upper surface of the base plate, a pressure block fixedly connected to the output end of the cylinder, a bearing rotatably connected to the inner wall of the pressure block, a connecting column fixedly connected to the outer wall of the bearing, a spring sleeved on the outer wall of the connecting column, one end of the spring fixedly connected to the lower surface of the pressure block, and the other end of the spring fixedly connected to the upper surface of the connecting column, a product base fixedly connected to the upper surface of the base plate, a product body sleeved on the outer wall of the product base, the product body fitting against the connecting column, a movable gauge block for contacting the outer peripheral surface of the product body, a push rod connected to the movable gauge block, and a dial indicator with its measuring end in contact with the push rod.

[0007] Furthermore, a guide rail is fixedly connected to the upper surface of the base plate, and a slider is slidably connected to the outer wall of the guide rail.

[0008] Furthermore, a movable gauge block is fixedly connected to the upper surface of the slider, and the outer wall of the movable gauge block is in contact with the product body.

[0009] Furthermore, a connecting block is fixedly connected to the upper surface of the base plate.

[0010] Furthermore, a push rod is slidably connected to the inner wall of the connecting block, and a spring is sleeved on the outer wall of the push rod.

[0011] Furthermore, one end of the second spring is fixedly connected to the outer wall of the movable block, and the other end of the second spring is fixedly connected to the outer wall of the connecting block.

[0012] Furthermore, the outer wall of the push rod is threadedly connected to the inner wall of the movable gauge block, and a connecting block two is fixedly connected to the upper surface of the base plate.

[0013] Furthermore, the inner wall of the second connecting block is slidably connected to one end of the dial indicator, and the one end of the dial indicator is in contact with the push rod.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the product body is fixed by a cylinder-driven pressure block, which realizes stable clamping of the product under test during the testing process and avoids positioning deviations that may be caused by manual clamping; the spring provides flexible buffer for the clamping structure, protecting the product from damage during clamping and rotation; the bearing cooperates with the product rotation, making the operation smooth and even, and ensuring that the product is subjected to uniform force during rotation measurement. This design can effectively improve the accuracy and repeatability of concentricity detection, while being easy to operate and reducing human error. 2. In this utility model, the product is positioned quickly and accurately by means of a guide rail, a slider, and a movable gauge block. The outer diameter and tooth surface diameter are detected in real time by means of a push rod, a spring, and a dial indicator, ensuring a smooth and stable measurement process, avoiding damage to the instrument during the test, and improving the reliability of the test. The overall structure achieves high-precision, reliable, and safe concentricity measurement through the organic combination of pneumatic control and mechanical buffering, making it suitable for production line and batch testing. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a pneumatic concentric measuring instrument proposed in this utility model; Figure 2 This is a schematic diagram of the movable gauge block of a pneumatic concentric measuring instrument proposed in this utility model. Figure 3 This is a schematic diagram of the cylinder structure of a pneumatic concentric measuring instrument proposed in this utility model; Figure 4 This is a schematic diagram of the main body structure of a pneumatic concentric measuring instrument proposed in this utility model. Figure 5 This is a schematic diagram of the pressure block structure of a pneumatic concentric measuring instrument proposed in this utility model.

[0016] Legend: 1. Base plate; 2. Guide rail; 3. Product base; 4. Product body; 5. Connecting column; 6. Spring 1; 7. Pressure block; 8. Cylinder; 9. Spring 2; 10. Connecting block 1; 11. Push rod; 12. Dial indicator; 13. Connecting block 2; 14. Slider; 15. Movable gauge block; 16. Bearing. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figure 1 - Figure 5 The present invention provides an embodiment of a pneumatic concentric measuring instrument, including a base plate 1. The base plate 1 serves as the supporting foundation for the entire pneumatic concentric measuring instrument, ensuring the overall stability and accuracy of the device during the measurement process. A fixing component is provided on the upper surface of the base plate 1. The fixing component includes a cylinder 8, which drives the pressure block 7 to move up and down, achieving stable clamping of the product body 4, replacing manual clamping, eliminating human positioning errors, and improving operational convenience and measurement reliability. The cylinder 8 is fixedly connected to the upper surface of the base plate 1, and the pressure block 7 is fixedly connected to the output end of the cylinder 8. A bearing 16 is rotatably connected to the inner wall of the pressure block 7, and a connecting column 5 is fixedly connected to the outer wall of the bearing 16. A spring 6 is sleeved on the outer wall of the connecting column 5, providing flexible support and buffering to absorb the pressure applied by the pressure block 7 and the rotation process. To prevent damage to the product body 4 from minor vibrations and ensure stable and reliable measurement, one end of spring 6 is fixedly connected to the lower surface of pressure block 7, and the other end of spring 6 is fixedly connected to the upper surface of connecting column 5. The product base 3 is fixedly connected to the upper surface of base plate 1, and the product base 3 supports and fixes the product body 4. The product body 4 is in contact with the connecting column 5. Movable gauge block 15 is used to contact the outer peripheral surface of product body 4. Push rod 11 is connected to movable gauge block 15, and dial indicator 12, the measuring end of which contacts push rod 11.

[0019] Specifically, after the product body 4 is placed on the product base 3, the cylinder 8 drives the pressure block 7 to move downwards, achieving automatic clamping of the product. The bearing 16 installed inside the pressure block 7 ensures flexibility during rotation and avoids resistance caused by friction. The cooperation between the connecting column 5 and the spring 6 provides flexible buffering, keeping the clamping force within a moderate range. This ensures stable positioning of the product body 4 and avoids surface damage or deformation due to excessive compression. During the measurement process, the operator can manually rotate the product body 4. The bearing 16 ensures smooth and stable rotation, while the spring 6 continuously absorbs minor vibrations and impacts, thus ensuring smooth rotation. Through this design, the device achieves automatic clamping, flexible protection, and smooth rotation, avoiding the instability factors of manual clamping and improving the reliability and accuracy of the measurement.

[0020] Reference Figure 1 - Figure 5A guide rail 2 is fixedly connected to the upper surface of the base plate 1. The guide rail 2 provides a precise guiding path for the movement of the slider 14 and the movable gauge block 15, ensuring accurate and smooth positioning, improving detection efficiency and repeatability, and avoiding measurement deviation. The slider 14 is slidably connected to the outer wall of the guide rail 2. The movable gauge block 15 is fixedly connected to the upper surface of the slider 14. During the measurement process, the movement of the movable gauge block 15 triggers the dial indicator 12, ensuring that the measuring probe is always in good contact with the product surface. The outer wall of the movable gauge block 15 fits against the product body 4. A connecting block 10 is fixedly connected to the upper surface of the base plate 1. A push rod 11 is slidably connected to the inner wall of the connecting block 10. A spring 9 is sleeved on the outer wall of the push rod 11. The spring 9 provides buffering and elastic support for the movement of the push rod 11 and the movable gauge block 15. To ensure stable contact between the stylus and the workpiece during measurement and prevent measurement errors caused by impact or offset, one end of spring 2 9 is fixedly connected to the outer wall of movable gauge block 15, and the other end of spring 2 9 is fixedly connected to the outer wall of connecting block 1 10. The outer wall of push rod 11 is threadedly connected to the inner wall of movable gauge block 15. Connecting block 2 13 is fixedly connected to the upper surface of base plate 1. Connecting block 2 13 provides installation and guiding support for dial indicator 12, making its position stable during the inspection process and ensuring accurate and reliable measurement data. The inner wall of connecting block 2 13 is slidably connected to one end of dial indicator 12. One end of dial indicator 12 is in contact with push rod 11. Dial indicator 12 collects the outer diameter and tooth surface diameter data of product body 4 in real time, converts the radial offset into a readable value, and is used to determine whether the concentricity is qualified.

[0021] Specifically, the operator first pushes the slider 14 along the guide rail 2 to move the movable gauge block 15 to the designated position, leaving sufficient space for product placement. During the inspection phase, the operator can rotate the product body 4, and the bearing 16 follows to ensure smooth rotation. At the same time, the push rod 11 pushes the movable gauge block 15 to move along the guide rail 2. The movable gauge block 15 maintains contact with the product surface and transmits the displacement to the dial indicator 12. The dial indicator 12 is supported by the connecting block 13 and contacts the push rod 11, enabling real-time acquisition of the workpiece's outer diameter and tooth surface diameter data. The radial offset is converted into a reading for intuitive judgment of whether the concentricity is qualified. The spring 9 provides buffering and elastic support during the movement of the movable gauge block 15, making the measurement process smoother and more stable, preventing impact on the workpiece surface, and improving the reliability and accuracy of the data.

[0022] Working principle: When a pneumatic concentric measuring instrument is required, first push the slider 14 along the guide rail 2 to move the movable measuring block 15 to the designated track position to ensure that the position to be measured has reserved space. Then place the product body 4 on the product base 3 to ensure that the product is roughly in place and aligned. The product body 4 is pressed by the upper extrusion component, and the spring 6 provides buffering force and protection to prevent damage to the product during the subsequent fixing process. After the product is placed in place, start cylinder 8. Cylinder 8 drives the pressure block 7 to move up and down, pressing the pressure block 7 against the product body 4. Spring 6 provides flexible support to ensure that the pressing force is moderate and to protect the product body 4 from damage. At this time, the operator can manually rotate the product body 4. The bearing 16 rotates accordingly, while spring 6 continues to provide protection and buffer to avoid excessive compression. During measurement, the uneven outer surface of the rotating product body 4 radially jumps, pushing the movable gauge block 15 in contact with it. The movable gauge block 15 then drives the push rod 11 connected to it to move. The dial indicator 12 contacts the push rod 11 through the connecting block 2 13. The dial indicator 12 measures the displacement of the push rod 11, which is used to read the outer diameter and tooth surface diameter of the instrument being tested and to observe whether it is within the concentric range. The movement of the movable gauge block 15 and the buffering of the spring 2 9 ensure smooth and stable measurement, avoid damage to the instrument during the testing process, and ensure measurement accuracy and reliability.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic concentric measuring instrument, comprising a base plate (1), characterized in that: A fixing component is provided on the upper surface of the base plate (1); The fixing assembly includes a cylinder (8), which is fixedly connected to the upper surface of the base plate (1). A pressure block (7) is fixedly connected to the output end of the cylinder (8). A bearing (16) is rotatably connected to the inner wall of the pressure block (7). A connecting column (5) is fixedly connected to the outer wall of the bearing (16). A spring (6) is sleeved on the outer wall of the connecting column (5). One end of the spring (6) is fixedly connected to the lower surface of the pressure block (7). The other end of the spring (6) is fixedly connected to the upper surface of the connecting column (5). A product base (3) is fixedly connected to the upper surface of the base plate (1). A product body (4) is sleeved on the outer wall of the product base (3). The product body (4) is in contact with the connecting column (5). A movable gauge block (15) is used to contact the outer peripheral surface of the product body (4). A push rod (11) is connected to the movable gauge block (15). A dial indicator (12) is used to contact the push rod (11) with its measuring end.

2. The pneumatic concentric measuring instrument according to claim 1, characterized in that: The upper surface of the base plate (1) is fixedly connected to a guide rail (2), and a slider (14) is slidably connected to the outer wall of the guide rail (2).

3. A pneumatic concentric measuring instrument according to claim 2, characterized in that: A movable gauge block (15) is fixedly connected to the upper surface of the slider (14).

4. A pneumatic concentric measuring instrument according to claim 3, characterized in that: A connecting block (10) is fixedly connected to the upper surface of the base plate (1).

5. A pneumatic concentric measuring instrument according to claim 4, characterized in that: The inner wall of the connecting block (10) is slidably connected to a push rod (11), and the outer wall of the push rod (11) is fitted with a spring (9).

6. A pneumatic concentric measuring instrument according to claim 5, characterized in that: One end of the second spring (9) is fixedly connected to the outer wall of the movable block (15), and the other end of the second spring (9) is fixedly connected to the outer wall of the first connecting block (10).

7. A pneumatic concentric measuring instrument according to claim 6, characterized in that: The outer wall of the push rod (11) is threaded to the inner wall of the movable block (15), and the upper surface of the base plate (1) is fixedly connected to the connecting block two (13).

8. A pneumatic concentric measuring instrument according to claim 7, characterized in that: The inner wall of the connecting block 2 (13) is slidably connected to one end of the dial indicator (12), and one end of the dial indicator (12) is in contact with the push rod (11).

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