A shaft optical measuring machine for turbocharger rotating shaft detection

Abstract

The utility model belongs to the field of shaft optical measuring machine, concretely relates to a kind of shaft optical measuring machine for turbocharger rotating shaft detection, including cabinet, the inner wall of the cabinet is provided with laser emitter.The utility model is combined by the clamping mechanism of upper end servo motor drive and the radial centering clamping mechanism of lower end worm gear linkage, forms the innovative " upper top down embrace " double stable fixing mode.Its upper end clamping not only provides axial positioning, more reliably pre-tightening force loading to workpiece is realized by the accurate control of servo motor;Lower end drive then ingeniously convert the revolution of driving seat into the rotation of driving disc, by the accurate guidance of arc groove and guide frame, force multiple positioning clamping block to produce strict synchronous radial motion.This design realizes the full process rapid automation from workpiece to be put into clamping, measurement, significantly reduces artificial intervention link and single product detection time, significantly improves detection efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of shaft optical measuring machines, specifically a shaft optical measuring machine for detecting turbocharger shafts. Background Technology

[0002] As a key component for improving engine intake efficiency, the machining accuracy of the core component of the turbocharger, the shaft, directly affects the overall performance and reliability of the turbocharger. During the manufacturing process of the shaft, its dimensions, form and position tolerances, and other geometric parameters need to be precisely measured to ensure that design requirements are met. Currently, the measurement of shaft parts typically employs contact measuring machines or traditional optical measuring equipment. Existing optical measuring machines (EMCs) typically require manual clamping and positioning when inspecting turbocharger shafts. This process is cumbersome and makes it difficult to ensure precise alignment between the shaft and the measurement reference, leading to increased measurement errors. Furthermore, during rotational scanning, traditional EMCs are prone to slight shaft displacement or vibration due to unstable clamping or asynchronous drives, further affecting the accuracy of the measurement data. Some devices use simple three-jaw chucks for fixation, but these are ill-suited to the unique stepped shaft structure of turbocharger shafts and may cause uneven clamping force during high-speed rotational measurements. On the other hand, the drive and positioning structures of existing measuring machines are often independent, lacking a linkage mechanism, resulting in complex equipment structures and increased operating steps. For example, the mechanism driving the rotation of the shaft and the axial positioning mechanism are controlled separately, which not only increases the manufacturing cost of the equipment but also reduces measurement efficiency. In addition, traditional measuring machines require changing fixtures or making cumbersome adjustments when adjusting shafts of different specifications, resulting in poor applicability. Therefore, improvements to existing technologies are necessary. Utility Model Content

[0003] The purpose of this invention is to provide a shaft optical measuring machine for turbocharger shaft inspection, which solves the problems of low clamping efficiency and inaccurate clamping positioning.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an optical measuring machine for inspecting turbocharger shafts, comprising a chassis, a laser emitter disposed on the inner wall of the chassis, a drive seat mounted on the bottom inner side of the chassis via bearings, a rotating seat mounted on the upper interior of the chassis via bearings, a hexagonal rod slidably connected inside the hexagonal hole of the rotating seat, a clamping cone fixedly connected to the lower end of the hexagonal rod, a clamping mechanism disposed on the rotating seat, a drive disk mounted on the interior of the drive seat via bearings, a plurality of evenly distributed positioning clamps slidably connected inside the drive seat, a worm gear fixedly connected to the outer side of the connecting shaft of the drive disk, and a worm gear mounted on the interior of the drive seat via bearings.

[0005] Preferably, a geared motor is bolted inside the chassis, and the output shaft of the geared motor is fixedly connected to the connecting shaft of the drive seat, so that the geared motor can drive the drive seat to rotate.

[0006] Preferably, a guide frame is fixedly installed on the upper end of the drive seat, and the guide frame is slidably connected to the positioning clamp block. The guide frame can guide the movement of the positioning clamp block.

[0007] Preferably, the worm gear meshes with the worm wheel, the positioning clamp is slidably connected to the arc-shaped groove of the drive disc, and a nut block is fixedly installed on the outer side of the worm gear, so that the wrench can drive the worm gear to rotate through the nut block.

[0008] Preferably, a bracket is fixedly installed on the inner bottom of the drive seat, the bracket is connected to the worm gear through a bearing, and a door is hinged to the front of the chassis. The bracket can support the worm gear, making its rotation more stable.

[0009] Preferably, the clamping mechanism includes an internally threaded tube. The internally threaded tube is installed inside the upper end of the rotating seat via a bearing. A screw is connected inside the internally threaded tube via a thread. A bevel gear ring is fixedly installed on the outer side of the internally threaded tube. A drive cover is fixedly installed on the upper end of the rotating seat. A bevel gear is installed inside the drive cover via a bearing. A servo motor is fixedly installed on the upper end of the rotating seat. The servo motor drives the bevel gear to rotate.

[0010] Preferably, the output shaft of the servo motor is fixedly connected to the bevel gear, the bevel gear meshes with the bevel gear ring, the screw is fixedly connected to the hexagonal rod, and the bevel gear can drive the internally threaded tube to rotate through the bevel gear ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model combines an upper servo motor-driven clamping mechanism with a lower worm gear-linked radial centering clamping mechanism, forming an innovative "upper-support, lower-hug" dual-stabilization fixing method. The upper clamping not only provides axial positioning but also achieves reliable pre-tensioning of the workpiece through precise control of the servo motor; the lower drive cleverly converts the revolution of the drive seat into the rotation of the drive disc, and through the precise guidance of the arc-shaped groove and guide frame, forces multiple positioning clamping blocks to produce strictly synchronized radial movement. This design achieves rapid automation of the entire process from workpiece placement to clamping and measurement, significantly reducing manual intervention and the inspection time for single products, and significantly improving inspection efficiency.

[0012] 2. This invention, through a multi-clamp synchronous centering mechanism and stable clamping, physically ensures that the geometric axis of the rotating shaft coincides with the main rotation axis of the equipment, effectively eliminating positioning errors and minor vibrations during measurement caused by inconsistent manual clamping techniques or gaps in the clamps themselves. This extremely high mechanical repeatability positioning accuracy establishes a near-ideal data acquisition benchmark for subsequent non-contact laser scanning, enabling the laser emitter to acquire contour data that truly reflects workpiece machining errors rather than clamping errors, fundamentally guaranteeing the accuracy and repeatability of the measurement data. Attached Figure Description

[0013] Figure 1 This is a perspective view of the overall structure of this utility model; Figure 2 For the present utility model Figure 1 A three-dimensional sectional view; Figure 3 For the present utility model Figure 2 3D sectional view of the drive unit Figure 1 ; Figure 4 For the present utility model Figure 2 3D sectional view of the drive unit Figure 2 ; Figure 5 For the present utility model Figure 3 A 3D view of the drive disk; Figure 6 For the present utility model Figure 3 A magnified 3D view of the positioning clamping block; Figure 7 For the present utility model Figure 2 Enlarged view of the A-section structure; Figure 8 For the present utility model Figure 7 A magnified 3D view of the hexagonal rod.

[0014] In the diagram: 1. Chassis; 2. Laser emitter; 3. Drive base; 4. Gear motor; 5. Rotating base; 6. Hexagonal rod; 7. Clamping cone; 8. Clamping mechanism; 9. Drive disk; 10. Positioning clamp; 11. Guide frame; 12. Worm gear; 13. Worm; 14. Nut block; 15. Bracket; 16. Box door; 81. Internal threaded pipe; 82. Screw; 83. Bevel gear ring; 84. Drive cover; 85. Bevel gear; 86. Servo motor. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-8 An optical measuring machine for inspecting turbocharger shafts includes a housing 1, a laser emitter 2 disposed on the inner wall of the housing 1, a drive seat 3 mounted on the bottom inner side of the housing 1 via bearings, a rotating seat 5 mounted on the upper inner side of the housing 1 via bearings, a hexagonal rod 6 slidably connected inside the hexagonal hole of the rotating seat 5, a clamping cone 7 fixedly connected to the lower end of the hexagonal rod 6, a clamping mechanism 8 disposed on the rotating seat 5, a drive disk 9 mounted on the inside of the drive seat 3 via bearings, a plurality of evenly distributed positioning clamps 10 slidably connected inside the drive seat 3, a worm gear 12 fixedly connected to the outer side of the connecting shaft of the drive disk 9, and a worm 13 mounted on the inside of the drive seat 3 via bearings.

[0017] Please see Figure 1-8 Inside the housing 1, a geared motor 4 is bolted on. The output shaft of the geared motor 4 is fixedly connected to the connecting shaft of the drive seat 3. The geared motor 4 can drive the drive seat 3 to rotate. A guide frame 11 is fixedly installed on the upper end of the drive seat 3. The guide frame 11 is slidably connected to the positioning clamp 10. The guide frame 11 can guide the movement of the positioning clamp 10. The worm 13 meshes with the worm wheel 12. The positioning clamp 10 is slidably connected to the arc groove of the drive disc 9. A nut block 14 is fixedly installed on the outer side of the worm 13. A wrench can drive the worm 13 to rotate through the nut block 14. A bracket 15 is fixedly installed on the bottom inner side of the drive seat 3. The bracket 15 is connected to the worm 13 through a bearing. A door 16 is hinged on the front of the housing 1. The bracket 15 can support the worm 13 and make its rotation more stable.

[0018] Please see Figure 1-8 The clamping mechanism 8 includes an internally threaded tube 81. The internally threaded tube 81 is mounted inside the upper end of the rotating seat 5 via a bearing. A screw 82 is threadedly connected inside the internally threaded tube 81. A bevel gear ring 83 is fixedly mounted on the outer side of the internally threaded tube 81. A drive cover 84 is fixedly mounted on the upper end of the rotating seat 5. A bevel gear 85 is mounted inside the drive cover 84 via a bearing. A servo motor 86 is fixedly mounted on the upper end of the rotating seat 5. The servo motor 86 drives the bevel gear 85 to rotate. The output shaft of the servo motor 86 is fixedly connected to the bevel gear 85. The bevel gear 85 meshes with the bevel gear ring 83. The screw 82 is fixedly connected to the hexagonal rod 6. The bevel gear 85 can drive the internally threaded tube 81 to rotate through the bevel gear ring 83.

[0019] The specific implementation process of this utility model is as follows: 1. Installation and axial fixation of the upper end of the rotating shaft: The operator opens the box door 16 and places the lower center hole of the turbocharger rotating shaft to be tested onto the clamping cone 7 to achieve preliminary axial positioning. The servo motor 86 is started, and its output shaft drives the bevel gear 85 to rotate. The bevel gear 85 meshes with the bevel ring 83 fixed on the internal thread tube 81, thereby driving the internal thread tube 81 to rotate under the support of the bearing. The internal thread tube 81 and the screw 82 form a helical pair. Since the screw 82 is restricted from rotation by sliding connection between the hexagonal rod 6 and the hexagonal hole of the rotating seat 5, the rotation of the internal thread tube 81 will be converted into the linear downward movement of the screw 82. The screw 82 pushes the hexagonal rod 6 and the clamping cone 7 downward, so that the lower end of the rotating shaft is pressed tightly against the center of the drive seat 3. At this point, the axial clamping and fixing of the upper end of the rotating shaft is completed. II. Radial Automatic Centering and Clamping of the Lower End of the Shaft: When the geared motor 4 is started, its output shaft drives the entire drive seat 3 to rotate slowly. The worm gear 13 is fixed to the bottom of the drive seat 3 via the bracket 15, and does not rotate relative to the drive seat 3. When the drive seat 3 rotates, the stationary worm gear 13 meshes with the worm wheel 12. The rotation of the worm wheel 12 forces the coaxial drive disc 9 to slowly rotate inside the drive seat 3. The drive disc 9 has a special arc-shaped groove. One end of multiple positioning clamping blocks 10 is slidably connected to the drive disc 9 through this arc-shaped groove, while the other end is constrained by the guide frame 11 and can only slide radially along the drive seat 3. The rotational motion of the drive disc 9 is converted into synchronous radial linear motion of all the positioning clamping blocks 10 on the guide frame 11 through its arc-shaped groove, causing them to converge towards the center, thereby radially clamping the lower journal of the shaft. Due to the multi-point synchronous motion, the automatic centering function of the shaft is achieved. III. Stable Rotation and Optical Measurement Scanning: After the shaft is reliably axially fixed and radially centered, the geared motor 4 continues to work, driving the entire drive seat 3, the clamped shaft, the rotating seat 5, and the hexagonal rod 6 as a whole to rotate smoothly and continuously. At this time, the laser emitter 2 on the inner wall of the housing 1 usually forms a laser scanning system with sensors such as a CCD camera to continuously scan the surface of the shaft rotating at a constant speed, obtain its comprehensive three-dimensional contour data, and the control system collects these data and analyzes and calculates the key geometric parameters of the shaft such as diameter, roundness, cylindricity, and coaxiality through professional software. IV. Measurement Completion and Shaft Removal: After the measurement is completed, the geared motor 4 stops running. The clamping cone 7 is lifted by the reverse servo motor 86, and the upper end of the shaft is released. At the same time, due to the reverse rotation of the drive disk 9, all the positioning clamps 10 are released radially and synchronously, and the operator can easily remove the shaft being measured.

[0020] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shaft optical measuring machine for inspecting turbocharger shafts, comprising a housing (1), characterized in that: The inner wall of the chassis (1) is provided with a laser emitter (2). The bottom inner side of the chassis (1) is equipped with a drive seat (3) through a bearing. The upper end of the chassis (1) is equipped with a rotating seat (5) through a bearing. A hexagonal rod (6) is slidably connected inside the hexagonal hole of the rotating seat (5). A clamping cone (7) is fixedly connected to the lower end of the hexagonal rod (6). A clamping mechanism (8) is provided on the rotating seat (5). A drive disk (9) is installed inside the drive seat (3) through a bearing. Multiple evenly distributed positioning clamps (10) are slidably connected inside the drive seat (3). A worm gear (12) is fixedly connected to the outside of the connecting shaft of the drive disk (9). A worm (13) is installed inside the drive seat (3) through a bearing.

2. The optical measuring machine for inspecting turbocharger shafts according to claim 1, characterized in that: The geared motor (4) is bolted inside the chassis (1), and the output shaft of the geared motor (4) is fixedly connected to the connecting shaft of the drive seat (3).

3. The optical measuring machine for inspecting turbocharger shafts according to claim 1, characterized in that: A guide frame (11) is fixedly installed on the upper end of the drive seat (3), and the guide frame (11) is slidably connected to the positioning clamp (10).

4. The optical measuring machine for inspecting turbocharger shafts according to claim 1, characterized in that: The worm (13) meshes with the worm wheel (12), the positioning clamp (10) is slidably connected to the arc groove of the drive disk (9), and a nut block (14) is fixedly installed on the outside of the worm (13).

5. The optical measuring machine for inspecting turbocharger shafts according to claim 1, characterized in that: A bracket (15) is fixedly installed on the inner bottom of the drive seat (3). The bracket (15) is connected to the worm gear (13) through a bearing. A door (16) is hinged to the front of the chassis (1).

6. The optical measuring machine for inspecting turbocharger shafts according to claim 1, characterized in that: The clamping mechanism (8) includes an internally threaded tube (81). The internally threaded tube (81) is installed inside the upper end of the rotating seat (5) through a bearing. The internally threaded tube (81) is connected to a screw (82) through a thread. A bevel ring (83) is fixedly installed on the outer side of the internally threaded tube (81). A drive cover (84) is fixedly installed on the upper end of the rotating seat (5). A bevel gear (85) is installed inside the drive cover (84) through a bearing. A servo motor (86) is fixedly installed on the upper end of the rotating seat (5).

7. The optical measuring machine for inspecting turbocharger shafts according to claim 6, characterized in that: The output shaft of the servo motor (86) is fixedly connected to the bevel gear (85), the bevel gear (85) meshes with the bevel ring (83), and the screw (82) is fixedly connected to the hexagonal rod (6).

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