A kind of circumferential runout detection device of high-precision bearing of medical equipment

Abstract

The application relates to the technical field of bearing detection, in particular to a circumferential run-out detection device for high-precision bearings of medical equipment, which comprises a base unit for providing movement and stable support of the device; a height adjustment unit fixed on the base unit and used for carrying and driving a carrying platform to move accurately in the vertical direction; and an angle adjustment unit used for driving a detection execution unit to make angle adjustment around a horizontal axis. The device realizes large-range, stepless and accurate lifting of the carrying platform in the vertical direction through a precision lead screw sliding guide rod mechanism driven by a servo motor, can quickly adapt to bearings with different installation heights, and realizes angle fine adjustment of the detection execution unit through collaborative control of a rotating handle on a transverse support frame and a linear air cylinder. The combined driving mechanism makes the probe have complex spatial angle adaptability, can accurately align bearings with non-horizontal or vertical installation surfaces, ensures that the measurement axis of the detection probe is always perpendicular to and passes through the bearing center, and guarantees detection accuracy.

Description

Technical Field

[0001] This application relates to the field of bearing testing technology, specifically a device for detecting the circumferential runout of high-precision bearings in medical devices. Background Technology

[0002] In the manufacturing, installation, and maintenance of medical equipment (such as CT scanners, MRI systems, and high-end X-ray machines), high-precision bearings, as core rotating components, directly determine the imaging quality, operational stability, and reliability of the entire device. The circumferential runout of a bearing is one of the key indicators for measuring its rotational accuracy. If the runout exceeds tolerance, it can lead to vibration, noise, and even severely affect image clarity and diagnostic accuracy.

[0003] Traditionally, the circumferential runout testing of high-precision bearings is typically performed in a temperature- and humidity-controlled metrology chamber using fixed, large-scale precision measuring instruments. Bearings installed in machines often have varying center heights and axial positions, and their mounting reference surfaces are frequently not horizontal. This necessitates that the testing device possess multi-degree-of-freedom adjustment capabilities to ensure the testing probe is accurately aligned with the bearing's radial testing surface. Existing fixed testing devices struggle to flexibly adjust the position and angle of the testing point, resulting in poor adaptability to bearings of different specifications or installation locations. Furthermore, manual contact measurement is prone to errors due to human factors and is difficult to achieve rapid, repeatable, and accurate positioning. Summary of the Invention

[0004] The technical problem to be solved by this application is to overcome the existing defects and provide a circumferential runout detection device for high-precision bearings in medical devices, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a circumferential runout detection device for high-precision bearings in medical equipment, comprising a base unit;

[0006] A height adjustment unit is provided on the base unit, and its movable end supports and drives the support platform to move precisely in the vertical direction;

[0007] An angle adjustment unit is connected to the support platform, on which a detection execution unit is installed, and drives the detection execution unit to adjust the angle around the horizontal axis;

[0008] The angle adjustment unit consists of a transverse support frame and a mounting side plate. A transverse support frame is provided on one side of the bearing platform. An arc-shaped groove is provided on the mounting side plate located on one side of the transverse support frame. A rotating handle is provided on the transverse support frame. The rotating handle is located in the arc-shaped groove and is used to adjust the position of the transverse support frame.

[0009] A detection execution unit, installed on the angle adjustment unit, is used to perform circumferential runout detection on the bearing under test; the detection execution unit includes: a mounting plate;

[0010] A lateral drive unit is fixed to the mounting plate;

[0011] The detection probe assembly is driven by the lateral drive unit to move laterally relative to the mounting plate, so as to achieve contact or separation between the detection probe and the bearing to be tested.

[0012] As a preferred technical solution of this application, the bearing platform is provided with a rotary drive unit, and the output shaft of the rotary drive unit is connected to the mounting plate of the detection execution unit through a connecting shaft;

[0013] The lower end of the support platform is also equipped with a linear displacement component, which is connected to the connecting shaft through a guide connecting sleeve.

[0014] As a preferred technical solution of this application, the height adjustment unit includes a bracket fixed to the upper surface of the base unit;

[0015] A vertically arranged lead screw mechanism is installed on the side of the bracket;

[0016] A drive source is used to drive the lead screw mechanism to rotate;

[0017] The bearing platform is connected to the lead screw mechanism via a threaded sleeve, thereby converting the rotational motion of the lead screw into the linear lifting motion of the bearing platform.

[0018] As a preferred technical solution of this application, the base unit includes: a flat plate;

[0019] Multiple casters are mounted on the bottom of the flat panel;

[0020] And a counterweight is provided on the plate to increase the overall stability of the device.

[0021] As a preferred technical solution of this application, the lead screw mechanism further includes a guide groove and a sliding guide rod that cooperate with each other, and the sliding guide rod is vertically fixed on the bracket.

[0022] As a preferred embodiment of this application, the detection probe assembly further includes:

[0023] A connecting flange seat is mounted on a mounting plate and is fixedly connected to the output end of the transverse drive unit;

[0024] A probe bracket, fixed to the end of the telescopic end of the transverse drive unit, is a preferred technical solution of this application. The detection probe is an inductive displacement sensor or a laser displacement sensor. The lead screw mechanism also includes a cooperating guide groove and a sliding guide rod, with the sliding guide rod vertically fixed to the bracket.

[0025] As a preferred technical solution of this application, the detection probe is an inductive displacement sensor or a laser displacement sensor.

[0026] Compared with the prior art, the beneficial effects of this application are: this application realizes a wide range, stepless, and precise lifting of the bearing platform in the vertical direction through a precision lead screw sliding guide mechanism driven by a servo motor, and can quickly adapt to bearings with different installation heights.

[0027] The angle fine-tuning of the detection execution unit is achieved through the coordinated control of the rotating handle on the transverse support frame and the linear cylinder. This combined drive mechanism gives the probe complex spatial angle adaptability, enabling precise alignment with bearings whose mounting surfaces are not horizontal or vertical. This ensures that the measurement axis of the detection probe is always vertical and passes through the center of the bearing, guaranteeing the accuracy of the detection.

[0028] The detection execution unit employs a dual-headed cylinder to synchronously drive two symmetrically arranged high-precision probes, achieving smooth and synchronous contact and separation between the probes and the bearing raceway. This process is impact-free and has excellent alignment, protecting not only the precision probes and the bearing surface but also ensuring the synchronicity and comparability of the data from the two measurement points. Combined with extremely low-speed uniform rotation drive, this ultimately achieves highly repeatable and high-resolution acquisition of the bearing's circumferential runout values. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this application;

[0030] Figure 2 This is the main view of this application;

[0031] Figure 3 This is the left view of this application;

[0032] Figure 4 This is a schematic diagram of the support plate installation structure.

[0033] In the diagram: 1. Detection probe, 2. Connecting shaft, 3. Connecting flange seat, 4. Lateral drive unit, 5. Mounting support plate, 6. Bearing platform, 7. Bracket, 8. Caster wheel, 9. Flat plate, 10. Counterweight block, 11. Mounting side plate, 12. Lateral support frame, 13. Rotary drive unit, 14. Base unit, 15. Linear displacement component, 16. Guide groove, 17. Threaded sleeve, 18. Sliding guide rod, 19. Drive source, 20. Probe bracket. Detailed Implementation

[0034] 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 in this application (for ease of description and understanding, hereinafter referred to as...), Figure 2 (The above is described above). All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0035] Please see Figure 1-4 This application provides a technical solution: a circumferential runout detection device for high-precision bearings in medical equipment, wherein the base unit 14 consists of a rectangular plate 9 with sufficient rigidity and strength and casters 8 with brakes. To enable flexible movement and positioning of the device, four casters 8 with brakes are installed at the four corners of the lower surface of the plate 9. This allows the operator to easily move the device to the vicinity of the bearing installation position and stably fix it at the working point by applying the brakes.

[0036] During the testing process, when the testing probe 1 comes into contact with the bearing being tested, a torque may be generated that causes the device to tilt forward. In this embodiment, a counterweight 10 is provided on the upper surface of the plate 9, on the side away from the testing end. By increasing the weight at the rear of the device, the counterweight 10 effectively balances the tilting torque, significantly improving the overall stability and anti-tipping ability of the device during the testing process, and ensuring the reliability of the measurement data.

[0037] The height adjustment unit is vertically fixed to one end of the plate 9 of the base unit 14, enabling the detection probe 1 to be adjusted in a wide range and with high precision in the vertical direction.

[0038] The unit includes a bracket 7 that is vertically and securely mounted on a flat plate 9. The bracket 7 is equipped with a lead screw drive mechanism and a guide mechanism consisting of a guide groove 16 and a sliding guide rod 18. The guide groove 16 is located on the side of the bracket 7, and the sliding guide rod 18 is parallel to the lead screw and vertically fixed to the bracket 7, engaging with the through holes on both sides of the bearing platform 6 to provide precise guidance.

[0039] The servo motor 19, which serves as the drive source, is mounted on top of the bracket 7 via a flange. Its output shaft is directly connected to the top of the lead screw via a high-rigidity coupling to provide smooth rotational power.

[0040] The screw engages with the lead screw via a threaded sleeve 17, while its back side engages with the sliding guide rod 18 via the support platform 6. This converts the rotational motion of the lead screw into precise linear lifting and lowering motion of the support platform 6 along the sliding guide rod 18. The drive source 19 can reverse direction according to commands, thereby driving the support platform 6 and all components above it to precisely stop at any desired height position to accommodate bearings at different installation heights.

[0041] The angle adjustment unit is connected to the bearing platform 6 of the height adjustment unit, which drives the detection execution unit to make fine adjustments to the pitch angle around the horizontal axis, ensuring that the detection probe 1 can be aligned with the radial detection surface of the bearing at the correct angle, and to perform detection on bearings in various postures in a simulated state.

[0042] Specifically, the angle adjustment unit consists of a transverse support frame 12 and a mounting side plate 11. A transverse support frame 12 is provided on one side of the bearing platform 6. An arc-shaped groove is provided on the mounting side plate 11 located on one side of the transverse support frame 12. A rotating handle is provided on the transverse support frame 12. The rotating handle is located in the arc-shaped groove and is used to adjust the position of the transverse support frame 12. A square positioning plate on the rotating handle is used to fix the position of the rotating handle through a pin shaft, thereby adjusting the angle of the transverse support frame 12.

[0043] A stepper motor with a rotary drive unit 13 is installed on the transverse support frame 12. The output shaft of the stepper motor is vertically downward and is connected to the mounting plate 5 of the detection and execution unit below through a rigid connecting shaft 2.

[0044] Meanwhile, a cylinder serving as the linear displacement element 15 is mounted on the transverse support frame 12. The piston rod end of this cylinder is connected to the detection execution unit. By coordinating the minute angular rotation of the stepper motor 13 and the precise extension and retraction of the linear displacement element 15, the angle and position adjustment of the entire detection execution unit can be jointly driven, enabling the detection probe 1 to be perfectly aligned with bearings whose mounting surfaces are not vertical or horizontal.

[0045] The detection execution unit includes a mounting plate 5 and a transverse drive unit 4. The double-headed cylinder (double-sided output cylinder) of the transverse drive unit 4 is fixed to the lower surface of the mounting plate 5 by bolts.

[0046] The detection probe assembly also includes a connecting flange seat 3, which serves as a connecting link. Its upper end is connected to the connecting shaft 2, and its lower end is connected to the mounting support plate 5. As the height adjustment unit moves up and down, it drives the detection execution unit to adjust its height.

[0047] The two piston rod output ends of the transverse drive unit 4 are fixed with probe brackets 20 by bolts, and the high-precision detection probe 1 is precisely mounted on the probe brackets 20.

[0048] Preferably, the high-precision detection probe 1 is an inductive displacement sensor.

[0049] By controlling the extension and retraction of the lateral drive unit 4, opposing (approaching) or opposing (moving away) movements are achieved. This allows the detection probe 1 to smoothly contact or leave the outer or inner raceway of the bearing under test, completing the alignment before testing and the reset after testing.

[0050] When in use: The operator moves the device to the vicinity of the bearing of the medical device to be tested using the caster wheel 8, selects a suitable working position, and then locks the brake of the caster wheel 8.

[0051] Start the drive source 19 of the height adjustment unit to drive the bearing platform 6 to rise and fall, and initially adjust the detection probe 1 to a height that is approximately the same as the bearing centerline.

[0052] The stepper motor 13 and linear displacement component 15 of the coordinated control angle adjustment unit ensure that the measuring axis of the detection probe 1 is precisely aligned with the radial section of the bearing to be measured, thus ensuring that the measuring direction passes through the center of the bearing.

[0053] The transverse drive unit 4 of the control and detection execution unit drives the two detection probes 1 to smoothly contact the bearing raceway and maintain an appropriate measuring force. Subsequently, the rotary drive unit 13 rotates at a very low and uniform speed. During this period, the detection probes 1 continuously collect the radial displacement change during the bearing rotation process, i.e., the circumferential runout value, and transmit the signal to an external data acquisition and processing system in real time.

[0054] After the test is completed, the transverse drive unit 4 is retracted, causing the test probe 1 to disengage from the bearing. Finally, the brake on the caster wheel 8 is released, and the device is moved away, completing all the testing work.

[0055] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting circumferential runout of a high-precision bearing in medical equipment, characterized in that: Including base unit (14); A height adjustment unit is provided on the base unit, and its movable end supports and drives the support platform (6) to move precisely in the vertical direction; An angle adjustment unit is connected to the bearing platform (6), on which a detection execution unit is provided, and drives the detection execution unit to adjust the angle around the horizontal axis; The angle adjustment unit consists of a transverse support frame (12) and a mounting side plate (11). A transverse support frame (12) is provided on one side of the bearing platform (6). An arc groove is provided on the mounting side plate (11) located on one side of the transverse support frame (12). A rotating handle is provided on the transverse support frame (12). The rotating handle is located in the arc groove and is used to adjust the position of the transverse support frame (12). The detection execution unit is installed on the angle adjustment unit and is used to perform circumferential runout detection on the bearing under test; the detection execution unit includes: a mounting plate (5). The transverse drive unit (4) is fixed to the mounting plate (5); The detection probe assembly is driven by the lateral drive unit (4) to move laterally relative to the mounting plate (5) to achieve contact or separation between the detection probe (1) and the bearing to be tested.

2. The circumferential runout detection device for high-precision bearings in medical equipment according to claim 1, characterized in that: The carrying platform (6) is provided with a rotary drive unit (13), and the output shaft of the rotary drive unit (13) is connected to the mounting plate (5) of the detection execution unit through a connecting shaft (2); The lower end of the bearing platform (6) is also provided with a linear displacement component (15), which is connected to the connecting shaft (2) through a guide connecting sleeve.

3. The circumferential runout detection device for high-precision bearings in medical equipment according to claim 1, characterized in that: The height adjustment unit includes a bracket (7) fixed to the upper surface of the base unit (14). A vertically arranged lead screw mechanism is installed on the side of the bracket (7); The drive source (19) is used to drive the lead screw mechanism to rotate; The bearing platform (6) is connected to the lead screw mechanism through a threaded sleeve (17), thereby converting the rotational motion of the lead screw into the linear lifting motion of the bearing platform (6).

4. The circumferential runout detection device for high-precision bearings in medical equipment according to claim 1, characterized in that: The base unit (14) includes: a flat plate (9); Multiple casters (8) are provided at the bottom of the flat plate (9); And a counterweight (10) is provided on the plate (9) to increase the overall stability of the device.

5. The circumferential runout detection device for high-precision bearings in medical equipment according to claim 3, characterized in that: The lead screw mechanism also includes a guide groove (16) and a sliding guide rod (18) that cooperate with each other, and the sliding guide rod (18) is vertically fixed on the bracket (7).

6. The circumferential runout detection device for high-precision bearings in medical equipment according to claim 1, characterized in that: The detection probe assembly also includes: The connecting flange seat (3) is mounted on the mounting plate (5) and is fixedly connected to the output end of the transverse drive unit (4); The probe bracket (20) is fixed to the end of the telescopic end of the transverse drive part (4) and is used to install the detection probe (1).

7. The circumferential runout detection device for high-precision bearings in medical equipment according to claim 1, characterized in that: The detection probe (1) is an inductive displacement sensor or a laser displacement sensor.

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