A loaded hub bearing noise detection device

Abstract

The utility model provides a kind of loading type hub bearing detects noise detection device, including loading arm, and the side of loading arm is equipped with tooling;The lower portion of the tooling is provided with the hub bearing to be measured, and sensor is equipped in the tooling, and the end of the sensor is used to contact the outer flange of the hub bearing;By being equipped with the loading arm connected with tooling, so that external force equipment can continuously exert the axial and radial load simulating real driving state to the outer flange of hub bearing in detection process;Under this load condition, the sensor fixed in tooling directly contacts bearing outer flange to collect vibration signal, while the inner flange driven by fixed base end rotates, so that the stress and motion condition of hub bearing under whole vehicle loading are simulated completely, the limitation of traditional no-load detection mode is effectively overcome, and vibration anomaly caused by raceway deformation, ball wear and other deep defects under load can be accurately detected.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub bearing testing technology, specifically to a loading-type wheel hub bearing noise detection device. Background Technology

[0002] In existing technologies, vibration and noise detection of wheel hub bearings is typically achieved by placing a clamping fixture above the bearing. This fixture is driven by a cylinder to clamp the outer flange of the bearing, while a sensor inside extends to contact the outer diameter of the flange. Subsequently, a base located below the bearing is rotated by a motor, thereby causing the inner flange of the bearing to rotate for vibration measurement. However, this type of fixture only performs clamping and detection functions, and its structure differs significantly from the actual operating conditions of a vehicle. During vehicle operation, wheel hub bearings are constantly subjected to various loads from the vehicle body. The aforementioned detection method cannot simulate the application of such loads during the detection process, resulting in measurement results that only reflect preliminary defects on the bearing surface. It cannot effectively identify vibration and noise problems caused by deeper factors such as raceway deformation and steel ball wear under continuous load. Utility Model Content

[0003] This invention proposes a loading-type wheel hub bearing noise detection device, which solves the problem that in the prior art, the measurement results can only reflect the preliminary defects on the bearing surface because it is impossible to simulate the application of such loads during the detection process. This makes it impossible to effectively identify the vibration and noise problems caused by deeper factors such as raceway deformation and steel ball wear under continuous load.

[0004] The technical solution of this utility model is implemented as follows: A loading-type wheel hub bearing noise detection device includes a loading arm, and a tooling is provided on one side of the loading arm; The tooling is provided with a wheel hub bearing to be tested below it, and the tooling is equipped with a sensor. The end of the sensor is used to contact the outer flange of the wheel hub bearing. A fixed base is provided below the hub bearing, and the fixed base is connected to a drive mechanism that drives its rotation.

[0005] Furthermore, the bottom of the tooling is provided with multiple clamping blocks for clamping the outer flange of the wheel hub bearing. The clamping blocks are hydraulically driven or pneumatically driven rotating clamping blocks.

[0006] Furthermore, the tooling is provided with a receiving groove, in which the sensor can be accommodated.

[0007] Furthermore, the sensor is an accelerometer.

[0008] Furthermore, the loading arm and the tooling are an integrated structure.

[0009] Furthermore, the driving mechanism is a motor.

[0010] The beneficial effects of the technical solution provided in this application are as follows: 1. This application, by setting a loading arm connected to the tooling, enables the external force-applying equipment to continuously apply axial and radial loads simulating real driving conditions to the outer flange of the wheel hub bearing during the testing process; under this load condition, the sensor fixed in the tooling directly contacts the outer flange of the bearing to collect vibration signals, while the inner flange driven by the fixed base rotates, thereby completely simulating the force and motion conditions of the wheel hub bearing under the loading of the whole vehicle, effectively overcoming the limitations of traditional no-load testing methods, and can accurately detect vibration abnormalities caused by deep defects such as raceway deformation and steel ball wear under load; 2. In this application, the bottom of the tooling uses multiple hydraulically or pneumatically driven rotating clamping blocks to clamp and fix the outer flange of the wheel hub bearing. This structure not only provides a stable and powerful clamping force far superior to the traditional cylinder clamping method, but also ensures a rigid connection between the tooling and the bearing without relative displacement under simulated load and rotation conditions, thus making the transmission path of vibration signals more reliable. At the same time, the sensor is housed in a specially designed receiving slot in the tooling. This layout not only provides effective physical protection for the sensor, but more importantly, it establishes and maintains a constant and precise contact state between its detection end and the outer circumferential surface of the bearing outer flange, effectively avoiding measurement errors caused by changes in contact pressure or position. In addition, the loading arm and the tooling adopt an integrated molding structure, which greatly enhances the structural rigidity and integrity of the entire loading system, allowing the simulated load from the external force application equipment to be transmitted to the bearing without loss or lag, truly replicating the vehicle's load conditions. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the loading-type wheel hub bearing noise detection device of this utility model; Figure 2 This is an exploded view of the loading-type wheel hub bearing noise detection device of this utility model; Figure 3 This is a detailed anatomical view of the loading-type wheel hub bearing noise detection device of this utility model.

[0013] In the diagram: 1 Loading arm, 2 Sensor, 3 Wheel hub bearing, 4 Fixed base, 5 Tooling, 51 Clamping block, 52 Receiving groove. Detailed Implementation

[0014] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] The loading-type wheel hub bearing noise detection device described in this embodiment is based on the core design concept of applying a load simulating real driving conditions to the wheel hub bearing 3 during the detection process through mechanical structure innovation, thereby achieving accurate detection of deep defects in the bearing under load.

[0016] See Figures 1 to 3 The overall layout of the device clearly demonstrates the logical relationship between its force application and detection. The loading arm 1 set on the top of the device is a key component for realizing its load simulation function. One end of the loading arm 1 is firmly connected to the side of the tooling 5. Preferably, the two are manufactured into a complete rigid body using an integral molding process. This completely eliminates the possibility of gaps and deformation at the connection point, ensuring that the load from the external force-applying equipment can be completely and losslessly transferred to the subsequent structure.

[0017] The tooling 5, as a core component directly acting on the wheel hub bearing 3, innovatively features multiple rotatable clamping blocks 51 at its bottom. These clamping blocks 51 are preferably driven by a hydraulic or pneumatic system. During operation, they can rotate synchronously at a certain angle, thereby firmly clamping the outer flange surface of the wheel hub bearing 3 circumferentially. Compared to traditional vertical clamping, this rotary clamping method provides a more stable and powerful clamping force, forming a rigid connection and laying a solid foundation for subsequent load application and vibration transmission.

[0018] One or more receiving grooves 52 are precisely formed on the body of the tooling 5. The main function of the receiving groove 52 is to provide a protected mounting space and a precise positioning reference for the sensor 2. As a preferred embodiment, the sensor 2 is configured to be able to extend and retract slightly along the receiving groove 52 to ensure that its sensing end can abut against the outer circumferential surface of the outer flange of the wheel hub bearing 3 with a constant contact pressure. In this embodiment, the sensor 2 is specifically selected as a high-precision accelerometer, whose task is to capture the minute vibrations generated by the bearing during operation.

[0019] The wheel hub bearing 3 being inspected is positioned below the fixture 5. The bottom of its inner flange is connected to a fixed base 4, which is not stationary but is fixed to the output of a drive mechanism (not shown in the figure, typically a motor). This drive mechanism is configured to drive the fixed base 4 and the inner flange of the wheel hub bearing 3 connected thereto to rotate smoothly at a set speed, thereby simulating the driving state of the wheel.

[0020] The operating procedure of the device is as follows: First, the fixture 5 descends to contact the outer flange of the wheel hub bearing 3 and is locked by the rotating clamping block 51. Then, an external force-applying device (such as a hydraulic actuator) applies a precisely calculated force at the distal end of the loading arm 1. This force is equivalent to a combined axial and radial load of approximately 0.6g of lateral acceleration experienced by the vehicle on a bumpy road. Immediately afterwards, the drive mechanism is activated, causing the fixed base 4 and the inner flange of the wheel hub bearing 3 to rotate at high speed.

[0021] Under this simulated "loaded and rotating" condition, if the raceways and steel balls inside the hub bearing 3 have deep-seated defects such as shape changes or wear that only appear under load, specific vibration signals will be generated. This vibration is efficiently transmitted to the closely contacting acceleration sensor 2 through the rigidly clamped outer flange and the solid structure of the tooling 5.

[0022] Sensor 2 converts the collected mechanical vibration signal into a charge signal, which is then converted into a voltage signal by an external signal conditioning circuit, and amplified and filtered. The pre-processed signal is sent to the analysis system for comprehensive diagnosis, including time-domain analysis, frequency-domain analysis, and envelope analysis. Finally, based on a preset threshold or characteristic frequency model, the system automatically determines whether the detected wheel bearing 3 is a qualified or defective product, and triggers the corresponding sorting mechanism to complete the automatic placement or rejection operation.

[0023] In summary, the device described in this embodiment successfully introduces a realistic mechanical environment into the detection process through the synergistic action of the loading arm 1, the integrated tooling 5, and the rotating clamping block 51; the sensor 2, precisely positioned by the receiving groove 52, ensures the reliability of signal acquisition; and the combination of the fixed base 4 and the drive mechanism simulates the operating conditions. This organic combination of mechanical structures ultimately achieves high-precision and high-reliability detection of the vibration and noise of wheel hub bearings under simulated real load conditions, effectively filtering out deep-seated defects that only become apparent under load.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 loading-type wheel hub bearing noise detection device, characterized in that, Includes a loading arm (1), and a tooling (5) is provided on one side of the loading arm (1). The tooling (5) is provided with a wheel hub bearing (3) to be tested below it, and the tooling (5) is provided with a sensor (2), the end of which is used to contact the outer flange of the wheel hub bearing (3). A fixed base (4) is provided below the hub bearing (3), and the fixed base (4) is connected to a drive mechanism that drives its rotation.

2. The loading-type wheel hub bearing noise detection device as described in claim 1, characterized in that, The bottom of the tooling (5) is provided with multiple clamping blocks (51) for clamping the outer flange of the wheel hub bearing (3). The clamping blocks (51) are hydraulically driven or pneumatically driven rotating clamping blocks.

3. The loading-type wheel hub bearing noise detection device as described in claim 1, characterized in that, The tooling (5) has a receiving groove (52) on it, and the sensor (2) can be accommodated in the receiving groove (52).

4. The loading-type wheel hub bearing noise detection device as described in claim 1, characterized in that, The sensor (2) is an acceleration sensor.

5. The loading-type wheel hub bearing noise detection device as described in claim 1, characterized in that, The loading arm (1) and the tooling (5) are an integral structure.

6. The loading-type wheel hub bearing noise detection device as described in claim 1, characterized in that, The driving mechanism is a motor.

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