Vehicle hub bearing testing machine

Abstract

A vehicle hub bearing testing machine, which belongs to the technical field of bearing testing apparatuses. The vehicle hub bearing testing machine comprises an apparatus main body structure, a hydraulic loading device and an electrical control device, wherein the apparatus main body structure mainly consists of a support platform, a base, a hub bearing fixing disc, a hub bearing fixing seat, a radial rotating handwheel and an axial rotating handwheel; the base is arranged on the support platform by means of a driving assembly, and the base is driven to axially move by means of the axial rotating handwheel; one side of the base is a vertical surface perpendicular to the support platform; and one end of the hub bearing fixing seat is mounted on the vertical surface by means of the driving assembly and the radial rotating handwheel, and the hub bearing fixing disc is movably connected to the other end of the hub bearing fixing seat. By means of the above measures, the present invention achieves the goal of understanding the formation mechanism of fretting wear on a contact surface of a vehicle hub bearing under different conditions, thereby enabling the evaluation of different vehicle hub bearings.

Description

Automobile wheel hub bearing testing machine Technical Field

[0001] The invention belongs to the technical field of bearing testing equipment, in particular to an automobile wheel hub bearing testing machine. Background Art

[0002] Compared to developed countries, my country's automotive industry started relatively late. However, the rapidly growing domestic market and relatively low production costs have attracted global automotive industry resources to my country. As a result, many high-end brands have established manufacturing bases in my country. This transfer of high-end brands has significantly enhanced the technological strength and manufacturing capabilities of my country's automobile and parts industries. With the development of technology, the use and volume of automotive hub bearings, as metal components that support the inner profile of the tire, are increasing, and the requirements for automotive hub bearings are also becoming increasingly higher.

[0003] The friction and wear conditions within automotive wheel hub bearings are primarily determined by external excitation. Due to the unique contact conditions between the rolling elements and raceways, the varying deformation states of the metal surfaces caused by vibration and alternating loads can lead to very subtle relative motion on the contact surfaces, a condition known as fretting wear. Fretting wear is irreversible and can cause automotive wheel hub bearing failure. GB / T13353-2017 Test Methods for Automotive Wheel Hub Bearings (6.8) assesses the wear of the inner and outer raceway contact surfaces of wheel hub bearing units during vehicle transportation.

[0004] However, the test specifies an ambient temperature of 20°C ± 15°C. In actual application environments, the temperature difference far exceeds this range. This is especially true in my country, a country with a vast territory spanning from north to south and multiple thermal zones, including tropical, subtropical, and temperate zones. This results in a complex and changeable climate with large temperature differences. Therefore, higher requirements are placed on the testing machine. Summary of the Invention

[0005] In order to solve the technical problem that the temperature of the testing machine in the prior art cannot meet higher requirements, the purpose of the present invention is to provide an automobile wheel hub bearing testing machine, including a main structure of the equipment, a hydraulic loading device and an electrical control device. The main structure of the equipment includes a wheel hub bearing fixing seat and a wheel hub bearing fixing plate. One end of the wheel hub bearing fixing seat is installed on the vertical plane through a drive assembly and a radially rotating handwheel. The wheel hub bearing fixing plate is movably connected to the other end of the wheel hub bearing fixing seat. The evaluation of the automobile wheel hub bearing is completed by recording the micro-wear displacement of the wheel hub bearing and other conditions.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned technical purpose is: a car wheel hub bearing testing machine, including an equipment main structure, a hydraulic loading device and an electrical control device, the equipment main structure is mainly composed of a support platform, a base, a wheel hub bearing fixing plate, a wheel hub bearing fixing seat, a radial rotating handwheel and an axial rotating handwheel, wherein the base is set on the support platform through a driving assembly, and the base is driven to move axially by the axially rotating handwheel, one side of the base is a vertical plane perpendicular to the support platform, one end of the wheel hub bearing fixing seat is installed on the vertical plane through the driving assembly and the radially rotating handwheel, and the wheel hub bearing fixing plate is movably connected to the other end of the wheel hub bearing fixing seat.

[0007] For further optimization, a radial scale for measuring the test radius of the hub bearing is provided on the vertical surface of the base; and an axial scale for the axial movement distance of the hub bearing is provided on the supporting platform.

[0008] Further optimization is that the support platform is parallel to the base, the base is arranged on the support platform, and a screw rod is installed at the bottom of the base.

[0009] Further optimized, the axial scale is parallel to the base, and the radial scale is perpendicular to the base.

[0010] Further optimized, the hub bearing fixing seat is mounted on the screw, and the radial rotation of the hand wheel drives the hub bearing fixing seat to move through the screw.

[0011] Further optimization is performed, the main structure of the equipment and the hydraulic loading device are connected to the upper electrical control device, and the environmental box is connected to the main structure of the equipment.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1) The present invention includes a main structure of the equipment, a hydraulic loading device and an electrical control device, and realizes the formation mechanism of fretting wear of the contact surface of automobile wheel hub bearings under different conditions;

[0014] 2) The present invention achieves the evaluation of different automobile hub bearings by replacing different hub bearing fixing plates and installing different automobile hub bearings;

[0015] 3) The present invention adjusts the position of the hub bearing fixing seat by adjusting the radial rotation hand wheel, thereby measuring automobile hub bearings of different radii.

[0016] BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a structural diagram of an automobile wheel hub bearing fretting wear testing machine according to the present invention;

[0018] FIG2 is a main structural diagram of the automobile wheel hub bearing fretting wear test of the present invention;

[0019] FIG3 is a diagram of the fretting wear loading structure of an automobile wheel hub bearing according to the present invention;

[0020] Figure markings: 1. Environmental chamber, 2. Equipment main structure, 21. Support platform, 22. Axial scale, 23. Base, 24. Radial scale, 25. Hub bearing fixing plate, 26. Hub bearing fixing seat, 27. Radial rotation handwheel, 28. Axial rotation handwheel, 3. Hydraulic loading device, 31. Radial servo valve, 32. Radial loading cylinder, 33. Force sensor, 34. Radial spherical bearing assembly, 35. Loading arm, 36. Loading connecting block, 37. Axial spherical bearing assembly, 38. Force sensor, 39. Axial servo valve, 310. Axial loading cylinder, 311. Cast iron platform, 4. Electrical control device. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments that are easily changed or replaced by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] A vehicle wheel hub bearing testing machine, as shown in Figures 1 and 2, includes a main structure 2, a hydraulic loading device 3, and an electrical control device 4. The main structure 2 is primarily composed of a support platform 21, a base 23, a hub bearing fixing plate 25, a hub bearing fixing seat 26, a radially rotating handwheel 27, and an axially rotating handwheel 28. The base 23 is disposed on the support platform 21 via a drive assembly and is driven axially by the axially rotating handwheel 28. One side of the base 23 is a vertical surface perpendicular to the support platform 21. One end of the hub bearing fixing seat 26 is mounted on the vertical surface via a drive assembly and a radially rotating handwheel 27. The other end of the hub bearing fixing seat 26 is movably connected to the hub bearing fixing plate 25. The hub bearing fixing plate 25 is used to fix the hub bearing. Different automobile wheel hub bearings can be installed by replacing different fixing plates. The hub bearing fixing seat 26 is used to connect the hub bearing fixing plate 25 and the base 23.

[0023] A radial scale 24 for measuring the test radius of the hub bearing is also provided on the vertical surface of the base 23; an axial scale 22 for measuring the axial movement distance of the hub bearing is provided on the support platform 21. The axial scale 22 is parallel to the base 23, and the radial scale 24 is perpendicular to the base 23. The axial scale 22 and the radial scale 24 are used to measure the movement distance between the bearing fixing seat 26 and the base 23.

[0024] The support platform 21 is parallel to the base 23, which is mounted on the support platform 21. A screw is mounted on the bottom of the base 23. The hub bearing holder 26 is mounted on the screw. A radially rotating handwheel 27 drives the hub bearing holder 26 via the screw. By adjusting the radially rotating handwheel 27, the position of the hub bearing holder 26 is adjusted, allowing measurement of hub motor bearings of different radii.

[0025] The main structure 2 of the equipment and the hydraulic loading device 3 are connected to the upper electrical control device 4, and the environmental box 1 is connected to the main structure 2 of the equipment. The environmental box 1 simulates different temperatures and humidity under various conditions.

[0026] During operation, the automobile wheel hub bearing testing machine is configured such that the automobile wheel hub bearing is fixed to the main structure 2 of the device, and the environmental chamber 1 is moved to the wheel hub bearing mounting position, placing the wheel hub bearing within the environmental chamber. A hydraulic loading device 3 provides hydraulic power to the wheel hub bearing, and an electrical control device 4 adjusts and controls the internal temperature and humidity of the environmental chamber 1 to simulate the temperature and humidity of different environments. The electrical control device 4 adjusts and controls the hydraulic servo valve of the main structure 2 of the device to achieve the application of the wheel hub bearing ambient temperature and alternating load. The acquisition device records the fretting wear displacement of the wheel hub bearing during the test, the alternating load loading frequency, the loading force, and the environmental chamber temperature, and saves and generates a report.

[0027] Example 1

[0028] A fan bearing grease filling and cleaning device, as shown in Figures 1 and 3, controls a radial servo valve 31 to control a radial loading cylinder 32 to reciprocate at a high frequency of 5 Hz, transmitting hydraulic pressure to a force sensor 33. The hydraulic pressure is then transferred to a radial spherical bearing assembly 34 via a force sensor 38. The radial spherical bearing assembly 34 is connected to a loading block 36, which is connected to a loading arm 35, which is connected to a wheel hub bearing, thereby transmitting radial force to the wheel hub bearing. Similarly, an axial loading device controls an axial loading cylinder 310 to control a 5 Hz reciprocating motion to transmit hydraulic pressure to a force sensor 38. The hydraulic pressure is then transferred to an axial spherical bearing assembly 37 via a loading block 36, which is connected to a loading arm 35, which is connected to a wheel hub bearing, thereby transmitting axial force to the wheel hub bearing. The frequencies of the radial and axial loading devices are kept in phase. All tests were simulated on a cast iron platform 311 while being subjected to external excitation.

Claims

1. An automobile wheel hub bearing testing machine, comprising a main equipment structure (2), a hydraulic loading device (3) and an electrical control device (4), characterized in that: The main structure (2) of the equipment mainly consists of a support platform (21), a base (23), a hub bearing fixing plate (25), a hub bearing fixing seat (26), a radially rotating hand wheel (27) and an axially rotating hand wheel (28), wherein the base (23) is arranged on the support platform (21) through a driving component, and the base (23) is driven to move axially through the axially rotating hand wheel (28), one side of the base (23) is a vertical surface perpendicular to the support platform (21), one end of the hub bearing fixing seat (26) is installed on the vertical surface through the driving component and the radially rotating hand wheel (27), and the hub bearing fixing plate (25) is movably connected to the other end of the hub bearing fixing seat (26).

2. The automobile wheel hub bearing testing machine according to claim 1, characterized in that: A radial scale (24) for measuring the test radius of the wheel hub bearing is also provided on the vertical surface of the base (23); and an axial scale (22) for measuring the axial movement distance of the wheel hub bearing is provided on the support platform (21).

3. The automobile wheel hub bearing testing machine according to claim 1, characterized in that: The support platform (21) is parallel to the base (23); the base (23) is arranged on the support platform (21); and a screw rod is installed at the bottom of the base (23).

4. The automobile wheel hub bearing testing machine according to claim 1, characterized in that: The axial scale (22) is parallel to the base (23), and the radial scale (24) is perpendicular to the base (23).

5. The automobile wheel hub bearing testing machine according to claim 1, characterized in that: The wheel hub bearing fixing seat (26) is mounted on the lead screw, and the hand wheel (27) is rotated radially to drive the wheel hub bearing fixing seat (26) to move via the lead screw.

6. The automobile wheel hub bearing testing machine according to claim 1, characterized in that: The equipment main structure (2) and the hydraulic loading device (3) are connected to the upper electrical control device (4), and the environmental chamber (1) is connected to the equipment main structure (2).

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