Hub bearing durability testing machine

Abstract

A hub bearing durability testing machine provided by the present invention comprises an environment assembly, a loading assembly and a detection assembly, the environment assembly comprises a box body and a high and low temperature adjusting box, the box body is internally provided with a detection station for installing a to-be-tested bearing, the high and low temperature adjusting box is used for adjusting the temperature in the box body, and the loading assembly is used for loading the to-be-tested bearing. The detection assembly comprises a main shaft, one end of the main shaft extends into a detection station in the box body and can be connected with an inner flange plate of a bearing to be detected, the loading assembly comprises an axial loading piece, a radial loading piece and an adjusting piece, one end of the adjusting piece is connected with an outer flange plate of the bearing to be detected, and the other end of the adjusting piece is connected with a bearing to be detected. And the other end of the adjusting piece is connected with the axial loading piece and the radial loading piece. In order to overcome the defects in the prior art, the invention provides the hub bearing durability testing machine which can better meet complex operation requirements and environments.

Description

Technical Field

[0001] The invention relates to the field of bearing detection and testing equipment, in particular to a wheel hub bearing durability testing machine. Background Art

[0002] Hub bearings are one of the key parts of automobiles. Hub bearings are installed on each wheel. The main function of hub bearings is to bear weight and provide precise guidance for the rotation of the hub, transmit the power of the car to the ground through the tire, and drive the car forward. When the car is driving, the hub bearings must rotate and bear radial and axial loads. Common hub bearings include first-generation, second-generation, and third-generation hub bearings. The fourth-generation hub bearings have been developed but not applied in large quantities. The durability of hub bearings directly determines its life and driving safety. Durability testing of hub bearings has become a must-check item for OEMs and bearing manufacturers. There are basically two types of existing hub bearing durability testing machines: one is to install a set of hub bearings, which has higher requirements for supporting the main shaft; the other is to install two sets of hub bearings, which eliminates the axial load of the supporting main shaft, but the tests of the two sets of hub bearings will affect each other. However, the two structural types of the existing technology can only perform some durability tests with fixed loads and fixed speeds, and it is difficult to verify the working conditions with high requirements such as variable speed and variable load or operating in complex environments. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a wheel hub bearing durability testing machine that can better cope with complex operating requirements and environments.

[0004] To achieve the above-mentioned purpose, the present invention provides a wheel hub bearing durability testing machine, including an environmental component, a loading component and a detection component, the environmental component includes a box body and a high and low temperature adjustment box, the box body is provided with a detection station for installing a bearing to be tested, the high and low temperature adjustment box is used to adjust the temperature in the box body, the detection component includes a main shaft, one end of the main shaft extends into the detection station in the box body and can be connected to the inner flange of the bearing to be tested, the loading component includes an axial loading member, a radial loading member and an adjusting member, one end of the adjusting member is connected to the outer flange of the bearing to be tested, and the other end of the adjusting member is connected to the axial loading member and the radial loading member.

[0005] The advantages of adopting the above technical solution are: setting up the environmental component can simulate various extreme temperature conditions such as high temperature and low temperature that the wheel hub bearing may face in actual use. By simulating these complex temperature environments, the performance and durability of the bearing at different temperatures can be more comprehensively tested to ensure that the bearing can operate reliably in various actual environments. The box provides a relatively closed space, which can not only better control the temperature, but also reduce the interference of external environmental factors on the bearing test, and ensure the accuracy and reliability of the test results. With the setting of the loading component, the wheel hub bearing will be subjected to axial and radial loads at the same time. These complex load conditions can be accurately simulated through the axial loading part and the radial loading part, and the performance and durability of the bearing when subjected to different load combinations can be tested. The existence of the adjusting part makes the loading method and size more flexible and variable, and can be adjusted according to different test requirements, further improving the simulation ability of the test machine for complex load conditions. Through the mutual cooperation between the environmental component and the loading component, the complex operation requirements and environment of the wheel hub bearing in actual use can be more comprehensively simulated.

[0006] The present invention can be further configured as follows: the environmental component includes an air inlet duct and an air return duct, the high and low temperature adjustment box and the box body are separately arranged, the air inlet duct and the return air duct are flexibly arranged, the air inlet duct and the return air duct are respectively connected to the high and low temperature adjustment box and the box body, and an air inlet and a return air outlet are formed on the box body.

[0007] Through further settings, by separating the high and low temperature adjustment box from the box body, and utilizing the flexible settings of the air inlet and return ducts, the spatial layout of the two can be made more flexible. The designer of the flexible pipe fittings can then better adjust the layout of the equipment for easy installation and use.

[0008] The present invention can be further configured as follows: the air inlet and the return air outlet are vertically spaced apart and arranged above the box body, and an air guide plate is arranged between the air inlet duct and the return air duct, and the air guide plate starts from the space between the air inlet duct and the return air duct and extends to one side of the detection station.

[0009] Through further configuration, the presence of the air guide plate optimizes the air flow path in the box, effectively avoids the problem of air flow short circuit between the air inlet and the return air outlet, and can also effectively guide the air entering the box. The conditioned air can be guided to the inspection station to ensure that the bearing to be tested is in the temperature environment required for the inspection.

[0010] The present invention can be further configured as follows: the environmental component includes a plurality of water spray holes for supplying mud and salt water into the box body, and the plurality of water spray holes are arranged on the side wall of the box body along the circumference of the detection station.

[0011] Through further settings, during actual vehicle driving, wheel hub bearings will face various complex road conditions, including muddy and water splashing, etc. By setting up a number of water spray holes for muddy and salty water to enter the box, it is possible to simulate the scene where the wheel hub bearing is exposed to muddy and salty water during actual driving, making the detection of wheel hub bearings closer to the actual use environment, thereby more accurately evaluating the durability and reliability of wheel hub bearings under harsh conditions.

[0012] The present invention may be further configured as follows: the environmental component includes a water baffle, and the water baffle is arranged between the return air outlet and the detection station.

[0013] Through further settings, when conducting mud and salt water testing, the mud and salt water may splash around the testing station for various reasons. The presence of the water baffle can intercept the mud and salt water so that it cannot directly enter the return air outlet, thereby effectively preventing the return air outlet from being blocked or contaminated by the mud and salt water, thereby ensuring the stability and reliability of the entire environmental components and testing equipment.

[0014] The present invention may be further configured as follows: a plurality of through grooves and water retaining sheets are provided on the water retaining plate; the water retaining sheets are provided at one side of the through groove in the width direction and extend obliquely toward the other side of the through groove.

[0015] Through further configuration, the grooves and water retaining plates can ensure that the airflow enters the return air outlet smoothly while intercepting muddy and salty water, thereby ensuring the stability and reliability of the entire environmental components and detection equipment.

[0016] The present invention can be further configured as follows: the detection component includes a double-row tapered roller bearing and a double-row spherical roller bearing, and the double-row tapered roller bearing and the double-row spherical roller bearing are respectively mounted on both ends of the main shaft.

[0017] Through further configuration, the double-row tapered roller bearing bears the bidirectional axial force of the hub bearing, and the double-row tapered stick bearing bears the radial force of the hub bearing, and has good self-aligning function to ensure the smooth operation of the main shaft.

[0018] The present invention can be further configured as follows: the loading assembly includes a mounting block, one end of the adjusting member is connected to the bearing to be tested via the mounting block, and the adjusting member can be vertically slidably arranged along the mounting block.

[0019] Through further configuration, a mounting block is used to form a connection with the bearing to be tested, and the adjusting member is allowed to slide vertically along the mounting block, so that the distance between the testing station and the loading point can be easily adjusted, thereby better simulating the operation of the bearing when used on tires with different radius specifications.

[0020] The present invention may be further configured as follows: the lower end of the adjusting member is bent to form a bent portion, and the bent portion is extended toward the bottom of the detection station.

[0021] Through further configuration, a bending portion is provided below the adjustment so that the bending portion extends toward the bottom of the detection station, thereby better simulating the stress condition of the wheel hub bearing when the tire contacts the ground.

[0022] The present invention can be further configured as follows: the bending portion is provided with a long groove extending in a corresponding length direction thereof, a sliding block is provided in the long groove, and the output ends of the axial loading member and the radial loading member are connected to the sliding block.

[0023] Through further settings, through the setting of the sliding block, the axial movement of the tire contact point under actual working conditions can be simulated, avoiding the interference between the radial loading force and the axial force, and ensuring that the axial force and radial force can be accurately applied to the wheel hub bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure of the embodiment of the present invention is shown in FIG. Figure 1 ; Figure 2 The structure of the embodiment of the present invention is shown in FIG. Figure 2 ; Figure 3 For the embodiment of the present invention Figure 2 Sectional view at AA in the middle; Figure 4 For the embodiment of the present invention Figure 3 Enlarged view of part a; Figure 5 For the embodiment of the present invention Figure 3 Enlarged view of part b; Figure 6 It is a structural schematic diagram of a detection station in an embodiment of the present invention; Figure 7 A schematic diagram of the structure of a water retaining plate in an embodiment of the present invention; Figure 8 For the embodiment of the present invention Figure 3 Enlarged view of part c; Fig. 9 For the embodiment of the present invention Figure 3 Enlarged view of part d; Among them: environmental component 1; box body 11; air inlet 111; return air outlet 112; high and low temperature adjustment box 12; detection station 13; air inlet duct 14; return air duct 15; air guide plate 16; water spray hole 17; water baffle 18; through groove 181; water baffle 182; loading component 2; axial loading part 21; radial loading part 22; adjusting part 23; mounting block 24; bending part 25; sliding block 26; detection component 3; main shaft 31; double-row tapered roller bearing 32; double-row spherical roller bearing 33; bearing to be tested 4; axial loading airbag 5; radial loading airbag 6. DETAILED DESCRIPTION

[0025] The embodiment of the wheel hub bearing durability testing machine of the present invention is as follows: Figure 1-9 As shown: it includes an environmental component 1, a loading component 2 and a detection component 3, the environmental component 1 includes a box 11 and a high and low temperature adjustment box 12, the box 11 is provided with a detection station 13 for installing the bearing to be tested, the high and low temperature adjustment box 12 is used to adjust the temperature in the box 11, the detection component 3 includes a main shaft 31, one end of the main shaft 31 extends into the detection station 13 in the box 11 and can be connected to the inner flange of the bearing to be tested 4, the loading component 2 includes an axial loading part 21, a radial loading part 22 and an adjusting part 23, one end of the adjusting part 23 is connected to the outer flange of the bearing to be tested, and the other end of the adjusting part 23 is connected to the axial loading part 21 and the radial loading part 22.

[0026] The environmental component 1 includes an air inlet duct 14 and an air return duct 15. The high and low temperature adjustment box 12 and the box body 11 are separately arranged. The air inlet duct 14 and the air return duct 15 are flexibly arranged. The air inlet duct 14 and the air return duct 15 are respectively connected to the high and low temperature adjustment box 12 and the box body 11, and an air inlet port 111 and an air return port 112 are formed on the box body 11.

[0027] The air inlet 111 and the return air outlet 112 are vertically spaced apart at the top of the box body 11 , and an air guide plate 16 is provided between the air inlet duct 14 and the return air duct 15 . The air guide plate 16 starts from the space between the air inlet duct 14 and the return air duct 15 and extends to one side of the detection station 13 .

[0028] The environmental component 1 includes a plurality of water spray holes 17 for supplying mud and salt water into the box body. The plurality of water spray holes 17 are arranged on the side wall of the box body 11 along the circumference of the detection station 13 .

[0029] The environmental component 1 includes a water baffle 18 , and the water baffle 18 is arranged between the return air port 112 and the detection station 13 .

[0030] The water retaining plate 18 is provided with a plurality of through grooves 181 and water retaining sheets 182 . The water retaining sheets 182 are provided at one side of the through groove 181 in the width direction and extend obliquely toward the other side of the through groove 181 .

[0031] The detection assembly 3 includes a double-row tapered roller bearing 32 and a double-row spherical roller bearing 33 , and the double-row tapered roller bearing 32 and the double-row spherical roller bearing 33 are respectively mounted on both ends of the main shaft 31 .

[0032] The loading assembly 2 includes a mounting block 24 , one end of the adjusting member 23 is connected to the bearing 4 to be tested via the mounting block 24 , and the adjusting member 23 can be vertically slidably arranged along the mounting block 24 .

[0033] The lower end of the adjusting member 23 is bent to form a bent portion 25 , and the bent portion 25 is extended downward toward the detection station 13 .

[0034] The bending portion 25 is provided with a long groove 251 extending in the length direction thereof. A sliding block 26 is provided in the long groove 251 . The output ends of the axial loading member 21 and the radial loading member 22 are connected to the sliding block 26 .

[0035] In this embodiment, two axial loading airbags 5 are used for axial loading to meet the axial bidirectional loading requirements of the bearing 4 to be tested. Compressed air enters the axial loading airbag 5, and an axial force is applied to the bearing 4 to be tested through the axial loading member 21 to ensure the accuracy of loading. The axial loading airbag 5 has good correction and buffering properties. The expanded axial loading airbag 5 can be loaded quickly, and the adjustment member 23 is used to match the positions of different tooling; radial loading uses a radial loading airbag 6 for loading to simulate the radial force of the frame on the wheel hub bearing. The radial loading airbag 6 is fixed on the sliding block 26, and the sliding block 26 slides on the long groove 251 of the bending portion 25, so that the radial loading structure can move on the bending portion 25 as a whole. When an axial load is applied to the bearing 4 to be tested, the loading point will move axially (the same phenomenon will also occur at the tire contact point under actual working conditions), and the radial loading structure can follow the sliding block 26 on the bending portion 25 to avoid interference between the radial loading force and the axial force, and ensure that the axial force and the radial force can be accurately applied to the bearing 4 to be tested.

[0036] The above example is only one preferred specific example of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A wheel hub bearing durability testing machine, characterized in that: It includes an environmental component, a loading component and a detection component. The environmental component includes a box and a high and low temperature adjustment box. The box is provided with a detection station for installing the bearing to be tested. The high and low temperature adjustment box is used to adjust the temperature in the box. The detection component includes a main shaft. One end of the main shaft extends into the detection station in the box and can be connected to the inner flange of the bearing to be tested. The loading component includes an axial loading part, a radial loading part and an adjusting part. One end of the adjusting part is connected to the outer flange of the bearing to be tested, and the other end of the adjusting part is connected to the axial loading part and the radial loading part.

2. The wheel hub bearing durability testing machine according to claim 1, characterized in that: The environmental component includes an air inlet duct and an air return duct. The high and low temperature adjustment box is separately arranged from the box body. The air inlet duct and the air return duct are flexibly arranged. The air inlet duct and the air return duct are respectively connected to the high and low temperature adjustment box and the box body, and an air inlet and an air return port are formed on the box body.

3. The wheel hub bearing durability testing machine according to claim 2, characterized in that: The air inlet and the return air outlet are arranged vertically at a distance from each other at the top of the box body, and an air guide plate is arranged between the air inlet duct and the return air duct. The air guide plate starts from the distance between the air inlet duct and the return air duct and extends to one side of the detection station.

4. The wheel hub bearing durability testing machine according to claim 1, 2 or 3, characterized in that: The environmental component comprises a plurality of water spray holes for supplying mud and salt water into the box body, and the plurality of water spray holes are arranged on the side wall of the box body along the circumference of the detection station.

5. The wheel hub bearing durability testing machine according to claim 4, characterized in that: The environmental component comprises a water baffle, and the water baffle is arranged between the return air outlet and the detection station.

6. The wheel hub bearing durability testing machine according to claim 5, characterized in that: The water retaining plate is provided with a plurality of through grooves and water retaining sheets. The water retaining sheet is arranged at one side of the through groove in the width direction and extends obliquely toward the other side of the through groove.

7. The wheel hub bearing durability testing machine according to claim 1, 2, 3, 5 or 6, characterized in that: The detection component comprises a double-row tapered roller bearing and a double-row spherical roller bearing, and the double-row tapered roller bearing and the double-row spherical roller bearing are respectively sleeved at both ends of the main shaft.

8. The wheel hub bearing durability testing machine according to claim 1, 2, 3, 5 or 6, characterized in that: The loading assembly comprises a mounting block, one end of the adjusting member is connected to the bearing to be tested via the mounting block, and the adjusting member can be vertically slidably arranged along the mounting block.

9. The wheel hub bearing durability testing machine according to claim 8, characterized in that: The lower end of the adjusting member is bent to form a bent portion, and the bent portion is extended toward the bottom of the detection station.

10. The wheel hub bearing durability testing machine according to claim 9, characterized in that: The bending portion is provided with a long groove extending in a corresponding length direction thereof, a sliding block is provided in the long groove, and the output ends of the axial loading member and the radial loading member are connected to the sliding block.

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