Testing device for mud immersion of hub bearing

Abstract

The utility model relates to wheel hub bearing immersion detection, and discloses a wheel hub bearing mud immersion test device, which comprises a driver, a loading arm and a first mud water pipe, an inner connecting disc is arranged on a main shaft of the driver, an outer connecting disc is arranged on the loading arm, a flange disc is arranged on the inner connecting disc, a water retaining frame is arranged between the inner connecting disc and the outer connecting disc, and the first mud water pipe is arranged on the water retaining frame. One side of the water retaining frame is in contact connection with the outer connecting disc, the other side of the water retaining frame wraps the outer side of the flange disc, a first gap is formed between the water retaining frame and the flange disc, and the water outlet area S2 of the first gap is smaller than the nozzle area S1 of the first muddy water pipe. The immersion state of the rotating end bearing sealing assembly is achieved through the flow difference of flowing-in and flowing-out of muddy water in the water retaining frame. Flange plates with different outer diameters are selected, and the size of the first gap is controlled, so that the immersion test is realized. The device can be repeatedly used, does not contact with a rotating flange, does not affect the rotating speed of a bench test, avoids immersion of a rotating main shaft of equipment, and does not have adverse effects on the test equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to wheel hub bearing immersion detection, especially wheel hub bearing mud immersion test device. BACKGROUND

[0002] As a key component of the automobile, the wheel hub bearing bears the important role of bearing and guiding the rotation of the wheel hub, and its performance directly affects the safety and reliability of the automobile. In actual application scenarios, the wheel hub bearing needs to face complex and harsh working conditions, especially in muddy and humid environments, and the sealing performance and wear resistance of the wheel hub bearing have a decisive influence on the service life of the bearing and the overall performance of the automobile.

[0003] At present, the market pays more and more attention to the sealing durability and wear resistance of the wheel hub bearing. In the prior art, the wheel hub bearing immersion test device disclosed in the patent with the announcement number CN106969881B can verify the wear resistance of the sealing material of the wheel hub bearing to a certain extent. The device sets up a vertical plate, a protective cover and other structures in the water tank to immerse the bearing center position in the mud water, and performs intermittent rotation test to examine the sealing durability. However, this traditional test device has certain limitations, for example, the flow and distribution of the mud water in the test process are not accurate enough, which may lead to that the test results are not comprehensive and accurate enough, and the force and mud water contact condition of the wheel hub bearing in the actual complex working condition cannot be completely simulated, so that the increasing demand for in-depth research on the performance of the wheel hub bearing cannot be met. UTILITY MODEL CONTENTS

[0004] The utility model provides wheel hub bearing mud immersion test device in view of the prior art shortcoming.

[0005] In order to solve the above technical problem, the utility model solves through the following technical scheme:

[0006] The wheel hub bearing mud immersion test device comprises a driver, a loading arm and a first mud water pipe, a inner connecting disc fixedly connected with the hub bearing spindle is installed on the main shaft of the driver, a outer connecting disc fixedly connected with the outer ring of the wheel hub bearing is installed on the loading arm,

[0007] A flange disc is installed on the inner connecting disc, a water baffle for immersing the bearing is installed between the inner connecting disc and the outer connecting disc, one side of the water baffle is in contact with the outer connecting disc, the other side of the water baffle is wrapped outside the flange disc, a first gap for the mud water to flow out is formed between the water baffle and the flange disc, and the water outlet area S2 of the first gap is smaller than the nozzle area S1 of the first mud water pipe.

[0008] The first gap formed by the water retaining frame and the flange plate, and the water outlet area S2 of the water retaining frame is smaller than the first slurry pipe nozzle area S1, can effectively control the slurry flow rate and flow, so that the slurry is more concentrated and stable to act on the hub bearing, and the precision of the test of the bearing sealing and wear resistance is improved.

[0009] The immersion state of the rotating end bearing sealing assembly is realized by the difference between the inflow and outflow of the slurry in the water retaining frame. By selecting different outer diameters of the flange plate, different widths of the first gap can be obtained, so as to control the outflow of the slurry to realize the immersion test. The device can be repeatedly used, does not contact the rotating flange, does not affect the test speed of the test stand, avoids the immersion of the rotating main shaft of the equipment, and does not adversely affect the test equipment.

[0010] As a preferred, the groove depth of the water retaining frame is h, the outer ring radius of the flange plate is r, h>r, and the top end face of the water retaining frame is higher than the horizontal plane where the central axis of the flange plate is located, or the top end face of the water retaining frame coincides with the horizontal plane where the central axis of the flange plate is located.

[0011] The groove depth h of the water retaining frame is greater than the outer ring radius r of the flange plate, which can make more slurry gather in the space formed by the water retaining frame and the flange plate, provide a more sufficient immersion environment for the hub bearing, ensure that all parts of the bearing can fully contact the slurry, and thus more comprehensively test the sealing performance and mud water erosion resistance of the bearing.

[0012] As a preferred, a second gap is provided between the water retaining frame and the inner connecting plate. The slurry flows through the first gap and the second gap in sequence, forming a more complex and continuous flushing path. In this process, the slurry produces multi-directional flushing effect on different parts of the hub bearing, which can more comprehensively and deeply simulate the mud erosion of the hub bearing under actual complex road conditions, and thus more accurately detect the weak link of the bearing sealing structure, and improve the accuracy of the test of the bearing sealing performance.

[0013] As a preferred, the side of the water retaining frame connected with the outer connecting plate is provided with an outer notch, and the other side of the water retaining frame close to the inner connecting plate is provided with an inner notch. The outer notch and the inner notch are both arc notches, the minimum depth of the outer notch to the groove bottom of the water retaining frame is b, and the minimum depth of the inner notch to the groove bottom of the water retaining frame is c, b

[0014] Since the inner notch needs to be close to the flange plate, a first gap is formed between them, and the width of the first gap cannot be too wide, otherwise it is easy to cause the outflow of the slurry to be greater than the inflow, thereby affecting the immersion effect. Therefore, the minimum depth of the inner notch is greater than the depth of the outer notch.

[0015] Preferably, a second mud and water pipe is also included, and a baffle plate is installed on the outside of the loading arm. The baffle plate, the loading arm, and the outer ring of the wheel hub bearing form a chamber for accommodating mud and water, and the nozzle of the second mud and water pipe faces the chamber.

[0016] The second mud and water pipe directly injects mud and water into the cavity formed by the baffle plate, loading arm, and outer ring of the wheel hub bearing. This allows the mud and water to act on the outer seal of the wheel hub bearing in a concentrated and continuous manner, accurately simulating the impact and soaking of the part by mud and water when the vehicle is running. This enables more accurate detection of the sealing performance of the seal, effectively identifying potential sealing defects and providing a reliable basis for the quality assessment of the seal.

[0017] Preferably, the central axis of the inner connecting plate coincides with the central axis of the outer connecting plate, and the top end face of the baffle plate is higher than the horizontal plane where the central axis of the outer connecting plate is located, or the top end face of the baffle plate coincides with the horizontal plane where the central axis of the outer connecting plate is located.

[0018] The alignment of the central axes of the inner and outer connecting plates ensures that the water baffle is positioned evenly and symmetrically around the wheel hub bearing, allowing the mud and water inside the baffle to evenly contact the seals at the inner end of the wheel hub bearing. Simultaneously, the top face of the water baffle is higher than or coincides with the horizontal plane of the central axis of the outer connecting plate, ensuring that the mud and water in the cavity formed by the water baffle, the loading arm, and the outer ring of the wheel hub bearing can immerse the outer seals of the wheel hub bearing, achieving complete and sufficient immersion of the seals at both ends of the wheel hub bearing, thus guaranteeing the integrity and effectiveness of the test.

[0019] This utility model, by adopting the above technical solution, has significant technical effects:

[0020] The first gap formed by the water baffle and the flange, and the outlet area S2 of the baffle being smaller than the nozzle area S1 of the first mud water pipe, can effectively control the outflow speed and flow rate of mud water, so that the mud water acts more concentratedly and stably on the wheel hub bearing, improving the accuracy of the mud water's effect on the bearing during the test, and making the test results more reflective of the actual sealing and wear resistance performance of the bearing.

[0021] The immersion state of the rotating bearing sealing assembly is achieved by the flow difference between the inflow and outflow of mud and water in the baffle. By selecting flanges of different outer diameters, different initial clearance widths can be obtained, thereby controlling the outflow of mud and water to achieve the immersion test. This device is reusable, does not contact the rotating flange, does not affect the test bench speed, and avoids immersion of the equipment's rotating spindle, thus having no adverse impact on the test equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the experimental setup.

[0023] Figure 2 This is a magnified view of part A.

[0024] Figure 3 is a structural diagram of a water baffle.

[0025] Figure 4 is a structural diagram of a hub bearing.

[0026] The names of the parts referred to by the respective reference numerals in the above figures are as follows:

[0027] 10 - driver

[0028] 11 - loading arm

[0029] 12 - first slurry pipe

[0030] 13 - inner connecting disc

[0031] 14 - outer connecting disc

[0032] 15 - flange disc

[0033] 16 - water baffle, 161 - outer notch, 162 - inner notch

[0034] 17 - second slurry pipe

[0035] 18 - baffle plate

[0036] 100 - first gap

[0037] 200 - second gap

[0038] 300 - chamber

[0039] 1 - hub bearing spindle

[0040] 2 - hub bearing outer ring

[0041] 3 - hub bearing inner sealing element

[0042] 4 - hub bearing outer sealing element DETAILED DESCRIPTION

[0043] The utility model will be described in further detail below in combination with the accompanying drawings. Figures 1-4 The utility model will be described in further detail below in combination with the accompanying drawings. Embodiment

[0044] The test device for hub bearing slurry immersion comprises a driver 10, a loading arm 11 and a first slurry pipe 12, the driver 10 is a motor in this embodiment, an inner connecting disc 13 fixedly connected with the hub bearing spindle 1 is installed on the main shaft of the driver 10, the main shaft of the driver 10 is fastened and connected with the inner connecting disc 13 through screws, an outer connecting disc 14 fixedly connected with the hub bearing outer ring 2 is installed on the loading arm 11, and another group of screws are fastened on the loading arm 11 after penetrating through the hub bearing outer ring 2.

[0045] The flange plate 15 is installed on the inner connecting plate 13, and is used to simulate a brake disc. The water baffle 16 for submerging the bearing is installed between the inner connecting plate 13 and the outer connecting plate 14. One side of the water baffle 16 is in contact with the outer connecting plate 14, and the other side of the water baffle 16 is wrapped outside the flange plate 15. The first gap 100 for discharging the mud water is formed between the water baffle 16 and the flange plate 15. Different widths of the first gap 100 are obtained by selecting different outer diameters of the flange plate 15. The water outlet area S2 of the first gap 100 is smaller than the nozzle area S1 of the first mud water pipe 12. The outflow of the mud water is controlled by adjusting the gap between the water baffle 16 and the selected flange plate 15. When the inflow of the mud water is greater than the outflow, the submerged end sealing assembly of the hub bearing is realized.

[0046] The groove depth of the water baffle 16 is h, the outer ring radius of the flange plate 15 is r, h>r, the top end face of the water baffle 16 is higher than the horizontal plane where the central axis of the flange plate 15 is located, or the top end face of the water baffle 16 coincides with the horizontal plane where the central axis of the flange plate 15 is located. At least half of the hub bearing is submerged in the mud water in the water baffle 16. When the hub bearing rotates, the seal on it can be submerged in the mud water. The sealing detection is more comprehensive, and the reliability of the submersion test is better.

[0047] The second gap 200 is provided between the water baffle 16 and the inner connecting plate 13. The second gap 200 is in communication with the first gap 100. The mud water in the water baffle 16 flows out through the first gap 100 and the second gap 200.

[0048] The side of the water baffle 16 connected with the outer connecting plate 14 is provided with an outer notch 161, and the other side of the water baffle 16 close to the inner connecting plate 13 is provided with an inner notch 162. The outer notch 161 and the inner notch 162 are both arc-shaped notches, and are both semicircles. The minimum depth of the outer notch 161 to the groove bottom of the water baffle 16 is b, and the minimum depth of the inner notch 162 to the groove bottom of the water baffle 16 is c, b

[0049] The test device further comprises a second mud water pipe 17. The water baffle plate 18 is installed on the outer side of the loading arm 11. The water baffle plate 18, the loading arm 11 and the hub bearing outer ring 2 form a cavity 300 for accommodating mud water. The nozzle of the second mud water pipe 17 is directed towards the cavity 300. The mud water in the cavity 300 can contact the hub bearing outer seal 4 at the hub bearing outer ring 2, so as to realize the submersion test of the hub bearing outer seal 4.

[0050] The middle axis of the inner connecting disc 13 coincides with the middle axis of the outer connecting disc 14, and the top end surface of the water baffle 18 is higher than the horizontal plane where the middle axis of the outer connecting disc 14 is located in the present embodiment, and in other embodiments, the top end surface of the water baffle 18 coincides with the horizontal plane where the middle axis of the outer connecting disc 14 is located. The top end surface of the water baffle 18 being higher than or coinciding with the horizontal plane where the middle axis of the outer connecting disc 14 is located can ensure that the mud and water in the cavity 300 formed by the water baffle 18 and the hub bearing outer ring 2 can be immersed into the hub bearing outer sealing element 4, thereby achieving full and sufficient immersion of the hub bearing sealing elements at both ends, ensuring the integrity and effectiveness of the test.

[0051] The working principle of the hub bearing mud immersion test device includes the following steps:

[0052] S1, the hub bearing is installed between the inner connecting disc 13 and the flange disc 15, the hub bearing outer ring 2 is fastened to the inner connecting disc 13, and the hub bearing shaft 1 is fastened to the flange disc 15 and the inner connecting disc 13 through screws;

[0053] S2, the water baffle frame 16 is fastened to the loading arm 11, and at least half of the hub bearing is immersed in the water baffle frame 16, and at least half of the hub bearing inner sealing element 3 is immersed in the water baffle frame 16;

[0054] S3, the water baffle 18 is installed on the loading arm 11, a cavity 300 is formed between the water baffle 18, the hub bearing outer ring 2 and the loading arm 11, the height of the water baffle 18 is not less than the center position of the hub bearing, and at least half of the hub bearing outer sealing element 4 is immersed in the cavity 300;

[0055] S4, the loading arm 11 applies axial force and radial force to the hub bearing, the input range of the axial force is 5KN, and the input range of the radial force is 1.5KN;

[0056] S5, the driver 10 is started, the driver 10 drives the inner connecting disc 13 to rotate, and the inner connecting disc 13 synchronously drives the hub bearing shaft 1 to rotate;

[0057] S6, the water pump is started, the first mud pipe 12 inputs mud water into the water baffle frame 16, and since the jet area of the first mud pipe 12 is larger than the water outlet area of the first gap 100, at least half of the hub bearing is immersed in the water baffle frame 16, and the second mud pipe 17 inputs mud water into the cavity 300;

[0058] S7, the test duration is 200h, and after the test, the hub bearing is taken down and disassembled to check whether water has entered.

[0059] Water outlet area The width of the first gap 100 is a, , d1 is the outer diameter of the other side port of the water baffle 16, d2 is the outer diameter of the flange plate 15, and the skilled in the art can calculate through the above formula. Embodiment

[0060] Embodiment 2 is basically the same as embodiment 1, except that in S4, the loading arm 11 applies axial force and radial force to the hub bearing, the input range value of the axial force is 10KN, and the input range value of the radial force is 3.25KN.

[0061] S7, the test duration is 350h, after the test, the hub bearing is taken down and disassembled, and whether water enters the hub bearing is checked. Embodiment

[0062] Embodiment 3 is basically the same as embodiment 1, except that in S4, the loading arm 11 applies axial force and radial force to the hub bearing, the input range value of the axial force is 15KN, and the input range value of the radial force is 5KN.

[0063] S7, the test duration is 500h, after the test, the hub bearing is taken down and disassembled, and whether water enters the hub bearing is checked.

Claims

1. A test device for hub bearing mud immersion, comprising a driver (10), a loading arm (11) and a first mud pipe (12), a inner connecting disc (13) fixed with a hub bearing spindle (1) is installed on a spindle of the driver (10), a outer connecting disc (14) fixed with a hub bearing outer ring (2) is installed on the loading arm (11), characterized in that: a flange disc (15) is installed on the inner connecting disc (13), a water baffle (16) for immersing the bearing is installed between the inner connecting disc (13) and the outer connecting disc (14), one side of the water baffle (16) is in contact with the outer connecting disc (14), the other side of the water baffle (16) is wrapped outside the flange disc (15), a first gap (100) for mud water outflow is formed between the water baffle (16) and the flange disc (15), an outlet area S2 of the first gap (100) is smaller than a nozzle area S1 of the first mud pipe (12). A groove depth of the water baffle (16) is h, a outer ring radius of the flange disc (15) is r, h>r, a top end surface of the water baffle (16) is higher than a horizontal plane where a central axis of the flange disc (15) is located, or the top end surface of the water baffle (16) is coincided with the horizontal plane where the central axis of the flange disc (15) is located.

2. A hub bearing slurry immersion test device according to claim 1, characterised in that: A second gap (200) is arranged between the water baffle (16) and the inner connecting disc (13).

3. The hub bearing mud-immersed test device of claim 1, wherein: An outer notch (161) is arranged on a side of the water baffle (16) connected with the outer connecting disc (14), an inner notch (162) is arranged on the other side of the water baffle (16) close to the inner connecting disc (13), the outer notch (161) and the inner notch (162) are both arc notches, a minimum depth of the outer notch (161) to a groove bottom of the water baffle (16) is b, a minimum depth of the inner notch (162) to the groove bottom of the water baffle (16) is c, b 4. The hub bearing mud-immersed test device of claim 1, wherein: A second mud pipe (17) is further included, a water baffle plate (18) is installed on an outer side of the loading arm (11), a cavity (300) for containing mud water is formed between the water baffle plate (18), the loading arm (11) and the hub bearing outer ring (2), a nozzle of the second mud pipe (17) is directed to the cavity (300).

5. The hub bearing mud-immersed test device of claim 1, wherein: A central axis of the inner connecting disc (13) is coincided with a central axis of the outer connecting disc (14), a top end surface of the water baffle plate (18) is higher than a horizontal plane where the central axis of the outer connecting disc (14) is located, or the top end surface of the water baffle plate (18) is coincided with the horizontal plane where the central axis of the outer connecting disc (14) is located.

6. A hub bearing slurry immersion test apparatus according to claim 5, characterised in that: ​

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