Sealing performance detection device of hub bearing unit

Abstract

The utility model provides a sealing detection device for a hub bearing unit, and particularly relates to the field of bearing manufacturing. The hub bearing unit comprises a first bearing, a second bearing and a first sealing device, and the first sealing device is connected with an inner ring of the first bearing and an inner ring of the second bearing in a sealing mode. The sealing performance detection device comprises a mounting rack, a half shaft and a sleeve, one end of the half shaft is fixedly connected with the mounting rack, a cantilever at the other end of the half shaft extends out, and the half shaft is provided with a mounting position for mounting a hub bearing unit; the sleeve is arranged on the outer side of the installation position in a sleeving mode, and a closed space at least capable of containing the first sealing device is defined by the sleeve, the inner ring of the first bearing and the inner ring of the second bearing. Wherein the half shaft is provided with an oil conveying channel, an oil outlet of the oil conveying channel corresponds to the first sealing device in position, the sleeve is provided with an observation hole, and the observation hole is communicated with the closed space. The detection device of the hub bearing unit is simple in structure, convenient to install and high in detection efficiency.

Description

Technical Field

[0001] The utility model relates to the field of bearing manufacturing, in particular to a sealing detection device for a wheel hub bearing unit. Background Art

[0002] The wheel hub bearing unit is developed on the basis of standard angular contact ball bearings and tapered roller bearings. It has the advantages of good assembly performance, no clearance adjustment, light weight, compact structure, and large load capacity. The wheel hub bearing unit combines two sets of bearings into an integrated structure. In order to reduce the mechanical wear of the wheel hub bearing itself, a lubricating medium will be applied to the wheel hub bearing. The lubricating medium is mainly released between the inner ring of the bearing and the outer ring of the bearing. In order to prevent the lubricating medium from overflowing into the motor and affecting the efficiency of the rotor or stator in the motor, the inner rings of the two sets of bearings are sealed and connected through a sealing device. The sealing device includes a connecting ring, a ferrule and an O-ring. The two inner rings are first fixed with a connecting ring, and then an O-ring and a ferrule are sequentially arranged at the connection of the two inner rings to seal the connection of the two inner rings. In order to ensure the normal operation of the wheel hub bearing unit, the sealing performance of the sealing device needs to be tested before installation. The conventional testing operation is complicated, and the bearing loading and unloading is cumbersome, and the testing efficiency is low. Utility Model Content

[0003] In view of the above shortcomings of the prior art, the utility model provides a sealing detection device for a hub bearing unit to improve the problem of low sealing test efficiency of the hub bearing unit.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a sealing detection device for a hub bearing unit. The hub bearing unit includes a first bearing, a second bearing and a first sealing device, the first sealing device sealingly connects the inner ring of the first bearing with the inner ring of the second bearing, the sealing detection device includes a mounting frame, a half shaft and a sleeve, one end of the half shaft is fixedly connected to the mounting frame, and the other end is cantilevered, and a mounting position for mounting the hub bearing unit is provided on the half shaft; the sleeve is sleeved on the outside of the mounting position, and a closed space that can at least accommodate the first sealing device is formed between the inner ring of the first bearing and the inner ring of the second bearing; wherein an oil delivery channel is provided on the half shaft, and the oil outlet of the oil delivery channel corresponds to the position of the first sealing device, and an observation hole is provided on the sleeve, and the observation hole is connected to the closed space.

[0005] In an example of the present invention, the wheel hub bearing unit also includes a second sealing device and a third sealing device, the second sealing device is sleeved on the inner ring of the first bearing, the third sealing device is sleeved on the inner ring of the second bearing, one end of the sleeve is sealed and connected to the inner ring of the first bearing through the second sealing device, and the other end of the sleeve is sealed and connected to the inner ring of the second bearing through the third sealing device.

[0006] In one example of the utility model, the second sealing device and the third sealing device both include a metal frame and a rubber layer arranged on the metal frame, the rubber layer of the second sealing device has an interference fit with the inner wall of one end of the sleeve, and the rubber layer of the third sealing device has an interference fit with the inner wall of the other end of the sleeve.

[0007] In an example of the present invention, a protrusion is provided on one side of the semi-shaft close to the third sealing device, the protrusion is circumferentially arranged along the central axis of the semi-shaft, and the protrusion abuts against the third sealing device.

[0008] In an example of the present invention, the oil inlet of the oil delivery channel is arranged on the protrusion.

[0009] In an example of the present invention, the oil inlet of the oil delivery channel is connected to the pressurizing device.

[0010] In an example of the present invention, the detection device further includes a fixing plate, the half-shaft is fixedly connected to the fixing plate, and the fixing plate is detachably connected to the mounting frame.

[0011] In an example of the present invention, a thread is provided at one end of the half-shaft away from the mounting frame, and the half-shaft is fixedly connected to the wheel hub bearing unit via a nut matching the thread.

[0012] In an example of the present invention, a groove is further provided on the half shaft, the groove is communicated with the oil outlet of the oil delivery channel, and the groove is distributed along the circumferential direction of the half shaft.

[0013] In an example of the present invention, a fixing portion that matches with the outer ring of the first bearing and the outer ring of the second bearing is provided on the inner wall of the sleeve, and the fixing portion is distributed circumferentially along the central axis of the sleeve.

[0014] The sealing detection device of the wheel hub bearing unit of the utility model has a mounting position for mounting the wheel hub bearing unit on the half shaft, a sleeve is sleeved on the outside of the mounting position, and a closed space that can at least accommodate the first sealing device is formed between the sleeve and the inner ring of the first bearing and the inner ring of the second bearing. During the test, the liquid oil is transported to the oil outlet corresponding to the position of the first sealing device through the oil pipeline on the half shaft, and the grease state of the first sealing device is observed through the observation hole on the sleeve. The detection device in the present application has a simple structure, is easy to install, and has high detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the cooperation between the wheel hub bearing unit and the sealing detection device of the wheel hub bearing unit in one embodiment of the utility model.

[0017] Component number description

[0018] 100, mounting frame; 200, wheel hub bearing unit; 210, first bearing; 220, second bearing; 230, first sealing device; 240, second sealing device; 250, third sealing device; 300, half shaft; 310, oil delivery channel; 320, protrusion; 330, groove; 400, sleeve; 410, observation hole; 420, fixing part; 500, fixing plate; 600, nut. DETAILED DESCRIPTION

[0019] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0020] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

[0021] The wheel hub bearing unit includes a first bearing, a second bearing and a first sealing device. The first bearing and the second bearing are coaxially arranged. The inner ring of the first bearing and the inner ring of the second bearing are arranged oppositely. The lubricating medium is filled between the first bearing and the second bearing. In order to prevent the lubricating medium from overflowing into the interior of the motor and affecting the use, the inner ring of the first bearing and the inner ring of the second bearing are sealed and connected by the first sealing device. In order to detect the sealing effect of the first sealing device on the inner ring of the first bearing and the inner ring of the second bearing, the present application provides a sealing detection device for the wheel hub bearing unit.

[0022] See also Figure 1 The sealing detection device of the hub bearing unit includes a mounting frame 100, a half shaft 300 and a sleeve 400.

[0023] The present application does not limit the structure of the mounting frame 100. The mounting frame 100 can be any frame structure that provides a fixed support for the half-axle 300, such as a cylinder, a cuboid, or a frame structure. In one embodiment, the mounting frame 100 is in the shape of a cuboid.

[0024] One end of the half shaft 300 is fixedly connected to the mounting frame 100, and the other end is cantilevered. The half shaft 300 is provided with a mounting position for mounting the hub bearing unit 200. The size of the half shaft 300 is not limited here, and it is adjusted according to the size of the hub bearing unit 200. The half shaft 300 and the mounting frame 100 can be fixedly connected in any way, such as welding or connecting by fasteners. In one embodiment, the detection device also includes a fixing plate 500, and the fixing plate 500 is provided with a groove matching the half shaft 300. The half shaft 300 is located in the groove of the fixing plate 500, which is convenient for fixing the half shaft 300 on the mounting frame 100. The half shaft 300 is fixedly connected to the fixing plate 500, and the fixing plate 500 is detachably connected to the mounting frame 100, which is convenient for replacing the half shaft 300 and meeting the detection requirements of the hub bearing units 200 of different sizes. The connection method of the half shaft 300 and the fixing plate 500 includes but is not limited to welding. Here, the half shaft 300 is used to simulate the installation of the hub bearing unit 200 in actual working conditions. In other embodiments, the half shaft 300 may also be any other cylindrical structure that meets the use requirements.

[0025] The sleeve 400 is sleeved on the outside of the installation position, and a closed space is formed between the inner ring of the first bearing 210 and the inner ring of the second bearing 220 to at least accommodate the first sealing device 230. The inner diameter of the sleeve 400 matches the outer diameter of the hub bearing unit 200. In one embodiment, a fixing portion 420 matching the outer ring of the first bearing 210 and the outer ring of the second bearing 220 is provided on the inner wall of the sleeve 400, and the fixing portion 420 is distributed circumferentially along the central axis of the sleeve 400 to prevent the outer rings of the first bearing 210 and the second bearing 220 from being offset and affecting the test results.

[0026] The half shaft 300 is provided with an oil delivery channel 310, which includes a first channel and a second channel. The first channel is provided along the radial direction of the half shaft 300, and the second channel is provided along the axial direction of the half shaft 300. The first channel is connected to the second channel. The first channel is connected to the oil inlet of the oil delivery channel 310, and the second channel is connected to the oil outlet of the oil delivery channel 310. The oil outlet of the oil delivery channel 310 corresponds to the position of the first sealing device 230. During the test, the liquid oil is transported to the first sealing device 230 through the oil delivery channel 310 and flows out from the oil outlet of the oil delivery channel 310. The sleeve 400 is provided with an observation hole 410, which is connected to the enclosed space. The sealing effect of the first sealing device 230 can be observed through the observation hole 410 on the sleeve 400. If no liquid oil flows out of the first sealing device 230, it means that the sealing effect of the first sealing device 230 is good.

[0027] See also Figure 1 In one embodiment, the hub bearing unit 200 further includes a second sealing device 240 and a third sealing device 250. The second sealing device 240 is sleeved on the inner ring of the first bearing 210, and the third sealing device 250 is sleeved on the inner ring of the second bearing 220. One end of the sleeve 400 is sealed and connected to the inner ring of the first bearing 210 through the second sealing device 240, and the other end of the sleeve 400 is sealed and connected to the inner ring of the second bearing 220 through the third sealing device 250. The second sealing device 240 and the third sealing device 250 both include a metal frame and a rubber layer arranged on the metal frame. The rubber layer of the second sealing device 240 is interference fit with the inner wall of one end of the sleeve 400, and the rubber layer of the third sealing device 250 is interference fit with the inner wall of the other end of the sleeve 400.

[0028] Before testing the sealing performance of the first sealing device 230, it is necessary to first test the sealing performance of the second sealing device 240 and the third sealing device 250. Specifically, after the hub bearing unit 200 and the testing device are assembled, grease is injected into the hub bearing unit 200, and the sealing performance of the second sealing device 240 and the third sealing device 250 is tested by observing the grease conditions at the second sealing device 240 and the third sealing device 250. If there is no grease leakage outside the second sealing device 240 and the third sealing device 250, it means that the sealing performance of the second sealing device 240 and the third sealing device 250 is good.

[0029] See also Figure 1, the half shaft 300 passes through the hub bearing unit 200 and is fixedly connected thereto. In one embodiment, a thread is provided at one end of the half shaft 300 away from the mounting frame 100, and the half shaft 300 is fixedly connected to the hub bearing unit 200 through a nut 600 matching the thread. A protrusion 320 is provided on the side of the half shaft 300 close to the third sealing device 250, and the protrusion 320 is arranged circumferentially along the central axis of the half shaft 300. During the test, the protrusion 320 and the nut 600 are respectively abutted against the two ends of the hub bearing unit 200 to prevent the half shaft 300 from shaking during the test. Exemplarily, the oil inlet of the oil delivery channel 310 is arranged on the protrusion 320. A groove 330 is also provided on the half shaft 300, and the groove 330 is connected to the oil outlet of the oil delivery channel 310, and the groove 330 is distributed circumferentially along the half shaft 300. The width and depth of the groove 330 are not limited here, and are adjusted according to actual needs. Preferably, the oil inlet of the oil delivery channel 310 is connected to the pressurizing device to test the sealing effect of the first sealing device 230 under different pressures, so as to simulate the sealing performance of the hub bearing unit 200 under different working conditions.

[0030] The sealing detection device of the wheel hub bearing unit of the utility model has a mounting position for mounting the wheel hub bearing unit on the half shaft, a sleeve is sleeved on the outside of the mounting position, and a closed space capable of accommodating at least the first sealing device is enclosed between the sleeve and the inner ring of the first bearing and the inner ring of the second bearing. During the test, the liquid oil is transported to the oil outlet corresponding to the position of the first sealing device through the oil pipeline on the half shaft, and the grease state of the first sealing device is observed through the observation hole on the sleeve. The detection device of the present application has a simple structure, is easy to install, and has a high detection efficiency. Therefore, the utility model effectively overcomes some practical problems in the prior art and has a high utilization value and use significance.

[0031] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A sealing detection device for a hub bearing unit, the hub bearing unit comprising a first bearing, a second bearing and a first sealing device, the first sealing device sealingly connecting the inner ring of the first bearing with the inner ring of the second bearing, characterized in that: The sealing detection device comprises: Mounting frame; A half shaft, one end of which is fixedly connected to the mounting frame and the other end of which is cantilevered out, and a mounting position for mounting a hub bearing unit is provided on the half shaft; A sleeve, which is sleeved on the outer side of the installation position and forms a closed space between the inner ring of the first bearing and the inner ring of the second bearing to at least accommodate the first sealing device; Wherein, an oil delivery channel is arranged on the half shaft, an oil outlet of the oil delivery channel corresponds to the position of the first sealing device, and an observation hole is arranged on the sleeve, and the observation hole is communicated with the enclosed space.

2. The sealing detection device of the hub bearing unit according to claim 1, characterized in that: The wheel hub bearing unit also includes a second sealing device and a third sealing device, the second sealing device is sleeved on the inner ring of the first bearing, the third sealing device is sleeved on the inner ring of the second bearing, one end of the sleeve is sealed and connected to the inner ring of the first bearing through the second sealing device, and the other end of the sleeve is sealed and connected to the inner ring of the second bearing through the third sealing device.

3. The sealing detection device of the hub bearing unit according to claim 2, characterized in that: The second sealing device and the third sealing device both include a metal frame and a rubber layer arranged on the metal frame, the rubber layer of the second sealing device has an interference fit with the inner wall of one end of the sleeve, and the rubber layer of the third sealing device has an interference fit with the inner wall of the other end of the sleeve.

4. The sealing detection device for a hub bearing unit according to claim 2, characterized in that: A protrusion is arranged on one side of the semi-shaft close to the third sealing device. The protrusion is arranged circumferentially along the central axis of the semi-shaft, and the protrusion abuts against the third sealing device.

5. The sealing detection device of the hub bearing unit according to claim 4, characterized in that: The oil inlet of the oil delivery channel is arranged on the protrusion.

6. The sealing detection device for a hub bearing unit according to claim 5, characterized in that: The oil inlet of the oil delivery channel is connected to the pressurizing device.

7. The sealing detection device of the hub bearing unit according to claim 1, characterized in that: The detection device also includes a fixing plate, the half-shaft is fixedly connected to the fixing plate, and the fixing plate is detachably connected to the mounting frame.

8. The sealing detection device of the hub bearing unit according to claim 1, characterized in that: A thread is arranged at one end of the half shaft away from the mounting frame, and the half shaft is fixedly connected to the hub bearing unit via a nut matching the thread.

9. The sealing detection device of the hub bearing unit according to claim 1, characterized in that: The half shaft is also provided with a groove, the groove is communicated with the oil outlet of the oil delivery channel, and the groove is distributed along the circumference of the half shaft.

10. The sealing detection device of the hub bearing unit according to claim 1, characterized in that: The inner wall of the sleeve is provided with a fixing portion matched with the outer ring of the first bearing and the outer ring of the second bearing, and the fixing portion is distributed circumferentially along the central axis of the sleeve.

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