Bearing sealing performance detection device

Abstract

The utility model provides a bearing sealing performance detection device. The bearing sealing performance detection device comprises a workbench and a tool assembly. The tool assembly is arranged on the workbench and is used for placing a bearing to be tested, and the tool assembly is provided with an air duct which can be communicated with an external air source; the tool assembly can be in sealing contact with the two end faces of the to-be-tested bearing, an inner cavity sealed by a framework oil seal of the to-be-tested bearing can only communicate with the air duct, and the outer side of the framework oil seal of the to-be-tested bearing is located in the external environment. Thus, an internal cavity sealed by a framework oil seal of the to-be-measured bearing is only communicated with the air passage by using the tool assembly, then after an external air source introduces a rated amount of air into the air passage, the internal cavity of the bearing forms an under-pressure environment, the air pressure is measured and compared with the air pressure of a bearing standard component, and if the pressure difference value is within an allowable range, the bearing is qualified. And if the pressure difference value is too large, the gas leakage is serious, and the sealing performance does not reach the standard, so that the problem of how to detect the sealing performance of the bearing for the harmonic reducer before installation and use in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of bearing testing, and in particular to a bearing sealing detection device. Background Art

[0002] At present, in some types of bearings, such as the cross roller bearings commonly used in harmonic reducers, there are usually skeleton oil seals in the bearings to play a sealing role. The skeleton oil seals are sealed between the inner and outer rings of the bearings and sealed on the outside of the roller assembly. For the harmonic reducer, it plays a supporting and sealing role. When the skeleton oil seal is not tight enough, oil seepage and leakage will occur when it is installed in the harmonic reducer, which will cause the inside of the harmonic reducer to be unable to be lubricated normally, thereby accelerating the wear of the bearings, resulting in reduced accuracy of the harmonic reducer and a significant shortening of its life. Therefore, it is necessary to test the sealing of the bearings before installing and using the bearings. Utility Model Content

[0003] In view of this, the present application provides a bearing sealing detection device to solve the problem of how to perform sealing detection on bearings used in harmonic reducers before installation and use in the prior art.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A bearing sealing detection device, comprising:

[0006] Workbench;

[0007] A tooling assembly is arranged on the workbench and is used to place the bearing to be tested, and the tooling assembly is provided with an air passage that can be connected to an external air source;

[0008] The tooling assembly can be in sealing contact with both end surfaces of the bearing to be tested, and the internal cavity sealed by the skeleton oil seal of the bearing to be tested can only be connected to the air passage, and the outer side of the skeleton oil seal of the bearing to be tested is located in the external environment.

[0009] Optionally, the tooling assembly includes:

[0010] A first pressing plate, connected to the workbench and provided with a bearing placement groove, wherein the first pressing plate is provided with the air passage;

[0011] A second pressing plate, capable of moving to a position opposite to the first pressing plate along a first direction;

[0012] Among them, when the bearing to be tested is located in the bearing placement groove, the first pressure plate can be in sealing contact with the outer ring end face of the bearing to be tested, and the second pressure plate can be in sealing contact with the inner ring end face of the bearing to be tested, and a gap is formed between the inner ring of the bearing to be tested and the first pressure plate, and the gap connects the internal cavity of the bearing to be tested and the air duct.

[0013] Optionally, a first sealing ring is provided in the bearing placement groove, and the first sealing ring can be in compression contact with the outer ring end face of the bearing to be tested;

[0014] A second sealing ring is disposed on a surface of the second pressing plate facing the first pressing plate, and the second sealing ring can be in compression contact with the inner ring end surface of the bearing to be tested.

[0015] Optionally, a boss is provided in the bearing placement groove, and the boss can extend into the inner ring of the bearing to be tested.

[0016] Optionally, it also includes a power mechanism arranged on the workbench, and the power mechanism can drive the second pressing plate to reciprocate along the first direction and can apply pressure to the second pressing plate.

[0017] Optionally, the workbench includes:

[0018] A base, connected to the first pressing plate;

[0019] A top seat, located above the base and equipped with the power mechanism;

[0020] A column supported between the base and the top seat along the first direction;

[0021] Wherein, the second pressing plate is located in the space between the base and the top seat.

[0022] Optionally, the workbench further comprises a slide located between the base and the top seat, and the slide is slidably connected to the column;

[0023] The second pressing plate is connected to the bottom surface of the slide, and the power mechanism can drive the slide to slide along the column.

[0024] Optionally, the workbench further comprises a first tooling mounting plate disposed on the base, and the first pressing plate is detachably connected to the first tooling mounting plate;

[0025] The first tooling installation plate is provided with a main airway and an air interface connected to the main airway, the main airway is sealed and butted with the airway, and the air interface is used for plugging in an external air source;

[0026] A second tooling mounting plate is disposed on the bottom surface of the slide, and the second pressing plate is detachably connected to the second tooling mounting plate.

[0027] Optionally, the first pressing plate has several specifications with different sizes;

[0028] And / or, the second pressing plate has several specifications with different sizes.

[0029] Optionally, the power mechanism includes a cylinder and a connecting seat, the cylinder body of the cylinder is connected to the top seat, the connecting seat is connected to the slide, and the piston rod of the cylinder is connected to the connecting seat.

[0030] The bearing sealing detection device provided in the present application includes a workbench and a tooling assembly; the tooling assembly is arranged on the workbench and is provided with a ventilation passage that can be connected to an external air source; wherein the tooling assembly can be in sealing contact with the two end surfaces of the bearing to be tested, and the internal cavity sealed by the skeleton oil seal of the bearing to be tested can only be connected to the ventilation passage, and the outer side of the skeleton oil seal of the bearing to be tested is located in the external environment. With such arrangement, since the sealing performance of the skeleton oil seal is reflected in preventing the oil in the internal cavity from leaking to the outside, the internal cavity of the bearing to be tested forms a closed space, and the closed space is filled with gas and the air pressure is detected to provide feedback on the sealing performance of the skeleton oil seal. The tooling assembly is used to make the internal cavity sealed by the skeleton oil seal of the bearing to be tested only connected to the air duct, and then after the external air source introduces a rated amount of gas into the air duct, a pressurized environment is formed in the internal cavity of the bearing to be tested. After a set pressure holding time, the air pressure is measured and compared with the air pressure of the bearing standard part. If the pressure difference is within the allowable range, it is qualified. If the pressure difference is too large, it means that the gas leakage is serious and the sealing performance is substandard. This solves the problem of how to perform sealing detection on bearings used for harmonic reducers before installation and use in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application 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 embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0032] Figure 1 A structural diagram of the bearing sealing detection device provided in an embodiment of the present application when in a standby state;

[0033] Figure 2 A structural diagram of the bearing sealing detection device provided in an embodiment of the present application when in a working state;

[0034] Figure 3 A cross-sectional view of the bearing sealing detection device provided in an embodiment of the present application when in a working state;

[0035] Figure 4 A schematic diagram of the air filling space of the bearing sealing detection device provided in an embodiment of the present application;

[0036] Figure 5 A schematic diagram of the structure of a workbench provided in an embodiment of the present application;

[0037] Figure 6 A bearing sealing detection device adapted to other types of bearings to be tested is provided in an embodiment of the present application.

[0038] exist Figure 1-Figure 6 middle:

[0039] 100, outer ring; 200, inner ring; 300, bearing to be tested;

[0040] 1. Tooling assembly; 2. Base; 3. Top seat; 4. Column; 5. Slide; 6. First tooling mounting plate; 7. Second tooling mounting plate; 8. Cylinder; 9. Connecting seat;

[0041] 11. first pressing plate; 12. second pressing plate; 13. gap;

[0042] 101, air passage; 102, bearing placement groove; 103, first sealing ring; 104, second sealing ring; 105, boss;

[0043] 601, main air channel; 602, air interface; 603, third sealing ring. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] like Figure 1-Figure 5 As shown, an embodiment of the present application provides a bearing sealing detection device, which is suitable for detecting the sealing of the skeleton oil seal of a roller bearing, such as a cross roller bearing, and the bearing sealing detection device includes a workbench and a tooling assembly 1; the tooling assembly 1 is arranged on the workbench and is provided for the bearing 300 to be tested to be placed, and the tooling assembly 1 is provided with an air passage 101 that can be connected to an external air source; wherein, the tooling assembly 1 can be in sealing contact with both end faces of the bearing 300 to be tested, and the internal cavity sealed by the skeleton oil seal of the bearing 300 to be tested can only be connected to the air passage 101, and the outer side of the skeleton oil seal of the bearing 300 to be tested is located in the external environment. Based on the installation position of the skeleton oil seal in the bearing, the internal cavity sealed by the skeleton oil seal is the cavity where the roller assembly is located.

[0046] In such a configuration, since the sealing performance of the skeleton oil seal is reflected in preventing the oil in the sealed internal cavity from leaking to the outside, the internal cavity of the bearing 300 to be tested is formed into a closed space, and the closed space is filled with gas and the air pressure is detected to feedback the sealing performance of the skeleton oil seal. The tooling assembly 1 is used to make the internal cavity sealed by the skeleton oil seal of the bearing 300 to be tested only connected to the air duct 101, and then after the external air source passes a rated amount of gas into the air duct 101, the internal cavity of the bearing 300 to be tested forms a pressurized environment, and the air pressure is measured after the set pressure holding time, and compared with the air pressure of the bearing standard parts. If the pressure difference is within the allowable range, it is qualified. If the pressure difference is too large, it means that the gas leakage is serious and the sealing performance is not up to standard, which solves the problem of how to perform sealing detection of bearings used for harmonic reducers before installation and use in the prior art. Moreover, by testing the sealing performance of the bearing before installation and use, the probability of oil seepage and leakage can be reduced, thereby improving the accuracy and service life of the reducer.

[0047] It should be noted that the amount of air introduced into the bearing sealing detection device can be ensured by controlling the ventilation time to be consistent each time; the pressure detection is measured by a sensor. Because the sensor requires an electrical control connection, the pressure detection point is set in the pipeline of the external air source so that the sensor can communicate with the electrical control box. In this way, the air pressure value of the internal cavity of the bearing 300 to be tested can be accurately fed back.

[0048] In a specific embodiment, the tooling assembly 1 includes a first pressing plate 11 and a second pressing plate 12; the first pressing plate 11 is connected to the workbench and is provided with a bearing placement groove 102, and an air duct 101 is provided in the first pressing plate 11, and the outlet of the air duct 101 is located at the center of the first pressing plate 11 or near the center; the second pressing plate 12 can be moved to a position opposite to the first pressing plate 11 along the first direction; wherein, when the bearing 300 to be tested is located in the bearing placement groove 102, the first pressing plate 11 can be in sealing contact with the end face of the outer ring 100 of the bearing 300 to be tested, and the second pressing plate 12 can be in sealing contact with the end face of the inner ring 200 of the bearing 300 to be tested, and because the inner ring 200 and the outer ring 100 of the bearing are in the axial direction, a gap 13 is formed between the inner ring 200 of the bearing 300 to be tested and the first pressing plate 11, and the gap 13 connects the internal cavity of the bearing 300 to be tested and the air duct 101 of the bearing 300 to be tested.

[0049] In this way, the tooling assembly 1 adopts a two-pressure plate design, and the bearing placement groove 102 provides a clear detection placement position for the bearing 300 to be tested. The bearing 300 to be tested is placed in the bearing placement groove 102 with the outer side of the skeleton oil seal facing the second pressure plate 12, and then the second pressure plate 12 is pressed onto the bearing 300 to be tested. Under the cooperative sealing action of the first pressure plate 11 and the second pressure plate 12, the roller groove, the gap 13 between the inner ring 200 of the bearing 300 to be tested and the first pressure plate 11, and the air duct 101 are constructed as the only inflation path. The total inflation volume is small, and when connected to an external air source, a closed pressurized space is formed. Such a small-volume pressurized space can improve the sensitivity and accuracy of detection, facilitate the detection of small changes, and the small inflation volume can also shorten the detection time and improve work efficiency.

[0050] In addition, in addition to the above-mentioned fixed position of the first pressing plate 11, the second pressing plate 12 can also move in a manner that the first pressing plate 11 and the second pressing plate 12 can both move in opposite directions; or, the second pressing plate 12 is rotatably connected to the first pressing plate 11 by a pin shaft.

[0051] Furthermore, the sealing contact between the pressure plate and the bearing 300 to be tested can be achieved through a sealing ring. A first sealing ring 103 is provided in the bearing placement groove 102. The first sealing ring 103 can be pressed and contacted with the end face of the outer ring 100 of the bearing 300 to be tested, that is, the first sealing ring 103 can be sealed on the radial outer side of the roller groove; a second sealing ring 104 is provided on the side of the second pressure plate 12 facing the first pressure plate 11. The second sealing ring 104 can be pressed and contacted with the end face of the inner ring 200 of the bearing 300 to be tested, that is, the second sealing ring 104 can be sealed on the radial inner side of the skeleton oil seal. In this way, by utilizing the elastic deformation ability of the sealing ring, the first pressure plate 11 and the second pressure plate 12 press the bearing 300 to be tested in opposite directions, so that the first sealing ring 103 and the second sealing ring 104 are in an interference extrusion state, thereby forming a circumferential seal at the corresponding position.

[0052] In a preferred embodiment, a protruding boss 105 is provided in the bearing placement groove 102, and the boss 105 can extend into the inner ring 200 of the bearing 300 to be tested, that is, the bearing placement groove 102 is an annular groove. In this way, the boss 105 in the bearing placement groove 102 plays the role of filling the central space of the inner ring 200, so that the air-filled space formed between the inner ring 200 and the first pressure plate 11 is narrow, thereby achieving the purpose of reducing air consumption and improving detection efficiency.

[0053] like Figure 4As shown, the air passage 101 can be set through the boss 105, and the gap 13 between the inner ring 200 of the bearing 300 to be tested and the first pressure plate 11 is formed between the top surface of the boss 105 and the second pressure plate 12, between the circumference of the boss 105 and the inner annular surface of the inner ring 200 of the bearing 300 to be tested, and between the end face of the inner ring 200 of the bearing 300 to be tested and the bottom of the bearing placement groove 102, all of which are narrow spaces.

[0054] Regarding how the first pressing plate 11 and the second pressing plate 12 form a seal and press the bearing 300 to be tested, in a preferred embodiment, the bearing sealing detection device further includes a power mechanism disposed on the workbench, which can drive the second pressing plate 12 to reciprocate along the first direction and apply pressure to the second pressing plate 12 so that the second pressing plate 12 presses the bearing 300 to be tested onto the first pressing plate 11. The first direction is the axial direction of the bearing 300 to be tested, which can be a vertical direction.

[0055] With such configuration, the power mechanism can not only adjust the position of the second pressure plate 12 , but also apply pressure after the second pressure plate 12 contacts the bearing 300 to be tested, so as to squeeze the first sealing ring 103 and the second sealing ring 104 .

[0056] Of course, in addition to the above-mentioned method of controlling the position of the second pressure plate 12 by an electrical mechanism, it is also feasible to replace the power mechanism with other structures that can achieve linear displacement, such as a screw nut, and manually screw the screw to displace it, so as to pressurize the second pressure plate 12 to achieve sealing.

[0057] In a specific embodiment, the workbench is a multi-layer structure, including a base 2, a top seat 3 and a column 4; the base 2 is connected to a first pressure plate 11; the top seat 3 is located above the base 2 and is installed with a power mechanism; the column 4 is supported between the base 2 and the top seat 3 along a first direction, that is, the first direction is a vertical direction; wherein the second pressure plate 12 is located in the space between the base 2 and the top seat 3.

[0058] With such arrangement, the second pressure plate 12 is driven by the power mechanism to move up and down, and the first pressure plate 11 and the second pressure plate 12 approach and move away from each other in the vertical direction. In this way, when the power mechanism applies pressure to the second pressure plate 12 for sealing, the second pressure plate 12 and the first pressure plate 11 are subjected to uniform force, so that the first sealing ring 103 and the second sealing ring 104 are squeezed evenly and the sealing effect is good.

[0059] In a preferred embodiment, the workbench also includes a slide 5 located between the base 2 and the top seat 3, and the slide 5 is slidably connected to the column 4; the second pressure plate 12 is connected to the bottom surface of the slide 5, and the power mechanism can drive the slide 5 to slide along the column 4.

[0060] With such arrangement, the column 4 guides the slide 5, and the second pressure plate 12, driven by the slide 5, has a stable and consistent moving path, thereby improving the sealing reliability of the tooling assembly 1; as to how the slide 5 is specifically slidably connected to the column 4, the column 4 can be specifically used as a guide column, and the slide 5 is connected to the column 4 via a linear bearing, as shown in the figure.

[0061] In a specific embodiment, the power mechanism includes a cylinder 8 and a connecting seat 9, the cylinder body of the cylinder 8 is connected to the top seat 3, the connecting seat 9 is connected to the slide 5, and the piston rod of the cylinder 8 is connected to the connecting seat 9. In this way, it is convenient to assemble the cylinder 8 and the workbench. Of course, in addition to the cylinder 8, electric cylinders and oil cylinders are also feasible.

[0062] When the cylinder 8 drives the second pressure plate 12 away from the first pressure plate 11, the bearing sealing detection device is in a standby state; when the cylinder 8 drives the second pressure plate 12 to press the bearing 300 to be tested into the first pressure plate 11, the bearing sealing detection device is in a working state.

[0063] In a preferred embodiment, the workbench also includes a first tooling mounting plate 6 arranged on the base 2, and the first pressure plate 11 is detachably connected to the first tooling mounting plate 6 by fasteners; a main air duct 601 and an air interface 602 connected to the main air duct 601 are provided in the first tooling mounting plate 6, the main air duct 601 is sealed and connected to the air duct 101, and the air interface 602 is used for plugging in an external air source.

[0064] In this way, the position for docking with the external air source is set on the first tooling mounting plate 6 which does not need to be disassembled, and the first pressure plate 11 is detachable, so it is convenient to replace different types of first pressure plates 11, so that the size of the first pressure plate 11 and the position of the first sealing ring 103 are adapted to the target bearing 300 to be tested, so as to adapt to the detection of bearings of different sizes and models, thereby enhancing the versatility and applicability of the bearing sealing detection device for detecting various models of cross roller bearings.

[0065] It should be noted that the sealed docking between the main air duct 601 and the ventilation duct 101 can be achieved by providing a third sealing ring 603 on the outer periphery of the docking interface of the main air duct 601 toward the first pressure plate 11. When the first tooling mounting plate 6 and the first pressure plate 11 are fastened together, the third sealing ring 603 is squeezed to achieve sealed docking.

[0066] In another preferred embodiment, a second tooling mounting plate 7 is provided on the bottom surface of the slide 5, and the second pressing plate 12 is detachably connected to the second tooling mounting plate 7 via fasteners.

[0067] Such a configuration makes it easy to replace different types of second pressure plates 12 so that the size of the second pressure plate 12 and the position of the second sealing ring 104 are adapted to the target bearing 300 to be tested, so as to adapt to the detection of bearings of different sizes and models, thereby enhancing the versatility and applicability of the bearing sealing detection device for detecting various models of cross roller bearings.

[0068] In a specific embodiment, the first pressing plate 11 has several specifications with different sizes; and / or, the second pressing plate 12 has several specifications with different sizes. Specifically, the first pressing plate 11 and the second pressing plate 12 can be prefabricated with multiple independent pressing plates of different sizes to form multiple pressing plates of different specifications, and the corresponding ones can be directly replaced as needed; or in some cases, it can also be that only one first pressing plate 11 and one second pressing plate 12 are provided, and they are larger in size, and multiple concentrically distributed sealing ring grooves with different diameters are provided on the first pressing plate 11 and the second pressing plate 12. According to different models of the bearing 300 to be tested, it is also feasible to install sealing rings in the corresponding sealing ring grooves and then use them.

[0069] Illustratively, by replacing the first pressure plate 11 and the second pressure plate 12, the bearing sealing detection device provided in the present application can at least detect cross roller bearings of the 14 series and 32 series.

[0070] Figure 3 , Figure 4 The model of the cross roller bearing is 14 series; Figure 6 The structure of the first pressing plate 11 and the second pressing plate 12 required for testing another cross roller bearing is given in FIG. Figure 6 The model of the cross roller bearing is 32 series.

[0071] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0072] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0073] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0074] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0075] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0076] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A bearing sealing detection device, characterized in that: include: Workbench; A tooling assembly (1) is arranged on the workbench and is used to place the bearing (300) to be tested, and the tooling assembly (1) is provided with an air passage (101) that can communicate with an external air source; The tooling assembly (1) can be in sealing contact with both end surfaces of the bearing to be tested (300), and the internal cavity sealed by the skeleton oil seal of the bearing to be tested (300) can only be connected to the air passage (101), and the outer side of the skeleton oil seal of the bearing to be tested (300) is located in the external environment.

2. The bearing sealing detection device according to claim 1, characterized in that: The tooling assembly (1) comprises: A first pressing plate (11), connected to the workbench and provided with a bearing placement groove (102), wherein the first pressing plate (11) is provided with the air passage (101); A second pressing plate (12) capable of moving to a position opposite to the first pressing plate (11) along a first direction; When the bearing to be tested (300) is located in the bearing placement groove (102), the first pressure plate (11) can be in sealing contact with the end face of the outer ring (100) of the bearing to be tested (300), and the second pressure plate (12) can be in sealing contact with the end face of the inner ring (200) of the bearing to be tested (300), and a gap (13) is formed between the inner ring (200) of the bearing to be tested (300) and the first pressure plate (11), and the gap (13) connects the internal cavity of the bearing to be tested (300) and the air passage (101).

3. The bearing sealing detection device according to claim 2, characterized in that: A first sealing ring (103) is provided in the bearing placement groove (102), and the first sealing ring (103) can be in compression contact with the end surface of the outer ring (100) of the bearing (300) to be tested; A second sealing ring (104) is provided on a surface of the second pressing plate (12) facing the first pressing plate (11), and the second sealing ring (104) can be in compression contact with the end surface of the inner ring (200) of the bearing (300) to be tested.

4. The bearing sealing detection device according to claim 2, characterized in that: A convex column (105) is provided in the bearing placement groove (102), and the convex column (105) can extend into the inner ring (200) of the bearing (300) to be tested.

5. The bearing sealing detection device according to claim 2, characterized in that: It also includes a power mechanism arranged on the workbench, which can drive the second pressing plate (12) to move back and forth along the first direction and can apply pressure to the second pressing plate (12).

6. The bearing sealing detection device according to claim 5, characterized in that: The workbench comprises: A base (2) connected to the first pressing plate (11); A top seat (3), located above the base (2) and having the power mechanism installed thereon; A column (4) supported between the base (2) and the top seat (3) along the first direction; Wherein, the second pressing plate (12) is located in the space between the base (2) and the top seat (3).

7. The bearing sealing detection device according to claim 6, characterized in that: The workbench further comprises a slide (5) located between the base (2) and the top seat (3), and the slide (5) is slidably connected to the column (4); The second pressing plate (12) is connected to the bottom surface of the slide (5), and the power mechanism can drive the slide (5) to slide along the column (4).

8. The bearing sealing detection device according to claim 7, characterized in that: The workbench further comprises a first tooling mounting plate (6) arranged on the base (2), and the first pressing plate (11) is detachably connected to the first tooling mounting plate (6); The first tooling installation plate (6) is provided with a main air channel (601) and an air interface (602) in communication with the main air channel (601), the main air channel (601) is sealed and docked with the air channel (101), and the air interface (602) is used for plugging in an external air source; A second tooling mounting plate (7) is provided on the bottom surface of the slide (5), and the second pressing plate (12) is detachably connected to the second tooling mounting plate (7).

9. The bearing sealing detection device according to claim 8, characterized in that: The first pressing plate (11) has a plurality of specifications with different sizes; And / or, the second pressing plate (12) has several specifications with different sizes.

10. The bearing sealing detection device according to claim 7, characterized in that: The power mechanism comprises a cylinder (8) and a connecting seat (9), the cylinder body of the cylinder (8) is connected to the top seat (3), the connecting seat (9) is connected to the slide (5), and the piston rod of the cylinder (8) is connected to the connecting seat (9).

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