Air tightness detection device for hub bearing sealing element

Abstract

The utility model discloses a wheel hub bearing sealing member air tightness detection device comprising a frame body, the frame body is provided with a rotating shaft and a driving motor used for driving the rotating shaft to rotate, and the free end of the rotating shaft is connected with a bracket used for installing an outer ring of a bearing to be detected. The bracket is further matched with an abutting seat used for being matched with an inner ring of a hub bearing to be detected, the abutting seat is provided with a connecting port and a detection port, the connecting port is matched with an air pump used for injecting air, and the detection port is matched with an air pressure detector; the frame body is provided with an abutting cylinder which is used for pressing the abutting seat on the inner ring of the hub bearing to be tested. The air tightness detection device is simple in structure and reasonable in layout, can effectively detect the air tightness of the hub bearing, and has a good use effect.

Description

Technical Field

[0001] The utility model relates to an air tightness detection device for a hub bearing sealing element. Background Art

[0002] The driving environment of automobiles varies greatly, so the service life of automobile wheel hub bearings is greatly affected by the sealing performance of their seals. Therefore, in the research and development and production of wheel hub bearings, the air tightness test of seals is particularly important. However, the air tightness test of wheel hub bearings is currently difficult, the testing equipment is complex, the testing efficiency is low, and the actual working conditions cannot be simulated well during testing, which affects the reliability of the test results. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a wheel hub bearing seal air tightness detection device, which has a simple structure and a reasonable layout, can effectively detect the air tightness of the wheel hub bearing, and has a good use effect.

[0004] To achieve the above-mentioned purpose, the utility model provides a wheel hub bearing seal air tightness detection device, including a frame, the frame is provided with a rotating shaft and a driving motor for driving the rotating shaft to rotate, the free end of the rotating shaft is connected to a bracket for mounting the outer ring of the bearing to be tested, the bracket is also equipped with a resistance seat for matching with the inner ring of the wheel hub bearing to be tested, the resistance seat is provided with a connecting port and a detection port, the connecting port is equipped with an air pump for injecting gas, the detection port is equipped with an air pressure detector, and the frame is provided with a resistance cylinder for pressing the resistance seat against the inner ring of the wheel hub bearing to be tested.

[0005] The beneficial effect of such an arrangement is as follows: in such an arrangement, during detection, the wheel hub bearing is mounted on the bracket so that the inner ring of the wheel hub bearing cooperates with the bracket, the abutment seat is pressed onto the upper end face of the outer ring of the exposed bearing through the abutment cylinder, the rotating shaft is driven to rotate by the driving motor, and gas is introduced into the position of the abutment seat at the same time, and the gas pressure change is detected by cooperating with the air pressure detector to judge the sealing performance of the bearing seal. This structure is simple, reliable and convenient to operate, and has a good use effect.

[0006] As a further configuration of the utility model, an insert protrusion for cooperating with the inner ring of the wheel hub bearing to be tested is arranged between the abutment seat and the bracket, and the insert protrusion is arranged on a side close to the abutment seat. A sealing groove is opened on the outer peripheral wall of the insert protrusion, and a sealing ring is matched in the sealing groove for fitting on the inner ring of the wheel hub bearing to be tested.

[0007] The beneficial effect of such an arrangement is that it ensures that the end of the wheel hub bearing away from the bracket is sealed, preventing gas from entering the bracket from this position, thereby affecting the accuracy of the air tightness test. At the same time, the structure is simple and can perform auxiliary positioning to ensure smooth operation of the structure and has a good use effect.

[0008] As a further configuration of the utility model, the abutment protrusion is fixedly connected to the bracket.

[0009] The beneficial effect of such an arrangement is that the fixed connection here adopts a plug-in fixation method through a fixing piece extending to the bracket, so that the connection is convenient and reliable. At the same time, the connection with the bracket makes the interference to the detection smaller, avoids gas leakage due to the gap caused by the relative displacement of the inner ring and the abutment seat, and ensures the reliability of the detection.

[0010] As a further configuration of the present invention, the abutment protrusion is fixedly connected to the abutment seat.

[0011] The beneficial effect of such arrangement is that such arrangement ensures stable connection, and the connection method here can adopt the form of plug-in matching, which is convenient for connection and adaptable to structures of different wheel hub sizes.

[0012] As a further configuration of the utility model, the output end of the abutting cylinder is connected to a pressure plate, a guide rod is arranged on the pressure plate, and the guide rod is slidably matched with the frame.

[0013] The beneficial effect of such arrangement is that such arrangement improves the stability of the operation of the pressing plate, ensures the reliability of the resistance, and at the same time has a simple structure and good use effect.

[0014] As a further configuration of the utility model, the bracket is provided with an abutment flange, and the abutment flange is engaged with a clamping groove on the inner ring of the wheel hub bearing to be tested.

[0015] The beneficial effect of such arrangement is that such arrangement ensures the connection stability between the bracket and the wheel hub bearing to be tested, and at the same time, the structure is simple, the connection is reliable, and good use effect is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 It is a schematic cross-sectional structure diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0018] The implementation example of the air tightness detection device for the hub bearing seal of the utility model is as follows: Figure 1 to Figure 2As shown: it includes a frame 1, on which a rotating shaft 6 and a driving motor 2 for driving the rotating shaft 6 to rotate are provided, a bracket 7 for mounting the outer ring of the bearing to be tested is connected to the free end of the rotating shaft 6, and the bracket 7 is also equipped with a resistance seat 5 for matching with the inner ring of the wheel hub bearing to be tested, and the resistance seat 5 is provided with a connecting port and a detection port 51, the connecting port is equipped with an air pump for injecting gas, and the detection port 51 is equipped with an air pressure detector, and the frame 1 is provided with a resistance cylinder 3 for pressing the resistance seat 5 against the inner ring of the wheel hub bearing to be tested. The beneficial effect of such arrangement is as follows: in such arrangement, during detection, the wheel hub bearing is mounted on the bracket 7 so that the inner ring of the wheel hub bearing cooperates with the bracket 7, the abutment seat 5 is pressed onto the upper end face of the outer ring of the exposed bearing through the abutment cylinder 3, the rotating shaft 6 is driven to rotate by the driving motor 2, and gas is introduced into the position of the abutment seat 5 at the same time, and the gas pressure change is detected by cooperating with the air pressure detector to judge the sealing performance of the bearing seal. This structure is simple, reliable and convenient to operate, and has a good use effect.

[0019] As a further configuration of this embodiment, a plug-in protrusion 52 for matching with the inner ring of the wheel hub bearing to be tested is provided between the abutment seat 5 and the bracket 7, and the plug-in protrusion 52 is provided on a side close to the abutment seat 5, and a sealing groove is provided on the outer peripheral wall of the plug-in protrusion 52, and a sealing ring for fitting on the inner ring of the wheel hub bearing to be tested is matched in the sealing groove. The beneficial effect of such a configuration is that such a configuration ensures that the end of the wheel hub bearing away from the bracket 7 is sealed, and prevents gas from entering the bracket 7 from this position, thereby affecting the accuracy of the air tightness detection, and at the same time, the structure is simple, and auxiliary positioning can be performed to ensure the smooth operation of the structure, and has a good use effect.

[0020] As a further configuration of this embodiment, the abutment protrusion is fixedly connected to the abutment seat 5. The beneficial effect of this configuration is that it ensures a stable connection, and the connection mode here can be in the form of an integrated configuration, which is convenient for connection and adaptable to structures of different hub sizes.

[0021] As a further configuration of this embodiment, the output end of the abutting cylinder 3 is connected to a pressing plate 4, and a guide rod 41 is provided on the pressing plate 4, and the guide rod 41 is slidably matched with the frame 1. The beneficial effect of this configuration is that the stability of the operation of the pressing plate 4 is improved, the reliability of the abutment is ensured, and the structure is simple and has a good use effect.

[0022] As a further configuration of this embodiment, a contact flange is provided on the bracket 7, and the contact flange is engaged with the clamping groove on the inner ring of the wheel hub bearing to be tested. The beneficial effect of this configuration is that the connection stability between the bracket 7 and the wheel hub bearing to be tested is ensured, and at the same time, the structure is simple, the connection is reliable, and good use effect is achieved.

[0023] The above example is only one preferred specific example of the present invention. The common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A wheel hub bearing seal air tightness detection device, comprising a frame, on which a rotating shaft and a driving motor for driving the rotating shaft are arranged, characterized in that: The free end of the rotating shaft is connected to a bracket for mounting the outer ring of the bearing to be tested, and the bracket is also equipped with a resistance seat for cooperating with the inner ring of the wheel hub bearing to be tested. The resistance seat is provided with a connecting port and a detecting port, the connecting port is equipped with an air pump for injecting gas, the detecting port is equipped with an air pressure detector, and the frame is provided with a resistance cylinder for pressing the resistance seat against the inner ring of the wheel hub bearing to be tested.

2. The wheel hub bearing seal air tightness detection device according to claim 1, characterized in that: An inserting protrusion for cooperating with the inner ring of the wheel hub bearing to be tested is arranged between the abutment seat and the bracket. The inserting protrusion is arranged on a side close to the abutment seat. A sealing groove is opened on the outer peripheral wall of the inserting protrusion. A sealing ring is matched in the sealing groove for fitting on the inner ring of the wheel hub bearing to be tested.

3. The wheel hub bearing seal air tightness detection device according to claim 2, characterized in that: The plug-in protrusion is fixedly connected to the bracket.

4. The wheel hub bearing seal air tightness detection device according to claim 3, characterized in that: The plug-in protrusion is fixedly connected to the abutment seat.

5. The wheel hub bearing seal air tightness detection device according to claim 1, characterized in that: The output end of the abutment cylinder is connected with a pressure plate, and a guide rod is arranged on the pressure plate, and the guide rod is slidably matched with the frame.

6. The wheel hub bearing seal air tightness detection device according to claim 1, characterized in that: The bracket is provided with a resisting flange, and the resisting flange is engaged with a clamping groove on the inner ring of the wheel hub bearing to be tested.

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