Wheel hub lubricant monitoring system

Abstract

This invention provides a wheel hub lubricating oil monitoring system, belonging to the field of wheel hub detection technology. It solves the problem of how to accurately and stably detect the oil level and temperature of the wheel hub lubricating oil. The monitoring system includes a data monitoring device and two electrode plates, both located within the lubricating oil cavity. Both electrode plates have a disc-shaped structure, and their axes coincide with the axis of the wheel hub. The base is equipped with several heat- and electrical conductive electrode posts protruding into the lubricating oil cavity. Each electrode plate has an individually fixed electrode post. The data monitoring device is located inside the wheel hub, with one end of each electrode post extending into the mounting cavity and electrically connected to the data monitoring device. Different oil levels in the lubricating oil cavity cause changes in the capacitance between the two electrode plates. By detecting the capacitance between the two electrode plates, the lubricating oil level change data can be obtained. This data is recorded by the data monitoring device and transmitted to a display device for display, resulting in very high detection accuracy.

Description

Technical Field

[0001] This invention belongs to the field of wheel hub testing technology and relates to a wheel hub lubricating oil monitoring system. Background Technology

[0002] After prolonged operation, the lubricating oil inside the wheel hub generates high temperatures. These high temperatures can cause the lubricating oil or grease to fail or decrease, leading to abnormal operation and failure of the wheel hub bearing. If the driver does not notice this in time, it can result in anything from unusual vehicle noises to serious issues like wheel malfunction and loss of vehicle control. Therefore, to avoid these problems, it is essential to regularly check the lubricating oil condition at the wheel hub, including checking the oil level and quality. If any issues are found, timely repair or replacement of the lubricating oil is necessary.

[0003] However, this passive inspection method is difficult for many drivers to perform regularly, and many inexperienced drivers are even unaware that they need to periodically check the wheel hub lubricating oil. Later, some people designed a monitoring system that can measure the lubricating oil temperature in real time. However, such a monitoring system simply relies on a temperature probe fixed to the wheel hub shell to detect the temperature of the wheel hub shell to infer the temperature of the lubricating oil at the wheel end. This design is obviously not very accurate. Moreover, since the entire detection device is fixed to the outside of the wheel hub, the detection device is easily damaged by centrifugal force as the vehicle moves. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a wheel hub lubricating oil monitoring system. It solves the technical problem of how to accurately and stably detect the oil level and temperature of the wheel hub lubricating oil.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A wheel hub lubricating oil monitoring system is provided. The wheel hub includes a wheel hub end cap housing with a lubricating oil channel inside the end cap housing. The system is characterized by a base fixed to the end cap housing, a pressure cap fixed to the base, the pressure cap fixed to the base on the side opposite to the wheel hub, and an installation chamber between the pressure cap and the base. The end cap housing and the base enclose a lubricating oil cavity communicating with the lubricating oil channel. The monitoring system includes a data monitoring device and two parallel electrode plates, both made of thermally and electrically conductive materials. Both electrode plates are located within the lubricating oil cavity, both electrode plates have a disc-shaped structure, and their axes coincide with the axis of the wheel hub. A plurality of thermally and electrically conductive electrode posts are embedded in the base, each electrode plate having an individually fixed electrode post. The data monitoring device is located within the installation chamber, and one end of each electrode post extends into the installation chamber and is electrically connected to the data monitoring device.

[0007] This application redesigns the wheel hub end cap and improves the installation method. The wheel hub end cap is redesigned, retaining only the wheel hub end cap shell, while the rest is redesigned. The transparent window is eliminated, and a base and a pressure cap are added. The base and the wheel hub end cap shell form a lubricating oil cavity that communicates with the lubricating oil channel inside the wheel hub. In this way, measuring the lubricating oil temperature and liquid level in the lubricating oil cavity is equivalent to measuring the lubricating oil in the lubricating oil channel, resulting in extremely high measurement accuracy.

[0008] The monitoring system of this application includes two electrode plates disposed within the lubricating oil chamber. The two electrode plates are arranged parallel to each other and are connected to a data detection device via electrode posts. Differences in the oil level within the lubricating oil chamber cause changes in the capacitance between the two electrode plates. Therefore, by detecting the capacitance between the two electrode plates, data on the change in lubricating oil level can be obtained. This data is recorded by the data monitoring device and transmitted to a display device for display, resulting in very high detection accuracy. The axes of the two electrode plates in this application coincide with the axis of the wheel hub, and both electrode plates are disc-shaped with uniform mass. This prevents the two electrode plates from deflecting or shifting when the wheel hub rotates, ensuring overall stability and significantly improving monitoring stability.

[0009] The data monitoring device of this application is separately installed in the mounting chamber between the gland and the base. The mounting chamber is independent of the lubricating oil chamber, which can effectively prevent the data monitoring device from being corroded by the oil and also isolate the heat of the oil, thus playing a good role in protecting the data monitoring device and improving the stability of the entire monitoring system.

[0010] The electrode plate of this application is in direct contact with the lubricating oil and can also conduct heat. The electrode plate directly conducts heat to the electrode column, which is also made of thermally and electrically conductive material. It can further conduct heat to the data monitoring device for collection and directly transmit the relevant data to the display device for display. This electrode plate design can monitor both oil level and oil temperature, making it a multi-purpose device with very high monitoring accuracy.

[0011] In the aforementioned wheel hub lubricating oil monitoring system, the base has several evenly spaced positioning posts protruding circumferentially around the lubricating oil cavity side with the base axis as the center. Each positioning post has a positioning hole that penetrates the base. Each positioning hole has an electrode post inserted into it, and the outer circumferential surface of the electrode post is circumferentially sealed with the hole wall of the positioning hole. Two electrode plates are fixed on different positioning posts and welded to the electrode posts on the positioning posts.

[0012] This application features several positioning posts protruding from the base, all centered on the base axis. These positioning posts, arranged in a circle, can counteract centrifugal force when the hub rotates, ensuring the hub maintains a uniform stress distribution. This also allows the electrode plate, fixed to the base, to maintain a relatively stable stress distribution, enabling stable monitoring of oil level and temperature.

[0013] The electrode posts are electrically and thermally conductive. Inserting them into the positioning holes on the positioning posts provides support and enhances the overall structural strength. Furthermore, the positioning posts also offer some insulation, improving heat conduction and resulting in more accurate and precise measurements from the data monitoring device.

[0014] In the aforementioned wheel hub lubricating oil monitoring system, all the positioning pins can be divided into two groups, and all the positioning pins are distributed on the same circumference. The height of the positioning pins in one group is greater than the height of the positioning pins in the other group, and the higher positioning pins and the lower positioning pins are spaced apart from each other. The positioning pins of the lower group are fixed to the electrode plate on the side closer to the base, and the positioning pins of the higher group are fixed to the electrode plate on the side farther away from the base.

[0015] The positioning posts can be divided into a longer group and a shorter group. These two groups are mainly for connecting and fixing with two parallel electrode plates. Several positioning posts in the shorter group are fixed to the electrode plate closer to the base, while the longer group is fixed to the electrode plate further away. In this way, the two electrode plates do not interfere with each other and remain parallel to each other.

[0016] In the aforementioned wheel hub lubricating oil monitoring system, the electrode plate near the base has several grooves for avoiding the higher set of positioning posts. Each of the higher set of positioning posts is respectively locked in the grooves of the electrode plate, and the positioning posts in the corresponding grooves limit the electrode plate.

[0017] The longer set of positioning posts can also lock and limit the electrode plate on the side closest to the base. In this way, all positioning posts, regardless of their length, can limit and fix the electrode plate on the side closest to the base, and provide sufficient support for the electrode plate in its circumferential direction. This greatly improves the overall structural strength after fixing, and greatly enhances the overall stability during use.

[0018] In the aforementioned wheel hub lubricating oil monitoring system, an inner hole is provided at the center of the electrode plate on the side away from the base, and the center line of the inner hole coincides with the axis of the base.

[0019] This application features an inner hole on the outer electrode plate, giving the entire electrode plate a ring-shaped structure. This design facilitates the flow of lubricating oil within the lubricating oil cavity and ensures that the outer electrode plate does not obstruct the inner electrode plate, thus enabling accurate temperature measurement on both electrode plates.

[0020] In the aforementioned wheel hub lubricating oil monitoring system, the data monitoring device includes an integrated circuit board, a data processor, and a power supply. The integrated circuit board has a ring-shaped structure, and its center line coincides with the wheel hub axis. The data processor is soldered onto the integrated circuit board, and the power supply is electrically connected to the integrated circuit board and fixed on the outer periphery of the base.

[0021] The data monitoring device of this application includes an integrated circuit board, a data processor, and a power supply. The data processor also includes a Bluetooth module. The data processor can process the collected data and transmit it to the vehicle's central control system. The integrated circuit can collect the temperature transmitted from the electrode posts, and can also discharge the electrode posts and detect the capacitance change between the two electrode plates. The centerline of the entire integrated circuit board coincides with the wheel hub axis. When the wheel hub rotates, the centrifugal force on the entire integrated circuit board is relatively uniform and self-cancelling, which is beneficial to the long-term use of the entire integrated circuit board and further improves its stability.

[0022] The power supply of this application can provide all the power needed for the entire monitoring system, and the power supply is fixed separately on the outside of the wheel hub, making it easy to install and remove.

[0023] In the aforementioned wheel hub lubricating oil monitoring system, the data monitoring device includes an integrated circuit board, a data processor, and a power supply, all three being integrally formed.

[0024] This is the second implementation of the data monitoring device in this case. In this embodiment, the integrated circuit board, data processor and power supply are integrated into a whole. This design has high connection strength and can achieve the same technical effect as the above solution.

[0025] In the aforementioned wheel hub lubricating oil monitoring system, one end of each electrode post extends through a positioning hole into the mounting chamber and is fixed to the integrated circuit board.

[0026] In this application, one end of the electrode post is fixed to the electrode plate, and the other end of the electrode post is fixed to the integrated circuit board. This direct connection can accurately conduct heat to the integrated circuit board for data acquisition, making the acquired data very accurate.

[0027] In the aforementioned wheel hub lubricating oil monitoring system, the data processor and the power supply are located on opposite sides of the wheel hub axis.

[0028] The data processor is soldered onto the integrated circuit board, while the power supply is located on the outer periphery of the hub. By setting the power supply and data processor roughly symmetrically, they can counteract the centrifugal force generated by each other when the hub rotates. This design further improves the stability of the entire system.

[0029] In the aforementioned wheel hub lubricating oil monitoring system, the base has a disc-shaped structure. A connecting part protrudes circumferentially from the side of the base near the lubricating oil cavity. The connecting part is fixed to the wheel hub end cover housing. An annular groove is formed on the side of the base away from the lubricating oil cavity. The integrated circuit board is embedded in the annular groove and the pressure cap is fixed to the base by bolts.

[0030] The integrated circuit board is embedded in the annular groove on the base, thus forming an integral whole with the base, which can effectively improve the structural strength.

[0031] Compared with existing technologies, the advantages of this product are:

[0032] 1. The different liquid levels in the lubricating oil chamber will cause changes in the capacitance between the two electrode plates. Therefore, by detecting the capacitance between the two electrode plates, the data on the change in lubricating oil level can be obtained. The data is recorded by the data monitoring device and transmitted to the display device for display, which results in very high detection accuracy.

[0033] 2. The axes of the two electrode plates in this application coincide with the axis of the hub, and both electrode plates are disc-shaped with uniform mass. This ensures that the two electrode plates will not deflect or shift when the hub rotates, allowing the whole to maintain a very stable state and greatly improving the stability of monitoring.

[0034] 3. The electrode plate of this application is in direct contact with the lubricating oil and can also conduct heat. The electrode plate directly conducts heat to the electrode column, which is also made of thermally and electrically conductive material. It can further conduct heat to the data monitoring device for collection and directly transmit the relevant data to the display module for display. This electrode plate design can monitor both the oil level and the oil temperature, making it a multi-purpose device with very high monitoring accuracy. Attached Figure Description

[0035] Figure 1 This is a partial cross-sectional view of the detection system of the present invention installed on the wheel hub;

[0036] Figure 2 This invention is in Figure 1 A magnified view of a portion of point A;

[0037] Figure 3 This is a side view of the base and the pressure cap of the present invention;

[0038] Figure 4This is another angle view of the base and the pressure cap of the present invention;

[0039] Figure 5 This is an exploded view of the base and the pressure cap of the present invention;

[0040] Figure 6 This is a part drawing of the electrode plate of the present invention;

[0041] Figure 7 This is a part drawing of the electrode plate of the present invention from another angle;

[0042] Figure 8 This is a part drawing of the base of the present invention;

[0043] Figure 9 This is a flowchart of the present invention.

[0044] In the diagram, 1. Electrode post; 2. Hub; 21. Pressure cap; 22. Base; 23. Mounting chamber; 24. Lubricating oil chamber; 25. Positioning post; 26. Positioning hole; 27. Connecting part; 28. Annular groove; 3. Hub end cover housing; 31. Lubricating oil channel; 4. Data monitoring device; 41. Integrated circuit board; 42. Data processor; 43. Power supply; 5. Electrode plate; 51. Groove; 52. Inner hole. Detailed Implementation

[0045] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0046] Example 1

[0047] like Figures 1-8The wheel hub lubricating oil monitoring system shown includes a wheel hub 2 comprising a wheel hub end cap housing 3, a bearing, a spacer, an oil seal, a pressure cap 21, and a base 22. The wheel hub end cap housing 3 is fitted onto the outside of the wheel hub 2, and a lubricating oil channel 31 is provided between the wheel hub end cap housing 3 and the wheel hub 2. An installation chamber 23 is provided between the pressure cap 21 and the base 22. The base 22 is fixed to the wheel hub end cap housing 3 at the end of the wheel hub 2, and the wheel hub end cap housing 3 and the base 22 surround each other to form a lubricating oil cavity 24 that communicates with the lubricating oil channel 31. The installation chamber 23 and the lubricating oil cavity 24 are arranged adjacent to each other with the base 22 as the interval and are independent of each other. This monitoring system includes a data monitoring device 4 and two parallel electrode plates 5, both made of thermally and electrically conductive materials. Both electrode plates 5 are located within the lubricating oil cavity 24, and both electrode plates 5 have a disc-shaped structure with their axes coinciding with the axis of the hub 2. The base 22 has several thermally and electrically conductive electrode posts 1 protruding into the lubricating oil cavity 24. Each electrode plate 5 has an individual electrode post 1 fixed to it. The data monitoring device 4 is located within the mounting chamber 23, and one end of each electrode post 1 extends into the mounting chamber 23 and is electrically connected to the data monitoring device 4. This application redesigns the hub 2 and improves the installation method. A base 22 and a pressure cap 21 are added to the hub end cap housing 3. The base 22 and the hub end cap housing 3 form a lubricating oil cavity 24 that communicates with the lubricating oil channel 31 of the hub 2. Therefore, measuring the lubricating oil temperature and level in the lubricating oil cavity 24 is equivalent to measuring the lubricating oil in the lubricating oil channel 31, resulting in extremely high measurement accuracy. The monitoring system of this application includes two electrode plates 5 disposed within the lubricating oil chamber 24. The two electrode plates 5 are arranged parallel to each other and are connected to the data detection device via electrode posts 1. Different liquid levels within the lubricating oil chamber 24 cause changes in the capacitance between the two electrode plates 5. Therefore, by detecting the capacitance between the two electrode plates 5, data on the change in lubricating oil level can be obtained. This data is recorded by the data monitoring device 4 and transmitted to the display device for display, resulting in very high detection accuracy. The axes of the two electrode plates 5 in this application coincide with the axis of the hub 2, and both electrode plates 5 are disc-shaped with uniform mass. This prevents the two electrode plates 5 from deflecting or shifting when the hub 2 rotates, ensuring overall stability and significantly improving monitoring stability. The data monitoring device 4 of this application is separately disposed within the mounting chamber 23 between the pressure cap 21 and the base 22. The mounting chamber 23 is independent of the lubricating oil chamber 24, effectively preventing the data monitoring device 4 from being corroded by the oil and isolating it from the heat of the oil, thus providing excellent protection for the data monitoring device 4 and improving the stability of the entire monitoring system.The electrode plate 5 of this application is in direct contact with the lubricating oil and can also conduct heat. The electrode plate 5 directly conducts heat to the electrode post 1, which is also made of thermally and electrically conductive material. It can further conduct heat to the data monitoring device 4 for collection and transmit the relevant data directly to the display device for display. This design of the electrode plate 5 can monitor both the oil level and the oil temperature, making it a multi-purpose device with very high monitoring accuracy.

[0048] On the side of the base 22 near the lubricating oil cavity 24, several evenly spaced positioning posts 25 protrude circumferentially around the axis of the base 22. Each positioning post 25 has a positioning hole 26 penetrating the base 22. An electrode post 1 passes through each positioning hole 26, and the outer circumferential surface of the electrode post 1 is circumferentially sealed with the hole wall of the positioning hole 26. Two electrode plates 5 are fixed on different positioning posts 25 and welded to the electrode posts 1 on the positioning posts 25. All positioning posts 25 can be divided into two groups, and all positioning posts 25 are distributed on the same circumference. The height of the positioning posts 25 in one group is greater than the height of the positioning posts 25 in the other group, and the higher positioning posts 25 and the lower positioning posts 25 are spaced apart. The positioning posts 25 in the lower group are fixed to the electrode plate 5 on the side closer to the base 22, and the positioning posts 25 in the higher group are fixed to the electrode plate 5 on the side farther away from the base 22. This application features several protruding positioning posts 25 on the base 22, all centered on the axis of the base 22. This arrangement of positioning posts 25, forming a ring, counteracts centrifugal force as the hub 2 rotates, ensuring a uniform stress distribution on the hub 2. This also allows the electrode plate 5, fixed to the base 22, to maintain a relatively stable stress state, facilitating stable monitoring of oil level and temperature. The electrode posts 1 are electrically and thermally conductive. Inserting the electrode posts 1 into the positioning holes 26 on the positioning posts 25 provides support and enhances the overall structural strength. Furthermore, the positioning posts 25 also provide insulation, improving the heat conduction of the electrode posts 1 and resulting in more accurate and precise measurements from the data monitoring device 4. The positioning posts 25 can be divided into a longer group and a shorter group. The purpose of these two groups is to connect and fix them to the two parallel electrode plates 5. Several positioning posts 25 of the shorter group are fixed to the electrode plate 5 on the side closer to the base 22, while the longer group is fixed to the electrode plate 5 further away. In this way, the two electrode plates 5 do not interfere with each other and remain parallel to each other.

[0049] The electrode plate 5 near the base 22 has several grooves 51 for avoiding the higher set of positioning posts 25. Each of the higher set of positioning posts 25 is respectively engaged in the grooves 51 on the electrode plate 5, and the positioning posts 25 in the corresponding grooves 51 limit the electrode plate 5. The longer set of positioning posts 25 can also lock and limit the electrode plate 5 near the base 22. In this way, all the positioning posts 25, regardless of their length, can limit and fix the electrode plate 5 near the base 22, and provide sufficient support for the electrode plate 5 in the circumferential direction, which greatly improves the overall structural strength after fixing, and greatly improves the overall stability during use.

[0050] An inner hole 52 is formed at the center of the electrode plate 5 on the side away from the base 22, and the center line of the inner hole 52 coincides with the axis of the base 22. This application provides an inner hole 52 on the outer electrode plate 5, making the entire electrode plate 5 have a ring-shaped structure. This design facilitates the flow of lubricating oil within the lubricating oil cavity 24, ensuring that the outer electrode plate 5 does not obstruct the inner electrode plate 5, thus ensuring accurate temperature measurement on both electrode plates 5. The base 22 has a disc-shaped structure. A connecting part 27 protrudes circumferentially from the side of the base 22 near the hub 2. The connecting part 27 is fixed to the hub end cover housing 3. An annular groove 28 is formed on the side of the base 22 away from the hub 2. The integrated circuit board 41 is embedded inside the annular groove 28, and the pressure cap 21 is fixed to the base 22 by bolts. The integrated circuit board 41 is entirely embedded in the annular groove 28 on the base 22, forming a whole with the base 22, effectively improving structural strength.

[0051] The data monitoring device 4 includes an integrated circuit board 41, a data processor 42, and a power supply 43. The integrated circuit board 41 has a ring-shaped structure, and its centerline coincides with the axis of the wheel hub 2. The data processor 42 is soldered onto the integrated circuit board 41, and the power supply 43 is electrically connected to the integrated circuit board 41 and fixed to the outer periphery of the base 22. The data monitoring device 4 of this application includes an integrated circuit board 41, a data processor 42, and a power supply 43. The data processor 42 also includes a Bluetooth module. The data processor 42 can process the collected data and transmit it to the vehicle's central control system. The integrated circuit can collect the temperature transmitted from the electrode post 1, and can also discharge the electrode post 1 and detect the capacitance change between the two electrode plates. The centerline of the entire integrated circuit board 41 coincides with the axis of the wheel hub 2. When the wheel hub 2 rotates, the centrifugal force on the entire integrated circuit board 41 is relatively uniform and self-cancelling, which is beneficial to the long-term use of the entire integrated circuit board 41 and further improves its stability. The power supply 43 of this application can provide all the power for the entire monitoring system, and the power supply 43 is separately fixed to the outside of the wheel hub 2, making it easy to install and remove. One end of each electrode post 1 extends through the positioning hole 26 into the mounting chamber 23 and is fixed to the integrated circuit board 41. In this application, one end of the electrode post 1 is fixed to the electrode plate 5, and the other end of the electrode post 1 is fixed to the integrated circuit board 41. This direct connection allows for precise heat conduction to the integrated circuit board 41 for data acquisition, resulting in highly accurate data. The data processor 42 and the power supply 43 are located on opposite sides of the axis of the hub 2. The data processor 42 is fixed to the integrated circuit board 41 by welding, while the power supply 43 is located on the outer periphery of the hub 2. By roughly symmetrically positioning the power supply 43 and the data processor 42, they can counteract the centrifugal force generated by each other when the hub 2 rotates, further improving the stability of the entire system.

[0052] like Figure 9 The diagram shows the signal processing module. As shown, the temperature and oil quantity acquisition module (i.e., electrode plate 5) collects the temperature and oil quantity information of the lubricating oil in the wheel hub 2, and then transmits it to the data analysis module (i.e., data processor 42) on the PCB board (i.e., integrated circuit board 41) for data analysis, filtering out noise and distorted signals, and then sending the signal to the display terminal in a timely manner through the Bluetooth signal transmission module. When the temperature of the lubricating oil or the oil temperature is abnormal, the display module will promptly warn the driver.

[0053] Example 2

[0054] This is the second implementation of the data monitoring device 4 in this case. In this embodiment, the data monitoring device 4 includes an integrated circuit board 41, a data processor 42, and a power supply 43, all of which are integrally formed. The integrated circuit board 41, the data processor 42, and the power supply 43 are integrated into a whole, which provides high connection strength and achieves the same technical effect as the above-mentioned solution.

[0055] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A wheel hub lubricating oil monitoring system, wherein the wheel hub (2) includes a wheel hub end cap housing (3), and the wheel hub end cap housing (3) has a lubricating oil channel (31) on its inner side, characterized in that, A base (22) is fixed on the hub end cover housing (3), and a pressure cap (21) is fixed on the base (22). The pressure cap (21) is fixed on the base (22) on the side away from the hub end cover housing (3). There is an installation chamber (23) between the pressure cap (21) and the base (22). The hub end cover housing (3) and the base (22) surround and form a lubricating oil cavity (24) that communicates with the lubricating oil channel (31). This monitoring system includes a data monitoring device (4) and two parallel pieces of material that are both heat-conducting and electrical-conducting. The electrode plates (5) are made of a material. Both electrode plates (5) are located in the lubricating oil cavity (24). Both electrode plates (5) are in a disc shape and the axes of both electrode plates (5) coincide with the axis of the hub (2). Several heat-conducting and electrical-conducting electrode posts (1) are embedded on the base (22). Each electrode plate (5) has an electrode post (1) fixed to it. The data monitoring device (4) is located in the installation chamber (23) and one end of the electrode post (1) extends into the installation chamber (23) and is electrically connected to the data monitoring device (4). An inner hole (52) is provided at the center of the electrode plate (5) on the side away from the base (22), and the center line of the inner hole (52) coincides with the axis of the base (22); The base (22) has a number of evenly spaced positioning posts (25) protruding along its circumference with the base (22) axis as the center on the side of the lubricating oil cavity (24). Each positioning post (25) has a positioning hole (26) that penetrates the base (22). Each positioning hole (26) has an electrode post (1) inserted into it, and the outer circumferential surface of the electrode post (1) is circumferentially sealed with the hole wall of the positioning hole (26). Two electrode plates (5) are fixed on different positioning posts (25) and welded to the electrode posts (1) on the positioning posts (25). All the positioning posts (25) can be divided into two groups and all the positioning posts (25) are distributed on the same circumference. The height of the positioning posts (25) in one group is greater than the height of the positioning posts (25) in the other group. The higher positioning posts (25) and the lower positioning posts (25) are arranged alternately. The positioning posts (25) of the lower group are fixed to the electrode plate (5) on the side closer to the base (22), and the positioning posts (25) of the higher group are fixed to the electrode plate (5) on the side away from the base (22).

2. The wheel hub lubricating oil monitoring system according to claim 1, characterized in that, The electrode plate (5) near the base (22) has several grooves (51) for avoiding the positioning posts (25) of the higher group. Each positioning post (25) of the higher group is respectively locked in the grooves (51) on the electrode plate (5), and the positioning post (25) in the opposite groove (51) limits the electrode plate (5).

3. The wheel hub lubricating oil monitoring system according to claim 1 or 2, characterized in that, The data monitoring device (4) includes an integrated circuit board (41), a data processor (42) and a power supply (43). The integrated circuit board (41) has a ring structure and the center line of the integrated circuit board (41) coincides with the axis of the hub (2). The data processor (42) is soldered on the integrated circuit board (41). The power supply (43) is electrically connected to the integrated circuit board (41) and the power supply (43) is fixed on the outer periphery of the base (22).

4. The wheel hub lubricating oil monitoring system according to claim 1 or 2, characterized in that, The data monitoring device (4) includes an integrated circuit board (41), a data processor (42), and a power supply (43), and the three are integrally formed.

5. The wheel hub lubricating oil monitoring system according to claim 4, characterized in that, One end of each electrode post (1) passes through the positioning hole (26) and extends into the mounting chamber (23) to be fixed to the integrated circuit board (41).

6. The wheel hub lubricating oil monitoring system according to claim 5, characterized in that, The data processor (42) and the power supply (43) are located on opposite sides of the axis of the hub (2).

7. The wheel hub lubricating oil monitoring system according to claim 6, characterized in that, The base (22) has a disc-shaped structure. A connecting part (27) protrudes circumferentially on the side of the base (22) near the lubricating oil cavity (24). The connecting part (27) is fixed to the hub end cover housing (3). An annular groove (28) is opened on the side of the base (22) away from the lubricating oil cavity (24). The integrated circuit board (41) is embedded in the annular groove (28) and the pressure cover (21) is fixed to the base (22) by bolts.

Images