Grease leakage prevention device for double-sealing-piece hub

Abstract

The utility model relates to the technical field of grease leakage prevention, and discloses a grease leakage prevention device for a double-sealing-piece hub, which comprises a hub local part, a gasket attached to the hub local part and used for component installation, a fastening screw in threaded connection with the gasket, a notch arranged on the hub local part, a first sealing piece slidably arranged in the notch on the hub local part, and a second sealing piece slidably arranged in the notch on the hub local part. Compared with a traditional single-sealing-piece or simple sealing mode, the double-sealing-piece structural design adopted by the device has the advantage that the qualitative leap in the sealing effect is achieved. The two sealing pieces work cooperatively, a more reliable sealing barrier is formed, and double challenges from internal grease pressure and external complex environmental factors can be effectively resisted. According to the sealing structure, grease can be reliably and firmly sealed in the hub under the action of centrifugal force generated by high-speed rotation or under the severe working conditions of damp, dust and corrosive media, and the risk of grease leakage is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of grease leakage prevention technology, specifically a grease leakage prevention device for a double-sealed wheel hub. Background Technology

[0002] In many mechanical devices, especially those involving wheel hubs, grease plays an indispensable role in the lubrication and normal operation of internal components. However, wheel hub seals often face the problem of grease leakage. From the perspective of the seals themselves, their materials gradually lose their original elasticity and sealing performance due to fatigue and aging during long-term use. For example, rubber seals, when subjected to high temperature, high pressure, and complex chemical environments for extended periods, suffer damage to their molecular structure, resulting in hardening and cracking, which prevents them from tightly fitting the wheel hub and journal, thus creating conditions for grease leakage.

[0003] During installation, improper operation can easily lead to grease leakage. Inexperienced installers or negligence can cause seals to be misaligned, deformed, or scratched. These improper operations will damage the integrity and sealing effect of the seals. Alternatively, if the clearance between the seals is too large or too small, the seals will not function properly. If the clearance is too large, grease will flow directly from the gap; if the clearance is too small, excessive pressure on the seals will damage them and cause grease leakage.

[0004] Grease leakage can cause a series of serious damages to the entire device. Internal components, lacking lubrication, experience increased friction. For example, in a wheel hub bearing, the wear between the balls and raceways increases rapidly, leading to increased bearing clearance, reduced rotational accuracy, and eventual failure. Gear teeth will also wear and deform due to dry friction, affecting transmission efficiency and accuracy; in severe cases, teeth may break, causing the entire transmission system to collapse. Simultaneously, leaked grease can contaminate other critical components, such as brake discs and pads in the braking system, reducing braking friction, significantly weakening braking performance, and increasing safety risks.

[0005] Despite the severity of the grease leakage problem, there is currently a lack of a device in the field of wheel hub sealing technology that specifically employs dual seals to effectively prevent grease leakage.

[0006] Therefore, we propose a double-seal wheel hub anti-grease leakage device to solve the above problems. Utility Model Content

[0007] (a) Technical problems to be solved

[0008] To address the shortcomings of existing technologies, this utility model provides a grease leakage prevention device for a double-seal wheel hub, thereby solving the problems mentioned in the background section.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, this utility model provides the following technical solution: a double-sealed wheel hub anti-grease leakage device, including a wheel hub portion, on which a gasket for component installation is attached, and a fastening screw is threaded onto the gasket. A notch is provided on the wheel hub portion, and a first sealing plate is slidably installed in the notch. An auxiliary plate is fixedly connected to the first sealing plate.

[0011] Preferably, a monitoring plate is fixedly connected to the side of the auxiliary plate away from the first sealing plate, and a hollow cavity is formed inside the monitoring plate, and a matrix thin-film pressure sensor is fixedly connected inside the hollow cavity.

[0012] Preferably, the monitoring plate is fixedly connected to a first partition plate and a second partition plate at equal intervals on the side away from the auxiliary plate, a sealing film is fixedly connected to the top of the first partition plate, and the end of the sealing film away from the first partition plate is fixedly connected to the top of the second partition plate.

[0013] Preferably, an annular support plate is fixedly connected to the side of the monitoring plate away from the auxiliary plate, a micro motor is fixedly connected to the annular support plate of the monitoring plate, a threaded column is fixedly connected to the output shaft of the micro motor, a hollow screw is threaded onto the threaded column, and an arc-shaped sealing plate is fixedly connected to the end of the hollow screw away from the threaded column.

[0014] Preferably, a second sealing sheet is fixedly connected to the annular support plate surface of the monitoring sheet.

[0015] Preferably, the diameter of the first sealing sheet and the monitoring sheet is the same, and the diameter of the auxiliary sheet is smaller than that of the first sealing sheet and the monitoring sheet.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a grease leakage prevention device for a double-seal wheel hub, which has the following features:

[0018] Beneficial effects:

[0019] 1. This utility model, through the design of the device, can effectively prevent grease leakage and has many significant beneficial effects, bringing great improvement and enhancement to mechanical devices involving wheel hubs in terms of operating performance, reliability, safety and maintenance costs;

[0020] Firstly, it boasts excellent sealing performance and grease retention:

[0021] The dual-seal structure design employed in this device represents a significant leap forward in sealing performance compared to traditional single-seal or simple sealing methods. The two seals work together to form a more reliable sealing barrier, effectively resisting the dual challenges of internal grease pressure and complex external environmental factors. Whether under the centrifugal force generated by high-speed rotation or in harsh conditions involving moisture, dust, or corrosive media, it reliably seals the grease firmly inside the hub, greatly reducing the risk of grease leakage and ensuring that the hub is always in a well-lubricated state. This provides a solid guarantee for the stable operation of the hub and its related components.

[0022] Secondly, it extends the service life of the wheel hub and related components, improving the overall operational stability and reliability of the device.

[0023] By effectively preventing grease leakage, the bearings, gears, and other key transmission components inside the wheel hub can continuously receive sufficient and stable grease lubrication. This allows the coefficient of friction between the components to remain at a stable low level, significantly reducing wear, scratches, and fatigue caused by poor lubrication. This greatly improves the reliability and durability of the gear transmission system, resulting in a significant extension of the overall service life of the entire wheel hub assembly. This improvement in stability and reliability is of great significance for increasing production efficiency, ensuring operational safety, and reducing operating costs, laying a solid foundation for the long-term stable operation of mechanical equipment.

[0024] 2. Based on the double sealing of grease, this utility model further improves the efficiency, cost control and maintenance convenience of wheel hub-related equipment by adopting the design of a first partition plate and a second partition plate to partition multiple arc-shaped sealing pieces.

[0025] Firstly, precise and efficient local sealing and improved overall stability:

[0026] The zoned sealing component structure allows for precise location of specific areas to effectively seal against the risk of localized grease leakage. Compared to traditional monolithic sealing structures, this approach significantly improves the targeted nature and effectiveness of the seal. Each zone's sealing component can be optimized and operate independently based on the specific operating conditions and pressure distribution of its area, ensuring that in the event of any abnormal grease pressure or slight leakage tendency, the corresponding sealing component can respond quickly and minimize the potential leakage.

[0027] Secondly, it significantly reduces maintenance costs and downtime:

[0028] Another significant advantage of zoned design is its ease of rapid replacement of damaged components. When a zone's seals are damaged or degraded due to prolonged use, accidental impact, or harsh environmental conditions, there's no need for extensive disassembly and replacement of the entire hub's sealing system; only the damaged component needs to be addressed individually. This greatly simplifies the maintenance process and reduces the manpower, resources, and time required for maintenance. Compared to traditional sealing structures, maintenance personnel can more quickly locate the fault and implement replacement, thus significantly reducing downtime caused by seal failures. Attached Figure Description

[0029] Figure 1 This is an external view of the device after installation.

[0030] Figure 2 This is an exploded view of the overall structure of this utility model;

[0031] Figure 3 This is a structural diagram of the monitoring plate after it has been cut open in this utility model;

[0032] Figure 4 This is a partial view of the main structure of this utility model;

[0033] Figure 5 This is a side view of the structure of this utility model;

[0034] Figure 6 This is a diagram showing the working state of this utility model when it is leak-proof.

[0035] In the picture:

[0036] 1. Hub section; 2. Gasket; 3. Fastening screw; 4. First sealing plate; 5. Auxiliary plate; 6. Monitoring plate; 7. Hollow cavity; 8. Matrix thin film pressure sensor; 9. First partition plate; 10. Second partition plate; 11. Sealing membrane; 12. Arc-shaped sealing plate; 13. Hollow screw; 14. Threaded column; 15. Micro motor; 16. Second sealing plate. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0039] Example

[0040] Please refer to Figures 1 to 6 As shown:

[0041] A double-seal wheel hub anti-grease leakage device includes a wheel hub portion 1, on which a gasket 2 for component installation is attached, and a fastening screw 3 is threaded onto the gasket 2. A notch is formed in the wheel hub portion 1, and a first sealing plate 4 is slidably installed within the notch. An auxiliary plate 5 is fixedly connected to the first sealing plate 4. A monitoring plate 6 is fixedly connected to the side of the auxiliary plate 5 away from the first sealing plate 4. A hollow cavity 7 is formed within the monitoring plate 6, and a matrix thin-film pressure sensor 8 is fixedly connected within the hollow cavity 7. First partition plates 9 are equidistantly fixed to the side of the monitoring plate 6 away from the auxiliary plate 5. The second partition plate 10 has a sealing membrane 11 fixedly connected to the top of the first partition plate 9. The end of the sealing membrane 11 away from the first partition plate 9 is fixedly connected to the top of the second partition plate 10. The side of the monitoring plate 6 away from the auxiliary plate 5 is fixedly connected to an annular support plate. A micro motor 15 is fixedly connected to the annular support plate of the monitoring plate 6. A threaded post 14 is fixedly connected to the output shaft of the micro motor 15. A hollow screw 13 is threaded onto the threaded post 14. An arc-shaped sealing sheet 12 is fixedly connected to the end of the hollow screw 13 away from the threaded post 14. A second sealing sheet 16 is fixedly connected to the surface of the annular support plate of the monitoring plate 6.

[0042] in:

[0043] The first sealing plate 4, the auxiliary plate 5, and the monitoring plate 6 are fixedly spliced ​​together to form an annular groove. Since the diameters of the first sealing plate 4 and the monitoring plate 6 are the same, and the diameter of the auxiliary plate 5 is slightly smaller, after the grease leaks from the first sealing plate 4, the grease will reach the annular groove, that is, contact the outer ring surface of the auxiliary plate 5. As the grease gradually increases, the grease will push the monitoring plate 6 on one side, thereby completing the grease leakage early warning monitoring.

[0044] The working principle of a matrix piezoresistive array sensor: Based on the piezoresistive effect, it utilizes the piezoresistive effect of semiconductor materials. When a semiconductor is subjected to pressure, its internal crystal structure changes, leading to a change in resistivity and thus a change in resistance. In a matrix piezoresistive array sensor, each sensor unit uses this principle to sense pressure. Structural characteristics: Array layout, consisting of multiple identical piezoresistive sensor units arranged in a two-dimensional matrix according to a specific row and column pattern. Common array sizes include 2×2, 3×3, and 4×4. For example, a 4×4 matrix thin-film sensor array contains sixteen sensor nodes, enabling the measurement of pressure distribution within a certain area.

[0045] The first partition plate 9 and the second partition plate 10 work together to guide the movement of the arc-shaped sealing sheet 12.

[0046] Initially, the sealing membrane 11 is used to protect the arc-shaped sealing sheet 12 from external substances that reduce its lifespan; when the arc-shaped sealing sheet 12 is in operation, the sealing membrane 11 will be ruptured.

[0047] When the threaded column 14 rotates, the hollow screw 13 on the arc-shaped sealing plate 12 will not move because it is restricted by the first partition plate 9 and the second partition plate 10. The arc-shaped sealing plate 12 will only move outward during the rotation of the threaded column 14.

[0048] The micro motor 15 is mainly used to drive the threaded column 14 to rotate.

[0049] Working principle:

[0050] In the initial state:

[0051] The monitoring piece 6 did not deform under the action of leaked grease, the auxiliary piece 5 was in a non-working state. Because the monitoring piece 6 did not deform, the matrix thin film pressure sensor 8 was in a non-working state and was not subjected to local stress, and the sealing film 11 did not rupture.

[0052] During use, if grease leakage occurs in wheel hub section 1 after the seal is installed, please refer to the attached document. Figure 3 and appendix Figure 4 Since the first sealing plate 4, auxiliary plate 5, and monitoring plate 6 are fixedly spliced ​​together, they will form an annular groove. Since the diameter of the first sealing plate 4 and the monitoring plate 6 are the same, and the diameter of the auxiliary plate 5 is slightly smaller, after the grease leaks from the first sealing plate 4, the grease will reach the annular groove, that is, contact the outer ring surface of the auxiliary plate 5. As the grease gradually increases, the grease will push the monitoring plate 6 on one side. During the above process, when the monitoring plate 6 is deformed, the matrix thin film pressure sensor 8 set in the monitoring plate 6 will be subjected to pressure, thereby indirectly indicating that the monitoring plate 6 is in a grease leakage state. At this time, the micro motor 15 that has an electrical connection with the matrix thin film pressure sensor 8 will start.

[0053] Furthermore, as the micro motor 15 rotates the threaded column 14, the hollow screw 13 on the arc-shaped sealing plate 12 will not move because it is known that the arc-shaped sealing plate 12 is restricted by the first partition plate 9 and the second partition plate 10. It will only move the arc-shaped sealing plate 12 outward during the rotation of the threaded column 14. That is, the arc-shaped sealing plate 12 will move towards the position of the sealing film 11 and eventually break through the sealing film 11 to form a sealing ring on the basis of the second sealing plate 16. This sealing ring is composed of multiple arc-shaped sealing plates 12.

[0054] Furthermore, the device's design effectively prevents grease leakage, offering numerous significant benefits and greatly improving the performance, reliability, safety, and maintenance costs of mechanical devices involving wheel hubs. Firstly, it boasts superior sealing performance and grease retention: the dual-seal structure design of this device represents a qualitative leap in sealing performance compared to traditional single-seal or simple sealing methods. The two seals work together to form a more reliable sealing barrier, effectively resisting the dual challenges of internal grease pressure and complex external environmental factors. Whether under the centrifugal force generated by high-speed rotation or in harsh conditions such as humidity, dust, or corrosive media, it reliably seals the grease firmly inside the wheel hub, greatly reducing the risk of grease leakage and ensuring that the wheel hub is always in a good lubricated state, providing a solid guarantee for the stable operation of the wheel hub and its related components.

[0055] Secondly, it extends the service life of the hub and related components, and improves the overall operational stability and reliability of the device: By effectively preventing grease leakage, the bearings, gears, and other key transmission components inside the hub can continuously receive sufficient and stable grease lubrication. This allows the coefficient of friction between the components to remain at a stable low level, significantly reducing wear, scratches, and fatigue caused by poor lubrication. This greatly improves the reliability and durability of the gear transmission system, resulting in a significant extension of the overall service life of the entire hub assembly. This improvement in stability and reliability is of great significance for increasing production efficiency, ensuring operational safety, and reducing operating costs, laying a solid foundation for the long-term stable operation of mechanical equipment.

[0056] Furthermore, based on the double sealing of grease, the design of multiple arc-shaped sealing plates 12, using a first partition plate 9 and a second partition plate 10, further brings many significant benefits, providing strong support for the efficient operation, cost control, and maintenance convenience of wheel hub-related equipment. Firstly, precise and efficient local sealing and improved overall stability: The partitioned sealing component structure allows for precise location of the corresponding area and effective sealing by specialized local components when facing the risk of local grease leakage. Compared to traditional integral sealing structures, this method greatly improves the targeting and effectiveness of the seal. Each partition's sealing component can be optimized and operate independently according to the specific working conditions and pressure distribution of its area, ensuring that in the event of any abnormal grease pressure or slight leakage tendency in any local area, the corresponding sealing component can respond quickly and control the leakage risk to a minimum.

[0057] Secondly, significantly reduced maintenance costs and downtime: Another major advantage of zoned design is its ease of rapid replacement of damaged components. When the sealing components of a particular zone are damaged or degraded due to prolonged use, accidental impact, or harsh environmental conditions, there is no need for large-scale disassembly and replacement of the entire hub's sealing system; only the damaged component needs to be addressed individually. This greatly simplifies the maintenance process and reduces the manpower, resources, and time required for maintenance. Compared to traditional sealing structures, maintenance personnel can more quickly locate the fault and implement replacement, thereby significantly reducing downtime caused by sealing component failures.

[0058] Please refer to the above work process. Figures 1 to 6 .

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preventing grease leakage from a double-sealed wheel hub, comprising a portion (1) of the wheel hub, characterized in that: A gasket (2) for component installation is attached to the hub portion (1), and a fastening screw (3) is threaded onto the gasket (2). A notch is provided on the hub portion (1), and a first sealing plate (4) is slidably installed in the notch on the hub portion (1). An auxiliary plate (5) is fixedly connected to the first sealing plate (4).

2. The anti-grease leakage device for a double-seal wheel hub according to claim 1, characterized in that: A monitoring plate (6) is fixedly connected to the side of the auxiliary plate (5) away from the first sealing plate (4). A hollow cavity (7) is opened inside the monitoring plate (6), and a matrix thin film pressure sensor (8) is fixedly connected inside the hollow cavity (7).

3. The anti-grease leakage device for a double-seal wheel hub according to claim 2, characterized in that: The monitoring plate (6) is fixedly connected at equal intervals to the side away from the auxiliary plate (5) with a first partition plate (9) and a second partition plate (10). A sealing film (11) is fixedly connected to the top of the first partition plate (9), and the end of the sealing film (11) away from the first partition plate (9) is fixedly connected to the top of the second partition plate (10).

4. The anti-grease leakage device for a double-seal wheel hub according to claim 3, characterized in that: The monitoring plate (6) is fixedly connected to an annular support plate on the side away from the auxiliary plate (5). A micro motor (15) is fixedly connected to the annular support plate of the monitoring plate (6). A threaded column (14) is fixedly connected to the output shaft of the micro motor (15). A hollow screw (13) is threaded onto the threaded column (14). An arc-shaped sealing plate (12) is fixedly connected to the end of the hollow screw (13) away from the threaded column (14).

5. The anti-grease leakage device for a double-seal wheel hub according to claim 4, characterized in that: The monitoring plate (6) has a second sealing plate (16) fixedly connected to the annular support plate surface.

6. The anti-grease leakage device for a double-seal wheel hub according to claim 2, characterized in that: The diameter of the first sealing piece (4) is the same as that of the monitoring piece (6), and the diameter of the auxiliary piece (5) is smaller than that of the first sealing piece (4) and the monitoring piece (6).

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