Plastic oil self-lubricating maintenance-free axle bearing

Abstract

The utility model discloses a plastic oil self-lubricating maintenance-free axle bearing which comprises an outer ring, a rolling body, an inner ring and plastic oil, the rolling body is arranged between the inner ring and the outer ring, the plastic oil is in contact with the rolling body and is used for lubricating the rolling body, the utility model provides the novel self-lubricating maintenance-free axle bearing, and the plastic oil formed by an oil-saturated polymer matrix is used as a lubricating medium of the axle bearing; the lubricating oil can stably run in high-load, high-dust, high-temperature and low-temperature environments, and a lubricating film is autonomously formed in the running process, so that the maintenance frequency is reduced, the friction loss is reduced, the wear resistance is enhanced, and even the lubricating oil is maintenance-free. And the solid plastic oil is not easy to leak, so that the risk of environmental pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the fields of transportation industry such as automobiles, agricultural machinery, engineering machinery, special vehicles and forklift material handling equipment, and in particular to an axle bearing with long-lasting self-lubricating performance. The utility model adopts plastic oil composed of an oil-saturated polymer matrix for lubrication, and is used to solve the problems of difficult lubrication, accelerated wear and reduced durability of existing axle bearings. Background Art

[0002] Axle bearings are important components in vehicle axles. They bear the vehicle's load, transmit driving and braking forces, and simultaneously support the rotation of the wheels. The lubrication performance of axle bearings directly affects the vehicle's driving safety and comfort. In various transportation industries, axle bearings are often exposed to harsh working environments such as high and low temperatures, high loads, high dust levels, and frequent vibrations, making it more difficult to select the right lubricant. Traditional axle bearing lubrication methods mainly include:

[0003] 1. Use grease lubrication. In high-temperature environments, ordinary grease may melt and flow away, while low temperatures may cause the grease to harden, affecting the lubrication effect. Grease also produces a large friction torque during equipment startup, increasing the load on the engine (or motor). Furthermore, the complex structure of the axle makes grease replacement very difficult.

[0004] 2. Oil lubrication. This lubrication method requires a dedicated oil system to deliver the lubricating oil to the bearing. The system is complex, requires additional oil lines and sealing devices, is costly, and is difficult to install and maintain.

[0005] 3. Splash lubrication. This lubrication method fills the bearing with lubricating oil and uses a seal to prevent oil leakage and external contaminants from entering. This lubrication method has a high initial cost, and the seals require regular inspection and maintenance. Refilling the lubricating oil is difficult, increasing labor costs.

[0006] 4. Drip lubrication. This type of lubrication is suitable for bearings under low speed and light load conditions, but not suitable for high speed or heavy load conditions. It is difficult to achieve uniform and continuous lubrication and is prone to problems such as insufficient or excessive oil supply.

[0007] In order to improve the service life and reliability of axle bearings, it is particularly important to develop a new type of axle bearing that can provide continuous and uniform lubrication, withstand high and low temperatures, high loads, high dust, and has low cost. Utility Model Content

[0008] In response to the shortcomings of the existing technology, the utility model provides a new type of self-lubricating maintenance-free axle bearing, which uses plastic oil composed of an oil-saturated polymer matrix as a lubricating medium; it can operate stably in high and low temperature, high load and high dust environments, and independently form a lubricating film during operation, thereby reducing maintenance frequency, reducing friction loss, and enhancing wear resistance, thereby achieving maintenance-free and long-lasting lubrication.

[0009] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0010] A plastic oil self-lubricating maintenance-free axle bearing comprises: an outer ring, rolling elements, an inner ring, and plastic oil; the plastic oil is filled between the inner ring and the outer ring, and the plastic oil coats the rolling elements and rotates together with the rolling elements; it has the functions of self-lubrication, leakage prevention, and maintenance-free. The axle bearing can operate stably in high-load, high-dust, high- and low-temperature environments, and can autonomously form a lubricating film during operation, thereby reducing maintenance frequency, reducing friction loss, enhancing wear resistance, and even being maintenance-free.

[0011] Further preferably, the plastic oil is filled between the inner ring and the outer ring, the plastic oil is coated on the rolling element, or is embedded in the pit of the inner ring, which plays the role of self-lubrication, leakage prevention and maintenance-free.

[0012] Further preferably, the outer ring is fixed in the housing to provide a stable external support surface to bear external radial and axial loads, the outer ring is cylindrical, and the outer ring of the spherical plain bearing is made of high-strength fiber composite material;

[0013] Further preferably, the rolling elements are rolling components located between the outer ring and the inner ring, which are responsible for transmitting the load, and the rolling elements are cylindrical rollers and tapered roller structures; the rolling elements can be separated by cages, or a circumferentially filled type can be used without a cage;

[0014] Further preferably, the inner ring, which is the part that cooperates with the shaft and bears the internal radial and axial loads, is cylindrical or spherical;

[0015] Further preferably, the plastic oil is filled in the gap between the outer ring and the inner ring, coated on the rolling element, and rotates together with the rolling element, utilizing the self-lubricating property of the plastic oil material to reduce friction, improve load-bearing capacity, and avoid the problem of leakage of lubricating oil and grease;

[0016] Further preferably, the plastic oil is a high molecular polymer material with special lubricating properties, which has saturated lubricating oil adsorbed inside. During operation, the lubricating oil moves to the surface of the friction pair under the action of capillary action to form a lubricating oil film, and when the operation stops, the lubricating oil will be re-adsorbed into the polymer and stored.

[0017] More preferably, the plasticizer oil is composed of a polymer such as polyethylene (PE), ultra-high molecular weight polyethylene (UHMWPE), polyimide, or PEEK as a base material, mixed with lubricating oil and additives to form a viscous fluid lubricating medium. This lubricant is injected into the bearing via injection molding, compression molding, vulcanization, or other methods, and then heated and solidified to form a porous, oil-containing lubricating material. These micropores can accommodate the lubricating oil, which is retained within the material by surface tension. The lubricant provides excellent lubrication for the bearing and effectively seals the bearing cavity by completely filling it.

[0018] The utility model has the following beneficial effects:

[0019] Superior performance: It exhibits stable lubrication performance in various extreme environments (such as high temperature, low temperature, dust, etc.), significantly improving the operating stability and durability of axle bearings.

[0020] Environmental protection and safety: The solid form is not easy to leak, reducing the risk of environmental pollution.

[0021] Low friction and wear: Plastic oil can form a lubricating film on its own, reducing friction and wear between moving parts.

[0022] Maintenance-free: The axle bearings are maintenance-free, reducing the user's use and maintenance costs.

[0023] The utility model utilizes the efficient lubrication characteristics of plastic oil to significantly improve the stability and durability of axle bearing operation, reduce equipment failures caused by poor lubrication, thereby improving production efficiency and reducing maintenance costs, demonstrating the creativity and practicality of the utility model in the field of axle bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of the maintenance-free axle tapered roller bearing filled with plastic oil;

[0025] Figure 2 Schematic front view of the structure for filling plastic oil for maintenance-free axle tapered roller bearing structure;

[0026] Figure 3 Schematic diagram of the structure of maintenance-free axle needle roller bearing filled with plastic oil;

[0027] Figure 4 Schematic diagram of the structure for filling plastic oil for maintenance-free axle joint bearing structure;

[0028] The following is a list of reference numerals:

[0029] 1. Outer ring; 2. Rolling element; 3. Inner ring; 4. Cage; 5. Plastic oil; DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and relevant knowledge, and described clearly and completely. Obviously, the applications described are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] The present invention will be described in further detail below with reference to the accompanying drawings.

[0032] In the transportation industry, axle bearings, as crucial components in vehicle axles, are crucial for ensuring efficient and reliable axle operation. Selecting and maintaining high-quality axle bearings is crucial for improving axle reliability, extending axle life, and reducing operating costs. Traditional axle bearing lubrication methods include grease lubrication, oil lubrication, splash lubrication, and drip lubrication. Axle bearings using these lubrication methods suffer from short service life, poor reliability, inability to withstand high and low temperatures, lack of dust protection, and high cost. The present utility model provides a new type of self-lubricating, maintenance-free axle bearing that uses a plastic oil composed of an oil-saturated polymer matrix as a lubricating medium. The bearing is capable of stable operation under high loads, high dust levels, and high and low temperature environments, autonomously forming a lubricating film during operation, thereby reducing maintenance frequency, minimizing friction losses, enhancing wear resistance, and even eliminating maintenance. Solid plastic oil is less prone to leakage, reducing the risk of environmental pollution.

[0033] In order to solve the above problems, the present invention proposes a plastic oil self-lubricating maintenance-free axle bearing, and specifically provides the following embodiments; Example 1

[0034] A plastic oil self-lubricating maintenance-free axle bearing, which has a tapered roller bearing structure and includes: an outer ring 1, rolling elements 2, a retaining frame 4, an inner ring 3 and plastic oil 5; the plastic oil 5 is filled between the inner ring 3 and the outer ring 1, and the plastic oil 5 is coated on the rolling elements 2 and rotates together with the rolling elements; it has the functions of self-lubrication, leakage prevention and maintenance-free.

[0035] In this example, see the attached Figure 1 and attached Figure 2The outer ring 1 of the axle bearing is cylindrical, its outer surface mates with the bore of the bearing body. The rolling elements 2 are tapered rollers. The tapered rollers are separated by a retainer 4 or arranged in a full circumferential row. The inner ring 3 is cylindrical, its inner surface mates with the shaft. The gap between the outer ring 1 and inner ring 3 of the axle bearing is filled with plastic oil 5. The plastic oil is made from a polymer base material such as polyethylene (PE), ultra-high molecular weight polyethylene (UHMWPE), polyimide, or PEEK. It is mixed with lubricating oil and additives to form a viscous fluid-like lubricating medium. After being injected into the bearing through injection molding, compression molding, vulcanization, and other methods, it is heated and solidified to form a porous, oil-containing lubricating material. These micropores can accommodate the lubricating oil, which is retained in the material by surface tension. The lubricant provides excellent lubrication for the bearing and acts as an extremely effective seal by completely filling the bearing cavity.

[0036] Example 2

[0037] A plastic oil self-lubricating maintenance-free axle bearing, which has a needle roller bearing structure and includes: an outer ring 1, rolling elements 2, an inner ring 3, a retaining frame 4, and plastic oil 5; the plastic oil is filled between the inner ring and the outer ring, and the plastic oil coats the rolling elements and rotates with the rolling elements; it has the functions of self-lubrication, leakage prevention, and maintenance-free.

[0038] In this example, see the attached Figure 2 The outer ring 1 of the axle bearing is cylindrical, its outer surface fitting into the bore of the bearing body. The rolling elements 2 are cylindrical rollers separated by a cage 4 or arranged in a full circumferential row. Its inner surface fits into the shaft, and the gap between the outer ring 1 and inner ring 3 of the axle is filled with plastic oil 5. The plastic oil is made from a polymer matrix such as polyethylene (PE), ultra-high molecular weight polyethylene (UHMWPE), polyimide, or PEEK, mixed with lubricating oil and additives to form a viscous, fluid-like lubricating medium. This is injected into the bearing through injection molding, compression molding, vulcanization, and then heated and cured to form a porous, oil-containing lubricating material. These micropores can accommodate the lubricating oil, which is retained within the material by surface tension. The lubricant provides excellent lubrication for the bearing and acts as an extremely effective seal by completely filling the bearing cavity.

[0039] Example 3

[0040] A plastic oil self-lubricating maintenance-free axle bearing, which has a spherical joint bearing structure and includes: an outer ring 1, an inner ring 3, and plastic oil 5; the outer ring is made of high-strength fiber composite material, and the plastic oil is filled in the pits on the outer spherical surface of the inner ring and cooperates with the inner spherical surface of the outer ring. The plastic oil plays the role of self-lubrication, leakage prevention, and maintenance-free.

[0041] In this example, see the attached Figure 3The outer ring 1 of the axle bearing is cylindrical on the outside and spherical on the inside. Its outer cylinder mates with the main body hole. The outer ring 1 is made of high-strength fiber composite material. The inner ring 3 is cylindrical on the inside and spherical on the outside. Its inner cylinder mates with the shaft. Cylindrical holes are evenly distributed on the outer spherical surface of the inner ring 3 of the axle bearing. These cylindrical holes are filled with plastic oil 5. The plastic oil is made of a polymer such as polyethylene (PE), ultra-high molecular weight polyethylene, polyimide, or PEEK as a base material. It is mixed with lubricating oil and additives to form a viscous fluid-like lubricating medium. After being injected into the bearing through injection molding, molding, vulcanization, etc., it is heated and solidified to form a porous oil-containing lubricating material. These micropores can accommodate the lubricating oil and retain it in the material through surface tension. The lubricant provides excellent lubrication for the bearing and acts as an extremely effective seal by completely filling the bearing cavity.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] Superior performance: It exhibits stable lubrication performance in various extreme environments (such as high temperature, low temperature, dusty environments, etc.), significantly improving equipment operation stability and durability.

[0044] Environmental protection and safety: The solid form is not easy to leak, reducing the risk of environmental pollution.

[0045] Low friction and wear: Plastic oil can form a lubricating film on its own, reducing friction and wear between moving parts.

[0046] Maintenance-free: The axle bearings are maintenance-free, reducing the user's use and maintenance costs.

[0047] The utility model utilizes the efficient lubrication characteristics of plastic oil to significantly improve the stability and durability of axle bearing operation, reduce equipment failures caused by poor lubrication, thereby improving production efficiency and reducing maintenance costs, demonstrating the creativity and practicality of the utility model in the field of axle bearings.

[0048] Although some 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and all of these changes, modifications, substitutions and variations should fall within the scope of the present invention.

Claims

1. A plastic oil self-lubricating maintenance-free axle bearing, characterized in that: include: Outer ring, rolling element, inner ring, plastic oil; the rolling element is between the inner ring and the outer ring, the plastic oil is in contact with the rolling element and is used for lubricating the rolling element, and also includes a retaining frame for stabilizing the rolling element, and the plastic oil is coated around the rolling element or in the inner ring pit.

2. The plastic oil self-lubricating maintenance-free axle bearing according to claim 1, characterized in that: The outer ring is a cylindrical structure made of high-strength fiber composite material.

3. The plastic oil self-lubricating maintenance-free axle bearing according to claim 1, characterized in that: The rolling elements are tapered rollers or needle rollers, and the rolling elements are separated by cages or without cages.

4. The plastic oil self-lubricating maintenance-free axle bearing according to claim 1, characterized in that: The inner ring is cylindrical or spherical.

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