A long-life tapered roller bearing

Abstract

This utility model discloses a long-life tapered roller bearing, relating to the field of mechanical transmission technology. The bearing includes a bearing base and a bearing top cover. The base has a support tapered groove for supporting the tapered rollers. At the bottom of the support tapered groove is an annular waste residue groove that collects and isolates wear-generated particles, preventing abrasive wear. The bearing base also has a spiral oil outlet groove, which works in conjunction with a sealing plug with an oil reservoir located within a through-hole to create a sustainable lubrication system, ensuring sufficient lubrication in the raceway contact area. This utility model, through its two core designs of waste residue collection and self-circulating lubrication, effectively solves the problem of early failure in traditional bearings caused by grease migration and wear debris accumulation, significantly improving the bearing's wear resistance and service life.

Description

Technical Field

[0001] This utility model relates to the field of tapered roller bearing technology, and in particular to a long-life tapered roller bearing. Background Technology

[0002] Tapered roller bearings, as a key mechanical component capable of simultaneously withstanding radial and axial loads, are widely used in rotating mechanisms in industries such as automobiles, machine tools, mining machinery, and heavy transportation equipment. Their performance and reliability directly affect the accuracy, efficiency, and lifespan of the entire transmission system. Traditional tapered roller bearings face significant challenges of lubrication and wear failure under complex operating conditions and long-term operation, limiting further improvements in their service life.

[0003] Currently, existing tapered roller bearings typically consist of an inner ring, an outer ring, rolling elements, and a cage, relying on an external lubrication system or grease filling for lubrication. Common practices include providing grease holes in the bearing housing or end cap, or filling with grease during assembly. However, this method has significant drawbacks: First, the grease is prone to migration and shedding under the centrifugal force generated by the bearing's high-speed operation, leading to insufficient lubrication in the contact area between the rollers and raceways, resulting in increased frictional temperature rise and scuffing wear. Second, metal particles and deteriorated grease residue generated during wear cannot be effectively discharged, accumulating inside the raceways as abrasives and accelerating abrasive wear between the rollers and raceways. Utility Model Content

[0004] The purpose of this invention is to provide a long-life tapered roller bearing that overcomes the shortcomings of existing technologies.

[0005] To achieve the above objectives, a long-life tapered roller bearing is provided, including a bearing base and a bearing top cover. The upper side wall of the bearing base is provided with a support tapered groove, and a plurality of tapered roller bodies are provided inside the support tapered groove. A waste residue groove is provided inside the bearing base, and the waste residue groove is connected to the bottom of the support tapered groove.

[0006] The upper sidewall of the tapered roller body inside the bearing base fits against the lower sidewall of the bearing top cover. The bearing base has an oil outlet groove inside and a lower through hole inside. The upper sidewall of the bearing top cover has an upper through hole.

[0007] According to the aforementioned long-life tapered roller bearing, the oil outlet groove is spiral-shaped and extends through the lower sidewall of the bearing base.

[0008] According to the aforementioned long-life tapered roller bearing, a lower sealing plug is installed inside the lower through hole, and an oil reservoir is provided on the upper side wall of the lower sealing plug.

[0009] According to the aforementioned long-life tapered roller bearing, an upper sealing plug is installed inside the upper through hole, and an oil storage groove is provided on the lower side wall of the upper sealing plug.

[0010] According to the aforementioned long-life tapered roller bearing, the lower sidewall of the bearing base is tapered.

[0011] According to the aforementioned long-life tapered roller bearing, the waste residue trough and the tapered roller body are provided with a fitting clearance to facilitate waste residue discharge.

[0012] According to the aforementioned long-life tapered roller bearing, the upper inner wall of the bearing base and the lower side wall of the bearing top cover are coated with a wear-resistant coating to improve wear resistance.

[0013] According to the aforementioned long-life tapered roller bearing, the tapered roller body is used to support the tapered groove and the lower side wall of the bearing top cover being tangent.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model effectively solves the key problem of abrasive wear leading to early bearing failure by setting up a unique waste slag collection and discharge structure. Specifically, the annular waste slag groove located at the bottom of the support cone groove has a fitting clearance with the roller body. During bearing operation, it can efficiently collect harmful particles such as metal shavings and hardened lubricating grease generated by friction and isolate them from the main raceway. This design fundamentally avoids waste slag circulating and participating in crushing and sliding within the raceway, significantly reducing abrasive wear and scratches on the roller and raceway surfaces, thereby greatly delaying fatigue spalling caused by surface damage in the bearing and providing a core guarantee for extending the service life of the bearing under harsh working conditions.

[0016] 2. This utility model innovatively constructs an integrated and sustainable lubrication system, overcoming the problems of easy migration and detachment of traditional bearing grease and poor lubrication in the contact area. The spiral oil outlet groove guides the grease to establish a more stable oil film pressure and promotes its distribution, while the oil reservoir / accumulator set in the upper and lower sealing plugs constitutes a miniature oil reservoir, enabling slow release and continuous replenishment of lubricating oil. The two work together to ensure that even under the action of centrifugal force at high speed, the core contact area between the roller and the raceway can always receive sufficient and uniform lubrication, effectively reducing the coefficient of friction and operating temperature, and fundamentally inhibiting adhesive wear and overheating failure caused by lubrication failure. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a structural schematic diagram of a long-life tapered roller bearing according to the present invention;

[0019] Figure 2 This is a bottom schematic diagram of a long-life tapered roller bearing according to this utility model;

[0020] Figure 3 This is a cross-sectional schematic diagram of a long-life tapered roller bearing according to the present invention;

[0021] Figure 4 This is a front view of a long-life tapered roller bearing according to the present invention.

[0022] Legend:

[0023] 1. Bearing base; 101. Lower through hole; 102. Oil outlet groove; 103. Support tapered groove; 104. Waste residue groove; 105. Lower sealing plug; 2. Bearing top cover; 201. Upper through hole; 202. Upper sealing plug; 3. Tapered roller body. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] Reference Figure 1-4 This utility model discloses a long-life tapered roller bearing, which mainly consists of a bearing base 1, a bearing top cover 2, and tapered roller bodies 3 disposed between the two. An annular support tapered groove 103 is machined inside the upper sidewall of the bearing base 1. The inclination angle of the support tapered groove 103 matches the cone angle of the tapered roller body 3, for precisely bearing and guiding the rolling of the tapered roller body 3. Several tapered roller bodies 3 are arranged circumferentially within the support tapered groove 103, typically held evenly apart by cages (not shown in the figure, a conventional design in the art).

[0026] The bearing base 1 also has a waste residue groove 104 inside, which is located at the bottom of the support tapered groove 103 and connected to it. A clearance is provided between the waste residue groove 104 and the bottom of the tapered roller body 3. The purpose of this structure is that waste residue such as metal shavings and deteriorated grease particles generated during bearing operation will fall into the waste residue groove 104 and be collected under the action of gravity and the flow of lubricating oil. This prevents waste residue from circulating in the raceway and causing secondary wear on the tapered roller body 3 and raceway surface, which is one of the key design features for improving bearing life.

[0027] The bearing base 1 has an oil outlet groove 102 machined inside. In this embodiment, the oil outlet groove 102 is preferably spiral-shaped, and its channel penetrates the lower sidewall of the bearing base 1. The spiral design increases the flow path of lubricating oil and better establishes lubrication pressure. The bearing base 1 also has a lower through hole 101 at its center, and a lower sealing plug 105 is installed inside the lower through hole 101. The upper sidewall of the lower sealing plug 105 is designed with a recess to form an oil reservoir. Similarly, an upper through hole 201 is provided at the center of the upper sidewall of the bearing top cover 2, and an upper sealing plug 202 is installed inside it. The lower sidewall of the upper sealing plug 202 is also designed with a recess to form an oil storage groove. The upper sealing plug 202 and the lower sealing plug 105 are usually made of rubber or soft plastic, which can seal to prevent grease leakage, and the oil reservoir / oil storage groove on them can store a small amount of grease to achieve the effect of slow release and continuous lubrication.

[0028] As a further optimization of this invention, a wear-resistant coating (such as a DLC diamond-like carbon coating, a ceramic coating, or a high-performance composite coating) is applied to the upper inner wall of the bearing base 1 (i.e., the raceway in contact with the tapered roller body 3) and the lower side wall of the bearing top cover 2 (i.e., the upper raceway). This coating can significantly improve the hardness of the raceway surface and reduce the coefficient of friction, thereby greatly enhancing wear resistance and fatigue resistance.

[0029] The upper end of the tapered roller body 3 is in contact with the lower side wall of the bearing top cover 2, and its lower end is in contact with the support tapered groove 103. The conical surface of the tapered roller body 3 is tangent to the support tapered groove 103 and the lower side wall of the bearing top cover 2, respectively, forming a complete rolling friction pair.

[0030] Working Principle: When the bearing is installed on the equipment and begins operation, the tapered roller body 3 rolls between the supporting tapered groove 103 and the bearing top cover 2. Initial lubrication can be achieved by unscrewing the upper sealing plug 202 or the lower sealing plug 105 and injecting grease through the through hole. After the grease fills the system, part of it is stored in the oil grooves of the upper and lower sealing plugs, while the other part flows under the centrifugal force and heat generated by the bearing operation. The spiral oil outlet groove 102 helps guide and distribute the lubricating oil film. The wear debris generated falls into the debris groove 104 at the bottom and is collected to prevent it from participating in cyclic wear. The wear-resistant coating on the surface directly resists contact stress and delays fatigue spalling. Through the synergistic effect of debris collection, continuous lubrication, and wear-resistant protection, this invention effectively solves several core problems that lead to early bearing failure, thereby significantly extending the bearing's service life.

[0031] Unless otherwise specified, the constituent units of this utility model are obtained from conventional commercial channels or manufactured by conventional methods. Their specific structure, working principle, and possible control methods and spatial arrangement methods can adopt conventional choices in the field and should not be regarded as the innovation of this utility model. This is understandable to those skilled in the art, and this utility model patent will not be further elaborated in detail.

[0032] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A long-life tapered roller bearing, characterized in that, The bearing includes a bearing base (1) and a bearing top cover (2). The bearing base (1) has a support cone groove (103) inside its upper side wall. The support cone groove (103) has several conical roller bodies (3) inside its interior. The bearing base (1) has a waste slag groove (104) inside its interior. The waste slag groove (104) is connected to the bottom of the support cone groove (103). The upper side wall of the tapered roller body (3) inside the bearing base (1) is in contact with the lower side wall of the bearing top cover (2). The bearing base (1) has an oil groove (102) inside. The bearing base (1) has a lower through hole (101) inside. The bearing top cover (2) has an upper through hole (201) on its upper side wall.

2. The long-life tapered roller bearing according to claim 1, characterized in that, The oil outlet groove (102) is spiral-shaped and extends through the lower side wall of the bearing base (1).

3. A long-life tapered roller bearing according to claim 1, characterized in that, The lower through hole (101) is equipped with a lower sealing plug (105), and the upper side wall of the lower sealing plug (105) is provided with an oil storage groove.

4. A long-life tapered roller bearing according to claim 1, characterized in that, An upper sealing plug (202) is installed inside the upper through hole (201), and an oil storage groove is provided on the lower side wall of the upper sealing plug (202).

5. A long-life tapered roller bearing according to claim 1, characterized in that, The lower side wall of the bearing base (1) is conical.

6. A long-life tapered roller bearing according to claim 1, characterized in that, The waste residue trough (104) and the conical roller body (3) are provided with a fitting clearance.

7. A long-life tapered roller bearing according to claim 1, characterized in that, The upper inner wall of the bearing base (1) and the lower side wall of the bearing top cover (2) are coated with a wear-resistant coating.

8. A long-life tapered roller bearing according to claim 1, characterized in that, The tapered roller body (3) is used to support the tapered groove (103) and the lower side wall of the bearing top cover (2).

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