A type of sealed tapered roller bearing
By designing a sealed tapered roller bearing and using components such as an inner ring, outer ring, cage, O-ring seal, and sealing rubber, the sealing and lubrication problems of tapered roller bearings are solved, achieving waterproof, dustproof, and maintenance-free performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU EDISON BEARING MANUFACTURING CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-03
AI Technical Summary
Existing tapered roller bearings suffer from problems such as complex oil lubrication circuits and poor sealing, easy contamination of grease lubrication, and a decline in conventional sealing performance over time.
A sealed tapered roller bearing was designed, consisting of an inner ring, an outer ring, a cage, tapered roller bodies, an O-ring, a sealing skeleton, sealing rubber, and a spring. The sealing rubber provides a constant contact force through contact with the inner ring, and the sealing is achieved by the fit between the irregularly shaped skeleton and the bearing housing. The inner ring is filled with grease to achieve maintenance-free operation.
It achieves waterproof and dustproof bearings, prevents grease leakage, extends bearing service life, simplifies processing and assembly, and achieves maintenance-free operation.
Smart Images
Figure CN224453428U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bearings, and in particular to a sealed tapered roller bearing. Background Technology
[0002] Tapered roller bearings are typically open-type bearings, which can be lubricated by oil or grease. Oil lubrication involves complex oil circuitry and requires a high degree of overall system sealing, and often results in oil leakage. Grease lubrication, on the other hand, can lead to grease contamination if the bearing is not clean enough, thus shortening the bearing's lifespan.
[0003] Conventional sealed tapered roller bearings suffer from problems such as complex machining and assembly processes, and decreased sealing performance over time. To simplify the system structure, improve the bearing's waterproof and dustproof performance, and achieve maintenance-free operation, a sealed tapered roller bearing has been invented. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sealed tapered roller bearing.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sealed tapered roller bearing, comprising an inner ring, an outer ring, a cage, and tapered roller bodies. The inner ring is composed of two rings assembled together and fits inside the outer ring. Multiple tapered roller bodies are disposed on the cage, which is positioned between the inner and outer rings. The tapered roller bodies are rolled between the inner and outer rings. Sealing skeletons are provided on both sides of the outer ring. O-rings are provided between the sealing skeletons and the outer ring. A sealing rubber is connected to one side of the sealing skeleton. The end of the sealing rubber is attached to the side of the inner ring. A spring is circumferentially sleeved on one side of the sealing rubber. Steps are provided on both sides of the outer ring, and an axial fixing member is provided on one side of each step.
[0006] As a further description of the above technical solution:
[0007] A spacer is provided between the two inner rings, and the spacer is located in the middle of the cage.
[0008] As a further description of the above technical solution:
[0009] Both the inner and outer rings have raceways near each other, and the raceways are used for the rolling of the tapered rollers.
[0010] As a further description of the above technical solution:
[0011] The sealing frame is provided with an oil injection groove.
[0012] This utility model has the following beneficial effects:
[0013] In this invention, the tapered roller bearing comprises an inner ring, an outer ring, tapered roller bodies, spacers, a cage, an O-ring, a sealing skeleton, sealing rubber, and a spring. The protruding cylindrical portion of the bearing's irregularly shaped skeleton is fitted into the slot of the outer ring, achieving radial positioning of the seal through its engagement with the bearing housing. The O-ring contacts the irregularly shaped sealing skeleton and the end face of the outer ring axially on both sides, achieving sealing through axial preload from adjacent mounting components. The sealing rubber contacts the large flange of the inner ring with a double-lip seal. The outer lip primarily prevents the intrusion of external moisture and dust, while the inner lip primarily prevents grease leakage. A constant contact force is applied to the inner lip by a spring. The bearing is filled with an appropriate amount of grease, achieving maintenance-free operation. Attached Figure Description
[0014] Figure 1 This is a perspective view of a sealed tapered roller bearing proposed in this utility model;
[0015] Figure 2 This is a cross-sectional view of a sealed tapered roller bearing proposed in this utility model;
[0016] Figure 3 This is a partial enlarged cross-sectional view of a sealed tapered roller bearing proposed in this utility model.
[0017] Legend:
[0018] 1. Outer ring; 2. Inner ring; 3. Tapered roller body; 4. Cage; 5. Spacer; 6. O-ring; 7. Sealing skeleton; 8. Sealing rubber; 9. Spring; 10. Axial retainer; 11. Oil filling groove. Detailed Implementation
[0019] 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.
[0020] Reference Figure 1-3This utility model provides an embodiment of a sealed tapered roller bearing, comprising an inner ring 2, an outer ring 1, a cage 4, and tapered roller bodies 3. The inner ring 2 is composed of two rings assembled together and fits inside the outer ring 1. Multiple tapered roller bodies 3 are disposed on the cage 4, which is located between the inner ring 2 and the outer ring 1. The tapered roller bodies 3 are rotatably disposed between the inner ring 2 and the outer ring 1. Sealing skeletons 7 are provided on both sides of the outer ring 1, and O-ring seals 6 are provided between the sealing skeletons 7 and the outer ring 1. A sealing rubber 8 is connected to one side of the sealing skeleton 7, and the end of the sealing rubber 8 is attached to the side of the inner ring 2. A spring 9 is circumferentially sleeved on one side of the sealing rubber 8. Steps are provided on both sides of the outer ring 1, and axial fixing parts 10 are provided on one side of each step, which are the mounting parts for mounting components.
[0021] A spacer 5 is provided between the two rings of the inner ring 2. The spacer 5 is located in the middle of the cage 4 and is used to seal the bearing and connect the inner ring 2. Raceways are provided near the inner ring 2 and the outer ring 1, and the raceways are used for the rolling of the tapered rollers 3. An oil filling groove 11 is provided on the sealing skeleton 7 for adding lubricating oil.
[0022] Working Principle: The tapered roller bearing consists of an inner ring 2, an outer ring 1, tapered roller bodies 3, a spacer 5, a cage 4, an O-ring seal 6, a sealing skeleton 7, sealing rubber 8, and a spring 9. The bearing O-ring seal 6 contacts the shaped sealing skeleton 7, and the sealing rubber 8 contacts the retaining edge of the bearing inner ring 2, with the spring 9 providing a stable contact force. The radial positioning of the skeleton is achieved through the mounting fit between the skeleton and the bearing housing, and the axial positioning of the skeleton is achieved through contact with the axial positioning component 10 and adjacent mounting parts of the bearing. The bearing is filled with an appropriate amount of grease to achieve the maintenance-free function of the bearing. To prevent the seal from rotating relative to the bearing outer ring due to insufficient friction, one or more limiting grooves are machined on the bearing outer ring, and the sealing skeleton is inserted into the grooves.
[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A sealed type tapered roller bearing comprising an inner ring (2), an outer ring (1), a cage (4) and a tapered roller body (3), characterized in that: The inner ring (2) is composed of two rings assembled together. The inner ring (2) fits inside the outer ring (1). Multiple tapered rollers (3) are arranged on a retainer (4). The retainer (4) is arranged between the inner ring (2) and the outer ring (1). The tapered rollers (3) roll between the inner ring (2) and the outer ring (1). Both sides of the outer ring (1) are provided with sealing skeletons (7). An O-ring seal (6) is provided between the sealing skeleton (7) and the outer ring (1). One side of the sealing skeleton (7) is connected to a sealing rubber (8). The end of the sealing rubber (8) is attached to the side of the inner ring (2). A spring (9) is circumferentially sleeved on one side of the sealing rubber (8). Both sides of the outer ring (1) are provided with steps, and one side of each step is provided with an axial fixing member (10).
2. A sealed type tapered roller bearing according to claim 1, characterized in that: A spacer (5) is provided between the two rings of the inner ring (2), and the spacer (5) is located in the middle of the retainer (4).
3. A sealed tapered roller bearing according to claim 1, characterized in that: Both the inner ring (2) and the outer ring (1) are provided with raceways near each other, and the raceways are used for the conical roller body (3) to roll.
4. A sealed type tapered roller bearing according to claim 1, characterized by: An oil injection groove (11) is provided on the sealing frame (7).