Double-row tapered roller bearing

Abstract

The utility model discloses a double-row tapered roller bearing which comprises an inner ring and an outer ring, a cavity is formed between the inner ring and the outer ring, a rolling piece is arranged in the cavity, a sealing piece is further arranged between the inner ring and the outer ring, the sealing piece is used for sealing the cavity, the sealing piece comprises a sealing ring and a dustproof cover, and the sealing ring and the dustproof cover are connected in a matched mode. And through the double-layer sealing arrangement of the sealing ring and the dustproof cover, external impurities are prevented from entering the space between the inner ring and the outer ring, and the durability of the bearing is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, and in particular relates to a double-row tapered roller bearing. Background Art

[0002] Tapered roller bearings are separable bearings, mainly used to bear radial and axial combined loads, mainly radial loads. This type of bearing has a variety of structural types, such as single-row, double-row and four-row tapered roller bearings.

[0003] In the prior art, for example, the patent document with patent announcement number CN209838944U and patent name "A tapered roller bearing with anti-lubricating oil leakage structure" shows that a tapered roller is arranged between the inner ring and the outer ring, and the tapered roller is exposed to the outside. If it is not processed in time, external impurities enter between the inner ring and the outer ring, affecting the movement of the tapered roller. Therefore, the utility model proposes a double-row tapered roller bearing. Utility Model Content

[0004] The utility model aims to solve the above technical problems existing in the prior art and provide a double-row tapered roller bearing. The sealing performance of the cavity is improved by arranging a sealing ring and a dust cover, thereby increasing the practicability of the bearing.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A double-row tapered roller bearing comprises an inner ring and an outer ring, a cavity is formed between the inner ring and the outer ring, a rolling element is arranged in the cavity, and a seal is also arranged between the inner ring and the outer ring, the seal is used to seal the cavity, the seal comprises a sealing ring and a dust cover, and the sealing ring and the dust cover are connected in a matching manner.

[0007] Furthermore, the sealing ring is provided with a plurality of isolating members, and the isolating members abut against the dust cover, so that a plurality of isolating cavities are formed between the sealing ring and the dust cover.

[0008] Furthermore, it also includes a pre-tightening member, which passes through the ring hoop sealing ring and the dust cover, so that the isolation member on the sealing ring abuts against the dust cover.

[0009] Furthermore, a retaining frame is provided in the cavity, and the retaining frame is used to distribute the rolling elements circumferentially, with the rolling surfaces of the rolling elements facing the inner ring and the outer ring.

[0010] Furthermore, the retainer and the inner ring are formed integrally.

[0011] Furthermore, the inner ring is provided with ribs, and first limiting grooves are formed between the ribs. The first limiting grooves are used to limit the rolling element to restrict the sliding of the rolling element.

[0012] Furthermore, the inner ring is also provided with an oil seepage groove, which passes through the limiting groove, so that the lubricating oil enters the first limiting groove.

[0013] Furthermore, the rolling element adopts a double-row tapered roller, with the ends with smaller diameters facing each other and the ends with larger diameters facing each other, so as to facilitate assembly.

[0014] Furthermore, the outer ring is provided with an inclined surface, the inclined surface is in contact with the rolling surface of the rolling element, and the inclined direction of the inclined surface is toward the sealing element.

[0015] Furthermore, the outer ring is provided with a second limiting groove, and the second limiting groove is used to set a retaining spring, and the retaining spring is used to resist the sealing member to limit the position of the sealing member.

[0016] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0017] The utility model comprises an inner ring and an outer ring, a cavity is formed between the inner ring and the outer ring, a rolling element is arranged in the cavity, a sealing element is also arranged between the inner ring and the outer ring, the sealing element is used to seal the cavity, the sealing element comprises a sealing ring and a dust cover, and the sealing ring and the dust cover are matched and connected. The double-layer sealing arrangement of the sealing ring and the dust cover prevents external impurities from entering between the inner ring and the outer ring, thereby improving the durability of the bearing.

[0018] Furthermore, the sealing ring is provided with a plurality of isolating members, which abut against the dust cover, so that an isolating cavity is formed between the sealing ring and the dust cover, forming a sealing structure with multiple isolations and cavities, which effectively prevents external impurities from entering the cavity through the connecting gap between the sealing ring and the dust cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0022] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0023] Figure 4 This is a schematic diagram of the internal structure of the dust cover in the utility model;

[0024] Figure 5 It is a schematic diagram of the internal structure of the sealing ring in the utility model.

[0025] In the figure, 1-outer ring; 2-inner ring; 3-inclined surface; 4-cage; 5-rolling element; 6-oil seepage groove; 7-seal; 8-seal ring; 9-dust cover; 10-isolator; 11-preload member; 12-isolator cavity; 13-retaining edge; 14-second limit groove. DETAILED DESCRIPTION

[0026] like Figures 1 to 5 As shown, the double-row tapered roller bearing of the utility model includes an inner ring 2 and an outer ring 1, a cavity is formed between the inner ring 2 and the outer ring 1, a rolling element 5 is arranged in the cavity, and a sealing element 7 is also arranged between the inner ring 2 and the outer ring 1. The sealing element 7 is used to seal the cavity. The sealing element 7 includes a sealing ring 8 and a dust cover 9, and the sealing ring 8 and the dust cover 9 are matched and connected. The sealing ring 8 is provided with a plurality of spacers 10, and the spacers 10 abut against the dust cover 9, so that a plurality of isolation cavities 12 are formed between the sealing ring 8 and the dust cover 9. By adding a plurality of dustproof isolations, it is possible to prevent the leakage of the bearing lubricating oil and prevent the external liquid or impurities from invading the cavity. The sealing structure is also called a labyrinth sealing structure, which meets the requirements of the walking system for the harsh use environment of high pollution and high load, and has the characteristics of compact structure, good sealing performance, easy installation, and maintenance-free. The utility model also includes a pre-tightening member 11, which passes through the ring-hoop sealing ring 8 and the dust cover 9, so that the isolation member 10 on the sealing ring 8 abuts against the dust cover 9. The pre-tightening member 11 can adopt a pre-tightening spring, and the head and tail connecting sleeves of the pre-tightening spring are arranged on the sealing ring 8. The ring-hoop force of the pre-tightening spring is elastic and will not affect the rotation of the inner ring 2.

[0027] A cage 4 is provided in the cavity, and the cage 4 is used to distribute the rolling element 5 circumferentially, and the rolling surface of the rolling element 5 faces the inner ring 2 and the outer ring 1. The cage 4 and the inner ring 2 are formed integrally. The inner ring 2 is provided with a rib 13, and a first limiting groove is formed between the ribs 13. The first limiting groove is used to limit the rolling element 5 to limit the sliding of the rolling element 5. The rib 13 also bears the impact of both ends of the rolling element 5 to prevent the rolling element 5 from hitting the cage 4. The inner ring 2 is also provided with an oil seepage groove 6, which runs through the limiting groove, so that the lubricating oil enters the first limiting groove, so that the rolling element 5 is fully lubricated.

[0028] The rolling element 5 is a double-row tapered roller, with the smaller diameter ends of the tapered rollers facing each other and the larger diameter ends facing each other for easy assembly. The outer ring 1 is provided with an inclined surface 3, which fits the rolling surface of the rolling element 5, and the inclined direction of the inclined surface 3 faces the seal 7, so that excess lubricating oil flows to the seal 7. The outer ring 1 is provided with a second limiting groove 14, which is used to set a retaining spring, which is used to resist the seal 7 to limit the position of the seal 7.

[0029] The above are only specific embodiments of the utility model, but the technical features of the utility model are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the utility model to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the utility model.

Claims

1. A double-row tapered roller bearing, comprising an inner ring and an outer ring, wherein a cavity is formed between the inner ring and the outer ring, and a rolling element is arranged in the cavity, characterized in that: A sealing member is also provided between the inner ring and the outer ring, and the sealing member is used to seal the cavity. The sealing member comprises a sealing ring and a dust cover, and the sealing ring and the dust cover are cooperatively connected.

2. The double row tapered roller bearing according to claim 1, characterized in that: The sealing ring is provided with a plurality of isolating members, and the isolating members abut against the dust cover, so that a plurality of isolating cavities are formed between the sealing ring and the dust cover.

3. The double row tapered roller bearing according to claim 2, characterized in that: It also includes a pre-tightening member, which is arranged around the sealing ring and the dust cover so that the isolating member on the sealing ring abuts against the dust cover.

4. The double row tapered roller bearing according to claim 1, characterized in that: A retaining frame is provided in the cavity, and the retaining frame is used to distribute the rolling elements circumferentially, and the rolling surfaces of the rolling elements face the inner ring and the outer ring.

5. The double row tapered roller bearing according to claim 4, characterized in that: The retaining frame and the inner ring are formed integrally.

6. The double row tapered roller bearing according to claim 1, characterized in that: The inner ring is provided with ribs, and a first limiting groove is formed between the ribs. The first limiting groove is used to limit the rolling element to restrict the sliding of the rolling element.

7. The double row tapered roller bearing according to claim 6, characterized in that: The inner ring is also provided with an oil seepage groove, which passes through the first limiting groove, so that lubricating oil enters the first limiting groove.

8. The double row tapered roller bearing according to claim 1, characterized in that: The rolling element adopts a double-row tapered roller, wherein the ends of the tapered rollers with smaller diameters are opposite to each other and the ends of the tapered rollers with larger diameters are opposite to each other.

9. The double row tapered roller bearing according to claim 1, characterized in that: The outer ring is provided with an inclined surface, the inclined surface is in contact with the rolling surface of the rolling element, and the inclined direction of the inclined surface is toward the sealing element.

10. The double row tapered roller bearing according to claim 1, characterized in that: The outer ring is provided with a second limiting groove, the second limiting groove is used to set a clamping spring, and the clamping spring is used to resist the sealing member to limit the position of the sealing member.

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