Hub bearing

Abstract

The utility model belongs to the field of bearings, and particularly relates to a hub bearing which comprises an outer ring, an inner ring and two groups of roller components, two groups of sealing components are respectively arranged between two ends of the outer ring and the inner ring, a sealing cavity is formed among the two groups of sealing components, the outer ring and the inner ring, and the two groups of roller components are stacked in the sealing cavity. Each of the two groups of roller assemblies comprises a retainer and a plurality of tapered rollers, each of the two groups of sealing assemblies comprises a first sealing ring, a second sealing ring and a sealing check ring, and the first sealing ring, the second sealing ring and the sealing check ring are stacked between the outer ring and the inner ring from inside to outside to form sealing fit of the first sealing ring and the second sealing ring with the outer ring and the inner ring; the two roller assemblies are arranged in the sealing cavity between the outer ring and the inner ring, double-layer sealing is achieved through the first sealing ring, the second sealing ring and the sealing check ring, the sealing effect is higher, impurities can be effectively prevented from entering the position between the outer ring and the inner ring, and the service life of the hub bearing can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bearing technical field, concretely relates to a wheel hub bearing. BACKGROUND

[0002] The wheel hub bearing is one of the key parts of the automobile, and its main function is to bear the weight and provide accurate guidance for the rotation of the wheel hub, which requires it to not only bear the axial load but also bear the radial load. Since the wheel hub bearing is very close to the ground and the brake disc and other parts of high temperature, it needs to adapt to various complex road conditions and harsh driving environments. Therefore, the bearing sealing ring must have good leak-proof index, and also must have good heat resistance, mud and sewage resistance.

[0003] The existing wheel hub bearing adopts a single-layer sealing structure design, and the sealing performance is unreliable. The mud and sewage are easy to enter between the outer ring and the inner ring, and the impurities in the mud are easy to block the rolling of the tapered roller in the wheel hub bearing, which causes the friction of the wheel hub bearing to increase and greatly shortens the service life. SUMMARY

[0004] The utility model discloses a conical roller bearing, which can effectively prevent impurities from entering between the inner ring and the outer ring, and has better sealing performance.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a wheel hub bearing, comprising an outer ring, an inner ring, two groups of roller assemblies, two groups of sealing assemblies are arranged between the outer ring and the inner ring, respectively, a sealing cavity is formed between the two groups of sealing assemblies and the outer ring and the inner ring, the two groups of roller assemblies are stacked in the sealing cavity, the two groups of roller assemblies each comprise a retainer arranged in the sealing cavity and a plurality of tapered rollers arranged on the retainer, the two groups of sealing assemblies each comprise a first sealing ring, a second sealing ring and a sealing baffle, the first sealing ring, the second sealing ring and the sealing baffle are stacked between the outer ring and the inner ring from inside to outside, and constitute a sealing fit of the first sealing ring, the second sealing ring and the outer ring and the inner ring.

[0006] In some embodiments, the cross-sectional shape of the sealing baffle is L-shaped, one end of the sealing baffle has an annular shielding part shielding between the outer ring and the inner ring, the second sealing ring has a first sealing protruding ring clamped between the annular shielding part and the outer ring, the other end of the sealing baffle has a protruding ring part extending into the sealing cavity, and the first sealing ring has a second sealing protruding ring part clamped between the protruding ring part and the inner ring.

[0007] In some embodiments, the retaining ring is provided with a plurality of positioning holes arranged in an annular array, and the plurality of tapered rollers are arranged in the plurality of positioning holes respectively, and the retaining ring is provided with arc grooves on both sides of the corresponding positioning hole for contacting the tapered rollers.

[0008] In some embodiments, the retaining ring has an annular flange extending inwardly at one end, and the annular flange forms an oil storage space with the plurality of tapered rollers.

[0009] In some embodiments, the outer peripheral wall of the inner ring is provided with an annular positioning groove matched with the plurality of tapered rollers, the peripheral wall of the plurality of tapered rollers abuts against the annular positioning groove, and two oil storage grooves are arranged at both ends of the corresponding tapered roller in the annular positioning groove.

[0010] In some embodiments, the plurality of tapered rollers are provided with a circular groove at one end facing the second sealing ring.

[0011] In some embodiments, the outer ring is provided with a plurality of threaded holes arranged in an annular array at one end respectively.

[0012] In some embodiments, the outer peripheral wall of the outer ring has a fixed convex ring part, the fixed convex ring part is integrally formed with the outer ring, and the fixed convex ring part is provided with a plurality of bolts arranged in an annular array respectively.

[0013] The beneficial effects of the utility model are as follows: the two groups of roller assemblies are arranged in the sealing cavity between the outer ring and the inner ring, double-layer sealing is realized through the first sealing ring, the second sealing ring and the sealing baffle, the sealing effect is higher, impurities can be effectively blocked from entering between the outer ring and the inner ring, and the service life of the hub bearing is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the utility model.

[0015] Figure 1 It is a perspective view of the utility model embodiment;

[0016] Figure 2 It is a sectional view of the utility model embodiment;

[0017] Figure 3 It is Figure 2Enlarged view of middle A part;

[0018] Figure 4 The utility model discloses an embodiment of retaining ring's perspective view;

[0019] Figure 5 The utility model discloses an embodiment of sealing baffle's perspective view;

[0020] Figure 6 The utility model discloses an embodiment of inner ring's perspective view. DETAILED DESCRIPTION

[0021] In order to make the technical problem, technical scheme and beneficial effect that the utility model wants to solve more clearly, the following is combined with the embodiment, and the utility model is further detailedly explained. It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the utility model. The terms "include" and "have" and their any variations in the specification of the utility model and claims and the above-mentioned drawing description are intended to cover the non-exclusive inclusion.

[0023] The direction and position phrases mentioned in the utility model, for example, up, down, front, back, left, right, inside, outside, top, bottom, side, etc. are only the direction or position of the reference drawing. Therefore, the direction and position phrases used are used to explain and understand the utility model, and are not limited to the protection scope of the utility model.

[0024] The utility model is further illustrated by combining with the drawing and specific embodiment:

[0025] As Figures 1-3As shown, a kind of hub bearing, including outer ring 1, inner ring 2, two groups of roller assembly 3, outer ring 1 with two groups of sealing assembly 4 between the two ends of inner ring 2 respectively are provided with, two groups of sealing group 4 with outer ring 1, inner ring 2 between the sealing cavity 400 formed, two groups of roller assembly 3 are stacked in the sealing cavity 400, two groups of roller assembly 3 all include the retainer 31 being set in the sealing cavity 400 and multiple conical rollers 32 being set on the retainer 31 respectively, two groups of sealing assembly 4 all include first sealing ring 41, second sealing ring 42, sealing baffle 43, first sealing ring 41, second sealing ring 42, sealing baffle 43 are stacked from inside to outside between outer ring 1 and inner ring 2, and constitute the sealing cooperation of first sealing ring 41, second sealing ring 42 and outer ring 1, inner ring 2.Two groups of roller assembly are set in the sealing cavity between outer ring and inner ring, realize double-layer sealing by first sealing ring, second sealing ring, sealing baffle, and the sealing effect is higher, and can effectively block impurities into between outer ring and inner ring, it is favorable to prolong the service life of hub bearing.Sealing baffle can support, strengthen first sealing ring, second sealing ring, to thereby be favorable to promote the sealing reliability of this hub bearing.

[0026] As Figure 2 , 3 , 5, the cross-sectional shape of sealing baffle 43 is L-shaped, one end of sealing baffle 43 has an annular shielding portion 431 shielding between outer ring 1 and inner ring 2, second sealing ring 42 has a first sealing protruding ring 421 engaged between annular shielding portion 431 and outer ring 1, the other end of sealing baffle 43 has a protruding ring portion 432 extending into sealing cavity 400, and first sealing ring 41 has a second sealing protruding ring portion 411 engaged between protruding ring portion 432 and inner ring 2. First sealing ring and second sealing ring are respectively engaged between sealing baffle and outer ring and inner ring through first sealing protruding ring and second sealing protruding ring, thereby facilitating to improve the sealing performance of the sealing assembly.

[0027] As Figures 2-4 shown, a plurality of positioning holes 311 are arranged in an annular array on the retainer 31, and a plurality of conical rollers 32 are arranged in the plurality of positioning holes 311, and the retainer 31 has an arc groove 312 on both sides of each positioning hole 311 corresponding to the contact between the conical rollers 32. The retainer cooperates with the conical rollers through the arc groove, so as to ensure that the conical rollers maintain a stable motion track when rotating, and reduce deflection or sliding friction. One end of the retainer 31 has an annular flange 313 extending towards the inner ring 2, and an oil storage space 310 is formed between the annular flange 313 and the plurality of conical rollers 32. The annular flange can enhance the overall strength of the retainer, and the oil storage space can store lubricating grease, prolong the lubrication period, and reduce wear and heat.

[0028] As Figure 3 and 6As shown, the outer peripheral wall of the inner ring 2 is provided with an annular positioning groove 21 matched with the plurality of tapered rollers 32, the peripheral wall of the plurality of tapered rollers 32 abuts in the annular positioning groove 21, and two oil storage grooves 211 are arranged at both ends of the tapered roller 32 in the annular positioning groove 21. The oil storage groove can store grease, prolong the lubrication period, reduce wear and heat, and is beneficial to prolong the service life of the bearing.

[0029] As shown in Figure 1 and 2 The plurality of tapered rollers 32 are provided with a circular groove 321 on one end of the second sealing ring 42. The circular groove can accommodate more lubricating oil or grease, form an oil film, and reduce dry friction between the upper end of the tapered roller and the retainer. The outer ring 1 is provided with a plurality of threaded holes 11 arranged in a ring array at one end. The outer peripheral wall of the outer ring 1 has a fixed convex ring part 12, which is integrally formed with the outer ring 1, and a plurality of bolts 13 arranged in a ring array are arranged on the fixed convex ring part 12. A plurality of threaded holes and a plurality of bolts are arranged on the outer ring, so that the installation of the hub bearing is facilitated, and the installation is more convenient.

[0030] The above is only one embodiment of the present application, and is not intended to limit the protection scope of the present application; the protection scope of the present application is defined by the claims in the claims, and any equivalent changes and modifications made according to the present application are within the protection scope of the present application patent.

Claims

1. A hub bearing, comprising an outer ring, an inner ring, and two sets of roller assemblies, characterized in that: Two sets of sealing assemblies are respectively provided between the two ends of the outer ring and the inner ring. The two sets of sealing assemblies form a sealing cavity with the outer ring and the inner ring. The two sets of roller assemblies are stacked in the sealing cavity. Each set of roller assemblies includes a cage disposed in the sealing cavity and multiple tapered rollers respectively disposed on the cage. Each set of sealing assemblies includes a first sealing ring, a second sealing ring, and a sealing retainer ring. The first sealing ring, the second sealing ring, and the sealing retainer ring are stacked from the inside to the outside between the outer ring and the inner ring, and constitute a sealing fit between the first sealing ring, the second sealing ring, and the outer ring and the inner ring.

2. The hub bearing according to claim 1, characterized in that: The sealing ring has an L-shaped cross-section. One end of the sealing ring has an annular blocking portion that covers the outer ring and the inner ring. The second sealing ring has a first sealing protrusion that engages between the annular blocking portion and the outer ring. The other end of the sealing ring has a protrusion that extends into the sealing cavity. The first sealing ring has a second sealing protrusion that engages between the protrusion and the inner ring.

3. The hub bearing according to claim 1 or 2, characterized in that: The cage has multiple positioning holes arranged in a circular array, and multiple tapered rollers are respectively arranged in the multiple positioning holes. The cage also has arc-shaped grooves on both sides of the corresponding positioning holes for the tapered rollers to contact each other.

4. The hub bearing according to claim 3, characterized in that: The cage has an annular flange extending inward at one end, and an oil storage space is formed between the annular flange and multiple tapered rollers.

5. The hub bearing according to claim 1, characterized in that: The outer peripheral wall of the inner ring is provided with an annular positioning groove that mates with multiple tapered rollers. The peripheral walls of the multiple tapered rollers abut against the annular positioning groove, and two oil storage grooves are provided at the two ends of the tapered rollers in the annular positioning groove.

6. The hub bearing according to claim 1, characterized in that: The multiple tapered rollers have circular grooves on the ends facing the second sealing ring.

7. The hub bearing according to claim 1, characterized in that: The outer ring has multiple threaded holes arranged in a ring array at one end.

8. The hub bearing according to claim 7, characterized in that: The outer ring has a fixed protruding ring on its outer peripheral wall. The fixed protruding ring is integrally formed with the outer ring. Multiple bolts are arranged in a ring array on the fixed protruding ring.

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