Hub bearing sealing structure

Abstract

The utility model provides a hub bearing sealing structure which comprises a flange outer ring and a flange inner ring, the flange inner ring comprises a flange portion, a first spacing opening is formed in the flange portion, close to the flange inner ring, of the flange outer ring and the flange inner ring, and the hub bearing sealing structure further comprises a first sealing ring and a second sealing ring which are located at the first spacing opening. The first sealing ring is connected to the inner ring of the flange in a sleeving mode, an opening and a water retaining part are arranged on the first sealing ring, the water retaining part is arranged on the outer wall of the first sealing ring and is in interference abutting fit with the root of the flange part, and the second sealing ring comprises an extending part and a first sealing lip arranged on the extending part; the extending part extends towards the flange inner ring and extends into the first sealing ring through the opening, the extending part is in clearance fit with the inner wall of the first sealing ring, and the first sealing lip elastically abuts against the inner wall of the first sealing ring. Aiming at the defects in the prior art, the utility model provides the hub bearing sealing structure capable of reducing the rotating torque of the bearing and ensuring the sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing field especially a hub bearing sealing structure. BACKGROUND

[0002] With the rapid development of new energy vehicles, the endurance problem of the vehicle is an important concern of the vehicle factory, the rotating torque of the hub bearing has a great influence on the endurance of the whole vehicle, in order to ensure the sealing effect, the sealing structure of the prior art hub bearing is provided with multiple interference abutting sealing lips, which leads to large sealing torque, which will cause certain adverse effects on the endurance of new energy vehicles, therefore, the market also reduces the torque sealing by not using the contact type sealing, but the leakage of grease will occur, for this kind of situation, a third generation hub bearing sealing structure with low rotating torque and anti-leakage of grease is proposed to reduce the rotating torque of the bearing and prevent leakage of grease, thereby improving the endurance of new energy vehicles. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides a hub bearing sealing structure capable of reducing the rotating torque of the bearing and ensuring the sealing performance.

[0004] To achieve the above purpose, the utility model provides a hub bearing sealing structure, including flange outer ring and flange inner ring, the flange inner ring includes flange part, the flange outer ring and flange inner ring form first interval mouth at the flange part close to the flange inner ring, still including the first sealing ring and second sealing ring at first interval mouth, the first sealing ring is sleeved in the position of the corresponding flange part of flange inner ring, the cross section of first sealing ring is hollow, is provided with opening and water retaining part on first sealing ring, the water retaining part is arranged at the outer wall of first sealing ring and is in interference abutting cooperation with the root of flange part, the water retaining part is composed of elastic material, the second sealing ring includes extension and first sealing lip on extension, the extension extends towards the direction of flange inner ring and extends into first sealing ring through opening, and the extension and the inner wall of first sealing ring are gap matched, the first sealing lip is elastically abutted on the inner wall of first sealing ring.

[0005] The first sealing ring and the second sealing ring are arranged at the first interval opening, the flange inner ring is sleeved on the corresponding flange part, the water blocking part is arranged outside the first sealing ring, the water blocking part is made of elastic material and is in interference fit at the root of the flange part, the penetration of external impurities is prevented, the impurities entering the water blocking part are thrown out, the flange inner ring is hollow, the opening is arranged for the extension of the second sealing ring, the extension and the inner wall of the first sealing ring are in gap fit, the labyrinth seal is formed, the first sealing lip is arranged, the first sealing lip is in elastic interference fit on the inner wall of the first sealing ring to form the contact seal, the labyrinth seal in gap fit is taken as the main body, the contact seal is arranged, the bearing rotating torque is reduced under the premise of ensuring the sealing performance.

[0006] The opening of the first sealing ring is arranged at one side close to the roller, the second sealing ring comprises an upper part and a bent part, the upper part is arranged between the axial end of the flange outer ring and the flange part, the bent part is bent and extended from the lower end of the upper part to the roller direction and is connected with the extension part above the opening.

[0007] The opening of the first sealing ring is arranged at one side close to the roller, the second sealing ring comprises an upper part and a bent part, the upper part is arranged between the axial end of the flange outer ring and the flange part, the bent part is bent and extended from the lower end of the upper part to the roller direction and is connected with the extension part above the opening.

[0008] The first sealing ring comprises a first inner wall extending in the radial direction, and the first sealing lip is arranged to extend in the direction away from the bearing axis and is in interference fit on the first inner wall.

[0009] The first sealing ring comprises a first inner wall extending in the radial direction, and the first sealing lip is arranged to extend in the direction away from the bearing axis and is in interference fit on the first inner wall.

[0010] The second sealing ring comprises a second sealing lip, the second sealing lip is arranged on the extension part and extends in the direction away from the bearing axis, the second sealing lip is in gap fit with the inner wall of the first sealing ring, and the cross section of the second sealing lip and the extension part is arranged in a Y shape.

[0011] Further, the second sealing lip is arranged on the second sealing ring and matched with the gap of the inner wall of the first sealing ring, the length of the normal gap is further increased, the effect of the labyrinth seal is strengthened, the second sealing lip is arranged in Y shape with the section of the extension part, the external impurities entering can be better thrown out, the impurities are prevented from further entering, and the effect of the seal is strengthened.

[0012] The utility model discloses further set up: the upper portion of second sealing ring is provided with third sealing lip, third sealing lip tilt extension setting and matched with the gap between flange portion.

[0013] Further, the third sealing lip is arranged on the upper portion of the second sealing ring and matched with the gap of the flange portion, the entering of the external impurities is further limited, the effect of the labyrinth seal is strengthened. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of the embodiment of the utility model;

[0015] Figure 2 It is the embodiment of the utility model Figure 1 The enlarged view of a part in the embodiment of the utility model;

[0016] Figure 3 It is the embodiment of the utility model Figure 2 The enlarged view of b part in the embodiment of the utility model;

[0017] Figure 4 It is the embodiment of the utility model Figure 2 The enlarged view of c part in the embodiment of the utility model;

[0018] Wherein: flange outer ring 1;Flange inner ring 2;Flange portion 21;First interval 3;First sealing ring 4;Opening 41;Water retaining portion 42;First inner wall 43;Second sealing ring 5;Extension part 51;First sealing lip 52;Upper portion 53;Bent portion 54;Second sealing lip 55;Third sealing lip 56;Roller 6;Third sealing ring 7;Fourth sealing ring 8. DETAILED DESCRIPTION

[0019] The utility model discloses a kind of hub bearing sealing structure's implementation, as shown in Figures 1-4The first sealing ring 4 is provided with an opening 41 and a water blocking portion 42, the water blocking portion 42 is arranged on the outer wall of the first sealing ring 4 and abuts against the root of the flange portion 21 in interference fit, the water blocking portion 42 is made of elastic material, the second sealing ring 5 comprises an extension portion 51 and a first sealing lip 52 arranged on the extension portion, the extension portion 51 extends towards the flange inner ring 2 and extends into the first sealing ring 4 through the opening 41, and the extension portion 51 and the inner wall of the first sealing ring 4 are in clearance fit, the first sealing lip 52 elastically abuts against the inner wall of the first sealing ring 4.

[0020] The opening of the first sealing ring 4 is arranged at the side close to the roller 6, the second sealing ring 5 comprises an upper portion 53 and a bent portion 54, the upper portion 53 is arranged between the axial end of the flange outer ring 1 and the flange portion 21, the bent portion 54 is bent and extends from the lower end of the upper portion 53 towards the roller 6 and is connected to the extension portion 51 above the opening 41, and the bent portion 54 and the outer wall of the first sealing ring 4 are in clearance fit.

[0021] The first sealing ring 4 comprises a first inner wall 43 extending in the radial direction, and the first sealing lip 52 is arranged to extend in the direction away from the bearing axis and abut against the first inner wall 43.

[0022] The second sealing ring 5 is provided with a second sealing lip 55, the second sealing lip 55 is arranged on the extension portion 51 and extends in the direction away from the bearing axis, the second sealing lip 55 is in clearance fit with the inner wall of the first sealing ring 4, and the cross section of the second sealing lip 55 and the extension portion 51 is Y-shaped.

[0023] The upper portion of the second sealing ring 5 is provided with a third sealing lip 56, the third sealing lip 56 extends in the direction away from the bearing axis and is in clearance fit with the flange portion 21.

[0024] In the embodiment, a second spacing opening 7 opposite to the first spacing opening is also arranged, and the sealing structure at the second spacing opening is provided with a third sealing ring 7 and a fourth sealing ring 8 similar to the first sealing ring 4 and the second sealing ring 5, and the difference is that the third sealing ring 7 does not need to be provided with the same structure as the water blocking portion 42, and the fourth sealing ring 8 does not need to be provided with the same structure as the third sealing lip 56.

[0025] The above examples are only one of the preferred specific examples of the present application, and the usual changes and replacements made by those skilled in the art within the technical scheme of the present application are included in the protection scope of the present application.

Claims

1. A hub bearing seal assembly comprising a flanged outer race and a flanged inner race, said flanged inner race comprising a flange portion, said flanged outer race and flanged inner race forming a first gap adjacent the flange portion of the flanged inner race, characterized in that: The first sealing ring is sleeved on the corresponding flange part of the flange inner ring, the cross section of the first sealing ring is hollow, the first sealing ring is provided with an opening and a water retaining part, the water retaining part is arranged on the outer wall of the first sealing ring and is in interference abutting connection with the root of the flange part, the water retaining part is made of elastic material, the second sealing ring comprises an extension part and a first sealing lip arranged on the extension part, the extension part extends towards the flange inner ring and extends into the first sealing ring through the opening, and the extension part and the inner wall of the first sealing ring are in clearance fit, and the first sealing lip is in elastic abutting connection with the inner wall of the first sealing ring.

2. The hub bearing seal structure of claim 1, wherein: The opening of the first sealing ring is arranged at one side close to the roller, the second sealing ring comprises an upper part and a bent part, the upper part is arranged between the axial end of the flange outer ring and the flange part, the bent part is bent and extended from the lower end of the upper part towards the roller and is connected with the extension part above the opening, and the bent part and the outer wall of the first sealing ring are in clearance fit.

3. Hub bearing sealing structure according to claim 1 or 2, characterized in that: The first sealing ring comprises a radially extending first inner wall, the first sealing lip is arranged in inclined extension away from the bearing axis and is in abutting connection with the first inner wall.

4. The hub bearing seal structure of claim 1 or 2, wherein: The second sealing ring is provided with a second sealing lip, the second sealing lip is arranged on the extension part and is arranged in inclined extension away from the bearing axis, the second sealing lip is in clearance fit with the inner wall of the first sealing ring, and the cross section of the second sealing lip and the extension part is arranged in Y shape.

5. The hub bearing seal construction of claim 2 wherein: The upper part of the second sealing ring is provided with a third sealing lip, the third sealing lip is arranged in inclined extension away from the bearing axis and is in clearance fit with the flange part.

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