CN211975684U - Combined sealing ring for hub bearing wheel side - Google Patents
Combined sealing ring for hub bearing wheel side Download PDFInfo
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- CN211975684U CN211975684U CN202020523073.XU CN202020523073U CN211975684U CN 211975684 U CN211975684 U CN 211975684U CN 202020523073 U CN202020523073 U CN 202020523073U CN 211975684 U CN211975684 U CN 211975684U
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Abstract
Provided is a combined seal ring for a hub bearing wheel side, which is composed of a 1 st seal ring and a 2 nd seal ring, and comprises a 1 st metal framework and a 1 st sealing component, and a 2 nd metal framework and a 2 nd sealing component, wherein the 1 st sealing component is formed with: the 1 st sealing lip is elastically contacted with the horizontal part which is embedded in the hub main shaft in the 2 nd metal framework of the 2 nd sealing ring; a 2 nd seal lip in elastic contact with a 2 nd main body portion extending obliquely in the 2 nd metal skeleton; the 1 st side lip is positioned above the 2 nd sealing lip and has a gap with the 2 nd sealing ring; and a retaining edge which obliquely extends towards the axial direction and the radial direction and has a gap with the flange part of the hub bearing. The 2 nd sealing part is provided with a 2 nd side lip at the radial outer end of the 2 nd metal framework, the 2 nd side lip extends towards the 1 st sealing ring above the 1 st side lip of the 1 st sealing part and has a gap with the 1 st sealing ring, and therefore a multi-path labyrinth sealing structure is formed between the 1 st sealing ring and the 2 nd sealing ring.
Description
Technical Field
The present invention relates to a combined seal ring for a wheel side used in a hub bearing for supporting a wheel of an automobile, for example.
Background
Conventionally, a hub bearing for supporting a wheel of an automobile has used a seal ring for sealing between an inner member and an outer member in order to prevent foreign matter such as muddy water from entering the hub bearing. Such seal rings are attached to both end portions between the inner member and the outer member of the hub bearing.
Fig. 3 is an enlarged cross-sectional view showing a conventional seal ring mounted on the wheel side of the hub bearing. In the figure, the hub bearing includes an outer member 5 as an outer ring, a hub spindle 1 formed with a flange 6 for fixing an automobile wheel, and rolling elements (not shown) interposed between the outer member 5 and the hub spindle 1. An outer seal ring 20 is mounted between the hub spindle and the outer member on the wheel side. As shown in fig. 3, the sealing lip of the outer seal ring 20 is in direct contact with the hub spindle 1, and a so-called suction lip effect is generated. The suction lip effect means that after the hub spindle is machined, a matching part with the sealing ring inevitably generates spiral linear grinding textures, if the sealing ring is directly matched with the hub spindle, due to the existence of the spiral linear textures, a pump effect can be generated in the clockwise rotation process of the bearing, so that air pressure in the bearing is discharged, the contact area of the matching part of the sealing lip and the hub spindle is increased, suction is generated, and friction torque is increased.
In order to improve this phenomenon, patent documents 1 and 2 adopt a structure of a composite seal ring for a hub bearing wheel side. According to the configurations of patent documents 1 and 2, the combination seal ring is composed of a 1 st seal ring fitted and fixed to a wheel-side end portion of the outer ring, and a 2 nd seal ring fitted and fixed to the hub spindle. The sealing lip of the 1 st sealing ring is in contact fit with the metal framework of the 2 nd sealing ring, so that the effect of improving the lip suction effect is achieved, and the friction torque effect is reduced.
Documents of the prior art
Patent document
Patent document 1: JP2016-80141A
Patent document 2: JP2017-48809A
However, in the structure of patent document 1, since all of the three seal lips of the 1 st seal ring are in contact with the metal skeleton of the 2 nd seal ring, there is room for improvement in terms of frictional performance, and there is room for improvement in terms of sealing performance, which is a labyrinth seal structure formed by the 1 st seal ring and the 2 nd seal ring. Also in the structure of patent document 2, there is room for improvement in the labyrinth structure formed by the 1 st seal ring and the 2 nd seal ring.
SUMMERY OF THE UTILITY MODEL
The present invention has been made in view of the above problems, and an object of the present invention is to provide a combined seal ring for a hub bearing wheel side, which can further improve friction performance, sealing performance, and use reliability.
Specifically, according to the utility model discloses a 1 st aspect provides a hub bearing wheel side is used and is made up formula sealing washer, and this hub bearing includes: an outer member having a plurality of rows of outer ring raceways integrally formed on an inner circumferential surface thereof; an inner member including a hub spindle and an inner ring press-fitted into the hub spindle, the inner member having a plurality of inner ring raceways formed on an outer circumferential surface thereof, the inner ring raceways facing the plurality of outer ring raceways, and a flange portion formed at an axially outer end of the hub spindle for fixing a wheel of an automobile; a plurality of rows of rolling elements rollably accommodated between raceways of the inner member and the outer member; and a seal ring including an inner seal ring and an outer seal ring, the outer seal ring being mounted between the outer member and the inner member at both ends of the outer member, wherein the combined seal ring for the hub bearing wheel side is an outer seal ring, and includes a 1 st seal ring that is fitted around and fixed to an axially outer end of the outer member, and a 2 nd seal ring that is fitted around and fixed to the hub spindle. The 1 st seal ring includes a 1 st metal shell and a 1 st seal member, the 1 st metal shell includes a 1 st main body portion surrounding a part of an outer peripheral surface of the outer member and an axially outer end surface, an inclined portion extending from a radially inner end of the 1 st main body portion to a radially inner side and to an axially inner side, and a 1 st extending portion extending from a radially inner end of the inclined portion to a radially inner side, and the 1 st seal member is integrally attached to an outer surface of the 1 st metal shell along an entire portion of the 1 st metal shell. The 2 nd seal ring includes a 2 nd metal frame and a 2 nd seal member, the 2 nd metal frame includes a horizontal portion fitted to the hub main shaft, a 2 nd main body portion extending radially outward and obliquely outward from an axially outer end of the horizontal portion, and a 2 nd extending portion extending further radially outward from a radially outer end of the 2 nd main body portion, and the 2 nd seal member is integrally attached to outer surfaces of the 2 nd extending portion and the 2 nd main body portion of the 2 nd metal frame and a part of an inner surface of a radially outer end of the 2 nd extending portion. In the 1 st extension part of the 1 st metal skeleton, the 1 st sealing member is formed with: a 1 st seal lip which extends axially inward from a radially inner end of the 1 st extending portion and radially inward at an inclination and which elastically contacts a horizontal portion of a 2 nd metal skeleton of the 2 nd seal ring; a 2 nd seal lip which extends from a radially inner end of the 1 st extending portion to an axially outer side and to a radially outer side obliquely and which elastically contacts a 2 nd main body portion of a 2 nd metal skeleton of the 2 nd seal ring; a 1 st side lip which is located above the 2 nd seal lip with a gap therebetween, extends obliquely to an axially outer side and a radially outer side toward a 2 nd extending portion of the 2 nd metal skeleton, and has a gap with the 2 nd seal ring; and a stopper edge which extends obliquely axially outward and radially outward in the vicinity of a corner portion at a radially outer end of the 1 st metal skeleton body portion 1, and which has a gap with the flange portion. The 2 nd seal member has a 2 nd side lip formed at an outer end in a radial direction of a 2 nd extending portion of the 2 nd metal skeleton, and the 2 nd side lip is formed above the 1 st side lip of the 1 st seal member, extends obliquely inward in an axial direction and inward in a radial direction toward the 1 st extending portion of the 1 st metal skeleton, and has a gap with the 1 st seal ring. A plurality of labyrinth structures are formed between the 1 st seal ring and the 2 nd seal ring.
According to the utility model discloses a 2 nd scheme, on the basis of 1 st scheme, the 2 nd metal framework of above-mentioned 2 nd sealing washer does not contact with above-mentioned flange portion of above-mentioned wheel hub main shaft, and forms the space between above-mentioned 2 nd metal framework and above-mentioned flange portion, and above-mentioned 2 nd seal part still is formed with the 3 rd seal lip at the radial outer end of the 2 nd extension of above-mentioned 2 nd metal framework, and this 3 rd seal lip extends and with the flange portion elastic contact of above-mentioned wheel hub main shaft to the axial outside and to the radial outside slope.
According to the 3 rd aspect of the present invention, in addition to the 1 st or 2 nd aspect, when the maximum diameter at the tip of the 1 st side lip of the 1 st seal member is Φ a and the maximum diameter at the tip of the 2 nd side lip of the 2 nd seal member is Φ B, Φ a < Φ B.
Effect of the utility model
According to the above-mentioned 1 st aspect, because the seal lip of the 1 st seal ring is not in contact with the hub main shaft, but is in contact with the 2 nd metal skeleton of the 2 nd seal ring, the lip suction effect that is produced because the seal lip cooperates with the hub main shaft can be improved, thereby reducing the friction torque. In addition, the 1 st seal ring has only two seal lips in contact with the 2 nd metal skeleton of the 2 nd seal ring, and the friction torque can be reduced by reducing the contact surface pressure and the contact area as compared with the case of three-lip contact as shown in fig. 3 and reference 1.
Further, a plurality of labyrinth structures are formed between the 1 st seal ring and the 2 nd seal ring, whereby the sealing performance is improved, and intrusion of muddy water or the like can be prevented. Further, the 1 st seal member is formed in the vicinity of the corner portion of the 1 st main body portion of the 1 st metal skeleton, and has a stopper edge extending obliquely outward in the axial direction and outward in the radial direction and leaving a gap with the flange portion, so that a labyrinth seal structure is formed between the flange portion and the 1 st seal member, and direct intrusion of foreign matter such as muddy water can be prevented.
In addition, according to the above-described aspect 2, the metal skeleton of the 2 nd seal ring is fitted only to the hub main shaft diameter, and does not contact the flange portion. Thus, when a bending moment load is applied to the hub bearing during use, the hub bearing can be prevented from moving in the axial direction. And therefore the reliability of use is high.
Further, since the 2 nd seal member further has the 3 rd seal lip elastically contacting the flange portion formed at the radially outer end of the 2 nd extending portion of the 2 nd metal skeleton, the sealing property can be ensured.
Further, according to the above-described aspect 3, when the maximum diameter at the tip of the 1 st side lip of the 1 st seal member is Φ a and the maximum diameter at the tip of the 2 nd side lip of the 2 nd seal member is Φ B, Φ a < Φ B. Therefore, in the rotating process of the hub bearing, the pump effect is generated in the labyrinth internal environment of the labyrinth seal structure under the action of the centrifugal force, and the function of promoting the discharge of muddy water can be achieved.
According to the utility model discloses, can provide the hub bearing wheel side combination formula sealing washer of usefulness that further improves friction properties, sealing performance, use reliability.
Drawings
Fig. 1 is a longitudinal sectional view showing a hub bearing for supporting a wheel of an automobile to which the seal ring according to the present invention and the prior art can be applied.
Fig. 2 is an enlarged view of a main portion of the seal ring according to the present invention, as compared to fig. 1.
Fig. 3 is an enlarged view of a main portion of a prior art seal ring.
Description of the reference numerals
1: hub spindle, 1a, 2 a: inner ring raceway, 2: inner ring, 3: inner member, 4: rolling element, 5: outer member (outer ring), 5 a: outer ring raceway, 6: flange portion, 6 a: bolt, 8: bolt hole, 13: light weight orifice, 20: outer seal ring, 30: inner seal ring, 21: 1 st gasket, 25: no. 2 seal ring, 22: 1 st metal skeleton, 23: 1 st seal member, 22 a: 1 st body portion, 22 b: inclined portion, 22 c: extension No. 1, 26: metal skeleton 2, 27: 2 nd seal member, 26 a: horizontal portion, 26 b: 2 nd body portion, 26 c: extension 2, 23 a: 1 st seal lip, 23 b: 2 nd seal lip, 23 c: 1 st side lip, 23 d: catch, 27 a: side 2 lip, 27 b: and 3, a sealing lip.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, the proportions of the components may be different, and some components may be omitted. In addition, the "outer" in the axial direction means the outer side in the vehicle width direction, that is, the wheel side in the state where the hub bearing is assembled, and corresponds to the left side in fig. 1. Conversely, "inner" means the vehicle width direction center side in a state where the hub bearing unit is assembled, and corresponds to the right side of fig. 1. With respect to the radial direction, "outer" means a side away from the axis of the hub bearing, and "inner" means a side close to the axis of the hub bearing.
First, the hub bearing according to the present invention will be described. Fig. 1 is a longitudinal sectional view showing a hub bearing for supporting a wheel of an automobile to which the seal ring according to the present invention and the prior art can be applied. In addition, the hub bearing to which the seal ring of the present invention can be applied is not limited to this, and the seal ring of the present invention can be applied to other hub bearings.
As shown in fig. 1, the hub bearing includes: an outer member 5 as an outer ring, which has a plurality of rows (for example, two rows) of outer ring raceways 5a integrally formed on an inner peripheral surface thereof; an inner member 3 including a hub main shaft 1 and an inner ring 2 press-fitted into the hub main shaft 1, and having a plurality of rows (for example, two rows) of inner ring raceways 1a and 2a formed on an outer circumferential surface thereof, the inner ring raceways being opposed to the plurality of rows of outer ring raceways 5a, respectively; and a plurality of rows (for example, two rows) of rolling elements 4 rollably accommodated between the raceways of the inner member 3 and the outer member 5. A flange portion 6 protruding radially outward for mounting a wheel via a brake disc is integrally formed on the inner member 3, and bolt holes 8 through which bolts 6a for fastening the wheel are inserted are provided at circumferentially equidistant positions of the flange portion 6. Further, light-weight holes 13 for reducing the weight are provided between the bolt holes 8 of the flange portion 6. Further, an outer seal ring 20 and an inner seal ring 30 are attached to both ends of the inner member 3 and the outer member 5, respectively, in order to prevent foreign matter such as muddy water from entering the inside. In fig. 1, the outer seal ring 20 and the inner seal ring 30 are schematically illustrated, and the outer seal ring 20, which is a main part of the present invention, will be described in detail with reference to fig. 2.
Next, the combined seal ring for the hub bearing wheel side of the present embodiment will be explained. Fig. 2 is an enlarged view of a main portion of the seal ring of the present invention with respect to fig. 1, and the combined seal ring for the hub bearing wheel side of the present embodiment is specifically an outer seal ring 20.
As shown in fig. 2, the outer seal ring 20 includes a 1 st seal ring 21 fitted around and fixed to the axially outer end of the outer member 5, and a 2 nd seal ring 25 fitted around and fixed to the hub spindle 1. The 1 st seal ring 21 includes a 1 st metal shell 22 and a 1 st seal member 23, and the 1 st metal shell 22 includes a 1 st main body portion 22a surrounding a part of the outer peripheral surface of the outer member 5 and the axially outer end surface, an inclined portion 22b extending from the radially inner end of the 1 st main body portion 22a to the radially inner side and obliquely to the axially inner side, and a 1 st extending portion 22c extending from the radially inner end of the inclined portion 22b to the further radially inner side. The 1 st seal member 23 is integrally attached to the outer surface of the 1 st metal frame 22 along the entire 1 st metal frame 22 by means of a usual vulcanization adhesion or the like.
The 2 nd seal ring 25 includes a 2 nd metal frame 26 and a 2 nd seal member 27, and the 2 nd metal frame 26 includes a horizontal portion 26a fitted to the hub main shaft 1, a 2 nd main body portion 26b extending from an axially outer end of the horizontal portion 26a to a radially outer side and obliquely to the axially outer side, and a 2 nd extending portion 26c extending from a radially outer end of the 2 nd main body portion 26b to a further radially outer side. The 2 nd seal member 27 is integrally attached to the outer surfaces of the 2 nd extending portion 26c and the 2 nd body portion 26b of the 2 nd metal shell 26 and a part of the inner surface of the radially outer end of the 2 nd extending portion 26c by a usual vulcanization adhesion or the like.
In the 1 st extension portion 22c of the 1 st metal skeleton 22, the 1 st seal member 23 is formed with: a 1 st seal lip 23a which extends from a radially inner end of the 1 st extending portion 22c to an axially inner side and extends obliquely to the radially inner side, and which elastically contacts a horizontal portion 26a of a 2 nd metal skeleton 26 of a 2 nd seal ring 25; a 2 nd seal lip 23b which extends from a radially inner end of the 1 st extending portion 22c to an axially outer side and to a radially outer side obliquely and which elastically contacts a 2 nd main body portion 26b of a 2 nd metal skeleton 26 of the 2 nd seal ring 25; and a 1 st side lip 23c located above the 2 nd seal lip 23b with a gap therebetween, a 2 nd extending portion 26c facing the 2 nd metal skeleton 26, extending substantially in parallel with the 2 nd seal lip 23b, obliquely outward in the axial direction and outward in the radial direction, and having a gap with the 2 nd seal ring 25.
Further, in the vicinity of the radially outer end of the 1 st body portion 22a of the 1 st metal shell 22 near the corner portion, the 1 st seal member 23 is formed with a stopper 23d extending obliquely axially outward and radially outward and leaving a gap with the flange portion 6. The blocking edge 23d prevents foreign matter such as muddy water from directly entering.
The 2 nd seal member 27 has a 2 nd side lip 27a formed at the radially outer end of the 2 nd extending portion 26c of the 2 nd metal skeleton 26, and the 2 nd side lip 27a extends above the 1 st side lip 23c of the 1 st seal member 23 substantially in parallel with the 1 st side lip 23c toward the 1 st extending portion 22c of the 1 st metal skeleton 22 obliquely inward in the axial direction and inward in the radial direction, and has a gap with the 1 st seal ring 21.
According to the 1 st seal ring 21 and the 2 nd seal ring 25 formed in this way, first, a first labyrinth structure is formed between the flange 23d of the 1 st seal member 23 of the 1 st seal ring 21 and the inner side surface of the flange portion 6 of the hub bearing. Next, a plurality of labyrinth seal structures are formed between the 1 st seal ring 21 and the 2 nd seal ring 25, that is, labyrinth seal structures are formed between a portion of the 1 st seal member 23 at the inclined portion 22b of the 1 st metal skeleton 22 and the 2 nd side lip 27a of the 2 nd seal member 27, between the 2 nd side lip 27a of the 2 nd seal member 27 and a portion of the 1 st seal member 23 at the 1 st extending portion 22c of the 1 st metal skeleton 22, and between the 1 st side lip 23c of the 1 st seal member 23 and the 2 nd extending portion 26c of the 2 nd metal skeleton 26, respectively.
As shown in fig. 2, the 2 nd metal skeleton 26 is in contact with the horizontal outer peripheral surface of the hub main shaft 1 only at the horizontal portion 26a, and the 2 nd metal skeleton 26 is not in contact with the inner surface of the flange portion 6 of the hub main shaft 1, so that a gap is formed between the 2 nd metal skeleton 26 and the inner surface of the flange portion 6. However, in practice, a transition portion is formed between the outer peripheral surface of the hub main shaft 1 and the inner side surface of the flange portion 6, and the 2 nd metal skeleton 26 does not contact the inner side surface of the flange portion 6 of the hub main shaft 1 and the transition portion. The 2 nd seal member 27 has a 3 rd seal lip 27b formed at the radially outer end of the 2 nd extending portion 26c of the 2 nd metal skeleton 26, and the 3 rd seal lip 27b extends obliquely axially outward and radially outward and elastically contacts the inner surface of the flange portion 6 of the hub spindle 1 to close the gap.
Further, when the maximum diameter at the tip of the 1 st side lip 23c of the 1 st seal member 23 is Φ a and the maximum diameter at the tip of the 2 nd side lip 27a of the 2 nd seal member 27 is Φ B, Φ a < Φ B.
Next, the effects obtained by the outer seal ring 20 of the present embodiment will be described.
In the present embodiment, the seal lips (i.e., the 1 st seal lip 23a and the 2 nd seal lip 23b) of the 1 st seal ring 21 are not in contact with the hub spindle 1, but in contact with the 2 nd metal skeleton 26 of the 2 nd seal ring 25, so that the lip suction effect caused by the engagement of the seal lips with the hub spindle can be improved, and the friction torque can be reduced. In addition, the 1 st seal ring 21 has only two seal lips (i.e., the 1 st seal lip 23a and the 2 nd seal lip 23b) in contact with the 2 nd metal skeleton 26 of the 2 nd seal ring 25, and the friction torque can be reduced by reducing the contact surface pressure and the contact area as compared with the case of three-lip contact as shown in fig. 3 and the reference 1.
Further, as described above, the multi-path labyrinth structure is formed between the 1 st seal ring 21 and the 2 nd seal ring 25, so that the sealing performance is improved, and the intrusion of muddy water or the like can be prevented. Further, the 1 st seal member 23 is formed in the vicinity of the corner portion of the radially outer end of the 1 st body portion 22a of the 1 st metal shell 22, and has a stopper 23d extending obliquely axially outward and radially outward and leaving a gap with the flange portion 6, thereby forming a labyrinth seal structure with the flange portion 6, and preventing the ingress of foreign matter such as muddy water.
In addition, the 2 nd metal skeleton 26 of the 2 nd seal ring 25 is only matched with the shaft diameter of the hub spindle 1 and is not contacted with the flange part 6. Thus, when a bending moment load is applied to the hub bearing during use, the hub bearing can be prevented from moving in the axial direction. And therefore the reliability of use is high.
Further, since the 2 nd seal member 27 further has the 3 rd seal lip 27b elastically contacting the flange portion 6 formed at the radially outer end of the 2 nd extending portion 26c of the 2 nd metal skeleton 26, it is possible to ensure the sealing property.
Further, when the maximum diameter at the tip of the 1 st side lip 23c of the 1 st seal member 23 is Φ a and the maximum diameter at the tip of the 2 nd side lip 27a of the 2 nd seal member 27 is Φ B, Φ a < Φ B. Therefore, in the rotating process of the hub bearing, the pump effect is generated in the labyrinth internal environment of the labyrinth seal structure under the action of the centrifugal force, and the function of promoting the discharge of muddy water can be achieved.
Therefore, according to the present embodiment, the combined seal ring for the hub bearing wheel side can be provided with further improved friction performance, sealing performance, and use reliability.
The above description has been given only for the details of the preferred embodiments of the present invention. Various modifications and additions may be made to the described embodiments or may be substituted in a similar manner by those skilled in the art, and the technical scope of the present invention is to be determined by the claims, and the meaning equivalent to the description of the claims and all modifications within the scope thereof are intended to be included.
Claims (3)
1. A unitized seal ring for a hub bearing wheel side, the hub bearing comprising: an outer member having a plurality of rows of outer ring raceways integrally formed on an inner circumferential surface thereof; an inner member including a hub main shaft and an inner ring press-fitted into the hub main shaft, the inner member having a plurality of inner ring raceways formed on an outer circumferential surface thereof, the inner ring raceways facing the plurality of outer ring raceways, and a flange portion formed at an axially outer end of the hub main shaft for fixing a wheel of an automobile; a plurality of rows of rolling elements rollably accommodated between raceways of the inner member and the outer member; and a seal ring including an inner seal ring and an outer seal ring, both ends of the outer member being respectively fitted between the outer member and the inner member, wherein the hub bearing wheel-side combination seal ring is the outer seal ring, and is composed of a 1 st seal ring fitted around and fixed to an axially outer end of the outer member and a 2 nd seal ring fitted around and fixed to the hub spindle,
the 1 st seal ring includes a 1 st metal shell and a 1 st seal member, the 1 st metal shell includes a 1 st main body portion surrounding a part of an outer peripheral surface and an axially outer end surface of the outer member, an inclined portion extending obliquely radially inward and axially inward from a radially inner end of the 1 st main body portion, and a 1 st extending portion extending further radially inward from a radially inner end of the inclined portion, the 1 st seal member is integrally attached to an outer surface of the 1 st metal shell along the entire 1 st metal shell,
the 2 nd seal ring includes a 2 nd metal skeleton and a 2 nd seal member, the 2 nd metal skeleton includes a horizontal portion that fits with the hub main shaft, a 2 nd main body portion that extends radially outward and axially outward obliquely from an axial outer end of the horizontal portion, and a 2 nd extending portion that further extends radially outward from a radial outer end of the 2 nd main body portion, the 2 nd seal member is integrally attached to an outer surface of the 2 nd extending portion and the 2 nd main body portion of the 2 nd metal skeleton, a part of an inner surface of a radial outer end of the 2 nd extending portion,
in the 1 st extension of the 1 st metal skeleton, the 1 st sealing member is formed with: a 1 st seal lip extending obliquely axially inward and radially inward from a radially inner end of the 1 st extension, and elastically contacting a horizontal portion of a 2 nd metal skeleton of the 2 nd seal ring; a 2 nd seal lip which extends from a radially inner end of the 1 st extension portion to an axially outer side and to a radially outer side obliquely and which elastically contacts a 2 nd main body portion of a 2 nd metal skeleton of the 2 nd seal ring; a 1 st side lip which is located above the 2 nd seal lip with a gap therebetween, extends obliquely axially outward and radially outward toward a 2 nd extending portion of the 2 nd metal skeleton with a gap therebetween, and a stopper edge which extends obliquely axially outward and radially outward near a corner portion at a radially outer end of a 1 st main body portion of the 1 st metal skeleton with a gap therebetween,
a 2 nd side lip is formed on the 2 nd seal member at a radially outer end of a 2 nd extension portion of the 2 nd metal skeleton, the 2 nd side lip is above the 1 st side lip of the 1 st seal member, extends obliquely to an axially inner side and a radially inner side toward a 1 st extension portion of the 1 st metal skeleton, and has a gap with the 1 st seal ring,
and a multi-path labyrinth seal structure is formed between the 1 st sealing ring and the 2 nd sealing ring.
2. The unitized seal ring for a hub bearing wheel side according to claim 1,
the 2 nd metal framework of the 2 nd sealing ring is not contacted with the flange part of the hub main shaft, a gap is formed between the 2 nd metal framework and the flange part,
the 2 nd seal member further has a 3 rd seal lip formed at a radially outer end of the 2 nd extending portion of the 2 nd metal skeleton, the 3 rd seal lip extending obliquely axially outward and radially outward and being in elastic contact with the flange portion of the hub spindle.
3. The unitized seal ring for a hub bearing wheel side according to claim 1 or 2,
when the maximum diameter at the tip of the 1 st side lip of the 1 st seal member is represented by Φ A and the maximum diameter at the tip of the 2 nd side lip of the 2 nd seal member is represented by Φ B, Φ A < Φ B.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020523073.XU CN211975684U (en) | 2020-04-10 | 2020-04-10 | Combined sealing ring for hub bearing wheel side |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020523073.XU CN211975684U (en) | 2020-04-10 | 2020-04-10 | Combined sealing ring for hub bearing wheel side |
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| CN211975684U true CN211975684U (en) | 2020-11-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653739A (en) * | 2021-07-26 | 2021-11-16 | 人本股份有限公司 | Impact-resistant sealing structure of hub bearing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653739A (en) * | 2021-07-26 | 2021-11-16 | 人本股份有限公司 | Impact-resistant sealing structure of hub bearing |
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