阅读说明：本技术 一种三片骨架式密封组件 (Three-piece framework type sealing assembly ) 是由 汪峰 周旭 赵丽娜 于 2020-12-09 设计创作，主要内容包括：本发明公开了一种三片骨架式密封组件,主要包括骨架A等,外圈口部设置骨架A,骨架A外包有外包橡胶,骨架A上设置橡胶凸起,橡胶凸起在压装时与外圈紧密贴合,法兰盘口部设置骨架B和骨架C,骨架A的唇口A与骨架B、骨架C间形成空腔D,唇口B、唇口C与骨架C间形成空腔C,唇口C、唇口D与骨架C间形成空腔B,骨架A和骨架B、骨架C配合形成具有狭长迷宫式密封通道。本发明通过密封组件内部结构设计减小由于泥水通过转动骨架与法兰盘间的空隙渗入滚道而造成的油脂污染和油脂外溢的风险,提高了密封性能,同时通过迷宫效应增加泥水侵入路径难度,抵挡了泥水侵入密封腔体,两者共同作用产生高效的动态密封。(The invention discloses a three-piece framework type sealing assembly which mainly comprises a framework A and the like, wherein a framework A is arranged at the opening part of an outer ring, an outer rubber is wrapped outside the framework A, a rubber bulge is arranged on the framework A, the rubber bulge is tightly attached to the outer ring during press mounting, a framework B and a framework C are arranged at the opening part of a flange plate, a cavity D is formed among a lip A of the framework A, the framework B and the framework C, a cavity C is formed among the lip B, the lip C and the framework C, a cavity B is formed among the lip C, the lip D and the framework C, and the framework A, the framework B and the framework C are matched to form a long and narrow labyrinth type sealing channel. According to the invention, through the internal structural design of the sealing assembly, the risks of grease pollution and grease overflow caused by the fact that muddy water permeates into the raceway through the gap between the rotating framework and the flange plate are reduced, the sealing performance is improved, the difficulty of a muddy water invasion path is increased through a labyrinth effect, the muddy water invasion into the sealing cavity is resisted, and efficient dynamic sealing is generated under the combined action of the muddy water and the sealing cavity.)

1. A novel three-piece skeletal seal assembly is characterized in that: mainly comprises a framework A (1), outsourcing rubber (2), a framework B (3), a framework C (4), rubber bulges (5), a lip A (6), a lip B (7), a lip C (8), a lip D (9), a cavity A (10), a cavity B (11), a cavity C (12), a cavity D (13), an outer ring (15), a gap (16), a flange (17), a raceway (18) and steel balls (19), wherein the raceway (18) is formed between the outer ring (15) and the flange (17), the steel balls (19) are arranged in the raceway (18), the framework A (1) is arranged at the opening part of the outer ring (15), the outsourcing rubber (2) is arranged outside the framework A (1), the rubber bulges (5) are arranged on the framework A (1), the rubber bulges (5) are tightly attached to the outer ring (15) in the press fitting process, the framework B (3) and the framework C (4) are arranged at the opening part of, a gap (16) is formed between an outer ring (15) and a flange (17), a cavity A (10) is formed on the outer side of a roller path (18), a lip A (6), a lip B (7), a lip C (8) and a lip D (9) are arranged on the outer rubber wrapping (2) of a framework A (1), a cavity D (13) is formed between the lip A (6) and the framework B (3) and the framework C (4), a cavity C (12) is formed between the lip B (7), the lip C (8) and the framework C (4), a cavity B (11) is formed between the lip C (8), the lip D (9) and the framework C (4), the lip D (9) is used as an oil blocking lip, a labyrinth long and narrow sealing channel is formed by matching the framework A (1), the framework B (3) and the framework C (4), and the cavity D (13) is communicated with the outside through the labyrinth sealing channel.

2. The novel three-piece skeletal seal assembly of claim 1, wherein: and a diversion trench (14) is arranged on the outer side of the outer ring (15).

3. The novel three-piece skeletal seal assembly of claim 1, wherein: and an adhesive is used between the framework B (3) and the framework C (4).

4. The novel three-piece skeletal seal assembly of claim 1, wherein: the lip C (8) is in contact with the framework C (4) in a natural state.

Technical Field

The invention relates to the field of hub bearing units, in particular to a three-piece framework type sealing assembly.

Background

Hub bearings are automobile parts that carry weight and provide precise guidance for the rotation of the hub. The hub bearing in the prior art has poor sealing performance, grease pollution and grease overflow caused by muddy water permeating into the raceway through a gap between the rotating framework and the flange plate are avoided, the service life of a product is greatly shortened, and the maintenance cost is improved.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a three-piece framework type sealing assembly.

The purpose of the invention is achieved by the following technical scheme: the three-piece framework type sealing assembly mainly comprises a framework A, outer packing rubber, a framework B, a framework C, rubber protrusions, a lip A, a lip B, a lip C, a lip D, a cavity A, a cavity B, a cavity C, a cavity D, an outer ring, a gap, a flange plate, a raceway and a steel ball, wherein the raceway is formed between the outer ring and the flange plate, the steel ball is installed in the raceway, the framework A is arranged at the opening of the outer ring, the outer packing rubber is wrapped outside the framework A, the rubber protrusions are arranged on the framework A and are tightly attached to the outer ring in press fitting, the framework B and the framework C are arranged at the opening of the flange plate, the gap is formed between the outer ring and the flange plate, the cavity A is formed outside the raceway, the lip A, the lip B, the lip C and the lip D are arranged on the outer packing rubber of the framework A, the lip B, the cavity D is formed between the lip A and the framework B, the framework C, the, A cavity B is formed between the lip D and the framework C, the lip D is used as an oil blocking lip, the framework A, the framework B and the framework C are matched to form a long and narrow labyrinth type sealing channel, and the cavity D is communicated with the outside through the labyrinth type sealing channel.

And a diversion trench is arranged on the outer side of the outer ring.

And an adhesive is used between the framework B and the framework C.

The lip mouth C is contacted with the framework C in a natural state.

The invention has the beneficial effects that: according to the invention, through the internal structural design of the sealing assembly, the risks of grease pollution and grease overflow caused by the fact that muddy water permeates into the raceway through the gap between the rotating framework and the flange plate are reduced, the sealing performance is improved, the difficulty of a muddy water invasion path is increased through a labyrinth effect, the muddy water invasion into the sealing cavity is resisted, and efficient dynamic sealing is generated under the combined action of the muddy water and the sealing cavity.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic view of the skeleton A of the present invention.

FIG. 3 is a schematic view of the skeleton B of the present invention.

FIG. 4 is a schematic view of the skeleton C of the present invention.

Description of reference numerals: skeleton A1, outsourcing rubber 2, skeleton B3, skeleton C4, rubber bulge 5, lip A6, lip B7, lip C8, lip D9, cavity A10, cavity B11, cavity C12, cavity D13, guiding gutter 14, outer lane 15, gap 16, flange 17, raceway 18 and steel ball 19.

Detailed Description

The invention will be described in detail below with reference to the following drawings:

example (b): as shown in the attached drawings, the three-piece framework type sealing assembly mainly comprises a framework A1, outer rubber 2, a framework B3, a framework C4, a rubber bulge 5, a lip A6, a lip B7, a lip C8, a lip D9, a cavity A10, a cavity B11, a cavity C12, a cavity D13, an outer ring 15, a gap 16, a flange 17, a raceway 18 and a steel ball 19, wherein a diversion trench 14 is formed in the outer side of the outer ring 15. A raceway 18 is formed between the outer ring 15 and the flange plate 17, a steel ball 19 is mounted in the raceway 18, a framework A1 is arranged at the opening of the outer ring 15, an outer wrapping rubber 2 is wrapped outside a framework A1, a rubber bulge 5 is arranged on the framework A1, and the rubber bulge 5 is tightly attached to the outer ring 15 during press fitting, so that the gap between the framework A1 and the outer ring 15 is reduced, and the relative movement between the static framework A1 and the outer ring 15 can also be reduced. A framework B3 and a framework C4 are arranged at the opening of the flange plate 17, a gap 16 is formed between the outer ring 15 and the flange plate 17, a cavity A10 is formed outside the raceway 18, a lip A6, a lip B7, a lip C8 and a lip D9 are arranged on the outer rubber 2 of the framework A1, a cavity D13 is formed between the lip A6 and the framework B3 and between the framework C4, a cavity C12 is formed between the lip B7 and between the lip C8 and the framework C4, a cavity B11 is formed between the lip C8 and between the lip D9 and the framework C4, and the lip C8 is in contact with the framework C4 in a natural state and serves as a first lip defense line in a sealed cavity. Lip D9 acts as a grease stop lip to prevent leakage of grease in raceway 18 and to prevent mixing with grease added in cavity B11 in the areas of lip C8 and lip D9. Framework A1, framework B3 and framework C4 are matched to form a long and narrow labyrinth passage, and cavity D13 is communicated with the outside through the labyrinth passage. And an adhesive is used between the framework B3 and the framework C4, so that a sealing effect is achieved, water or impurities are effectively prevented from entering the interior of the hub bearing, and the sealing performance is further optimized.

The working principle of the invention is as follows: in the use environment where a large amount of muddy water exists, the splashed muddy water is firstly thrown out along the guide grooves 14 on the outer ring 15 during the rotation of the bearing. Meanwhile, a gap 16 exists between the outer ring 15 and the flange plate 17, under high-speed rotation, most of water flow entering the gap 16 is thrown out along the surface of the flange plate 17, and a small part of water enters the cavity A10 for short-time retention and is discharged under the action of centrifugal force. When a large amount of muddy water gushes in, water or impurities entering from the outside can be accumulated for a short time through the guiding of the labyrinth type sealing channel of the cavity D13, the water or the impurities entering from the outside are prevented from entering the cavity C12, and a certain buffering function is achieved. The sealing passage formed by the lip B7 and the skeleton C4 is further guided to guide muddy water which is not temporarily stored in the cavity D13 into the cavity C12. According to the invention, the skeleton A1 and the lip are matched, the narrow sealing channel is arranged, the length of a muddy water invasion path is increased, the muddy water invasion difficulty is further increased, and only less water flow can enter the sealing channel. Meanwhile, under the high-speed rotation of the bearing, water entering the channel can be thrown out along the rotating framework.

It should be understood that equivalent substitutions and changes to the technical solution and the inventive concept of the present invention should be made by those skilled in the art to the protection scope of the appended claims.