CN217682878U

CN217682878U - Novel low torque guide formula seal assembly

Info

Publication number: CN217682878U
Application number: CN202221086341.1U
Authority: CN
Inventors: 陈伟军; 汪峰
Original assignee: Wanxiang Group Corp; Zhejiang Wanxiang Precision Industry Co Ltd
Current assignee: Wanxiang Group Corp; Zhejiang Wanxiang Precision Industry Co Ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-10-28
Anticipated expiration: 2032-05-06

Abstract

The utility model discloses a novel low-torque guide type sealing assembly, which relates to the field of hub bearings and comprises a static framework and a rotating framework, wherein the static framework is coated with outsourcing rubber, the rotating framework is coated with magnetic rubber, and a muddy water inlet A is formed between the outsourcing rubber and the magnetic rubber; the magnetic rubber is provided with guide bulges A, B at intervals, and the outer rubber is provided with lips A, B, C, D at intervals; a cavity A is formed between the lip A and the outer rubber, and a muddy water inlet B is formed between the flow guide bulge A and the lip A; a cavity B is formed between the lip B and the lip A, and a muddy water inlet C is formed between the flow guide bulge B and the lip B; a cavity C is formed between the lip C and the lip B; a cavity D is formed between the lip D and the lip C. The utility model discloses increase the path length that muddy water invaded, produce the labyrinth effect, and then increase the degree of difficulty that muddy water invaded, reduce muddy water invasion infiltration raceway and the grease that causes pollute and grease excessive risk, improve sealing performance.

Description

Novel low-torque guide type sealing assembly

Technical Field

The utility model relates to a field of wheel hub bearing, concretely relates to novel low torque guide formula seal assembly.

Background

In the hub bearing sealing structure in the prior art, a plurality of lips are adopted to be in contact with the rotating framework, so that larger friction torque is easily caused. The risks that muddy water penetrates into the raceway through a gap between the rotating framework and the static framework in the rotating process, so that the muddy water enters the raceway to lose effectiveness, and the grease is polluted and spilled over exist. Simultaneously, prior art lacks the water conservancy diversion structure, is unfavorable for guiding the invasion muddy water and stores, flows.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a novel low torque guide formula seal assembly, increase the path length that muddy water invades, produce the labyrinth effect, and then increase the degree of difficulty that muddy water invades, reduce muddy water invasion infiltration raceway and the grease pollution that causes and the excessive risk of grease, improve sealing performance. Meanwhile, a flow guide structure is additionally arranged to guide the invading muddy water to be stored and flow out temporarily.

The purpose of the utility model is accomplished through following technical scheme: the novel low-torque guide type sealing assembly is arranged at the opening parts of an outer ring and an inner ring of a hub bearing, a raceway is formed between the outer ring and the inner ring and used for placing a roller, the sealing assembly comprises a static framework arranged on the outer ring and a rotating framework arranged on the inner ring, the static framework is coated with outer coated rubber, the rotating framework is coated with magnetic rubber, and the outer coated rubber is matched with the magnetic rubber and forms a muddy water inlet A at the end part of the static framework; flow guide bulges A and flow guide bulges B are arranged on the magnetic rubber at intervals, and lips A, lips B, lips C and lips D are arranged on the outer wrapping rubber at intervals; the lip A is arranged towards the flow guide bulge A, a cavity A is formed between the lip A and the outer rubber, and is used for containing muddy water flowing from the muddy water inlet A, and a muddy water inlet B is formed between the flow guide bulge A and the lip A; the lip B is arranged towards the flow guide bulge B, a cavity B is formed between the lip B and the lip A and used for containing muddy water flowing from the muddy water inlet B, and a muddy water inlet C is formed between the flow guide bulge B and the lip B; the lip C is in contact with the rotating framework in a natural state for sealing, and a cavity C is formed between the lip C and the lip B and is used for containing muddy water flowing from the muddy water inlet C; the lip D and the rotating framework are sealed in an interference fit mode, a cavity D is formed between the lip D and the lip C, and the cavity D is sealed with the roller path through the lip D.

Preferably, the outer rubber is in interference fit with the mouth of the outer ring.

As a further technical scheme, the flow guide bulge A is arranged at the tail end of the muddy water inlet A and used for guiding muddy water to enter the cavity A.

As a further technical scheme, the flow guide bulge B is arranged above the lip opening B and used for guiding muddy water to enter the cavity B.

As a preferable technical scheme, grease is filled in the lip C and the lip D for lubrication.

Preferably, the width W1 of the muddy water inlet a is not more than 1mm.

Preferably, the width W2 of the muddy water inlet B is less than or equal to 1mm.

Preferably, the width W3 of the muddy water inlet C is not more than 1mm.

As a further technical scheme, the lip A is arranged in the interval between the flow guide bulge A and the flow guide bulge B, and a labyrinth passage is formed by matching the lip A with the flow guide bulge B.

The utility model has the advantages that: on the premise of ensuring the sealing performance, the lip-less design of the two lips is arranged, so that the friction torque can be effectively reduced. Through novel labyrinth structure design, increase the path length of muddy water invasion, produce the labyrinth effect, if water is inside will getting into the bearing simultaneously, need fill up whole sealing washer, if the outside is narrow and small, inside the bearing could be got into in the direction of the anti gravity of water rethread, further increased the degree of difficulty that muddy water invaded, reduced muddy water invasion infiltration raceway and the grease that causes pollute and grease excessive risk, improve sealing performance, reach low torque, lip less, the purpose of high leakproofness. Add the water conservancy diversion arch, the guide invasion muddy water gets into the cavity and stores for a short time to and the guide gets into seal structure's muddy water outflow.

Drawings

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

Fig. 2 is a partially enlarged schematic view of a region a in fig. 1.

Description of reference numerals: the device comprises a static framework 1, a rotating framework 2, an outer rubber coating 3, a magnetic rubber 4, a lip A5, a lip B6, a lip C7, a lip D8, a flow guide protrusion A9, a flow guide protrusion B10, a cavity A11, a cavity B12, a cavity C13, a cavity D14, an outer ring 15, an inner ring 16, a raceway 17, a roller 18, a muddy water inlet A19, a muddy water inlet B20, a muddy water inlet C21 and a labyrinth passage 22.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

example (b): as shown in fig. 1 and 2, the novel low-torque guide type sealing assembly is arranged at the mouths of an outer ring 15 and an inner ring 16 of a hub bearing, a raceway 17 is formed between the outer ring 15 and the inner ring 16 and used for placing a roller 18, the sealing assembly comprises a static skeleton 1 arranged on the outer ring 15 and a rotating skeleton 2 arranged on the inner ring 16, the static skeleton 1 is coated with an outer coating rubber 3 (preferably, the outer coating rubber 3 is in interference fit with the mouth of the outer ring 15), the rotating skeleton 2 is coated with a magnetic rubber 4, and the outer coating rubber 3 is matched with the magnetic rubber 4 and forms a muddy water inlet a19 at the end of the static skeleton 1. The magnetic rubber 4 is provided with flow guide bulges A9 and flow guide bulges B10 at intervals, and the flow guide bulges A9 are arranged at the tail end of the muddy water inlet A19 and used for guiding muddy water to enter the cavity A11. A lip A5, a lip B6, a lip C7 and a lip D8 are arranged on the outer rubber 3 at intervals; the lip A5 is disposed toward the guide protrusion A9 (preferably, the lip A5 is disposed in the space between the guide protrusion A9 and the guide protrusion B10, and a labyrinth passage 22 is formed between the three, as shown in fig. 2), a cavity a11 is formed between the lip A5 and the outer rubber 3 for accommodating muddy water gushing from the muddy water inlet a19, and a muddy water inlet B20 is formed between the guide protrusion A9 and the lip A5. The lip B6 is arranged towards the flow guide bulge B10, a cavity B12 is formed between the lip B6 and the lip A5 and used for containing muddy water gushing from the muddy water inlet B20, and the flow guide bulge B10 is arranged above the lip B6 and used for guiding the muddy water to enter the cavity B12. A muddy water inlet C21 is formed between the guide projection B10 and the lip B6, as shown in fig. 1, the lip C7 is in contact sealing (interference fit) with the rotating skeleton 2, and a cavity C13 is formed between the lip C7 and the lip B6 for containing muddy water gushed from the muddy water inlet C21. The lip D8 is sealed with the rotating framework 2 in an interference fit mode, a cavity D14 is formed between the lip D8 and the lip C7, and the cavity D14 is sealed with the roller path 17 through the lip D8. Preferably, the lips C7 and D8 on both sides of the cavity D14 are filled with grease for lubrication, so as to prevent external muddy water from directly entering the inside of the bearing, prevent a large amount of grease in the raceway from leaking, and improve the sealing performance.

Referring to fig. 2, preferably, the width W1 of the muddy water inlet a19 is 1mm or less. The width W2 of the muddy water inlet B20 is less than or equal to 1mm. The width W3 of the muddy water inlet C21 is less than or equal to 1mm.

The utility model discloses a working process:

the outer rubber 3 coated on the static framework 1 is in press fit with the outer ring 15 to form pre-sealing, so that muddy water dust can be prevented from entering the raceway 17 preliminarily. The magnetic rubber 4 coated on the rotating framework 2 and the static framework 1 form a narrow inlet (namely a muddy water inlet A19), the flow guide protrusion A9 on the magnetic rubber 4 guides water to enter a cavity A11 formed by a lip A5 structure of the static framework 1 when muddy water invades, and the cavity A11 can be used for temporarily storing water when a large amount of muddy water invades, so that the water is prevented from directly entering the sealed cavity B12. Meanwhile, the guide bulge A9 and the lip A5 form a narrow inlet (namely a muddy water inlet B20) to prevent the muddy water from further invading. A narrow labyrinth passage 22 is formed between the lip A5 and the flow guide bulge A9 and between the lip A and the flow guide bulge B10, so that the path length of muddy water intrusion is increased, and the difficulty of muddy water intrusion is further increased. The muddy water entering the labyrinth passage 22 enters the cavity B12 for short storage under the guidance of the guide projection B10. The flow guide bulge B10 and the lip opening B6 form a narrow channel (namely a muddy water inlet C21) to limit muddy water from flowing in, the amount of muddy water entering the cavity C13 is further reduced through the narrow sealing channel, and meanwhile, water in the cavity C13 can be effectively discharged in time under the action of centrifugal force. The lip C7 of the static framework 1 is contacted with the rotating framework 2 in a natural state to form a cavity C13. Meanwhile, a cavity D14 is formed between the lip C7 and the lip D8 as a sealing lip. Grease is filled in the cavity D14 at the lips C7 and D8 on the two sides of the cavity for lubrication, so that external muddy water is prevented from directly entering the inside of the bearing, a large amount of grease in the raceway is prevented from leaking, and the sealing performance is improved.

It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.

Claims

1. A novel low torque guide type sealing assembly is arranged at the opening parts of an outer ring (15) and an inner ring (16) of a hub bearing, a roller path (17) is formed between the outer ring (15) and the inner ring (16) and used for placing a roller (18), and the novel low torque guide type sealing assembly is characterized in that: the muddy water inlet device comprises a static framework (1) arranged on an outer ring (15) and a rotating framework (2) arranged on an inner ring (16), wherein the static framework (1) is coated with an outer coated rubber (3), the rotating framework (2) is coated with a magnetic rubber (4), and the outer coated rubber (3) is matched with the magnetic rubber (4) and forms a muddy water inlet A (19) at the end part of the static framework (1); the magnetic rubber (4) is provided with flow guide bulges A (9) and flow guide bulges B (10) at intervals, and the outer rubber (3) is provided with lips A (5), lips B (6), lips C (7) and lips D (8) at intervals; the lip A (5) is arranged towards the flow guide bulge A (9), a cavity A (11) is formed between the lip A (5) and the outer coated rubber (3) and used for containing muddy water flowing from the muddy water inlet A (19), and a muddy water inlet B (20) is formed between the flow guide bulge A (9) and the lip A (5); the lip B (6) is arranged towards the flow guide bulge B (10), a cavity B (12) is formed between the lip B (6) and the lip A (5) and is used for containing muddy water gushing from the muddy water inlet B (20), and a muddy water inlet C (21) is formed between the flow guide bulge B (10) and the lip B (6); the lip C (7) is in contact with the rotating framework (2) in a natural state for sealing, and a cavity C (13) is formed between the lip C (7) and the lip B (6) and is used for containing muddy water flowing from the muddy water inlet C (21); lip D (8) and rotate between skeleton (2) interference fit seal, form cavity D (14) between lip D (8) and lip C (7), cavity D (14) pass through lip D (8) with raceway (17) are sealed.

2. The novel low torque pilot seal assembly of claim 1, wherein: the outer rubber (3) is in interference fit with the opening of the outer ring (15).

3. The novel low torque pilot seal assembly of claim 1, wherein: the flow guide bulge A (9) is arranged at the tail end of the muddy water inlet A (19) and used for guiding muddy water to enter the cavity A (11).

4. The novel low torque pilot seal assembly of claim 1, wherein: the flow guide bulge B (10) is arranged above the lip opening B (6) and used for guiding muddy water to enter the cavity B (12).

5. The novel low torque pilot seal assembly of claim 1, wherein: and grease is filled in the lip C (7) and the lip D (8) for lubrication.

6. The novel low torque pilot seal assembly of claim 1, wherein: the width W1 of the muddy water inlet A (19) is less than or equal to 1mm.

7. The novel low torque pilot seal assembly of claim 1, wherein: the width W2 of the muddy water inlet B (20) is less than or equal to 1mm.

8. The novel low torque pilot seal assembly of claim 1, wherein: the width W3 of the muddy water inlet C (21) is less than or equal to 1mm.

9. The novel low torque pilot seal assembly of claim 1, wherein: the lip A (5) is arranged in the interval between the flow guide bulge A (9) and the flow guide bulge B (10), and a labyrinth passage (22) is formed by matching the lip A with the flow guide bulge B.