CN212804228U

CN212804228U - Double-seal ring waterproof sealing structure

Info

Publication number: CN212804228U
Application number: CN202021803454.XU
Authority: CN
Inventors: 王清华; 贺先兵; 王英喆; 张苏北; 方道霖
Original assignee: Bafang Electric Suzhou Co Ltd
Current assignee: Bafang Electric Suzhou Co Ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-03-26
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses a double-sealing ring waterproof sealing structure, which comprises two sealing rings, wherein the sealing rings are provided with annular grooves, and the inner side ends of the sealing rings extend inwards to form a sealing inner lip which is propped against a motor shaft; the two sealing rings are vertically overlapped, the annular grooves of the two sealing rings are matched to form an oil storage cavity, the outer ends of the two sealing rings are abutted, a gap exists between the inner ends of the two sealing rings to form an oil outlet, and the oil storage cavity is communicated with the outside through the oil outlet. This seal structure can prevent that sealed inner lip and motor shaft dry grinding from causing the damage of sealed inner lip, as long as keep having lubricating oil in the oil storage chamber, the sealing washer can keep constantly having waterproof effect, so, improvement motor waterproof performance and life can be by a wide margin.

Description

Double-seal ring waterproof sealing structure

Technical Field

The utility model relates to a mechanical seal technical field, more specifically say, it relates to double containment ring waterproof sealing structure.

Background

At present, the motor of the electric bicycle and the motor of the electric motorcycle are generally sealed by a single sealing ring (namely a framework type sealing ring) on the waterproof of a motor end cover, and the mode can effectively prevent water when just assembled or in a short time; however, when the motor runs for a long time, the motor shaft and the waterproof lip of the sealing ring are dry-ground to damage the lip, and the sealing ring cannot play a waterproof role, which is why water leakage basically occurs after the motor runs for 1000-2000 kilometers.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to prior art exist not enough, the utility model discloses lie in providing double containment circle waterproof sealing structure, this seal structure can prevent that sealed inner lip and motor shaft dry grinding from arousing sealed inner lip damage, and then can improve motor waterproof performance and life.

In order to achieve the above purpose, the utility model provides a following technical scheme: the double-sealing-ring waterproof sealing structure comprises two sealing rings, wherein an annular groove is formed in each sealing ring, and a sealing inner lip which is abutted against a motor shaft extends inwards from the inner side end of each sealing ring; the two sealing rings are vertically overlapped, the annular grooves of the two sealing rings are matched to form an oil storage cavity, the outer ends of the two sealing rings are abutted, a gap exists between the inner ends of the two sealing rings to form an oil outlet, and the oil storage cavity is communicated with the outside through the oil outlet.

Before the sealing structure is assembled on a motor shaft, liquid lubricating oil is injected into an oil storage chamber of the sealing structure; the sealing structure is assembled on a motor shaft and is embedded into a groove on a motor end cover, at the moment, the sealing inner lip is abutted against the motor shaft, and lubricating oil in the oil storage chamber flows towards the direction of the motor shaft through an oil outlet, so that the sealing inner lip and the motor shaft can be lubricated; because the seal inner lip has waterproof and grease-proof effect, make the liquid lubricating oil in the oil storage cavity can not leak out, when motor shaft or sealing washer are at rotatory in-process, lubricating oil can lubricate seal inner lip and motor shaft constantly, and it can prevent that seal inner lip and motor shaft from doing the mill and causing the damage of seal inner lip, as long as keep lubricating oil in the oil storage cavity like this, the sealing washer can keep having waterproof effect always, so, improvement motor waterproof performance and life by a wide margin.

Preferably, a sealing outer lip abutting against the motor shaft extends from the inner side wall of the sealing ring, the sealing inner lip is close to the oil outlet, and the sealing outer lip is far away from the oil outlet.

Preferably, the two seal rings are integrally formed.

Preferably, the seal inner lip is in line-surface contact with the motor shaft.

Preferably, the seal outer lip is provided obliquely in the inner and outer directions of the seal ring.

Preferably, the outer seal lip is in line-surface contact with the motor shaft.

Preferably, the sealing ring comprises a sealing ring main body, a first annular plate portion extends from the outer side end of the sealing ring main body, a second annular plate portion extends from the inner side end of the sealing ring main body, the first annular plate portion and the second annular plate portion jointly form the annular groove, and one end, far away from the sealing ring main body, of the second annular plate portion extends inwards to form the sealing inner lip.

Preferably, the sealing ring is made of polytetrafluoroethylene material.

To sum up, the utility model discloses following beneficial effect has:

1. when the motor shaft or the sealing ring rotates, the lubricating oil can lubricate the inner sealing lip and the motor shaft constantly, the inner sealing lip and the motor shaft can be prevented from being damaged due to dry grinding, and the sealing ring can keep a waterproof effect as long as the lubricating oil is kept in the oil storage chamber, so that the sealing structure can greatly improve the waterproof performance and the service life of the motor;

2. the arrangement of the sealing outer lip can increase the waterproof effect on one hand; on the other hand, the leakage of the lubricating oil caused by the outflow of the lubricating oil in the oil storage chamber through the gap between the inner seal lip and the motor shaft can be reduced.

Drawings

Fig. 1 is a schematic cross-sectional view of the sealing structure of the present invention after being assembled with a motor shaft and a motor end cover;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a schematic cross-sectional view of two seal rings after assembly;

fig. 4 is a schematic structural diagram of the seal ring.

Reference numerals: 1. an annular groove; 2. a motor shaft; 3. a shaft hole; 4. sealing the inner lip; 5. an oil storage chamber; 6. a motor end cover; 7. sealing the outer lip; 8. a seal ring main body; 9. a first annular plate portion; 10. a second annular plate portion.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The embodiment discloses a double-sealing-ring waterproof sealing structure, as shown in fig. 1-4, the double-sealing-ring waterproof sealing structure comprises two sealing rings, an annular groove 1 is formed in each sealing ring, a through hole in the middle of each sealing ring forms a shaft hole 3 for a motor shaft 2 to pass through, a sealing inner lip 4 which is abutted against the motor shaft 2 extends inwards from the inner side end of each sealing ring, the two sealing rings are overlapped up and down, the annular grooves 1 of the two sealing rings are matched to form an oil storage chamber 5, the outer side ends of the two sealing rings are abutted, a gap exists between the inner side ends of the two sealing rings to form an oil outlet, and the oil storage chamber 5; in the technical scheme, the two sealing rings can be of an integrally formed structure, so that the manufacturing and the assembly are convenient; meanwhile, the seal inner lip 4 and the motor shaft 2 form line-surface contact, which can avoid seal failure caused by the fact that the seal inner lip 4 cannot effectively contact with the motor shaft 2. Before the sealing structure is assembled on the motor shaft 2, liquid lubricating oil is injected into an oil storage chamber 5 of the sealing structure; assembling the sealing structure on the motor shaft 2 and embedding the sealing structure into a groove on the motor end cover 6, wherein the sealing inner lip 4 is abutted against the motor shaft 2, and lubricating oil in the oil storage chamber 5 flows towards the motor shaft 2 through the oil outlet, so that the sealing inner lip 4 and the motor shaft 2 can be lubricated; because sealed inner lip 4 has waterproof and grease-proof effect, make the liquid lubricating oil in the oil storage cavity 5 can not leak out, when motor shaft 2 or sealing washer are at rotatory in-process, lubricating oil can lubricate sealed inner lip 4 and motor shaft 2 constantly, it can prevent that sealed inner lip 4 and motor shaft 2 dry grinding from causing the damage of sealed inner lip 4, as long as keep having lubricating oil in the oil storage cavity 5 like this, the sealing washer can keep waterproof effect always, so, improvement motor waterproof performance and life can be by a wide margin. When the motor shaft 2 rotates, the motor shaft 2 can uniformly convey lubricating oil to all parts of the sealing inner lip 4, so that the purpose of lubricating the sealing inner lip 4 is achieved, the friction main force of the motor shaft 2 and the sealing inner lip 4 can be reduced, and the service life of a sealing ring can be prolonged.

Preferably, a sealing outer lip 7 abutting against the motor shaft 2 extends on the inner side wall of the sealing ring, the sealing inner lip 4 is close to the oil outlet, and the sealing outer lip 7 is far away from the oil outlet. When the sealing structure is used, lubricating oil in the oil storage cavity 5 can flow out to the outside through gaps among the oil inlet, the sealing inner lip 4 and the motor shaft 2, so that the problem of lubricating oil leakage is caused; the arrangement of the sealing outer lip 7 can increase the waterproof effect on one hand; on the other hand, leakage of the lubricating oil caused by the lubricating oil in the oil storage chamber 5 flowing out through the gap between the seal inner lip 4 and the motor shaft 2 can be reduced. Further, the outer sealing lip 7 is obliquely arranged along the inner and outer directions of the sealing ring, and the outer sealing lip 7 is in line-surface contact with the motor shaft 2.

In addition, the sealing ring comprises a sealing ring main body 8, a first annular plate part 9 extends from the outer side end of the sealing ring main body 8, a second annular plate part 10 extends from the inner side end of the sealing ring main body 8, the first annular plate part 9 and the second annular plate part 10 are located on the same side of the sealing ring main body 8, the first annular plate part 9 and the second annular plate part 10 form an annular groove 1 together, and one end, far away from the sealing ring main body 8, of the second annular plate part 10 extends inwards to form a sealing inner lip 4.

Wherein, the sealing ring is made of polytetrafluoroethylene materials.

In the utility model, the center of the sealing ring is taken as the inner part, and the periphery of the sealing ring is taken as the outer part; it should be understood that the terms "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the present invention, and thus, should not be construed as limiting the present invention.

The directions given in the present embodiment are merely for convenience of describing positional relationships between the respective members and the relationship of fitting with each other. It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. Double containment circle waterproof sealing structure, characterized by: the motor shaft sealing device comprises two sealing rings, wherein an annular groove (1) is formed in each sealing ring, and a sealing inner lip (4) which is abutted to a motor shaft (2) extends inwards from the inner side end of each sealing ring; the two sealing rings are vertically overlapped, the annular grooves (1) of the two sealing rings are matched to form an oil storage chamber (5), the outer ends of the two sealing rings are abutted, a gap exists between the inner ends of the two sealing rings to form an oil outlet, and the oil storage chamber (5) is communicated with the outside through the oil outlet.

2. The dual seal ring waterproof sealing structure of claim 1, wherein: still extend on the inside wall of sealing washer and have sealed outer lip (7) that offsets with motor shaft (2), and sealed inner lip (4) are close to the oil-out, and sealed outer lip (7) are kept away from the oil-out.

3. The dual seal ring waterproof sealing structure according to claim 1 or 2, wherein: the two sealing rings are integrally formed.

4. The dual seal ring waterproof sealing structure of claim 1, wherein: the inner sealing lip (4) is in line-surface contact with the motor shaft (2).

5. The dual seal ring waterproof sealing structure of claim 2, wherein: the outer sealing lip (7) is obliquely arranged along the inner direction and the outer direction of the sealing ring.

6. The dual seal ring waterproof sealing structure of claim 5, wherein: the outer sealing lip (7) is in line-surface contact with the motor shaft (2).

7. The dual seal ring waterproof sealing structure of claim 1, wherein: the sealing washer includes sealing washer main part (8), and the outside end of sealing washer main part (8) extends and has first annular plate portion (9), and the medial extremity of sealing washer main part (8) extends and has second annular plate portion (10), and sealing washer main part (8), first annular plate portion (9) and second annular plate portion (10) three form jointly annular groove (1), and the one end that keeps away from sealing washer main part (8) on second annular plate portion (10) inwards extends and forms sealed inner lip (4).

8. The dual seal ring waterproof sealing structure of claim 1, wherein: the sealing ring is made of polytetrafluoroethylene materials.