CN217730657U

CN217730657U - Waterproof structure of card base

Info

Publication number: CN217730657U
Application number: CN202221157650.3U
Authority: CN
Inventors: 林鲁锋
Original assignee: Bafang Electric Suzhou Co Ltd
Current assignee: Bafang Electric Suzhou Co Ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2022-11-04
Anticipated expiration: 2032-05-13

Abstract

The utility model discloses a card base waterproof construction, it relates to bicycle or electric power assisted bicycle field. The technical scheme is characterized by comprising a center shaft, a clamp base inner ring and a clamp base outer ring, wherein a first rolling bearing is arranged between the center shaft and the clamp base inner ring, a second rolling bearing is arranged between the center shaft and the clamp base outer ring, a locking nut in contact with the second rolling bearing is arranged on the center shaft, a ratchet and pawl component is arranged between the clamp base inner ring and the clamp base outer ring, and an end cover is fixedly arranged on the outer end face of the clamp base inner ring; a first sealing element is arranged between the outer side wall of the inner end of the outer clamp base in the axial direction and the end cover, a second sealing element is arranged between the inner side wall of the inner end of the outer clamp base in the axial direction and the inner clamp base, and a third sealing element is arranged between the inner side wall of the outer clamp base in the axial direction and the lock nut. The utility model discloses can improve water-proof effects to increase of service life.

Description

Waterproof structure of card base

Technical Field

The utility model relates to a bicycle or electric power assisted bicycle field, more specifically say, it relates to a waterproof structure of card base.

Background

The card base of current bicycle or electric bicycle all has the risk of intaking generally, influences the life of card base.

For example, the existing chinese patent with publication No. CN202364046U discloses a card type motor, which includes a motor body and a card type body, wherein the motor body includes a motor end cover, the card type body includes a card flying core, a multi-stage flying card type jacket, a jack, a spring wire and a bearing, and a dust ring close to the motor end cover is disposed in an annular gap between the card flying core and the multi-stage flying card type jacket.

In the patent, only a dustproof ring is arranged between the flying core and the multi-stage flying card type outer sleeve, so that the waterproof performance is insufficient.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a card base waterproof construction, it has the advantage that improves water-proof effects.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a waterproof structure of a clamping base comprises a middle shaft, a clamping base inner ring and a clamping base outer ring, wherein a first rolling bearing is arranged between the middle shaft and the clamping base inner ring, a second rolling bearing is arranged between the middle shaft and the clamping base outer ring, a locking nut in contact with the second rolling bearing is arranged on the middle shaft, a ratchet and pawl assembly is arranged between the clamping base inner ring and the clamping base outer ring, and an end cover is fixedly arranged on the outer end face of the clamping base inner ring;

a first sealing element is arranged between the outer side wall of the axial inner end of the clamp base outer ring and the end cover, a second sealing element is arranged between the inner side wall of the axial inner end of the clamp base outer ring and the clamp base inner ring, and a third sealing element is arranged between the inner side wall of the axial outer end of the clamp base outer ring and the locking nut.

Further, a fourth sealing element is arranged between the inner side wall of the axial inner end of the locking nut and the middle shaft.

Furthermore, the fourth sealing element is an O-shaped ring, and a sealing groove matched with the O-shaped ring is formed in the middle shaft.

Further, first sealing member is the oil blanket, the oil blanket install in the end cover inside wall.

Further, the second sealing element is a framework type rubber oil seal, and the framework type rubber oil seal is installed on the outer side wall of the inner ring of the card base.

Further, the framework type rubber oil seal comprises two sealing lips which are in contact with the inner side wall of the outer ring of the card base.

Furthermore, waterproof grease is arranged between the two sealing lips.

Further, the third sealing element is a framework type rubber sealing ring, and the framework type rubber sealing ring is installed on the inner side wall of the outer ring of the card base.

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

be provided with first sealing member between the outer wall of the axial inner of card base outer lane and the end cover, be provided with the second sealing member between the inner wall of the axial inner of card base outer lane and the card base inner circle, be provided with the third sealing member between the inner wall of the axial outer end of card base outer lane and the lock nut, be provided with the fourth sealing member between the inner wall of lock nut's axial inner and the axis, a plurality of sealing member cooperations form four waterproof construction to the card base, thereby can effectively improve water-proof effects, increase of service life.

Drawings

FIG. 1 is a schematic view of an overall structure of a waterproof card-based structure according to an embodiment;

FIG. 2 is a cross-sectional view of a waterproof card-based structure according to an embodiment.

In the figure: 1. a middle shaft; 2. a clamping base inner ring; 3. an end cap; 31. fixing the bolt; 4. a clamping base outer ring; 5. a ratchet and pawl assembly; 6. locking the nut; 71. a first rolling bearing; 72. a second rolling bearing; 81. oil sealing; 82. framework type rubber oil seal; 83. a framework type rubber sealing ring; 84. an O-ring.

Detailed Description

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

The specific embodiments are only for explaining the present invention, and it is not a limitation to the present invention, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the claims of the present invention.

Example (b):

a card base waterproof structure, refer to fig. 1 and fig. 2, it includes the centre shaft 1, the inner ring 2 of the card base and the outer ring 4 of the card base, there is the first antifriction bearing 71 between centre shaft 1 and the inner ring 2 of the card base, there is the second antifriction bearing 72 between centre shaft 1 and the outer ring 4 of the card base, there is lock nut 6 contacting with second antifriction bearing 72 on the centre shaft 1, there is ratchet pawl assembly 5 between inner ring 2 of the card base and the outer ring 4 of the card base, the outer end face of the inner ring 2 of the card base is fixedly provided with the end cap 3; specifically, in the present embodiment, the end cap 3 is provided with a fixing bolt 31 penetrating therethrough and connected to the inner ring 2 of the card base; in the embodiment, a first sealing element is arranged between the outer side wall of the axial inner end of the card base outer ring 4 and the end cover 3, a second sealing element is arranged between the inner side wall of the axial inner end of the card base outer ring 4 and the card base inner ring 2, and a third sealing element is arranged between the inner side wall of the axial outer end of the card base outer ring 4 and the lock nut 6; first sealing member, second sealing member and the cooperation of third sealing member form three waterproofly to the cardboard base to effectively improve water-proof effects.

Referring to fig. 2, preferably, a fourth sealing member is disposed between the inner sidewall of the axial inner end of the lock nut 6 and the middle shaft 1, so that the waterproof effect can be further improved; specifically, in this embodiment, the fourth sealing element is an O-ring 84, and a sealing groove matched with the O-ring 84 is formed on the middle shaft 1; in this embodiment, the inner side wall of the axially inner end of the lock nut 6 presses the O-ring 84 to improve the sealing between the second rolling bearing 72 and the lock nut 6, thereby improving the waterproof effect.

Referring to fig. 2, specifically, in the present embodiment, the first sealing element is an oil seal 81, the oil seal 81 is installed on the inner side wall of the end cover 3, and a sealing lip of the oil seal 81 is in contact with the outer side wall of the card base outer ring 4; the second sealing element is a framework type rubber oil seal 82, the framework type rubber oil seal 82 is arranged on the outer side wall of the inner ring 2 of the clamping base, and a sealing lip of the framework type rubber oil seal 82 is in contact with the outer side wall of the outer ring 4 of the clamping base; preferably, the framework rubber oil seal 82 comprises two sealing lips which are in contact with the inner side wall of the outer ring 4 of the card base, and waterproof grease is arranged between the two sealing lips, so that the waterproof effect can be further improved; the third sealing element is a framework type rubber sealing ring 83, the framework type rubber sealing ring 83 is arranged on the inner side wall of the outer ring 4 of the clamping base, and a sealing lip of the framework type rubber sealing ring 83 is in contact with the outer side wall of the locking nut 6; of course, in other alternative embodiments, the first seal, the second seal, the third seal and the fourth seal may be selected from other seals according to the requirement, and are not limited herein.

Claims

1. A waterproof structure of a clamp base comprises a center shaft, a clamp base inner ring and a clamp base outer ring, wherein a first rolling bearing is arranged between the center shaft and the clamp base inner ring, a second rolling bearing is arranged between the center shaft and the clamp base outer ring, a locking nut in contact with the second rolling bearing is arranged on the center shaft, a ratchet and pawl component is arranged between the clamp base inner ring and the clamp base outer ring, and an end cover is fixedly arranged on the outer end face of the clamp base inner ring;

the method is characterized in that:

2. The card-based waterproofing structure according to claim 1, wherein: and a fourth sealing element is arranged between the inner side wall of the axial inner end of the locking nut and the middle shaft.

3. The card-based waterproofing structure according to claim 2, wherein: the fourth sealing element is an O-shaped ring, and a sealing groove matched with the O-shaped ring is formed in the middle shaft.

4. The card-based waterproofing structure according to claim 1, wherein: the first sealing element is an oil seal, and the oil seal is installed on the inner side wall of the end cover.

5. The card-based waterproofing structure according to claim 1, wherein: the second sealing element is a framework type rubber oil seal, and the framework type rubber oil seal is arranged on the outer side wall of the inner ring of the clamping base.

6. The card-based waterproofing structure according to claim 5, wherein: the framework type rubber oil seal comprises two sealing lips which are in contact with the inner side wall of the outer ring of the clamp base.

7. The card-based waterproofing structure according to claim 6, wherein: and waterproof grease is arranged between the two sealing lips.

8. The card-based waterproofing structure according to claim 1, wherein: the third sealing element is a framework type rubber sealing ring, and the framework type rubber sealing ring is arranged on the inner side wall of the outer ring of the card base.