CN211116301U

CN211116301U - Sealed dustproof construction of crankcase

Info

Publication number: CN211116301U
Application number: CN201922413872.1U
Authority: CN
Inventors: 马洪杰
Original assignee: Changzhou Haojue Suzuki Motorcycle Co ltd
Current assignee: Changzhou Haojue Suzuki Motorcycle Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-07-28
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to a sealed dustproof construction of crankcase, be in with the setting including installing the bearing between the drive shaft of crankcase and crankcase the oil blanket in the bearing outside, and shelter from the baffle in the oil blanket outside, the oil blanket sets up between the outer wall of crankcase and the drive shaft, the baffle includes the ring body to and set up at a pair of engaging lug of ring body outlying, the inner circle of ring body is provided with the annular turn-ups. The utility model discloses inside can preventing the dust to get into the guard plate, realize the isolation of oil blanket and dust, improve the life of oil blanket, guarantee the sealed effect of crankcase.

Description

Sealed dustproof construction of crankcase

Technical Field

The utility model belongs to the technical field of the crankcase is dustproof, concretely relates to sealed dustproof construction of crankcase.

Background

The oil seal of the driving shaft of the motorcycle transmitter is an important part for sealing the crankcase, the oil seal of the driving shaft of the motorcycle is directly contacted with external dust, sand and other splashed foreign matters in the riding process, and the oil seal of the driving shaft of the motorcycle is usually protected by a dust lip of the oil seal, but is influenced by the vibration of the driving shaft when the driving shaft rotates at a high speed, so that the dust, sand and the like are easily drawn into the oil seal, the abnormal abrasion of the oil seal is caused, and then the sealing of the crankcase is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sealed dustproof construction of crankcase to solve the easy wearing and tearing of oil blanket and cause the problem of sealed inefficacy.

The utility model discloses a sealed dustproof construction of crankcase realizes like this:

the utility model provides a sealed dustproof construction of crankcase, is in including installing bearing and the setting between the drive shaft of crankcase and crankcase the oil blanket in the bearing outside, and shelter from the baffle in the oil blanket outside, the oil blanket sets up between the outer wall of crankcase and the drive shaft, the baffle includes the ring body to and set up at a pair of engaging lug of ring body outlying, the inner circle of ring body is provided with annular turn-ups.

Furthermore, the flanging and the driving shaft are coaxially arranged.

Furthermore, the axial length of the flanging is 3-7mm。

Further, the outer diameter of the ring body is larger than that of the oil seal.

Furthermore, a connecting hole is formed in the connecting lug, and the connecting lug is connected with the crankcase through a bolt penetrating through the connecting hole.

Further, the end of the drive shaft extends out of the crankcase and is mounted with a sprocket via a bushing.

Furthermore, the ring body is sleeved on the bushing, and the flanging is arranged towards the direction of the chain wheel.

Further, the oil seal is disposed between the bushing and the crankcase.

Further, the oil blanket includes the main part and sets up the skeleton in the main part, the inner circle outside of main part is provided with the dust lip, and the inboard is provided with the spring lip, install fastening spring in the spring lip, form the waist between spring lip and the dust lip.

Further, the outer surface of the waist part is a plane sealing lip opposite to the fastening spring.

After the technical scheme is adopted, the utility model discloses the beneficial effect who has does:

the utility model discloses an inner circle has the setting of turn-ups baffle, can prevent that the dust from getting into inside the guard plate, realizes the isolation of oil blanket and dust, improves the life of oil blanket, guarantees the sealed effect of crankcase.

Drawings

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

Fig. 1 is a partial sectional view of a sealed dustproof structure of a crankcase according to a preferred embodiment of the present invention;

FIG. 2 is a block diagram of a baffle plate of a sealed dust-proof structure of a crankcase according to a preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a sectional view of an oil seal of a sealed dust-proof structure of a crankcase according to a preferred embodiment of the present invention;

in the figure: the structure comprises a crankcase 1, a driving shaft 2, a bearing 3, an oil seal 4, a main body 41, a framework 42, a dust lip 43, a spring protection lip 44, a fastening spring 45, a waist portion 46, a plane sealing lip 47, an inner chamfer 48, an outer chamfer 49, a baffle 5, a ring body 51, a connecting lug 52, a flange 53, a connecting hole 54, a bolt 55, a bushing 6, a chain wheel 7 and a sealing ring 8.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-4, a sealed dustproof structure of a crankcase comprises a bearing 3 installed between the crankcase 1 and a driving shaft 2 of the crankcase 1, an oil seal 4 arranged outside the bearing 3, and a baffle 5 sheltered outside the oil seal 4, wherein the oil seal 4 is arranged between the outer wall of the crankcase 1 and the driving shaft 2, the baffle 5 comprises a ring body 51, and a pair of connecting lugs 52 arranged on the periphery of the ring body 51, and an annular flange 53 is arranged on the inner ring of the ring body 51.

The bearing 3 is arranged to support the crankcase 1, i.e. the crankcase 1 is stationary when the drive shaft 2 rotates at high speed, in particular the drive shaft 2 is connected to the inner ring of the bearing 3, while the outer ring of the bearing 3 is connected to the crankcase 1.

In order to prevent foreign matters such as dust from entering the oil seal 4 due to vibration when the drive shaft 2 rotates at a high speed, the flange 53 is disposed coaxially with the drive shaft 2.

The flanging 53 sleeved outside the driving shaft 2 can directly block foreign matters such as dust in the flanging 53 by utilizing the rotating airflow and centrifugal action of the rotation of the driving shaft 2, and the foreign matters are prevented from entering the inside of the baffle 5 and the inside of the oil seal 4.

In order to further improve the dustproof effect, the axial length of the turned-over edge 53 is 3-7 mm.

Preferably, the axial length of the cuff 53 is 5 mm.

In order to shield the oil seal 4 completely and realize the full coverage of the oil seal 4, thereby ensuring the dustproof effect, the outer diameter of the ring body 51 is larger than that of the oil seal 4.

To achieve the mounting between the baffle 5 and the crankcase 1, the attachment lugs 52 are connected to the crankcase 1 by bolts 55 passing through the attachment holes 54.

To facilitate connection to a drive chain and to effect power transmission, the end of the drive shaft 2 extends out of the crankcase 1 and is fitted with a sprocket 7 via a bushing 6.

The arrangement of the bush 6 can reduce the abrasion degree between the chain wheel 7 and the driving shaft 2 and prolong the service life of the chain wheel 7 and the driving shaft 2.

Preferably, a sealing ring 8 is provided between the drive shaft 2 and the bush 6 in order to increase the sealing between the bush 6 and the drive shaft 2.

For the convenience of installation, the baffle 5 is directly attached to the outer side of the oil seal 4, the dustproof effect is increased, the ring body 51 is sleeved on the bushing 6, and the flanging 53 is arranged towards the direction of the chain wheel 7.

Preferably, the single-side gap between the inner wall of the turned-over edge 53 and the bushing 6 is 0.5mm, and the small-gap fit is adopted between the two, so that dust can be further prevented from entering the inside of the baffle 5 and the inside of the oil seal 4.

In order to increase the sealing effect of the oil seal 4, the oil seal 4 is provided between the bush 6 and the crankcase 1.

Referring to fig. 4, in order to realize the sealing performance of the oil seal 4, the oil seal 4 includes a main body 41 and a framework 42 disposed in the main body 41, a dust lip 43 is disposed on the outer side of the inner ring of the main body 41, a spring guard 44 is disposed on the inner side of the inner ring, a fastening spring 45 is mounted in the spring guard 44, and a waist portion 46 is formed between the spring guard 44 and the dust lip 43.

The frame 42 serves to support the entire body 41, and the fastening spring 45 applies pressure to the waist portion 46 by elastic force, thereby increasing sealability between the outer wall of the waist portion 46 and the crankcase 2.

The sealing lip of the conventional oil seal 4 for sealing at the waist portion is a single sealing lip or two juxtaposed sealing lips, which are in line-surface contact with the crankcase 3, and the sealing effect is poor, while in this embodiment, the outer surface of the waist portion is a flat sealing lip 47 opposite to the fastening spring 45.

The present embodiment adopts the structure of the plane sealing lip 47, which can make the plane surface contact with the crankcase 1, thereby increasing the sealing effect of the oil seal 4.

Preferably, the outer race of the main body 41 is provided with an inner chamfer 48 and an outer chamfer 49 to facilitate the installation of the oil seal 4.

Preferably, the main body 41 is made of oil-resistant rubber, and has good compression deformation, abrasion resistance and elongation force.

The framework 42 is made of metal and has high supporting strength.

The utility model discloses a setting of baffle 5 can carry out the total coverage protection to oil blanket 4, adopts little clearance fit between its and the bush 6 of drive shaft, utilizes drive shaft 2 to rotate the rotation air current that the in-process produced at a high speed and centrifugal action prevents that the dust gets into baffle 5 inside, realizes the isolation of oil blanket 4 and dust, reduces the probability of 4 wearing and tearing of oil blanket, improves the life of oil blanket, guarantees the sealed effect of crankcase 2.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a sealed dustproof construction of crankcase, its characterized in that is in including bearing (3) and the setting of installing between drive shaft (2) of crankcase (1) and crankcase (1) oil blanket (4) in bearing (3) outside, and shelter from baffle (5) in oil blanket (4) outside, oil blanket (4) set up between the outer wall of crankcase (1) and drive shaft (2), baffle (5) include ring body (51) to and set up at a pair of engaging lug (52) of ring body (51) outlying, the inner circle of ring body (51) is provided with annular turn-ups (53).

2. The sealed dustproof structure of the crankcase according to claim 1, wherein the burring (53) is provided coaxially with the drive shaft (2).

3. The sealed dustproof structure of the crankcase according to claim 1, wherein the axial length of the burring (53) is 3 to 7 mm.

4. The sealed dust-proof structure of the crankcase according to claim 1, wherein an outer diameter of the ring body (51) is larger than an outer diameter of the oil seal (4).

5. The sealed dust-proof structure of the crankcase according to claim 1, wherein the connection lug (52) is provided with a connection hole (54), and the connection lug (52) is connected to the crankcase (1) by a bolt (55) passing through the connection hole (54).

6. The sealed dust-proof structure of the crankcase according to claim 1, wherein the end of the drive shaft (2) is protruded out of the crankcase (1) and is mounted with a sprocket (7) through a bushing (6).

7. The sealed dust-proof structure of the crankcase according to claim 6, wherein the ring body (51) is sleeved on the bushing (6), and the turned-over edge (53) is arranged towards the direction of the chain wheel (7).

8. The sealed dustproof structure of the crankcase according to claim 6, wherein the oil seal (4) is provided between the bushing (6) and the crankcase (1).

9. The sealed dustproof structure of the crankcase according to claim 1, wherein the oil seal (4) comprises a main body (41) and a skeleton (42) arranged in the main body (41), a dustproof lip (43) is arranged on the outer side of the inner ring of the main body (41), a spring protection lip (44) is arranged on the inner side of the inner ring of the main body, a fastening spring (45) is installed in the spring protection lip (44), and a waist portion (46) is formed between the spring protection lip (44) and the dustproof lip (43).

10. The sealed dust-proof structure of the crankcase according to claim 9, wherein the outer surface of the waist portion (46) is a flat seal lip (47) opposite to the fastening spring (45).