CN215830990U

CN215830990U - Dust-proof cover

Info

Publication number: CN215830990U
Application number: CN202122005813.8U
Authority: CN
Inventors: 吕洪斌
Original assignee: Zhejiang Dingfu Rubber Plastic Technology Co ltd
Current assignee: Zhejiang Dingfu Rubber Plastic Technology Co ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-02-15
Anticipated expiration: 2031-08-24

Abstract

The utility model relates to a dust-proof cover, including little oral area, bellows portion, the macrostoma portion that connects gradually, the inner wall of little oral area is equipped with a plurality of sealing rings, the axial lead of sealing ring with the axial lead coincidence of little oral area, a plurality of sealing rings are along little oral area axis direction interval distribution. In practical use, the small opening part is fixed at the shaft lever of the three-ball pin, a plurality of sealing grooves for accommodating the sealing rings are formed in the shaft lever, and the sealing rings of the dustproof sleeves are embedded into the sealing grooves for sealing; in the actual use process of the dustproof sleeve, as long as one sealing ring has no defects such as cracks or depressions, the sealing effect of the dustproof sleeve can be ensured, the butter is reduced from overflowing from the dustproof sleeve, and the oil leakage phenomenon of the dustproof sleeve is improved.

Description

Dust-proof cover

Technical Field

The application relates to the technical field of automobile dust prevention, and more particularly relates to a dustproof sleeve.

Background

The ball cage is also called as constant velocity universal joint, is an important part in a car transmission system, and is used for transmitting the power of an engine from a speed changer to wheels to drive a car to run at high speed. The dustproof sleeve is a key part in the ball cage product and mainly plays a role in preventing dust from entering the ball cage and preventing butter in the ball cage from flowing out. The dustproof sleeve is mainly sleeved on the bell-shaped shell of the ball cage, the large opening part of the dustproof sleeve is fixed on the outer wall of the bell-shaped shell through the clamp, and the small opening part of the dustproof sleeve is fixed at the shaft lever of the three-ball pin through the clamp.

Chinese utility model patent like patent publication No. CN212106926U discloses a TPE dust cover, including the bellows section, the both ends of bellows section are equipped with stiff end one, stiff end two respectively, be equipped with the bellying on the inner wall of stiff end one, the better sealed effect of bellying and mounted position's outer wall counterbalance.

However, the above-mentioned technology has the defect that when the bulge has the defects of cracks, depressions and the like, grease in the ball cage will leak from the defect of the bulge, which causes the oil leakage phenomenon of the dust cover and needs to be improved.

SUMMERY OF THE UTILITY MODEL

In order to improve the oil leak problem of dirt proof boot, this application provides a dirt proof boot.

The application provides a dirt proof boot adopts following technical scheme:

the utility model provides a dust cover, is including the little oral area, bellows portion, the macrostoma portion that connect gradually, the inner wall of little oral area is equipped with a plurality of sealing rings, the axial lead of sealing ring with the axial lead coincidence of little oral area, a plurality of sealing rings are along little oral area axis direction interval distribution.

According to the technical scheme, when the dustproof sleeve is actually used, the small opening part is fixed at the shaft lever of the three-ball pin, the shaft lever is provided with the sealing groove for accommodating the sealing ring, and the sealing ring of the dustproof sleeve is embedded into the sealing groove for sealing; in actual use, as long as there is not crack or defect such as sunken on a sealing ring, just can guarantee the sealed effect of dirt proof boot, reduce the butter and spill over from the dirt proof boot, improve the oil leak phenomenon of dirt proof boot.

Because the probability that the sealing ring has defects in actual production is not high, a plurality of sealing rings are arranged in the same dustproof sleeve, the probability that the sealing rings have defects simultaneously can be further reduced, and the oil leakage phenomenon of the dustproof sleeve is greatly reduced.

Optionally, the number of the sealing rings is three, and the protrusion amount of the sealing ring in the middle is larger than the protrusion amount of the two adjacent sealing rings on the two sides.

Through above-mentioned technical scheme, because the protruding volume that is located the sealing ring in the middle is great, in the actual assembling process, can reduce the axostylus axostyle to the wearing and tearing of two sealing rings of adjacent both sides, reduce two sealing rings of adjacent both sides and because of wearing and tearing the condition that the defect appears, improve the leakproofness of dirt proof boot.

Optionally, the axial section of the sealing ring located in the middle is convex in a circular arc shape.

Through above-mentioned technical scheme, when the sealing ring embedding corresponds the seal groove on the axostylus axostyle, embedding that can be comparatively convenient improves the convenience that the dirt proof boot cover was established.

Optionally, the outer wall of little oral area is equipped with ring groove one, ring groove one is corresponding to three along the ascending position of little oral area axial direction the sealing ring sets up, ring groove one is used for supplying the clamp installation.

Through above-mentioned technical scheme, when little mouth portion cover was located on the axostylus axostyle, installation clamp on ring groove one can make the sealing ring can with the inseparabler of the seal groove laminating on the axostylus axostyle, strengthen the leakproofness of dirt proof boot.

Optionally, the bellows portion includes a plurality of crests and a plurality of troughs that are located between the adjacent crest, the diameter of trough is less than the diameter of two adjacent crests, and is a plurality of the diameter of crest is by the little mouth part to the big oral area direction crescent setting, and is a plurality of the diameter of trough is by the little mouth part to the big oral area direction crescent setting.

Through above-mentioned technical scheme, when the ball cage swings, crest and trough in the bellows portion can extrude each other to reduce the extrusion to small-bore portion, reduce small-bore portion and appear damaged condition because of the extrusion and take place, improve the durability of dirt proof boot.

Optionally, be formed with transition portion between tang portion and the bellows portion, the one end that transition portion is close to the tang portion outwards thickens the setting, the wall thickness of transition portion by tang portion extremely the bellows portion direction thins gradually.

By the technical scheme, the situation that the transition part between the small opening part and the corrugated pipe part is broken can be reduced, so that the oil leakage situation of the dustproof sleeve is improved; simultaneously the wall thickness of transition portion is by the setting of small-bore portion to bellows portion direction attenuation gradually, can make bellows portion's elastic shrinkage softer with the extension, makes holistic structure set up more rationally.

Optionally, the outer wall of the large opening is provided with a second annular clamping groove, and the second annular clamping groove is used for installing the hoop.

Through the technical scheme, the gap can be reduced by more tightly attaching the large opening part and the outer wall of the bell-shaped shell, and the oil leakage condition of the dustproof sleeve is improved.

Optionally, an oil seal ring is arranged on the inner wall of the large opening part.

Through above-mentioned technical scheme, the oil seal ring is set up to the macrostoma inner wall can reduce the oil leak under the dirt proof boot non-operating condition, improves the oil leak condition of dirt proof boot.

Optionally, the small opening part the bellows part reaches the big opening part is integrated into one piece and the material is TPE.

Through above-mentioned technical scheme, TPE is a thermoplastic elastomer material, has high strength, high resilience, weatherability, fatigue resistance and temperature toleration, and the processability is superior, need not the vulcanization, can recycle. The dustproof sleeve is used in the dustproof sleeve, so that the service life of the dustproof sleeve can be prolonged.

In summary, the present application includes at least one of the following beneficial technical effects:

(1) through the plurality of sealing rings arranged in the axial direction of the dustproof sleeve, in actual use, as long as one sealing ring has no defects such as cracks or depressions, the sealing effect of the dustproof sleeve can be ensured, the overflow of butter from the dustproof sleeve is reduced, and the oil leakage phenomenon of the dustproof sleeve is improved;

(2) the transition part is arranged at one end close to the small opening part in an outward thickening mode, so that the situation that the transition part between the small opening part and the corrugated pipe part is broken can be reduced, and the oil leakage situation of the dustproof sleeve is improved;

(3) through using the TPE material, strengthen the life of dirt proof boot.

Drawings

Fig. 1 is an overall schematic diagram of the present embodiment.

Fig. 2 is a sectional view of the entire structure of the present embodiment.

Reference numerals: 1. a small mouth part; 2. a bellows portion; 21. wave crest; 22. a trough of a wave; 3. a large mouth part; 4. a seal ring; 5. An oil seal ring; 6. a first annular clamping groove; 7. a second annular clamping groove; 8. a transition portion.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a dustproof sleeve.

Referring to fig. 1, the present invention includes a small-diameter portion 1, a bellows portion 2, and a large-diameter portion 3 connected in this order. The small opening part 1, the corrugated pipe part 2 and the large opening part 3 are all integrally formed and made of TPE materials. The small opening part 1 and the large opening part 3 are both arranged in a circular ring shape, and the diameter of the large opening part 3 is larger than that of the small opening part 1. Bellows portion 2 includes a plurality of crests 21 and sets up a plurality of troughs 22 between adjacent crest 21, and every trough 22's diameter all is less than its adjacent both sides crest 21's diameter, and a plurality of crests 21 and a plurality of troughs 22's diameter all increases gradually along the direction of small mouth portion 1 to macrostoma 3 and sets up.

Referring to fig. 1 and 2, three sealing rings 4 are fixed on the inner wall of the small opening portion 1, the axis of each sealing ring 4 coincides with the axis of the small opening portion 1, the three sealing rings 4 are uniformly distributed along the axis of the small opening portion 1, and the protrusion amount of the sealing ring 4 in the middle is larger than the protrusion amount of the two sealing rings 4 on two adjacent sides. The sealing ring 4 is made of TPE materials and is integrally formed, the axial section of the sealing ring 4 in the middle is in an arc-shaped bulge, and the axial sections of the two adjacent sealing rings 4 on two sides are in a sharp-horn-shaped bulge.

In actual use, the small opening part 1 is fixed at the shaft rod of the three-ball pin, the sealing groove for accommodating the sealing ring 4 is formed in the shaft rod, and the sealing ring 4 is embedded into the sealing groove formed in the shaft rod. However, the sealing ring 4 may have defects such as cracks and depressions, and the grease in the ball cage may flow into the defects of the sealing ring 4 and then flow out of the dust-proof sleeve along the cracks, so that the dust-proof sleeve leaks oil; but the grease needs to flow out of the dust cover along the axial direction of the shaft rod. Through setting up three sealing ring 4, as long as there is not the defect in at least one sealing ring 4 in three sealing ring 4, just can guarantee the sealed effect of dirt proof boot, reduce the butter along the possibility that the axle rod axis direction flows out from the defect, improve the oil leak phenomenon of dirt proof boot.

In the actual assembly process, because the protruding amount of the sealing ring 4 in the middle is large, the abrasion of the shaft lever to the two sealing rings 4 on the two adjacent sides can be reduced, the defect condition of the two sealing rings 4 on the two adjacent sides due to abrasion is reduced, and the sealing performance of the dustproof sleeve is improved.

Referring to fig. 1 and 2, an oil seal ring 5 is fixed on the inner wall of the large opening portion 3, the axial lead of the oil seal ring 5 is overlapped with the axial lead of the large opening portion 3, and the oil seal ring 5 is made of TPE and is integrally molded. In practical use, the large opening part 3 is fixed on the outer wall of the bell-shaped shell, the outer wall of the bell-shaped shell is provided with an oil sealing groove for accommodating the oil sealing ring 5, and the oil sealing ring 5 is embedded into the oil sealing groove. The oil seal ring 5 can reduce the gap between the large opening part 3 and the outer side wall of the bell-shaped shell, and improve the oil leakage condition of the dustproof sleeve.

Referring to fig. 1 and 2, an annular clamping groove one 6 is formed in the outer wall of the small opening portion 1, the axial line of the annular clamping groove one 6 coincides with the axial line of the small opening portion 1, and the annular clamping groove one 6 is arranged along the axial direction of the small opening portion corresponding to the three sealing rings 4. A ring groove 6 is used for installing the hoop, so that the sealing grooves on the sealing ring 4 and the shaft rod are attached more tightly, and the sealing performance of the dustproof sleeve is enhanced. The outer wall of the large opening part 3 is provided with a second annular clamping groove 7, and the axial lead of the second annular clamping groove 7 is superposed with the axial lead of the large opening part 3. The second annular clamping groove 7 is used for installing the hoop, so that the large opening portion 3 is attached to the outer wall of the bell-shaped shell more tightly, and the oil leakage condition of the dustproof sleeve is improved.

Referring to fig. 1 and 2, a transition portion 8 is formed between the small opening portion 1 and the bellows portion 2, and one end of the transition portion 8, which is close to the small opening portion 1, is thickened outwards, so that the occurrence of fracture of the transition portion 8 between the small opening portion 1 and the bellows portion 2 is reduced, and the oil leakage prevention capability of the dust boot is enhanced. The wall thickness of the transition portion 8 becomes gradually thinner from the small mouth portion 1 to the bellows portion 2.

The working principle of the embodiment is as follows: in practical use, the small opening part 1 is fixed at the shaft rod of the three-ball pin through a clamp, the large opening part 3 is fixed on the outer wall of the bell-shaped shell through the clamp, the sealing ring 4 is embedded in a sealing groove arranged at the shaft rod, and the oil sealing ring 5 is embedded in an oil sealing groove arranged on the outer wall of the bell-shaped shell.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a dust cover, is including little oral area (1), bellows portion (2), big oral area (3) that connect gradually, its characterized in that: the inner wall of xiao kou (1) is equipped with a plurality of sealing rings (4), the axial lead of sealing ring (4) with the axial lead coincidence of xiao kou (1), a plurality of sealing rings (4) are along xiao kou (1) axis direction interval distribution, sealing ring (4) are equipped with threely, and the protruding volume that is located sealing ring (4) in the middle is greater than the protruding volume of sealing ring (4) of adjacent both sides.

2. The dust boot of claim 1, wherein: the axial section of the sealing ring (4) positioned in the middle is convex in a circular arc shape.

3. The dust boot of claim 1, wherein: the outer wall of small-bore portion (1) is equipped with ring groove (6), ring groove (6) are corresponding to three along the ascending position of small-bore portion axial direction sealing ring (4) set up, ring groove (6) are used for supplying the clamp installation.

4. The dust boot of claim 1, wherein: bellows portion (2) include a plurality of crests (21) and a plurality of trough (22) that are located between adjacent crest (21), the diameter of trough (22) is less than the diameter of two adjacent crests (21), and is a plurality of the diameter of crest (21) is by little oral area portion (1) to big oral area portion (3) orientation crescent setting, and is a plurality of the diameter of trough (22) is by little oral area portion (1) to big oral area portion (3) orientation crescent setting.

5. The dust boot of claim 1, wherein: be formed with transition portion (8) between tang portion (1) and bellows portion (2), the outside thickening setting of one end that transition portion (8) are close to tang portion (1), the wall thickness of transition portion (8) by tang portion (1) extremely bellows portion (2) direction thins gradually.

6. The dust boot of claim 1, wherein: the outer wall of the large opening portion (3) is provided with a second annular clamping groove (7), and the second annular clamping groove (7) is used for installing a clamp.

7. The dust boot of claim 1, wherein: an oil seal ring (5) is arranged on the inner wall of the large opening part (3).

8. The dust boot of claim 1, wherein: the small opening part (1), bellows part (2) and big opening part (3) are integrated into one piece and the material is TPE.