CN215059010U

CN215059010U - Integral dust cover

Info

Publication number: CN215059010U
Application number: CN202121344620.9U
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: 2021-06-16
Filing date: 2021-06-16
Publication date: 2021-12-07
Anticipated expiration: 2031-06-16

Abstract

The application discloses integral type dust cover relates to dirt proof boot technical field, and it is used for connecting in the bell shell that periphery wall circumference evenly distributed has three recess, including the little oral area, bellows portion and the big oral area that connect gradually, the integrative fixed go-between of big oral area inner wall, go-between inner wall are fixed with three bellying, and three bellying is circumference evenly distributed around the axis of go-between, and the bellying is used for imbedding the recess that corresponds and realizes sealing. Through fixing the connecting ring and the large opening integrally, the trouble of mounting the connecting ring and the large opening with the bell-shaped shell is reduced, and therefore the actual installation and use of the dustproof sleeve are more convenient. In addition, the connecting ring and the large opening are integrally fixed, so that the installation and matching of the large opening and the outer shell are more stable.

Description

Integral dust cover

Technical Field

The application relates to the technical field of dust covers, and more specifically relates to an integral type dust cover.

Background

The automobile ball cage, namely the constant velocity universal joint, is connected to a transmission shaft of a vehicle and has the function of transmitting the power of an engine from a transmission to a driving wheel to drive a car to run at high speed. Tripod constant velocity joints are formed using three bearings with needle rollers to form a tripod, which bearings can slide in three tracks in a bell housing, the outer side wall of the bell housing of the tripod usually being provided with grooves. When the tripod type constant velocity universal joint is used, the tripod can slide inwards and outwards, so that the length change of the driving shaft generated when the vehicle moves is accommodated.

The dust cover is mainly covered on one side of the opening of the bell-shaped shell, so that the tripod, the bearing of the bell-shaped shell and the track are isolated from the outside, and two ends of the dust cover are respectively fixed on the outer side of the bell-shaped shell and the shaft of the tripod through the hoops, thereby preventing external sand and stone impurities from entering the bell-shaped shell to influence the use of the constant velocity universal joint.

Chinese utility model patent like patent publication No. CN212106695U, this patent disclose an anti-cracking dust cover relates to dust cover technical field, and it is including the little oral area, bellows portion and the macrostoma portion that connect gradually, and the wall thickness d of little oral area is 2.3-2.4mm, and the inside wall of little oral area still coaxially is provided with annular bulge loop.

In the related art, the large mouth portion needs to be fixed to the outer shell in actual use. However, as the peripheral wall of the outer shell of the bell-shaped shell is uniformly provided with three grooves along the circumferential direction, in order to strengthen the sealing, a connecting ring needs to be additionally embedded in the large opening part, and the outer side of the bell-shaped shell is sleeved by the connecting ring to realize the assembly. Therefore, when the dustproof sleeve is actually installed, the connecting ring needs to be correspondingly clamped into the large opening part and then assembled with the bell-shaped shell, and the whole dustproof sleeve is troublesome to use.

SUMMERY OF THE UTILITY MODEL

Comparatively troublesome problem when installing the use in order to improve the dirt proof boot actual, this application provides an integral type dust cover.

The application provides an integral type dust cover adopts following technical scheme:

the utility model provides an integral type dust cover for connect in the bell-shaped shell that periphery wall circumference evenly distributed has three recess, including little oral area, bellows portion and the big oral area that connects gradually, the integrative fixed go-between of big oral area inner wall, the go-between inner wall is fixed with three bellying, and is three the bellying winds the axis of go-between is circumference evenly distributed, the bellying is used for imbedding the recess that corresponds and realizes sealing.

Through the technical scheme, the connecting ring and the large opening are integrally fixed, so that the trouble of mounting the connecting ring and the large opening with the bell-shaped shell is reduced during actual mounting, and the actual mounting and use of the dustproof sleeve are more convenient. In addition, the connecting ring and the large opening are integrally fixed, so that the possibility of leakage is reduced, and the installation and matching of the large opening and the outer shell are more stable.

Optionally, it is three the bellying is the interval setting, every the bellying all is the circular arc and convexly appears, the bellying is the circular arc transition around the both ends of big oral area axis circumference and the inner wall of go-between.

Through above-mentioned technical scheme, bellying and go-between inner wall circular arc transition have reduced the condition of stress concentration in the in-service use for holistic use is more durable.

Optionally, the inner wall of the connecting ring is provided with two first protruding rings, and the two first protruding rings are distributed at intervals along the axial extension direction of the large opening.

Through above-mentioned technical scheme, set up two bulge loops one, the outer wall of bell shell can be pressed close to two bulge loops one, and then strengthens sealed effect. In addition, the annular groove can be seted up at the outer wall of bell shell in actual process, can correspond the embedding annular groove through bulge loop one, strengthens the location on the one hand, also can strengthen the sealed effect between bell shell and the dirt proof boot for holistic use is more stable.

Optionally, the first convex ring has a cross section which is gradually reduced along the axial width of the connecting ring towards the direction away from the inner wall of the connecting ring.

Through the technical scheme, the gradual change of the first convex ring is arranged, so that the deformation of the first convex ring is more convenient, and the first convex ring is better sealed with the bell-shaped shell in a matching way.

Optionally, a tightly-abutting portion is further fixed between two adjacent protruding portions, the tightly-abutting portion is fixed on the inner wall of the connecting ring, two ends of the tightly-abutting portion around the axial direction of the large opening portion are fixed with the corresponding protruding portions, and the tightly-abutting portion is located between the two first protruding rings.

Through above-mentioned technical scheme, set up and support tight portion, when the in-service use between the adjacent bellying, because the structure of this department is relatively weak, there is the cracked condition of this department easily, strengthens the structural strength between the adjacent bellying through supporting tight portion to make the life of dirt proof boot more lasting.

Optionally, the cross section of the abutting portion gradually decreases along the axial width of the connecting ring in the direction away from the inner wall of the connecting ring.

Through above-mentioned technical scheme, support tight portion and bell housing outer wall and offset, the convenient deformation of one side of convergent setting, in addition, when supporting tight portion and the trench cooperation of bell housing outer wall, the convenient trench of inserting of supporting tight portion card of convergent setting for holistic installation location is more convenient.

Optionally, an arc groove is formed in the outer side wall of the large opening portion, the arc groove is located at one end, close to the corrugated pipe portion, of the large opening portion, and the arc grooves are three and are arranged in one-to-one correspondence with the three protruding portions.

Through the technical scheme, the weight is reduced, the cost is saved, meanwhile, the phenomenon that the product is deformed due to uneven shrinkage caused by over-thickness of local materials can be reduced, the precision of the product is easier to control, and the production of the product is more stable.

Optionally, the outer side wall of the large opening is provided with three notch grooves, and the three notch grooves and the three protrusions are arranged in a one-to-one correspondence manner; reinforcing ribs are arranged in the notch grooves.

Through above-mentioned technical scheme, set up breach groove and strengthening rib, weight reduction saves the cost, also can reduce local material simultaneously and lead to the fact the shrink inequality to arouse the product to warp for the production of product is more stable, and the strengthening rib can be so that the structure of breach groove department satisfies the in-service use demand in addition.

Optionally, still be equipped with in the breach groove and assist the strip, it connects in corresponding to assist the strip the breach groove is around the inner wall at macrostoma portion axis both ends.

Through above-mentioned technical scheme, set up and assist the strip for the circumference atress of big oral area is more even, makes the installation stability of big oral area better.

Optionally, a first ring groove is coaxially formed in the outer peripheral wall of the large opening part; a second annular groove is coaxially formed in the outer peripheral wall of the small opening part; and a second convex ring is coaxially fixed on the inner wall of the small opening part.

Through the technical scheme, the annular groove I and the annular groove II are arranged, and when the dustproof sleeve is installed, the dustproof sleeve is clamped into the annular groove I and the annular groove II through the clamping hoop, so that the integral installation stability is better; and a second convex ring is arranged and is abutted against the shaft, so that the sealing effect between the small opening part and the shaft is enhanced.

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

(1) through fixing the connecting ring and the large opening integrally, the trouble of mounting the connecting ring and the large opening with the bell-shaped shell is reduced, and therefore the actual installation and use of the dustproof sleeve are more convenient. In addition, the connecting ring and the large opening part are integrally fixed, so that the installation and matching of the large opening part and the bell-shaped shell are more stable;

(2) the matching of the dustproof sleeve after installation is more stable by arranging the first convex ring and the abutting part;

(3) through setting up circular arc groove and breach groove, reduce local material and excessively thick and cause the shrink inequality and arouse the product deformation for the precision of product is changeed control, makes the production of product more stable.

Drawings

FIG. 1 is an overall schematic view of an embodiment;

FIG. 2 is a schematic cross-sectional view of an embodiment;

FIG. 3 is another schematic view of the embodiment;

FIG. 4 is a schematic diagram of another embodiment of the present invention.

Reference numerals: 1. a small mouth part; 11. a second ring groove; 12. a convex ring II; 2. a bellows portion; 3. a large mouth part; 31. a first ring groove; 4. a connecting ring; 5. a boss portion; 6. a first convex ring; 7. a tightening part; 8. an arc groove; 9. a notch groove; 10. reinforcing ribs; 13. and (5) auxiliary bars.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses integral type dust cover.

An integral dust cover, see fig. 1, comprises a small mouth part 1, a bellows part 2 and a large mouth part 3 connected in sequence. The small opening part 1, the bellows part 2 and the large opening part 3 are integrally formed and made of TPE. The small opening part 1 and the large opening part 3 are both circular rings, 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 and a plurality of troughs, and the crest all is equipped with a trough along the axis direction interval distribution of xiao kou 1 between the adjacent crest, and the diameter of trough is less than the diameter of adjacent both sides crest, and the diameter of a plurality of crests is grow gradually from the direction of xiao kou 1 to big oral area 3, and the diameter of a plurality of troughs is grow gradually from the direction of xiao kou 1 to big oral area 3.

Referring to fig. 2, the outer peripheral wall of the small opening portion 1 is provided with a second annular groove 11, a second protruding ring 12 is fixed on the inner wall of the small opening portion 1, the cross section of the second protruding ring 12 is smaller than a semicircle, and the arc surface of the second protruding ring 12 is far away from the inner wall of the small opening portion 1. The axes of the convex ring II 12 and the annular groove II 11 are coincided with the axis of the small opening part 1.

Referring to fig. 3, the outer peripheral wall of the large mouth portion 3 is provided with a first annular groove 31, the inner wall of the large mouth portion 3 is integrally fixed with a connecting ring 4, and the connecting ring 4 and the first annular groove 31 are overlapped with the axis of the large mouth portion 3. The inner wall of the connecting ring 4 is fixed with three convex parts 5, and each convex part 5 is in a circular arc convex shape. Three bellying 5 are the interval setting, and three bellying 5 is circumference evenly distributed around the axis of go-between 4, and bellying 5 is the circular arc transition around 3 axis circumference's of big oral area both ends and the inner wall of go-between 4. The connection ring 4 and the end of the boss 5 near the small mouth portion 1 extend to the bellows portion 2 and are fixed to the bellows portion 2. Wherein the inner wall of the connecting ring 4 and the bellows part 2 form a circular arc transition.

During the in-service use, bellying 5 one-to-one imbeds the concatenation in the recess of bell shell periphery wall realization to make the sealed effect of being connected of big oral area 3 and bell shell better. In addition, after the large mouth portion 3 is sleeved on the outer bell shell, the outer bell shell can be abutted to the corrugated pipe portion 2, so that the contact surface between the outer bell shell and the large mouth portion 3 is larger, and the whole mounting structure is more stable.

Referring to fig. 2 and 3, two collars one 6 are fixed to the inner wall of the connection ring 4, each collar 6 extends around the axis of the connection ring 4, and the cross section of each collar 6 is gradually reduced in a direction away from the inner wall of the connection ring 4 along the axial width of the connection ring 4. The two convex rings I6 are distributed at intervals along the axial extension direction of the large mouth part 3. And a tight-supporting part 7 is fixed between every two adjacent convex parts 5, and each tight-supporting part 7 is positioned between the two convex rings 6. Each abutting part 7 is fixed on the inner wall of the connecting ring 4, and the two ends of the abutting part 7 around the axial direction of the large opening part 3 are fixed with the corresponding bulge parts 5. The cross section of each abutting portion 7 is gradually reduced along the axial width of the connecting ring 4 in the direction away from the inner wall of the connecting ring 4.

Circular arc groove 8 has been seted up to the lateral wall of macrostoma portion 3, and the axis of circular arc groove 8 is on a parallel with the axis of macrostoma portion 3, and circular arc groove 8 is located macrostoma portion 3 one end that is close to bellows portion 2. Arc groove 8 is equipped with threely, and three arc groove 8 sets up with three bellying 5 one-to-one to make bellying 5 correspond arc groove 8 department and be the thin wall form, reduce among the forming process because bellying 5 department is too thick to lead to the shrink inequality to arouse the product deformation. Breach groove 9 has been seted up to the lateral wall of big oral area 3, and breach groove 9 is equipped with threely, and three breach groove 9 sets up with three boss 5 one-to-one. The three notch grooves 9 are correspondingly positioned at one end of the arc groove 8 far away from the small opening part 1. Each notch groove 9 is also fixed with a reinforcing rib 10, and the reinforcing rib 10 is fixed on two inner walls of the notch groove 9 along the axial direction of the large opening part 3.

Referring to fig. 4, in actual operation, the end of the reinforcing rib 10 away from the axis of the large mouth portion 3 is flush with the outer peripheral wall of the large mouth portion, when the span of the notch groove 9 along the axis direction of the large mouth portion 3 is large, an auxiliary strip 13 is further fixed in the notch groove 9, the auxiliary strip 13 is fixed near the middle position of the reinforcing rib 10 along the axis direction of the large mouth portion 3, the auxiliary strip 13 is fixed on the inner wall of the corresponding notch groove 9 around the two ends of the axis direction of the large mouth portion 3, and the reinforcing rib 10 and the auxiliary strip 13 are both made of the same material as the large mouth portion 3 and are integrally formed.

The auxiliary strip 13 further strengthens the structural stability of the notch groove 9 around the two ends of the large opening part 3 in the axial direction, so that the circumferential stress of the large opening part 3 is more uniform, and the installation stability of the large opening part 3 is better.

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 an integral type dust cover for connect in the bell shell that periphery wall circumference evenly distributed has three recess, including little oral area (1), bellows portion (2) and big oral area (3) that connect gradually, its characterized in that: the inner wall of the large opening part (3) is integrally fixed with a connecting ring (4), and one end, close to the corrugated pipe part (2), of the connecting ring (4) is fixed with the corrugated pipe part (2); the inner wall of the connecting ring (4) is fixedly provided with three protrusions (5), the three protrusions (5) are circumferentially and uniformly distributed around the axis of the connecting ring (4), and the protrusions (5) are used for being embedded into corresponding grooves to realize sealing.

2. The one-piece dust cap of claim 1, wherein: three bellying (5) are the interval setting, every bellying (5) all are the protruding form of circular arc, bellying (5) are the circular arc transition around the both ends of big oral area (3) axis circumference and the inner wall of go-between (4).

3. The one-piece dust cap of claim 2, wherein: the inner wall of the connecting ring (4) is provided with two first convex rings (6), and the two first convex rings (6) are distributed at intervals along the axial extension direction of the large opening part (3).

4. The one-piece dust cap of claim 3, wherein: the cross section of the first convex ring (6) is gradually reduced along the axial width of the connecting ring (4) towards the direction far away from the inner wall of the connecting ring (4).

5. The one-piece dust cap of claim 3, wherein: a tight abutting part (7) is further fixed between every two adjacent protruding parts (5), the tight abutting part (7) is fixed on the inner wall of the connecting ring (4), the tight abutting part (7) is fixed with the corresponding protruding parts (5) around the two ends of the axial line of the large opening part (3) in the circumferential direction, and the tight abutting part (7) is located between the two protruding rings I (6).

6. The one-piece dust cap of claim 5, wherein: the cross section of the abutting part (7) is gradually reduced along the axial width of the connecting ring (4) towards the direction far away from the inner wall of the connecting ring (4).

7. The one-piece dust cap of claim 2, wherein: circular arc groove (8) have been seted up to the lateral wall of macrostoma portion (3), circular arc groove (8) are located macrostoma portion (3) and are close to the one end of bellows portion (2), circular arc groove (8) are equipped with threely, three circular arc groove (8) and three bellying (5) one-to-one setting.

8. The one-piece dust cap of claim 7, wherein: breach groove (9) have been seted up to the lateral wall of big oral area (3), breach groove (9) are equipped with threely, and three breach groove (9) and three boss (5) one-to-one sets up, be equipped with strengthening rib strip (10) in breach groove (9).

9. The one-piece dust cap of claim 8, wherein: still be equipped with in breach groove (9) and assist strip (13), assist strip (13) connect in corresponding breach groove (9) are wound the inner wall at macrostoma portion (3) axis both ends.

10. The one-piece dust cap of claim 1, wherein: a first ring groove (31) is coaxially formed in the outer peripheral wall of the large opening part (3); a second ring groove (11) is coaxially formed in the outer peripheral wall of the small opening part (1); and a second convex ring (12) is coaxially fixed on the inner wall of the small opening part (1).