CN212106695U - Anti-fracture dustproof sleeve - Google Patents

Abstract

The utility model discloses a prevent dirt guard that splits relates to dirt guard technical field, and it is including the little oral area, bellows portion and the big oral area 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 is coaxial still to be provided with annular bulge loop. The wall thickness of the small opening part is thickened, so that the fracture condition of the small opening part in the long-term use process is reduced, and the integral use is more durable.

Description

Anti-fracture dustproof sleeve

Technical Field

The utility model relates to a dirt proof boot technical field, more specifically say, it relates to an anti-fracture dirt proof boot.

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.

The existing dust cover comprises a small opening part, a corrugated pipe part and a large opening part which are connected in sequence, and the thickness of the small opening part and the thickness of the large opening part are both 1.75 mm.

The wall thickness range of one end of a small opening of the existing dust cover is usually 1.7-1.8mm, but in practical application, the small opening is easy to break in long-term use, and particularly in winter in the north, the phenomenon is more obvious and troublesome and needs to be improved.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model provides a prevent dirt guard that splits, it has the cracked advantage of reducing osculum end appearance.

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

the utility model provides an anti-fracture dirt guard, includes the little oral area, bellows portion and the macrostoma portion that connect gradually, the wall thickness d of little oral area is 2.3-2.4mm, the inside wall of little oral area still coaxial be provided with annular bulge loop.

Through above-mentioned technical scheme, through the wall thickness thickening with little oral area, through actual attempt, after wall thickness is greater than 2.3mm, also the condition of fracture rarely takes place in chilly north to reduce the fracture condition of little oral end in long-term use, make holistic use more lasting.

In addition, because the thickness thickening of osculum end, when it was installed to the universal joint and was used, osculum end material is too thick can cause the shrink inequality to arouse the product to warp, leads to appearing the gap easily between osculum end and the universal joint, leads to the not good condition of sealed effect. Through the setting of annular bulge loop, the axial region annular through annular bulge loop embedding universal joint carries out the location sealing, has reduced the deformation of osculum end and has leaded to sealed not good condition to make holistic use leakproofness better.

The present invention may be further configured in a preferred embodiment as: the lateral wall of the small opening part is provided with a positioning ring groove, and the positioning ring groove is correspondingly arranged on the outer side of the annular bulge.

Through above-mentioned technical scheme, when the dirt proof boot used, the mounting can further be fixed the dirt proof boot in corresponding embedding positioning ring groove to make the connection of dirt proof boot more stable.

The present invention may be further configured in a preferred embodiment as: be formed with transition portion between tang portion and the bellows portion, the one end that transition portion is close to tang portion outwards thickens the setting, and the wall thickness of transition portion is followed tang portion court the direction taper setting of bellows portion.

Through above-mentioned technical scheme, transition portion thickening mainly also reduces the condition of taking place fracture in osculum portion and bellows portion transition department, and the gradual change of transition portion sets up in addition for it is more convenient to produce on the whole, and bellows portion mainly can relax through the elastic shrinkage and the expansion of bellows portion in addition, and holistic intensity requirement is not so high as osculum end, makes holistic structure set up more rationally.

The present invention may be further configured in a preferred embodiment as: bellows portion includes a plurality of crests and a plurality of trough that are located between the adjacent crest, and the diameter of trough is less than the diameter setting of adjacent both sides crest, and the diameter of a plurality of crests sets up from the direction grow gradually of little oral area to big oral area, and the diameter of a plurality of troughs sets up from the direction grow gradually of little oral area to big oral area.

Through above-mentioned technical scheme, when the universal joint is buckled, such setting up of bellows portion makes the axle of universal joint macrostoma end difficult in the turn-round in-process influence extrusion with the discovery of the trough inside wall of bellows portion, has reduced the damaged condition of bellows portion because of extruding two leads to for holistic use is more lasting.

The present invention may be further configured in a preferred embodiment as: the wall thickness D of the large opening part is 1-1.1 mm.

Through above-mentioned technical scheme, during the in-service use, big oral area corresponds and is connected to the bell shell, and big oral area is big with the contact surface of bell shell, and stress is comparatively dispersed, and big oral area passes through bellows portion buffering back, and holistic intensity requirement is far less than little oral area, through after the actual attempt, and the wall thickness is greater than 1mm and all can satisfy actual demand to make holistic structure more reasonable.

The present invention may be further configured in a preferred embodiment as: the inside wall of macrostoma portion is provided with two annular archs, the lateral wall correspondence of macrostoma portion is provided with two ring channels, two the ring channel one-to-one sets up in the bellied outside of annular.

Through the technical scheme, based on the thinning of the thickness of the large opening, under the condition that a single fixing piece is fastened and continuously stressed, the large opening is easy to break, the two annular bulges and the annular groove are arranged, the large opening is positioned through the two annular bulges, then the two fixing pieces are embedded into the annular groove for further fastening, the fastening force can be dispersed by the two fixing pieces, the stress concentration condition of the single position of the large opening is reduced, and the connection of the large opening and the bell-shaped shell is more stable and firm.

The present invention may be further configured in a preferred embodiment as: the annular convex ring and the annular bulge are both arranged in a circular arc bulge mode.

Through the technical scheme, the circular convex ring and the circular convex are more convenient to adapt to the corresponding slot position of the universal joint due to the arrangement of the circular arc convex.

The present invention may be further configured in a preferred embodiment as: the little oral area, bellows portion and macrostoma portion integrated into one piece set up and the material is TPE.

Through above-mentioned technical scheme, TPE is a thermoplastic elastomer material, has high strength, high resilience, and its sense of touch is soft, weatherability, fatigue resistance and temperature toleration, and the processability is superior, need not vulcanize, can recycle reduce cost. When being applied to the dirt proof boot for the life of dirt proof boot is more lasting.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the wall thickness of the small opening part is thickened, so that the fracture condition of the small opening part in the long-term use process is reduced, and the integral use is more durable;

(2) the transition part is thickened, so that the condition that the transition part between the small-opening part and the corrugated pipe part is broken is mainly reduced, and the integral use is more durable;

(3) through setting up two annular protrusion and ring channel, reduced the condition of big oral area single position stress concentration for the connection of big oral area and bell shell is more stable firm.

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 an enlarged view of portion A of FIG. 2;

fig. 4 is an enlarged view of the portion B in fig. 2.

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. an annular convex ring; 5. a positioning ring groove; 6. a transition section; 7. an annular projection; 8. an annular groove.

Detailed Description

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

Example (b):

the utility model provides an anti-fracture dirt proof boot, as shown in figure 1, is including the little oral area 1, bellows portion 2 and the macrostoma 3 that connect gradually, and little oral area 1, bellows portion 2 and 3 integrated into one piece of macrostoma set up and the material is TPE. 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 a plurality of trough 22 that are located between the adjacent crest 21, and the diameter of trough 22 is less than the diameter setting of adjacent both sides crest 21, and the diameter of a plurality of crests 21 is from the direction grow setting gradually of small portion 1 to macrostoma 3, and the diameter of a plurality of troughs 22 is from the direction grow setting gradually of small portion 1 to macrostoma 3.

As shown in FIGS. 2 and 3, the small mouth portion 1 has a wall thickness d of 2.3 to 2.4mm, and after the wall thickness d is larger than 2.3mm, breakage rarely occurs in the cold north. The inner side wall of the small opening part 1 is also coaxially provided with an annular convex ring 4, and the annular convex ring 4 is arranged in a circular arc-shaped protruding mode. The outer side wall of the small opening part 1 is provided with a positioning ring groove 5, and the positioning ring groove 5 is correspondingly arranged on the outer side of the annular bulge 7.

A transition part 6 is formed between the small opening part 1 and the corrugated pipe part 2, one end of the transition part 6 close to the small opening part 1 is arranged in an outward thickening mode, and the wall thickness of the transition part 6 is gradually reduced from the small opening part 1 to the corrugated pipe part 2.

As shown in fig. 2 and 4, the wall thickness D of the large mouth portion 3 is 1-1.1mm, the large mouth portion 3 is correspondingly connected to the bell-shaped shell, the contact surface between the large mouth portion 3 and the bell-shaped shell is large, the stress is dispersed, after the large mouth portion 3 is buffered by the bellows portion 2, the overall strength requirement is far smaller than that of the small mouth portion 1, and the actual requirement can be met when the wall thickness is larger than 1 mm. The inside wall of macrostoma portion 3 is provided with two annular arch 7, and two annular arch 7 all are the protruding setting of circular arc. The lateral wall of macrostoma portion 3 corresponds and is provided with two ring channels 8, and two ring channels 8 one-to-one set up in the outside of annular bulge 7.

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 (8)

1. The utility model provides an anti-fracture dirt proof boot, is including little oral area (1), bellows portion (2) and big oral area (3) that connect gradually, its characterized in that: the wall thickness d of the small opening part (1) is 2.3-2.4mm, and an annular convex ring (4) is coaxially arranged on the inner side wall of the small opening part (1).

2. The fracture-preventing dust boot of claim 1, wherein: locating ring groove (5) have been seted up to the lateral wall of tang portion (1), locating ring groove (5) correspond to set up in the outside setting of annular bulge (7).

3. The fracture-preventing dust boot of claim 2, wherein: be formed with transition portion (6) between tang portion (1) and bellows portion (2), the one end that transition portion (6) are close to tang portion (1) outwards thickens the setting, and the wall thickness of transition portion (6) is followed tang portion (1) court the direction taper setting of bellows portion (2).

4. The fracture-preventing dust boot of claim 2, wherein: bellows portion (2) include a plurality of crests (21) and a plurality of trough (22) that are located between adjacent crest (21), and the diameter of trough (22) is less than the diameter setting of adjacent both sides crest (21), and the diameter of a plurality of crests (21) is from the direction grow setting gradually of little oral area (1) to big oral area (3), and the diameter of a plurality of troughs (22) is from the direction grow setting gradually of little oral area (1) to big oral area (3).

5. The fracture-preventing dust boot of claim 1, wherein: the wall thickness D of the large opening part (3) is 1-1.1 mm.

6. The fracture-preventing dust boot of claim 5, wherein: the inside wall of macrostoma portion (3) is provided with two annular protrusion (7), the outside wall correspondence of macrostoma portion (3) is provided with two ring channel (8), two ring channel (8) one-to-one sets up in the outside of annular protrusion (7).

7. The fracture-preventing dust boot of claim 6, wherein: the annular convex ring (4) and the annular bulge (7) are both arranged in a circular arc bulge manner.

8. The fracture-preventing dust boot of claim 6, wherein: little oral area (1), bellows portion (2) and big oral area (3) integrated into one piece set up and the material is TPE.

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