Deep sealing dust cover for intermediate shaft

Abstract

The utility model relates to a deep sealing dust cover for an intermediate shaft of a steering system. Comprising a cover plate, a dust cover body and a sealing assembly, the dust cover body is divided into a cover plate connecting part, a corrugated part and a sealing assembly connecting part, the cover plate connecting part is connected with the cover plate in a clamped mode, the sealing assembly connecting part is detachably connected with the sealing assembly, and the sealing assembly comprises an outer framework, a bearing and an oil seal. A ball bearing and an oil seal are arranged in the outer framework, a groove is formed in an inner ring of the bearing, and a sealing rib is arranged in the groove. The novel sealing assembly for the dust cover is composed of the two bearings and the oil seal, and the sealing ribs are installed on the inner rings of the bearings, so that the sealing assembly is in close contact with an intermediate shaft, and the sealing effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile steering system, concretely is the depth seal dust cover for intermediate shaft of steering system. BACKGROUND

[0002] The automobile steering system includes a steering wheel, a steering column, an intermediate shaft and a steering gear, and the function is to transmit the steering intention of the driver to the tires, so as to change the direction of the automobile. The intermediate shaft is sealed by a dust cover between the automobile front cover plate, mainly plays the role of waterproof, sound insulation, dustproof, its quality directly affects the sealing performance and noise level of the whole vehicle.

[0003] For example, the prior art patent application No. 202110250680.2, the patent name is a kind of dynamic sealing structure's steering single-layer dust cover, dust cover includes rubber sealing cap 100, sealing cover plate plastic body, connecting support 200, bearing connecting piece 300, bearing cover plate 400, first bearing sleeve 500 and second bearing sleeve 600;The lower end of the sealing cover plate plastic body is provided with assembly protrusion, rubber sealing cap is provided with assembly groove matched with assembly protrusion, the rubber sealing cap is provided with several groups of rubber buckle, the sealing cover plate plastic body is provided with buckle assembly hole matched with rubber buckle;The bearing connecting piece is installed in rubber sealing cap, bearing connecting piece is installed with connecting support and bearing cover plate in it, the inner ring of connecting support is provided with the first inner ring groove matched with first bearing sleeve;The inner ring of bearing cover plate is provided with the second inner ring groove matched with second bearing sleeve. Dust cover sealing mainly relies on the interference force of first bearing sleeve, second bearing sleeve and intermediate shaft and the grease 700 filled between first bearing sleeve, second bearing sleeve and bearing cover plate and connecting support to realize sealing, this sealing mode has certain limit to the water depth of whole vehicle, and the water depth is about 300-500mm. When long time operation or water depth reaches certain limit value (500mm) pressure, grease will be squeezed out, dust cover loses effect, leading to water in vehicle cabin, water will flow into driving cabin from the gap between first bearing sleeve, second bearing sleeve and bearing cover plate and connecting support, causing electrical components failure or cabin parts rust, affecting driving safety, and prone to safety accidents.

[0004] Therefore, it is necessary to improve the sealing structure of dust cover to further increase the water depth of automobile and enhance safety. SUMMARY

[0005] The utility model aims at providing a kind of depth seal dust cover for intermediate shaft, which has good sealing performance, strong waterproof, sound insulation and dustproof performance.

[0006] The technical scheme of the utility model comprises:

[0007] A deep-sealed dust cover for an intermediate shaft includes a cover plate, a dust cover body, and a sealing assembly. The dust cover body is divided into a connecting cover plate part, a corrugated part, and a connecting sealing assembly part. The connecting cover plate part is snapped into the cover plate, and the connecting sealing assembly part is detachably connected to the sealing assembly. The sealing assembly includes an outer frame, a bearing, and an oil seal. The outer frame is equipped with a ball bearing and an oil seal. The inner ring of the bearing has a groove, and a sealing rib is installed in the groove.

[0008] The beneficial effects of this utility model are:

[0009] 1. The novel sealing assembly for the dust cover of this application consists of two bearings and an oil seal. The inner ring of the bearing is equipped with a sealing rib, which makes close contact with the intermediate shaft and provides a good sealing effect.

[0010] 2. The dust cover of this application is equipped with a specially structured oil seal. The two sealing edges of the oil seal fit tightly against the intermediate shaft. When water comes in, the water will press against the sealing edges towards the intermediate shaft through the angled notch annular groove, thus making the sealing edges fit better against the intermediate shaft and providing good sealing performance. In addition, a large amount of grease is stored in the space between the outer edge, the connecting edge, and the sealing strip, which further enhances the sealing performance.

[0011] 3. The connecting sealing component of the dust cover body of this application tightly wraps the sealing component and then fixes it with clamps, etc., to firmly fix the dust cover body and the sealing component.

[0012] 4. Vehicles equipped with the dust cover of this application can wade through water up to 1 meter deep. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of the deep-sealed dust cover for the intermediate shaft in this application.

[0015] Figure 2 This is a cross-sectional view of the deep sealing dust cover for the intermediate shaft of this application.

[0016] Figure 3 This is an enlarged structural diagram of the connecting cover plate and sealing assembly of the main body of the intermediate shaft dust cover of this application.

[0017] Figure 4 This is an enlarged view of the sealing assembly of the deep-sealed dust cover for the intermediate shaft of this application.

[0018] Figure 5This is an enlarged view of the oil seal portion of the deep-sealed dust cover for the intermediate shaft in this application.

[0019] Figure 6 This is a schematic diagram of a dust cover structure in the prior art.

[0020] Figure label:

[0021] Cover plate 1; Dust cover body 2; Sealing assembly 3; Connecting cover plate part 21; Corrugated part 22; Connecting sealing assembly part 23; Outer frame 31; Ball bearing 32; Oil seal 33; Sealing rib 34; Inner flange 231; Outer flange 232; Connecting part 233; Raised rib ring 234; Clamp 235; Outer edge 331; Connecting edge 332; Beveled edge 333; Sealing edge 334; Angle notch groove 335. Detailed Implementation

[0022] In order to solve the problems in the background art, this application presents a deep-sealed dust cover for intermediate shafts, which has good sealing performance and prevents leakage.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that in the description of this utility model, the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] A deep-sealed dust cover for an intermediate shaft includes a cover plate 1, a dust cover body 2, and a sealing assembly 3. The dust cover body 2 is divided into a connecting cover plate part 21, a corrugated part 22, and a connecting sealing assembly part 23. The connecting cover plate part 21 is snapped to the cover plate 1, and the connecting sealing assembly part 23 is detachably connected to the sealing assembly 3. The connection is shown in the figure through a clamp.

[0026] The sealing assembly 3 includes an outer frame 31, ball bearings 32, and an oil seal 33. Two ball bearings 32 and an oil seal 33 are press-fitted into the inner ring of the outer frame 31. The inner ring of each ball bearing 32 has a groove containing an interference-fit rubber sealing rib 34. The outer frame is formed by stamping outside the two bearings and the oil seal, or fixed to the outside of the two bearings and the oil seal by other means. The ball bearings of the sealing assembly are tightly fitted to the intermediate shaft. This application's sealing assembly uses an oil seal and bearing structure, with two additional rubber sealing ribs inside the bearings to further enhance sealing performance.

[0027] The connecting sealing assembly 23 of the dust cover body consists of an inner flange 231, an outer flange 232, a connecting part 233, and two raised rings 234. The inner flange 231 and the outer flange 232 extend inward (towards the central axis), and the connecting part 233 connects the inner flange 231 and the outer flange 232. Two raised rings 234 are provided on the outer side of the connecting part. The inner flange and the outer flange enclose the sealing assembly, and the dust cover body and the sealing assembly are clamped together between the two raised rings by clamps or the like. A clamp 234 is provided between the two raised rings 234, and the clamp 235 clamps the sealing assembly 3 and the connecting sealing assembly 23.

[0028] The oil seal 33 consists of an outer edge 331, a connecting edge 332, and a sealing strip. The outer edge 331 extends inward toward the corrugated part of the dust cover to form the connecting edge 332. The inner end of the connecting edge 332 is the sealing strip, which consists of a beveled edge 333 and two sealing edges 334. The connecting edge 332 extends inward to form the beveled edge 333, and the inner end of the beveled edge 333 forms the two sealing edges 334. The two sealing edges 334 form a certain angle, and a certain angled notch groove 335 is formed between the beveled edge 333 and the sealing edge 334 on the side facing the corrugated part of the dust cover. There is a gap between the sealing edge on the side away from the corrugated part of the dust cover and the ball bearing.

[0029] The oil seal of this application is made of rubber material. In the attached drawing, the sealing strip of the oil seal has a "Y"-shaped cross-section, with a certain angle between the two sealing edges, allowing for better contact with the intermediate shaft and good sealing performance. An angled notch groove is formed between the inclined edge and one of the sealing edges. This angled notch groove faces the corrugated part of the dust cover. When the water pressure increases, water flows into the angled notch groove, and the pressure impacts the notch groove, causing the sealing edge to deform and press against the intermediate shaft, increasing the sealing performance. The sealing assembly of this application has a good sealing effect, increasing the wading depth of the vehicle to 1 meter.

[0030] The space between the outer edge, connecting edge, and sealing strip of the oil seal in this application can hold a large amount of grease. Because there is a gap between the sealing edge away from the corrugated part of the dust cover and the ball bearing, the large amount of grease in the space between the outer edge, connecting edge, and sealing strip can flow to the surface of the intermediate shaft. Furthermore, the space between the two sealing edges is also filled with grease, which improves the sealing effect and prevents the grease from being thrown out. Compared to existing oil seals, this application has more internal space for grease, resulting in better sealing and lubrication and no abnormal noise (increasing the amount of grease inside the oil seal and bearing structure effectively solves the problem of noise from the dust cover caused by rotation).

[0031] Existing oil seals require springs to secure the inner and outer rings, but these springs are prone to rust and are not wear-resistant. This application eliminates the need for springs, achieving a seal through an angled notch groove and a large amount of grease.

[0032] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art, inspired by this description, design similar structures and implementations to the above embodiments without departing from the technical essence of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A deep-sealed dust cover for an intermediate shaft, characterized in that: The device includes a cover plate, a dust cover body, and a sealing assembly. The dust cover body is divided into a connecting cover plate part, a corrugated part, and a connecting sealing assembly part. The connecting cover plate part is snapped into the cover plate, and the connecting sealing assembly part is detachably connected to the sealing assembly. The sealing assembly includes an outer frame, a bearing, and an oil seal. The outer frame is equipped with a ball bearing and an oil seal. The inner ring of the bearing has a groove, and a sealing rib is installed in the groove.

2. The deep-sealed dust cover for an intermediate shaft according to claim 1, characterized in that: The connecting sealing assembly of the dust cover body consists of an inner flange, an outer flange, a connecting part, and two protruding ribs. The inner flange and the outer flange extend inward, and the connecting part connects the inner flange and the outer flange. Two protruding ribs are provided on the outer side of the connecting part.

3. The deep-sealed dust cover for an intermediate shaft according to claim 1, characterized in that: The oil seal is divided into an outer edge, a connecting edge, and a sealing strip. The outer edge extends inward toward the corrugated part of the dust cover to form a connecting edge. The inner end of the connecting edge is a sealing strip. The sealing strip is divided into a bevel and two sealing edges. The connecting edge extends inward to form a bevel, and the inner end of the bevel forms two sealing edges. The two sealing edges form a certain angle. A certain angle notch groove is formed between the bevel and the sealing edge on the side facing the corrugated part of the dust cover. There is a gap between the sealing edge on the side away from the corrugated part of the dust cover and the ball bearing.

4. A deep-sealed dust cover for an intermediate shaft according to claim 2, characterized in that: A clamp is provided between the two convex rings, which clamps the sealing component and the dust cover body of the connecting sealing component.

5. A deep-sealed dust cover for an intermediate shaft according to claim 1, characterized in that: The ball bearings are two or more.

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