Dustproof cover for hub bearing unit

Abstract

The utility model relates to the technical field of dustproof covers, and discloses a dustproof cover for a hub bearing unit, which comprises a cover plate, the cover plate is disc-shaped, the upper surface of the cover plate is fixedly connected with outer mounting keys at equal intervals around the circle center of the cover plate, the outer sides of the upper ends of the outer mounting keys are provided with bulges, an elastic ring is arranged above the cover plate, and the outer mounting keys are fixedly connected with the elastic ring. And the elastic ring penetrates through the upper ends of all the outer mounting keys. By arranging the outer mounting key and the protrusion, the dustproof cover can be mounted at the mounting position of the hub bearing through extrusion, the upper surface and the lower surface of the protrusion are arranged to be the cambered surface and the horizontal surface correspondingly, the cambered surface can facilitate mounting during mounting, and after mounting is completed, the lower surface of the protrusion can form a barrier; and by utilizing the metal elasticity of the elastic ring, the upper end of the outer mounting key always has a force back to the circle center, so that the dust cover is prevented from falling off due to vibration in the use process of the hub, and the anti-falling performance of the dust cover is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to dust cover technical field, concretely is dust cover for hub bearing unit. BACKGROUND

[0002] Dust cover is one of key parts at hub bearing position, and its main role is to prevent external dust, impurities from entering the bearing interior, thereby guaranteeing the best use state of bearing, prolonging its service life.

[0003] The dust cover for hub bearing unit in prior art still has certain problems, the dust cover structure design is relatively complex, leads to cost increase, and is not convenient to install, and in the use process, there is the risk of falling off. Therefore, the dust cover for hub bearing unit is provided by the technical personnel in the field to solve the problems in the above background art. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing dust cover for hub bearing unit to solve the problems in the above background art.

[0005] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A dust cover for hub bearing unit, including the cover plate, the cover plate is discoid, the upper surface of the cover plate is equidistantly fixed with the outer installation key around its center, the upper end outside of the outer installation key is provided with the protrusion and the hub bearing installation dust cover position is mutually clamped, the upper of the cover plate is provided with an elastic ring, and the elastic ring penetrates the upper end of all the outer installation keys.

[0007] As a further scheme of the utility model: the upper side of the protrusion is arranged as a curved surface, and the lower surface of the protrusion is arranged as a horizontal surface.

[0008] As a further scheme of the utility model: the upper surface of the cover plate is fixedly installed with a dustproof sealing ring, the dustproof sealing ring is annular, and the dustproof sealing ring is located on the outside of the outer installation key.

[0009] As a further scheme of the utility model: the outer edge of the dustproof sealing ring is flush with the outer edge of the cover plate.

[0010] As a further scheme of the utility model: the upper surface of the cover plate is fixedly connected with an inner installation ring, and the side surface of the inner installation ring is fixedly connected with a positioning key.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] By setting the outer installation key and the protrusion, the dust cover can be installed to the installation position of the hub bearing by extrusion, and the upper and lower surfaces of the protrusion are respectively set as arc surfaces and horizontal surfaces, the arc surfaces can facilitate installation during installation, and after installation is completed, the lower surface of the protrusion can form an obstruction, and the elastic ring is further provided, the outer end of the outer installation key always has a force away from the center of the circle by the elasticity of the elastic ring, the dust cover is prevented from falling off due to vibration during use of the hub, the anti-falling property of the dust cover is enhanced, and the dust sealing ring is further provided, the dust sealing ring abuts against the outside of the hub after installation of the dust cover is completed, a sealing effect is achieved, and dust or sewage is prevented from entering the inside from a gap. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 Structure diagram of the dust cover for the hub bearing unit;

[0014] Fig. 2 Half-cut structure diagram of the dust cover for the hub bearing unit.

[0015] In the drawing: 1, cover plate; 2, dust sealing ring; 3, inner installation ring; 4, alignment key; 5, outer installation key; 6, elastic ring; 7, protrusion. DETAILED DESCRIPTION

[0016] Please refer to Figs. 1-2 In the embodiment of the utility model, a dust cover for a hub bearing unit comprises a cover plate 1, the cover plate 1 is disc-shaped, equidistant outer installation keys 5 are fixedly connected to the upper surface of the cover plate 1 around the center of the cover plate 1, protrusions 7 are arranged on the outer side of the upper end of the outer installation keys 5 and can be clamped with the position of the hub where the dust cover is installed, and an elastic ring 6 is arranged above the cover plate 1. The elastic ring 6 can be made of elastic thin steel wires, and the elastic ring 6 penetrates the upper end of all the outer installation keys 5.

[0017] Preferably, the upper side of the protrusion 7 is arc-shaped, and the lower surface of the protrusion 7 is horizontally arranged.

[0018] Preferably, a dust sealing ring 2 is fixedly installed on the upper surface of the cover plate 1, the dust sealing ring 2 is annular, and the dust sealing ring 2 is located on the outer side of the outer installation keys 5.

[0019] Preferably, the outer edge of the dust sealing ring 2 is flush with the outer edge of the cover plate 1.

[0020] Preferably, an inner installation ring 3 is fixedly connected to the middle of the upper surface of the cover plate 1, and an alignment key 4 is fixedly connected to the side surface of the inner installation ring 3.

[0021] The working principle of the utility model is: when installing the dust cover, the inner installation ring 3 and the alignment key 4 are aligned with the groove position of the hub bearing, then the dust cover is installed by pressing, because the upper surface of the protrusion 7 is arc-shaped, the arc surface is used to extrude the edge of the installation position of the hub bearing cover, and in the extruding process, the outer installation key 5 will be offset towards the center of the dustproof sealing ring 2, and in this process, the elastic ring 6 is also extruded and deformed, the elastic ring 6 between the two adjacent outer installation keys 5 will be bent towards the inner side, until the protrusion 7 is extruded into the inner side of the hub installation position, under the elasticity of the outer installation key 5 and the elasticity of the elastic ring 6, the outer installation key 5 resets, the lower surface of the protrusion 7 abuts on the installation position, and because the upper surface of the cover plate 1 is also provided with the dustproof sealing ring 2, the dustproof sealing ring 2 will be attached to the outer side of the hub at this time, which can play a sealing effect, avoiding dust or sewage from entering the inside from the gap.

[0022] The above is only the preferred embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A dust cover for a wheel hub bearing unit comprising a cover plate (1), characterized in that: The cover plate (1) is discoid, equidistantly fixed with outer installation keys (5) on its upper surface around its center, the upper end outer side of the outer installation keys (5) is provided with protrusions (7) which are mutually clamped with the position of the dust cover of the hub bearing installation, the upper side of the cover plate (1) is provided with an elastic ring (6) which penetrates the upper end of all the outer installation keys (5).

2. The dust cover for a hub bearing unit according to claim 1, characterized in that: The upper side of the protrusions (7) is arc surface, the lower surface of the protrusions (7) is horizontal surface.

3. The dust cover for a hub bearing unit according to claim 1, characterized in that: The upper surface of the cover plate (1) is fixedly installed with a dustproof sealing ring (2), the dustproof sealing ring (2) is annular, and the dustproof sealing ring (2) is located outside the outer installation keys (5).

4. The dust cover for a hub bearing unit according to claim 3, characterized in that: The outer edge of the dustproof sealing ring (2) is flush with the outer edge of the cover plate (1).

5. The dust cover for a hub bearing unit according to claim 1, characterized in that: The upper surface of the cover plate (1) is fixedly connected with an inner installation ring (3), the side surface of the inner installation ring (3) is fixedly connected with an alignment key (4).

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