Sealed hub cap

Abstract

The utility model discloses a sealed connection's wheel hub cover, including connecting portion, the connecting portion includes cylinder, the cylinder is with the center hole portion shape matching of wheel hub and inserts the cooperation, the outside of cylinder is surrounded with the extension and is provided with, the extension is provided with the installation slot of extension along the circumference, the annular movable piece of being provided with in the installation slot slidingly inserts, still be provided with a plurality of spring of connecting installation slot inner wall and annular movable piece in the installation slot, the side of annular movable piece is provided with sealing washer no. 1 close to wheel hub. The utility model discloses through setting up cylinder, extension, annular movable piece, spring and sealing washer no. 1 etc. Synergistic structure in the connecting portion of center cover, cylinder and wheel hub center hole portion insert the cooperation, realize accurate positioning, and the circumferential installation slot of setting up on extension inlay has the annular movable piece of being movable to the axis, and through spring to its constant elastic force, make sealing washer no. 1 always closely adhere to the end portion contact surface of wheel hub center hole portion.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and in particular relates to wheel hub caps with sealed connections. Background Technology

[0002] In the structure of automobile wheel hubs, the center hole of the wheel hub is used to install key components such as wheel hub bearings, bolts, or drive shafts. To prevent contaminants such as water, mud, and dust from entering the interior through the gap between the wheel hub cover and the center hole of the wheel hub, a sealing structure is usually provided on the wheel hub cover. However, existing technologies often rely solely on a single rubber gasket or O-ring for end face or radial sealing. This rigid connection structure often lacks adaptive compensation capabilities and is difficult to maintain a continuous and effective sealing contact pressure. Utility Model Content

[0003] This utility model addresses the problems in the prior art by proposing the following technical solution: This utility model provides a wheel hub cover with a sealed connection, comprising: A large cover and a central cover disposed on the large cover, the central cover including a connecting portion disposed on its inner side; The connecting part includes a cylindrical body, which matches the shape of the central hole of the hub and is inserted into it. An extension is provided around the outer side of the cylindrical body. The extension is provided with a circumferentially extending mounting groove. An axially movable annular block is slidably embedded in the mounting groove. Several springs are also provided in the mounting groove to connect the inner wall of the mounting groove and the annular block. A sealing gasket is provided on the side of the annular block near the hub. In its natural state, the spring applies a spring force to the annular block toward the hub, so that the sealing gasket is always in close contact with the end contact surface of the central hole of the hub.

[0004] As a preferred embodiment of the above technical solution, a second sealing gasket is also included, which is fixedly sleeved on the cylinder and closely adheres to the internal contact surface of the center hole of the hub.

[0005] As a preferred embodiment of the above technical solution, the sealing gasket is further provided with a plurality of sealing rings of different diameters at one end near the central hole, and the sealing rings are embedded in the end contact surface of the central hole.

[0006] As a preferred embodiment of the above technical solution, the center cover further includes a decorative surface disposed on its outer side.

[0007] As a preferred embodiment of the above technical solution, the cover includes a frame portion located at the edge, and an insertion portion is provided on the inner side of the frame portion.

[0008] The beneficial effects of this utility model are as follows: This invention features a collaborative structure consisting of a cylinder, an extension, an annular movable block, a spring, and a sealing gasket in the connecting part of the center cover. The cylinder is inserted into the center hole of the wheel hub for precise positioning. The circumferential mounting groove on the extension is fitted with an axially movable annular movable block, which is subjected to a constant elastic force by a spring. This ensures that the sealing gasket remains tightly fitted to the end contact surface of the center hole of the wheel hub. Even under conditions of manufacturing tolerances, thermal deformation, or vibration, it can dynamically maintain effective sealing contact pressure, thereby improving the protection level of the center hole area of ​​the wheel hub against contaminants such as water, mud, and dust. This effectively protects key components such as bearings and bolts inside the wheel hub, extends their service life, and enhances the safety and reliability of the entire vehicle. Attached Figure Description

[0009] Figure 1 The diagram shown is a front view (outer side) of the hubcap in the embodiment. Figure 2 The diagram shown is a structural schematic of the fit between the hubcap and the hub in the embodiment. Figure 3 What is shown is Figure 2 Enlarged schematic diagram of the structure at point A in the diagram; Reference numerals: 1. Hub; 2. Center hole; 10. Large cover; 20. Center cover; 11. Frame; 12. Insertion part; 21. Decorative surface; 30. Connecting part; 31. Cylindrical body; 32. Extension part; 33. Mounting groove; 34. Spring; 35. Movable block; 36. Sealing gasket one; 37. Sealing gasket two; 38. Sealing ring. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0011] Example like Figure 1 , Figure 2 As shown, Figure 1 The diagram shown is a front view (outer side) of the hubcap in the embodiment. Figure 2 The diagram shown is a structural schematic of the fit between the hubcap and the hub in the embodiment. This device includes: The large cover 10 and the center cover 20 are disposed in the center part of the large cover 10. The center cover 20 includes a decorative surface 21 disposed on its outer side and a connecting part 30 disposed on its inner side.

[0012] The hub 1 has a central hole 2, the cover 10 is fitted onto the hub 1, and the connecting part 30 of the central cover 20 is connected to the central hole 2 of the hub 1.

[0013] The decorative surface 21 is located on the outer side (i.e., the visible side facing the outside of the vehicle) and usually features branding (such as a logo) or other decorative patterns, primarily to enhance the aesthetics of the appearance.

[0014] The connecting part 30 is located on the inner side (i.e. the side facing the hub 1) and is used to connect with the center hole 2 of the hub 1 to achieve positioning and sealing.

[0015] The cover 10 includes a frame portion 11 located at the edge, and a plug portion 12 is provided on the inner side of the frame portion 11.

[0016] The insertion part 12 is used to cooperate with the insertion groove structure of the hub 1 to fix the whole device.

[0017] Specifically, the insertion part 12 and the insertion slot can be used to fix the overall device initially, and then bolts can be used to achieve final locking.

[0018] like Figure 2 , Figure 3 As shown, Figure 2 The diagram shown is a structural schematic of the fit between the hubcap and the hub in an embodiment. Figure 3 What is shown is Figure 2 Enlarged schematic diagram of the structure at point A in the diagram; The connecting part 30 includes a cylindrical body 31, which is shaped and plugged into the central hole 2. An extension 32 is provided around the outer side of the cylindrical body 31. A mounting groove 33 extending circumferentially is provided on the extension 32. An annular movable block 35 that can move axially is slidably embedded in the mounting groove 33. A plurality of springs 34 connecting the inner wall of the mounting groove 33 and the annular movable block 35 are also provided in the mounting groove 33. A sealing gasket 36 is provided on the side of the annular movable block 35 near the hub 1. In the natural state, the spring 34 applies a spring force toward the hub 1 to the annular movable block 35, so that the sealing gasket 36 is always in close contact with the end contact surface of the central hole 2.

[0019] The shape of the cylinder 31 matches the central hole 2 on the hub 1. The cylinder 31 can be inserted into the central hole 2 to achieve initial positioning and axial guidance. The extension 32 is arranged around the outside of the cylinder 31 to form an annular base platform. The mounting groove 33 is provided on the extension 32 and extends circumferentially (i.e., in an annular groove) to accommodate the annular movable block 35 and the spring 34. The annular movable block 35 is slidably embedded in the mounting groove 33 and can move axially (i.e. towards or away from the hub 1). In its natural state, the spring 34 applies a spring force to the annular movable block 35 towards the hub 1, so that the sealing gasket 36 is always in close contact with the end contact surface of the central hole 2. The sealing gasket 36 is made of elastic material (such as rubber, silicone, etc.). Under the action of the spring 34, the sealing gasket 36 is continuously pressed against the end face of the hub 1 to form a continuous static seal.

[0020] The sealing gasket 36 is provided with several sealing rings 38 of different diameters at one end near the central hole 2. The sealing rings 38 are embedded in the end contact surface of the central hole 2.

[0021] The sealing ring 38 is located at one end of the sealing gasket 36 near the central hole 2 and includes several concentric annular sealing rings (such as O-rings or lip seals) of different diameters. During assembly, these sealing rings are embedded in the corresponding annular grooves on the end contact surface of the central hole 2 to form a multi-stage radial and axial composite seal, which further effectively prevents water, dust and mud from entering.

[0022] It also includes a second sealing gasket 37, which is fixedly sleeved on the cylinder 31. After the cylinder 31 is inserted into the central hole 2, the second sealing gasket 37 is tightly attached to the inner contact surface of the central hole 2.

[0023] When the cylinder 31 is inserted into the center hole 2 of the hub 1, the sealing gasket 37 fits tightly against the inner wall (internal contact surface) of the center hole 2 to form a radial seal, preventing water, dust and other substances from entering the interior of the hub 1 through the gap between the cylinder 31 and the inner wall of the center hole 2.

[0024] Typically, sealing gasket 237 can be in the form of O-rings, D-rings, or encapsulated rubber rings, and the material is a weather-resistant elastomer (such as EPDM, silicone, or fluororubber), which has good compression resilience and wear resistance.

[0025] Working principle: During assembly, the frame 11 of the large cover 10 is first pre-positioned and fitted with the insertion groove on the hub 1 through the insertion part 12 to achieve pre-fixation; then, the connecting part 30 of the center cover 20 is inserted into the center hole 2 of the hub 1. At this time, the sealing gasket 37, which is sleeved on the outer circumference of the cylinder 31, is tightly attached to the inner wall of the center hole 2, forming the first radial seal; at the same time, the annular movable block 35 on the extension 32 is pressed axially against the sealing gasket 36 under the elastic force of the spring 34, so that it is always tightly attached to the end contact surface of the center hole 2, forming the second axial static seal; in addition, the multi-level sealing rings 38 with different diameters set on the end face of the sealing gasket 36 are embedded in the corresponding annular grooves on the end face of the hub, forming a multi-entwined sealing structure; finally, the entire device is locked with bolts, etc., to complete the installation.

[0026] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A wheel hub cover with a sealed connection, characterized in that, include: The large cover (10) and the center cover (20) disposed on the large cover (10), the center cover (20) including the connecting part (30) disposed on its inner side; The connecting part (30) includes a cylindrical body (31), which matches the shape of the central hole of the hub and is inserted into it. An extension (32) is provided around the outer side of the cylindrical body (31). An installation groove (33) extending circumferentially is provided on the extension (32). An annular movable block (35) that can move axially is slidably embedded in the installation groove (33). A plurality of springs (34) connecting the inner wall of the installation groove (33) and the annular movable block (35) are also provided in the installation groove (33). A sealing gasket (36) is provided on the side of the annular movable block (35) near the hub. In the natural state, the spring (34) applies a spring force toward the hub to the annular movable block (35), so that the sealing gasket (36) is always in close contact with the end contact surface of the central hole of the hub.

2. The wheel hub cover with a sealed connection according to claim 1, characterized in that, It also includes a second sealing gasket (37), which is fixedly sleeved on the cylinder (31) and closely adheres to the inner contact surface of the center hole of the hub.

3. The wheel hub cover with a sealed connection according to claim 1, characterized in that, The sealing gasket (36) is provided with several sealing rings (38) of different diameters at one end near the central hole. The sealing rings (38) are embedded in the end contact surface of the central hole.

4. The wheel hub cover with a sealed connection according to claim 1, characterized in that, The center cover (20) also includes a decorative surface (21) disposed on its outer side.

5. The wheel hub cover with a sealed connection according to claim 1, characterized in that, The cover (10) includes a frame portion (11) located at the edge, and an insertion portion (12) is provided on the inner side of the frame portion (11).

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