Detachable rubber sealing cover for steering engine

Abstract

The utility model relates to the technical field of automobile electric power steering machines, in particular to a detachable rubber sealing cover for a steering machine, which comprises a metal framework and rubber, the rubber is coated outside the metal framework, a plurality of sealing lips are arranged on the periphery of the rubber, and an upward raised upright post is arranged in the center of the top of the rubber. A flange protruding outwards is arranged on the edge of the top of the rubber, and a plurality of protruding points are evenly arranged at the bottom of the rubber. Compared with the prior art, the sealing lip matched with the hole wall of the inner hole of the shell is designed, so that the effective sealing area is enlarged, and the sealing function is ensured; the flange matched with the annular groove of the shell is designed, the limiting and anti-falling functions are achieved, and disassembly and assembly are convenient and fast; the arrangement of the stand column facilitates disassembly and reworking of the sealing cover, and the sealing cover can be repeatedly disassembled, assembled and used. The utility model has the advantages of low cost and wide applicability.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile electric power steering machines, in particular to a detachable rubber sealing cover for a steering machine. Background Art

[0002] As a commonly used mechanical part in automobile electric power steering, the sealing cover is used for the protective sealing of various metal shell ports in the mechanical system, such as the reducer servo cover, worm end cover, gear shaft tail screw cover, belt adjustment hole plug cover, etc.

[0003] There are three commonly used sealing cover design schemes: Scheme 1 is a metal screw cover with thread glue coating; Scheme 2 is a plastic cover with a sealing ring; Scheme 3 is a metal frame rubber cover.

[0004] However, the metal screw cover of Option 1 is affected by the quality of the thread glue coating, the sealing is not very stable, and the production line cannot be reworked; Option 2 has reliable sealing, but the plastic cover needs to be designed with snaps or fastened with screws, and the installation of the sealing ring needs to be 100% inspected online to avoid missing installation; Option 3 uses a composite process of rubber-coated metal, which achieves sealing and anti-slipping through interference fit and the barb groove of the shell hole. The installation force is large, and the outer layer of glue will be destroyed during disassembly and cannot be reused.

[0005] Therefore, it is necessary to design a detachable rubber sealing cover for a steering gear, which can cooperate with the corresponding housing hole to achieve a sealing function without the need for additional sealing rings or screws, and can be repeatedly disassembled and re-used. Summary of the invention

[0006] The utility model aims to overcome the deficiencies of the prior art and provides a detachable rubber sealing cover for a steering gear, which can cooperate with the corresponding housing hole to achieve a sealing function without the need for additional sealing rings or screws, and can be repeatedly disassembled and used.

[0007] In order to achieve the above-mentioned purpose, the utility model is a detachable rubber sealing cover for a steering gear, comprising a metal frame and rubber. The metal frame is coated with rubber, a plurality of sealing lips are arranged on the periphery of the rubber, a column protruding upward is arranged at the center of the top of the rubber, a flange protruding outward is arranged at the top edge of the rubber, and a plurality of convex points are evenly arranged on the bottom of the rubber.

[0008] The metal frame is an integrated structure consisting of a top surface and side surfaces.

[0009] The outer surface and the inner surface edge of the top surface, and the inner surface and the outer surface of the side surface are all covered with rubber.

[0010] The top surface is provided with a plurality of through holes, and the lower end of the column is embedded in the through hole located in the center of the top surface.

[0011] After the rubber is inserted into the inner hole of the shell, the sealing lip and the inner hole wall are interference fit, the flange is inserted into the annular groove on the inner hole surface, the upper end surface of the flange fits with the top surface of the annular groove, and the convex point abuts against the bottom surface of the inner hole.

[0012] There are three sealing lips.

[0013] There are eight convex points.

[0014] Compared with the prior art, the utility model is designed with a sealing lip matched with the inner hole wall of the shell, which increases the effective sealing area and ensures the sealing function; the flange matched with the ring groove of the shell is designed to achieve the limit and anti-drop function, and the disassembly and assembly are convenient; the setting of the column is convenient for the disassembly and rework of the sealing cover, and the sealing cover can be disassembled and assembled repeatedly. The utility model has the advantages of low cost and wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a cross-sectional view of the utility model.

[0017] Figure 3 It is a cross-sectional view of the utility model used in conjunction with a housing. DETAILED DESCRIPTION

[0018] The utility model is now further described with reference to the accompanying drawings.

[0019] See also Figure 1 , Figure 2 The utility model is a detachable rubber sealing cover for a steering gear, comprising a metal frame and rubber. The metal frame 2 is covered with rubber 1, so that the sealing cover has a certain strength. A plurality of sealing lips 11 are arranged on the periphery of the rubber 1, and a column 14 protruding upward is arranged at the top center of the rubber 1. The column 14 serves to facilitate the disassembly and rework of the sealing cover. A flange 12 protruding outward is arranged at the top edge of the rubber 1, and a plurality of convex points 13 are evenly arranged at the bottom of the rubber 1.

[0020] The metal frame 2 is an integrated structure consisting of a top surface and a side surface, and is in an inverted bowl-shaped structure. The outer surface and the inner surface edge of the top surface, and the inner surface and the outer surface of the side surface are all covered with rubber 1.

[0021] The top surface is provided with a plurality of through holes 21 for positioning the metal frame 2 when the rubber 1 is formed. The lower end of the column 14 is embedded in the through hole 21 located in the center of the top surface, which increases the bonding force between the column 14 and the metal frame 2, so that the rubber will not peel off when the sealing cover is pulled out.

[0022] Preferably, there are three sealing lips 11 and eight protrusions 13.

[0023] See also Figure 3 When the utility model is working, after the rubber 1 is inserted into the inner hole of the shell 3, the sealing lip 11 and the inner hole wall 31 are interference fit, and the sealing lip 11 is deformed to form a reliable sealing area to achieve the sealing function. The flange 12 is inserted into the annular groove 32 on the surface of the inner hole. The flange 12 is deformed when installed, and is stuck in the annular groove 32 after rebounding, thereby achieving the limiting and anti-slip functions. The upper end surface of the flange 12 fits with the top surface of the annular groove 32, preventing external foreign matter or liquid from flowing into the annular groove 32, further improving the sealing performance. The convex point 13 is against the bottom surface 33 of the inner hole. After the convex point 13 is compressed and deformed, it provides axial preload force to prevent the sealing cover from axial movement.

[0024] When installing the utility model, a clamp of appropriate size is used to press the upper end surface of the flange 12 and press it down to the inside of the housing 3. When the flange 12 is deformed and rebounds into the annular groove 32, it is installed in place.

[0025] During disassembly of the utility model, since the edges and corners of the annular groove 32 are all rounded, the sealing cover can be removed by pulling the upright column 14 outwards without scratching the rubber 1 .

[0026] The utility model is designed with a sealing lip that matches the inner hole wall of the shell, thereby increasing the effective sealing area and ensuring the sealing function; a flange that matches the ring groove of the shell is designed to achieve the limit and anti-drop functions, and is convenient for disassembly and assembly; the setting of the column facilitates the disassembly and rework of the sealing cover, and can be repeatedly disassembled and assembled. The utility model has the advantages of low cost and wide applicability.

Claims

1. A detachable rubber sealing cover for a steering gear, comprising a metal frame and rubber, characterized in that: The metal frame (2) is covered with rubber (1), a plurality of sealing lips (11) are provided on the periphery of the rubber (1), a column (14) protruding upward is provided at the center of the top of the rubber (1), a flange (12) protruding outward is provided at the top edge of the rubber (1), and a plurality of protrusions (13) are evenly arranged at the bottom of the rubber (1).

2. A detachable rubber sealing cover for a steering gear according to claim 1, characterized in that: The metal frame (2) is an integrated structure consisting of a top surface and side surfaces.

3. A detachable rubber sealing cover for a steering gear according to claim 2, characterized in that: The outer surface and the inner surface edge of the top surface, and the inner surface and the outer surface of the side surface are all covered with rubber (1).

4. A detachable rubber sealing cover for a steering gear according to claim 2, characterized in that: The top surface is provided with a plurality of through holes (21), and the lower end of the column (14) is embedded in the through hole (21) located in the center of the top surface.

5. The detachable rubber sealing cover for a steering gear according to claim 1, characterized in that: After the rubber (1) is inserted into the inner hole of the housing (3), the sealing lip (11) is interference-fitted with the inner hole wall (31), the flange (12) is inserted into the annular groove (32) on the surface of the inner hole, the upper end surface of the flange (12) is in contact with the top surface of the annular groove (32), and the convex point (13) is against the bottom surface (33) of the inner hole.

6. A detachable rubber sealing cover for a steering gear according to claim 1, characterized in that: There are three sealing lips (11).

7. A detachable rubber sealing cover for a steering gear according to claim 1, characterized in that: There are eight protrusions (13).

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