A high-lip combination oil seal assembly

Abstract

The utility model relates to a kind of high-lip combination oil seal assembly structure, including assembly tool, high-lip combination oil seal and workpiece, the workpiece is equipped with installation port, the high-lip combination oil seal includes cylindrical installation part and inverted trapezoidal oil seal mouth, recessed ring is formed between the cylindrical installation part and inverted trapezoidal oil seal mouth, the assembly tool includes guide pressure head, spacer and pressure sleeve, two pressure sleeves mutually embrace at recessed ring, the spacer is buckled on pressure sleeve upper portion, the guide pressure head is pressed on spacer, by the knocking of guide pressure head, so that the cylindrical installation part of high-lip combination oil seal is inserted into the installation port on workpiece.The utility model provides uniform radial clamping force, effectively avoids the extrusion, distortion or permanent deformation caused by traditional tool, fundamentally protects the body structure of oil seal.Simultaneously, the utility model integrates guide, clamping, press-fitting function in a set of tool, compact structure, easy to operate, significantly improve assembly efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of sealing component assembly structure, and particularly relates to a high-lip combined oil seal assembly structure. Background Technology

[0002] High-lip combination oil seals are precision components widely used in the field of mechanical seals to achieve efficient sealing of rotating or reciprocating shafts. These oil seals are commonly used in heavy machinery, automotive engines, transmissions, and other equipment, requiring excellent sealing performance and durability under high pressure, high temperature, and high speed conditions.

[0003] In traditional assembly processes, high-lip combination oil seals are typically installed into the mounting opening of the workpiece by direct pressing or hammering. Due to their complex structure and the soft, easily deformable lip, uneven force or inaccurate guidance during installation can easily lead to lip flipping, twisting, or localized damage, thereby affecting the sealing effect or even causing premature oil seal failure.

[0004] While some specialized oil seal installation tools exist in the prior art, such as simple compression sleeves or guide rings, their structures are generally quite simple and cannot effectively adapt to the complex shape of high-lip combination oil seals. Especially during installation, misalignment or deformation can easily occur during pressing. Furthermore, uneven force transmission during installation may result in the oil seal not being fully in place or causing localized stress concentration, further affecting its sealing performance and service life.

[0005] Therefore, there is an urgent need for an assembly structure that is reasonable, easy to operate, and can effectively protect the shape of the oil seal, so as to ensure that the high-lip combined oil seal maintains its integrity and positioning accuracy during installation, thereby improving the assembly quality and sealing reliability. Utility Model Content

[0006] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a high-lip combined oil seal assembly structure, which is easy to operate and can effectively protect the high-lip combined oil seal.

[0007] To achieve the above-mentioned objectives, this utility model adopts the following technical solution:

[0008] A high-lip combined oil seal assembly structure includes an assembly fixture, a high-lip combined oil seal, and a workpiece. The workpiece has an installation port. The high-lip combined oil seal includes a columnar mounting portion and an inverted trapezoidal oil seal opening, forming a concave ring between the columnar mounting portion and the inverted trapezoidal oil seal opening. The assembly fixture includes a guide head, a spacer, and a pressure sleeve. The two pressure sleeves interlock at the concave ring. The spacer is fastened to the upper part of the pressure sleeve. The guide head presses against the spacer. By striking the guide head, the columnar mounting portion of the high-lip combined oil seal is inserted into the installation port on the workpiece.

[0009] As a preferred embodiment, the guide head includes a guide post and a convex ring disposed on the outer side wall of the middle part of the guide post. The spacer has a through hole, the guide post is inserted into the through hole, and the convex ring presses against the upper end face of the spacer.

[0010] As a preferred embodiment, the upper end of the pressure sleeve is provided with an upper protrusion, the upper protrusion and the pressure sleeve body form an outer stepped surface, and the lower end of the spacer abuts against the outer stepped surface.

[0011] As a preferred embodiment, the through holes in the spacer are stepped, forming an inner stepped surface inside the spacer, with a gap between the top of the upper protrusion and the inner stepped surface.

[0012] As a preferred embodiment, the lower inner wall of the pressure sleeve is provided with a wedge-shaped inner protrusion, which is engaged in the concave ring of the high-lip combined oil seal.

[0013] As a preferred embodiment, the outer diameters of the spacer and the pressure sleeve are the same, and a gap is left between the upper end of the high-lip combined oil seal and the pressure sleeve.

[0014] As a preferred embodiment, the top of the outer wall of the columnar mounting portion of the high-lip combined oil seal extends outward to form an outer protrusion, and the lower end face of the pressure sleeve presses the outer protrusion against the end face of the mounting port of the workpiece.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention provides uniform radial clamping force by having two clamping sleeves interlock at the concave ring of the high-lip oil seal. This effectively avoids the squeezing, twisting, or permanent deformation that can occur when traditional tools clamp onto the oil seal lip or mounting part, fundamentally protecting the oil seal's structure. Furthermore, this invention integrates guiding, clamping, and pressing functions into a single tooling unit, resulting in a compact structure and simple operation (requiring only tapping). This significantly improves assembly efficiency and is particularly suitable for batch operations on production lines.

[0017] This invention optimizes the force transmission path, constructing a clear and stable force transmission path where the force is sequentially transmitted to the spacer and pressure sleeve by the tapping guide head, and finally applied to the vicinity of the oil seal concave ring. This structure ensures that the installation force acts directly and vertically on the structural part of the oil seal most suitable for bearing pressure (the end of the columnar mounting part 41), preventing bending moments caused by improper force application during installation, which could lead to oil seal tilting or jamming. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0019] Figure 1This is a structural schematic diagram of the guide head, spacer, pressure sleeve, high-lip combined oil seal, and workpiece of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the present invention, in which the pressure sleeve is fastened to the outside of the high lip combined oil seal, the spacer is sleeved on the pressure sleeve, and the high lip combined oil seal is placed at the workpiece mounting port.

[0021] Figure 3 This is a schematic diagram of the assembly tooling of this utility model for installing a high-lip combined oil seal into a workpiece.

[0022] Figure 4 This is a schematic diagram of the structure of the high-lip combined oil seal and the workpiece after installation.

[0023] The reference numerals in the accompanying drawings are as follows: 1. Guide head; 11. Guide post; 12. Protruding ring; 2. Spacer; 21. Through hole; 22. Inner stepped surface; 3. Pressure sleeve; 31. Upper protrusion; 32. Wedge-shaped inner protrusion; 4. High lip combined oil seal; 41. Columnar mounting part; 42. Concave ring; 43. Inverted trapezoidal oil seal opening; 5. Workpiece. Detailed Implementation

[0024] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," 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.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0031] like Figures 1 to 4 The high-lip combined oil seal assembly structure shown includes an assembly fixture, a high-lip combined oil seal 4, and a workpiece 5. The workpiece 5 has an installation port. The high-lip combined oil seal 4 includes a columnar mounting portion 41 and an inverted trapezoidal oil seal opening 43. A concave ring 42 is formed between the columnar mounting portion 41 and the inverted trapezoidal oil seal opening 43. The assembly fixture includes a guide pressure head 1, a spacer 2, and a pressure sleeve 3. The two pressure sleeves 3 are engaged with each other at the concave ring 42. The spacer 2 is fastened to the upper part of the pressure sleeve 3. The guide pressure head 1 presses against the spacer 2. By striking the guide pressure head 1, the columnar mounting portion 41 of the high-lip combined oil seal 4 is inserted into the installation port on the workpiece 5.

[0032] The aforementioned assembly fixture integrates a guiding function. The cooperation between the guide head and the spacer, as well as the alignment of the entire assembly fixture with the workpiece mounting port, ensures that the high-lip combined oil seal can be smoothly pressed into the mounting port at the correct angle and position, greatly improving the coaxiality of the assembly and the success rate of the first attempt.

[0033] The guide pressure head 1 includes a guide post 11 and a convex ring 12 disposed on the outer side wall of the middle part of the guide post 11. The spacer 2 has a through hole 21, into which the guide post 11 is inserted, and the convex ring 12 presses against the upper end face of the spacer. The fit between the convex ring and the upper end face of the spacer ensures that the guide pressure head has a defined axial installation position. This prevents the guide pressure head from being over-inserted into the through hole of the spacer during the hammering process, ensuring that the starting point of force transmission is always consistent, and improving the repeatability and stability of the operation. Simultaneously, the fit between the guide post and the through hole extends the contact surface of the guide, making it less prone to tilting when under force, further ensuring the verticality of the pressing force, allowing the oil seal to be inserted straight into place.

[0034] The upper end of the pressure sleeve 3 is provided with an upper protrusion 31, which forms an outer stepped surface with the pressure sleeve body. The lower end of the spacer 2 abuts against the outer stepped surface. By abutting the lower end of the spacer with the outer stepped surface, a clear and reliable axial force transmission interface is formed. The force of the spacer can be evenly distributed on the entire annular end face of the pressure sleeve, avoiding stress concentration and preventing radial movement or deformation of the pressure sleeve under force, thus ensuring clamping stability.

[0035] The through-hole in the spacer 2 is stepped, forming an inner stepped surface 22 within the spacer 2. A gap is left between the top of the upper protrusion 31 and the inner stepped surface 22. During the pressing stage, the pressure sleeve 3 and the oil seal 4 move as a whole, and this gap provides buffer protection.

[0036] The lower inner wall of the pressure sleeve 3 is provided with a wedge-shaped inner protrusion 32, which is engaged within the concave ring 42 of the high-lip combined oil seal 4. When the pressure sleeve 3 is subjected to a downward pressing force, the wedge-shaped inclined surface generates an inward component force, allowing the two semi-annular pressure sleeves 3 to more tightly grip the concave ring 42 of the oil seal, becoming increasingly tighter with each press, effectively preventing the oil seal from detaching from the tooling during the pressing process. Simultaneously, compared to a right-angled boss, the wedge-shaped structure has a larger contact area with the concave ring 42 and can better disperse concentrated stress, avoiding damage to the oil seal material, especially on elastomer materials such as rubber or polyurethane.

[0037] The spacer 2 and the pressure sleeve 3 have the same outer diameter, and a gap is left between the upper end of the high-lip combined oil seal 4 and the pressure sleeve 3. The above-mentioned gap design ensures that the pressing force is completely borne by the wedge-shaped inner protrusion 32 of the concave ring 42, and then transmitted to the upper end face of the columnar mounting part 41 of the oil seal, protecting the most important inverted trapezoidal oil seal opening 43 from any squeezing damage during installation.

[0038] The top of the outer wall of the columnar mounting portion 41 of the high-lip combined oil seal 4 extends outward to form an outer protruding edge. The lower end face of the pressure sleeve 3 presses the outer protruding edge against the end face of the mounting port of the workpiece 5. The above structure ensures that the columnar mounting portion 41 of the oil seal is fully inserted into the mounting port to the bottom, and the installation depth meets the design requirements. At the same time, the outer protruding edge is pressed against the surface of the workpiece, which can form an additional static sealing ring, enhancing the overall sealing effect and preventing oil leakage from the mounting joint surface.

[0039] In use, this invention involves first installing two pressure sleeves from the side of the combined oil seal at the junction of the columnar mounting portion 41 and the inverted trapezoidal oil seal opening 43 of the high-lip combined oil seal, so that the wedge-shaped inner protrusion 32 of the pressure sleeve is engaged with the concave ring. Then, a spacer is placed on the pressure sleeve, the purpose of which is to merge the two pressure sleeves into one, ensuring that the force-bearing surface of the oil seal is the columnar mounting portion 41, and the groove of the pressure sleeve protects the oil seal lip from pressure. Next, a guide pressure head is inserted into the spacer and the pressure sleeve, so that the convex ring presses against the spacer, and the guide pressure head 1 is struck to press the oil seal onto the workpiece. This ensures that the lip of the combined oil seal is not damaged during pressing and also improves the efficiency of this type of oil seal during assembly.

[0040] The structure of this invention effectively protects the lip of the oil seal during assembly, preventing damage. Simultaneously, by optimizing the tooling design, assembly efficiency is improved, meeting the needs of large-scale production.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A high-lip combined oil packaging structure, characterized in that: The assembly includes an assembly fixture, a high-lip combined oil seal (4), and a workpiece (5). The workpiece (5) has an installation port. The high-lip combined oil seal (4) includes a columnar mounting part (41) and an inverted trapezoidal oil seal opening (43). A concave ring (42) is formed between the columnar mounting part (41) and the inverted trapezoidal oil seal opening (43). The assembly fixture includes a guide pressure head (1), a spacer (2), and a pressure sleeve (3). The two pressure sleeves (3) are engaged with each other at the concave ring (42). The spacer (2) is fastened to the upper part of the pressure sleeve (3). The guide pressure head (1) presses against the spacer (2). By striking the guide pressure head (1), the columnar mounting part (41) of the high-lip combined oil seal (4) is inserted into the installation port on the workpiece (5).

2. The high lip combination oil seal assembly of claim 1, wherein, The guide pressure head (1) includes a guide post (11) and a convex ring (12) disposed on the outer side wall of the middle part of the guide post (11). The spacer (2) has a through hole (21), the guide post (11) is inserted into the through hole (21), and the convex ring (12) presses against the upper end face of the spacer.

3. The high lip combination oil seal assembly of claim 1, wherein: The upper end of the pressure sleeve (3) is provided with an upper protrusion (31), the upper protrusion (31) and the pressure sleeve body form an outer stepped surface, and the lower end of the spacer (2) abuts against the outer stepped surface.

4. The high lip combination oil seal assembly of claim 1, wherein, The through hole in the spacer (2) is stepped, and an inner step surface (22) is formed inside the spacer (2), with a gap between the top of the upper protrusion (31) and the inner step surface (22).

5. The high-lip combined oil packaging assembly structure according to claim 1, characterized in that, The lower inner wall of the pressure sleeve (3) is provided with a wedge-shaped inner protrusion (32), which is engaged in the concave ring (42) of the high lip combined oil seal (4).

6. The high-lip combined oil packaging assembly structure according to claim 1, characterized in that, The outer diameters of the spacer (2) and the pressure sleeve (3) are the same, and there is a gap between the upper end of the high lip combined oil seal (4) and the pressure sleeve (3).

7. The high lip combination oil seal assembly of claim 1, wherein, The top of the outer side wall of the columnar mounting part (41) of the high-lip combined oil seal (4) extends outward to form an outer protrusion, and the lower end face of the pressure sleeve (3) presses the outer protrusion onto the end face of the mounting port of the workpiece (5).

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