New energy vehicle gearbox sealing cover plate

Abstract

The utility model discloses a new energy automobile gearbox sealing cover plate, including aluminium alloy base plate and rubber sealing element, and rubber sealing element is fixed in annular recess on aluminium alloy base plate top surface through cold runner mould integral vulcanization, is equipped with the microcosmic rough structure area formed through laser texturing treatment on the surface in annular recess, and has the special vulcanization adhesive layer on this rough structure area, rubber sealing element is arranged as the sealing tendon of cross section is similar trapezoidal. Thus, through laser texturing treatment + special adhesive + high temperature integral vulcanization triple combination mechanism, the combination strength between aluminium plate and rubber part has been strengthened, and the risk of falling off has been eliminated, adopts cold runner injection vulcanization technology, reduces the glue waste, improves production efficiency, and trapezoidal sealing tendon is more easily deformed to fit the docking surface, improves the air tightness and watertight performance, and the integrated molding structure simplifies the production process, eliminates the interface wear and tear and aging problem caused by micro motion, temperature difference.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a sealing cover for a new energy vehicle gearbox. Background Technology

[0002] In the existing structure of gearbox sealing cover (including aluminum alloy parts and rubber seals), aluminum alloy parts and rubber seals are usually connected and fixed by adhesive bonding or physical groove embedding. This traditional method has the following inherent defects: (1) Due to the significant differences in the linear expansion coefficient, elastic modulus and other physical properties of aluminum alloy and rubber, stress concentration is easily generated at the bonding interface under the action of ambient temperature change or mechanical vibration, which leads to aging and cracking of the adhesive layer, and eventually causes the seal to fall off; (2) Whether it is adhesive bonding or embedding, it is difficult to ensure the uniform pressure distribution at the sealing interface (especially between the sealing rib and the mating flange surface), which is prone to leakage channels due to assembly deviation, resulting in substandard air tightness or water tightness; (3) The traditional multi-step assembly process is inefficient, relies on manual operation, and it is difficult to guarantee the consistency of quality. In addition, the auxiliary materials used (such as adhesives) may also introduce new aging risks.

[0003] Therefore, in order to solve the problem that the connection method in the existing technology not only has insufficient sealing reliability, but also greatly reduces the overall service life of the sealing cover, a new type of sealing cover structure is urgently needed. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a sealing cover for a new energy vehicle gearbox.

[0005] This utility model proposes a sealing cover for a new energy vehicle gearbox, comprising an aluminum alloy substrate and a rubber seal. The rubber seal is integrally vulcanized and fixed in an annular groove on the top surface of the aluminum alloy substrate by a cold runner mold. The surface of the annular groove is provided with a micro-rough structure area formed by laser texturing, and a special vulcanized adhesive layer is coated on the rough structure area. The rubber seal is configured as a sealing rib with a trapezoidal cross-section.

[0006] Preferably, the sealing rib has inclined sidewalls on both sides and two smooth ribs on the top, with the top surface of the smooth ribs being an upwardly convex arc surface.

[0007] Preferably, the aluminum alloy substrate has a positioning recess for cooperating with the negative pressure adsorption device of the cold runner mold.

[0008] Preferably, the positioning recess is disposed on the non-sealed functional surface of the aluminum alloy substrate.

[0009] Preferably, the material of the rubber seal is an oil-resistant rubber with added nano-reinforcing fillers and anti-aging additives.

[0010] Preferably, a portion of the rubber sealant is coated with and embedded in the edge of the annular groove to form a mechanical fixation.

[0011] In summary, this invention offers the following advantages: Through a triple-combination mechanism of laser texturing, specialized adhesive, and high-temperature integrated vulcanization, it achieves an interfacial bonding strength between the aluminum alloy substrate and the rubber sealant that far exceeds that of traditional adhesives, fundamentally eliminating the risk of detachment. The cold runner injection vulcanization process reduces material waste and improves production efficiency. The integrated trapezoidal cross-section sealing rib forms a uniform sealing line under pressure, and its trapezoidal design makes it easier to deform and conform to the mating surface, exhibiting high tolerance for unevenness and achieving a qualitative leap in airtightness and watertightness. The integrated molding eliminates subsequent assembly processes, simplifying the production flow. The robust integrated structure eliminates interfacial wear and aging problems caused by fretting and temperature differences. The optimized rubber formulation and uniform vulcanization process ensure the product's performance stability throughout its entire lifespan, significantly extending its service life.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] Figure 1 This is a perspective view of the sealing cover plate of the new energy vehicle gearbox according to an embodiment of the present utility model;

[0014] Figure 2 This is a cross-sectional view of the sealing rib in an embodiment of the present utility model;

[0015] Figure 3 This is a schematic diagram of a partial structure of the sealing cover plate in an embodiment of the present invention, where the sealing ribs are concealed.

[0016] In the picture:

[0017] 1. Aluminum alloy substrate; 11. Annular groove; 2. Rubber seal; 21. Smooth rib. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] like Figure 1-3As shown, the new energy vehicle gearbox sealing cover proposed in this embodiment includes an aluminum alloy substrate 1 and a rubber seal 2. The rubber seal 2 is integrally vulcanized and fixed in an annular groove 11 on the top surface of the aluminum alloy substrate 1 by cold runner mold. The surface of the annular groove 11 is provided with a micro-rough structure area formed by laser texturing, and a special vulcanized adhesive layer is covered on the rough structure area. The rubber seal 2 is set as a sealing rib with a trapezoidal cross section.

[0020] Specifically, the roughened structure region consists of uniformly distributed micropits and protrusions etched by laser on the surface of the aluminum alloy substrate 1, which significantly increases the bonding area and provides mechanically interlocking anchor points for the subsequent rubber vulcanization flow. At the same time, the vulcanizing adhesive layer can chemically react with the rubber and the treated aluminum alloy substrate 1 surface during the vulcanization process to form a strong chemical bond.

[0021] Thus, through a triple-combination mechanism of laser texturing, specialized adhesive, and high-temperature integrated vulcanization, an interfacial bonding strength far exceeding that of traditional adhesives is achieved between the aluminum alloy substrate 1 and the rubber seal 2, fundamentally eliminating the risk of detachment. The cold runner injection vulcanization process reduces material waste and improves production efficiency. The one-piece trapezoidal cross-section sealing rib forms two independent and uniform sealing lines under pressure. The trapezoidal design makes it easier to deform and conform to the mating surface, exhibiting high tolerance for unevenness and achieving a qualitative leap in airtightness and watertightness. The one-piece molding eliminates subsequent assembly processes, simplifying the production flow. The robust integrated structure eliminates interfacial wear and aging problems caused by fretting and temperature differences. The optimized rubber formulation and uniform vulcanization process ensure the product's performance stability throughout its entire lifespan, significantly extending its service life.

[0022] Furthermore, the sealing rib has inclined sidewalls on both sides and two smooth ribs 21 on the top. The top surface of the smooth ribs 21 is an upwardly convex arc surface (avoiding stress concentration at sharp corners). When this sealing structure is tightened onto the mating flange surface of the gearbox housing by bolts, the trapezoidal sealing rib is compressed. Due to its trapezoidal design, the top arc contacts the rib initially under pressure. As the pressure increases, the contact area gradually increases, forming a sealing band of moderate width. This progressive contact method can more effectively fill the micro-unevenness of the flange surface, achieving a more reliable double seal. It has better following and resilience than traditional rectangular cross-section sealing ribs and can more effectively compensate for the unevenness of the mounting surface.

[0023] Furthermore, the aluminum alloy substrate 1 is provided with positioning recesses for cooperation with the negative pressure adsorption device of the cold runner mold. The positioning recesses are located on the non-sealing functional surface of the aluminum alloy substrate 1. After mold opening, a robot or transfer device can directly adsorb into these positioning recesses through negative pressure, firmly and smoothly picking up the product, realizing the precise positioning and non-destructive transfer of the sealing cover. This avoids the pinch marks or scratches caused by traditional mechanical grippers to the edges or upper surface of the aluminum alloy substrate 1, and is particularly suitable for products with high surface quality requirements.

[0024] In this embodiment, the material of the rubber seal 2 is set as oil-resistant rubber with added nano-reinforcing fillers and anti-aging additives, so as to further improve its mechanical properties and resistance to environmental aging.

[0025] The rubber seal 2 partially covers and embeds into the edge of the annular groove 11 to form a mechanical fixation.

[0026] The integral vulcanization molding process is as follows:

[0027] First, the aluminum alloy substrate 1 is formed into the required shape through a stamping process, serving as the skeleton and mounting base of the entire structure. In the annular groove 11 where it needs to be bonded to the rubber, it is pre-textured using laser surface treatment technology to form a micro-rough structure area. This area is not simply roughened, but rather formed by scanning a high-energy laser beam according to a predetermined pattern, resulting in uniformly distributed, depth-controllable micron-level pits and protrusions, which greatly increases the surface area and forms a micro-mechanical locking structure similar to a "dovetail groove".

[0028] Then, a thin and uniform layer of special vulcanizing adhesive is applied to the micro-rough structure area using a high-precision dispensing machine. This adhesive is usually a single-component or two-component system containing active ingredients such as isocyanate and silane coupling agent. It can be activated at the vulcanization temperature and form a strong chemical bond with the oxide layer on the aluminum surface and the rubber molecular chain.

[0029] Finally, the processed aluminum alloy substrate 1 is placed into a specially designed cold runner vulcanization mold. After the mold is closed, the unvulcanized rubber material is injected into the cavity through the cold runner system, filling and covering the pre-set sealing rib area on the aluminum alloy substrate 1. Under high temperature and high pressure vulcanization conditions, the rubber undergoes a cross-linking reaction and is tightly bonded to the micro-rough surface of the aluminum alloy substrate 1 through the adhesive layer, ultimately forming an inseparable integrated structure.

[0030] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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.

[0031] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sealing cover for a new energy vehicle gearbox, comprising an aluminum alloy substrate (1) and a rubber seal (2), characterized in that, The rubber seal (2) is integrally vulcanized and fixed in the annular groove (11) on the top surface of the aluminum alloy substrate (1) by cold runner mold. The surface of the annular groove (11) is provided with a micro-rough structure area formed by laser texturing, and a special vulcanized adhesive layer is covered on the rough structure area. The rubber seal (2) is a sealing rib with a trapezoidal cross-section.

2. The new energy vehicle gearbox sealing cover according to claim 1, characterized in that, The sealing rib has inclined sidewalls on both sides and two smooth ribs (21) on the top. The top surface of the smooth rib (21) is an upwardly convex arc surface.

3. The sealing cover for a new energy vehicle gearbox according to claim 1, characterized in that, The aluminum alloy substrate (1) has a positioning recess for cooperating with the negative pressure adsorption device of the cold runner mold.

4. The new energy vehicle gearbox sealing cover according to claim 3, characterized in that, The positioning recess is provided on the non-sealed functional surface of the aluminum alloy substrate (1).

5. The sealing cover for a new energy vehicle gearbox according to claim 1, characterized in that, The material of the rubber seal (2) is oil-resistant rubber with added nano-reinforcing filler and anti-aging additives.

6. The sealing cover for a new energy vehicle gearbox according to claim 1, characterized in that, The rubber seal (2) partially covers and embeds into the edge of the annular groove (11) to form a mechanical fixation.

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