A locally glued automatic transmission separator gasket

Abstract

The utility model provides a kind of automatic gearbox partition pad of local gluing, it is related to the technical field of automobile automatic gearbox, including metal substrate, the upper surface of metal substrate, in the area corresponding to key sealing path, etching has three-dimensional groove network, the lower surface of metal substrate, in the local area consolidation with microcapsule function layer corresponding to the three-dimensional groove network;The utility model will traditional "gluing before assembly" process be converted into the intelligent structure of pad "internal solidification", realizes the quantitative storage of sealing glue, positioning distribution and on-demand triggering by microcapsule function layer;Through three-dimensional groove network, the ordered guidance and accurate forming of colloid are realized, and the design completely eliminates the process uncertainty of external gluing, avoids assembly pollution, significantly improves the consistency and reliability of sealing.

Description

Technical Field

[0001] This utility model relates to the field of automotive automatic transmission technology, and in particular to an automatic transmission partition gasket with partial adhesive coating. Background Technology

[0002] Automatic transmissions have a precise internal structure, and the sealing between components such as valve bodies, partitions, and housings is crucial. Currently, there are two main types of gaskets commonly used: one is a monolithic solid gasket (such as a metal composite gasket or a rubber gasket), and the other is a gasket in which liquid sealant (such as room temperature vulcanizing silicone rubber) is applied to the mating surfaces or the entire gasket before assembly. Monolithic solid gaskets have extremely high requirements for the flatness and roughness of the mating surfaces, and are prone to creep relaxation under long-term high temperatures, oil immersion, and pressure cycling, leading to seal failure. On the other hand, the process of applying liquid sealant has several shortcomings: first, it is difficult to precisely control the amount and uniformity of the sealant, which can easily result in localized insufficient sealant or overflow; second, uncured sealant can easily shift or contaminate adjacent precision oil passages and valve cores during assembly; and third, during maintenance and disassembly, the cured sealant layer can easily cause the gasket to tear, and residues are difficult to clean, resulting in poor maintainability. Therefore, we propose a partially sealant-applied automatic transmission partition gasket. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies. One type is the integral solid gasket (such as a metal composite gasket or a rubber gasket), and the other is a gasket in which liquid sealant (such as room temperature vulcanizing silicone rubber) is applied to the mating surface or the entire gasket before assembly. Integral solid gaskets have extremely high requirements for the flatness and roughness of the mating surface, and are prone to creep relaxation under long-term high temperature, oil immersion, and pressure cycling, leading to sealing failure. On the other hand, the process of integrally applying liquid sealant has many drawbacks: first, it is difficult to accurately control the amount and uniformity of the sealant, which can easily lead to localized insufficient sealant or overflow; second, the uncured sealant can easily shift or contaminate adjacent precision oil passages and valve cores during assembly; and third, during maintenance and disassembly, the cured sealant layer can easily cause the gasket to tear, and the residue is difficult to clean, resulting in poor maintainability.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An automatic transmission partition gasket with localized adhesive coating includes a metal substrate, wherein a three-dimensional trench network is etched on the upper surface of the metal substrate in a region corresponding to a critical sealing path, and a microcapsule functional layer is solidified on the lower surface of the metal substrate in a localized region corresponding to the three-dimensional trench network.

[0006] Furthermore, the metal substrate has bolt holes, oil passage holes, and shift valve holes corresponding to the gearbox partition and housing, and its overall shape is an irregular polygon.

[0007] Furthermore, the three-dimensional trench network includes a main directional trench and a flow-limiting capillary trench; the main directional trench is a continuous, closed annular groove, which is arranged to closely surround the oil passage holes, water passage holes and connecting key bolt holes on the metal substrate; the flow-limiting capillary trench is a mesh or radial shallow texture extending from the main directional trench to the sealing surfaces on both sides.

[0008] Furthermore, the microcapsule functional layer is composed of multiple independent microcapsule patches, each of which corresponds to an independent key sealing area. The microcapsule patches are fixed to the lower surface of the metal substrate by an adhesive, and sealant microcapsules are uniformly dispersed inside them.

[0009] Furthermore, the metal substrate has a non-uniform thickness elastic variable cross-section structure. In the critical sealing area where the three-dimensional groove network and the corresponding microcapsule functional layer are provided, the thickness of the metal substrate is designed to have a low elastic modulus. In the non-critical sealing area without the above structure, the rigidity of the metal substrate is high.

[0010] Furthermore, the surfaces of the upper surface region where the three-dimensional groove network is located, and the lower surface region where the microcapsule functional layer is located, are both treated with an oleophobic coating.

[0011] Furthermore, the sealant microcapsules contained in the microcapsule functional layer contain thermosetting sealant.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention transforms the traditional "pre-assembly gluing" process into an intelligent structure for "internal curing" of the gasket. Through a microcapsule functional layer, it achieves quantitative storage, precise distribution, and on-demand triggering of the sealant. A three-dimensional groove network enables orderly guidance and precise molding of the sealant. This design completely eliminates the uncertainties of external gluing, avoids assembly contamination, and significantly improves the consistency and reliability of the seal. Simultaneously, the asymmetric elastic substrate design enhances the gasket's adaptability to various operating conditions. During maintenance, because the sealant is effectively constrained within the groove network, the gasket can be peeled off relatively completely, improving maintainability. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of a partially glued automatic transmission partition gasket provided by this utility model;

[0015] Figure 2 A schematic diagram of the bottom structure of a partially glued automatic transmission partition gasket provided by this utility model;

[0016] Figure 3 A schematic diagram of the internal structure of a microcapsule patch for a partially adhesive automatic transmission partition gasket provided by this utility model.

[0017] Legend: 1. Metal substrate; 101. Three-dimensional trench network; 102. Microcapsule functional layer; 103. Main directional trench; 104. Flow-limiting capillary trench; 105. Oil channel hole; 106. Bolt hole; 107. Microcapsule patch; 108. Sealant microcapsule. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0021] Unless otherwise defined, 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Example 1

[0023] like Figure 1-3As shown, this utility model provides a technical solution: a partially coated automatic transmission partition gasket, including a metal substrate 1. The upper surface of the metal substrate 1 has a three-dimensional groove network 101 etched in the region corresponding to the critical sealing path. The lower surface of the metal substrate 1 has a microcapsule functional layer 102 solidified in a local region corresponding to the three-dimensional groove network 101. Liquid sealant released from the microcapsule functional layer 102 is first squeezed into the main guide groove 103 of the three-dimensional groove network 101 under the action of bolt tightening force, quickly filling the entire critical sealing loop. Subsequently, under capillary action, the sealant slowly and evenly penetrates to the sealing surfaces on both sides along the flow-limiting capillary groove 104, forming a "sealing dam" composed of dense adhesive lines (main grooves) and a uniformly transitioned adhesive film (capillary region).

[0024] Example 2

[0025] like Figure 1-3 As shown, the metal substrate 1 has bolt holes 106, oil passage holes 105, and shift valve holes corresponding to the gearbox partition and housing. Its overall shape is an irregular polygon. The three-dimensional groove network 101 includes a main directional groove 103 and a flow-limiting capillary groove 104. The main directional groove 103 is a continuous, closed annular groove, which is arranged to closely surround the oil passage holes 105, water passage holes, and key bolt holes 106 on the metal substrate 1. The flow-limiting capillary groove 104 is a mesh or radial shallow texture extending from the main directional groove 103 to the sealing surfaces on both sides. The main directional groove 103 constitutes the main channel for the flow of sealant, ensuring that the sealant can quickly fill the entire high-pressure sealing loop. The flow-limiting capillary groove uses capillary action to allow the sealant to slowly and evenly penetrate into the sealing surface to form a dense sealant film. At the same time, its shallow depth design can effectively prevent excessive overflow of sealant and contamination of the interior.

[0026] The microcapsule functional layer 102 is composed of multiple independent microcapsule patches 107, each microcapsule patch 107 corresponding to an independent key sealing area. The thickness of the microcapsule patch 107 is 0.05-0.15mm. The microcapsule patch 107 is fixed to the lower surface of the metal substrate 1 by an adhesive. The sealant microcapsules 108 are uniformly dispersed inside. The breaking strength of the microcapsule wall material is matched with the clamping force of the bolt design in the corresponding area.

[0027] The metal substrate 1 has a non-uniform thickness elastic cross-section structure. In the critical sealing area where the three-dimensional groove network 101 and the corresponding microcapsule functional layer 102 are provided, the thickness of the metal substrate 1 is designed to have a low elastic modulus. In the non-critical sealing area without the above structure, the rigidity of the metal substrate 1 is high. This asymmetric elastic design can optimize the pressure distribution during assembly, ensure that the critical sealing area receives sufficient compressive force to trigger the microcapsules and allow the colloid to fully fill the grooves, while the non-critical area provides stable structural support and clamping force retention, improving the gasket's adaptability to thermal deformation and vibration conditions.

[0028] The upper surface region where the three-dimensional groove network 101 is located, and the lower surface region where the microcapsule functional layer 102 is located, are both treated with oleophobic coating. The oleophobic coating can reduce the wetting and interference of the gearbox oil on the colloid in the groove and on the surface of the microcapsule layer, ensuring that the sealant maintains a stable morphology and adhesion performance in the working environment, and improving long-term sealing reliability. The sealant microcapsules 108 contained in the microcapsule functional layer 102 contain thermosetting sealant, and the predetermined burst pressure of the thermosetting sealant is 50 MPa.

[0029] The workflow of this utility model is as follows: When using a locally coated automatic transmission partition gasket, firstly, during assembly, the gasket is placed between the transmission partition and the housing, and the bolts are tightened to the specified torque. The clamping force generated by the bolts causes the microcapsules in the microcapsule functional layer 102 to rupture first at the pressure concentration point (around the bolt hole 106), releasing liquid sealant. Under pressure, the sealant enters the main guide groove 103 on the upper surface and quickly fills the loop. Subsequently, under capillary action, it spreads evenly along the flow-limiting capillary groove 104, ultimately forming a precise and continuous sealant line at the sealing interface. The anaerobic adhesive cures after being isolated from air at the metal interface. When maintenance is required, the bolts are loosened, and since the sealant is mainly cured in the grooves, the gasket can be removed relatively completely for easy cleaning and replacement.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A partially adhesive-coated automatic transmission partition gasket, comprising a metal substrate (1), characterized in that: On the upper surface of the metal substrate (1), a three-dimensional trench network (101) is etched in the region corresponding to the critical sealing path, and on the lower surface of the metal substrate (1), a microcapsule functional layer (102) is fixed in the local region corresponding to the three-dimensional trench network (101).

2. The automatic transmission partition gasket with partial adhesive coating according to claim 1, characterized in that: The metal substrate (1) has bolt holes (106), oil passage holes (105) and shift valve holes corresponding to the gearbox partition and housing, and its overall shape is an irregular polygon.

3. The automatic transmission partition gasket with partial adhesive coating according to claim 2, characterized in that: The three-dimensional groove network (101) includes a main directional groove (103) and a flow-limiting capillary groove (104); the main directional groove (103) is a continuous, closed annular groove, which is arranged to closely surround the oil passage hole (105), water passage hole and connecting key bolt hole (106) on the metal substrate (1); the flow-limiting capillary groove (104) is a mesh or radial shallow texture extending from the main directional groove (103) to the sealing surfaces on both sides.

4. The automatic transmission partition gasket with partial adhesive coating according to claim 1, characterized in that: The microcapsule functional layer (102) is composed of multiple independent microcapsule patches (107), each of which corresponds to an independent key sealing area. The microcapsule patches (107) are fixed to the lower surface of the metal substrate (1) by an adhesive, and sealant microcapsules (108) are uniformly dispersed inside them.

5. The automatic transmission partition gasket with partial adhesive coating according to claim 1, characterized in that: The metal substrate (1) is an elastic variable cross-section structure with non-uniform thickness. In the critical sealing area where the three-dimensional groove network (101) and the corresponding microcapsule functional layer (102) are provided, the thickness of the metal substrate (1) is designed to have a low elastic modulus. In the non-critical sealing area without the above structure, the rigidity of the metal substrate (1) is high.

6. The partially adhesive-coated automatic transmission partition gasket according to claim 1, characterized in that: The surfaces of the upper surface region where the three-dimensional groove network (101) is located and the lower surface region where the microcapsule functional layer (102) is located are both treated with oleophobic coating.

7. The automatic transmission partition gasket with partial adhesive coating according to claim 1, characterized in that: The sealant microcapsules (108) contained in the microcapsule functional layer (102) are thermosetting sealants.

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