Special-shaped oil pipe connecting structure in box body and vehicle

Abstract

The invention provides a special-shaped oil pipe connecting structure in a box body and a vehicle. The connecting structure comprises the box body, a preformed oil pipe and a fixing device. Lubricating oil is stored in the box body, and a first mounting hole and a second mounting hole are formed in the inner surface of the box body, are arranged in a non-coaxial mode and are used for oil outlet and oil return respectively. The preformed oil pipe at least comprises a first section and a second section, the free end of the first section is used for being in coaxial sealing fit with the first mounting hole and enabling the preformed oil pipe to rotate with the first mounting hole as the axis, and the free end of the second section is used for being in coaxial sealing fit with the second mounting hole after rotating; the fixing device penetrates through the middle of the preformed oil pipe, is connected with the box body and is used for limiting displacement of the preformed oil pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling and lubrication, and in particular to a special-shaped oil pipe connection structure in a box and a vehicle. Background Art

[0002] In automotive transmission systems, gearboxes like drive axles and transmissions require specialized lubrication systems to ensure adequate lubrication and cooling for key components like gears and bearings. These systems typically consist of a network of oil pipes built into the housing, delivering lubricant from an oil pump to the various locations requiring lubrication.

[0003] The current installation methods for lubricating oil pipes in gearboxes of automotive transmission systems mainly include: straight-in docking structure, spiral locking structure, flexible hose connection structure and segmented flange connection structure; among them, the straight-in structure requires precise alignment of the oil pipe and the axis of the housing mounting hole, while the spiral structure requires continuous thread processing on the outer wall of the pipe body and matching with special sealing gaskets. The flexible hose structure adapts to complex installation paths through manual bending, and the segmented structure uses multiple straight pipe sections connected by flanges to form a specific path.

[0004] However, these traditional oil pipe installation methods have revealed numerous drawbacks in highly integrated modern transmission systems. The plug-in connection requires extremely high hole machining precision, making it difficult to adapt to the multi-point lubrication needs within complex housings. The spiral connection has high machining costs and poses sealing reliability risks. The flexible hose connection is prone to leakage due to stress fatigue. The segmented flange connection not only increases assembly complexity, but also significantly increases system weight and leakage risk.

[0005] Based on the above defects, designing an in-box oil pipe structure that can adapt to the layout requirements of non-collinear mounting holes, simplify the assembly process, and provide sufficient sealing reliability has become a technical problem that urgently needs to be solved. Summary of the Invention

[0006] The invention discloses a special-shaped oil pipe connection structure in a box and a vehicle, aiming to solve the technical problems existing in the prior art.

[0007] The present invention adopts the following technical solutions:

[0008] On the one hand, an embodiment of the present invention provides a special-shaped oil pipe connection structure in a box body, comprising a box body, a preformed oil pipe and a fixing device;

[0009] Lubricating oil is stored in the box body, and a first mounting hole and a second mounting hole are provided on the inner surface of the box body, which are non-coaxially arranged and are used for oil outlet and oil return respectively;

[0010] The preformed oil pipe includes at least a first section and a second section. The free end of the first section is configured to coaxially seal with the first mounting hole and allow the preformed oil pipe to rotate about the first mounting hole. The free end of the second section is configured to coaxially seal with the second mounting hole after rotation.

[0011] The fixing device passes through the middle of the preformed oil pipe and is connected to the box body, and is used for limiting the displacement of the preformed oil pipe.

[0012] As a preferred technical solution, an annular sealing groove is provided at the free end of the first section and / or the second section, and a compressible sealing element is provided in the annular sealing groove.

[0013] As a preferred technical solution, the fixing device includes a bolt and a threaded hole matched with the box body, and the bolt is set through the middle of the preformed oil pipe;

[0014] The pre-tightening force of the bolt is configured to resist the axial vibration displacement of the oil pipe and inhibit the circumferential rotation tendency of the oil pipe.

[0015] As a preferred technical solution, a predetermined gap is provided between the middle portion of the preformed oil pipe and the inner surface of the box body, and the bolt is connected to the box body through the predetermined gap.

[0016] As a preferred technical solution, there is a first preset angle between the first section and the second section, and the first preset angle is not a straight angle.

[0017] As a preferred technical solution, the preformed oil pipe further includes a third section, which is arranged between the first section and the second section;

[0018] The first section and the second section are arranged in parallel, and are offset by a preset distance.

[0019] As a preferred technical solution, a second preset angle is provided between the first section and the third section, and a third preset angle is provided between the second section and the third section;

[0020] The second preset angle and the third preset angle are configured as a symmetrical structure or an asymmetrical structure, so as to match the position of the first mounting hole and / or the second mounting hole.

[0021] As a preferred technical solution, the third section is a straight structure.

[0022] As a preferred technical solution, the third section is configured as a non-straight bent or curved structure.

[0023] As a preferred technical solution, the preformed oil pipe is configured as an integrally formed metal pipe.

[0024] On the other hand, an embodiment of the present invention provides a vehicle, comprising the special-shaped oil pipe connection structure in a box body as described in any one of the above items.

[0025] One embodiment of the above invention has the following advantages or beneficial effects:

[0026] An embodiment of the present invention provides a special-shaped oil pipe connection structure in a box body and a vehicle. Compared with the prior art, the present invention arranges the preformed oil pipe in the box body as an integrated special-shaped, multi-segment structure, which can support a variety of special-shaped paths to meet the complex oil injection and lubrication routes in the box body. In addition, when installing the preformed oil pipe, it is adaptively matched with the two mounting holes by rotation. On the one hand, it can allow a certain position tolerance for the mounting holes, effectively solving the connection problem of non-coaxial mounting holes in the box body, eliminating the need to place excessively high requirements on the box body processing accuracy, and reducing manufacturing costs; on the other hand, the rotational alignment operation shortens the installation time, and the preformed oil pipe can be disassembled by reverse rotation, thereby improving assembly efficiency and maintenance convenience.

[0027] Because the preformed tubing is molded in one piece, it eliminates flanges and redundant fasteners, eliminating the multiple sealing points found in traditional segmented connection structures. This not only reduces the overall weight of the system but also significantly reduces the risk of leakage, enhancing system reliability. Furthermore, the annular sealing groove at the end, combined with the sealing element design, ensures a secure seal between the preformed tubing and the two mounting holes.

[0028] Furthermore, the design of the fixing device passing through the middle of the preformed oil pipe and connected to the box, as well as the rigid support of the structure of the preformed oil pipe itself, can effectively limit the displacement and rotation of the preformed oil pipe, thereby improving the installation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0030] Figure 1 This is a schematic structural diagram of a preformed oil pipe provided in a preferred embodiment of Example 1 of the present invention;

[0031] Figure 2 This is a schematic structural diagram of a preformed oil pipe provided in a preferred embodiment of Example 2 of the present invention;

[0032] Figure 3 This is a schematic structural diagram of a preformed oil pipe provided in another preferred embodiment of Example 2 of the present invention;

[0033] Figure 4 This is a structural diagram of a special-shaped oil pipe connection structure in a box provided in a preferred embodiment of Example 2 of the present invention;

[0034] Figure 5 This is a schematic diagram of the installation process of the preformed oil pipe in the box in a preferred implementation manner of Example 2 of the present invention;

[0035] Figure 6 This is a schematic diagram of the installation process of the preformed oil pipe in the box in a preferred implementation manner of Example 2 of the present invention;

[0036] Figure 7 This is a schematic diagram of the installation process of the preformed oil pipe in the box in a preferred implementation manner of Example 2 of the present invention.

[0037] Description of reference numerals:

[0038] Preformed oil pipe 10 , first section 11 , second section 12 , third section 13 , annular sealing groove 14 , box body 20 , first mounting hole 21 , second mounting hole 22 . DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. In the description of the present invention, it should be noted that the term "or" is generally used in the sense of including "and / or" unless the content clearly indicates otherwise.

[0040] In the description of the present application, the terms "first", "second", etc. are only used to distinguish the descriptions and should not be understood as indicating or implying relative importance.

[0041] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] Example 1

[0043] refer to Figure 1In order to solve the defects of the traditional oil pipe's own structure and the installation process, an embodiment of the present invention provides a special-shaped oil pipe connection structure in a box body. Preferably, the connection structure includes a box body 20, a preformed oil pipe 10 and a fixing device; preferably, the inner surface of the box body 20 is provided with a first mounting hole 21 and a second mounting hole 22, which are used for oil outlet and oil return respectively; preferably, the preformed oil pipe 10 includes at least a first section 11 and a second section 12, the free end of the first section 11 is used to coaxially seal with the first mounting hole 21, and enables the preformed oil pipe 10 to rotate with the first mounting hole 21 as the axis, and the free end of the second section 12 is used to coaxially seal with the second mounting hole 22 after rotation; preferably, the fixing device passes through the middle of the preformed oil pipe 10 and is connected to the box body 20, so as to limit the displacement of the preformed oil pipe 10.

[0044] In a preferred embodiment, the housing 20 is configured as a gear housing in an automobile transmission system, such as a transmission, drive axle, or transfer case, which is a sealed housing structure that requires internal lubrication. The housing 20 is provided with transmission components such as gear sets and bearings that require lubrication. These components require sufficient lubrication to reduce friction and wear during high-speed operation. The lubricating oil stored in the housing 20 is discharged and returned through the first mounting hole 21 and the second mounting hole 22. Please refer to the structure of the housing 20. Figure 4 .

[0045] Specifically, the positions of the first mounting hole 21 and the second mounting hole 22 are configured based on the distribution of lubrication-required points within the housing 20, and are not limited herein. In this embodiment, the first mounting hole 21 and the second mounting hole 22 are arranged non-coaxially. Those skilled in the art will appreciate that the purpose of this non-coaxial arrangement is to ensure that the preformed oil pipe 10 can reach specific lubrication locations.

[0046] In a preferred embodiment, the preformed oil pipe 10 refers to an oil pipe that has been pre-formed according to a specific spatial path and geometric shape before installation. Its shape and structure are specifically configured according to the installation space constraints and oil delivery requirements. The preformed oil pipe 10 is formed using an integrated molding process and is made of corrosion-resistant metal materials. The inner surface of the pipe is treated to reduce fluid resistance. Specifically, the preformed oil pipe 10 not only serves as a delivery channel for lubricating oil, but also can be provided with oil injection holes at specific locations according to actual needs. These oil injection holes can be machined and formed on the sidewall of the preformed oil pipe 10. The injection direction, angle, and number of the oil injection holes are specifically configured according to the location of the lubrication point to ensure that the lubricating oil can be directed to high-load friction areas such as bearings and gear meshing surfaces to form a stable oil film layer. Because the specific specifications and dimensions of the preformed oil pipe 10 are limited by the dimensions of the tank 20, the dimensional parameters of the preformed oil pipe 10 are not limited in this embodiment. Those skilled in the art can configure the dimensions of the preformed oil pipe 10 as needed based on the specific size or shape of the oil tank.

[0047] In this embodiment, the preformed oil pipe 10 is integrated into the housing 20, that is, the preformed oil pipe 10 is configured as a built-in component of the lubrication system of the housing 20. On the one hand, it can ensure the closedness and integrity of the lubrication system, avoid interference with the lubrication system by the external environment, and at the same time reduce external connection points and reduce the risk of leakage; on the other hand, the built-in preformed oil pipe 10 can more accurately transport the lubricating oil to a specific position inside the housing 20 to optimize the lubrication effect; in addition, integrating the preformed oil pipe 10 into the housing 20 also helps to make the overall structure more compact, thereby reducing external protruding structures and reducing the overall space occupancy of the transmission system.

[0048] In a preferred embodiment, the free end of the first section 11 is provided with two annular sealing grooves 14, each containing a compressible sealing element for radially sealing between the preformed oil pipe 10 and the first mounting hole 21. The free end flange surface of the second section 12 is provided with a groove, containing a sealing element for end-face sealing with the second mounting hole 22.

[0049] Preferably, the sealing element is configured as an O-ring, which has the advantages of simple structure, reliable sealing effect, and easy replacement. The O-ring is preferably made of fluororubber, which has excellent oil resistance, temperature resistance, and aging resistance. It can maintain good elasticity and sealing performance within the operating temperature range of -20°C to 200°C and has excellent chemical stability to various lubricants.

[0050] Specifically, the size of the annular sealing groove 14 matches the specific size of the selected sealing element. Usually, the groove width is slightly larger than the cross-sectional diameter of the O-ring, and the groove depth needs to take into account the sealing compression amount.

[0051] In this embodiment, when the end of the first segment 11 is inserted into the first mounting hole 21 and the end of the second segment 12 is sealed against the second mounting hole 22, the O-ring is compressed, resulting in an appropriate compression ratio (typically 15%-20%). This compression deformation generates an elastic reaction force that effectively seals and prevents oil leakage. The sealing segment length is matched to the insertion depth, ensuring consistent compression at both ends, resulting in a reliable seal and reducing the system leakage rate to below 0.01 mL / min, meeting the testing requirements of the ISO 10763 standard.

[0052] In a preferred embodiment, the fixing device includes a bolt and a threaded hole that fits into the box body 20; preferably, a predetermined gap is provided between the middle of the preformed oil pipe 10 and the inner surface of the box body 20, and the fixing device is connected to the box body 20 through the predetermined gap.

[0053] In a preferred embodiment, the bolts are preferably standard fasteners of M6 specification, and the material can be selected from high-strength steel to ensure sufficient tensile strength and shear resistance; and the bolt installation position is preferably set in the central part of the preformed oil pipe 10. This area usually has the highest rigidity strength, which is conducive to providing a stable fixing effect.

[0054] Preferably, the pre-tightening force of the bolt is configured to resist the axial vibration displacement of the oil pipe and suppress the circumferential rotation tendency of the oil pipe.

[0055] Specifically, after the bolts pass through the preset fixing holes in the preformed oil pipe 10, they precisely mate with the threaded holes in the housing 20, using a preload force to resist potential axial vibration displacement of the preformed oil pipe 10. Preferably, the recommended preload torque is ≥ 50 N·m. A predetermined gap is maintained between the center of the preformed oil pipe 10 and the surface of the housing 20. This gap, controlled within the range of 5-10 mm, facilitates installation and creates the necessary space for the bolts to pass through. Furthermore, the clearance between the bolts and the fixing holes is precisely controlled to within 0.05 mm, which not only limits axial displacement of the preformed oil pipe 10 but also effectively suppresses its tendency to circumferential rotation, increasing the vibration tolerance frequency of the connection point to above 300 Hz.

[0056] In a preferred embodiment, there is a first preset angle α1 between the first section 11 and the second section 12. The first preset angle α1 is not a right angle, that is, the overall shape of the preformed oil pipe 10 is not a straight tube, but is configured as a tube with a bending angle. At this time, the preformed oil pipe 10 is roughly L-shaped, which is used to adapt to the spatial constraints of the non-coaxial arrangement of the first mounting hole 21 and the second mounting hole 22 in the box body 20, and at the same time provides a rotary installation method that is structurally compatible with it.

[0057] In a preferred embodiment, the first predetermined angle α1 can be configured as a right angle, an acute angle, or an obtuse angle. The specific angle value is determined by the relative position of the first mounting hole 21 and the second mounting hole 22 and is not specifically limited in this embodiment. This curved structure allows the preformed oil pipe 10 to be rotated during installation to achieve spatial path matching and adjustment, overcoming the limitation of traditional straight pipes that cannot adapt to non-collinear mounting holes.

[0058] Preferably, during installation, the preformed oil pipe 10 is assembled by inserting one end first, rotating and adjusting it, and then inserting the other end. First, the free end of the first section 11 of the preformed oil pipe 10 is inserted axially along the first mounting hole 21 to a certain depth, so that its sealing element forms a preliminary sealing contact with the first mounting hole 21. At this point, due to the presence of the first preset angle α1, the end of the second section 12 is not yet aligned with the second mounting hole 22. Next, the preformed oil pipe 10 is rotated around the inserted portion of the first section 11, utilizing the spatial geometric characteristics of the first preset angle α1 to gradually approach and ultimately coincide with the axis of the second mounting hole 22. Once the end of the second section 12 is aligned with the axis of the second mounting hole 22, the second section 12 and the second mounting hole 22 are end-face sealed, while ensuring that the first section 11 does not disengage from the first mounting hole 21, thereby completing the double-end sealing installation.

[0059] Compared with the traditional linear insertion installation method, the embodiment of the present invention allows the connection of non-collinear mounting holes within a limited installation space, has stronger adaptability, and reduces the coaxiality and position accuracy requirements for the mounting holes, thereby reducing the burden on the processing accuracy of the box 20.

[0060] In practical applications, this L-shaped preformed oil pipe 10 is particularly suitable for box 20 structures with compact space and limited installation hole positions, such as inter-gear lubrication in gearboxes, bearing seat lubrication systems, etc., and can effectively solve technical problems that traditional straight pipes cannot reach or are difficult to install.

[0061] Example 2

[0062] refer to Figure 3-Figure 7 The embodiment of the present invention provides a special-shaped oil pipe connection structure in a box body. Preferably, the connection structure includes a box body 20, a preformed oil pipe 10 and a fixing device. Different from the above-mentioned embodiment 1, the preformed oil pipe 10 in this embodiment includes a first section 11, a second section 12 and a third section 13, and the third section 13 is arranged between the first section 11 and the second section 12; the free end of the first section 11 is provided with two annular sealing grooves 14, and the annular sealing grooves 14 are provided with compressible sealing elements to achieve radial sealing between the first section 11 and the first mounting hole 21; the free end of the second section 12 can be provided with the same radial sealing structure as the first section 11, and can also be provided with the same end face sealing structure as the above-mentioned embodiment 1. In addition, other technical features are the same as those of the above-mentioned embodiment 1. The technical features already recorded in the above-mentioned embodiment 1 are naturally inherited in this embodiment and will not be repeated one by one.

[0063] refer to Figure 2-Figure 4In a preferred embodiment, the first section 11 and the second section 12 are arranged parallel to each other and offset by a predetermined distance. This predetermined distance is at least greater than the diameter of the preformed oil tube 10, for example, a 15 mm offset. This allows the preformed oil tube 10 to accommodate the positional requirements of the two non-coaxial mounting holes on the housing 20, thereby increasing the degree of freedom in the arrangement of the mounting holes on the housing 20. During installation, the free end of the first section 11 coaxially and sealingly engages with the first mounting hole 21. The preformed oil tube 10 is then rotated about the first mounting hole 21. After this rotation, the free end of the second section 12 coaxially and sealingly engages with the second mounting hole 22.

[0064] In a preferred embodiment, the third section 13 serves as a connecting section, and a second preset angle α2 is set between it and the first section 11, and a third preset angle α3 is set between it and the second section 12. These two angles jointly determine the spatial geometric shape of the preformed oil pipe 10. By precisely controlling the values of α2 and α3, the preformed oil pipe 10 can be formed into a Z-shape or other special-shaped structure to adapt to the complex installation path requirements in the box 20 and solve the space constraint problem that conventional straight pipes cannot solve.

[0065] In an optional embodiment, the second preset angle α2 and the third preset angle α3 are both configured as obtuse angles, specifically, angles of approximately 120°. The preformed oil pipe 10 now has a generally Z-shaped bend structure, which not only meets the complex requirements of oil injection and lubrication routes but also provides excellent rotational adaptability during installation. Rotational alignment allows for easy alignment of both ends with their respective mounting holes, significantly improving installation efficiency while also reducing the machining precision requirements for the housing 20.

[0066] Preferably, the second preset angle α2 and the third preset angle α3 are configured symmetrically or asymmetrically to match the positions of the first mounting hole 21 and / or the second mounting hole 22. The specific values can be adjusted specifically and flexibly based on the injection point location and the distribution of the first and second mounting holes 21, 22. When configured symmetrically, i.e., the second preset angle α2 equals the third preset angle α3, the preformed oil pipe 10 exhibits a regular Z-shaped configuration, suitable for installation scenarios where the first and second mounting holes 21, 22 are parallel but laterally offset. This symmetrical design ensures uniform stress distribution and consistent vibration characteristics, improving system stability and sealing reliability. When configured asymmetrically, i.e., the second preset angle α2 is not equal to the third preset angle α3, the preformed oil pipe 10 exhibits an irregular Z-shaped configuration, flexibly adapting to complex installation environments where the first and second mounting holes 21, 22 are both laterally offset and angularly misaligned, further enhancing the spatial adaptability of the preformed oil pipe 10.

[0067] like Figure 2In a preferred embodiment, the third section 13 is configured as a straight structure. At this time, the preformed oil pipe 10 presents a typical Z-shaped structure, which not only simplifies the manufacturing process of the preformed oil pipe 10, but also facilitates the setting of fixing points on its surface, thereby facilitating the installation and positioning of the fixing device.

[0068] like Figure 3 In another preferred embodiment, the third section 13 is configured as a non-straight bend or curved structure. It should be noted that in this embodiment, the third section 13 can have a single bend or curved structure, or it can have multiple continuous bends or curved structures, such as an S-shape, a wavy shape, or other more complex three-dimensional configurations. This provides the preformed oil pipe 10 with greater design freedom and adaptability. This configuration allows the preformed oil pipe 10 to assume a more complex three-dimensional curved form, enabling it to bypass obstacles within the housing 20 and reach lubrication locations inaccessible to conventional Z-shaped oil pipes. The curved third section 13 also increases the effective length of the oil pipe, providing a longer flow path at the same end-to-end spacing. This is particularly valuable in certain applications requiring reduced flow velocity or increased heat exchange area. Furthermore, by increasing the spatial complexity of the structure, the non-straight third section 13 improves the inherent stiffness and vibration resistance of the preformed oil pipe 10, ensuring better structural stability and sealing reliability under high-vibration conditions.

[0069] Specifically, no matter what shape scheme is adopted for the third section 13, the overall structure of the preformed oil pipe 10 fully considers the balance between assembly process and maintenance convenience. By optimizing the length ratio and angle configuration of each section, the preformed oil pipe 10 can complete the rotational installation action in the minimum space, reducing the difficulty of assembly, while ensuring that it can be easily disassembled and replaced during maintenance, thereby improving the product's full life cycle utilization efficiency.

[0070] Taking the third section 13 as a straight tube as an example, in a preferred embodiment, the installation method of the preformed oil pipe 10 specifically includes the following steps:

[0071] First, the free end of the first section 11 of the preformed oil pipe 10 is inserted into the first mounting hole 21 to a certain depth, such as 20 mm. Figure 5 At this time, the free end of the first section 11 enters the first mounting hole 21, but due to the Z-shaped offset structure, the end of the second section 12 has not yet aligned with the second mounting hole 22; then, as shown in FIG. Figure 6 , with the inserted portion of the first section 11 as the axis, the preformed oil pipe 10 is rotated by a certain angle, such as 60°, and the spatial posture adjustment characteristics of the Z-shaped structure are utilized to make the end of the second section 12 coincide with the axis of the second mounting hole 22; further, the preformed oil pipe 10 is further advanced, so that the second section 12 is inserted into the second mounting hole 22 in the reverse direction for about 10 mm, forming an effective sealing section, such as Figure 7 At this time, the first section 11 and the second section 12 form a sealing fit in their respective mounting holes, and the sealing elements are appropriately compressed. Finally, a through-bolt is passed horizontally through the preset fixing hole of the third section 13 of the preformed oil pipe 10, and is connected and tightened with the threaded hole on the inner surface of the box body 20, thereby limiting the axial displacement and rotational freedom of the preformed oil pipe 10.

[0072] This installation method allows for non-collinear placement of the two mounting holes, offering strong adaptability and suitability for irregularly shaped hole arrangements, meeting complex oil injection and lubrication routes. It also reduces the machining precision requirements for the housing 20, improving assembly efficiency and achieving a reliable seal. Furthermore, since the preformed oil pipe 10 requires only a single bolt for securing, assembly difficulty and component weight are reduced.

[0073] Example 3

[0074] An embodiment of the present invention further provides a vehicle, which includes the special-shaped oil pipe connection structure in the box body as described in the above embodiment 1 or 2. In this embodiment, the type of vehicle is not specifically limited.

[0075] In a preferred embodiment, the special-shaped oil pipe connection structure is installed within a vehicle's powertrain, such as the engine, transmission, transfer case, drive axle, or steering gear, within sealed enclosures that require precise lubrication. During vehicle operation, these transmission components are often subject to high speeds, high loads, and high temperatures, placing extremely high demands on the reliability and stability of the lubrication system.

[0076] In a preferred embodiment, when the special-shaped oil pipe connection structure in the box is applied to a vehicle gearbox, the preformed oil pipe 10 transports the lubricating oil from the oil pool at the bottom of the gearbox to the friction parts such as the meshing surfaces of each gear and bearings. Due to the small internal space and complex structure of the gearbox, traditional straight-pipe oil channels are often difficult to achieve an ideal lubrication path. The L-shaped or Z-shaped preformed oil pipe 10 of the present invention can form an optimized lubricating oil delivery channel according to actual space constraints through the reasonable design of the first preset angle α1, the second preset angle α2 and the third preset angle α3, ensuring that each key lubrication point can be adequately supplied with oil.

[0077] Specifically, the vehicle is inevitably subject to vibration, shock, and temperature fluctuations during driving, all of which can adversely affect the connection structure within the housing 20. The special-shaped oil pipe connection structure within the housing of the present invention, through the precise fit of the sealing element and the mounting hole, and the reliable fixation of the fixing device, can effectively withstand the various dynamic loads generated during vehicle operation and maintain the sealing integrity of the oil system.

[0078] Furthermore, the present invention's in-box special-shaped oil pipe connection structure adapts to the lightweight and compact design trend of modern vehicles. By optimizing the spatial layout of the special-shaped oil pipes, the volume occupied by the lubrication system is reduced, facilitating the miniaturization of transmission devices such as gearboxes. Furthermore, the integrated design of the preformed oil pipe 10 reduces the number of connection points, lowering the risk of leakage, improving vehicle reliability, and extending vehicle maintenance cycles.

[0079] Furthermore, the lubricating components of the transmission system may require inspection and replacement throughout the vehicle's lifecycle. The present invention's in-box special-shaped oil pipe connection structure utilizes a rotary installation method, allowing maintenance personnel to conveniently complete assembly and disassembly operations within a limited workspace, significantly improving vehicle maintainability and reducing maintenance costs and time.

[0080] In a preferred embodiment, with the rapid development of new energy vehicles, the present invention's in-tank special-shaped oil pipe connection structure can also meet the needs of new application scenarios such as reducers and motor cooling systems in electric vehicles. By rationally selecting pipe and sealing materials to adapt them to the unique operating environment and media characteristics of electric vehicles, the application scope and versatility of the present invention are further expanded.

[0081] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely illustrative and are not intended to limit the scope of the present application. Various changes and modifications may be made therein by those skilled in the art without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0082] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0083] Similarly, it should be understood that in order to streamline the present application and aid in understanding one or more of the various inventive aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, this approach of the present application should not be interpreted as reflecting the intention that the application claimed for protection requires more features than those explicitly recited in each claim. More precisely, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with fewer features than all the features of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present application.

[0084] Those skilled in the art will understand that, except where mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or apparatus disclosed herein may be combined in any combination. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that provides the same, equivalent, or similar purpose.

Claims

1. A special-shaped oil pipe connection structure in a box, characterized in that: It includes a box body, preformed oil pipe and fixing device; The box body stores lubricating oil, and the inner surface of the box body is provided with a first mounting hole and a second mounting hole, which are non-coaxially arranged and are used for oil outlet and oil return respectively; The preformed oil pipe comprises at least a first section and a second section. The free end of the first section is configured to coaxially seal with the first mounting hole, and the preformed oil pipe is configured to rotate about the first mounting hole. The free end of the second section is configured to coaxially seal with the second mounting hole after rotation. The fixing device passes through the middle portion of the preformed oil pipe and is connected to the box body, and is used to limit the displacement of the preformed oil pipe.

2. The special-shaped oil pipe connection structure in the box according to claim 1, characterized in that: An annular sealing groove is provided at the free end of the first section and / or the second section, and a compressible sealing element is provided in the annular sealing groove.

3. The special-shaped oil pipe connection structure in the box according to claim 1, characterized in that: The fixing device includes a bolt and a threaded hole matched with the box body, and the bolt is provided through the middle of the preformed oil pipe; The pre-tightening force of the bolt is configured to resist the axial vibration displacement of the oil pipe and suppress the circumferential rotation tendency of the oil pipe.

4. The special-shaped oil pipe connection structure in the box according to claim 3, characterized in that: A predetermined gap is provided between the middle portion of the preformed oil pipe and the inner surface of the box body, and the bolt is connected to the box body through the predetermined gap.

5. The special-shaped oil pipe connection structure in the box according to claim 1, characterized in that: A first preset angle is defined between the first section and the second section, and the first preset angle is not a straight angle.

6. The special-shaped oil pipe connection structure in a box according to any one of claims 1 to 4, characterized in that: The preformed oil pipe further includes a third section, wherein the third section is disposed between the first section and the second section; The first section and the second section are arranged in parallel, and are offset by a preset distance.

7. The special-shaped oil pipe connection structure in the box according to claim 6, characterized in that: A second preset angle is set between the first section and the third section, and a third preset angle is set between the second section and the third section; The second preset angle and the third preset angle are configured as a symmetrical structure or an asymmetrical structure, so as to match the position of the first mounting hole and / or the second mounting hole.

8. The special-shaped oil pipe connection structure in a box according to claim 7, characterized in that: The third section is a straight structure.

9. The special-shaped oil pipe connection structure in a box according to claim 7, characterized in that: The third section is configured as a non-straight bent or curved structure.

10. The special-shaped oil pipe connection structure in a box according to claim 1, characterized in that: The preformed oil pipe is configured as an integrally formed metal pipe.

11. A vehicle, characterized in that: It comprises the special-shaped oil pipe connection structure in the box body according to any one of claims 1 to 10.

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