Integrated gearbox shell and machining process

Abstract

The invention discloses an integrated gearbox shell and a machining process, and relates to the technical field of gearbox shells, the integrated gearbox shell comprises a shell and a heat dissipation mechanism used for conducting heat of the shell, the heat dissipation mechanism comprises a metal plate and heat dissipation fins which are detachably installed on the side wall of the shell, and the face, making contact with the metal plate, of the shell is coated with heat conduction silicone grease; the cleaning and refreshing mechanism is composed of a functional part and a driving part; through cooperative arrangement of the driving part and the functional part, an automatic maintenance link is constructed, during use, a metal plate is firstly dismantled, the metal plate is acted to be away from the shell, the driving part downwards pushes the mounting frame, and old grease is removed through a scraping assembly at the bottom end of the driving part; after cleaning, the coating assembly is installed on the inner side of the mounting frame, so that the metal plate is reset, in the process that the metal plate is attached to the shell, the driving part reversely drives the mounting frame to move upwards, new heat conduction silicone oil is coated on the surface to be contacted through the coating assembly, the cleaning-coating process is completed, automatic maintenance is achieved, operation is simplified, and efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of gearbox housing technology, specifically to an integrated gearbox housing and its manufacturing process. Background Technology

[0002] In the field of automotive transmissions, heat dissipation performance plays a crucial role in their operational stability and service life. Traditional transmission housings and heat sinks are separate structures, relying on thermal grease to fill the gaps for heat transfer. However, during long-term use, the high-temperature environment generated by the transmission operation causes the thermal grease to evaporate, gradually drying out, hardening, and even becoming brittle. This prevents it from tightly adhering to the microscopic gaps between the metal heat sink and the transmission housing, resulting in an air layer at the contact surface. This significantly increases thermal resistance and drastically reduces heat dissipation efficiency.

[0003] When thermal grease dries out or hardens, current technology requires manual disassembly of the metal heatsink from the housing beforehand, separating the metal heatsink from the housing, and then cleaning the dried grease from the contact surface separately with a scraper. This process is cumbersome, requiring step-by-step disassembly and cleaning, and consuming a lot of manpower.

[0004] While integrated gearbox housings attempt to integrate functional structures to optimize space layout and assembly efficiency, existing solutions do not specifically address the heat dissipation problem. Their heat dissipation-related structural designs still cannot avoid the drawbacks of relying on thermal grease. Under long-term high-temperature and vibration conditions, they also face the problems of increased thermal resistance and heat dissipation failure caused by the evaporation and hardening of thermal grease / oil, thus failing to fully leverage the advantages of integrated design in improving heat dissipation performance. Summary of the Invention

[0005] To solve the above-mentioned technical problems, an integrated gearbox housing and its processing technology are provided, which solves the problems existing in the background technology.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an integrated gearbox housing, comprising a housing and a heat dissipation mechanism for conducting heat of the housing, the heat dissipation mechanism comprising a metal plate detachably mounted on the side wall of the housing, a plurality of heat dissipation fins arranged on the metal plate, the side of the housing in contact with the metal plate being coated with thermally conductive silicone grease, and further comprising a cleaning and reapplying mechanism for quickly treating dried and hardened thermally conductive silicone grease; The cleaning and coating mechanism consists of a functional unit and a driving unit. The functional unit is slidably mounted above the metal plate, and the driving unit consists of two sets symmetrically distributed on both sides of the metal plate. The functional unit includes a U-shaped mounting bracket, the bottom end of which is provided with a scraping component, and the inner side of which a coating component is detachably mounted. The drive unit consists of linkage component one, linkage component two, and linkage component three, which are arranged side by side.

[0007] Preferably, the linkage component includes a toothed belt disposed on the side of the metal plate and a gear located at both ends of the toothed belt. A connecting piece is rotatably connected to the end of the gear's central shaft away from the metal plate. The connecting piece is fixed perpendicularly to the side wall of the housing. A connecting column is fixed between the side wall of the mounting bracket and the toothed belt.

[0008] Preferably, the linkage assembly includes an L-shaped movable piece, one end of which is fixedly connected to the middle of the side of the metal plate, and the other end of which is fixedly connected to a threaded sleeve. The inner thread of the threaded sleeve is connected to a lead screw that is rotatably connected to the side wall of the housing.

[0009] Preferably, the second linkage component includes a bearing housing located between the lead screw and the toothed belt. The bearing housing is fixed perpendicularly to the side wall of the housing, and a linkage column is rotatably mounted on its inner side. One end of the linkage column is connected to the lead screw via a bevel gear, and the other end of the linkage column passes through the toothed belt and is fixed with a second gear. The second gear meshes with the inner tooth surface of the toothed belt.

[0010] Preferably, the scraping assembly includes a scraper head and two connecting blocks symmetrically fixed to the top of the scraper head. The bottom end has an insertion port adapted to the connecting blocks. A stud is fixed on the inner wall of the deepest part of the insertion port, and a nut is threaded onto the shaft of the stud.

[0011] Preferably, the coating assembly includes a panel, a sponge is glued to the side of the panel facing the housing, wedge blocks are fixed on both sides of the panel, and wedge grooves adapted to the wedge blocks are opened on both sides inside the mounting bracket.

[0012] Preferably, a limiting ring is fixedly sleeved at the end of the lead screw, and the limiting ring is ring-shaped.

[0013] Preferably, screws are threaded through all four corners of the metal plate, and the screws are threadedly connected to the housing.

[0014] Compared with the prior art, the advantages of the present invention are as follows: (1) By coordinating the drive unit and the functional unit, an automated maintenance link is constructed. When in use, the metal plate is first removed and the metal plate is moved away from the housing. During this process, the drive unit pushes down the mounting bracket and uses its bottom end to scrape off the old grease from the scraping component. After cleaning, the coating component is installed inside the mounting bracket to reset the metal plate and make it fit the housing. During this process, the drive unit drives the mounting bracket to move upward in the opposite direction. The coating component is used to coat the new thermally conductive silicone oil onto the surface to be contacted, completing the "cleaning-coating" process, realizing automated maintenance, simplifying operation and improving efficiency.

[0015] (2) The quick assembly and secure connection between the scraper assembly and the mounting bracket are achieved through the use of connecting blocks, nuts, and studs: During installation, the connecting block is inserted into the socket until the stud penetrates the connecting block. Then, the nut is screwed into the stud shaft, tightening the nut along the stud shaft and pressing it against the connecting block, thus firmly fixing the scraper to the mounting bracket. This structural design ensures the connection stability of the scraper assembly during operation and simplifies the scraper replacement process through threaded engagement and plug-in structure. It also facilitates quick maintenance when the scraper is worn or needs cleaning, improving the practicality and maintenance efficiency of the cleaning and coating mechanism. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle; Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point B; Figure 5 This is a schematic diagram of the functional parts of the present invention broken down; Figure 6 This is a schematic diagram of the processing steps of the present invention.

[0017] The numbers on the map are: 1. Housing; 2. Metal plate; 3. Heat dissipation fins; 4. Screws; 5. Functional parts; 6. Drive unit; 51. Mounting bracket; 52. Scraping assembly; 53. Coating assembly; 54. Connecting post; 520. Scraper head; 521. Connecting block; 522. Nut; 523. Stud; 530. Panel; 531. Sponge; 532. Wedge block; 61. Linkage assembly one; 62. Linkage assembly two; 63. Linkage assembly three; 610. Toothed belt; 611. Gear one; 612. Connecting piece; 620. Bearing seat; 621. Linkage post; 622. Gear two; 630. Lead screw; 631. Screw sleeve; 632. Moving piece; 633. Limiting ring. Detailed Implementation

[0018] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0019] Reference Figure 1-5 As shown, an integrated gearbox housing includes a housing 1 and a heat dissipation mechanism for conducting heat from the housing 1; The heat dissipation mechanism includes a metal plate 2 that can be detachably installed on the side wall of the housing 1, and a number of heat dissipation fins 3 arranged on the metal plate 2. The side of the housing 1 that contacts the metal plate 2 is coated with thermal grease. Screws 4 are threaded through all four corners of the metal plate 2, and screws 4 are threadedly connected to the housing 1. With the arrangement of metal plate 2 and heat dissipation fins 3, the heat generated by the internal mechanical operation of shell 1 is first quickly conducted to metal plate 2 through the thermal grease on the contact surface; metal plate 2, as a "heat carrier", further transfers the heat to the densely arranged heat dissipation fins 3 on the surface. The heat dissipation fins 3 increase the contact area with the air, and combined with the air flow, the heat can be quickly dissipated into the air, forming an efficient heat dissipation link, thereby effectively cooling shell 1. By using screw 4, the metal plate 2 and the housing 1 can be fastened together with a threaded connection to ensure a tight fit between the two and reduce gaps to ensure the heat transfer efficiency of the thermal grease. At the same time, it can also achieve a detachable connection. When it is necessary to check the condition of the thermal grease, clean the heat sink fins 3, or replace the parts due to the failure of the thermal grease or wear of the metal plate, the metal plate 2 can be quickly separated by simply turning screw 4, which greatly reduces the complexity of maintenance operations.

[0020] Furthermore, referring to 2-5, it is worth noting that it also includes a cleaning and reapplying mechanism for quickly treating dried and hardened thermal grease. The cleaning and coating mechanism consists of a functional unit 5 and a drive unit 6. The functional unit 5 is slidably mounted above the metal plate 2, and the drive unit 6 consists of two sets symmetrically distributed on both sides of the metal plate 2. Functional unit 5 includes a U-shaped mounting bracket 51, with a scraping component 52 at the bottom end of the mounting bracket 51, and a coating component detachably mounted on the inner side of the mounting bracket 51. By coordinating the drive unit 6 and the functional unit 5, an automated maintenance process is established. In use, the metal plate 2 is first removed, moving it away from the housing 1. During this process, the drive unit 6 pushes down the mounting bracket 51, using the scraping component 52 at its bottom to remove old grease. After cleaning, the coating component 53 is installed inside the mounting bracket 51 to reset the metal plate 2 and make it fit against the housing 1. During this process, the drive unit 6 drives the mounting bracket 51 upward in the opposite direction, and the coating component 53 applies new thermally conductive silicone oil to the surface to be contacted, completing the "cleaning-coating" process, achieving automated maintenance, simplifying operation, and improving efficiency.

[0021] Furthermore, referring to Figure 3 and Figure 4 As shown, it is worth noting that the drive unit 6 is composed of linkage component one 61, linkage component two 62 and linkage component three 63, which are arranged side by side. The linkage assembly 61 includes a toothed belt 610 located on the side of the metal plate 2 and a gear 611 located at both ends of the toothed belt 610. A connecting piece 612 is rotatably connected to the end of the gear 611 away from the metal plate 2. The connecting piece 612 is fixed perpendicularly to the side wall of the housing 1. A connecting post 54 is fixed between the side wall of the mounting bracket 51 and the toothed belt 610. The linkage assembly 63 includes an L-shaped movable piece 632. One end of the movable piece 632 is fixedly connected to the middle of the side of the metal plate 2, and the other end of the movable piece 632 is fixedly connected to a threaded sleeve 631. The inner thread of the threaded sleeve 631 is connected to a lead screw 630 that is rotatably connected to the side wall of the housing 1. The second linkage assembly 62 includes a bearing housing 620 located between the lead screw 630 and the toothed belt 610. The bearing housing 620 is fixed perpendicularly to the side wall of the housing 1, and a linkage column 621 is rotatably mounted on its inner side. One end of the linkage column 621 is connected to the lead screw 630 via a bevel gear, and the other end of the linkage column 621 is inserted into the toothed belt 610 and fixed with a gear 622. The gear 622 meshes with the inner tooth surface of the toothed belt 610. With the drive unit 6 in place, once the loose screw 4 releases the metal plate 2 from the housing 1, simply pulling the metal plate 2 away from the housing 1 triggers an automated transmission involving multiple components: as the metal plate 2 moves, it drives the fixed moving piece 632 to move synchronously, causing the screw sleeve 631 to slide along the lead screw 630, driving the lead screw 630 to rotate; the lead screw 630 drives the linkage column 621 via a bevel gear, and the gear 622 at the other end of the linkage column 621 rotates accordingly, thereby engaging and driving the toothed belt 610 to rotate; the toothed belt 610 pulls the mounting bracket 51 to move synchronously downwards via the connecting column 54, and the scraping component at its bottom slides down accordingly, automatically removing the dried and hardened old silicone grease from the contact surface between the housing 1 and the metal plate 2. The entire process requires no additional operation of the drive unit; the old grease removal is completed by simply pulling the metal plate 2, achieving synchronization of "separating the metal plate 2" and "removing the old grease," greatly simplifying the operation steps and improving maintenance efficiency.

[0022] Furthermore, referring to Figure 3 and Figure 4 As shown, it is worth noting that a limiting ring 633 is fixedly sleeved at the end of the lead screw 630, and the limiting ring 633 is annular. With the setting of the limiting ring 633, its annular structure is fixedly sleeved at the end of the lead screw 630, which can mechanically limit the sliding stroke of the threaded sleeve 631 along the lead screw. When the metal plate 2 is pulled to drive the moving piece 632 and the threaded sleeve 631 to move along the lead screw 630, the limiting ring 633 can prevent the threaded sleeve from sliding excessively and disengaging from the lead screw, thus avoiding the separation of the threaded sleeve 631 from the lead screw 630 due to excessive operation range, and ensuring the transmission integrity of the three-linkage component 63.

[0023] Furthermore, referring to Figure 3 and Figure 4 As shown, it is worth noting that the scraping component 52 includes a scraper head 520 and two connecting blocks 521 symmetrically fixed to the top of the scraper head 520. The bottom end of the 51 is provided with an insertion port that is compatible with the connecting block 521. A stud 523 is fixed on the inner wall of the deepest part of the insertion port. The shank of the stud 523 is threaded with a nut 522. The connection of the connecting block 521, nut 522, and stud 523 enables quick assembly and disassembly, as well as a secure connection, between the scraper assembly 52 and the mounting bracket 51. During installation, the connecting block 521 is aligned with the insertion port and inserted until the stud 523 penetrates the connecting block 521. Then, the nut 522 is screwed into the stud 523, tightening it along the stud 523 and pressing it against the connecting block 521, thus firmly fixing the scraper head 520 to the mounting bracket 51. This structural design ensures the connection stability of the scraper assembly 52 during operation and simplifies the replacement process of the scraper head 520 through its threaded fit and plug-in structure. It also facilitates quick maintenance when the scraper head 520 is worn or requires cleaning, improving the practicality and maintenance efficiency of the cleaning and repainting mechanism.

[0024] Furthermore, referring to Figure 3 and Figure 4 As shown, it is worth noting that the coating assembly 53 includes a panel 530, a sponge 531 is glued to the side of the panel 530 facing the housing 1, and wedge blocks 532 are fixed on both sides of the panel 530. Wedge grooves that are adapted to the wedge blocks 532 are opened on both sides inside the mounting bracket 51. The coating component 53 enables convenient application of new thermally conductive silicone oil and rapid component replacement: the sponge 531 can pre-absorb and store new thermally conductive silicone oil; during installation, the wedge-shaped blocks 532 on both sides of the panel engage with the wedge-shaped grooves, and the self-locking property of the wedge structure ensures that the coating component is securely mounted inside the mounting bracket 51, preventing loosening or displacement during the coating process. When the mounting bracket 51 moves upward, the sponge 531 directly contacts the surfaces of the housing 1 and the metal plate 2, applying the silicone oil evenly through friction and pressure; during replacement, simply pull the panel 530 along the wedge-shaped groove direction to quickly disassemble the component to replenish the silicone oil or replace the sponge 531, ensuring coating uniformity, simplifying the consumable maintenance process, and improving the efficiency and reliability of the new coating operation.

[0025] Reference Figure 6 As shown, a processing technology for an integrated gearbox housing includes the following processing and assembly steps: S1: Basic component processing The housing 1 is made of die-cast aluminum alloy and then aged. The mounting surface (flatness ≤ 0.05 mm) and threaded holes and drive unit reference holes (position accuracy ± 0.1 mm) are machined by CNC milling. The metal plate 2 is made of 6-series aluminum alloy, cold-rolled and then laser-cut. The heat dissipation fins 3 are made of aluminum profile extrusion and fixed to the metal plate by brazing. After welding, stress-relief annealing is performed (verticality ≤ 0.5°). In the cleaning and coating mechanism components, the mounting bracket 51 is formed by powder metallurgy and galvanized. The scraper head 520 is quenched with Cr12MoV (HRC58-62). The connecting block 521 is welded to the stud 523. The panel 530 is injection molded. The sponge wiper 531 is fixed by gluing. In the drive unit components, the lead screw 630 is made of 45# steel with heat treatment (thread 6h grade). The linkage column 621 and other components are made of forged steel with carburizing and quenching. The toothed belt 610 is made of polyurethane. The gear 611 and the connecting piece 612 are connected by bearings. S2: Sub-component assembly When the drive unit is pre-installed, the connecting piece 612 is welded to the housing 1, the gear 611 meshes with the toothed belt 610, the linkage column 621 passes into the bearing seat 620 and its bevel gear meshes with the lead screw 630, the screw sleeve 631 connects to the moving piece 632, and the end of the lead screw is fixed with the limiting ring 633; ​​during the assembly of the cleaning and coating mechanism, the scraping component 52 is fixed to the mounting bracket 51 through the connecting block 521, the stud 523 and the nut 522. S3: Overall Assembly and Testing During final assembly, a 0.1-0.2mm layer of thermally conductive silicone oil is applied to the metal plate 2, which is then fixed to the housing 1 using screws 4 (torque 8-10 N·m). The drive linkage is tested to ensure synchronized operation of the functional units when the metal plate moves. Testing includes airtightness testing (0.3 MPa pressure holding for 5 minutes with no leakage), heat dissipation coefficient testing (≥20 W / (m²·K)), and vibration testing (10-2000 Hz, 500 hours). After testing, there should be no loosening and the mechanism's accuracy deviation should be ≤0.5mm.

[0026] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated gearbox housing, comprising a housing (1) and a heat dissipation mechanism for conducting heat from the housing (1), the heat dissipation mechanism comprising a metal plate (2) detachably mounted on the side wall of the housing (1) and a plurality of heat dissipation fins (3) arranged on the metal plate (2), wherein the side of the housing (1) in contact with the metal plate (2) is coated with thermally conductive silicone grease, characterized in that, It also includes a cleaning and reapplying mechanism for quickly removing dried and hardened thermal grease; The cleaning and coating mechanism consists of a functional part (5) and a driving part (6). The functional part (5) is slidably disposed above the metal plate (2), and the driving part (6) consists of two sets symmetrically distributed on both sides of the metal plate (2). The functional unit (5) includes a U-shaped mounting bracket (51), the bottom end of which is provided with a scraping component (52), and a coating component is detachably mounted on the inner side of the mounting bracket (51). The drive unit (6) consists of linkage component one (61), linkage component two (62) and linkage component three (63), which are arranged side by side.

2. The integrated gearbox housing according to claim 1, characterized in that, The linkage assembly (61) includes a toothed belt (610) located on the side of the metal plate (2) and a gear (611) located at both ends of the toothed belt (610). A connecting piece (612) is rotatably connected to the end of the gear (611) away from the metal plate (2). The connecting piece (612) is fixed perpendicularly to the side wall of the housing (1). A connecting column (54) is fixed between the side wall of the mounting bracket (51) and the toothed belt (610).

3. An integrated gearbox housing according to claim 2, characterized in that, The linkage assembly three (63) includes an L-shaped movable piece (632), one end of which is fixedly connected to the middle of the side of the metal plate (2), and the other end of which is fixedly connected to a threaded sleeve (631). The inner thread of the threaded sleeve (631) is connected to a lead screw (630) that is rotatably connected to the side wall of the housing (1).

4. An integrated gearbox housing according to claim 3, characterized in that, The second linkage assembly (62) includes a bearing seat (620) located between the lead screw (630) and the toothed belt (610). The bearing seat (620) is vertically fixed to the side wall of the housing (1), and a linkage column (621) is rotatably mounted on its inner side. One end of the linkage column (621) is connected to the lead screw (630) via a bevel gear. The other end of the linkage column (621) is inserted into the toothed belt (610) and fixed with a gear two (622). The gear two (622) meshes with the inner tooth surface of the toothed belt (610).

5. An integrated gearbox housing according to claim 1, characterized in that, The scraping assembly (52) includes a scraper (520) and two connecting blocks (521) symmetrically fixed to the top of the scraper (520). The bottom end of the 51 is provided with a socket that is compatible with the connecting block (521). A stud (523) is fixed on the inner wall of the deepest part of the socket. A nut (522) is threaded onto the shaft of the stud (523).

6. An integrated gearbox housing according to claim 1, characterized in that, The coating assembly (53) includes a panel (530), on which a sponge (531) is glued to the side facing the housing (1), and wedge blocks (532) are fixed on both sides of the panel (530). Wedge grooves that are adapted to the wedge blocks (532) are opened on both sides inside the mounting bracket (51).

7. An integrated gearbox housing according to claim 3, characterized in that, A limiting ring (633) is fixedly sleeved at the end of the lead screw (630), and the limiting ring (633) is ring-shaped.

8. An integrated gearbox housing according to claim 1, characterized in that, Screws (4) are threaded through all four corners of the metal plate (2), and the screws (4) are threaded to the housing (1).

9. A processing technology for an integrated gearbox housing, characterized in that, The processing and assembly steps include: S1. Basic component processing: The shell (1) is made of aluminum alloy die casting and then aged. The mounting plane, threaded holes, and drive reference holes are machined by CNC milling. The metal plate (2) is cold rolled and then laser cut. The heat dissipation fins (3) are made of aluminum profile extrusion and fixed to the metal plate by brazing. After welding, stress relief annealing is performed. In the cleaning and coating mechanism components, the mounting bracket (51) is formed by powder metallurgy and galvanized. The connecting block (521) is welded to the stud (523). The panel (530) is injection molded. The sponge (531) is fixed by gluing. The gear (611) and the connecting piece (612) are connected by bearings. S2, Sub-component assembly: During the pre-assembly of the drive unit, the connecting piece (612) is welded to the housing (1), the gear (611) meshes with the toothed belt (610), the linkage column (621) passes into the bearing seat (620) and its bevel gear meshes with the lead screw (630), the screw sleeve (631) connects to the moving piece (632), and the end of the lead screw is fixed with the limiting ring (633); During the assembly of the cleaning and coating mechanism, the scraping component (52) is fixed to the mounting bracket (51) through the connecting block (521), the stud (523) and the nut (522); S3. Overall assembly and testing: During final assembly, apply 0.1-0.2mm of thermally conductive silicone oil to the metal plate (2), fix it to the housing (1) with screws (4), and test the drive linkage to ensure that the functional parts move synchronously when the metal plate moves; the testing process includes air tightness test, heat dissipation coefficient test and vibration test. After the test, there is no loosening and the mechanism accuracy deviation is ≤0.5mm.

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