Vehicle-mounted screen driving mechanism and vehicle-mounted screen assembly

Abstract

The utility model relates to a vehicle-mounted screen driving mechanism and a vehicle-mounted screen assembly, the vehicle-mounted screen driving mechanism comprises a driving mechanism shell, a worm transmission part, a pair of driving shaft sleeves and a lining, and the worm transmission part is rotatably arranged in the driving mechanism shell; the pair of driving shaft sleeves are symmetrically arranged at the two ends of the worm transmission part in a sleeving mode and are in clearance fit with the worm transmission part, shaft sleeve mounting grooves are formed in the two sides of the driving mechanism shell, and the driving shaft sleeves are fixedly embedded in the shaft sleeve mounting grooves; the bushing is filled between the axial through hole of the driving shaft sleeve and the end part of the worm transmission part; and the bushing is in interference fit with the worm transmission part. The utility model provides a vehicle-mounted screen driving mechanism and a vehicle-mounted screen assembly, and solves the problems of large occupied space, high cost, expensive maintenance and the like of a traditional driving mechanism through an innovative structural design.

Description

Technical Field

[0001] This utility model relates to the field of vehicle equipment technology, specifically to a vehicle screen driving mechanism and a vehicle screen assembly including the driving mechanism. Background Technology

[0002] With the rapid development of automotive intelligence, in-vehicle screens are playing an increasingly important role in car interiors. To meet users' demands for a better visual experience and more efficient use of interior space, in-vehicle screens are evolving towards thinner, lighter, and larger sizes. However, existing in-vehicle screen driving mechanisms have many problems, hindering their further development.

[0003] Traditional automotive screen drive mechanisms, designed for reverse drive (allowing manual rotation even after power failure), typically employ multiple distributed bearing assemblies to support the transmission components. This design not only occupies significant space, resulting in a bulky drive mechanism that is difficult to integrate into the limited interior space of a vehicle, but also incurs high bearing costs and maintenance expenses. Furthermore, the assembly gaps between the multiple bearing assemblies affect transmission accuracy and are prone to vibration and noise. In addition, the relatively fixed structure of traditional bearings makes further reduction in size difficult, failing to meet the compact design requirements of automotive screens. Moreover, the loose structure and complex heat dissipation paths hinder rapid heat conduction, leading to low overall heat dissipation efficiency. Prolonged operation may result in overheating, affecting performance and lifespan.

[0004] Therefore, there is an urgent need for a new type of vehicle screen driving mechanism that can solve the above problems in order to meet the needs of vehicle screen development. Utility Model Content

[0005] In view of this, the present invention provides a vehicle screen driving mechanism and a vehicle screen assembly, which solves the problems of large space occupation, high cost and expensive maintenance of traditional driving mechanisms through innovative structural design.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A vehicle-mounted screen driving mechanism includes a driving mechanism housing, a worm gear drive, a pair of drive bushings, and a bushing. The worm gear drive is rotatably disposed within the driving mechanism housing. The pair of drive bushings are symmetrically sleeved at both ends of the worm gear drive and are clearance-fitted with the worm gear drive. The driving mechanism housing has bushing mounting grooves on both sides, and the drive bushings are fixedly embedded in the bushing mounting grooves. The bushing fills the space between the axial through hole of the drive bushing and the end of the worm gear drive, and the bushing forms an interference fit with the worm gear drive.

[0008] By integrating the drive bushing and elastic bushing, the inherent size limitations of traditional bearings are overcome, creating a compact transmission architecture with high space utilization. The embedded installation of the bushing and housing eliminates the redundant space of traditional bearing outer rings and positioning flanges. Combined with the self-aligning characteristics of the stepped through-holes, simultaneous optimization of axial and radial dimensions is achieved. The deformation-adaptive capability of the elastic bushing replaces the traditional bearing clearance compensation structure, significantly reducing radial layout space while ensuring transmission accuracy. The integrated design eliminates the assembly gaps of traditional distributed bearing components, allowing the drive mechanism to fit tightly into the vehicle screen hinge system, freeing up more functional layout space in the vehicle cabin. The compact structure simultaneously enhances the efficiency of heat dissipation paths, improving heat transfer efficiency while reducing the overall weight of the mechanism. The modular packaging design allows the drive unit to be directly embedded inside the narrow dashboard, significantly improving maintenance accessibility. This comprehensive improvement in space efficiency provides core support for the development of thinner and larger vehicle screens, while shortening the transmission chain reduces the risks of vibration transmission and electromagnetic interference.

[0009] Preferably, the bushing is made of an elastic material.

[0010] The selection of elastic bushing material achieves a breakthrough improvement in the performance of the transmission interface. The material's high elastic modulus creates a progressive load transfer path, effectively buffering the damage of impact loads to precision transmission components. The viscoelastic energy dissipation mechanism significantly reduces the system's resonance sensitivity and improves dynamic stability. Large deformation capacity provides the system with adaptive fault tolerance under abnormal operating conditions, preventing structural failure through controllable deformation. Wide temperature range retention ensures stable operation from extremely cold to high-temperature environments. Creep resistance guarantees dimensional stability during long-term use, avoiding the risk of loosening associated with traditional materials. Self-lubricating properties reduce reliance on auxiliary lubrication measures while maintaining an ideal coefficient of friction. Nonlinear stiffness characteristics provide the system with inherent mechanical overload protection, achieving intrinsically safe design.

[0011] Preferably, the elastic material is a polymer material.

[0012] The application of polymer materials has revolutionized transmission system materials. The polymer chain structure endows the materials with excellent self-lubricating and wear-resistant properties, significantly improving the durability of transmission interfaces. Multiphase composite technology enables the materials to possess both high strength and elastic recovery capabilities, adapting to complex stress conditions. Chemical inertness ensures long-term stability in chemical environments such as oil and detergents. Optimized thermal performance design ensures an ideal match between the material's coefficient of thermal expansion and metal transmission components, maintaining precise fit over a wide temperature range. Injection molding processes support the precision manufacturing of complex three-dimensional structures, achieving consistency in mass production. Environmentally friendly characteristics meet the sustainable development requirements of the automotive industry and support recycling. Economic advantages are reflected in the dual reduction of raw material costs and production energy consumption, while shortening the manufacturing cycle.

[0013] Preferably, the outer wall of the drive bushing is provided with an anti-rotation plane, and the inner wall of the bushing mounting groove is provided with a limiting plane that cooperates with the anti-rotation plane.

[0014] The anti-rotation planar structure innovatively solves the problem of shaft positioning. Geometric constraints simplify machining processes while ensuring reliable torque transmission, and the planar fit design effectively reduces peak contact stress. Self-alignment improves assembly efficiency and reduces precision adjustment steps. Dual-planar constraints create a stable force flow path, significantly enhancing torsional stiffness. Maintenance-free design eliminates the risk of loosening traditional fasteners, improving long-term reliability. The compact structural design optimizes radial space utilization, creating favorable conditions for the layout of surrounding components. Tolerance-compatible design reduces machining accuracy requirements and improves part interchangeability. Failure-safe design absorbs energy from extreme operating conditions through controlled deformation modes, preventing catastrophic failure.

[0015] Preferably, the axial through hole of the drive bushing has a stepped inner wall structure, which is axially divided to form a transmission component mounting area and a bushing mounting area; the end of the worm gear transmission component is rotatably disposed in the transmission component mounting area, and the bushing fills the bushing mounting area and forms an interference fit with the worm gear transmission component.

[0016] The stepped, partitioned structure pioneers a new solution for multi-functional load-bearing. Axial functional separation design allows for independent optimization of support stiffness and cushioning performance; the transmission component mounting area provides precise radial positioning, while the bushing area focuses on axial displacement compensation. Stiffness gradient design creates an ideal stress distribution pattern, extending the fatigue life of critical components. Optimized lubrication management allows for selection of the best lubrication strategy for different friction pair characteristics. Optimized heat conduction path design effectively controls interface temperature rise, improving continuous operating capability. Assembly guide structure simplifies automated production processes and improves manufacturing consistency. Modular wear management supports partial replacement and maintenance, significantly reducing operating costs. The acoustic impedance gradient structure effectively blocks vibration transmission paths, improving NVH performance.

[0017] Preferably, the inner diameter of the transmission component mounting area of ​​the stepped inner wall structure matches the diameter of the worm gear transmission component, and the inner diameter of the bushing mounting area is larger than the diameter of the worm gear transmission component.

[0018] Precision fit design achieves a fundamental improvement in transmission accuracy. Dimensional matching between the mounting area and the transmission components eliminates the initial backlash of traditional clearance fits, ensuring precise motion transmission. Optimized contact stress distribution significantly improves load uniformity and reduces the risk of localized wear. Enhanced dynamic stability effectively suppresses vibration amplification during transmission. Improved sealing performance forms multiple dust barriers, enhancing environmental adaptability. Thermal expansion coordination design maintains optimal fit under different temperature conditions. A tiered machining strategy reduces overall manufacturing costs while ensuring precision in critical areas. Reliability design significantly extends system lifespan and reduces maintenance requirements.

[0019] Preferably, the inner wall surface of the drive shaft sleeve is provided with a friction-reducing coating, which covers the area in contact with the worm gear transmission component.

[0020] Surface modification technology achieves a qualitative leap in tribological performance. Advanced coating material selection balances the conflicting demands of low friction and high load-bearing capacity, forming ideal friction interface characteristics. Vapor deposition processes ensure the density and bonding strength of the coating structure, significantly improving wear resistance. Enhanced boundary lubrication characteristics enable the system to maintain reliable operation even under lean lubrication conditions. Chemical stability design resists the corrosive effects of various onboard fluids. Thermal stability ensures coating integrity under extreme operating conditions. Life-cycle cost advantages are reflected in extended maintenance intervals and reduced spare parts consumption. Environmental benefits stem from a substantial reduction in lubricant usage, meeting stringent emission standards.

[0021] An in-vehicle screen assembly includes an in-vehicle screen drive mechanism as described above, a screen shaft that is driven by the worm gear drive, and a reduction gear transmission system connected between the worm gear drive and the screen shaft.

[0022] Integrated design drives a comprehensive performance improvement in in-vehicle screen systems. Optimized modular architecture achieves high synergy between drive units and actuators, resulting in industry-leading space utilization efficiency. Precisely matched transmission chain design places mechanical energy transmission efficiency among the highest in its class. Multiple safety protection mechanisms construct a three-dimensional protection system including mechanical torque limiting, elastic buffering, and motion detection. Environmentally sealed design meets protection requirements under harsh operating conditions. Optimized human-machine interface makes manual operation ergonomic. Maintenance-friendly design supports rapid disassembly and module replacement. Electromagnetic shielding design effectively suppresses interference, ensuring compatibility with in-vehicle electronic systems. Standardized interface design supports platform expansion, adapting to diverse product needs.

[0023] Preferably, the reduction gear transmission system includes a worm wheel that rotates synchronously with the worm gear transmission component, and a reduction gear set connecting the worm gear transmission component and the screen rotation shaft.

[0024] The composite drive system achieves an optimal balance between performance and reliability. Optimized gear ratios meet the dynamic characteristics of different screen mechanisms. Tooth profile trimming technology effectively improves meshing smoothness and keeps operating noise at industry-leading levels. Efficiency optimization design minimizes energy loss and improves system energy efficiency. Spatial topology optimization enables a compact layout, providing greater freedom for vehicle design. The thermal management system integrates the advantages of passive and active cooling to ensure continuous high-load operation. A long-life lubrication solution breaks through traditional maintenance cycle limitations, achieving a design lifespan equal to that of the entire vehicle. Safety redundancy design includes dual protection mechanisms: mechanical self-locking and emergency release.

[0025] Preferably, it also includes a drive motor, the output shaft of which is connected to a drive worm gear, which meshes with the worm wheel.

[0026] The integrated innovation of the powertrain system sets a new industry benchmark. The multi-stage transmission design achieves a perfect balance between high torque output and precise control, with dynamic response characteristics reaching industry-leading levels. The energy efficiency management system significantly reduces standby power consumption, meeting the energy-saving requirements of new energy vehicles. The intelligent thermal management solution integrates the advantages of conductive and convective cooling to ensure system thermal stability. Improved control precision supports high-resolution position sensing and closed-loop control, meeting the interactive needs of intelligent cockpits. The electromagnetic compatibility design achieves the highest industry standards through multi-layer filtering and shielding technologies. The functional safety architecture meets the highest safety level certification requirements for automotive electronics, with built-in self-diagnostic and fault protection mechanisms. Standardized communication interfaces support deep integration with the vehicle network, laying the foundation for the expansion of intelligent connected functions.

[0027] Working Principle: When the vehicle screen needs to be adjusted, the power source drives the worm gear transmission to rotate. The rotation of the worm gear transmission is transmitted to the screen's rotating shaft via a reduction gear transmission system, thus causing the screen to rotate accordingly. During this process, the drive bushing and bushing work together. The drive bushing, fixed to the housing, ensures the stability of the entire transmission structure. The bushing's multi-directional buffering mechanism absorbs axial displacement and compensates for tolerances. Simultaneously, the controllable damping characteristics generated by the composite friction system ensure smooth and comfortable operation. In emergency situations requiring manual operation, the operator can easily make manual adjustments based on ergonomic principles. The mechanical torque limiting mechanism monitors and limits torque in real time throughout the process, preventing damage to the equipment due to overload and ensuring system safety.

[0028] The advantages of this utility model compared to the prior art are:

[0029] A pair of drive bushings are symmetrically fitted at both ends of the worm gear transmission component and have a clearance fit with the worm gear transmission component. The drive mechanism housing has bushing mounting grooves on both sides, and the drive bushings are fixedly embedded in these grooves. This embedded installation method, compared to traditional installation methods, eliminates the redundant space occupied by traditional bearing outer rings and positioning flanges, making the entire structure more compact. Simultaneously, the fit between the bushing mounting grooves and the drive bushings also provides a certain positioning function, helping to improve the installation accuracy of the worm gear transmission component.

[0030] The bushing fills the space between the axial through hole of the drive shaft sleeve and the end of the worm gear drive component, forming an interference fit between the bushing and the worm gear drive component. The bushing plays several important roles here. On the one hand, it utilizes its own elastic deformation self-adaptive capability to replace the clearance compensation structure of traditional bearings, significantly reducing the radial layout space while ensuring the transmission accuracy of the worm gear drive component. On the other hand, the interference fit between the bushing and the worm gear drive component effectively fixes the position of the worm gear drive component, preventing axial movement during operation.

[0031] By integrating the drive bushing and elastic bushing, the inherent size limitations of traditional bearings are overcome, creating a compact transmission architecture with high space utilization. Specifically, the embedded installation of the bushing and housing eliminates the redundant space of the traditional bearing outer ring and positioning flange. Combined with the self-aligning characteristics of the stepped through holes (if present), simultaneous optimization of axial and radial dimensions is achieved. The deformation self-adaptive capability of the elastic bushing replaces the traditional bearing clearance compensation structure, significantly reducing radial layout space while ensuring transmission accuracy. The integrated design eliminates the assembly gaps of traditional distributed bearing components, allowing the drive mechanism to fit tightly against the vehicle screen hinge system, freeing up more functional layout space in the vehicle cabin.

[0032] The compact structure simultaneously enhances the efficiency of heat dissipation paths, improving heat transfer efficiency while reducing the overall weight of the mechanism. This is because the compact structure reduces the distance and obstacles for heat transfer, allowing heat to dissipate more quickly, while also reducing unnecessary components and lowering the overall weight of the mechanism.

[0033] The modular packaging design allows the drive unit to be directly embedded inside the narrow dashboard, significantly improving maintenance accessibility. When the drive mechanism fails, unlike traditional mechanisms that require disassembling numerous parts, the modular drive unit can be simply removed from the dashboard for repair or replacement, greatly saving maintenance time and costs.

[0034] The comprehensive improvement in space efficiency provides core support for the development of thinner, lighter, and larger in-vehicle screens, while shortening the drive train reduces the risks of vibration transmission and electromagnetic interference. The reduced space occupied by the drive mechanism makes it possible to optimize the size and thickness of the in-vehicle screen, and the shorter drive train effectively suppresses vibration and electromagnetic interference during transmission, improving the stability and reliability of the in-vehicle screen's operation. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a structural diagram of a vehicle screen assembly according to an embodiment of the present invention.

[0037] Figure 2 for Figure 1 A magnified view of region A in the middle.

[0038] Figure 3 This is a partial exploded view of a vehicle screen driving mechanism according to an embodiment of the present invention.

[0039] Labeling Explanation: Drive mechanism housing - 100, bushing mounting groove - 110, limiting plane - 111, worm gear drive component - 200, worm wheel - 210, drive bushing - 300, axial through hole - 310, transmission component mounting area - 311, bushing mounting area - 312, anti-rotation plane - 320, bushing - 400, screen rotating shaft - 500, reduction gear transmission system - 600, drive motor - 700, drive worm - 710. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0042] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of this application, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this application 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 application.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0044] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0045] This embodiment provides an in-vehicle screen assembly, including an in-vehicle screen drive mechanism, a screen shaft 500 that is connected to a worm gear drive 200, and a reduction gear transmission system 600 connected between the worm gear drive 200 and the screen shaft 500.

[0046] Integrated design drives a comprehensive performance improvement in in-vehicle screen systems. Optimized modular architecture achieves high synergy between drive units and actuators, resulting in industry-leading space utilization efficiency. Precisely matched transmission chain design places mechanical energy transmission efficiency among the highest in its class. Multiple safety protection mechanisms construct a three-dimensional protection system including mechanical torque limiting, elastic buffering, and motion detection. Environmentally sealed design meets protection requirements under harsh operating conditions. Optimized human-machine interface makes manual operation ergonomic. Maintenance-friendly design supports rapid disassembly and module replacement. Electromagnetic shielding design effectively suppresses interference, ensuring compatibility with in-vehicle electronic systems. Standardized interface design supports platform expansion, adapting to diverse product needs.

[0047] The vehicle screen driving mechanism includes a driving mechanism housing 100, a worm gear drive 200, a pair of drive bushings 300, and a bushing 400. The worm gear drive 200 is rotatably disposed within the driving mechanism housing 100. The pair of drive bushings 300 are symmetrically sleeved at both ends of the worm gear drive 200 and are clearance-fitted with the worm gear drive 200. The driving mechanism housing 100 has bushing mounting grooves 110 on both sides, and the drive bushings 300 are fixedly embedded in the bushing mounting grooves 110. The bushings 400 fill the space between the axial through hole 310 of the drive bushings 300 and the end of the worm gear drive 200, and the bushings 400 and the worm gear drive 200 form an interference fit.

[0048] By integrating the drive bushing and elastic bushing, the inherent size limitations of traditional bearings are overcome, creating a compact transmission architecture with high space utilization. The embedded installation of the bushing and housing eliminates the redundant space of traditional bearing outer rings and positioning flanges. Combined with the self-aligning characteristics of the stepped through-holes, simultaneous optimization of axial and radial dimensions is achieved. The deformation-adaptive capability of the elastic bushing replaces the traditional bearing clearance compensation structure, significantly reducing radial layout space while ensuring transmission accuracy. The integrated design eliminates the assembly gaps of traditional distributed bearing components, allowing the drive mechanism to fit tightly into the vehicle screen hinge system, freeing up more functional layout space in the vehicle cabin. The compact structure simultaneously enhances the efficiency of heat dissipation paths, improving heat transfer efficiency while reducing the overall weight of the mechanism. The modular packaging design allows the drive unit to be directly embedded inside the narrow dashboard, significantly improving maintenance accessibility. This comprehensive improvement in space efficiency provides core support for the development of thinner and larger vehicle screens, while shortening the transmission chain reduces the risks of vibration transmission and electromagnetic interference.

[0049] In this embodiment, the bushing 400 is made of an elastic material.

[0050] The selection of 400 elastic bushing material achieves a breakthrough improvement in transmission interface performance. The material's high elastic modulus creates a progressive load transfer path, effectively buffering the damage of impact loads to precision transmission components. The viscoelastic energy dissipation mechanism significantly reduces system resonance sensitivity and improves dynamic stability. Large deformation capacity provides the system with adaptive fault tolerance under abnormal operating conditions, preventing structural failure through controllable deformation. Wide temperature range retention ensures stable operation from extremely cold to high-temperature environments. Creep resistance guarantees dimensional stability during long-term use, avoiding the risk of loosening associated with traditional materials. Self-lubricating properties reduce reliance on auxiliary lubrication measures while maintaining an ideal coefficient of friction. Nonlinear stiffness characteristics provide the system with inherent mechanical overload protection, achieving intrinsically safe design.

[0051] In this embodiment, the elastic material is a polymer material.

[0052] The application of polymer materials has revolutionized transmission system materials. The polymer chain structure endows the materials with excellent self-lubricating and wear-resistant properties, significantly improving the durability of transmission interfaces. Multiphase composite technology enables the materials to possess both high strength and elastic recovery capabilities, adapting to complex stress conditions. Chemical inertness ensures long-term stability in chemical environments such as oil and detergents. Optimized thermal performance design ensures an ideal match between the material's coefficient of thermal expansion and metal transmission components, maintaining precise fit over a wide temperature range. Injection molding processes support the precision manufacturing of complex three-dimensional structures, achieving consistency in mass production. Environmentally friendly characteristics meet the sustainable development requirements of the automotive industry and support recycling. Economic advantages are reflected in the dual reduction of raw material costs and production energy consumption, while shortening the manufacturing cycle.

[0053] In this embodiment, the outer wall of the drive bushing 300 is provided with an anti-rotation plane 320, and the inner wall of the bushing mounting groove 110 is provided with a limiting plane 111 that cooperates with the anti-rotation plane 320.

[0054] The anti-rotation planar 320 structure innovatively solves the problem of shaft positioning. Geometric constraints simplify machining processes while ensuring reliable torque transmission, and the planar fit design effectively reduces peak contact stress. Self-alignment improves assembly efficiency and reduces precision adjustment steps. Dual-planar constraints create a stable force flow path, significantly enhancing torsional stiffness. Maintenance-free design eliminates the risk of loosening traditional fasteners, improving long-term reliability. The compact structural design optimizes radial space utilization, creating favorable conditions for the layout of surrounding components. Tolerance-compatible design reduces machining accuracy requirements and improves part interchangeability. Failure-safe design absorbs energy from extreme operating conditions through controlled deformation modes, preventing catastrophic failure.

[0055] In this embodiment, the axial through hole 310 of the drive bushing 300 has a stepped inner wall structure, which is axially divided to form a transmission component mounting area 311 and a bushing mounting area 312; the end of the worm gear transmission component 200 is rotatably disposed in the transmission component mounting area 311, and the bushing 400 fills the bushing mounting area 312 and forms an interference fit with the worm gear transmission component 200.

[0056] The stepped, partitioned structure pioneers a new solution for multi-functional load-bearing. The axial functional separation design allows for independent optimization of support stiffness and cushioning performance; the transmission component mounting area 311 provides precise radial positioning, while the bushing area focuses on axial displacement compensation. The stiffness gradient design creates an ideal stress distribution pattern, extending the fatigue life of critical components. Optimized lubrication management allows for the selection of the best lubrication strategy for different friction pair characteristics. Optimized heat conduction path design effectively controls interface temperature rise, improving continuous operating capability. The assembly guide structure simplifies automated production processes and improves manufacturing consistency. Modular wear management supports partial replacement and maintenance, significantly reducing operating costs. The acoustic impedance gradient structure effectively blocks vibration transmission paths, improving NVH performance.

[0057] In this embodiment, the inner diameter of the transmission component mounting area 311 of the stepped inner wall structure matches the diameter of the worm gear transmission component 200, and the inner diameter of the bushing mounting area 312 is larger than the diameter of the worm gear transmission component 200.

[0058] Precision fit design achieves a fundamental improvement in transmission accuracy. The dimensional matching between the transmission component mounting area 311 and the transmission component 200 eliminates the initial backlash of traditional clearance fits, ensuring precise motion transmission. Optimized contact stress distribution significantly improves load uniformity and reduces the risk of localized wear. Enhanced dynamic stability effectively suppresses vibration amplification during transmission. Improved sealing performance forms multiple dust barriers, enhancing environmental adaptability. Thermal expansion coordination design maintains optimal fit under different temperature conditions. A graded machining strategy reduces overall manufacturing costs while ensuring accuracy in critical areas. Reliability design significantly extends system lifespan and reduces maintenance requirements.

[0059] In this embodiment, the inner wall surface of the drive shaft sleeve 300 is provided with a friction-reducing coating, which covers the area in contact with the worm gear transmission component 200.

[0060] Surface modification technology achieves a qualitative leap in tribological performance. Advanced coating material selection balances the conflicting demands of low friction and high load-bearing capacity, forming ideal friction interface characteristics. Vapor deposition processes ensure the density and bonding strength of the coating structure, significantly improving wear resistance. Enhanced boundary lubrication characteristics enable the system to maintain reliable operation even under lean lubrication conditions. Chemical stability design resists the corrosive effects of various onboard fluids. Thermal stability ensures coating integrity under extreme operating conditions. Life-cycle cost advantages are reflected in extended maintenance intervals and reduced spare parts consumption. Environmental benefits stem from a substantial reduction in lubricant usage, meeting stringent emission standards.

[0061] In this embodiment, the reduction gear transmission system 600 includes a worm wheel 210 that rotates synchronously with the worm gear transmission component 200, and a reduction gear set connecting the worm gear transmission component 200 and the screen rotating shaft 500.

[0062] The composite drive system achieves an optimal balance between performance and reliability. Optimized gear ratios meet the dynamic characteristics of different screen mechanisms. Tooth profile trimming technology effectively improves meshing smoothness and keeps operating noise at industry-leading levels. Efficiency optimization design minimizes energy loss and improves system energy efficiency. Spatial topology optimization enables a compact layout, providing greater freedom for vehicle design. The thermal management system integrates the advantages of passive and active cooling to ensure continuous high-load operation. A long-life lubrication solution breaks through traditional maintenance cycle limitations, achieving a design lifespan equal to that of the entire vehicle. Safety redundancy design includes dual protection mechanisms: mechanical self-locking and emergency release.

[0063] In this embodiment, a drive motor 700 is also included. The output shaft of the drive motor 700 is connected to a drive worm 710, which meshes with a worm wheel 210.

[0064] The integrated innovation of the powertrain system sets a new industry benchmark. The multi-stage transmission design achieves a perfect balance between high torque output and precise control, with dynamic response characteristics reaching industry-leading levels. The energy efficiency management system significantly reduces standby power consumption, meeting the energy-saving requirements of new energy vehicles. The intelligent thermal management solution integrates the advantages of conductive and convective cooling to ensure system thermal stability. Improved control precision supports high-resolution position sensing and closed-loop control, meeting the interactive needs of intelligent cockpits. The electromagnetic compatibility design achieves the highest industry standards through multi-layer filtering and shielding technologies. The functional safety architecture meets the highest safety level certification requirements for automotive electronics, with built-in self-diagnostic and fault protection mechanisms. Standardized communication interfaces support deep integration with the vehicle network, laying the foundation for the expansion of intelligent connected functions.

[0065] 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 vehicle-mounted screen driving mechanism, characterized in that, include Drive mechanism housing (100); The worm gear transmission component (200) is rotatably disposed within the drive mechanism housing (100); A pair of drive bushings (300) are symmetrically sleeved at both ends of the worm gear transmission component (200) and are clearance-fitted with the worm gear transmission component. The drive mechanism housing (100) has bushing mounting grooves (110) on both sides, and the drive bushings (300) are fixedly embedded in the bushing mounting grooves (110). A bushing (400) is filled between the axial through hole (310) of the drive bushing (300) and the end of the worm gear drive component, and the bushing (400) and the worm gear drive component form an interference fit.

2. The vehicle-mounted screen driving mechanism according to claim 1, characterized in that, The bushing (400) is made of an elastic material.

3. The vehicle-mounted screen driving mechanism according to claim 2, characterized in that, The elastic material is a polymer material.

4. The vehicle-mounted screen driving mechanism according to claim 1, characterized in that, The outer wall of the drive bushing (300) is provided with an anti-rotation plane (320), and the inner wall of the bushing mounting groove (110) is provided with a limiting plane (111) that cooperates with the anti-rotation plane (320).

5. The vehicle-mounted screen driving mechanism according to claim 1, characterized in that, The axial through hole (310) of the drive bushing (300) has a stepped inner wall structure, which is axially divided to form a transmission component mounting area (311) and a bushing mounting area (312); the end of the worm gear transmission component (200) is rotatably disposed in the transmission component mounting area (311), and the bushing (400) fills the bushing mounting area (312) and forms an interference fit with the worm gear transmission component (200).

6. The vehicle-mounted screen driving mechanism according to claim 5, characterized in that, The inner diameter of the transmission component mounting area (311) of the stepped inner wall structure matches the diameter of the worm gear transmission component (200), and the inner diameter of the bushing mounting area (312) is larger than the diameter of the worm gear transmission component (200).

7. The vehicle-mounted screen driving mechanism according to claim 1, characterized in that, The inner wall surface of the drive bushing (300) is provided with a friction-reducing coating, which covers the area in contact with the worm gear transmission (200).

8. A vehicle-mounted screen assembly, characterized in that, include The vehicle screen driving mechanism as described in any one of claims 1-7; The screen hinge (500) is connected to the worm gear transmission component (200) for transmission. A reduction gear transmission system (600) is connected between the worm gear transmission component (200) and the screen rotating shaft (500).

9. The vehicle screen assembly according to claim 8, characterized in that, The reduction gear transmission system (600) includes a worm wheel (210) that rotates synchronously with the worm gear transmission (200), and a reduction gear set connecting the worm gear transmission (200) and the screen rotating shaft (500).

10. The vehicle screen assembly according to claim 9, characterized in that, It also includes a drive motor (700), the output shaft of which is connected to a drive worm (710), which meshes with the worm wheel (210).

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