Manual adjustable damping type screen rotating mechanism

Abstract

The utility model relates to a manual adjustable damping type screen rotating mechanism which comprises a base assembly, an adjustable friction damping assembly and a screen bearing support, the adjustable friction damping assembly comprises a main shaft, a friction sleeve, a friction adjusting clamp spring and a damping fixing support, and the friction sleeve and the main shaft provide damping force through contact friction. The friction adjusting clamp spring adjusts the damping force according to the number of stacked installation layers. The screen bearing support is fixedly connected with the main shaft and used for installing a screen. When the screen is manually pushed, the screen bearing support drives the main shaft to rotate in the friction sleeve, the adjustable friction damping assembly provides controllable resistance to prevent the screen from shaking, and the rotation angle can be freely adjusted. The number of parts and the assembly complexity are obviously reduced, and the manufacturing cost and the reject ratio are synchronously reduced; the gear-free transmission design thoroughly eliminates meshing noise, and the service life of a friction pair is greatly prolonged; manual operation in a power-off state is supported, and absolute dependence of a traditional scheme on vehicle power supply is broken through.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle screen structure technical field, concretely relates to a manual adjustable damping formula screen rotating mechanism. BACKGROUND

[0002] Current vehicle screen rotating mechanism generally adopts mechatronics design, but its technical scheme has the following inherent defects:

[0003] Structural redundancy and cost pressure: need to integrate motor, multistage gear set, electric control module and precision transmission parts, the number of parts is much and assembly process is complex, leading to high manufacturing cost;

[0004] Insufficient operation reliability and noise control: gear transmission system is easy to produce operation noise due to mechanical wear, and multistage component cooperation precision requirement is strict, easy to cause positioning deviation or jamming fault;

[0005] Strong function energy dependence: screen rotation completely depends on vehicle power drive, loses the adjusting ability of mechanism under the condition of power failure, cannot satisfy the operation demand of non power supply scene. INVENTION CONTENTS

[0006] Therefore, the utility model provides a manual adjustable damping formula screen rotating mechanism, the number of parts and assembly complexity significantly reduces, manufacturing cost and failure rate synchronously drops down, gear transmission design is completely eliminated to meshing noise, friction pair life is greatly extended, supports manual operation under the condition of power failure, breaks through the absolute dependence of traditional scheme on vehicle power supply.

[0007] The utility model discloses the following technical scheme realizes the purpose:

[0008] A manual adjustable damping formula screen rotating mechanism, including base assembly, adjustable friction damping assembly and screen bearing support, base assembly is used for fixing the mechanism to the installation platform, adjustable friction damping assembly is installed in the base assembly center, including main shaft, friction sleeve, friction adjusting clasp and damping fixed support, the friction sleeve provides damping force with main shaft through contact friction, the friction adjusting clasp adjusts damping force size through the superposition installation layer number, screen bearing support is fixedly connected with main shaft, and is used for installing screen, wherein, when manually pushing screen, the screen bearing support drives main shaft to rotate in the friction sleeve, the adjustable friction damping assembly provides controllable resistance to prevent screen from shaking, and the rotation angle can be freely adjusted.

[0009] The manual adjustable damping type screen rotating mechanism of the scheme realizes a breakthrough improvement in damping adjustment mode through modular function integration and innovation of tribology principle. The core innovation of the adjustable friction damping assembly is to abandon the traditional gear transmission or hydraulic damping scheme, and creatively adopt a rotating friction pair structure, i.e. a high wear-resistant contact surface formed by a main shaft and a friction sleeve, to change the radial holding force of the friction sleeve by adjusting the number of layers of the clamping spring in the axial direction, so as to accurately control the friction damping torque. Compared with the conventional screw adjustment mechanism, the clamping spring layering design can linearly adjust the pressure by increasing or decreasing the number of standard parts, completely eliminates the risk of thread slip failure of the screw pair, and does not need to precisely process the thread matching surface, significantly simplifies the assembly process and reduces the manufacturing cost. The user can manually drive the screen to rotate, and the whole mechanism can provide continuous and stable holding force at any hovering angle. The physical friction damping mechanism fundamentally overcomes the rebounding and shaking and virtual position offset defects of the traditional hinge structure, and is especially suitable for high-frequency angle adjustment scenes of vehicle-mounted display devices.

[0010] Preferably, the base assembly comprises a mounting seat and a support frame, and the mounting seat and the support frame are connected by positioning columns and fasteners.

[0011] The split architecture realizes an optimized balance between function and process. The mounting seat, as the main force-bearing component, is precisely stamped to ensure flatness and structural strength, and the positioning columns distributed on its surface adopt a progressive guide design to automatically correct the positional deviation of the support frame during assembly. The support frame adopts an open grid structure, which significantly reduces material usage while ensuring overall rigidity, in line with the lightweight design trend. The combined fixing method of the positioning columns and the fasteners creates a double locking mechanism: the positioning columns bear the main shear force, avoiding the accumulation of micro-displacement over time; and the fasteners provide elastic pre-tightening force to compensate for the thermal expansion difference of different materials. This design makes the base assembly have both machine-level installation stability and the ability to adapt to a wide temperature range working environment. The modular connection method also brings significant maintenance advantages. When local components need to be replaced, targeted maintenance can be performed without the need for overall disassembly. The honeycomb shock-absorbing pattern designed on the bottom surface of the mounting seat can effectively absorb the slight vibrations during equipment operation, preventing resonance from interfering with the display image.

[0012] Preferably, the friction sleeve is made of polyoxymethylene (POM) material, and the inner wall and the main shaft contact surface form a friction damping interface.

[0013] The material selection reflects the deep combination of tribology and engineering mechanics. The unique self-lubricating properties and moderate friction coefficient of POM can minimize wear rate while ensuring necessary damping force. Its wear resistance is several times that of ordinary engineering plastics. Compared with metal friction pairs, the combination of POM and steel shaft avoids the phenomenon of adhesive wear, and can maintain stable friction characteristics in humid environments. The friction sleeve made by injection molding process can achieve good mirror surface precision on the inner surface, ensuring uniform distribution of the contact area with the main shaft. The material has high thermal stability and high upper limit of continuous use temperature, fully meeting the heat dissipation requirements of electronic equipment. Its low creep rate ensures dimensional stability under long-term pressure. POM has high dielectric strength, which can provide additional electrical insulation protection and prevent static accumulation from interfering with precision electronic components. This material solution strikes the best balance between cost control and performance improvement, effectively reducing manufacturing costs compared to special alloy solutions.

[0014] Preferably, the inner wall of the friction sleeve is provided with circumferentially distributed oil storage grooves for storing lubricating medium to maintain the stability of friction damping.

[0015] The lubricating medium management and friction control are combined innovatively. The annular array of oil storage grooves uses bionics to simulate the synovial membrane structure for long-term lubrication. The groove cross-section is designed as a trapezoidal flow structure, which realizes automatic replenishment of lubricating medium through capillary action, ensuring that the friction interface always maintains the optimal oil film thickness. This design prolongs the periodic oiling maintenance cycle of traditional rotating mechanisms to several years, significantly reducing operating costs. The volume of the oil storage groove is calculated by fluid mechanics, which can accommodate 120% of the volume of the friction interface, and still provide emergency lubrication protection under extreme conditions. The anti-leakage baffle design of the groove edge, combined with the use of high-viscosity silicone-based grease, effectively solves the problem of grease creep in rotating mechanisms. This design also has environmental adaptability advantages. When the equipment is tilted or inverted, the directional distribution of the oil storage groove can still ensure the lubrication supply of the key contact area.

[0016] Preferably, the inner wall of the friction sleeve is provided with lateral adjustment grooves that cooperate with friction adjustment springs to adapt to different damping force adjustment requirements.

[0017] The helical involute layout of the lateral adjustment groove makes the clamping force of the friction adjustment spring present a nonlinear distribution characteristic, providing stronger damping compensation in the key torque range. The groove depth adopts a variable cross-section design, and the root reinforcing rib can withstand a large radial pressure without plastic deformation. This design allows a single set of adjustment grooves to adapt to a variety of different specifications of the spring, significantly improving the universality of the parts. The introduction of the lateral adjustment groove also creates a secondary damping adjustment dimension, allowing users to fine-tune the damping characteristics by changing the axial position of the spring in the groove. This innovative structure upgrades traditional single-plane friction to three-dimensional contact friction, effectively increasing the damping force output per unit volume.

[0018] The oil storage groove on the inner wall of the friction sleeve forms a long-term lubrication system with the lateral adjustment groove, and the self-lubricating gasket ensures that the damping force output remains highly consistent. Users can freely adjust the number of spring layers stacked to achieve personalized adaptation of damping force and operating feel, opening up a new technical path for stepless damping adjustment.

[0019] Preferably, the friction adjustment spring is a sheet-like annular elastic member with an inner diameter that matches the outer diameter of the friction sleeve. By axially stacking different numbers of spring layers, the clamping force on the friction sleeve can be changed.

[0020] The combination application paradigm of mechanical elastic elements is redefined. Each spring is made of bainite spring steel and undergoes vacuum quenching, allowing a single piece to generate greater radial pre-tightening force while maintaining ultra-thin thickness. This ensures uniform distribution of contact stress with the friction sleeve, avoiding material fatigue caused by local overload. The unique open structure allows the spring to be added or removed without completely disassembling the assembly, greatly simplifying the maintenance process.

[0021] Preferably, the adjustable friction damping assembly further includes an axial buffer spring and a self-lubricating gasket. The axial buffer spring is installed on the spindle to eliminate axial displacement, and the self-lubricating gasket is arranged on the upper and lower ends of the axial buffer spring.

[0022] A multi-dimensional dynamic compensation mechanism is constructed. The double-helix buffer spring adopts a variable pitch design, providing linear restoring force within the axial displacement range. The self-lubricating gasket is made of graphite-infiltrated copper-based composite material, with a friction coefficient that decreases adaptively with temperature rise, perfectly matching different working condition requirements. There is no virtual displacement in the axial and rotational directions, and the screen will not shake when the vehicle is driving. This buffer system can compensate for component processing tolerances to some extent, ensuring that the mechanism does not easily move axially after years of use. The specially designed spring pre-load adjustment mechanism allows the axial play to be zeroed and calibrated without disassembling the assembly using a special tool.

[0023] Preferably, the base assembly is made of stamped sheet metal, with flanged reinforcement structures and reinforcing ribs on the surface.

[0024] High unification of light weight and high strength is achieved. The reinforcing rib network designed by a topology optimization algorithm improves the rigidity index of the base assembly while reducing weight. The flanged structure is formed by cold-rolled steel sheet through multi-pass incremental forming, and the edge bending strength is several times that of the base material. The surface micro-texturing process forms a mechanical interlocking effect at the millimeter level, effectively improving the adhesion of the coating. The modular stamping design improves the material utilization of individual components and significantly reduces production costs.

[0025] Preferably, bearings are provided at the upper and lower ends of the main shaft, and the bearings are in interference fit with the base assembly.

[0026] The interference fit interface adopts a taper self-locking principle, and forms a permanent stress ring after assembly, effectively preventing fretting wear. This design breaks through the limitation of traditional shafting that requires regular lubrication, and achieves maintenance-free throughout the life cycle.

[0027] Preferably, the damping fixed bracket and the friction sleeve are fixed by protrusion-groove interference fit and locked to the base assembly by fasteners.

[0028] A multi-stage anti-failure safety mechanism is constructed. The protrusion-groove adopts a hot assembly process to achieve interference fit, forming a certain amount of interference at room temperature to ensure the intermolecular bonding force at the microscopic level. The interference formed can ensure the close combination between the two, achieving reliable connection effect. The assembly has three-dimensional interlaced positioning features, enabling mechanical interlocking in X, Y, and Z directions, with excellent impact resistance and the ability to withstand high levels of impact force.

[0029] The utility model discloses compared with prior art's beneficial effects are:

[0030] System architecture reconstruction: abandon traditional motor, gear set and electric control module, adopt pure mechanical force transmission scheme, and the total number of parts is greatly simplified;

[0031] Friction transmission replaces gear meshing: torque is transmitted through direct contact of the main shaft and the high wear-resistant friction sleeve, eliminating multi-stage transmission error accumulation.

[0032] Stacked radial pressure regulation: axial superimposed clamp spring structure is adopted, and the number of layers of clamp spring is linearly changed to change the friction pair pressure, realizing stepless regulation of damping torque.

[0033] Long-acting lubrication and stability design: the friction sleeve is provided with a lubricating medium storage structure, and a self-lubricating assembly is arranged to ensure the long-term consistency of damping output.

[0034] Low-torque operation design: Based on the lever principle, the force transmission path is optimized, and users can achieve smooth screen rotation by pushing lightly;

[0035] Full-angle free hovering: The physical friction damping mechanism can provide stable holding force at any rotation angle, avoiding the rebound or misalignment problems of traditional hinge structures. Attached Figure Description

[0036] 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.

[0037] Figure 1 This is a structural diagram of a manually adjustable damping screen rotation mechanism according to an embodiment of the present invention.

[0038] Figure 2 This is a structural diagram of a manually adjustable damping screen rotation mechanism according to another embodiment of the present invention.

[0039] Figure 3 This is a structural diagram of an adjustable friction damping component according to an embodiment of the present invention.

[0040] Figure 4 This is an exploded view of an adjustable friction damping component according to an embodiment of the present invention.

[0041] Figure 5 This is a color exploded view of an adjustable friction damping component according to an embodiment of the present invention.

[0042] Labeling description: Base assembly (1), Mounting seat (11), Support frame (12), Flanged reinforcement structure (13), Reinforcing rib (14), Adjustable friction damping assembly (2), Main shaft (21), Friction sleeve (22), Oil reservoir (221), Lateral adjustment groove (222), Friction adjustment snap ring (23), Damping fixing bracket (24), Axial buffer spring (25), Self-lubricating gasket (26), Bearing (27), Screen support bracket (3). Detailed Implementation

[0043] 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.

[0044] Therefore, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the application.

[0045] It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0046] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0047] The technical solutions in the application will be described below with reference to the drawings.

[0048] The embodiment provides a manually adjustable damping type screen rotating mechanism, which comprises a base assembly 1, an adjustable friction damping assembly 2 and a screen bearing support 3. The base assembly 1 is used to fix the mechanism to a mounting table. The adjustable friction damping assembly 2 is installed at the center of the base assembly 1 and comprises a main shaft 21, a friction sleeve 22, a friction adjusting clasp 23 and a damping fixing support 24. The friction sleeve 22 provides damping force through contact friction with the main shaft 21. The friction adjusting clasp 23 adjusts the damping force size by superimposing the installation layers. The screen bearing support 3 is fixedly connected with the main shaft 21 and is used to install a screen. When the screen is manually pushed, the screen bearing support 3 drives the main shaft 21 to rotate in the friction sleeve 22. The adjustable friction damping assembly 2 provides controllable resistance to prevent the screen from shaking, and the rotating angle can be freely adjusted.

[0049] Multi-dimensional function integration is achieved through modular design. The base assembly 1 serves as a basic bearing structure, and a split fixing method is adopted to ensure the rigid connection between the mechanism and the mounting table, and a compatible interface is reserved for the expansion of subsequent components. The core innovation of the adjustable friction damping assembly 2 is to convert traditional linear damping into rotary damping. Stepless damping adjustment is achieved through the contact surface pressure control of the friction sleeve 22 and the main shaft 21. Compared with the gear meshing or hydraulic damping scheme, it has the advantages of compact structure and no mechanical loss. The integrated connection design of the screen bearing bracket 3 and the main shaft 21 ensures the coaxial accuracy during rotation and increases the man-machine interaction torque through the lever principle, so that subtle pushing force can trigger the rotation action. The whole mechanism realizes precise control of damping force through physical tribology principle, and can provide continuous and stable holding force at any rotation angle, completely solving the problems of "rebound shaking" and "virtual offset" existing in traditional hinge structure, and is especially suitable for professional display application scenarios that need to frequently adjust the viewing angle. The laminated design of the friction adjustment clamp spring 23 creates a new paradigm for damping adjustment. Users can personalize the adaptation according to the screen weight distribution characteristics, fundamentally breaking through the range limitation of traditional spring pre-tightening force adjustment, and avoiding the common thread adjustment mechanism risk of thread slipping failure.

[0050] In the embodiment, the base assembly 1 includes a mounting seat 11 and a support frame 12, and the mounting seat 11 and the support frame 12 are connected through positioning columns and fasteners.

[0051] The split architecture realizes the optimal balance of function and process. The mounting seat 11, as the main force-bearing component, is formed by precise stamping to ensure flatness and structural strength. The positioning columns distributed on the surface adopt a progressive guide design, which can automatically correct the positional deviation of the support frame 12 during assembly. The support frame 12 adopts an open grid structure, which ensures overall rigidity while significantly reducing material usage, in line with the lightweight design trend. The combined fixing method of the positioning column and the fastener creates a double locking mechanism: the positioning column bears the main shear force, avoiding the accumulation of micro-displacement over time; the fastener provides elastic pre-tightening force, which can compensate for the thermal expansion difference of different materials. This design makes the base assembly 1 have both the installation stability of a machine tool and the ability to adapt to a wide temperature range working environment. The modular connection method also brings significant maintenance advantages. When local components need to be replaced, targeted maintenance can be performed without the need for overall disassembly. The honeycomb shock-absorbing pattern designed on the bottom surface of the mounting seat 11 can effectively absorb the slight vibrations during equipment operation, preventing resonance from interfering with the display image.

[0052] In the embodiment, the friction sleeve 22 is made of polyoxymethylene material, and the inner wall thereof forms a friction damping interface with the contact surface of the main shaft 21.

[0053] The material selection reflects the deep combination of tribology and engineering mechanics. The unique self-lubricating property and moderate friction coefficient of POM, about μ = 0.1-0.3, can reduce the wear rate to the maximum extent while ensuring the necessary damping force, and its wear resistance is 3-5 times that of ordinary engineering plastics. Compared with metal friction pairs, the cooperation of POM and steel spindle 21 avoids the phenomenon of adhesive wear, and can still maintain stable friction characteristics in humid environment. The friction sleeve 22 made by injection molding process has a mirror surface precision of Ra0.8 on the inner surface, which ensures the uniform distribution of the contact area with the spindle 21. The material has high thermal stability, and the upper limit of continuous use temperature is 110℃, which fully meets the heat dissipation requirements of electronic equipment, and its creep rate is less than 0.5%, which ensures the dimensional stability under long-term pressure. The dielectric strength of POM is about 20kV / mm, which can provide additional electrical insulation protection and prevent static accumulation from interfering with precision electronic components. This material solution has achieved the best balance between cost control and performance improvement, and can effectively reduce the manufacturing cost compared with the special alloy solution.

[0054] In this embodiment, the inner wall of the friction sleeve 22 is provided with circumferentially distributed oil storage grooves 221, which are used to store lubricating medium to maintain the stability of friction damping.

[0055] The lubricating medium management and friction control are combined innovatively. The annular array of oil storage grooves 221 uses bionics principle to simulate the synovial membrane structure to achieve long-acting lubrication. The groove cross-section is designed as a trapezoidal flow guide structure, which realizes automatic replenishment of lubricating medium through capillary action, ensures that the friction interface always maintains the best oil film thickness, about 0.5-2μm. This design prolongs the periodic oiling maintenance period of traditional rotating mechanisms to more than 3 years, greatly reducing the use cost. The volume of the oil storage groove 221 is calculated by fluid mechanics, which can accommodate 120% of the volume of the friction interface of the lubricating grease, and still provide emergency lubrication protection under extreme working conditions. The anti-leakage baffle design of the groove edge, combined with the use of high-viscosity silicon-based lubricating grease, effectively solves the problem of lubricating grease creep in rotating mechanisms. This design also has environmental adaptability advantages. When the equipment is tilted or inverted, the directional distribution of the oil storage groove 221 can still ensure the lubrication supply of the key contact area.

[0056] In this embodiment, the inner wall of the friction sleeve 22 is provided with lateral adjustment grooves 222, which cooperate with the friction adjustment spring 23 to adapt to different damping force adjustment requirements.

[0057] The helical involute layout of the lateral adjustment groove 222 makes the clamping force of the friction adjustment spring 23 present a nonlinear distribution characteristic, providing stronger damping compensation in the key torque range. The groove depth adopts a variable cross-section design, and the root reinforcing rib can withstand a radial pressure of more than 300 N without plastic deformation. This design allows a single set of adjustment grooves to adapt to multiple different specifications of the spring, significantly improving the universality of the components. The introduction of the lateral adjustment groove 222 also creates a secondary damping adjustment dimension, allowing users to fine-tune the damping characteristics by changing the axial position of the spring in the groove. This innovative structure upgrades traditional single-plane friction to three-dimensional contact friction, effectively increasing the damping force output per unit volume.

[0058] In this embodiment, the friction adjustment spring 23 is a sheet-like annular elastic member with an inner diameter that matches the outer diameter of the friction sleeve 22. By axially stacking different numbers of spring layers, the clamping force on the friction sleeve 22 can be changed. It should be noted that the friction adjustment spring 23 is actually a sheet-like structure, and the specific form can be referred to Figure 5 , which is a plurality of sheet-like friction adjustment springs 23 stacked together. Figures 1-4 is a schematic diagram using simplified drawing methods, and for this reason, these figures fail to show the details of the multiple sheet-like friction adjustment springs 23 when stacked.

[0059] The combination application paradigm of mechanical elastic elements is redefined. Each spring is made of bainite spring steel and undergoes vacuum quenching, which can generate greater radial pre-tightening force while maintaining ultra-thin thickness. This ensures uniform distribution of contact stress with the friction sleeve 22, avoiding material fatigue caused by local overload. The unique open structure allows the spring to be added or removed without completely disassembling the assembly, greatly simplifying the maintenance process.

[0060] In this embodiment, the adjustable friction damping assembly 2 also includes an axial buffer spring 25 and a self-lubricating gasket 26. The axial buffer spring 25 is installed on the main shaft 21 to eliminate axial displacement, and the self-lubricating gasket 26 is arranged at the upper and lower ends of the axial buffer spring 25.

[0061] A multi-dimensional dynamic compensation mechanism is constructed. The double-helical buffer spring adopts a variable pitch design, providing a linear restoring force within the axial displacement range. The self-lubricating gasket is made of graphite-infiltrated copper-based composite material, which has the characteristic of adaptively reducing the friction coefficient as the temperature rises, perfectly matching different working conditions. There is no virtual position in the axial and rotational directions, and the screen will not shake when the vehicle is driving. This buffer system can compensate for the assembly processing tolerance to some extent, ensuring that the mechanism does not easily move axially after years of use. The specially designed spring pre-load adjustment mechanism allows the axial play to be zeroed and calibrated without disassembling the assembly through a special tool.

[0062] In the embodiment, the base assembly 1 is made of stamping sheet metal, and the surface is provided with a flange reinforcing structure 13 and a reinforcing rib 14.

[0063] High unification of light weight and high strength is achieved. The reinforcing rib 14 network designed by a topology optimization algorithm improves the rigidity index of the base assembly 1 while reducing weight. The flange structure 13 is formed by cold-rolled steel plate through multi-pass progressive forming, and the edge bending strength is several times that of the base material. The surface micro-texturing process forms a mechanical interlocking effect in the millimeter level thickness, effectively improving the adhesion of the coating. The modular stamping design improves the material utilization rate of individual components and significantly reduces production costs.

[0064] In the embodiment, the main shaft 21 is provided with bearings 27 at the upper and lower ends, and the bearings 27 are interference fit with the base assembly 1.

[0065] The interference fit interface adopts a taper self-locking principle, and forms a permanent stress ring after assembly, effectively preventing fretting wear. This design breaks through the limitation of traditional shafting that requires regular lubrication, and achieves maintenance-free throughout the life cycle.

[0066] In the embodiment, the damping fixed support 24 and the friction sleeve 22 are fixed by convex block-groove interference fit, and are locked to the base assembly 1 by fasteners.

[0067] A multi-stage anti-failure safety mechanism is constructed. The convex block-groove adopts a hot assembly process to achieve interference fit, and forms a certain amount of interference at room temperature to ensure the intermolecular bonding force at the microscopic level. The interference formed can ensure the close combination between the two, achieving reliable connection effect. The assembly has three-dimensional interlaced positioning features, so that it realizes mechanical interlocking in X, Y and Z directions, has excellent impact resistance, and can withstand high levels of impact force.

[0068] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A manually adjustable damped screen rotation mechanism, characterized in that, The utility model relates to a kind of adjustable friction damping mechanism for screen, including Base assembly (1) for fixing the mechanism to mounting table; Adjustable friction damping assembly (2) is installed in the center of the base assembly (1), including main shaft (21), friction sleeve (22), friction adjusting clasp (23) and damping fixed support (24), the friction sleeve (22) provides damping force with main shaft (21) by contact friction, the friction adjusting clasp (23) adjusts damping force size by the number of installation layers of superposition; Screen bearing support (3) is fixedly connected with the main shaft (21), for installing screen; Wherein, when manually pushing screen, the screen bearing support (3) drives main shaft (21) to rotate in friction sleeve (22), the adjustable friction damping assembly (2) provides controllable resistance to prevent screen from shaking, and rotation angle can be freely adjusted.

2. A manually adjustable damped screen rotation mechanism according to claim 1, wherein, The base assembly (1) includes a mounting seat (11) and a support frame (12), and the mounting seat (11) is connected with the support frame (12) by positioning columns and fasteners.

3. The manually adjustable damped screen rotation mechanism of claim 1, wherein, The friction sleeve (22) is made of polyoxymethylene (POM) material, and a friction damping interface is formed between the inner wall of the friction sleeve (22) and the contact surface of the main shaft (21).

4. The manually adjustable damped screen rotation mechanism of claim 1, wherein, The inner wall of the friction sleeve (22) is provided with circumferentially distributed oil storage grooves (221), and the oil storage grooves (221) are used to store lubricating medium to maintain the stability of the friction damping.

5. The manually adjustable damped screen rotation mechanism of claim 1, wherein, The inner wall of the friction sleeve (22) is provided with a lateral adjusting groove (222), which cooperates with the friction adjusting clasp (23) to adapt to different damping force adjusting requirements.

6. The manually adjustable damped screen rotation mechanism of claim 1, wherein, The friction adjusting clasp (23) is a sheet-shaped annular elastic member, and the inner diameter of the friction adjusting clasp (23) is adapted to the outer diameter of the friction sleeve (22). By axially stacking different numbers of clasp layers, the holding force on the friction sleeve (22) can be changed.

7. The manually adjustable damped screen rotation mechanism of claim 1, wherein, The adjustable friction damping assembly (2) further includes an axial buffer spring (25) and a self-lubricating gasket (26), the axial buffer spring (25) is installed on the main shaft (21) to eliminate axial displacement, and the self-lubricating gasket (26) is arranged at the upper and lower ends of the axial buffer spring (25).

8. The manually adjustable damped screen rotation mechanism of claim 1, wherein, The base assembly (1) is made of stamping sheet metal, and the surface is provided with a flanged reinforcing structure (13) and a reinforcing rib (14).

9. The manually adjustable damped screen rotation mechanism of claim 1, wherein, The main shaft (21) is provided with bearings (27) at the upper and lower ends, and the bearings (27) are interference-fitted with the base assembly (1).

10. The manually adjustable damped screen rotation mechanism of claim 1, wherein, The damping fixed support (24) is fixed with the friction sleeve (22) through convex block-groove interference fit, and is locked to the base assembly (1) through fasteners.

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