A manually self-rotating swivel chair

Abstract

The utility model discloses a kind of manual self-rotation rotary chairs, it relates to mechanical engineering and transmission technical field, specifically a kind of manual self-rotation rotary chairs, including chair leg, the chair leg is aluminium alloy material, wall thickness 2.5mm, middle end is fixedly connected with grey sports floor (PVC material, surface pressing depth 1mm's antiskid line) by bolt;The upper end of the shell is rotatably connected with rotary chair operating panel (diameter 300mm, thickness 50mm) by rotating shaft;The upper end of the grey sports floor is fixedly connected annular backrest by epoxy resin glue. By setting separation inner tooth planetary gear set, stacked transmission shaft and speed limiting mechanical gear assembly, the problem that the above background technology proposes is solved, rotation speed is too high, prone to vibration and noise, high temperature or high load working condition is prone to lubricating oil failure.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering and transmission technology, specifically a manually operated self-rotating swivel chair. Background Technology

[0002] Manually operated swivel chairs, as an important component of amusement facilities, office furniture, or medical rehabilitation equipment, have the core function of enabling the seat to rotate freely through manual or semi-automatic means to meet users' needs for flexibility, comfort, and safety.

[0003] However, existing patents have the following drawbacks:

[0004] Traditional swivel chairs (such as carousels) mostly rely on motors or fixed tracks for rotation. Users can only passively receive the rotational motion and cannot adjust the speed or direction according to their needs, resulting in a monotonous user experience and preventing interaction through rotation (such as multiplayer cooperative games). In addition, some manual rotation mechanisms require external force to push, making the speed difficult to control and prone to loss of control due to inertia.

[0005] (2) Existing manual swivel chairs generally lack dynamic speed adjustment devices. When the speed is too high, they can only be stopped by mechanical friction or emergency braking, which has problems such as braking delay and accelerated wear of parts. For example, some products use a fixed threshold braking system, which cannot adjust the braking force in real time according to the load changes, which can easily cause user discomfort or even safety hazards due to sudden stops;

[0006] (3) Traditional planetary gear transmission systems often adopt a multi-stage fixed gear ring design, which leads to structural redundancy, high assembly precision requirements, and increased gear meshing clearance after long-term use, which easily generates vibration and noise. In addition, the lubrication and heat dissipation of the rotating shaft have not been fully optimized, which can easily lead to lubricant failure and component thermal deformation under high temperature or high load conditions, thus shortening the service life.

[0007] (4) Some swivel chairs use hard materials (such as plastic or metal) for their seat panels, which can easily cause discomfort to the user's back or buttocks after prolonged use. At the same time, existing designs focus on the swivel function and lack coordination and adaptation with the user's movements (such as pressure-sensing adaptive adjustment), making it difficult to meet the needs of posture correction or movement assistance in medical rehabilitation. Utility Model Content

[0008] The purpose of this utility model is to provide a manual self-rotating swivel chair, which solves the problems mentioned in the background art, such as vibration and noise caused by excessive rotation speed, and lubricant failure under high temperature or high load conditions, by setting a separate internal planetary gear set, a stacked transmission shaft and a speed-limiting mechanical gear assembly.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a manually operated self-rotating swivel chair, comprising chair legs made of aluminum alloy with a wall thickness of 2.5mm, and a gray sports floor (PVC material with a 1mm deep anti-slip texture pressed onto the surface) fixedly connected to the middle by bolts; a swivel chair control panel (300mm in diameter and 50mm thick) rotatably connected to the upper end of the outer shell via a rotating shaft; and a ring-shaped backrest (elastic mesh material with a mesh density of 18 threads / cm) fixedly connected to the upper end of the gray sports floor by epoxy resin adhesive. 2 The arc is adapted to the S-shaped curve of the human spine; the two ends of the ring backrest are connected to the armrests by rivets (the vertical section is aluminum alloy and the horizontal section is ABS plastic); the lower front end of the ring backrest (4) is connected to the PE seat panel (thickness 3mm, honeycomb ventilation holes with a diameter of 2mm are opened on the surface, and an activated carbon adsorption layer with a thickness of 3mm is pasted underneath).

[0010] The overall structural framework of the swivel chair is clearly defined, and the materials, connection methods, and basic dimensions of each component are specified. This serves as the basis for subsequent more specific claims, defining the basic form and main components of the product.

[0011] Furthermore, a rotating wheel (200mm in diameter, 40mm thick) is fixedly mounted inside the swivel chair control panel via an interference fit; a multi-stage drive shaft (steel, 30mm in diameter, 200mm in length) is coaxially fixedly connected inside the rotating wheel; the lower end of the multi-stage drive shaft passes sequentially through a set of separate internal planetary gears, a rolling bearing (deep groove ball bearing, model 6205), and a pressure bearing (thrust ball bearing, model 51105), and is rotatably connected to the gray sports floor via a bearing seat; the set of separate internal planetary gears contains four equal planetary gears (module 1.5). -2.5, 20 teeth), evenly distributed on the outer circumference of the inner gear ring (module 1.5, 80 teeth), the included angle between the centers of adjacent planetary gears is 90°, and the stacked drive shaft is fixedly installed in the middle of the planetary gears by a flat key; the outer gear ring (module 1.5, 80 teeth) is fixedly connected to the stacked drive shaft by a spline; the outer side of the rolling bearing and the pressure bearing is fitted with a sealing cover (aluminum alloy material, 2mm thick), the sealing cover is fixedly connected to the wheel by screws, and the inner wall is provided with a labyrinth-type sealing groove (depth 2mm, width 3mm), which is filled with high-temperature lithium-based grease (brand name SKF LGHP2).

[0012] This document provides a detailed description of the core transmission structure inside the swivel chair's control panel, including the connection methods, materials, models, and sealing designs of the rotating wheels, cascaded transmission shafts, planetary gear sets, and bearings. It clarifies the transmission principle and key parameters, which are the core technical features for realizing the swivel chair's self-rotation function.

[0013] Furthermore, the outer end of the rotating wheel (150mm in diameter) is connected to a speed limiting pressure plate (20mm thick, with a 0.5mm gap between the inner circumference and the outer circumference of the rotating wheel) via a flange; an annular friction plate (copper-based powder metallurgy material, 3mm thick) is clamped between the speed limiting pressure plate and the rotating wheel; the outer end of the speed limiting pressure plate (180mm in diameter) is fixedly connected to a speed limiting caliper (hydraulic type, with a sintered bronze brake block, 10mm thick) via countersunk screws; the brake block of the speed limiting caliper is adapted to the brake groove (1mm deep, 2mm wide) on the outer circumference of the speed limiting pressure plate, and friction braking is achieved by the brake block moving axially along the brake groove during braking.

[0014] The speed limiting braking structure of the rotary chair is supplemented, and the connection method and material properties of the speed limiting pressure plate, friction plate and speed limiting caliper are clarified. The active control of the rotation speed is achieved through friction braking to ensure the safety of use.

[0015] Furthermore, the internal gear ring of the separate internal planetary gear set is fixedly connected to the rotating wheel via a flat key; the external gear ring is fixedly connected to the stacked transmission shaft via a spline; a speed-limiting mechanical gear assembly (including a driving gear and a driven gear, module 1.5, number of teeth 40) is installed on the outer end (diameter 120mm) of the external gear ring. The driven gear of the speed-limiting mechanical gear assembly meshes with the external gear ring, and the driving gear is connected to a manual adjustment knob. The rotational speed of the external gear ring is limited by adjusting the speed of the driving gear.

[0016] The fixed connection methods between the internal and external gear rings of the planetary gear set and the rotating wheel and the cascaded transmission shaft are clearly defined, as well as the meshing relationship of the speed-limiting mechanical gear assembly. Through mechanical transmission coordination, the rotational speed can be precisely adjusted, thereby improving the stability of the transmission system.

[0017] Furthermore, the inner cavity (10mm in diameter) of the stacked drive shaft is equipped with a temperature sensing valve (bimetallic strip type, operating temperature 80℃); the temperature sensing element (copper, 0.5mm thick) of the temperature sensing valve is embedded inside the aluminum heat dissipation fins (2mm thick, 50mm long, 20mm wide) of the stacked drive shaft; the outer end (40mm in diameter) of the stacked drive shaft is fixedly connected to an aluminum heat dissipation fin, and a spiral oil guide groove (1mm deep, 5mm pitch) is opened along the axial direction on the surface of the heat dissipation fin. The spiral oil guide groove is connected to the oil outlet (2mm in diameter) of the temperature sensing valve, and the other end of the heat dissipation fin is connected to the lubricating oil tank through an oil pipe to form a self-circulating lubrication system.

[0018] This paper describes the heat dissipation and temperature control structure of a stacked drive shaft. Through the design of temperature sensing valve, heat dissipation fins and spiral oil guide groove, the drive shaft achieves self-heating and lubrication, avoids grease failure caused by high temperature, and extends the service life of bearings and drive shaft.

[0019] Furthermore, the planetary gears of the separated internal planetary gear set are four equal cylindrical spur gears with a module of 1.8 (tolerance ±0.05), 20 teeth, and a tooth width of 15mm. The planetary gears are evenly distributed on the outer circumference of the internal gear ring, with the center angle between adjacent planetary gears being 90°. The meshing clearance between the planetary gears and the internal and external gear rings is 0.1-0.2mm, ensuring smooth transmission and low noise.

[0020] Limiting the key parameters of planetary gear sets (module, number of teeth, and distribution angle) to ensure the accuracy, smoothness, and noise control of gear transmission is the core guarantee for the performance of the transmission system.

[0021] Furthermore, the elastic mesh fabric (made of polyester fiber) of the annular backrest has a density of 18 threads / cm. 2 The mesh diameter is 1mm, and the curvature matches the natural curvature of the human spine (C-shape). The backrest height is 500mm and the width is 400mm. The upper surface of the PE seat panel has honeycomb-shaped ventilation holes (hole diameter 2mm, spacing 5mm). An activated carbon adsorption layer (thickness 3mm, iodine value ≥800mg / g) is attached below the ventilation holes to absorb sweat odor and improve riding comfort.

[0022] By limiting the backrest material, density, curvature, and the design of the ventilation holes and absorbent layer on the seat panel, the comfort and hygiene of the swivel chair are optimized, solving the problems of stuffiness and odor in traditional swivel chairs.

[0023] Furthermore, a lifting rod (20mm in diameter, 2mm in wall thickness) is fitted inside the vertical section of the handrail (300mm in height, 50mm in width). The lifting rod is fixed inside the vertical section by M4 locking bolts, and the adjustable height range is 250-350mm. A silicone cushioning pad (Shore hardness 50A, thickness 5-8mm) is fixedly connected to the front end (30mm from the edge) of the horizontal section (200mm in length, 50mm in width). The surface of the cushioning pad has anti-slip texture (0.5mm deep) to prevent the arm from slipping.

[0024] The adjustable structure and cushioning design of the handrails are clearly defined, and the height adjustment function can accommodate users of different heights. The silicone cushioning pads provide soft support, improving the comfort and safety of use.

[0025] Furthermore, the labyrinthine sealing grooves (2mm deep, 3mm wide) on the inner wall of the outer sealing cover (aluminum alloy material) of the rolling bearing and the pressure bearing are filled with high-temperature lithium-based grease (dropping point ≥200℃) to prevent dust and moisture from entering; the upper surface (300mm in diameter) of the swivel chair operating plate is provided with radial anti-slip grooves (1.5mm deep, 10mm apart), and rubber anti-slip pads (1mm thick) are pasted on the bottom of the grooves; a handwheel (80mm in diameter, 20mm thick) is fixedly connected to the outer end of the rotating wheel, and the outer circumference of the handwheel is marked with a rotation direction mark (arrow, font height 5mm, red) and 5 speed limit scale lines (10mm apart, corresponding to speeds of 0-50rpm), and the speed limit scale lines correspond one-to-one with the braking position of the speed limit caliper.

[0026] On the one hand, the sealing protection of the bearing is strengthened by the sealing cover and high-temperature grease, which extends the service life; on the other hand, the anti-slip grooves, direction marks and speed limit scale of the control panel improve the convenience and safety of user operation and avoid misoperation.

[0027] This utility model provides a manually operated self-rotating chair, which has the following beneficial effects:

[0028] High-efficiency transmission and low noise: Utilizing a combination of a discrete internal planetary gear set and a tiered drive shaft, the planetary gears are evenly distributed (module 1.5-2.5), reducing transmission resistance and noise by over 30%; rolling bearings and fittings enhance axial and radial load-bearing capacity, avoiding abnormal noises caused by the clearances of traditional ball bearing structures.

[0029] Intelligent speed limiting and safe braking: The speed limiting pressure plate and speed limiting caliper are linked to achieve dynamic speed limiting through friction plates. When the speed exceeds the threshold, automatic braking is performed to prevent loss of control. The speed limiting mechanical gear assembly meshes with the external gear ring to provide mechanical redundant braking, ensuring double safety.

[0030] Self-heating and temperature control system: The stacked drive shaft has a built-in temperature sensing valve that monitors the temperature in real time and triggers the spiral oil guide groove for automatic lubrication, preventing grease failure due to high temperature; aluminum heat sink fins increase the heat dissipation area, and combined with the forced air cooling design, the operating temperature is reduced by 20℃.

[0031] Ergonomics and comfort optimization: The circular backrest uses elastic mesh fabric (18 threads / cm). 2 The seat conforms to the spine's curve, improving breathability by 50%; the honeycomb ventilation holes (2mm in diameter) on the PE seat panel, combined with the activated carbon adsorption layer, reduce stuffiness; the silicone cushion armrests (5-8mm thick) are height-adjustable to accommodate users of different heights and reduce arm fatigue.

[0032] High stability and durability: The sealing cover uses a labyrinth-style sealing groove (2mm deep) filled with high-temperature lithium-based grease to prevent dust intrusion and extend the bearing life to more than 100,000 cycles; the chair legs and gray sports floor adopt a PVC anti-slip texture design with an anti-slip coefficient ≥0.8 to avoid displacement during rotation. Attached Figure Description

[0033] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0035] Figure 2 This is a plan view of the overall structure of the utility model;

[0036] Figure 3 Cross-sectional view of the transmission system of the utility model;

[0037] Figure 4 Utility model speed limiting braking module diagram;

[0038] Figure 5 Schematic diagram of a utility model heat dissipation and lubrication system.

[0039] The image shows:

[0040] 1. Chair legs; 2. Gray sports flooring; 3. Swivel chair control panel; 4. Circular backrest; 5. Armrests; 6. PE seat panel; 7. Casters; 8. Stacked drive shaft; 9. Separate internal planetary gear set; 10. Rolling bearing; 11. Speed ​​limiting pressure plate; 12. Speed ​​limiting caliper; 13. Pressure bearing; 14. Speed ​​limiting mechanical gear assembly; 15. Internal gear ring; 16. External gear ring; 17. Temperature sensing valve; 18. Aluminum heat dissipation fins; 19. Planetary gear; 20. Spiral oil guide groove. Detailed Implementation

[0041] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0043] Example 1: Medical Rehabilitation Manual Rotating Chair

[0044] Structural Features: Chair Leg 1: Made of aluminum alloy (2.5mm wall thickness), with a medical-grade anti-slip pad (5mm thick, 2mm deep cross-patterned surface) added to the bottom. The middle is fixedly connected to the gray sports floor 2 (PVC material, 1.5mm deep wavy anti-slip patterned surface) by M6 bolts; the upper end of the gray sports floor 2 is connected to the circular backrest 4 (elastic mesh material, 18 threads / cm) by epoxy resin adhesive. 2 The curved backrest conforms to the S-shaped curve of the human spine (with a mesh diameter of 1mm). The two ends of the ring-shaped backrest 4 are connected to the armrests 5 by rivets (the vertical section is made of aluminum alloy, the horizontal section is made of ABS plastic, and the front end is attached with a 3mm thick silicone cushioning pad).

[0045] PE seat panel 6: 3mm thick, with honeycomb-shaped ventilation holes (2mm diameter, 5mm spacing) on ​​the surface, and an activated carbon adsorption layer (3mm thick, iodine value ≥800mg / g) attached underneath. It integrates a pressure sensor (accuracy ±0.5kg) to monitor the patient's weight distribution in real time and provide feedback to the control panel 3.

[0046] Operating panel 3: 300mm in diameter, 50mm in thickness, with a rotating wheel 7 (200mm in diameter, 40mm in thickness) fixedly installed inside. A stacked drive shaft 8 (steel, 30mm in diameter, 200mm in length) is coaxially fixedly connected inside the rotating wheel 7. The lower end of the stacked drive shaft 8 passes through a separate internal gear planetary gear set 9 (four planetary gears 19, module 1.8, number of teeth 20, center included angle 90°), a rolling bearing 10 (deep groove ball bearing 6205), and a pressure bearing 13 (thrust ball bearing 51105) in sequence, and is rotatably connected to the gray sports floor 2 through a bearing seat. The internal gear ring 15 of the separate internal gear planetary gear set 9 is fixed to the rotating wheel 7 by a flat key, and the external gear ring 16 is fixed to the stacked drive shaft 8 by a spline. A speed limiting mechanical gear assembly 14 (drive gear module 1.5, number of teeth 40, meshing with the external gear ring 16) is installed on the outer end of the external gear ring 16.

[0047] Speed ​​limiting braking system: The outer end of the rotating wheel 7 is connected to the speed limiting pressure plate 11 (20mm thick, 0.5mm inner circumferential clearance) via a flange. A copper-based friction plate 15 (3mm thick) is clamped between the speed limiting pressure plate 11 and the rotating wheel 7. The outer end of the speed limiting pressure plate 11 is fixed with a countersunk screw to the speed limiting caliper 12 (hydraulic type, brake block is sintered bronze, 10mm thick). The brake block is adapted to the brake groove (1mm deep, 2mm wide) on the outer circumference of the speed limiting pressure plate 11. The upper surface of the operating disc 3 has radial anti-slip grooves (1.5mm deep, 10mm spacing). A 1mm thick rubber anti-slip pad is pasted on the bottom of the groove. The outer end of the rotating wheel 7 is fixedly connected to the handwheel 10 (80mm diameter, 20mm thick). The outer circumference of the handwheel 10 is marked with a red rotation direction mark (font height 5mm) and 5 speed limiting scale lines (10mm spacing, corresponding to speeds of 0-50rpm). The scale lines correspond one-to-one with the braking position of the speed limiting caliper 12.

[0048] Cooling System: A bimetallic temperature sensing valve 17 (operating temperature 80℃) is installed in the inner cavity (10mm diameter) of the stacked drive shaft 8. The temperature sensing element (copper, 0.5mm thick) is embedded inside the aluminum heat sink fins 18 (2mm thick, 50mm long, 20mm wide). The outer end of the heat sink fins 18 is fixedly connected, and a spiral oil guide groove 20 (1mm deep, 5mm pitch) is opened on the surface, which is connected to the oil outlet (2mm diameter) of the temperature sensing valve 17. The other end of the heat sink fins 18 is connected to the lubricating oil tank through an oil pipe to form a self-circulating lubrication system. A sealing cover (aluminum alloy, 2mm thick) is fitted on the outside of the rolling bearing 10 and the pressure bearing 13. The inner wall of the cover has a labyrinth-type sealing groove (2mm deep, 3mm wide) filled with high-temperature lithium-based grease (dropping point).

[0049] ≥200℃).

[0050] Functional advantages: Medical adaptability: The pressure sensor on the PE seat panel can monitor the patient's center of gravity in real time to prevent rollover; the memory foam filling layer (50mm thick) of the ring-shaped backrest conforms to the spinal curve to improve comfort; the armrests are height adjustable (250-350mm) to accommodate patients of different body types.

[0051] Safety braking: The dual braking system (friction pads + mechanical gears) ensures that the rotation speed is ≤15rpm (safe threshold) to avoid patient discomfort caused by high-speed rotation; the emergency brake button on the control panel (not shown) can lock the rotating wheel 7 with one click, which is convenient for medical staff to intervene.

[0052] Low maintenance: The labyrinthine sealing groove (2mm deep) of the sealing cover 32 effectively prevents dust and water, and high-temperature lithium-based grease lubrication extends the bearing life to more than 100,000 cycles; the self-circulation system of the heat dissipation fins 18 ensures normal lubrication in low-temperature environments and avoids jamming in winter.

[0053] Example 2: Commercial and entertainment type manual swivel chair

[0054] Structural features:

[0055] Chair legs 1: made of aluminum alloy (2.5mm wall thickness), with a detachable counterweight (cast iron, 2kg) added to the bottom. The middle is fixedly connected to the gray sports floor 2 (PVC material, with a 1mm deep grid pattern pressed on the surface) by M6 bolts; the upper end of the gray sports floor 2 is connected to the circular backrest 4 (elastic mesh material, 18 threads / cm) by epoxy resin adhesive. 2 The curved backrest conforms to the S-shaped curve of the human spine (with a 1mm diameter mesh). The two ends of the ring-shaped backrest 4 are connected to the armrests 5 by rivets (the vertical section is made of aluminum alloy, the horizontal section is made of ABS plastic, and the front end is attached with a 5mm thick silicone cushioning pad with anti-slip texture).

[0056] Operation disc 3: 350mm in diameter, 60mm thick, with integrated LED indicator lights (RGB tri-color, light gradually changes when the speed is ≥30rpm). A rotating wheel 7 (220mm in diameter, 45mm thick) is fixedly installed inside. A stacked drive shaft 8 (steel, 32mm in diameter, 220mm in length) is coaxially fixedly connected inside the rotating wheel 7. The lower end of the stacked drive shaft 8 passes sequentially through a set of four separate internal planetary gears 9 (four planetary gears 19, module 2.0, number of teeth 20, center angle 90°), and a roller... The moving bearing 10 (deep groove ball bearing 6206) and the pressure bearing 13 (thrust ball bearing 51106) are rotatably connected to the gray sports floor 2 through bearing seats; the internal gear ring 15 of the separated internal gear planetary gear set 9 is fixed to the rotating wheel 7 by a flat key, and the external gear ring 16 is fixed to the stacked transmission shaft 8 by a spline. The speed limiting mechanical gear assembly 14 (drive gear module 1.5, number of teeth 40, meshing with the external gear ring 16, surface carburizing and quenching treatment, impact resistance increased by 50%) is installed on the outer end of the external gear ring 16.

[0057] Speed ​​limiting braking system: The outer end of the rotating wheel 7 is connected to the speed limiting pressure plate 11 (thickness 25mm, inner circumferential clearance 0.6mm) via a flange. A copper-based friction plate 15 (thickness 4mm) is clamped between the speed limiting pressure plate 11 and the rotating wheel 7. The outer end of the speed limiting pressure plate 11 is fixed with a countersunk screw to the speed limiting caliper 12 (hydraulic type, brake block is sintered bronze, thickness 12mm). The brake block is adapted to the brake groove (depth 1.2mm, width 2.5mm) on the outer circumference of the speed limiting pressure plate 11. The upper surface of the operating disc 3 is provided with radial anti-slip grooves (depth 2mm, spacing 15mm). Rubber anti-slip pads (thickness 2mm) are pasted on the bottom of the grooves. The outer end of the rotating wheel 7 is fixedly connected to the handwheel 10 (diameter 90mm, thickness 25mm). The outer circumference of the handwheel 10 is marked with a red rotation direction mark (font height 6mm) and 5 speed limiting scale lines (spaced 15mm, corresponding to speeds of 0-80rpm). The scale lines correspond one-to-one with the braking position of the speed limiting caliper 12.

[0058] Cooling System: A bimetallic temperature sensing valve 17 (operating temperature 90℃) is installed inside the cascaded drive shaft 8 (diameter 12mm). The temperature sensing element (copper, thickness 0.6mm) is embedded inside the aluminum heat sink fins 18 (thickness 3mm, length 60mm, width 25mm). The outer end of the heat sink fins 18 is fixedly connected, and a spiral oil guide groove 20 (depth 1.5mm, pitch 6mm) is opened on the surface, which is connected to the oil outlet (diameter 3mm) of the temperature sensing valve 17. The other end of the heat sink fins 18 is connected to the lubricating oil tank through an oil pipe to form a self-circulating lubrication system. A sealing cover (aluminum alloy, thickness 3mm) is fitted on the outside of the rolling bearing 10 and the pressure bearing 13. The inner wall of the cover has a labyrinth-type sealing groove (depth 3mm, width 4mm) filled with high-temperature lithium-based grease (dropping point...

[0059] ≥220℃).

[0060] Functional advantages:

[0061] Entertainment and Interactivity: The LED indicator lights (RGB three colors) on the control panel change color with the rotation speed (blue for low speed → green for medium speed → red for high speed), enhancing the user experience; the armrest 5 has a built-in Bluetooth speaker (supports Bluetooth 5.0), which can play music in sync with the rotation rhythm, enhancing the entertainment atmosphere.

[0062] High durability: The external gear ring 16 and the speed limiting mechanical gear assembly 14 are made of carburizing and quenching process (hardness HRC55-60), which increases the impact strength by 50% and supports continuous high-speed operation for 8 hours (speed ≤80rpm); the detachable counterweight (2kg) of the chair leg 1 enhances stability and prevents it from tipping over when rotating at high speed.

[0063] Easy maintenance: The gray sports floor 2 and the circular backrest 4 are connected by snap-fit ​​(disassembly can be completed within 10 seconds), which facilitates transportation and layout adjustment; the large-size design of the heat dissipation fins 18 (60mm in length) improves heat dissipation efficiency and reduces the working temperature by 25℃ in high-temperature environments.

[0064] Example 3: Multifunctional Manual Self-Rotating Chair for Home Use

[0065] Structural Features: Chair Leg 1: Aluminum alloy material (2.5mm wall thickness), with a foldable anti-slip pad (TPU material, 3mm thick, increasing contact area when unfolded) added to the bottom. The middle is fixedly connected to the gray sports floor 2 (PVC material, with shallow textured surface pressing depth of 1mm) by M6 bolts; the upper end of the gray sports floor 2 is connected to the circular backrest 4 (elastic mesh material, mesh density 18 threads / cm) by epoxy resin adhesive. 2 The curved backrest conforms to the S-shaped curve of the human spine (with a 1mm diameter mesh). The circular backrest 4 is connected to the armrests 5 at both ends by rivets (the vertical section is made of aluminum alloy, the horizontal section is made of ABS plastic, and the front end is attached with a 4mm thick silicone cushioning pad with a wavy texture for anti-slip).

[0066] Control panel 3: 320mm in diameter, 55mm thick, with an integrated touch panel (not shown), adjustable seat tilt angle (0-15°); internally fixedly mounted rotating wheel 7 (210mm in diameter, 42mm thick), with a coaxially fixedly connected stacked drive shaft 8 (steel, 31mm in diameter, 210mm in length); the lower end of the stacked drive shaft 8 passes sequentially through a set of four separate internal planetary gears 9 (four planetary gears 19, module 1.9, number of teeth 20, middle... The gear set 9 has a 90° angle between its inner and outer teeth. The inner gear ring 15 is fixed to the rotating wheel 7 by a flat key, and the outer gear ring 16 is fixed to the stacked transmission shaft 8 by a spline. The outer end of the outer gear ring 16 is equipped with a speed limiting mechanical gear assembly 14 (drive gear module 1.5, number of teeth 40, meshing with the outer gear ring 16).

[0067] Speed ​​limiting braking system: The outer end of the wheel 7 is connected to the speed limiting pressure plate 11 (thickness 22mm, inner circumferential clearance 0.55mm) via a flange. A copper-based friction plate 15 (thickness 3.5mm) is clamped between the speed limiting pressure plate 11 and the wheel 7. The outer end of the speed limiting pressure plate 11 is fixed with a countersunk screw to a speed limiting caliper (12) (hydraulic type, brake block is sintered bronze, thickness 11mm). The brake block is adapted to the brake groove (depth 1.1mm, width 2.2mm) on the outer circumference of the speed limiting pressure plate 11. The upper surface of the control panel 3 has radial anti-slip grooves (1.8mm deep, 12mm spacing), and rubber anti-slip pads (1.5mm thick) are pasted on the bottom of the grooves. The outer end of the rotary wheel 7 is fixedly connected to the handwheel 10 (85mm in diameter, 22mm thick). The outer circumference of the handwheel 10 is marked with a red rotation direction mark (font height 5.5mm) and 5 speed limit scale lines (12mm apart, corresponding to speeds of 0-60rpm). The scale lines correspond one-to-one with the braking position of the speed limit caliper 12.

[0068] Cooling system: A bimetallic temperature sensing valve 17 (operating temperature 85℃) is installed in the inner cavity (11mm diameter) of the stacked drive shaft 8. The temperature sensing element (copper, 0.55mm thick) is embedded in the aluminum heat sink fin 18 (2.5mm thick, 55mm long, 22mm wide). The outer end of the heat sink fin 18 is fixedly connected, and a spiral oil guide groove 20 (1.2mm deep, 5.5mm pitch) is opened on the surface, which is connected to the oil outlet (2.5mm diameter) of the temperature sensing valve 17. The other end of the heat sink fin 18 is connected to the lubricating oil tank through an oil pipe to form a self-circulating lubrication system. The rolling bearing 10 and the pressure bearing 13 are covered with a sealing cover (aluminum alloy, 2.5mm thick). The inner wall of the cover is provided with a labyrinth sealing groove (2.5mm deep, 3.5mm wide) and filled with high-temperature lithium-based grease (dropping point ≥210℃).

[0069] Functional advantages:

[0070] Space adaptability: The gray sports floor 2 is quick-removable (snap-on connection) for easy cleaning; the circular backrest 4 is made of elastic mesh fabric (density 18 threads / cm). 2 The adjustable angle (0-15°) adapts to different scenarios such as reading and resting; the silicone cushioning pad (4-8mm thick) on the armrest provides soft support, suitable for daily family use.

[0071] Low-noise operation: The planetary gear 19 of the separate internal planetary gear set 9 has a module of 1.9 (tolerance ±0.05) and a meshing clearance of 0.15mm, with a transmission noise of ≤45dB (better than the 60dB of the traditional swivel chair); the labyrinth-style sealing groove (depth 2.5mm) of the sealing cover 32 effectively isolates dust and reduces friction noise.

[0072] Multi-functional expansion: The touch panel of the control panel can be connected to a mobile APP to record data such as rotation time and heart rate (requires a health monitoring module), and supports Bluetooth synchronization to home smart devices, enhancing the user experience.

[0073] 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 manually operated self-rotating chair, comprising chair legs (1), characterized in that: The middle of the chair leg (1) is connected to a gray sports floor (2), the upper end of the outer shell (1) is connected to a swivel chair control panel (3), the upper end of the gray sports floor (2) is fixedly connected to a ring backrest (4), the two ends of the ring backrest (4) are connected to armrests (5), and one end of the ring backrest (4) is connected to a PE seat panel (6).

2. A manually operated self-rotating chair according to claim 1, characterized in that: The rotating chair control panel (3) has a rotating wheel (7) fixedly installed inside. The rotating wheel (7) is coaxially fixedly connected to a stacked drive shaft (8). The lower end of the stacked drive shaft (8) passes through a set of separate internal gear planetary gears (9), a rolling bearing (10), and a pressure bearing (13) in sequence, and is rotatably connected to the gray sports floor (2).

3. A manually operated self-rotating chair according to claim 2, characterized in that: The outer end of the rotating wheel (7) is connected to a speed limiting pressure plate (11), and a friction plate is provided between the speed limiting pressure plate (11) and the rotating wheel (7). The outer end of the speed limiting pressure plate (11) is fixedly connected to a speed limiting caliper (12), and the brake block of the speed limiting caliper (12) is adapted to the brake groove on the outer periphery of the speed limiting pressure plate (11).

4. A manually operated self-rotating chair according to claim 2, characterized in that: The internal gear ring (15) of the separated internal planetary gear set (9) is fixedly connected to the rotating wheel (7), and the external gear ring (16) is fixedly connected to the stacked transmission shaft (8); a speed-limiting mechanical gear assembly (14) is installed on the outer end of the external gear ring (16), and the speed-limiting mechanical gear assembly (14) meshes with the external gear ring (16).

5. A manually operated self-rotating chair according to claim 2, characterized in that: The inner cavity of the stacked drive shaft (8) is provided with a temperature sensing valve (17), and the temperature sensing element of the temperature sensing valve (17) is embedded in the aluminum heat dissipation fins (18) of the stacked drive shaft (8); the outer end of the stacked drive shaft (8) is fixedly connected with aluminum heat dissipation fins (18), and a spiral oil guide groove (20) is opened on the surface of the heat dissipation fins (18), and the spiral oil guide groove (20) is connected to the oil outlet of the temperature sensing valve (17).

6. A manually operated self-rotating chair according to claim 2, characterized in that: The separate internal planetary gear set (9) includes four equal planetary gears (19), which are evenly distributed on the outer periphery of the internal gear ring (15), and the included angle between the centers of adjacent planetary gears (19) is 90°; a stacked transmission shaft (8) is fixedly installed in the middle of the planetary gears (19), and the module of the planetary gears (19) is 1.5-2.

5.

7. A manually operated self-rotating chair according to claim 1, characterized in that: The circular backrest (4) is made of elastic mesh fabric with a mesh density of 18 threads / cm. 2 The curvature is adapted to the curve of the human spine; the upper surface of the PE seat panel (6) is provided with honeycomb-shaped ventilation holes with a diameter of 2mm, and an activated carbon adsorption layer is provided below the ventilation holes.

8. A manually operated self-rotating chair according to claim 1, characterized in that: The armrest (5) includes a vertical section and a horizontal section that are fixedly connected to the annular backrest (4). A lifting rod is fitted inside the vertical section and the lifting rod is fixed by a locking bolt. A buffer pad is fixedly connected to the front end of the horizontal section. The buffer pad is made of silicone and has a thickness of 5-8mm.

9. A manually operated self-rotating chair according to claim 2, characterized in that: The outer sides of the rolling bearing (10) and the pressure bearing (13) are fitted with sealing covers, which are fixedly connected to the wheel (7); the inner wall of the sealing cover is provided with a labyrinth sealing groove with a depth of 2mm and a width of 3mm, which is filled with high-temperature lithium grease.

10. A manually operated self-rotating chair according to claim 2, characterized in that: The upper surface of the swivel chair operation panel (3) is provided with radial anti-slip grooves with a groove depth of 1.5mm; the outer end of the rotating wheel (7) is fixedly connected to a handwheel (10), and the outer circumference of the handwheel (10) is marked with a rotation direction mark (font height 5mm) and 5 speed limit scale lines, and the speed limit scale lines correspond to the braking position of the speed limit caliper (12).

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