Intelligent seat adjustment device and method

Abstract

The application discloses a kind of intelligent adjusting device and method of seat, it is related to intelligent seat technical field, including support unit, the rear side of the support unit is welded with rear side fixed frame, the middle part of the rear side fixed frame is rotatably connected with second transmission rod, backrest frame is rotatably arranged on the second transmission rod, the left and right sides of the bottom of the backrest frame are provided with limiting unit, the upper portion of the support unit is welded with positioning unit, the middle part of the positioning unit is slidably with down pressure unit.The application is used when user seats, down pressure cylinder generates vertical displacement under human body pressure, is sequentially driven by rack plate, first gear, bevel gear set, second gear, third gear, and the angle adjustment of backrest frame is completed by the synchronous drive of second transmission rod, can be automatically completed attitude adaptation according to the weight of passenger, seat posture, corresponding seat posture can be matched for different groups of people such as thin, normal, heavy etc.

Description

Technical Field

[0001] This invention relates to the field of intelligent seat technology, and in particular to an intelligent seat adjustment device and method. Background Technology

[0002] Smart seats, as modern mechatronic devices, are widely used in passenger cars, commercial vehicles, offices, cinemas, and construction machinery, serving as core components for enhancing the driving and working experience. Currently, most conventional smart seats on the market employ independent adjustment structures, with the seat cushion, backrest, and support structure separated. They can only be adjusted manually, allowing for individual adjustments to the backrest angle or seat height, and cannot dynamically adapt to the occupant's weight, body shape, and sitting posture. When occupants of different sizes and weights use the same seat, the seat posture cannot be adapted accordingly, easily leading to problems such as excessive pressure in certain areas and unreasonable support points, resulting in a poor overall riding experience.

[0003] Currently, traditional seat adjustment mechanisms are structurally simple, generally lacking a linkage design between seat cushion pressure and backrest angle adjustment, resulting in a relatively mechanical adjustment method. Occupants can only manually complete each adjustment step by step, a cumbersome process with limited adjustment levels, making it difficult to accurately match the ergonomic needs of different people. For users with varying body types (overweight, underweight, or significant height differences), the seat cannot automatically optimize pressure distribution, easily leading to concentrated pressure on the buttocks, unsupported lumbar spine, and insufficient back support. Prolonged sitting can easily cause fatigue, soreness, and other discomfort. Traditional seats have significant shortcomings in self-adaptability and seating comfort. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a seat intelligent adjustment device and method, comprising a support unit, a rear fixing frame welded to the rear side of the support unit, a second transmission rod rotatably connected to the middle of the rear fixing frame, a backrest frame rotatably mounted on the second transmission rod, and limit units provided on the left and right sides of the bottom of the backrest frame, the limit units being fixedly connected to the left and right rear ends of the rear fixing frame respectively; a positioning unit welded to the upper part of the support unit, a pressing unit sliding up and down in the middle of the positioning unit, and a transmission unit provided at the bottom of the positioning unit and the rear side of the rear fixing frame; an installation unit provided at the bottom of the support unit, a limit cylinder welded to the middle of the upper end of the installation unit, and a self-locking unit provided at the front side of the limit cylinder; The transmission unit includes a first transmission rod symmetrically arranged on the left and right sides and a second connecting frame fixedly connected to the middle of the rear end of the rear fixed frame. The front end of each of the first transmission rods is fixedly connected to a first gear, and the rear end of each of the first transmission rods is fixedly connected to a parallel bevel gear. The left and right ends of the front side of the second connecting frame are fixedly connected to rotating sleeves. A third transmission rod is rotatably arranged in the middle of the rotating sleeve. The left and right ends of the third transmission rod are fixedly connected to vertical bevel gears, and the vertical bevel gears mesh with the corresponding parallel bevel gears. A third gear is fixedly connected to the middle of the second transmission rod, and a second gear is fixedly connected to the middle of the third transmission rod, with the second gear meshing with the third gear; The support unit includes a seat cushion support frame, the limiting unit includes a limiting member, the positioning unit includes a fixing plate, and the pressing unit includes a pressing cylinder.

[0005] Preferably, parallel frames are welded to the upper front and rear sides of the seat support frame, and connecting rods are welded to the left and right ends of the inner side of the parallel frames. The inner end of the connecting rod is welded to the four corners of the fixed plate. The bottom left and right sides of the backrest frame are provided with first mounting holes, and the left and right ends of the second transmission rod are respectively fixedly connected to the inner side of the corresponding first mounting holes.

[0006] Preferably, a sleeve is welded to the middle of the fixed plate, and the lower pressure cylinder is slidably connected to the inner side of the sleeve; a support plate is welded to each of the four corners of the upper end of the lower pressure cylinder, and a plurality of springs are equidistantly arranged at the bottom end of the support plate, and the bottom ends of the plurality of springs are engaged with the upper part of the fixed plate. The front left and right ends of the second connecting frame are each welded with a connecting square steel, which is fixedly connected to the rear of the rear fixing frame.

[0007] Preferably, rack plates are welded to both the left and right ends of the outer side of the lower pressure cylinder, and the rack plates mesh with the corresponding first gears respectively; The bottom end of the fixed plate is fixedly connected to the guide frame by bolts on both the front and rear sides. The guide frame is provided with a rotating bearing on the left and right ends of the inner side. The first transmission rod rotates in the corresponding rotating bearing. The pressure cylinder is slidably connected to the inside of the limiting cylinder.

[0008] Preferably, the limiting members are respectively disposed on the left and right ends of the rear side of the rear fixing frame, and a first displacement groove is provided in the middle of each limiting member. A first limiting pin is provided on the left and right ends of the inner side of the backrest frame, and the first limiting pin is slidably connected to the inner side of the corresponding first displacement groove. The bottom end of each limiting member is welded with a first connecting frame, which is fixedly connected to the left and right rear sides of the rear fixing frame by bolts; a first fixing rod is provided on the inner side of each limiting member, and a second mounting hole is provided on the front and upper parts of each limiting member. The upper end of the first fixing rod is welded with a second fixing rod. The upper ends of the first fixing rod and the second fixing rod are respectively inserted into the inner side of the corresponding second mounting hole and fixed with nuts. The bottom end of the first fixing rod is respectively inserted into the left and right sides of the rear fixing bracket and fixed with nuts.

[0009] Preferably, the limiting cylinder has slots on both the left and right sides and a rotating rod is welded thereon; the self-locking unit includes a pull rod, and a handle is welded to the rear end of each pull rod. The rear end of each handle is rotatably connected to the outer side of the corresponding rotating rod, and a torsion spring is fitted to the outer side of each rotating rod. Mounting plates are welded to the left and right sides of the bottom of the lower cylinder, and the mounting plates are slidably connected to the corresponding slots. A second toothed plate is welded to the front side of each mounting plate. A vertical rod is threaded to the upper part of the limiting cylinder. A parallel rod is welded to the upper end of the vertical rod. A first toothed plate is rotatably mounted on the left and right ends of the parallel rod. The first toothed plate engages with the corresponding second toothed plate. The outer side of the first toothed plate is fixedly connected with a second limiting pin, and the middle of the pull handle is provided with a second displacement groove. The second limiting pin is slidably connected to the inner side of the corresponding second displacement groove.

[0010] Preferably, the installation unit includes a base frame, and slots are provided at all four corners of the base frame; welding rods are welded to all four corners of the bottom end of the seat support frame, and snap-fit ​​blocks are welded to the inner side of each welding rod, with snap-fit ​​grooves provided on each snap-fit ​​block, and each snap-fit ​​groove engaging with the corresponding slot.

[0011] Preferably, the upper left and right ends of the rear side of the rear fixing frame are provided with limit blocks, and each limit block is provided with a limit groove.

[0012] A method for intelligent seat adjustment, applied to the aforementioned intelligent seat adjustment device, includes the following steps; S1. Overall Installation of the Device: During the equipment assembly stage, the base frame of the installation unit is first placed in the installation position. The base frame has slots at the four corners. The bottom of the support unit's seat support frame is welded with a welding rod. The inside of the welding rod is fixed with a snap-fit ​​block. The snap-fit ​​block has a snap-fit ​​groove. After the snap-fit ​​grooves are engaged and aligned with each other, bolts and nuts are used to lock them in place, thus achieving a stable assembly of the support unit and the installation unit. The limit cylinder is welded and fixed to the middle of the upper end of the base frame.

[0013] S2. Unlocking Operation: Before use, pull the lever to drive the handle at the rear to rotate outward around the rotating rod. A torsion spring is mounted on the outside of the rotating rod. At this time, the torsion spring is charged. During the rotation of the handle, the second displacement groove on it will drive the second limit pin to move synchronously, thereby driving the first toothed plate to flip forward around the parallel rod, so that the teeth between the first toothed plate and the second toothed plate are completely disengaged, thus releasing the position lock of the lower pressure cylinder. S3. Seating Pressure and Adaptive Displacement of the Pressing Unit: When the user sits down, the weight of the body acts on the support plate at the top of the pressing unit. The support plate presses down on the spring at the bottom. Due to the difference in weight of different users, the spring undergoes different degrees of compression deformation, which drives the pressing cylinder to slide down along the sleeve in the middle of the fixed plate and inside the limiting cylinder, realizing adaptive adjustment of the pressing displacement. The mounting plate at the bottom of the pressing cylinder slides vertically along the slots on both sides of the limiting cylinder. S4. Automatic adjustment of backrest angle: When the pressure cylinder moves downward, the rack plates fixed on both sides move downward synchronously. The rack plates mesh with the first gear to drive the first transmission rod to rotate as a whole. The parallel bevel gear at the rear end of the first transmission rod rotates accordingly and meshes with the vertical bevel gear to drive it to rotate. This causes the third transmission rod between the two vertical bevel gears to rotate synchronously. The second gear in the middle of the third transmission rod rotates accordingly and further meshes with the third gear to drive it to rotate. The third gear is fixed in the middle of the second transmission rod. Therefore, the second transmission rod rotates synchronously, causing the backrest frame mounted on it to flip and tilt backward around the second transmission rod as the axis. The first limiting pin on the inner side of the backrest frame slides in the first displacement groove of the limiting member. The limiting unit guides and limits the movement trajectory of the backrest frame. At the same time, the limiting block and limiting groove above the rear fixed frame can provide the ultimate limit for the backrest frame. S5. Automatic locking and positioning: When the user is seated and stable, and the backrest angle is adjusted to the appropriate position, the pull rod is released, the torsion spring releases its stored force and drives the pull handle to reset. The pull handle drives the first locking plate to return to its original position through the second displacement groove and the second limit pin, so that the first locking plate re-engages with the second locking plate in the current position. The locking teeth engage to lock the vertical position of the pressing cylinder, preventing the pressing unit from rebounding, and then locking the second transmission rod and the backrest frame through the entire transmission mechanism.

[0014] In summary, the present invention provides a seat intelligent adjustment device and method, which has the following beneficial effects: 1. When the user sits down, the downward pressure cylinder undergoes vertical displacement due to the pressure of the human body. This displacement is transmitted step by step through the rack, first gear, bevel gear set, second gear, and third gear, synchronously driving the second transmission rod to adjust the angle of the backrest frame. No manual operation of the backrest is required. The backrest can automatically adapt to the posture according to the occupant's weight and sitting posture, matching the corresponding seat posture for different groups of people, such as thin, normal, and heavy. The elastic support structure composed of support plate and spring can disperse local pressure on the buttocks, avoiding local pressure soreness. At the same time, the displacement of the downward pressure cylinder is linked to the synchronous deflection of the backrest frame. With the guiding and limiting effect of the limiting unit, the backrest conforms to the curve of the human spine, reducing the phenomenon of lumbar vertebrae being unsupported. The sleeve and the limiting cylinder form a double guide to ensure smooth downward movement. The thigh support length is optimized synchronously with the overall posture, improving the spinal fit.

[0015] 2. This invention addresses the issue by increasing spring compression and extending the downward distance of the lowering cylinder for heavier occupants, automatically lowering the overall seating posture. Simultaneously, the gear transmission mechanism drives the backrest frame to rotate backward at a greater angle. For lighter occupants, the spring deformation is smaller, resulting in a higher seating posture and a more upright backrest. Combined with the stroke limitation of the first limiting pin and the first displacement groove, this ensures balanced force distribution for users of different weights. The dual stroke limiting structure, consisting of limiting components and blocks, restricts the maximum tilt angle of the backrest frame, eliminating the risk of overtravel. After seating adjustment, the first and second locking plates in the self-locking unit engage to lock the lowering cylinder, thereby locking the entire transmission mechanism and backrest posture. The torsion spring automatically resets the unlocking components, making operation simple. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the right front side of the intelligent seat adjustment device and method of the present invention; Figure 2 This is a three-dimensional structural diagram of the left rear side of the intelligent seat adjustment device and method of the present invention; Figure 3 This is a three-dimensional structural diagram of the backrest frame and limiting unit of the intelligent seat adjustment device and method of the present invention. Figure 4 This is a schematic diagram of the rear fixing frame, positioning unit, and pressing unit of a seat intelligent adjustment device and method according to the present invention. Figure 5 This is a schematic diagram of the positioning unit and pressing unit structure of an intelligent seat adjustment device and method according to the present invention; Figure 6 This is a schematic diagram of the transmission unit structure of an intelligent seat adjustment device and method according to the present invention; Figure 7 This is a schematic diagram of the self-locking unit structure of a seat intelligent adjustment device and method according to the present invention; Figure 8This is a schematic diagram of the support unit and installation unit structure of the intelligent seat adjustment device and method of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Support unit; 101. Seat cushion support frame; 102. Parallel frame; 103. Connecting rod; 104. Welding rod; 105. Snap-fit ​​block; 106. Snap-fit ​​groove; 2. Rear mounting bracket; 3. Backrest frame; 301. First mounting hole; 302. First limiting pin; 4. Limiting unit; 401. Limiting component; 402. First displacement groove; 403. Second mounting hole; 404. First fixing rod; 405. Second fixing rod; 406. First connecting frame; 5. Positioning unit; 501. Fixing plate; 502. Sleeve; 503. Guide frame; 504. Rotary bearing; 6. Pressing unit; 601. Pressing cylinder; 602. Support plate; 603. Rack plate; 604. Mounting plate; 7. Transmission unit; 701. First transmission rod; 702. First gear; 703. Parallel bevel gear; 704. Second connecting frame; 705. Rotating sleeve; 706. Third transmission rod; 707. Vertical bevel gear; 708. Second gear; 709. Connecting square steel; 8. Limiting cylinder; 801. Slotted; 802. Rotating rod; 9. Self-locking unit; 901. Pull rod; 902. Pull handle; 903. Vertical rod; 904. Parallel rod; 905. First locking plate; 906. Second locking plate; 907. Second displacement groove; 908. Torsion spring; 909. Second limiting pin; 10. Mounting unit; 1001. Base frame; 1002. Card slot; 11. Spring; 12. Second transmission rod; 13. Third gear; 14. Limiting block; 15. Limiting groove. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1 -Appendix Figure 8 This application will be described in further detail below.

[0019] Example: Please see Figures 1-8As shown, the present invention provides a technical solution: an intelligent seat adjustment device, including a support unit 1, a rear fixing frame 2 welded to the rear side of the support unit 1, a second transmission rod 12 rotatably connected to the middle of the rear fixing frame 2, a backrest frame 3 rotatably mounted on the second transmission rod 12, and limit units 4 provided on the left and right sides of the bottom of the backrest frame 3, the limit units 4 being fixedly connected to the left and right ends of the rear side of the rear fixing frame 2 respectively; a positioning unit 5 welded to the upper part of the support unit 1, a pressing unit 6 sliding up and down in the middle of the positioning unit 5, and a transmission unit 7 provided at the bottom of the positioning unit 5 and the rear side of the rear fixing frame 2; an installation unit 10 provided at the bottom of the support unit 1, a limit cylinder 8 welded to the middle of the upper end of the installation unit 10, and a self-locking unit 9 provided on the front side of the limit cylinder 8; The transmission unit 7 includes a first transmission rod 701 symmetrically arranged on the left and right sides and a second connecting frame 704 fixedly connected to the middle of the rear end of the rear fixed frame 2. The front end of each of the first transmission rods 701 is fixedly connected to a first gear 702, and the rear end of each of the first transmission rods 701 is fixedly connected to a parallel bevel gear 703. The left and right ends of the front side of the second connecting frame 704 are fixedly connected to rotating sleeves 705. A third transmission rod 706 is rotatably arranged in the middle of the rotating sleeve 705. The left and right ends of the third transmission rod 706 are fixedly connected to vertical bevel gears 707. Each vertical bevel gear 707 meshes with a corresponding parallel bevel gear 703. The parallel bevel gears 703 and vertical bevel gears 707 cooperate with each other to achieve 90° power reversal. The two sets of transmission structures are symmetrically arranged to ensure that the power transmission on both sides is synchronous and consistent. The rotating sleeve 705 supports and positions the third transmission rod 706, effectively reducing transmission sway and making the entire gear transmission run smoothly and with high transmission efficiency. The middle part of the second transmission rod 12 is fixedly connected to the third gear 13, and the middle part of the third transmission rod 706 is fixedly connected to the second gear 708. The second gear 708 meshes with the third gear 13. Through the meshing of the second gear 708 and the third gear 13, the rotational power of the third transmission rod 706 is transmitted to the second transmission rod 12. The gear meshing clearance is small and the transmission ratio is stable, which can accurately control the flipping angle of the backrest frame 3 and has high adjustment accuracy. The support unit 1 includes a seat support frame 101, the limiting unit 4 includes a limiting member 401, the positioning unit 5 includes a fixing plate 501, and the pressing unit 6 includes a pressing cylinder 601.

[0020] Parallel frames 102 are welded to the front and rear sides of the upper part of the seat support frame 101. Connecting rods 103 are welded to the left and right ends of the inner side of the parallel frame 102. The inner end of the connecting rod 103 is welded to the four corners of the fixing plate 501. The seat support frame 101, parallel frame 102 and connecting rod 103 form an integrated frame structure. The multi-point welding connection is firm, the overall load-bearing capacity is strong, the force can be evenly distributed, and it is not easy to deform or loosen after long-term use. The backrest frame 3 has first mounting holes 301 on both the left and right sides of its bottom end. The left and right ends of the second transmission rod 12 are respectively fixedly connected to the inner side of the corresponding first mounting holes 301. The first mounting holes 301 are used to achieve rigid assembly of the backrest frame 3 and the second transmission rod 12. There is no relative rotation between the two, and the power transmission is lossless. At the same time, the assembly, disassembly and maintenance operations are simple.

[0021] A sleeve 502 is welded to the middle of the fixed plate 501, and the lower pressure cylinder 601 is slidably connected to the inner side of the sleeve 502. Support plates 602 are welded to the four corners of the upper end of the lower pressure cylinder 601. Several springs 11 are equidistantly arranged at the bottom of the support plates 602. The bottom ends of the springs 11 are engaged with the upper part of the fixed plate 501. The sleeve 502 provides vertical guidance for the lower pressure cylinder 601 to prevent sliding and deviation. The springs 11 have buffering and reset functions, which can adapt to the weight of different users. They can buffer and reduce shock when sitting down, and can drive the lower pressure cylinder 601 to automatically reset after standing up, greatly improving the riding experience. Connecting square steel 709 is welded to both the left and right ends of the front side of the second connecting frame 704. The connecting square steel 709 is fixedly connected to the rear of the rear fixing frame 2. The connecting square steel 709 reinforces the second connecting frame 704, improves the overall installation strength of the transmission unit 7, prevents displacement and loosening due to long-term stress, and ensures the continuous and stable operation of the transmission system.

[0022] A rack plate 603 is welded to both the left and right ends of the outer side of the pressing cylinder 601. The rack plate 603 meshes with the corresponding first gear 702. The rack plate 603 and the first gear 702 form a rack and gear mechanism, which converts the linear pressing motion of the pressing cylinder 601 into the rotational motion of the first transmission rod 701. The motion conversion is smooth and the response speed is fast. The bottom end of the fixed plate 501 is fixedly connected to the guide frame 503 by bolts on both the front and rear sides. The guide frame 503 is provided with a rotating bearing 504 on the left and right ends of the inner side. The first transmission rod 701 rotates in the corresponding rotating bearing 504. The guide frame 503 fixes the rotating bearing 504. The rotating bearing 504 effectively reduces the frictional resistance when the first transmission rod 701 rotates, reduces the wear of parts, and extends the overall service life of the equipment. The pressing cylinder 601 is slidably connected to the inner side of the limiting cylinder 8. The limiting cylinder 8 and the sleeve 502 form a double guide structure. The double limiting can further constrain the movement trajectory of the pressing cylinder 601 and prevent sliding jamming and left and right swaying problems.

[0023] The limiting components 401 are respectively set on the left and right ends of the rear side of the rear fixing frame 2. The middle of each limiting component 401 is provided with a first displacement groove 402. The left and right ends of the inner side of the backrest frame 3 are provided with first limiting pins 302. The first limiting pins 302 are slidably connected to the inner side of the corresponding first displacement groove 402. The first limiting pins 302 slide with the backrest frame 3 in the first displacement groove 402, limiting and guiding the flipping stroke of the backrest frame 3, limiting the maximum tilt angle of the backrest, and playing a primary safety protection role. Each limiting member 401 has a first connecting frame 406 welded to its bottom end. The first connecting frame 406 is fixedly connected to the left and right rear sides of the rear fixing frame 2 by bolts. Each limiting member 401 has a first fixing rod 404 on its inner side. The limiting member 401 has a second mounting hole 403 on its front and upper sides. The first connecting frame 406 is fixed to the limiting member 401 by bolt connection. The second mounting hole 403 is used to realize multi-point assembly, which is flexible to disassemble and assemble, and facilitates the later inspection and replacement of the limiting unit 4. The upper end of the first fixing rod 404 is welded with a second fixing rod 405. The upper ends of the first fixing rod 404 and the second fixing rod 405 are respectively inserted into the inner side of the corresponding second mounting hole 403 and fixed with nuts. The bottom end of the first fixing rod 404 is respectively inserted into the left and right sides of the rear fixing frame 2 and fixed with nuts. The first fixing rod 404 and the second fixing rod 405 are locked with multiple nuts, so that the connection between the limiting part 401 and the rear fixing frame 2 is more secure and will not loosen or shift when bearing the backrest reaction force.

[0024] The limiting cylinder 8 has slots 801 on both the left and right sides, and rotating rods 802 are welded on them; the self-locking unit 9 includes a pull rod 901, and a handle 902 is welded on the rear end of each pull rod 901. The rear end of the handle 902 is rotatably connected to the outside of the corresponding rotating rod 802. A torsion spring 908 is installed on the outside of each rotating rod 802. The rotating rod 802 serves as the rotation fulcrum of the handle 902. The torsion spring 908 can automatically drive the handle 902 to reset after unlocking. The unlocking and locking operations are simple and labor-saving, and have a high degree of automation. Mounting plates 604 are welded to the bottom left and right sides of the pressure cylinder 601, and the mounting plates 604 are slidably connected to the corresponding slots 801. A second locking plate 906 is welded to the front side of the mounting plate 604. A vertical rod 903 is threaded to the upper part of the limiting cylinder 8. A parallel rod 904 is welded to the upper end of the vertical rod 903. A first locking plate 905 is rotatably mounted on the left and right ends of the parallel rod 904. The first locking plate 905 engages with the corresponding second locking plate 906. The slots 801 guide the mounting plate 604. The first locking plate 905 and the second locking plate 906 adopt a tooth surface meshing structure, which can lock at any height of the pressure cylinder 601. It has a variety of positions and a firm positioning, which can meet the backrest angle needs of different people. The outer side of the first toothed plate 905 is fixedly connected with a second limiting pin 909. The middle part of the handle 902 is provided with a second displacement groove 907. The second limiting pin 909 is slidably connected to the inner side of the corresponding second displacement groove 907. The second limiting pin 909 and the second displacement groove 907 form a linkage mechanism, which accurately transmits the swinging action of the handle 902 to the first toothed plate 905. The transmission logic is simple and the action synchronization is good.

[0025] The installation unit 10 includes a base frame 1001, with slots 1002 at each of the four corners of the base frame 1001; welding rods 104 are welded to each of the four corners of the bottom end of the seat support frame 101, and snap-fit ​​blocks 105 are welded to the inner side of each welding rod 104. Each snap-fit ​​block 105 has a snap-fit ​​groove 106, which engages with the corresponding slot 1002. The slots 1002 and snap-fit ​​grooves 106 engage and position each other, enabling rapid assembly, precise positioning, and convenient disassembly and assembly, facilitating equipment transportation, installation, and maintenance.

[0026] Limiting blocks 14 are provided on the upper left and right sides of the rear side of the rear fixing frame 2. Each limiting block 14 has a limiting groove 15. The limiting block 14 and the limiting groove 15 form a limiting structure, which together with the limiting unit 4 forms a double safety protection to prevent the backrest frame 3 from overtraveling and comprehensively improve the safety of the seat.

[0027] A method for intelligent seat adjustment, applied to the aforementioned intelligent seat adjustment device, includes the following steps; S1. Unlocking Operation: Before use, first pull the lever 901 to drive the handle 902 at the rear end to rotate outward around the rotating rod 802. The rotating rod 802 is equipped with a torsion spring 908. At this time, the torsion spring 908 is charged. During the rotation of the handle 902, the second displacement groove 907 opened on it will drive the second limit pin 909 to move synchronously, thereby driving the first toothed plate 905 to flip forward around the parallel rod 904, so that the teeth between the first toothed plate 905 and the second toothed plate 906 are completely disengaged, releasing the position lock of the lower pressure cylinder 601, and the device enters the adjustable state. S2. Seating and Pressure Application and Adaptive Displacement of the Pressing Unit: When the user sits down, the weight of the body acts on the support plate 602 at the top of the pressing unit 6. The support plate 602 presses down on the spring 11 at the bottom. Due to the difference in weight of different users, the spring 11 undergoes different degrees of compression deformation, which drives the pressing cylinder 601 to slide down along the sleeve 502 in the middle of the fixed plate 501 and inside the limiting cylinder 8, realizing adaptive adjustment of the pressing displacement. The mounting plate 604 at the bottom of the pressing cylinder 601 slides vertically along the slots 801 on both sides of the limiting cylinder 8 to ensure that the pressing movement is stable and does not deviate. S3. The transmission mechanism is linked and the backrest angle is automatically adjusted: When the pressure cylinder 601 moves downward, the rack plates 603 fixed on both sides move downward synchronously. The rack plates 603 mesh with the first gear 702 to drive the first transmission rod 701 to rotate as a whole. The parallel bevel gear 703 at the rear end of the first transmission rod 701 rotates accordingly and meshes with the vertical bevel gear 707 to drive it to rotate. This causes the third transmission rod 706 between the two vertical bevel gears 707 to rotate synchronously. The second gear 708 in the middle of the third transmission rod 706 rotates accordingly and further meshes with the third gear 13 to rotate. The third gear 13 is fixed in the middle of the second transmission rod 12. Therefore, the second transmission rod 12 rotates synchronously, causing the backrest frame 3 mounted on it to tilt backward around the second transmission rod 12 as the axis. The first limiting pin 302 on the inner side of the backrest frame 3 slides in the first displacement groove 402 of the limiting member 401. The limiting unit 4 guides and limits the movement trajectory of the backrest frame 3 to prevent excessive backrest deflection. At the same time, the limiting block 14 and the limiting groove 15 above the rear fixed frame 2 can provide the ultimate limit for the backrest frame 3 to ensure safe use. S4. Seating complete, automatic locking and positioning: When the user is seated stably and the backrest angle is adjusted to the appropriate position, the pull rod 901 is released, the torsion spring 908 releases its stored force and drives the pull handle 902 to reset. The pull handle 902 drives the first locking plate 905 to return to its original position through the second displacement groove 907 and the second limit pin 909, so that the first locking plate 905 and the second locking plate 906 in the current position re-engage. The locking teeth lock the vertical position of the pressing cylinder 601, preventing the pressing unit 6 from rebounding. Then, the entire transmission mechanism locks the second transmission rod 12 and the backrest frame 3, keeping the backrest angle fixed and completing the overall adjustment and locking. S5. Overall Installation and Fixing Principle of the Device: During the equipment assembly stage, the base frame 1001 of the installation unit 10 is first placed in the installation position. The base frame 1001 has slots 1002 at its four corners. The bottom of the seat support frame 101 of the support unit 1 is welded with a welding rod 104. The inner side of the welding rod 104 is fixed with a snap-fit ​​block 105. The snap-fit ​​block 105 has a snap-fit ​​groove 106. After the snap-fit ​​groove 106 and the slot 1002 are snapped and aligned with each other, bolts and nuts are used to lock them in place, so as to achieve a stable assembly of the support unit 1 and the installation unit 10. The limiting cylinder 8 is welded and fixed to the middle of the upper end of the base frame 1001 to provide an installation reference for the pressing unit 6 and the self-locking unit 9.

[0028] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A seat intelligent adjustment device, comprising a support unit (1), characterized in that: A rear fixing frame (2) is welded to the rear side of the support unit (1). A second transmission rod (12) is rotatably connected to the middle of the rear fixing frame (2). A backrest frame (3) is rotatably mounted on the second transmission rod (12). Limiting units (4) are provided on the left and right sides of the bottom of the backrest frame (3). The limiting units (4) are fixedly connected to the left and right ends of the rear side of the rear fixing frame (2). A positioning unit (5) is welded to the upper part of the support unit (1). A pressing unit (6) slides up and down in the middle of the positioning unit (5). A transmission unit (7) is provided at the bottom of the positioning unit (5) and the rear side of the rear fixing frame (2). An installation unit (10) is provided at the bottom of the support unit (1). A limiting cylinder (8) is welded to the middle of the upper end of the installation unit (10). A self-locking unit (9) is provided on the front side of the limiting cylinder (8). The transmission unit (7) includes a first transmission rod (701) symmetrically arranged on the left and right sides and a second connecting frame (704) fixedly connected to the middle of the rear end of the rear fixed frame (2). The front end of the first transmission rod (701) is fixedly connected to a first gear (702), and the rear end of the first transmission rod (701) is fixedly connected to a parallel bevel gear (703). The left and right ends of the front side of the second connecting frame (704) are fixedly connected to a rotating sleeve (705). The middle of the rotating sleeve (705) is rotatably arranged with a third transmission rod (706). The left and right ends of the third transmission rod (706) are fixedly connected to vertical bevel gears (707). The vertical bevel gears (707) mesh with the corresponding parallel bevel gears (703). The middle part of the second transmission rod (12) is fixedly connected to a third gear (13), and the middle part of the third transmission rod (706) is fixedly connected to a second gear (708), and the second gear (708) meshes with the third gear (13); The support unit (1) includes a seat support frame (101), the limiting unit (4) includes a limiting member (401), the positioning unit (5) includes a fixing plate (501), and the pressing unit (6) includes a pressing cylinder (601).

2. The intelligent seat adjustment device according to claim 1, characterized in that, Parallel frames (102) are welded to the front and rear sides of the upper part of the seat support frame (101). Connecting rods (103) are welded to the left and right ends of the inner side of the parallel frame (102). The inner end of the connecting rod (103) is welded to the four corners of the fixed plate (501). The bottom left and right sides of the backrest frame (3) are provided with first mounting holes (301), and the left and right ends of the second transmission rod (12) are respectively fixedly connected to the inner side of the corresponding first mounting holes (301).

3. The intelligent seat adjustment device according to claim 1, characterized in that: A sleeve (502) is welded to the middle of the fixed plate (501), and the lower pressure cylinder (601) is slidably connected to the inner side of the sleeve (502); a support plate (602) is welded to each of the four corners of the upper end of the lower pressure cylinder (601), and a number of springs (11) are equidistantly arranged at the bottom end of the support plate (602), and the bottom ends of the springs (11) are engaged and connected to the upper part of the fixed plate (501); The front left and right ends of the second connecting frame (704) are each welded with a connecting square steel (709), and the connecting square steel (709) is fixedly connected to the rear of the rear fixing frame (2).

4. The intelligent seat adjustment device according to claim 1, characterized in that: The lower pressure cylinder (601) has rack plates (603) welded to both the left and right ends of its outer side, and the rack plates (603) mesh with the corresponding first gears (702); The bottom end of the fixed plate (501) is fixedly connected to the guide frame (503) by bolts on both the front and rear sides. The guide frame (503) is provided with a rotating bearing (504) on the left and right sides of the inner side. The first transmission rod (701) rotates in the corresponding rotating bearing (504). The pressure cylinder (601) is slidably connected to the inside of the limiting cylinder (8).

5. The intelligent seat adjustment device according to claim 1, characterized in that: The limiting member (401) is respectively disposed on the left and right ends of the rear side of the rear fixing frame (2). The middle part of the limiting member (401) is provided with a first displacement groove (402). The left and right ends of the inner side of the backrest frame (3) are provided with a first limiting pin (302). The first limiting pin (302) is slidably connected to the inner side of the corresponding first displacement groove (402). The bottom end of each limiting member (401) is welded with a first connecting frame (406), and the first connecting frame (406) is fixedly connected to the left and right rear sides of the rear fixing frame (2) by bolts respectively; a first fixing rod (404) is provided on the inner side of each limiting member (401), and a second mounting hole (403) is provided on the front and upper sides of each limiting member (401). The upper end of the first fixing rod (404) is welded with a second fixing rod (405). The upper ends of the first fixing rod (404) and the second fixing rod (405) are respectively inserted into the inner side of the corresponding second mounting hole (403) and fixed with nuts. The bottom end of the first fixing rod (404) is respectively inserted into the left and right sides of the rear fixing bracket (2) and fixed with nuts.

6. The intelligent seat adjustment device according to claim 1, characterized in that: The limiting cylinder (8) has slots (801) on both the left and right sides, and rotating rods (802) are welded on them; the self-locking unit (9) includes a pull rod (901), and a handle (902) is welded on the rear end of the pull rod (901). The rear end of the handle (902) is rotatably connected to the outer side of the corresponding rotating rod (802), and a torsion spring (908) is installed on the outer side of the rotating rod (802). Mounting plates (604) are welded to the bottom left and right sides of the pressure cylinder (601), and the mounting plates (604) are slidably connected to the corresponding slots (801); a second toothed plate (906) is welded to the front side of the mounting plate (604); a vertical rod (903) is threaded to the upper part of the limiting cylinder (8); a parallel rod (904) is welded to the upper end of the vertical rod (903); a first toothed plate (905) is rotatably provided at the left and right ends of the parallel rod (904); and the first toothed plate (905) engages with the corresponding second toothed plate (906). The outer side of the first toothed plate (905) is fixedly connected with a second limiting pin (909), and the middle part of the pull handle (902) is provided with a second displacement groove (907). The second limiting pin (909) is slidably connected to the inner side of the corresponding second displacement groove (907).

7. The intelligent seat adjustment device according to claim 1, characterized in that: The installation unit (10) includes a base frame (1001), and slots (1002) are provided at the four corners of the base frame (1001); welding rods (104) are welded to the four corners of the bottom end of the seat support frame (101), and snap-fit ​​blocks (105) are welded to the inner side of the welding rods (104), and snap-fit ​​grooves (106) are provided on the snap-fit ​​blocks (105), and the snap-fit ​​grooves (106) are engaged with the corresponding slots (1002).

8. The intelligent seat adjustment device according to claim 1, characterized in that: The rear upper left and right ends of the rear fixing frame (2) are provided with limit blocks (14), and each limit block (14) has a limit groove (15).

9. A method for intelligent seat adjustment, applied to the intelligent seat adjustment device according to any one of claims 1-8, characterized in that: Includes the following steps; S1. Overall installation of the device: During the equipment assembly stage, the base frame (1001) of the installation unit (10) is placed in the installation position. The base frame (1001) has slots (1002) at the four corners. The bottom of the seat support frame (101) of the support unit (1) is welded with a welding rod (104). The inner side of the welding rod (104) is fixed with a snap-fit ​​block (105). The snap-fit ​​block (105) has a snap-fit ​​groove (106). After the snap-fit ​​groove (106) and the slot (1002) are snapped and aligned, bolts and nuts are used to lock them in place, so as to achieve a stable assembly of the support unit (1) and the installation unit (10). The limiting cylinder (8) is welded and fixed to the middle of the upper end of the base frame (1001). S2. Unlocking Operation: Before use, first pull the lever (901) to drive the handle (902) at the rear end to rotate outward around the rotating rod (802). The rotating rod (802) is equipped with a torsion spring (908) on the outside. At this time, the torsion spring (908) is charged. During the rotation of the handle (902), the second displacement groove (907) opened on it will drive the second limit pin (909) to move synchronously, thereby driving the first toothed plate (905) to flip forward around the parallel rod (904) as the axis, so that the teeth between the first toothed plate (905) and the second toothed plate (906) are completely disengaged, and the position lock of the lower pressure cylinder (601) is released. S3, Seating and Pressure Application and Adaptive Displacement of the Pressing Unit: When the user sits down, the weight of the human body acts on the support plate (602) at the top of the pressing unit (6). The support plate (602) presses down on the spring (11) at the bottom. Due to the difference in weight of different users, the spring (11) produces different degrees of compression deformation, thereby driving the pressing cylinder (601) to slide down along the sleeve (502) in the middle of the fixed plate (501) and the inside of the limiting cylinder (8), realizing the adaptive adjustment of the pressing displacement. The mounting plate (604) at the bottom of the pressing cylinder (601) slides vertically along the slots (801) on both sides of the limiting cylinder (8). S4. Automatic adjustment of backrest angle: When the pressure cylinder (601) moves downward, the rack plates (603) fixed on both sides move downward synchronously. The rack plates (603) mesh with the first gear (702) to drive the first transmission rod (701) to rotate as a whole. The parallel bevel gear (703) at the rear end of the first transmission rod (701) rotates accordingly and meshes with the vertical bevel gear (707) to drive it. This causes the third transmission rod (706) between the two vertical bevel gears (707) to rotate synchronously. The second gear (708) in the middle of the third transmission rod (706) rotates accordingly and further meshes with the third gear to drive the third gear. When the wheel (13) rotates, the third gear (13) is fixed in the middle of the second transmission rod (12), so the second transmission rod (12) rotates synchronously, causing the backrest frame (3) mounted on it to tilt backward with the second transmission rod (12) as the axis. The first limiting pin (302) on the inner side of the backrest frame (3) slides in the first displacement groove (402) of the limiting member (401). The movement trajectory of the backrest frame (3) is guided and the stroke is limited by the limiting unit (4). At the same time, the limiting block (14) and the limiting groove (15) above the rear fixed frame (2) can limit the backrest frame (3) to the end. S5. Automatic locking and positioning: When the user is seated and stable, and the backrest angle is adjusted to the appropriate position, the pull rod (901) is released, the torsion spring (908) releases its stored force and drives the pull handle (902) to reset. The pull handle (902) drives the first toothed plate (905) to return to its original position through the second displacement groove (907) and the second limit pin (909), so that the first toothed plate (905) and the second toothed plate (906) in the current position re-engage. The vertical position of the pressing cylinder (601) is locked by the tooth engagement, preventing the pressing unit (6) from rebounding, and then locking the second transmission rod (12) and the backrest frame (3) through the entire transmission mechanism.

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