Intelligent adjustable wheelchair with damping function

Abstract

The invention discloses an intelligent adjustable wheelchair with a damping function, and relates to the technical field of wheelchairs, the intelligent adjustable wheelchair comprises a wheelchair framework, the wheelchair framework is rotatably connected with direction auxiliary wheels symmetrically distributed along the wheelchair framework, and the wheelchair framework is rotatably connected with first rotating shafts symmetrically distributed along the wheelchair framework. Based on an existing health platform, through extrusion cooperation of a second buffer rod and an adjusting plate, the compression strength of a telescopic spring can be automatically adjusted according to the road surface condition, so that the damping strength can be adjusted according to the road surface condition, and the telescopic spring serves as a soft spring when the wheelchair is impacted by a small-amplitude roadblock; therefore, compression and rebounding can be achieved more easily so as to better absorb and adapt to small-amplitude vibration, and smoother and more comfortable advancing experience is provided. And under the condition of large-amplitude roadblock impact, the telescopic spring serves as a hard spring, so that better support can be provided, system shaking is reduced, and the overall stability of the wheelchair is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchairs, and in particular to a wheelchair with an intelligent adjustable shock absorption function. Background Art

[0002] Wheelchairs are important auxiliary tools for the elderly, disabled people and rehabilitation patients in their daily lives. When used outdoors or on complex terrain, users often encounter various road conditions, such as pebbles, potholes, steps, etc. These uneven roads can cause discomfort to wheelchair users and may even cause health problems, such as spinal injuries, muscle fatigue or joint pain.

[0003] Most existing wheelchairs use a fixed shock absorption system, usually relying on hard or soft springs to absorb vibrations. This design cannot dynamically adjust the shock absorption strength according to different road conditions, because hard springs are more suitable for handling larger impact forces or heavy loads, providing stronger support and recovery. For small-amplitude, high-frequency vibrations, hard springs may not react sensitively enough and cannot effectively absorb these tiny energies, resulting in more vibrations transmitted to the system; while soft springs can compress and rebound more easily, which means they can better absorb and adapt to smaller vibrations. However, soft springs may not be able to effectively control larger shocks or vibrations, which may cause excessive swaying or instability. As a result, when facing small-amplitude obstacles, the shock absorption effect of hard springs may be too stiff, causing the rider to feel bumpy; and under large-amplitude impacts, the shock absorption capacity of soft springs is insufficient, which may cause the wheelchair to shake violently, affecting stability and comfort.

[0004] Therefore, it is particularly important to design an intelligent adjustable shock-absorbing wheelchair that can automatically adjust the shock absorption force according to the road conditions. Summary of the invention

[0005] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a wheelchair with an intelligent adjustable shock absorption function.

[0006] A wheelchair with an intelligent adjustable shock-absorbing function comprises a wheelchair frame, the wheelchair frame is rotatably connected to direction-assisting wheels symmetrically distributed along the wheelchair frame, the wheelchair frame is rotatably connected to first rotating shafts symmetrically distributed along the wheelchair frame, an electric driving wheel is rotatably connected between the symmetrically distributed first rotating shafts, the wheelchair frame is fixedly connected to a first fixed frame symmetrically distributed along the wheelchair frame, the first fixed frame is slidably connected to a first buffer rod, the first buffer rod is rotatably connected to an adjacent first rotating shaft, a telescopic spring is fixedly connected between the first buffer rod and the adjacent first fixed frame, the first fixed frame is slidably connected to a second buffer rod, the second buffer rod is fixedly connected to the adjacent first buffer rod, the first fixed frame is slidably connected to an adjustment plate, an adjustment hole is provided on one side of the adjustment plate, an adjustment slot is provided on the other side of the adjustment plate, the second buffer rod is slidably connected to the adjacent adjustment slot, hydraulic oil is stored on a side of the first fixed frame close to the adjustment slot, and a bellows is fixedly connected to a side of the first fixed frame close to the adjustment slot.

[0007] Furthermore, the adjustment groove of the adjustment plate is composed of a connected oblique part and a straight part. When facing the impact of a small-amplitude roadblock, the second buffer rod only slides in the straight part of the adjustment groove. When facing the impact of a large-amplitude roadblock, the second buffer rod slides to the oblique part of the adjustment groove.

[0008] Furthermore, it also includes a fixed shell symmetrically distributed along the wheelchair frame, the fixed shell is fixedly connected to the wheelchair frame, a second rotating shaft is rotatably connected between the symmetrically distributed fixed shells, a spring is fixedly connected between the second rotating shaft and the adjacent fixed shell, a safety belt symmetrically distributed along the second rotating shaft is wound around the second rotating shaft, the wheelchair frame is rotatably connected to buckles symmetrically distributed along the wheelchair frame, the safety belt is pulled out so that the safety belt on one side is engaged with the buckle on the other side, a torsion spring is fixedly connected between the buckle and the wheelchair frame, and the wheelchair frame is provided with a tensioning assembly for tightening the safety belt.

[0009] Furthermore, the tensioning assembly includes a second fixed frame symmetrically distributed along the wheelchair frame, the second fixed frame is fixedly connected to the wheelchair frame, a movable frame is slidably connected between the symmetrically distributed second fixed frames, the second fixed frame is rotatably connected to a rotating frame, the movable frame is used to drive the rotating frame to swing, so that when encountering a large-amplitude roadblock impact, the rotating frame tightens the safety belt, the movable frame is movably connected to a tensioning shaft symmetrically distributed along the movable frame through a movable groove, the spring passes between adjacent rotating frames and the tensioning shaft, and the tensioning shaft is used to tighten the safety belt when encountering a large-amplitude roadblock impact.

[0010] Further, the movable frame is in contact with the rotating frame, and the end surfaces of the movable frame and the rotating frame that are in contact with each other are configured as wedge-shaped surfaces.

[0011] Furthermore, the tensioning assembly also includes a motor corresponding to the second fixed frame, the motor is fixedly connected to the corresponding second fixed frame, the second fixed frame is rotatably connected to a screw, the screw is threadedly connected to the movable frame, the screw is fixedly connected to the output shaft of the adjacent motor, and a contact switch symmetrically distributed along the wheelchair frame is fixedly connected to one side of the wheelchair frame close to the second buffer rod, and the contact switch is electrically connected to the motor through a control module.

[0012] Furthermore, when encountering a roadblock impact with a relatively large amplitude, the second buffer rod slides to contact the adjacent contact switch.

[0013] Furthermore, it also includes an air cushion, which is fixedly connected to the wheelchair frame, the movable frame is fixedly connected to a piston rod symmetrically distributed along the movable frame, the wheelchair frame is fixedly connected to a fixed tube symmetrically distributed along the wheelchair frame, the fixed tube is connected to the air cushion, the fixed tube is fixedly connected to an air injection tube, and the piston rod is slidably connected to the adjacent air injection tube.

[0014] Furthermore, it also includes a fixed frame, which is fixedly connected to the wheelchair frame. A heart rate tester is fixedly installed in the fixed frame. The heart rate tester is connected to the terminal device via Bluetooth. The heart rate tester embeds electrodes into the backrest of the wheelchair frame through a connecting rope to ensure good contact with the user.

[0015] Furthermore, it also includes a cushion, which is fixed to the backrest of the wheelchair frame.

[0016] The beneficial effects are as follows: based on the existing health platform, the present invention can automatically adjust the compression force of the telescopic spring according to the road conditions through the extrusion cooperation of the second buffer rod and the adjustment plate, so that the shock absorption force can be adjusted according to the road conditions, so that when the wheelchair faces the impact of a road obstacle with a smaller amplitude, the telescopic spring acts as a soft spring, so that it can be compressed and rebounded more easily, so as to better absorb and adapt to smaller amplitude vibrations, and provide a smoother and more comfortable travel experience; and when facing the impact of a road obstacle with a larger amplitude, the telescopic spring acts as a hard spring, so that it can provide better support, reduce system shaking, and enhance the overall stability of the wheelchair.

[0017] Based on the existing health platform, the present invention fixes the patient by pulling out the safety belt and cross-buckle it between the wheelchair frame and the buckle, and when encountering a large-amplitude roadblock impact, the mobile frame can move backward to drive the tensioning axis to tighten the safety belt backward, so that when encountering a large-amplitude roadblock impact, the safety belt is further tightened to fix the patient, thereby enhancing the fixation protection of the patient.

[0018] Based on the existing health platform, when the present invention encounters a large-amplitude roadblock impact, the moving frame drives the piston rod to slide backward relative to the air injection pipe, so that the gas is injected into the air cushion through the fixed pipe to increase the air pressure in the air cushion, forming a stronger supporting force, thereby effectively absorbing the impact energy. Once the vibration weakens, the air cushion gradually returns to a normal state to meet the requirements of comfort and softness when sitting in a wheelchair.

[0019] Based on the existing health platform, the present invention forms a health monitoring system through a heart rate tester to monitor the patient's heart rate in real time, and equips the health monitoring system with corresponding software to process the collected data, and synchronizes the information to a smartphone or other terminal device via Bluetooth, so that the user and his or her caregivers can check the heart rate status and historical trends at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the first viewing angle of the present invention.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the second viewing angle of the present invention.

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the first rotating shaft, the first fixing frame and other components of the present invention.

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the telescopic spring, the second buffer rod, the adjustment plate and other components of the present invention.

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the second buffer rod, the adjustment plate, the bellows and other components of the present invention.

[0025] Figure 6 It is a three-dimensional structural schematic diagram of the fixing shell, the safety belt, the contact switch and other components of the present invention.

[0026] Figure 7 It is a three-dimensional structural schematic diagram of the safety belt, screw rod, movable frame and other components of the present invention.

[0027] Figure 8 It is a three-dimensional structural schematic diagram of components such as a moving frame, a rotating frame and a tensioning shaft of the present invention.

[0028] Fig. 9 It is a schematic diagram of the three-dimensional structure of the motor, screw rod and movable frame of the present invention.

[0029] Fig.10 It is a schematic diagram of the three-dimensional structure of the wheelchair frame, buckles, torsion springs and other components of the present invention.

[0030] Fig.11 It is a three-dimensional structural schematic diagram of the piston rod, gas injection pipe, fixing pipe and other components of the present invention.

[0031] Fig.12 It is a schematic diagram of the three-dimensional structure of the movable frame, piston rod and gas injection pipe of the present invention.

[0032] Fig.13 The figure is a three-dimensional structural diagram of the fixing frame, the heart rate tester, the connecting rope and other components of the present invention.

[0033] Fig.14 It is a three-dimensional structural schematic diagram of components such as a back cushion and a wheelchair frame of the present invention.

[0034] Figure numbers: 101_wheelchair frame, 102_steering auxiliary wheel, 103_first rotating shaft, 104_electric driving wheel, 105_first fixed frame, 106_first buffer rod, 107_telescopic spring, 108_second buffer rod, 109_adjusting plate, 110_bellows, 201_fixed shell, 202_second rotating shaft, 203_spring, 204_safety belt, 205_second fixed frame, 206_motor, 207_screw, 208_moving frame, 209_rotating frame, 210_tension shaft, 211_buckle, 212_torsion spring, 213_contact switch, 301_air cushion, 302_piston rod, 303_air injection pipe, 304_fixed pipe, 401_fixed frame, 402_heart rate tester, 403_connecting rope, 501_cushion. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0036] Embodiment 1: A wheelchair with intelligent adjustable shock absorption function, such as Figure 1-Figure 5As shown, it includes a wheelchair frame 101, the lower front part of the wheelchair frame 101 is rotatably connected to a direction auxiliary wheel 102 symmetrically distributed along the wheelchair frame 101, the upper front part of the wheelchair frame 101 is rotatably connected to a first rotating shaft 103 symmetrically distributed along the wheelchair frame 101, and an electric driving wheel 104 is rotatably connected between the lower rear parts of the symmetrically distributed first rotating shaft 103, and the rear side of the wheelchair frame 101 is fixedly connected to a first fixing frame 105 symmetrically distributed along the wheelchair frame 101, and the front side of the first fixing frame 105 is slidably connected to a first buffer rod 106 in the front-to-back direction, the first buffer rod 106 is rotatably connected to the adjacent first rotating shaft 103, a telescopic spring 107 is fixedly connected between the rear end of the first buffer rod 106 and the adjacent first fixing frame 105, and the rear side of the first fixing frame 105 is slidably connected to a second buffer rod 106 in the front-to-back direction. 08, the second buffer rod 108 is fixedly connected to the rear end of the adjacent first buffer rod 106, and an adjustment plate 109 is slidably connected in the first fixed frame 105 along the up and down directions. The second buffer rod 108 and the adjacent first fixed frame 105 near the side of the adjustment plate 109 constitute a cylinder piston structure, an adjustment hole is opened on the lower side of the adjustment plate 109, and an adjustment groove is opened on the upper side of the adjustment plate 109. The adjustment groove of the adjustment plate 109 is composed of a connected oblique part and a straight part. The front side of the second buffer rod 108 is slidably connected to the adjacent adjustment groove. When facing the impact of a small-amplitude roadblock, the second buffer rod 108 only slides in the straight part of the adjustment groove. When facing the impact of a large-amplitude roadblock, the second buffer rod 108 slides to the oblique part of the adjustment groove. The first fixed frame 105 stores hydraulic oil on one side near the adjustment groove, and a bellows 110 is fixedly connected to the one side of the first fixed frame 105 near the adjustment groove.

[0037] When the wheelchair is moving, when the electric driving wheel 104 presses against obstacles such as stones, the electric driving wheel 104 is lifted up due to the influence of the roadblock, thereby driving the first rotating shaft 103 to swing backward and upward, and the first rotating shaft 103 pushes the first buffer rod 106 to slide backward along the first fixed frame 105, the telescopic spring 107 is compressed, and the first buffer rod 106 drives the second buffer rod 108 to move backward. During the movement, the first fixed frame 105 and the second buffer rod 108 act as a cylinder piston structure, thereby forming a negative pressure, and the bellows 110 is stretched, so that the hydraulic oil in the first fixed frame 105 passes backward through the adjustment hole of the adjustment plate 109. When the electric driving wheel 104 is free from the roadblock, the telescopic spring 107 is reset, so that the first buffer rod 106 slides forward and resets along the first fixed frame 105, the first buffer rod 106 drives the second buffer rod 108 to move forward and reset, and the bellows 110 is reset.

[0038] In the above process, if the wheelchair is less impacted by the roadblock during movement, the second buffer rod 108 slides a shorter distance relative to the adjustment slot of the adjustment plate 109, and only slides along the straight portion of the adjustment slot. At this time, since the adjustment hole of the adjustment plate 109 is initially adjusted to the maximum, the second buffer rod 108 can easily draw hydraulic oil backwards, thereby allowing the first buffer rod 106 to slide backwards more easily. In this way, the telescopic spring 107 is equivalent to a normal soft spring.

[0039] If the wheelchair is greatly impacted by an obstacle during movement, the second buffer rod 108 will slide a long distance relative to the adjustment slot of the adjustment plate 109 and will slide backward to the oblique portion of the adjustment slot. At this time, the second buffer rod 108 squeezes the adjustment plate 109 through the oblique portion of the adjustment slot to slide downward, so that the adjustment hole of the adjustment plate 109 is adaptively adjusted to a smaller size. Therefore, the second buffer rod 108 can extract the hydraulic oil backward with greater difficulty, thereby making the first buffer rod 106 slide backward with greater difficulty. In this way, the telescopic spring 107 is equivalent to a hard spring.

[0040] In summary, based on the existing health platform, the present invention can automatically adjust the compression force of the telescopic spring 107 according to the road conditions through the extrusion cooperation of the second buffer rod 108 and the adjustment plate 109, so that the shock absorption force can be adjusted according to the road conditions, so that when the wheelchair faces the impact of a road obstacle with a smaller amplitude, the telescopic spring 107 acts as a soft spring, which can be compressed and rebounded more easily, so as to better absorb and adapt to smaller amplitude vibrations, and provide a smoother and more comfortable travel experience; and when facing the impact of a road obstacle with a larger amplitude, the telescopic spring 107 acts as a hard spring, which can provide better support, reduce system shaking, and enhance the overall stability of the wheelchair.

[0041] Embodiment 2: Based on embodiment 1, Figure 6 , Figure 7 and Fig.10 As shown, it also includes a fixed shell 201 symmetrically distributed along the wheelchair frame 101, the fixed shell 201 is fixedly connected to the backrest of the wheelchair frame 101, a second rotating shaft 202 is rotatably connected between the symmetrically distributed fixed shells 201, a spring 203 is fixedly connected between the second rotating shaft 202 and the adjacent fixed shell 201, a safety belt 204 symmetrically distributed along the second rotating shaft 202 is wound around the second rotating shaft 202, a buckle 211 symmetrically distributed along the wheelchair frame 101 is rotatably connected to the front side of the wheelchair frame 101, the safety belt 204 is pulled out, so that the safety belt 204 on one side is engaged with the buckle 211 on the other side, and a torsion spring 212 is fixedly connected between the buckle 211 and the wheelchair frame 101.

[0042] like Figure 7 and Figure 8As shown, it also includes a second fixed frame 205 symmetrically distributed along the wheelchair frame 101, the second fixed frame 205 is fixedly connected to the backrest of the wheelchair frame 101, and a moving frame 208 is slidably connected between the second fixed frames 205 symmetrically distributed along the front and rear directions. The lower part of the second fixed frame 205 is rotatably connected to a rotating frame 209, the moving frame 208 is in contact with the rotating frame 209, and the end surfaces of the moving frame 208 and the rotating frame 209 that contact each other are set as wedge-shaped surfaces. The moving frame 208 is used to toggle the rotating frame 209 to swing, so that when encountering a large-amplitude roadblock impact, the rotating frame 209 presses the safety belt 204, and the front side of the moving frame 208 is movably connected to a tensioning shaft 210 symmetrically distributed along the moving frame 208 through a movable groove, and the clockwork 203 passes between the adjacent rotating frames 209 and the tensioning shaft 210, and the tensioning shaft 210 is used to tighten the safety belt 204 when encountering a large-amplitude roadblock impact.

[0043] like Figure 6 , Figure 7 and Fig. 9 As shown, it also includes a motor 206 corresponding to the second fixed frame 205, the motor 206 is fixedly connected to the corresponding second fixed frame 205, the rear side of the second fixed frame 205 is rotatably connected with a screw 207, the screw 207 is threadedly connected to the movable frame 208, the screw 207 is fixedly connected to the output shaft of the adjacent motor 206, and a contact switch 213 symmetrically distributed along the left and right sides of the wheelchair frame 101 is fixedly connected to one side of the wheelchair frame 101 close to the second buffer rod 108, the contact switch 213 is electrically connected to the motor 206 through the control module, and when encountering a large amplitude roadblock impact, the second buffer rod 108 slides backward to contact the adjacent contact switch 213.

[0044] Based on the existing health platform, in order to prevent the patient in the wheelchair from falling down when encountering a large amplitude roadblock impact, the safety belt 204 is pulled out and cross-buckled between the wheelchair frame 101 and the buckle 211, and the torsion spring 212 adaptively deforms and resets to fix the patient. When the safety belt 204 is pulled out, the second shaft 202 rotates, the spring 203 deforms and stores force, and when encountering a large amplitude roadblock impact, the second buffer rod 108 slides to contact the contact switch 213, the contact switch 213 sends an electrical signal, the control module receives the electrical signal, and controls the output shaft of the motor 206 to drive the screw 207 to rotate. The movable frame 208 moves backward, and the movable frame 208 squeezes the upper part of the rotating frame 209 and swings backward, so that the lower part of the rotating frame 209 swings forward, and the lower part of the rotating frame 209 presses the side of the safety belt 204 close to the second rotating shaft 202, so that the side of the safety belt 204 close to the second rotating shaft 202 is fixed and cannot be pulled out further. In this way, when the movable frame 208 moves backward, it can drive the tensioning shaft 210 to tighten the safety belt 204 backward, so that when encountering a large-amplitude roadblock impact, the safety belt 204 is further tightened to fix the patient, thereby enhancing the fixation protection of the patient.

[0045] When the electric driving wheel 104 is free from the roadblock, the second buffer rod 108 slides to be free from the contact switch 213, the contact switch 213 sends an electrical signal, the control module receives the electrical signal, and controls the output shaft of the motor 206 to drive the screw 207 to rotate in the opposite direction, thereby driving the moving frame 208 to move forward and release the rotating frame 209, so that the rotating frame 209 no longer presses the safety belt 204, and the tensioning shaft 210 no longer tightens the safety belt 204.

[0046] like Fig.11 and Fig.12 As shown, it also includes an air cushion 301, which is fixedly connected to the wheelchair frame 101, and a piston rod 302 is fixedly connected to the movable frame 208 and is symmetrically distributed along the movable frame 208. A fixed tube 304 is fixedly connected to the backrest of the wheelchair frame 101 and is symmetrically distributed along the wheelchair frame 101. The fixed tube 304 is connected to the air cushion 301, and the top of the fixed tube 304 is fixedly connected to an air injection tube 303, and the piston rod 302 is slidably connected to the adjacent air injection tube 303.

[0047] When the moving frame 208 moves backward, that is, when encountering a roadblock with a large amplitude, the moving frame 208 drives the piston rod 302 to slide backward relative to the air injection tube 303, so that the gas is injected into the air cushion 301 through the fixed tube 304 to increase the air pressure in the air cushion 301, forming a stronger supporting force, thereby effectively absorbing the impact energy; once the vibration weakens, the moving frame 208 drives the piston rod 302 to slide forward relative to the air injection tube 303, so that the air cushion 301 gradually returns to a normal state to meet the requirements of comfort and softness when sitting in a wheelchair.

[0048] Embodiment 3: Based on embodiment 2, Fig.13 As shown, it also includes a fixing frame 401, which is fixedly connected to the backrest of the wheelchair frame 101. A heart rate tester 402 is fixedly installed in the fixing frame 401. The heart rate tester 402 is connected to the terminal device via Bluetooth. The heart rate tester 402 embeds electrodes into the backrest of the wheelchair frame 101 via a connecting rope 403 to ensure good contact with the user.

[0049] Based on the existing health platform, the present invention forms a health monitoring system through the heart rate tester 402 to monitor the patient's heart rate in real time, and equips the health monitoring system with corresponding software to process the collected data, and synchronizes the information to a smartphone or other terminal device via Bluetooth, so that the user and his or her caregivers can check the heart rate status and historical trends at any time.

[0050] like Fig.14 As shown, a cushion 501 is also included. The cushion 501 is fixed to the backrest of the wheelchair frame 101. By arranging the cushion 501 on the backrest of the wheelchair frame 101, the patient can lean on the backrest of the wheelchair frame 101 more comfortably.

[0051] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A wheelchair with an intelligent adjustable shock absorption function, comprising a wheelchair frame (101), the wheelchair frame (101) being rotatably connected to direction auxiliary wheels (102) symmetrically distributed along the wheelchair frame (101), the wheelchair frame (101) being rotatably connected to first rotating shafts (103) symmetrically distributed along the wheelchair frame (101), and electric driving wheels (104) being rotatably connected between the symmetrically distributed first rotating shafts (103), characterized in that: The wheelchair frame (101) is fixedly connected to a first fixing frame (105) symmetrically distributed along the wheelchair frame (101); the first fixing frame (105) is slidably connected to a first buffer rod (106); the first buffer rod (106) is rotatably connected to an adjacent first rotating shaft (103); a telescopic spring (107) is fixedly connected between the first buffer rod (106) and the adjacent first fixing frame (105); the first fixing frame (105) is slidably connected to a second buffer rod (108); the second buffer rod (108) is fixedly connected to the adjacent first buffer rod (106); the first fixing frame (105) is slidably connected to an adjustment plate (109); an adjustment hole is provided on one side of the adjustment plate (109); an adjustment groove is provided on the other side of the adjustment plate (109); the second buffer rod (108) is slidably connected to the adjacent adjustment groove; hydraulic oil is stored on a side of the first fixing frame (105) close to the adjustment groove; and a bellows (110) is fixedly connected to a side of the first fixing frame (105) close to the adjustment groove.

2. An intelligent wheelchair with adjustable shock absorption function according to claim 1, characterized in that: The adjustment groove of the adjustment plate (109) is composed of a connected oblique portion and a straight portion. When facing the impact of a small-amplitude roadblock, the second buffer rod (108) only slides in the straight portion of the adjustment groove. When facing the impact of a large-amplitude roadblock, the second buffer rod (108) slides to the oblique portion of the adjustment groove.

3. An intelligent wheelchair with adjustable shock absorption function according to claim 2, characterized in that: The invention also comprises fixed shells (201) symmetrically distributed along the wheelchair frame (101), the fixed shells (201) being fixedly connected to the wheelchair frame (101), second rotating shafts (202) being rotatably connected between the symmetrically distributed fixed shells (201), a clockwork spring (203) being fixedly connected between the second rotating shaft (202) and an adjacent fixed shell (201), a safety belt (204) symmetrically distributed along the second rotating shaft (202) being wound around the second rotating shaft (202), a buckle (211) symmetrically distributed along the wheelchair frame (101) being rotatably connected to the wheelchair frame (101), the safety belt (204) being pulled out so that the safety belt (204) on one side and the buckle (211) on the other side are mutually engaged, a torsion spring (212) being fixedly connected between the buckle (211) and the wheelchair frame (101), and a tensioning assembly for tightening the safety belt (204) is provided on the wheelchair frame (101).

4. An intelligent wheelchair with adjustable shock absorption function according to claim 3, characterized in that: The tensioning assembly comprises second fixed frames (205) symmetrically distributed along the wheelchair frame (101), the second fixed frames (205) being fixedly connected to the wheelchair frame (101), a movable frame (208) being slidably connected between the symmetrically distributed second fixed frames (205), a rotating frame (209) being rotatably connected to the second fixed frames (205), the movable frame (208) being used to drive the rotating frame (209) to swing, so that when encountering a large amplitude roadblock impact, the rotating frame (209) presses the safety belt (204), the movable frame (208) being movably connected to a tensioning shaft (210) symmetrically distributed along the movable frame (208) through a movable groove, the clockwork spring (203) passing between adjacent rotating frames (209) and the tensioning shaft (210), and the tensioning shaft (210) being used to tighten the safety belt (204) when encountering a large amplitude roadblock impact.

5. An intelligent wheelchair with adjustable shock absorption function according to claim 4, characterized in that: The movable frame (208) is in contact with the rotating frame (209), and the end surfaces of the movable frame (208) and the rotating frame (209) that are in contact with each other are configured as wedge-shaped surfaces.

6. An intelligent wheelchair with adjustable shock absorption function according to claim 5, characterized in that: The tensioning assembly also includes a motor (206) corresponding to the second fixed frame (205), the motor (206) being fixedly connected to the corresponding second fixed frame (205), the second fixed frame (205) being rotatably connected to a screw rod (207), the screw rod (207) being threadedly connected to the movable frame (208), the screw rod (207) being fixedly connected to the output shaft of an adjacent motor (206), and a contact switch (213) symmetrically distributed along the wheelchair frame (101) being fixedly connected to one side of the wheelchair frame (101) close to the second buffer rod (108), the contact switch (213) being electrically connected to the motor (206) via a control module.

7. An intelligent wheelchair with adjustable shock absorption function according to claim 6, characterized in that: When encountering a roadblock impact with a relatively large amplitude, the second buffer rod (108) slides to contact the adjacent contact switch (213).

8. An intelligent wheelchair with adjustable shock absorption function according to claim 7, characterized in that: The wheelchair also comprises an air cushion (301), the air cushion (301) being fixedly connected to the wheelchair frame (101), the movable frame (208) being fixedly connected to piston rods (302) symmetrically distributed along the movable frame (208), the wheelchair frame (101) being fixedly connected to fixed tubes (304) symmetrically distributed along the wheelchair frame (101), the fixed tubes (304) being connected to the air cushion (301), the fixed tubes (304) being fixedly connected to air injection tubes (303), and the piston rods (302) being slidably connected to adjacent air injection tubes (303).

9. An intelligent wheelchair with adjustable shock absorption function according to claim 8, characterized in that: The invention also comprises a fixing frame (401), the fixing frame (401) being fixedly connected to the wheelchair frame (101), a heart rate tester (402) being fixedly installed in the fixing frame (401), the heart rate tester (402) being connected to the terminal device via Bluetooth, and the heart rate tester (402) embeds electrodes into the backrest of the wheelchair frame (101) via a connecting rope (403) to ensure good contact with the user.

10. An intelligent wheelchair with adjustable shock absorption function according to claim 9, characterized in that: The wheelchair also includes a back cushion (501), which is fixedly connected to the backrest of the wheelchair frame (101).

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