Automatic balancing structure of electric wheelchair
The automatic balancing structure of the electric wheelchair, controlled by a gyroscope and speed sensor, solves the problem of instability in the center of gravity of the electric wheelchair when going uphill or downhill, achieving greater riding comfort and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-03-24
AI Technical Summary
Existing electric wheelchairs have difficulty automatically adjusting their height while in motion, resulting in an unstable center of gravity and a risk of tipping over. They are particularly uncomfortable and unsafe when going up or down slopes.
The system uses a gyroscope and speed sensor combined with a main controller, and adjusts the position of the rear and front wheels through a telescopic device and actuators to achieve automatic balance.
It effectively prevents the rider's body from leaning excessively backward or forward when going up or down slopes, improving the stability and safety of electric wheelchairs at high speeds.
Smart Images
Figure CN224023792U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an automatic balancing structure of electric wheelchair, in particular to an electric wheelchair which is more comfortable and safe to ride. BACKGROUND
[0002] The wheelchair can provide a walking aid for the injured, the sick, the lower body paralyzed, the old and the disabled, and can also facilitate the caregivers (such as family members, long-term care or medical staff) to push, so that they can go out of the house with the help of the wheelchair. However, because the wheelchair needs to be pushed by manpower, it is not only more laborious to use, but also cannot move forward at a faster speed. Therefore, a manufacturer has developed an electric wheelchair structure equipped with a motor and a manual control rod.
[0003] However, because the electric wheelchair moves at a high speed, it is dangerous to have the center of gravity of the electric wheelchair too high and overturning without instant sensing and automatic adjustment of the lifting. When going uphill or downhill, the rider's limbs cannot provide support on the electric wheelchair, which may cause excessive forward leaning or backward leaning during the downhill or uphill process, resulting in poor comfort and safety.
[0004] Therefore, if an automatic balancing structure of electric wheelchair can be developed to automatically lift and adjust the level, the safety and comfort of the electric wheelchair when riding can be greatly improved, which is the problem that the inventor wants to improve.
[0005] Therefore, the inventor has the idea of creation, and designs it with years of experience. After many discussions and sample tests, and many revisions and improvements, the utility model is finally developed. CONTENT OF THE UTILITY MODEL
[0006] Technical features for solving problems:
[0007] This utility model discloses an automatic balancing structure for an electric wheelchair. The electric wheelchair includes a seat assembly, a rear wheel assembly, and a front wheel assembly. Two power units are installed on the electric wheelchair to provide power for movement. The seat assembly has a frame with two armrests, a user interface, a seat cushion, a backrest, a battery, and a main controller. The main controller is connected to a gyroscope and a speed sensor. The gyroscope detects the ground angle and transmits the result to the main controller. The main controller then controls the extension and retraction of the rear wheel assembly based on the ground angle. The battery provides power to the main controller, the rear wheel assembly, the front wheel assembly, and the power units, ensuring smooth operation of all components. The rear wheel assembly has a mounting mechanism for... The chair frame has two support tube assemblies extending downwards at both sides of the rear. Each support tube assembly has an outer tube and an inner tube that are fitted together. The outer tube and the inner tube are connected by a telescopic device. By actuating the telescopic device, the inner tube can perform coaxial telescopic displacement within the outer tube. A rear wheel is pivotally mounted at the end of each support tube assembly. The front wheel assembly has two actuators and two front wheel frames. The two actuators are respectively installed on the front sides of the bottom surface of the chair frame. Each front wheel frame has a main body section and an extension section. The main body section is horizontally arranged and fitted with the actuator, allowing the main body section to be driven by the actuator to produce horizontal displacement. The extension section extends downwards at one end of the main body section, so that the extension section and the support tube assembly form an outward V-shape. A front wheel is pivotally mounted at the end of the extension section of each front wheel frame. Thus, the automatic balancing structure of the electric wheelchair is formed.
[0008] Compared with the effectiveness of existing technologies:
[0009] (I) The electric wheelchair automatic balancing structure of this utility model can correct the angle of the human body after sitting on the electric wheelchair through the rear wheel assembly, so as to avoid the situation of excessive backward leaning when encountering uphill sections and excessive forward leaning when going downhill sections, making the ride relatively comfortable.
[0010] (II) The automatic balancing structure of the electric wheelchair of this utility model can automatically lower the center of gravity of the seat assembly through the front wheel assembly when the electric wheelchair is traveling at a high speed, so that the electric wheelchair can be closer to the ground, thereby avoiding overturning at high speed and greatly increasing the safety of use. Attached Figure Description
[0011] Figure 1 This is a plan view of the present invention.
[0012] Figure 2The state diagram of the utility model when going uphill.
[0013] Figure 3 The state diagram of the utility model when going downhill.
[0014] Figure 4 The state diagram of the utility model when the front wheel frame is extended.
[0015] Symbol explanation:
[0016] The utility model part:
[0017] Chair seat assembly - - - (10) chair frame - - - (11)
[0018] Platform - - - (111) handle - - - (112)
[0019] Handrail - - - (12) user interface - - - (13)
[0020] Chair cushion - - - (14) pressure film - - - (141)
[0021] Chair back - - - (15) battery - - - (16)
[0022] Main controller - - - (17) gyroscope - - - (171)
[0023] Speed sensor - - - (172)
[0024] Rear wheel assembly - - - (20) support tube group - - - (21)
[0025] Outer tube - - - (211) inner tube - - - (212)
[0026] Telescopic device - - - (213) rear wheel - - - (22)
[0027] Front wheel assembly - - - (30) actuator - - - (31)
[0028] Front wheel frame - - - (32) body section - - - (321)
[0029] Extension section - - - (322) front wheel - - - (33)
[0030] Power device - - - (40) DETAILED DESCRIPTION
[0031] For the purpose of further understanding and recognizing the utility model, the following please cooperate with
figure simple explanation
[0032] Generally according to the utility model, first please by Figure 1 As shown in the figure, it has an electric wheelchair, which includes a seat assembly (10), a rear wheel assembly (20) and a front wheel assembly (30), and two power devices (40) are installed on the electric wheelchair to provide power for the electric wheelchair when traveling, wherein the seat assembly (10) has a chair frame (11), which is provided with two armrests (12), a user interface (13), a chair cushion (14), a chair back (15), a battery (16) and a main controller (17), the main controller (17) is connected with a gyroscope (171) and a speed sensor (172), the ground angle is detected by the gyroscope (171), and the detected result is transmitted to the main controller (17), so that the main controller (17) can control the rear wheel assembly (20) to stretch according to the different ground angles, the battery (16) provides the required power to the main controller (17), the rear wheel assembly (20), the front wheel assembly (30) and the power device (40), and the main controller (17), the rear wheel assembly (20), the front wheel assembly (30) and the power device (40) can work smoothly, the rear wheel assembly (20) has two support pipe groups (21) installed on the rear side of the chair frame (11) and inclined downward, both the support pipe groups (21) have an outer pipe (211) and an inner pipe (212) connected, the outer pipe (211) and the inner pipe (212) are connected by a telescopic device (213), the inner pipe (212) can be coaxially telescopic displacement in the outer pipe (211) by the telescopic device (213), and the ends of the two support pipe groups (21) are pivotally provided with a rear wheel (22), the front wheel assembly (30) has two actuators (31) and two front wheel frames (32), the two actuators (31) are respectively installed on the front side of the bottom surface of the chair frame (11), the two front wheel frames (32) each have a body segment (321) and an extension segment (322), the body segment (321) is arranged horizontally and connected with the actuator (31), so that the body segment (321) can be driven by the actuator (31) to produce horizontal displacement, the extension segment (322) is inclined downward from one end of the body segment (321), so that the extension segment (322) and the support pipe group (21) can form an outer eight character shape, and the ends of the extension segments (322) of the two front wheel frames (32) are pivotally provided with a front wheel (33).
[0033] The utility model provides a kind of electric wheelchair automatic balancing structure, wherein the electric wheelchair can be folded.
[0034] The utility model provides a kind of electric wheelchair automatic balancing structure, wherein, platform (111) is equipped on the chair frame (11), so that the battery (16) and the main controller (17) can be fixed on the platform (111).
[0035] The utility model provides a kind of electric wheelchair automatic balancing structure, wherein, handle (112) is equipped on the chair frame (11), so that the electric wheelchair can also be operated in the way of hand pushing.
[0036] The utility model provides a kind of electric wheelchair automatic balancing structure, wherein, pedal (not shown in drawing) is equipped on the chair frame (11), so that the attendant accompanying can stand on the pedal and then be carried forward by the electric wheelchair.
[0037] The utility model provides a kind of electric wheelchair automatic balancing structure, wherein, the user interface (13) is used to provide the rider to operate, the electric wheelchair is controlled to advance, retreat or turn by the user interface (13), and the user interface (13) is a joystick control interface, a key control interface or a panel control interface.
[0038] The utility model provides a kind of electric wheelchair automatic balancing structure, wherein, pressure diaphragm (141) is equipped in the chair pad (14), the pressure diaphragm (141) is used to detect whether the rider is seated on the chair pad (14), to start the main controller (17) to operate after the rider is successfully seated by the pressure diaphragm (141).
[0039] The utility model provides a kind of electric wheelchair automatic balancing structure, wherein, the gyroscope (171) and the speed sensor (172) are directly arranged on the main controller (17).
[0040] The utility model provides a kind of electric wheelchair automatic balancing structure, wherein, the support tube group (21) is an electric cylinder.
[0041] The utility model provides a kind of electric wheelchair automatic balancing structure, wherein, the actuator (31) is a servo motor, the servo motor is equipped with gear (not shown in drawing), and the body section (321) of the front wheel frame (32) is equipped with tooth portion (not shown in drawing), the front wheel frame (32) can be smoothly driven to translate by the actuator (31) by the meshing of the tooth portion and the gear.
[0042] The utility model provides a kind of electric wheelchair automatic balancing structure, wherein, the front wheel (33) is greater than the rear wheel (22).
[0043] The utility model provides a kind of electric wheelchair automatic balancing structure, wherein, the front wheel (33) has the wheel diameter of 16 inch.
[0044] The utility model provides a kind of electric wheelchair automatic balancing structure, wherein, the second power device (40) is hub motor, and the second hub motor is respectively installed on the second front wheel (33).
[0045] When it is used, if uphill section is encountered, the road surface angle can be detected by the gyroscope (171), and then the inner tube (212) is driven to extend by the main controller (17) through the telescopic device (213) (please also refer to the drawing), so that the chair pad (14) can be kept in a horizontal state to prevent the occupant from leaning back excessively. Figure 2 When downhill section is encountered, the road surface angle can also be detected by the gyroscope (171), and then the inner tube (212) is driven to retract greatly by the main controller (17) through the telescopic device (213) (please also refer to the drawing), so that the chair pad (14) can also be kept in a horizontal state to prevent the occupant from leaning forward excessively. Figure 3
[0046] When the speed sensor (172) detects that the speed of the electric wheelchair is too fast (the system is set at 10km / h), the front wheel frame (32) is driven to extend forward by the main controller (17) through the actuator (31), so that the wheelbase of the front wheel (33) and the rear wheel (22) can be enlarged, and the seat assembly (10) is automatically lowered. Figure 4 The electric wheelchair can correct the angle of the human body after being seated by the rear wheel assembly (20), to avoid the situation that the body leans back excessively when uphill section is encountered, and the body leans forward excessively when downhill section is encountered, so that the seat is relatively comfortable.
[0047] When the speed of the electric wheelchair is fast, the center of gravity of the seat assembly (10) can be automatically lowered by the front wheel assembly (30), so that the electric wheelchair can be closer to the ground, to avoid overturning when the speed is relatively high, and the safety of use is multiplied.
[0048] The above description is only a preferred embodiment of the utility model, and cannot limit the range of the utility model; that is, any equivalent change and modification made according to the patent application range of the utility model should still belong to the range covered by the utility model patent.
Claims
1. An electric wheelchair automatic balancing structure, characterized by, The electric wheelchair comprises a seat assembly, a rear wheel assembly and a front wheel assembly, and two power devices are installed on the electric wheelchair to provide power for the electric wheelchair when moving. The seat assembly comprises a seat frame provided with two armrests, a user interface, a seat cushion, a seat back, a battery and a main controller, the main controller is connected with a gyroscope and a speed sensor, the gyroscope is used to detect the ground angle, and the detected result is transmitted to the main controller, and the main controller controls the rear wheel assembly to extend or retract according to the ground angle, the battery provides power for the main controller, the rear wheel assembly, the front wheel assembly and the power device, and the main controller, the rear wheel assembly, the front wheel assembly and the power device can work smoothly. The rear wheel assembly comprises two support pipe groups installed on the rear side of the seat frame and extending downward and obliquely, each of the support pipe groups comprises an outer pipe and an inner pipe connected with each other, the outer pipe and the inner pipe are connected through an extension device, the extension device drives the inner pipe to extend or retract coaxially in the outer pipe, and the end of each of the support pipe groups is pivotally provided with a rear wheel. The front wheel assembly comprises two actuators and two front wheel frames, the two actuators are respectively installed on the front side of the bottom surface of the seat frame, each of the front wheel frames comprises a body segment and an extension segment, the body segment is arranged horizontally and connected with the actuator, so that the body segment can be driven by the actuator to horizontally move, and the extension segment extends downward and obliquely from one end of the body segment, so that the extension segment and the support pipe group form an outward eight-shaped structure, and the end of the extension segment of each of the front wheel frames is pivotally provided with a front wheel.
2. The electric wheelchair automatic balancing structure according to claim 1, wherein The electric wheelchair can be folded.
3. The electric wheelchair automatic balancing structure according to claim 1, wherein The seat frame is provided with a platform, so that the battery and the main controller can be installed and fixed on the platform.
4. The electric wheelchair automatic balancing structure according to claim 1, wherein The seat frame is provided with a handle.
5. The electric wheelchair automatic balancing structure according to claim 1, wherein The user interface is a joystick control interface.
6. The electric wheelchair automatic balancing structure according to claim 1, wherein The seat cushion is internally provided with a pressure film connected with the main controller.
7. The electric wheelchair automatic balancing structure according to claim 1, wherein The gyroscope and the speed sensor are directly arranged on the main controller.
8. The electric wheelchair automatic balancing structure according to claim 1, wherein The support pipe group is an electric cylinder.
9. The electric wheelchair automatic balancing structure according to claim 1, wherein The front wheel is larger than the rear wheel.
10. The electric wheelchair automatic balancing structure according to claim 1, wherein The two power devices are hub motors, which are respectively installed on the two front wheels.