Multifunctional wheelchair

Abstract

The invention discloses a multifunctional wheelchair in the field of wheelchairs, the multifunctional wheelchair comprises a wheelchair chassis, a seat base and a deflector rod assembly, and a driving wheel set and a steering wheel set with different diameters are arranged on the wheelchair chassis at intervals; lifting equipment is arranged between the seat base and the wheelchair chassis, one end of the lifting equipment is fixedly connected with the wheelchair chassis, the other end of the lifting equipment is rotationally connected with the seat base, and rotary positioning teeth are fixed to the lifting equipment. The deflector rod assembly is mounted on the seat base in a resettable constraint manner; wherein the seat base rotates, the shifting rod assembly is intermittently matched with the rotary positioning teeth, and a structure that the seat base rotates and then is locked is formed; according to the wheelchair base designed in the application, the wheelchair base ascends and descends on the wheelchair chassis through the lifting equipment, the fixed or rotatable state of the wheelchair base is completed through cooperation between the driving shifting rod assembly and the rotary positioning teeth, and in actual use, switching of front drive and rear drive is completed by rotating the wheelchair base.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wheelchairs, in particular to a multifunctional wheelchair. BACKGROUND

[0002] There are as many as 200 brands of wheelchairs on the market in China, and there are thousands of models. It is difficult for a product to adapt to more users, and it is difficult for different patients to be universal. Users often need to purchase multiple types of products to meet daily needs. Users often discover new functional needs according to their own needs in the process of using wheelchairs. Ordinary products are difficult to meet the daily needs of multiple purposes. Moreover, the price of customized products is often too high; the function classification of electric wheelchairs can be divided into indoor, outdoor and road types, and ordinary products are difficult to meet all requirements. These products cannot switch between front drive and rear drive through a rotating base to meet the requirements of the use environment. SUMMARY

[0003] The purpose of the present application is to provide a multifunctional wheelchair to solve the above-mentioned defects in the prior art.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: The present application discloses a multifunctional wheelchair, which comprises a wheelchair chassis, a driving wheel group and a steering wheel group with different diameters are arranged on the wheelchair chassis; a seat base, a lifting device is arranged between the seat base and the wheelchair chassis, one end of the lifting device is fixedly connected to the wheelchair chassis, the other end is rotatably connected to the seat base, and a rotating positioning tooth is fixed on the lifting device; a lever assembly, the lever assembly is installed on the seat base and can be reset and constrained; Wherein, the seat base rotates, the lever assembly intermittently cooperates with the rotating positioning tooth, and a structure of rotating and relocking of the seat base is formed.

[0005] Further schemes of the present application, the lever assembly comprises a limiting lever block and a rod, the limiting lever block is fixedly connected to the rod, the rod is installed on the seat base through a torsional spring, and the limiting lever block cooperates with the rotating positioning tooth to fix the seat base.

[0006] Further schemes of the present application, a plurality of tooth openings are arranged on the rotating positioning tooth, and the plurality of tooth openings are uniformly arranged on the edge of the rotating positioning tooth.

[0007] A further embodiment of this application includes a backrest component and an electric pedal component. One end of the seat base is hinged to the backrest component, and the other end is movably connected to the electric pedal component. The backrest component is adjusted to adjust the angle between itself and the seat base via a motor drive. A first telescopic component is connected between the seat base and the wheelchair chassis, and a second telescopic component is connected between the electric pedal component and the seat base. Activating the first and second telescopic components adjusts the angles of the seat base and the electric pedal component accordingly.

[0008] In a further embodiment, the backrest component includes a backrest body and an armrest assembly; The armrest assembly includes an armrest body and a ratchet. The ratchet is mounted on the backrest body, and one end of the armrest body is fixed by a slot in the armrest body and a spline shaft at the rotation center of the ratchet.

[0009] In a further embodiment, the length of the handrail body is adjustable; the handrail body includes a connector, a first tube, and a second tube; the connector is fixedly connected to the first tube and the mounting base; the first tube is inserted into the cavity of the second tube, and a first fastener is installed on the second tube, the first fastener being used for tensioning and fixing between the walls of the second tube and the first tube.

[0010] In a further embodiment, the seat base is provided with a standing bracket, which includes a hinged first frame and a second frame; The first frame is rotatably connected to the lifting device, the second frame is fixedly connected to the seat base, and the first telescopic member is connected between the first frame and the second frame.

[0011] In a further embodiment, the electric pedal component is Z-shaped, and a roller is installed at the end of the electric pedal component away from the seat base.

[0012] In a further embodiment, the backrest component, the electric pedal component, and the seat base can be arranged horizontally.

[0013] The beneficial effects of this application are as follows: The wheelchair base designed in this application is raised and lowered on the wheelchair chassis by a lifting device. At the same time, the wheelchair base is fixed or rotatable by the cooperation between the drive lever assembly and the rotating positioning teeth. In actual use, the front-wheel drive and rear-wheel drive can be switched by rotating the wheelchair base.

[0014] In addition, the wheelchair is equipped with an adjustable backrest. The wheelchair base is driven by a first telescopic component, and the electric pedal is driven by a second telescopic component, allowing the wheelchair to be in a lying position, a standing position, or a state in between. The wheelchair posture adjustment is diversified, further realizing the diversification of functions. The state switching is simple, and it can be used for multiple purposes, with a variety of functions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the multifunctional wheelchair in the embodiments of this application; Figure 2 This is a structural schematic diagram of the multifunctional wheelchair in the standing posture of an embodiment of this application; Figure 3 This is a structural schematic diagram of the multifunctional wheelchair in a lying position as described in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the multifunctional wheelchair in the rotating state in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the lifting device and the mounting location of the standing bracket in the embodiments of this application; Figure 6 This is a schematic diagram of the installation of the ratchet and connector in an embodiment of this application; Figure 7 This is a schematic diagram of the connection between the armrest assembly and the backrest component in an embodiment of this application.

[0016] The components include: 1. Backrest assembly; 2. Seat base; 3. Electric pedal assembly; 31. Follower rod; 4. Standing bracket; 41. First frame; 42. Second frame; 5. Lever assembly; 6. Lifting device; 7. Armrest assembly; 71. Backrest body; 9. Fixed shaft; 10. First bearing; 11. Second bearing; 12. Rotary positioning tooth; 13. Wheelchair chassis; 14. First telescopic component; 15. Second telescopic component; 16. Limiting block; 17. Rod; 29. ​​First fastener; 210. Mounting base; 211. Ratchet; 212. Splined shaft; 213. Connector; 214. First pipe fitting; 215. Second pipe fitting; 216. Second fastener. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0018] like Figure 1 and Figure 5As shown, this application discloses an embodiment of a multifunctional wheelchair, which includes a wheelchair chassis 13, a seat base 2, and a lever assembly 5. The wheelchair chassis 13 is provided with drive wheel sets and steering wheel sets of different diameters at intervals. A lifting device 6 is provided between the seat base 2 and the wheelchair chassis 13. One end of the lifting device 6 is fixedly connected to the wheelchair chassis 13, and the other end is rotatably connected to the seat base 2. A rotary positioning tooth 12 is fixed on the lifting device 6. The lever assembly 5 is installed on the seat base 2 in a reset and constrained manner. The seat base 2 rotates, and the lever assembly 5 intermittently engages with the rotary positioning tooth 12 to form a structure in which the seat base 2 rotates and then locks.

[0019] When in use, the wheelchair can be switched between locked and rotatable states by using the lever assembly 5, thus switching between front-wheel drive and rear-wheel drive modes. For example, in front-wheel drive mode, the large-diameter drive wheels are in front, which greatly improves the wheelchair's obstacle-crossing ability, giving it the obstacle-crossing capability of a road-type wheelchair. At the same time, when the large wheels are in front, the turning radius of the wheelchair is also significantly reduced, allowing it to turn and make U-turns even in narrow spaces.

[0020] In some embodiments, a multifunctional wheelchair is specifically designed as follows; As attached Figures 1 to 3 As shown, in this embodiment, the wheelchair also includes a backrest component 1 and an electric pedal component 3. One end of the seat base 2 is hinged to the backrest component 1, and the other end is movably connected to the electric pedal component 3. The backrest component 1 is adjusted by a motor drive to adjust the angle between itself and the seat base 2. A first telescopic component 14 is movably connected between the seat base 2 and the wheelchair chassis 13. A second telescopic component 15 is hinged between the electric pedal component 3 and the seat base 2. In this embodiment, a gearbox is installed on the seat base. The output end of the gearbox is connected to the backrest component 1, and the input end is connected to the motor output shaft. The motor drive realizes the angle adjustment of the backrest component. Specific details are mature existing technology and will not be elaborated here. In addition, both the first telescopic component 14 and the second telescopic component 15 use push rod motors. Two push rod motors are used to adjust the setting angle of the electric pedal component 3 and the seat base 2. In a further embodiment, a standing bracket 4 is provided on the seat base 2, providing a mounting surface and improving the stability of the seat base 2 during adjustment. The standing bracket 4 includes a hinged first frame 41 and a second frame 42. The first frame 41 is rotatably connected to the lifting device 6, and the second frame 42 is fixedly connected to the seat base 2. The fixed end of the first telescopic member 14 is hinged to the first frame 41, and the driving end is movably connected between the first and second frames 42. In a specific design, for example, a slide rail assembly is provided on the second frame 42, and the driving end of the first telescopic member 14 connects to the slider in the slide rail assembly. The first telescopic member 14 is activated to adjust the seat base 2.

[0021] When the wheelchair needs to be laid flat, start the motor to adjust the backrest component 1 and seat base 2 to 180 degrees. Start the second telescopic component 15 to drive the electric pedal component 3 to dock with the seat base 2, while also ensuring that the two are set at 180 degrees. Finally, the backrest component 1, seat base 2 and electric pedal component 3 are horizontally docked to complete the flat adjustment. When the wheelchair needs to use the standing function, start the motor to adjust the backrest component 1 and the seat base 2 to about 170 degrees. Adjust the specific angle according to the actual needs. Start the first telescopic component 14 to complete the rotation of the seat base 2. The angle between the first frame 41 and the second frame 42 is about 80 degrees. Adjust the angle according to the actual needs. Finally, start the second telescopic component 15 to complete the docking of the electric pedal component 3 and the seat base 2. The adjusted wheelchair can assist the patient to stand and perform a series of rehabilitation exercises.

[0022] The electric pedal component 3 here has a movable cavity, and a follower rod 31 is hinged to the seat base 2. The follower rod 31 is placed in the movable cavity. The electric pedal component 3 is Z-shaped, and a roller is installed at the end of the electric pedal component 3 away from the seat base 2.

[0023] As attached Figure 5 As shown, in this embodiment, the lifting component uses an electric cylinder. The telescopic rod of the electric cylinder is rotatably connected to the first frame 41. Specifically, the telescopic rod of the electric cylinder passes through the mounting hole of the first frame 41. The first bearing 10 and the second bearing 11 are installed in sequence above and below the mounting hole. The first frame 41 rotates by relying on the two bearings. The end of the telescopic rod of the electric cylinder is fixed with a fixed shaft 9 to restrict the first bearing 10.

[0024] In this embodiment, the lever assembly 5 includes a limiting block 16 and a rod 17. The limiting block 16 is fixedly connected to the rod 17, and the rod 17 is mounted on the seat base 2 by a torsion spring. The limiting block 16 cooperates with the rotating positioning tooth 12 to fix the seat base 2.

[0025] The rotating positioning tooth 12 has two toothed openings arranged radially. In actual manufacturing, multiple toothed openings can be set according to the user. Multiple toothed openings are evenly arranged on the edge of the rotating positioning tooth 12. When in use, the lever 17 is moved to disengage the limiting block 16 from the toothed opening. At this time, the seat base 2 can rotate freely. When the lever 17 is released, the limiting block 16 engages with the toothed opening again under the action of the torsion spring, thereby locking the seat base 2.

[0026] As attached Figure 3 , Figure 6 , Figure 7 As shown, in this embodiment, the backrest component 1 includes a backrest body 71 and an armrest assembly 7; The armrest assembly 7 includes an armrest body and a ratchet 211. The ratchet 211 is mounted on the backrest body 71. One end of the armrest body is fixed by a slot in the armrest body and a splined shaft 212 at the rotation center of the ratchet 211.

[0027] The length of the handrail body is adjustable; the handrail body includes a connector 213, a first tube 214, and a second tube 215; the connector 213 is fixedly connected to the first tube 214 and the mounting base 210; the first tube 214 is inserted into the cavity of the second tube 215, and a first fastener 29 is installed on the second tube 215. The first fastener 29 is used for tensioning and fixing between the tube walls of the second tube 215 and the first tube 214. The connector 213 and the first tube 214 are locked together using a second fastener 216. In this embodiment, both fasteners are screws, and the second tube 215 and the first tube 214 are in contact through a plastic part.

[0028] During use, the installation angle of the handrail body is adjusted by ratchet 211. The ratchet 211 used here is a 10-level adjustable model. The adjustment is achieved by plugging in two tubes and making telescopic adjustments to complete the adjustment of the length of the handrail body, thereby improving the patient's comfort.

[0029] For specific use, Patients can adjust the angle and length of the handrail according to the usage environment and their own needs; Furthermore, the main feature of this wheelchair's multi-functionality lies in the angle adjustment between the backrest component 1, the seat base 2, and the electric foot pedal component 3, which can achieve a flat reclining structure, realizing the function of a bed, making it convenient for patients to lie down and rest; in actual use, the angle between the backrest component 1, the seat base 2, and the electric foot pedal component 3 can be adaptively adjusted to achieve multiple posture adjustments; When the backrest component 1, seat base 2, and electric pedal component 3 are tilted vertically as a whole, the mechanism that assists the patient in standing can be switched to assist the patient's rehabilitation. Finally, through the intermittent cooperation design of the rotating positioning tooth 12 and the limiting block 16, the seat base 2 is rotated, and the wheelchair can be switched to front-wheel drive mode to facilitate the patient's crossing of obstacles.

[0030] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

Claims

1. A multi-functional wheelchair, characterized by, The wheelchair chassis is provided with driving wheel groups and steering wheel groups with different diameters at intervals; The seat base is provided with lifting equipment between the seat base and the wheelchair chassis, one end of the lifting equipment is fixedly connected to the wheelchair chassis, the other end is rotatably connected to the seat base, and a rotating positioning tooth is fixed on the lifting equipment; The dial lever assembly is installed on the seat base and can be reset; The seat base rotates, the dial lever assembly intermittently cooperates with the rotating positioning tooth, and the rotating locking structure of the seat base is formed. The dial lever assembly includes a limiting dial block and a rod, the limiting dial block is fixedly connected to the rod, the rod is installed on the seat base through a torsional spring, and the limiting dial block cooperates with the rotating positioning tooth to fix the seat base.

2. The multi-functional wheelchair according to claim 1, characterized by A plurality of tooth openings are provided on the rotating positioning tooth, and the plurality of tooth openings are uniformly arranged on the edge of the rotating positioning tooth.

3. The multi-functional wheelchair according to claim 1, wherein It also includes a backrest component and an electric pedal component, one end of the seat base is hingedly connected to the backrest component, the other end is movably connected to the electric pedal component, the backrest component is driven by the motor to adjust the included angle between the seat base; the seat base is connected with the first telescopic component, the electric pedal component and the seat base are connected with the second telescopic component, and the angles of the seat base and the electric pedal component are adjusted by starting the first telescopic component and the second telescopic component.

4. The multi-functional wheelchair according to claim 1, characterized by The backrest component includes a backrest body and a handrail assembly; 5. The multi-functional wheelchair according to claim 4, wherein The handrail assembly is installed on the backrest body through a restraint component, and the restraint component is used to adjust the installation angle of the handrail assembly. The length of the handrail body is adjustable; the handrail body includes a connecting piece, a first pipe and a second pipe; the connecting piece is fixedly connected to the first pipe and the mounting seat; the first pipe is inserted into the lumen of the second pipe, the second pipe is provided with a first fastener, and the first fastener is used for tensioning and fixing between the second pipe and the first pipe wall.

6. The multi-functional wheelchair according to claim 5, wherein The seat base is provided with a standing bracket, the standing bracket includes a hingedly connected first bracket body and a second bracket body; 7. The multi-functional wheelchair according to claim 4, wherein The first bracket body is rotatably connected to the lifting equipment, the second bracket body is fixedly connected to the seat base, and the first telescopic component connects between the first bracket body and the second bracket body. The electric pedal component is Z-shaped, one end of the electric pedal component away from the seat base is provided with a roller for supporting the stability of the wheelchair when standing.

8. The multi-functional wheelchair according to claim 4, wherein The backrest component, the electric pedal component and the seat base can be combined and adjusted to realize multi-posture adjustment of the wheelchair.

9. The multi-functional wheelchair according to any one of claims 4 to 8, characterized by, ​

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