Barrier-free passing wheelchair

Abstract

According to the barrier-free passing wheelchair, a crawler belt assembly with the lower end rotationally connected to a frame assembly is arranged on the rear side of the frame assembly, and a pitching driving device arranged on the frame assembly is connected with the crawler belt assembly; a pitching driving device adjusts the pitching angle of the crawler belt assembly to enable the crawler belt assembly to be in contact with the stairs or folded on the rear side of the frame assembly when the crawler belt assembly goes up and down the stairs or the crawler belt assembly is folded on the flat road surface, and the frame assembly is provided with a power driving device connected with the crawler belt assembly and the rear wheels. The track assembly is driven to walk during uphill and downhill or the rear wheels are driven to walk on a flat road surface. The problem that a traditional wheelchair is inconvenient to go up and down a bus and go up and down a slope is solved, the wheelchair is prevented from slipping or being out of control when going up and down stairs, the stable running state of the wheelchair is kept, the risk that a user falls down is reduced, automatic walking of the wheelchair on a flat road is achieved, pushing is not needed, and convenient traveling conditions are provided for people who have difficulty in moving.

Description

Technical Field

[0001] This utility model belongs to the field of mobility tool technology, specifically relating to an accessible wheelchair. Background Technology

[0002] A wheelchair is a chair equipped with wheels that can help replace walking. It is an important mobility tool for the injured, sick, and disabled to use for home rehabilitation, transportation, medical treatment, and outdoor activities. Wheelchairs not only meet the mobility needs of people with limb disabilities and those with limited mobility, but more importantly, they facilitate the movement and care of family members, and enable patients to exercise and participate in social activities with the help of wheelchairs.

[0003] In the existing technology, wheelchairs can usually only travel on flat surfaces. When going up and down stairs, they usually need to use a wheelchair docking car for assistance. When going up and down slopes, getting on and off buses, or going to the toilet, they need to rely on the help of others or use barrier-free facilities to solve the problem of passage. The operation is very inconvenient and is greatly limited by the space where it is used. Therefore, in order to facilitate travel, it is necessary to improve the walking structure of wheelchairs. Utility Model Content

[0004] The technical problem solved by this utility model is to provide an accessible wheelchair. Based on the usage environment of the wheelchair, the walking structure of the wheelchair is optimized. A track assembly with an angle adjustable by a pitch drive device is installed on the frame assembly, providing conditions for the wheelchair to move up and down stairs or slopes. A power drive device on the frame assembly drives the rear wheels or track assembly according to the usage scenario of the wheelchair. This enables the track assembly to move when going up and down slopes or getting on and off public transportation, or the rear wheels to move on flat roads. This solves the problem of inconvenience for traditional wheelchairs when getting on and off public transportation or going up and down slopes. It can effectively prevent the wheelchair from slipping or losing control when going up and down stairs, maintain the stable driving state of the wheelchair, greatly reduce the risk of users falling, and enable the wheelchair to move automatically on flat roads without pushing. It provides convenient travel conditions for people with mobility impairments, reduces the impact of the applicable environment on the wheelchair, and improves comfort and safety.

[0005] The technical solution adopted by this utility model is: an accessible wheelchair, including a frame assembly, front wheels and rear wheels respectively located at the front and rear ends of the lower end of the frame assembly, an armrest assembly located in the middle of the vertical section of the frame assembly, and a seat cushion located on the frame assembly. The rear side of the frame assembly is provided with a track assembly whose lower end is rotatably connected to the frame assembly, and a pitch drive device located on the frame assembly is connected to the track assembly. The pitch drive device adjusts the pitch angle of the track assembly so that the track assembly contacts the stairs when going up or down stairs or folds back to the rear side of the frame assembly when on a flat surface. The frame assembly is provided with a power drive device connected to the track assembly and the rear wheels. By switching the drive mode of the power drive device, the track assembly is driven to walk when going up or down slopes or the rear wheels are driven to walk on flat surfaces.

[0006] The frame assembly includes a vertically arranged backrest assembly and a seat support assembly connected to the lower end of the backrest assembly. Armrest assemblies are provided in the middle of both sides of the backrest assembly. The seat cushion is provided on the seat support assembly, and the front wheel and the rear wheel are respectively located on the front and rear sides of the seat support assembly.

[0007] Furthermore, the seat support assembly includes a seat frame connected to the backrest assembly at its rear end, a front retaining plate connected to the two outer sides of the front end of the seat frame, a main rod connected to the front retaining plate at its front end, a front support located at the front end of the main rod, a front fork located at the lower end of the front support, a diagonal support connected to the rear side of the middle of the front support at its front end, and a rear support connected to the rear end of the diagonal support and connected to the backrest assembly. The front wheel is rotatably mounted on the lower end of the front fork, and the foot pedal located between the two front wheels is fixed in the middle of the diagonal support. The rear ends of the two main rods are rotatably connected to both ends of the rear wheel axle, and the rear wheel located on the outer side of the main rod is fixed to the end of the rear wheel axle. The rear wheel axle is driven by the power drive device to rotate and move.

[0008] Furthermore, the pitch drive device includes an electric telescopic rod and a hydraulic support rod. The lower end of the electric telescopic rod is hinged to a support on the rear side of the lower end of the backrest assembly, and the upper end of the electric telescopic rod is hinged to the middle of the lower end of the track bracket in the track assembly. Track guide wheels are adapted between the side beams on both sides of the track bracket and the left side of the track on the same side. The two track guide wheels are rotatably mounted on both ends of the connecting shaft. The middle of the connecting shaft is hinged to one end of the hydraulic support rod, and the other end of the hydraulic support rod is hinged to the rear side of the upper end of the backrest assembly. Under the support of the hydraulic support rod, the extension and retraction of the track assembly is controlled by the extension and retraction of the track guide wheels at both ends of the connecting shaft along the side beams of the track bracket.

[0009] Furthermore, the power drive device includes a motor and a gearbox installed at the lower rear side of the backrest assembly. The output shaft of the motor is connected to the input shaft of the gearbox. An axle is rotatably mounted at the lower end of the track support. The lower end of the track is adapted to and connected to a track wheel fixed on the axle and located at the lower end of the track support side beam. The upper end of the track is adapted to and connected to a support wheel rotatably supported on the upper end of the track support side beam. The two ends of the axle are rotatably mounted at the rear end of the main rod. A gear fixed on the axle meshes with a gear fixed on one of the output shafts of the gearbox. A drive sprocket fixed on the other output shaft of the gearbox is connected to a driven sprocket fixed on the rear axle via a chain. By switching the transmission direction of the gearbox, the two rear wheels are driven to rotate and walk on flat roads by the motor, or the track adapted to the track wheel is driven to walk when going up and down stairs by the motor.

[0010] Advantages of this utility model compared to the prior art:

[0011] 1. This technical solution is based on the usage site of wheelchairs and optimizes the wheelchair walking structure. It adopts a track assembly on the frame assembly, which is driven by a pitch drive device to adjust its angle, to provide conditions for the wheelchair to walk up and down stairs or slopes. The power drive device on the frame assembly drives the rear wheels or track assembly to walk according to the usage scenario of the wheelchair. This enables the track assembly to walk when going up and down slopes or getting on and off public transportation, or the rear wheels to walk on flat roads, thus solving the problem of inconvenience for traditional wheelchairs when getting on and off public transportation and going up and down slopes.

[0012] 2. The track assembly of this technical solution provides strong adhesion and power transmission during movement, which can effectively prevent the wheelchair from slipping or losing control when going up and down stairs. Even on relatively steep or narrow stairs, it can maintain a stable driving state, greatly reducing the risk of users falling.

[0013] 3. This technical solution uses a hydraulic support rod that is hinged in the middle to the connecting shaft of the track guide wheel that is installed at both ends and is adapted to the track and track support side beam. This provides reliable support for the track assembly pitch adjustment driven by the electric telescopic rod. The position change caused by the pitch angle change of the track assembly is adjusted by the movement of the track guide wheel along the side beam of the track support. There is no need to process holes and slots on the track support, which ensures the structural strength and stability of the track support.

[0014] 4. This technical solution has a novel structure and reasonable design, enabling wheelchairs to move automatically on flat roads without the need for pushing, providing convenient travel conditions for people with mobility impairments, reducing the impact of applicable sites on wheelchairs, and improving comfort and safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model when the seat cushion is removed;

[0017] Figure 3 This is a front view of the chassis assembly and track assembly of this utility model;

[0018] Figure 4 This is a left view of the chassis assembly and track assembly of this utility model;

[0019] Figure 5 This is a schematic diagram of the track assembly structure of this utility model. Detailed Implementation

[0020] The following will be based on the embodiments of this utility model. Figure 1-5The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] It should be noted that, unless otherwise stated herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention 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 of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] Accessible wheelchairs, such as Figure 1-5As shown, the vehicle includes a frame assembly 5, front wheels 4 and rear wheels 2 respectively located at the front and rear ends of the lower end of the frame assembly 5, a handrail assembly 1 located in the middle of the vertical section of the frame assembly 5, and a seat cushion 3 located on the frame assembly 5. A track assembly 6 is provided on the rear side of the frame assembly 5, with its lower end rotatably connected to the frame assembly 5. A pitch drive device on the frame assembly 5 is connected to the track assembly 6, and the pitch drive device adjusts the pitch angle of the track assembly 6 so that it contacts the stairs when going up or down stairs, or folds back to the rear side of the frame assembly 5 when on a flat surface. The frame assembly 5 is provided with a power drive device connected to the track assembly 6 and the rear wheels 2. By switching the drive mode of the power drive device, the track assembly 6 is driven to move up or down slopes, or the rear wheels 2 are driven to move on flat surfaces. In this design, the wheelchair's walking structure is optimized based on the usage environment. A track assembly 6, driven by a pitch drive device, is installed on the frame assembly 5 to adjust its angle, providing conditions for the wheelchair to move up and down stairs or slopes. The power drive device on the frame assembly 5 drives the rear wheels or track assembly 6 according to the wheelchair's usage scenario, enabling the track assembly 6 to move when going up and down slopes or getting on and off public transportation, or the rear wheels to move when on flat ground. This solves the problem of inconvenience for traditional wheelchairs when getting on and off public transportation or going up and down slopes. The track assembly 6 is designed to provide strong adhesion and power transmission during movement, effectively preventing the wheelchair from slipping or losing control when going up and down stairs. Even on relatively steep or narrow stairs, it can maintain a stable driving state, greatly reducing the risk of users falling.

[0024] The specific structure of the frame assembly 5 is as follows: The frame assembly 5 includes a backrest assembly 5-1 arranged vertically and a seat support assembly 5-2 connected to the lower end of the backrest assembly 5-1. Armrest assemblies 1 are provided in the middle of both sides of the backrest assembly 5-1. The seat cushion 3 is provided on the seat support assembly 5-2, and the front wheel 4 and the rear wheel 2 are respectively provided on the front and rear sides of the seat support assembly 5-2.

[0025] The specific structure of the seat support assembly 5-2 is as follows: The seat support assembly 5-2 includes a seat frame 5-21 connected to the backrest assembly 5-1 at its rear end, a front retaining plate 5-22 connected to the two outer sides of the front end of the seat frame 5-21, a main rod 5-23 connected to the front retaining plate 5-22 at its front end, a front support 5-24 located at the front end of the main rod 5-23, a front fork 5-25 located at the lower end of the front support 5-24, a diagonal support 5-26 connected to the rear side of the middle of the front support 5-24 at its front end, and a rear support 5-27 connected to the rear end of the diagonal support 5-26 and connected to the backrest assembly 5-1. The front wheel 4 is rotatably mounted on the front fork 5-25. -25 The foot pedal 5-28, located between the two front wheels 4, is fixed to the middle of the inclined support 5-26. The rear ends of the two main rods 5-23 are rotatably connected to the two ends of the rear wheel axle 9, and the rear wheel 2 located outside the main rod 5-23 is fixed to the end of the rear wheel axle 9. The rear wheel axle 9 drives the rear wheel 2 to rotate and move under the drive of the power drive device. The key point here is the structure of the rear wheel 2 set on the frame assembly 5. The specific structure of the frame assembly 5 will not be described in detail. In addition to the above structure, other frame assemblies 5 with two rear wheels 2 fixedly installed on the rear wheel axle 9 can also be used, all of which can meet the requirements of this solution.

[0026] The specific structure of the pitch drive device is as follows: The pitch drive device includes an electric telescopic rod 7 and a hydraulic support rod 8. The lower end of the electric telescopic rod 7 is hinged to a support on the rear side of the lower end of the backrest assembly 5-1, and the upper end of the electric telescopic rod 7 is hinged to the middle of the lower end of the track bracket 6-1 in the track assembly 6. Track guide wheels 6-2 are adapted between the side beams on both sides of the track bracket 6-1 and the left side of the track 6-3 on the same side. The two track guide wheels 6-2 are rotatably mounted on both ends of the connecting shaft. The middle of the connecting shaft is hinged to one end of the hydraulic support rod 8, and the other end of the hydraulic support rod 8 is hinged to the rear side of the upper end of the backrest assembly 5-1, and is supported by the hydraulic support rod 8. The extension and retraction of the track assembly 6 is controlled by the extension and retraction of the electric telescopic rod 7, which controls the movement of the track guide wheels 6-2 at both ends of the connecting shaft along the side beam of the track bracket 6-1. In the above structure, a hydraulic support rod 8 is used, which is hinged in the middle of the connecting shaft with the track guide wheels 6-2 installed at both ends and adapted to the track 6-3 and the side beam of the track bracket 6-1. This provides reliable support for the electric telescopic rod 7 to drive the track assembly 5 to adjust pitch. The position change caused by the change in pitch angle of the track assembly is adjusted by the movement of the track guide wheels 6-2 along the side beam of the track bracket 6-1. There is no need to machine holes or slots on the track bracket 6-1, which ensures the structural strength and stability of the track bracket 6-1.

[0027] The specific structure of the power drive device is as follows: The power drive device includes a motor 10 and a gearbox 11 installed on the rear side of the lower end of the backrest assembly 5-1. The output shaft of the motor 10 is connected to the input shaft of the gearbox 11. An axle 6-5 is rotatably mounted on the lower end of the track bracket 6-1. The lower end of the track 6-3 is adapted to and connected to a track wheel 6-4 fixed on the axle 6-5 and located at the lower end of the side beam of the track bracket 6-1. The upper end of the track 6-3 is rotatably supported on the side beam of the track bracket 6-1. The support wheel 6-6 at the end is adapted and connected, and the two ends of the axle 6-5 are rotatably mounted on the rear end of the main rod 5-23; the gear fixed on the axle 6-5 meshes with the gear fixed on one of the output shafts of the gearbox 11, and the driving sprocket 12 fixed on the other output shaft of the gearbox 11 is connected to the driven sprocket 13 fixed on the rear axle 9 via a chain 14, and the transmission direction of the gearbox 11 is switched (the output direction is switched by the intermediate gear of the gearbox 11) to achieve the electric power supply on the flat road. The motor 10 drives the two rear wheels 2 to rotate and move, or drives the track 6-3, which is adapted to the track wheels 6-4, to move when going up or down stairs. The transmission direction is switched through the gearbox 11. The gearbox 11 switch button and the start / stop buttons for the motor 10 and the electric telescopic rod 7 are located on the handrail assembly 1 for easy operation by the user according to the usage scenario. The power required by the motor 10 and the electric telescopic rod 7 is provided by the battery located on the frame assembly 5. When the wheelchair is moving on the ground, the user switches the gearbox 11 to drive the two rear wheels 2 to move. When going up or down slopes or stairs, the user controls the electric telescopic rod 7 to adjust the pitch position of the track assembly 6 to contact the slope or stairs, switches the gearbox 11 to drive the track wheels 6-4 to rotate, and then drives the track 6-3 to move. This structure mainly utilizes the switching function of the existing gearbox transmission method and realizes the switching between two walking modes under the drive of a single motor. The specific switching structure is an existing structure and will not be described in detail here.

[0028] This technical solution features a novel structure and a reasonable design, enabling wheelchairs to move automatically on flat roads without the need for pushing. It provides convenient travel conditions for people with mobility impairments, reduces the impact of applicable sites on wheelchairs, and improves comfort and safety.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A barrier-free wheelchair, comprising a frame assembly (5), front wheels (4) and rear wheels (2) respectively disposed at the front and rear ends of the lower end of the frame assembly (5), an armrest assembly (1) disposed in the middle of the vertical section of the frame assembly (5), and a seat cushion (3) disposed on the frame assembly (5), characterized in that: The rear side of the frame assembly (5) is provided with a track assembly (6) whose lower end is rotatably connected to the frame assembly (5). The pitch drive device on the frame assembly (5) is connected to the track assembly (6). The pitch drive device adjusts the pitch angle of the track assembly (6) so that the track assembly (6) contacts the stairs when going up or down stairs or folds back to the rear side of the frame assembly (5) when on a flat road. The frame assembly (5) is provided with a power drive device connected to the track assembly (6) and the rear wheel (2). By switching the drive mode of the power drive device, the track assembly (6) is driven to walk when going up or down slopes or the rear wheel (2) is driven to walk when on a flat road.

2. The barrier-free wheelchair according to claim 1, characterized in that: The frame assembly (5) includes a vertically arranged backrest assembly (5-1) and a seat support assembly (5-2) connected to the lower end of the backrest assembly (5-1). Armrest assemblies (1) are provided in the middle of both sides of the backrest assembly (5-1). The seat cushion (3) is provided on the seat support assembly (5-2), and the front wheel (4) and the rear wheel (2) are respectively provided on the front and rear sides of the seat support assembly (5-2).

3. The barrier-free wheelchair according to claim 2, characterized in that: The seat support assembly (5-2) includes a seat frame (5-21) connected to the backrest assembly (5-1) at its rear end, a front retaining plate (5-22) connected to the two outer sides of the front end of the seat frame (5-21), a main rod (5-23) connected to the front retaining plate (5-22) at its front end, a front support (5-24) located at the front end of the main rod (5-23), a front fork (5-25) located at the lower end of the front support (5-24), and a diagonal support (5-26) connected to the rear side of the middle of the front support (5-24) at its front end. 6) The rear support (5-27) is connected to the backrest assembly (5-1) at the rear end. The front wheel (4) is rotatably mounted on the lower end of the front fork (5-25), and the foot pedal (5-28) located between the two front wheels (4) is fixed in the middle of the diagonal support (5-26). The rear ends of the two main rods (5-23) are rotatably connected to the two ends of the rear wheel axle (9), and the rear wheel (2) located outside the main rod (5-23) is fixed to the end of the rear wheel axle (9). The rear wheel axle (9) drives the rear wheel (2) to rotate and walk under the drive of the power drive device.

4. The barrier-free wheelchair according to claim 3, characterized in that: The pitch drive device includes an electric telescopic rod (7) and a hydraulic support rod (8). The lower end of the electric telescopic rod (7) is hinged to the support on the rear side of the lower end of the backrest assembly (5-1), and the upper end of the electric telescopic rod (7) is hinged to the middle of the lower end of the track bracket (6-1) in the track assembly (6). Track guide wheels (6-2) are adapted between the side beams on both sides of the track bracket (6-1) and the left side of the track (6-3) on the same side. The two track guide wheels (6-2) are rotatably installed on both ends of the connecting shaft. The middle part of the connecting shaft is hinged to one end of the hydraulic support rod (8), and the other end of the hydraulic support rod (8) is hinged to the rear side of the upper end of the backrest assembly (5-1). Under the support of the hydraulic support rod (8), the track assembly (6) is retracted and extended by the extension and retraction of the track guide wheels (6-2) at both ends of the connecting shaft along the side beam of the track bracket (6-1).

5. The barrier-free wheelchair according to claim 4, characterized in that: The power drive device includes a motor (10) and a gearbox (11) mounted on the rear side of the lower end of the backrest assembly (5-1). The output shaft of the motor (10) is connected to the input shaft of the gearbox (11). An axle (6-5) is rotatably mounted on the lower end of the track bracket (6-1). The lower end of the track (6-3) is adapted to and connected to a track wheel (6-4) fixed on the axle (6-5) and located at the lower end of the side beam of the track bracket (6-1). The upper end of the track (6-3) is adapted to and connected to a support wheel (6-6) rotatably supported on the upper end of the side beam of the track bracket (6-1). The axle (6-5) Both ends are rotatably mounted on the rear end of the main rod (5-23); the gear fixed on the axle (6-5) meshes with the gear fixed on one of the output shafts of the gearbox (11), the driving sprocket (12) fixed on the other output shaft of the gearbox (11) and the driven sprocket (13) fixed on the rear wheel axle (9) are connected by a chain (14), and by switching the transmission direction of the gearbox (11), the two rear wheels (2) are driven by the motor (10) to rotate and walk on a flat road, or the track (6-3) adapted to the track wheel (6-4) is driven by the motor (10) to walk up and down stairs.

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