TWM662326U - Wheelchair that can safely go up and down stairs - Google Patents

Abstract

A wheelchair that can safely go up and down stairs, the wheelchair that can safely go up and down stairs includes a wheelchair that can safely go up and down stairs, the wheelchair that can safely go up and down stairs includes a chair body, wheels and a lifting arc triangular turntable, and the wheels, the lifting arc triangular turntable and the chair body can be connected to each other by welding, adhesive, interlocking of inner and outer diameter differences or screw locking.

The lifting arc triangle turntable is made of a combination of different sized Lelo triangles, covered with tracks. The corners of the Lelo triangle can be embedded in the gaps of the tracks to move forward or backward stably. When braking, the brake rod can be used to embed the corners of the Lelo triangle or the gaps of the tracks. The bottom of the track that contacts the ground has a plurality of suction cup feet with protruding claws. The suction cup feet are fixed to the track by adhesive, interlocking of the inner and outer diameter differences, or screw locking. The suction cup feet can be made of soft or hard plastic, rubber, silicone or metal to make this series of stable and safe suction cups. The stable and safe suction cups have a plurality of protruding claws. The suction cup foot and the track have a thinner outer edge, which can generate gravity through the weight of the load above, so that the suction cup foot and the outer edge have good adsorption force, and the suction cup foot and the upper part of the outer edge are subjected to atmospheric pressure to generate adsorption force, so that it can have good adsorption ability when walking on terrazzo or waxed flat ground, and can be more stable and have a more solid grip.

Description

Wheelchair that can safely go up and down stairs

This invention is a wheelchair, especially a wheelchair that can safely go up and down stairs, which includes a handle, a main body and a supporting foot. The supporting foot can be a single or multiple pillar-shaped body. The bottom of the pillar that contacts the ground has an expanded base. The base has multiple suction cup feet with protruding claws. The suction cup feet can be made of soft or hard plastic, rubber or metal to form a stable and safe suction cup. The suction cup has good adsorption ability on terrazzo or waxed flat ground.

There are many studies related to wheelchairs that can safely go up and down stairs, which are summarized as follows:

Patent No. M539338 of the Republic of China discloses a manual stair climbing wheelchair, which includes a manual rocker, a seat tilt device, a gearbox and a driven gear set. When the seat of the wheelchair is tilted using the seat tilt device, the front and rear wheels of the wheelchair are driven by the gearbox instead of the driven gear set, and the front and rear wheels can no longer be pushed by hand. Only when the person pushing the wheelchair shakes the manual rocker can the front and rear wheels be driven, so that the wheelchair will not automatically slide down when going up and down stairs.

Patent No. TWM570133 of the Republic of China discloses a wheelchair that can go up and down stairs. It mainly uses an electric wheelchair and a first guide rod obliquely arranged on the wall of the stairs. In addition to providing the electric wheelchair with a grip for movement, the first guide rod also provides a safe and stable grip, so that the electric wheelchair can be safer and more stable when moving on the stairs.

The Republic of China Patent No. M374856 discloses a wheelchair device for convenient stair climbing, comprising a wheelchair body, and a front top support mechanism, a rear top support mechanism and a control mechanism mounted on the wheelchair body. The wheelchair body comprises two rear wheels and two front wheels. The front top support mechanism comprises at least one front top supporter located between the front wheels and the rear wheels and capable of protruding downward to support the ground, the rear top support mechanism comprises at least one rear top supporter located behind the bottom edge of the rear wheels and capable of protruding downward to support the ground, and a middle top supporter located between the bottom edges of the rear wheels and capable of protruding downward to support the ground. The structural design of the top support mechanism that can protrude to support the wheelchair body and slide along the ground can facilitate the wheelchair device to go up or down stairs without causing the wheelchair body to tilt backwards, so it will not cause the wheelchair user to be frightened.

Patent No. TW427159U of the Republic of China discloses a climbing device for a wheelchair, which is assembled on two vertical rods at the front end of the wheelchair. Each vertical rod is provided with a connecting piece, and a pin is passed through it. A shaft is provided between the two connecting pieces, and a stop section with an angle-changing design is provided in the middle part thereof. A T-shaped tube is sleeved on the outside of the shaft. The T-shaped tube is stopped by the stop section and can be swung and positioned relative to the shaft. In order to achieve the purpose of easy disassembly, a connecting pipe fitting that can be engaged with the pin is sleeved on each end of the shaft, and one of the connecting pipe fittings can be retracted and slid relative to the shaft. The connecting pipe fitting can be retracted to easily detach from the pin or be assembled with the pin, thereby achieving the purpose of easy disassembly.

Chinese Patent No. CN116831831A discloses a stair climbing walking mechanism and a wheelchair and a medical bed having the same, which comprises: a transition mounting support, a gyroscope for monitoring the balance state of the transition mounting support is provided in the middle of the transition mounting support; a telescopic bearing rod, the telescopic bearing rod has four groups and is arranged around the bottom of the transition mounting support, the gyroscope is connected to the telescopic bearing rod by electrical signals and controls the telescopic state of the telescopic bearing rod; there are two groups of double-head spindle motors and they are respectively fixed horizontally at adjacent The running ends of two telescopic bearing rods; triangular wheel frames, there are multiple sets of triangular wheel frames, the output shaft of the double-head spindle motor is fixedly connected to the center of the triangular wheel frame on the corresponding side; the running wheel set, the end edge of each triangular wheel frame is rotatably connected with the running wheel set; the control system, the control system is respectively connected to the gyroscope, the telescopic bearing rod, the double-head spindle motor, and the running wheel set electrical signal, and the control system controls the rotation state of the running wheel set. The invention has strong passability, is easy to use, and is suitable for the elderly to travel.

Chinese patent CN116115435A discloses a wheelchair capable of climbing stairs, which comprises a wheelchair body, universal wheels respectively arranged at the bottom of both sides of the front end of the wheelchair body and obstacle-crossing mechanisms respectively arranged at the bottom of both sides of the rear end, the obstacle-crossing mechanism comprising an obstacle-crossing wheel disc connected to the wheelchair body through a wheel shaft, a plurality of arc-shaped obstacle-crossing wheel petals arranged at intervals along the circumference of the obstacle-crossing wheel disc, and wheel petal fixing frames and wheel petal locking rods corresponding to the obstacle-crossing wheel petals one by one, and a plurality of arc-shaped obstacle-crossing wheel petals arranged at intervals along the circumference of the obstacle-crossing wheel disc, and a plurality of arc-shaped obstacle-crossing wheel petals arranged at intervals along the circumference of the obstacle-crossing wheel disc, and a plurality of arc-shaped obstacle-crossing wheel petals corresponding to the obstacle-crossing wheel petals one by one. One end of the flap fixing frame is connected to the obstacle-crossing wheel disc, and the other end is hinged to the middle of the corresponding obstacle-crossing flap through the flap shaft. The flap shaft is provided with a torsion spring whose two ends are respectively connected to the corresponding obstacle-crossing flap and the flap fixing frame. The flap locking rod can move radially along the corresponding obstacle-crossing wheel disc to lock or unlock the position of the corresponding obstacle-crossing flap; the wheelchair body is connected to a flap locking mechanism for driving each flap locking rod to move synchronously radially along the corresponding obstacle-crossing wheel disc. The stair-climbing wheelchair provided in this application can facilitate users to climb stairs safely and steadily.

Chinese Patent No. CN116035814A discloses a leg-foot type climbing wheelchair based on Lello triangle and a climbing and turning method, which relates to the technical field of wheelchairs, and comprises: a chair frame, with wheels symmetrically arranged on both sides; a climbing leg-foot device installed on both sides of the chair frame, and the climbing leg-foot device comprises four climbing telescopic legs (a rounded rectangular frame is fixed on the top of the climbing telescopic legs, and the rounded rectangular frame is fixedly connected to the chair frame, and a Lello triangle is installed in the rounded rectangular frame). The rotor, the input shaft of the Lello triangle rotor is connected to the power output shaft of the climbing power output source, and the climbing leg and foot device plays the role of climbing; the supporting leg and foot device is installed under the chair body frame, and the supporting leg and foot device plays the role of hoist turning. The present invention cleverly utilizes the principle of Lello triangle, its design is scientific, its structure is reasonable, it is stable and safe to use, and its transmission efficiency and automation degree are high, the running noise is low, light weight, climbing and turning are flexible, and easy to control.

Chinese patent CN115919566A discloses a self-balancing stair climbing wheelchair, which includes a crawler climbing mechanism, a universal wheel rocking mechanism, a directional wheel rocking mechanism and a control system. The universal wheel rocking mechanism is equipped with two universal wheels, and the directional wheel rocking mechanism is equipped with two directional wheels. When climbing stairs, the universal wheels and the directional wheels are retracted to make the crawler climbing mechanism touch the ground and drive the wheelchair to move forward; the directional wheel rocking mechanism can be controlled by the The control system automatically adjusts to adapt to the terrain by adjusting the position of the directional wheels, so that the seat automatically maintains a horizontal position; the invention has a simple structure, so its cost is relatively low; the crawler climbing mechanism is tilted and fixed under the seat, so that the sitting posture of the passenger is close to horizontal when the wheelchair climbs the stairs, and the overall center of gravity is low, and it is not easy to tip over; the self-balancing function reduces manual operations, avoids some risks of manual operations, lowers the operating threshold and improves safety.

Universal wheels are so-called movable casters, and their structure allows 360-degree horizontal rotation. There are two types of casters: movable casters and fixed casters. Fixed casters do not have a rotation structure and cannot rotate horizontally but only vertically. These two types of casters are generally used in combination, for example, the structure of a trolley is two fixed wheels in the front and two movable universal wheels in the back near the push handle. Onmi Wheel (universal wheel) can be installed on the bracket of the caster wheel and can rotate 360 degrees horizontally in dynamic or static load, and can change the direction of movement at any time.

Chinese patent CN115252295A discloses a wheelchair for climbing stairs and driving on flat ground, which is mainly composed of five parts: a driving system, a climbing system, a control system, a power supply system, and a comfort system; a DC motor 2 at the front end of the right side of the wheelchair drives a planetary gear train 21 of the right front wheel, a DC motor 20 at the rear end of the right side drives a planetary gear train 22 of the right rear wheel, a DC motor 23 at the front end of the left side drives a planetary gear train 5 of the left front wheel, and a DC motor 24 at the rear end of the left side drives a planetary gear train 21 of the right front wheel. The planetary gear system 7 of the left rear wheel is driven, and the revolution and rotation of the planetary gear system are used to complete the deformation transformation of the left front wheel 4, the left rear wheel 6, the right rear wheel 9, and the right front wheel 19, thereby completing the movements of the wheelchair going upstairs, going downstairs, and driving on flat ground. The switching between movements is continuous. In order to improve the comfort and safety of the passengers, the electric telescopic rod 8 of the comfort system is adjusted linearly in real time during the process of going upstairs and going downstairs, providing the passengers with a comfortable riding experience.

Chinese patent No. CN115089392B discloses a hydraulic lifting self-balancing intelligent wheelchair for assisting the elderly in climbing stairs, comprising a wheelchair frame, a hydraulic lifting mechanism and a triangular wheel mechanism; the hydraulic lifting mechanism is slidably connected to the middle and lower area of the rear side of the wheelchair frame; the triangular wheel mechanism is respectively arranged at the bottom of the front end of the wheelchair frame and on the left and right sides of the bottom of the hydraulic lifting mechanism. The invention uses a hydraulic lifting platform to adjust the seat level, and can instantly adjust the height of the rear wheels during the process of going up and down stairs, ensuring the safety and comfort of the stair climbing process. A ratchet self-locking device is designed to ensure the self-locking function of each step in the stair climbing process, preventing accidents caused by hydraulic failure, and further improving safety. The overall structural design is simple and compact, with light weight and greatly improved range. Each system is driven independently, and the control is flexible and convenient, so that the wheelchair can move in all terrains and differentially in a variety of environments. The steering system is simplified, and the turning radius is reduced, which is convenient for people with mobility difficulties.

Chinese patent CN113350063A discloses an electric wheelchair capable of climbing stairs, which includes an electric wheelchair, a control panel, a power box, a front climbing device and a rear climbing device. The electric wheelchair has control panels on the left and right armrest flat support plates, and the electric wheelchair has power boxes installed on the left and right fixed tripods at the lower end. The left fixed tripod has a rear climbing device installed, and the right fixed tripod has a front climbing device installed. The left control panel performs lifting, tilting and positioning adjustment on the rear climbing device, and the right control panel performs lifting, tilting and positioning adjustment on the front climbing device.

Chinese patent CN113967135A discloses a lightweight crawler stair climbing wheelchair, comprising a folding frame and a crawler device detachably mounted at the rear of the folding wheelchair, wherein the crawler device can swing between a position close to the folding frame and a position far from the folding frame; the folding frame comprises a front foot tube, a rear foot tube, a back tube and a seat, a main locking device is provided between the rear foot tube and the back tube, the crawler device comprises a crawler body, and a first mounting rod and a second mounting rod provided at the upper and lower parts of the crawler body, the back tube is provided with a first mounting portion matched with the first mounting rod, the first mounting rod is detachably mounted on the first mounting portion, the rear foot tube is provided with a second mounting portion matched with the second mounting rod, the second mounting rod is detachably mounted on the second mounting portion. By installing the crawler device on the folding frame, the crawler device can be easily disassembled and stored when not in use, making it easy to carry and install.

Chinese patent CN113397850B discloses a wheelchair that can climb stairs, including front wheels, rear wheels, a frame, a seat and a climbing element. The seat is slidably connected to the frame, the front wheels are mounted on the front end of the frame, and the rear wheels are mounted on the rear end of the frame. The climbing element is mounted on the frame, and the climbing element is used for the wheelchair to go up and down stairs. The invention belongs to the field of wheelchair technology. The purpose of the invention is to solve the problem of inconvenience of wheelchair climbing stairs in the existing technology. The technical effect achieved is: through the setting of the climbing element, the user of the wheelchair can freely go up and down stairs without the assistance of others. The wheelchair has a simple structure, is easy to operate, and is easy to manufacture.

Currently available wheelchairs that can safely go up and down stairs use engine electric, hydraulic lifting, universal wheel and fixed wheel swing arms, stop segments, Lello triangular rotors, tracks and other devices to increase safety. They also use infrared sensors, acceleration sensors, pressure sensors, center of gravity sensors and other devices, and have communication devices to contact relatives to protect the safety of users.

However, most of the wheelchairs currently on the market that can safely go up and down stairs have complex mechanisms, which makes them too heavy and often require the help of strong people. There are many restrictions on use. Some are flexible to operate but are expensive, and people with average incomes can hardly afford the purchase cost.

This invention aims at the shortcomings of the above-mentioned commercial products and proposes a low-cost, lightweight, easy-to-operate and safe wheelchair that can safely go up and down stairs.

This wheelchair that can safely go up and down stairs uses a suction cup foot with multiple protruding claws at the bottom, combined with a universal wheel and a fixed component located in the middle of the front and rear axles, and a triangular turntable that can control the rise and fall, allowing the wheelchair to go up and down stairs safely and stably.

1: Chair body

2:Wheels

3: Arc triangle turntable

4: Tracks

5: Brake lever

6: Suction cup feet

7: External factors

8: Universal wheel

Figure 1. Schematic diagram of a wheelchair with tracks and suction cup feet that can safely go up and down stairs.

Figure 2. Schematic diagram of a pure track wheelchair that can safely go up and down stairs.

Figure 3. Schematic diagram of the lifting arc triangle turntable of a wheelchair that can safely go up and down stairs.

A wheelchair that can safely go up and down stairs, as shown in Figures 1 to 3, comprises a chair body (1), wheels (2) and a lifting arc triangular turntable (3), and the wheels (2) and the lifting arc triangular turntable (3) can be connected to the chair body (1) by welding, adhesive, interlocking of the inner and outer diameters, or screw locking.

The lifting arc triangle turntable (3) is composed of a combination of Reuleaux triangles of different sizes, as shown in FIG2, and is covered with a crawler track (4). The corners of the Reuleaux triangle can be embedded in the gaps of the crawler track (4) to enable stable forward or backward movement; when braking, the brake rod (5) can be used to embed the corners of the Reuleaux triangle or the gaps of the crawler track (4).

The bottom of the crawler (4) in contact with the ground has a plurality of suction cup feet (6) with protruding claws. The suction cup feet (6) are fixed to the crawler (4) by adhesive, interlocking of inner and outer diameter differences, or screw locking. The suction cup feet (6) can be made of soft or hard plastic, rubber, silicone or metal to produce the stable and safe suction cup created in this series. The stable and safe suction cup has a plurality of suction cups with protruding claws. The small foot (6) and the track (4) have a thinner outer edge (7), which can generate gravity through the weight of the load above, so that the suction cup small foot (6) and the outer edge (7) can generate good adsorption force, and the suction cup small foot (6) and the outer edge (7) can generate adsorption force through the atmospheric pressure borne by the upper part of the suction cup small foot (6) and the outer edge (7), so that walking on terrazzo or waxed flat ground can have good adsorption ability, can be more stable, and the grip is more solid.

The wheelchair that can safely go up and down stairs uses a suction cup foot (6) with multiple protruding claws at the bottom, in conjunction with a universal wheel (8) and a brake lever (5) located between the front and rear wheel axles, to control a lifting arc triangle turntable (3), enabling the wheelchair to safely and stably go up and down stairs.

1: Chair body

2:Wheels

3: Arc triangle turntable

4: Tracks

5: Brake lever

6: Suction cup feet

Claims (6)

A wheelchair that can safely go up and down stairs, the wheelchair that can safely go up and down stairs includes a chair body, wheels and an arc triangular turntable, the wheels and the arc triangular turntable and the chair body can be connected to each other by welding, adhesive, fitting of inner and outer diameter differences or screw locking, etc.; wherein the arc triangular turntable is composed of a combination of Reuleaux triangles of different sizes. As described in claim 1, a wheelchair that can safely go up and down stairs, the arc triangle turntable can be optionally covered with a track, and the corners of the Reloj triangle can be embedded in the gaps of the track to move forward or backward stably; when braking, the brake rod can be used to embed the corners of the Reloj triangle or the gaps of the track. As described in claim 1, a wheelchair that can safely go up and down stairs, the chair body can be further provided with a brake rod, and when braking, the brake rod can be manually operated to fit into the corner of the Leroy triangle or into the gap of the track. As described in claim 2, a wheelchair that can safely go up and down stairs, the bottom of the track that contacts the ground has a plurality of suction cup feet with protruding claws, and the suction cup feet are fixed to the track by adhesive, interlocking of the inner and outer diameter difference, or screw locking. In a wheelchair that can safely go up and down stairs as described in claim 4, the suction cup foot can be made of soft or hard plastic, rubber, silicone or metal. As described in claim 4, a wheelchair that can safely go up and down stairs, the track has a thinner outer edge, which can generate gravity through the weight of the load above, so that the suction cup foot and the outer edge can generate good adsorption force, and the suction cup foot and the upper part of the outer edge can generate adsorption force through the atmospheric pressure borne by the suction cup foot, so that walking on terrazzo or waxed flat ground can have good adsorption ability, can be more stable, and the grip is more solid.

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