JP3077814U - Electric lift wheelchair - Google Patents

Abstract

(57) [Summary] (Modifications required) [Problem] To provide a general living space with steps other than stairs, with a wheelchair combining an elevating mechanism and a traveling mechanism, and safely using the wheelchair without the help of an assistant. Get a wheelchair that can act. An electric lift wheelchair in which a lift mechanism having independent wheels with front and rear wheels is mounted on an electric wheelchair, and the user can move over a step while alternately or simultaneously raising and lowering the front and rear legs.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to an electric wheelchair.

[0002]

[Prior art]

 With a conventional wheelchair or an electric wheelchair, it was difficult to get over even a small step.

In recent years, electric wheelchairs of a type in which a battery and a motor are later mounted on a wheelchair have begun to spread, but they do not have a function to get over a step. There is a lift for wheelchairs, but it can only be used where the lift is installed, so it cannot be used wherever a wheelchair goes as in the present invention.

[0004] Electric wheelchairs that can go up and down stairs have also appeared, but most of them require the assistance of a helper, and this is a very dangerous concept in terms of function.

[0005]

[Problems to be solved by the invention]

 As described above, in the conventional technology, wheelchairs and electric wheelchairs cannot move over steps, and various concepts have appeared for wheelchairs with stair-climbing functions. Doing so is very dangerous, and it is difficult to completely prevent a fall accident with any function.

[0006] In view of the various problems described above, the present invention provides a wheelchair with an elevating mechanism and a traveling mechanism, so that a person who is in a wheelchair can safely use a wheelchair without the assistance of a caregiver, and has a step other than steps. The aim is to get a wheelchair that can fit into the space.

[0007]

[Means for Solving the Problems]

 Means for solving the above-mentioned problems according to the present invention achieves the object by attaching a lifting drive unit, a traveling drive unit, and traveling wheels to a normal wheelchair and mounting a battery. It is also possible to manufacture an electric wheelchair with a lifting drive and a traveling drive from the beginning.

[0008]

[Action]

 In the electric lift wheelchair configured as described above, as shown in FIG. 2 and FIG. 3, the front leg and the rear leg alternately move up and down over the step.

FIG. 2 shows a state before the vehicle climbs over a step. As shown by the arrow a, the front leg and the rear leg are simultaneously lowered, and the body of the wheelchair is raised. The target height is slightly higher than the step. This is the state.

[0010] Next, the wheelchair is moved forward in the direction of arrow b in the same manner, and this operation is achieved by rotating seven traveling wheels by a four traveling electric motor. The rotation direction of the 7 running wheels is the direction of arrow c.

[0011] In the above-described manner, the wheelchair moves forward and is in the state. In this case, one front leg has reached just before the step, and the nine front wheels of the wheelchair rest on the step. From this state, raise one front leg, and touch the nine front wheels of the wheelchair on the step. This state is the state indicated by.

Then, as described above, the traveling wheel is rotated as shown by the arrow c and advances in the direction of the arrow e. When the vehicle moves forward with a step up to the front of the two rear wheels, the rear wheel of the wheelchair goes over the step, and after confirming this, raises the rear legs as shown by arrow f.

[0013] Then, the two rear legs come into contact with the ten rear wheels again, rotate the seven running wheels in the direction of arrow g, and move forward to complete the step over.

[0014]

【Example】

 An embodiment will be described with reference to the drawings. FIG. 1 shows an overall view of the present apparatus. This figure shows an example in which this device is mounted on a normal six wheelchair, and partially shows details of the internal lift mechanism and guide unit.

In normal running, both the front leg and the rear leg are raised to the rising end, and the vehicle runs on nine front wheels and ten rear wheels of a six wheelchair without contacting the floor. At this time, the seven running wheels are in contact with the ten rear wheels, the driving torque generated by the four running motor rotates the seven running wheels, and the force is transmitted by the transmission of the friction torque between the seven running wheels and the ten rear wheels. It is transmitted to the 10 rear wheels and runs. At this time, the rotation directions of the seven running wheels are opposite to those of the ten rear wheels.

[0016] When the wheelchair main body is running, the seven running wheels are directly in contact with the floor, so that the seven running wheels are driven to run. At this time, the wheelchair operates in the opposite rotation direction to the normal running.

[0017] The running performance is targeted at a speed of 4 km / h, which is the speed at which a person walks normally, and two DC12V, 70W motors are installed as left and right independent driving drives so that a person in a wheelchair can operate freely. A joystick is introduced to the eight control levers to obtain the direction and speed proportional to the tilt angle of the lever.

In the elevating operation, two sets of three elevating motors are installed, and one for the front leg and two for the rear leg can operate independently. In the actual machine of the present invention, the brake mechanism in the vertical movement is achieved by the worm speed reducer. The rotational force of the above three elevating motor is reduced by the worm reducer, and the first leg and the second leg are moved up and down via a chain. The height was set at 30 cm, assuming the range of height that ordinary people can climb and descend naturally.

[0019]

[Effect of the invention]

 The electric lift wheelchair according to the present invention is configured as described above.It is an ordinary wheelchair with an electric running function and a lift function to get over a step, etc., so that people with disabilities who are forced to live in a wheelchair can use it. Even if it is not a barrier-free environment, it is possible to spread free space in the same environment as ordinary people.

As the lift function itself, it is possible to take a high line of sight, and in this case also, it is possible to obtain a field of view at the same height as ordinary people, or to take and act at the same height as ordinary people.

[0021] In addition, if the lift performance is improved, for example, the lift is raised by about 60 cm from the floor surface, it is possible to transfer to a general wagon car without a lift function.

If only the elevating function is installed without the electric running function, a cheaper one can be obtained. For example, if there is a helper at a hospital or facility, the person can get over a step by operating one helper. You can walk and do outdoor activities. Normally, a step cannot be overcome without two or more assistants.

[Brief description of the drawings]

FIG. 1 is an overall assembly view of the manufacturing operation of the present invention.

FIG. 2 is a schematic diagram illustrating an operation of moving while climbing over a step.

FIG. 3 is an explanatory diagram for explaining the order of the operation of climbing over a step.

[Explanation of symbols]

 1. Front legs 2. Hind legs 3. Elevating motor 4. Traveling motor 5. Battery 6. Wheelchair 7. Running wheels 8. Operation lever 9. Front wheel 10. Rear wheel 11. Step 12. Floor

Claims (1)

[Utility model registration claims] 1. A wheelchair fitted with (1) front legs and (2) rear legs with wheels, each leg being independently (3)
An electric wheelchair which can perform a lift operation by an elevating motor, and (2) a rear leg (4) is brought into close contact with a rear wheel by a traveling motor (10) and can perform a traveling operation by rotating a traveling wheel. You can move over the steps by moving the legs up and down alternately and simultaneously at the same time, and the person with a wheelchair can act over the steps alone without the help of an assistant It is a wheelchair.