TH12735Y - Power unit for electric wheelchair assembly. - Google Patents

Abstract

This invention relates to an electrically powered wheelchair. The device is an modular kit that, when attached to a standard foldable wheelchair, enables electric propulsion. It utilizes a pre-assembled brushless motor and lead-acid batteries to power the wheels. Once assembled, users experience increased mobility thanks to the motor's sufficient power to overcome common obstacles such as inclines or steep slopes like bridges. Furthermore, the kit is easily assembled and disassembled by the user, resulting in a compact and portable design.

Claims (6)

Revised 16/8/2016 1. The electric wheelchair power unit is an equipment designed to be connected to a wheelchair, acting as a power source instead of using manual force to push the wheelchair. a. The equipment consists of 2 structures: - The base structure consists of a base socket (4) and a base slide rail (3) installed on both sides of the base socket (4). - The power unit structure is a structure with a drive system that uses an electric motor embedded in the wheel called The hub motor (8) is attached to the fork (9) and handlebar tube (12), on which the handlebar tube (12) is fitted with the electric brake (13) and electric throttle (14). It has the following special features: - There are two devices permanently attached to the wheelchair: the clamp (1) which acts as a connector between the wheelchair and the base structure. - The base structure can be adjusted in width to fit the width of the wheelchair by using a sliding rail (5) by securing the base rail (3) to the base slot by means of a fastening method. - The base structure can be attached to the wheelchair via the clamp (1) by using a clamp (2) which is designed as a spring lock. - The power structure is locked into the holes on the bracket (1) by means of a fastening mechanism, and the base structure can be removed from the wheelchair by releasing the clamp pin (2) which is attached to the holes on the bracket. - To connect the power structure to the base structure, the center bar (7) is inserted into the center hole (44) of the base slot (4), with the bar support plate (24) pushing the center bar into the correct position for quick assembly. Once the desired position is achieved, a spring pin is pushed down to press the base slot pin (6) into the top hole of the center bar (7). - The fork (10) is the assembly that connects the fork (9) to the center bar (7), which is held in place as a pivot point. It can be locked in the desired position by using the fork (19) to grip or engage the fork (10) in a levering motion. When the mechanism is engaged, the center bar (7) cannot rotate upwards toward the handlebar tube (12), but can rotate in the opposite direction, and the front wheel of the wheelchair can be locked in place. The wheelchair is lifted off the ground - the beak (19) rotates down to automatically engage or make contact with the neck of the beak (10) due to the force of the spring (20) pulling the beak (19) down to engage or make contact with the neck of the beak (10). The beak (19) is activated when the handlebar tube (12) is pushed forward, causing the wheelchair to tilt at an angle backward, resulting in the wheelchair fitted with the electric wheelchair power unit being ready for use. - The beak (19) that rotates down to engage or make contact with the neck of the beak (10) can be disconnected by pushing the handlebar tube (12) forward, causing the wheelchair to tilt at an angle backward, and pressing the lever (23) causing the beak (19) that rotates down to engage or make contact with the neck of the beak (10) to detach. - The stand (18) is a component that helps support the power unit structure to prevent it from falling. It can be removed and installed via a flat plate with an inner semicircular cutout and an outer cutout. This cut will be a gap for inserting the stand assembly (18) into the parrot beak (19) where the pin is already waiting - The stand assembly (18) can be adjusted in angle by passing a flat plate with an inner semicircular cutout that has an outer cutout into the parrot beak (19) where the pin is already waiting - The handlebar tube (12) is the directional control device, the electric throttle (14) is the speed control device, and the electric brake (14) is the brake control device, in a manner similar to a tricycle. ----------------------------------------------------------- 1. Electric wheelchair power unit is a device designed to be attached to a wheelchair, acting as the power source instead of using manual force to push the wheelchair. a. The device consists of 2 structures: (1) The base structure consists of a base socket (4) and a base slide rail (3) installed on both sides of the base socket (4). It has a special feature: - There are only 2 pieces of equipment permanently installed on the wheelchair: the clamp (1) which acts as a connecting device between Wheelchair with Base Structure - The base structure can be adjusted in width to fit the width of the wheelchair by using a sliding rail (5) by securing the base rail (3) to the base slot (4) by means of a fastening method. - The base structure can be attached to the wheelchair via a clamp (1) by using a spring-loaded clamp locking mechanism to the holes on the clamp (1) by means of a fastening method (2). The power structure is a structure with a drive system that uses an electric motor embedded in the wheel, called a hub motor (8), attached to the fork (9) and the handlebar tube (12), which has an electric brake lever (13) and an electric throttle (14) installed. It has a special feature: - The beak neck (10) is the point where the fork (9) is connected to the center beam (7), which is held together in a pivot position and can be locked in the desired position by using the beak (19) to grip or contact the beak neck (10) in a levering manner when the mechanism is working. This will prevent the center beam (7) from rotating upwards towards the handlebar tube (12). -The kickstand assembly (18) is a part that helps to support or hold the power structure so that it does not fall over when stationary. It is designed to be removable from the workpiece and can be adjusted to the desired angle during use. This is achieved by designing a flat plate with an inner semicircular cutout with an outer slit. This slit is a slot for inserting the kickstand assembly (18) into the parrot beak (19) where the pins are already waiting. B. Connecting the power structure to the base assembly structure to be in a ready-to-use condition by connecting through the center beam (7) of the power structure to the base assembly slot (4) of the base assembly structure and raising the front wheel of the wheelchair when the assembly is complete. It has a special feature: -The connection of the power structure to the base assembly structure involves inserting the center beam (7) into the center hole (44) of the base assembly slot (4), with the beam support plate (24) helping to push the center beam into the appropriate position, and for quick assembly. And once the desired position is reached, the spring pin is pushed down to press the locking pin of the base assembly (6) into the hole on the top of the central beam (7). -The change from dragging, which is caused by the two front wheels of the wheelchair not being lifted off the ground, resulting in 5 ground contact points, to a drive system similar to a motorized tricycle, which has 3 ground contact points, by lifting the front wheels of the wheelchair off the ground, which is a result of the special design at the beak neck (10) and the beak (19). When the mechanism is working, it causes a levering action, preventing the central beam (7) from rotating up towards the handlebar tube (12), resulting in the two front wheels of the wheelchair remaining lifted off the ground. -The beak (19) will automatically rotate down to engage or contact the neck of the beak (10) by the spring (20) pulling the beak (19) down to engage or contact the neck of the beak (10). The beak (19) will work when the wheelchair user or the helper has connected the power structure to the base assembly. and push the bicycle handlebar tube (12) forward, causing the wheelchair to tilt at an angle backward and the front wheels of the wheelchair to lift off the ground. C. The connection of the power structure to the base structure, which has been designed so that the user can do it themselves or the assistant can assemble it for them, has special characteristics in the assembly part, which is: 1. The wheelchair must have the base frame already installed. 2. The user or assistant brings the wheelchair to the rear of the power structure, with the device centered on the wheelchair. The device will then extend the stand (18) to support it, putting the device in a ready-to-use condition. 3. The user or assistant, with their dominant hand, grasps the middle bar (7) of the power unit attached to the electric wheelchair assembly and inserts it into the base slot (4), pushing the middle bar (7) against the support plate (24), while releasing the spring of the base locking pin (6) to lock into the hole on the top of the middle bar (7), allowing the device to be secured and connected to the wheelchair. 4. Once the device is connected to the wheelchair, the front wheels of the wheelchair touch the ground, and the handlebar tube (12) is lowered. The user or assistant then pushes the handlebar tube (12) forward. Pushing it forward causes the wheelchair to tilt to a usable angle (5 to 20 degrees). When tilting the wheelchair, the front wheels of the wheelchair are lifted off the ground, the angle depending on how high the clamp (1) is installed from the ground. Once the desired angle is reached, the pivot point at the beaker (10) activates, the spring pulls the beaker (19) down and hits the beaker (10), creating an engagement. This engagement causes the wheelchair and the electric wheelchair power unit to remain at this angle, and the key feature is that the front wheels of the wheelchair are lifted off the ground. 5. Adjust the angle of the tripod (18) forward. 6. The user or assistant of the wheelchair can operate and control the device. The direction can be controlled via the handlebar tube (12), the speed via the electric throttle (14), and the braking speed via the electric brake (14). The control is similar to that of a motorized tricycle. D. Removing the base assembly from the wheelchair. When folding the wheelchair, there is a special feature in removing the base assembly from the wheelchair: - The base assembly attached to the wheelchair can be removed by pulling the spring-loaded latch (2) out of the clamp (1), then releasing the sliding rail latch (5) to close the base assembly sliding rail (3) together, causing the base assembly to detach from clamp (1), thus allowing the wheelchair to be folded (foldable models).