WO2018203309A1 - Anti-vertigo electric wheelchair with power transmission system for steep slopes - Google Patents

Abstract

The present invention relates to the field of electromechanical engineering, applied to an anti-vertigo electric wheelchair with power transmission system for high mountain areas, assembled in several modules as follows: i) an upper chair module assembled on a rail, which is provided with a transmission system for horizontal movement; ii) a tilting oscillation module, as a suspension system for the chair; iii) a three-wheeled frame module; iv) a power transmission module made up of two motors and independent gearboxes for each front wheel; v) a control lever module that controls the functions of the chair, such as motor speed, gear shifting, turning and activating the braking system; and vi) a telescopic pusher module coupled with controls for speeding up and slowing down, installed in the handles of the pusher.

Description

 WHEELCHAIR ELECTRIC ANTIVERTIGO WITH SYSTEM

 POWER TRANSMISSION FOR HIGH PENDING

TECHNICAL FIELD

The present invention relates to an electric wheelchair against vertigo that generates more freedom of movement on the axes "x", "and" through a pendular triangular support system; The present invention particularly relates to an installation of the power transmission system, with engine and gearbox, to a chassis with two front wheels that offers high power, required to travel steep slopes.

Various types of automatic wheelchairs with different operating solutions on the market are known, the present invention uses chairs of the same type, but providing new electro-mechanical technologies, to achieve greater mechanical and ergonomic efficiency.

BACKGROUND OF THE INVENTION

 From a background search of electric wheelchairs, some background was found, the most relevant results are the following:

 From the background we can mention the POWERTEC model of Sunrise Medical; This wheelchair concept uses two independent motors, one for each wheel. The directionality of the chair is achieved thanks to the electronic control system, which turns both drive wheels differently. Currently, many manufacturers make chairs with these characteristics. Examples of this type of solutions are found in the patents: WO 2005051279 A1, US7431 1 10 (B2) - 2008-10-07, WO 2003034968 A1, US 6443252 B1 Sep. 3, 2002,

WHEELCHAIR WITH ACCELERATOR HANDLE by gyro, Segway Genny Mobility. Electric wheelchair with monitor by Scalevo - ETH Zurich. Rests manual sliding feet 4,266,305 May 12, 1981. RECLINER OF 180 DEGREES: US Patent No. 6,375,209 B1, APR 23 2002 Pride Mobility Quantum 600 Electric Wheelchair with Tilt, Recline & Legs: Pride Mobility Products Corp. Power Stand up and reclining wheelchair Patent US5366036A Nov 22 94. These wheelchairs present

i problems, which focus on the following observations: A more efficient power transmission system is required to climb slopes.

 - More speed is required.

 - Wheelchairs seats are required with more height.

 - A good ergonomic system is required when handling handlebars

 Accelerator of the chair.

DESCRIPTION OF THE INVENTION

As a way to illustrate the present invention in its most relevant characteristics and as an explanatory and non-limiting example, the most representative figures of the embodiment of the invention are annexed.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1: Is a rear isometric view of the fully assembled wheelchair.

 Figure 2: It is a top of the wheelchair completely assembled.

Figure 3: It is a rear view of the fully assembled wheelchair. Figure 4: It is a left side view of the fully assembled wheelchair.

 Figure 5: Is a front isometric view of the wheelchair in an assembly position for the chair and wheelchair modules.

 Figure 6: It is a top view of the wheelchair in assembly position for the chair and wheel chassis modules.

Figure 7: It is a front view of the wheelchair in assembly position for the chair and chassis wheel modules.

 Figure 8: It is a left side view of the wheelchair in an assembly position for the chair and wheel chassis modules.

Figure 9: Is a rear isometric view of the wheel frame.

Figure 10: It is an exploded view of the wheel chassis.

Figure 11: It is a front isometric view of the chair module with the transmission mechanism for the horizontal movement of the chair and the possibility of coupling a parasol with photosensitive translucent sheet. Figure 12: Isometric view of the mechanical transmission module to the driving wheels, highlighting the conical pinions, axle and disc of the braking mechanism. Figure 13: It is an illustration composed of three figures (13a, 13b and 13c) in which the 13th is a diagram of the physical parameters involved in the oscillating pendular mechanism; 13b is an isometric view of the chair module assembled to the pendulum module; and 13c is a side view showing in detail the pendulum module.

 Figure 14: It is an illustration composed of two figures (14a and 14b) in which the 14a is an isometric view of the chair module assembled to the pendular module; and 14b is a side view showing in detail the pendulum module with respect to the center of gravity.

 Figure 15: It is a schematic illustration of the pendular mechanism to show the physical parameters that intervene in the oscillation of the pendular module. DETAILED DECRIPTION OF THE FIGURES

 Figure 1: Is a rear isometric view of the electric wheelchair anti vertigo with power transmission system for high mountain, which is comprised of: a seat (1), a backrest (3), an armrest (2) , a telescopic pusher module (4), chair base rail (5), a motor housing (6), two drive wheels (7), two fenders (8), a rear footrest (9) and a screen electronic (10). The front wheels (7) absorb most of the load (weight of the person plus the passenger) and through a third idler wheel (13) the stability of the chair (1) is obtained; will have a fastening system where the chair (1) as such will be anchored in a single point to the structure of the wheels, where she will have freedom of movement on the X axis, and releasing its point of gravity to keep it stable to the natural axis gravitational

 Figure 2: It is a top view of the electric wheelchair anti vertigo with power transmission system for high mountain, which is comprised of: a seat (1), a backrest (3), an armrest (2), a telescopic pusher module (4), chair base rail (5), a motor housing (6), two drive wheels (7), two fenders (8), a rear footrest (9), an electronic display ( 10), a joystick (11) and a front footrest (12).

Figure 3: It is a rear view of the electric wheelchair against vertigo with power transmission system for high mountain, which is comprised of: backrest (3), a telescopic pusher module (4), a motor housing (6), two drive wheels (7), two fenders (8), a joystick (11) and a rear center idler ( 13).

 Figure 4: It is a left side view of the electric wheelchair anti vertigo with power transmission system for high mountain, which is comprised of: a telescopic pusher module (4), a motor housing (6), two drive wheels (7), two fenders (8), a rear footrest (9), a front footrest (12) and a rear central idler (13).

 Figure 5: Is an anterior isometric view of the electric wheelchair against vertigo with power transmission system for high mountain, in assembly between the chair and the wheel chassis, which is comprised of: a seat (1), a backrest (3), an armrest (2), a telescopic pusher module (4), chair base rail (5), a motor housing (6), two drive wheels (7), two fenders (8) , a rear footrest (9), an electronic screen (10), a joystick (11) and a front footrest (12). When the control unit is activated (11), the electric wheelchair generates a safe state by activating the brakes of its main wheels (7) and blocking the pendulum movement module by using ratchets, which are installed laterally on the points. of support of the pendular module, activated by an electrical system; at that moment the electric wheelchair will be totally blocked maintaining its position no matter where pressure is applied, this in order that the people arriving at the wheelchair do not have any kind of movement that generates a slip, that can affect an accidental hit; either by a movement when turning one of its wheels or by a movement of the pendular movement module.

Figure 6: It is a top view of the electric wheelchair anti vertigo with power transmission system for high mountain, in assembly between the chair and the wheel chassis, which is comprised of: a seat (1), a support arms (2), a telescopic pusher module (4), a motor housing (6), two fenders (8), a rear footrest (9) and a front footrest (12).

Figure 7: It is a front view of the electric wheelchair anti vertigo with power transmission system for high mountain, in assembly between the chair and the wheel chassis, which is comprised of: a seat (1), a backrest (3), a telescopic pusher module (4), a motor housing (6), two drive wheels (7), two fenders (8) and a rear center idler (13). Figure 8: It is a right side view of the electric wheelchair anti vertigo with power transmission system for high mountain, in assembly between the chair and the wheel chassis, which is comprised of: a backrest (3), a telescopic pusher module (4), a chair base rail (5), a motor housing (6), two drive wheels (7), two fenders (8), an electronic display (10), a joystick (11), an anterior footrest (12) and a rear central idler (13). Figure 9: Is a rear isometric view of the wheel frame, comprised of: a telescopic pusher module (4), a motor housing (6), two drive wheels (7), two fenders (8), a rear footrest (9) and an eye (14) to receive the pivot of the pendular module in its upper part. The telescopic pusher (4) will have the possibility of a passenger standing vertically on the footrest (9) acting as driver or passenger accompanying the wheelchair, allowing the handling of the same through its acceleration handles, similar to that of a motorcycle. Figure 10: Is an exploded isometric view of the wheel frame comprised of the following elements: a motor housing (6), two drive wheels (7), two fenders (8), two independent motors (15) for each wheel, with respective flexible axes (16), with conical pinions (17) that engage in other conical pinions (18) which in turn are assembled to the shaft (19) that is inserted in the braking disc (20); Also shown are the motor bases (21) that are inserted in respective bolts of the base (22) of the idler wheel which in turn receives the main base (23) of the motors (15), this entire system being covered by the housing (6); additionally, two parales are observed, one cylindrical (24) that telescopically receives the pusher module and another plane (25) to pivotally articulate the pendulum module. The motors (15) will drive the wheels (7) of the wheelchair, governed by two independent gearboxes with sensors that manage to control the speed, the direction of rotation, giving freedom of movement in an order of 0 to 70 km / h. Said gearboxes can generate up to six speeds depending on the power and torque of the motors (15), these changes are automatic and will be actuated in electronic form by means of a circuit that is connected to the joystick (1 1), this system calculates the speed moving the mobile axis looking for the pinions that correspond to the speed, within a range that is established according to the minimum and maximum speeds of the engines. Said motors (15) are powered by two nickel-cadmium type batteries and connected by flexible shafts (16) with an endless screw system, self-blocking with six-pack changes for each of the wheels, which are coupled to a flexible transmission system per guaya. The speed of the wheelchair will be given by an electronic system that adjusts the two wheels (7) at the same angular speed, by means of an electronic control lever (1 1) that will adjust it allowing the greater or lesser turn angular of one wheel in relation to the other, to allow turns of up to 360 ^Q degrees on its own axis.

 Figure 11: Isometric view of the chair module, where a lateral mechanism composed of a transmission system (26) with a feed motor (27) activating an endless screw (28) mounted between two extreme bearings ( 30), which horizontally displaces a nut (29) fixed to the structure of the module of the chair. The chair has an electronic system before starting any type of movement with a different person, balances the weight in reference to the point of weight transfer to the fixed structure of the wheels; the chair will move on a rack with a worm screw system controlled by a horizontality sensor for an automatic horizontal gravitational sliding movement, bringing it forward or backward, driven by a horizontal displacement motor by means of the control (1 1) . The backrest (3) of the chair is reclining at 180 degrees of inclination by means of a manual lever. The figure also shows the optional foot supports (12a and 12b) that can be replaced by the footrest (12) of figure 6 and optionally has the parasol with photosensitive translucent sheet (36).

Figure 12: It is an isometric view of the mechanical transmission module to the driving wheels highlighting the conical pinions (17) and (18), flexible shaft (16) from one of the engines; the disc (31) of the braking mechanism (20) is also shown. The braking mechanism is independent in each of the wheels and is electrically operated together with the speed control of the control command (11), the user progressively accelerates and / or decelerates; this mechanism has an emergency brake button that when activated will actuate the brake instantaneously. The brakes are permanent, the electric actuator removes the pressure that the bands exert on the disc (31) of each wheel, the result of two springs coupled to the mechanism, ensuring that, in the event of a power failure due to disconnection or other incident, be braked; It also adds a mechanical actuator with guaya, where the person can cancel the electronic brake system by applying pressure for manual handling of the wheelchair. Figure 13: It is an illustration composed of three figures (13a, 13b and 13c) in which the 13th is a diagram of the physical parameters involved in the oscillating pendular mechanism; 13b is an isometric view of the chair module assembled to the pendulum module; and 13c is a side view showing in detail the pendulum module. In this figure is explained, the anti-vertigo system to keep the axis of horizontality independent of the plane of inclination, that is to say that the person who is in the chair remains in its axis of gravity, regardless of the movement that the chair performs on an inclined plane. This is achieved with a pendular system formed by the elements (32) and (33) that go from the base of the chair converging cassia to the height of the armrest (2), which offers freedom of movement on the XY axis. In the system shown in this figure it is explained that the chair is supported by a pendulum system, where the support points of the chair will be below the weight transfer point to the wheels, which corresponds to the same height of the axle. the wheel.

Figure 14: It is an illustration composed of two figures (14a and 14b) in which the 14a is an isometric view of the chair module assembled to the pendular module with its elements (32) and (33) converging towards the pin (34) to be inserted in the eyelet (14) shown in Fig. 9; Figure 14b is a side view showing in detail the pendulum module with respect to the center of gravity, which moves on the horizontal axis depending on the distribution of the weight exerted on the chair.

 Figure 15: It is a schematic illustration of the pendular mechanism to show the physical parameters involved in the oscillation of the pendular module where the elements (32) and (33) are telescopic elements with springs (35) that form a damping system, moment of weight on the chair.

Described as the present invention has been in its most relevant characteristics, the property and originality of the following are declared:

Claims

Claims  1 - An electric wheelchair against vertigo is advocated with power transmission system for high mountain, characterized in that said chair is comprised of the following modules, as follows: i) A module of upper chair assembled on a rail, which it is provided with a transmission system for horizontal displacement; ii) a pendulum oscillation module, as a suspension system for the chair; iii) a chassis module with three wheels; iv) A power transmission module comprised of two independent engines and gearboxes for each front wheel; v) A telescopic pusher module coupled to acceleration and deceleration controls, installed on the pusher handles. 2- An anti-vertigo electric wheelchair with power transmission system for high mountain, according to claim 1, characterized in that, the chair is comprised of, a seat (1), a backrest (3), a backrest arms (2), a telescopic pusher module (4), chair base rail (5), a motor housing (6), two drive wheels (7), two fenders (8), a rear footrest (9) ), an electronic screen (10), a joystick (11) and a front footrest (12). Said chair, has as lateral bases a rotor (5) on which it moves horizontally by means of a motor, transmission, nut and worm, controlled by the control lever (11) to position the center of gravity; and parasol with photosensitive translucent sheet (36) to protect the user. 3- An anti-vertigo electric wheelchair with high mountain power transmission system, according to claim 1, characterized in that the pendulum oscillation module is comprised of a triangular structure with two cushioned telescopic extensible elements (32). ) and (33), whose support points will be below the weight transfer point to the wheels and which corresponds to the same height of the axle of the wheels (7), which is assembled in the chair module by means of two fixed points in its base and a pivot point (14) in the upper part of the chassis module. 4- An anti-vertigo electric wheelchair with high mountain power transmission system, according to claim 1, characterized in that, the wheel chassis module, is comprised of a telescopic pusher module (4), a motor housing (6), two drive wheels (7), two fenders (8), a rear footrest (9) and an eye (14) to receive the pendulum module pivot on its upper part. 5- An anti-vertigo electric wheelchair with power transmission system for high mountain, according to claim 1, characterized in that, the power transmission module is comprised of two independent motors and gearbox (15) for each front wheel (7), a motor housing (6), two fenders (8), flexible shafts (16), with conical pinions (17) that engage in other conical pinions (18) which in turn are assembled to the shaft (19) that is inserted into the braking disc (20), motor bases (21) that are inserted in respective bolts of the base (22) of the idler wheel (13) which in turn receives the main base (23) ) of the motors (15), this whole system being covered by the casing (6); additionally, the module comprises two shutters, one cylindrical (24) that telescopically receives the pusher module (4) and another plane (25) to pivotally articulate the pendular module. The motors (15) will drive the wheels (7) of the wheelchair, governed by two independent gearboxes with sensors that control the speed, the direction of rotation, giving freedom of movement in an order of 0 to 70 Km / h. Said gearboxes generate up to six speeds depending on the power and torque of the motors (15), these changes are automatic and will be actuated in electronic form by means of a circuit that is connected to the joystick (1 1). Said motors (15) are powered by two nickel-cadmium-type batteries and connected by flexible shafts (16) with an endless, self-locking screw system with a six-change box for each of the wheels, which are coupled to a system flexible transmission per guaya. The speed of the wheelchair is given by an electronic system that adjusts the two wheels (7) at the same angular speed, by means of an electronic control lever (1 1) that adjusts the same allowing the greater or lesser angular turn of one wheel in relation to the other, to allow turns of up to 360 ^Q degrees on its own axis. 6- An anti-vertigo electric wheelchair with power transmission system for high mountain, according to claim 1, characterized in that, the telescopic pusher module (4), is a tubular component of two sections, which is inserted in the cylindrical paral (24) of the chassis module, provided at its end with handles that act as accelerator or decelerators of the independent motors of the electric wheelchair through internal guides, this module is activated by a passenger companion for get control of the handling of the chair through said acceleration handles.