WO2019194672A1

WO2019194672A1 - Mobile base of a crane for moving a person

Info

Publication number: WO2019194672A1
Application number: PCT/MX2018/050024
Authority: WO
Inventors: Gonzalo Garcia Castilla; Armando HERRERA AGUILERA
Original assignee: Accesos Sin Limite S.A. De C.V.
Priority date: 2018-04-06
Filing date: 2018-11-15
Publication date: 2019-10-10
Also published as: MX2018004255A

Abstract

The invention relates to a crane system for moving persons, wherein the system adapts to different types of terrains, different types of vehicles, and different sizes of users. The system includes a base with at least one pair of front wheels and at least one pair of rear wheels, a raising system with at least one safety level and a coupling module with three points of contact with the user, thus reducing the physical interaction between the crane operator and the user.

Description

A MOBILE CRANE BASE FOR THE TRANSFER OF A PERSON

FIELD OF THE INVENTION

The present invention relates to the field of mechanics, particularly to the area of cranes designed for the transfer of people with reduced mobility, where normally the transfer of said person is carried out from his wheelchair to a car and / or vice versa, and where factors that have been identified as irregularity of the land, type of car, size of the user etc., are considered.

BACKGROUND

Making a city accessible to all is a challenge for the governments and institutions of society, and particularly for people or relatives of people with motor disabilities. The most sensitive sectors in an environment where mobility is required are people with disabilities and the elderly, who not only face their economic and social reality, but also the physical barriers existing in urban and architectural, public and private spaces, which it makes its insertion in society more difficult.

In this sense, so that a person with motor disabilities has accessibility in their daily lives, different devices, systems, devices, modules etc., have been designed for each particular activity, such as a wheelchair, supports in the bathrooms , street ramps and access to buildings, etc. However, it has been identified that all these supports are not enough in an environment like a city. In this sense, one of the activities that people with reduced mobility suffer most is when they want to move, for example, from a point A to a point B where it is necessary to use different means of transport. In other words, it has been identified that the connections that exist between said point A and point B are not possible to have the necessary support for people with a motor disability. As a result, this causes these people to choose to use a single means of transport such as a private car or a taxi. Thus, another problem arises for these people, where they must now be moved from their wheelchair, to the interior of the vehicle.

In the case of private cars, it is customary to adapt the vehicle to include mechanisms that facilitate the access and exit of people from that car. However, the costs of adapting a car to have these facilities are high for certain sectors, and they are irreversible adaptations for the car. In the case of public transport means such as taxis, it has been identified that they normally do not have the minimum facilities to carry out the wheelchair transfer to the interior of the vehicle, which means that the driver is the one who loads to the person and enter the vehicle, which raises the cost of transportation notoriously. In such a way that a solution for this problem is the use of transport cranes for people. In this sense, cranes usually have a base that is normally mobile and is designed to be below a vehicle during use, a lifting means that serves to lift and support the load, and a hitching means where The person is directly attached. Said cranes are designed to keep the center of total mass with or without a load within a stability zone so that said center of mass leaves said area, it is likely that the crane will be turned over. Using as reference the degrees of freedom that an airplane possesses, a crane normally tries to restrict the longitudinal turning or warping, and the lateral turning or nodding, leaving free the vertical or yawed turn. Likewise, it allows to advance longitudinally or laterally, since the vertical movement is discarded by the force of gravity.

As for the direct relationship of the user with the crane, the common technique used to anchor the person to the crane is through a harness, which is sized depending on the user, that is, there are different sizes of harness depending on the user's complexion, such as small, medium, large, extra large size, etc. However, it has been identified that said harness technique is functional, but usually involves too much contact of the crane operator with the user, which is uncomfortable for certain users, since said operator must lift the legs and tilt the chest of the user (among other things) and also secure the harness to the crane.

In addition to this, it has been identified that cranes found in the art are normally cumbersome and limited in terms of their ability to adapt to different scenarios that depend on factors such as: vehicle conditions and size; terrain characteristics, where you can find sloping or partially sloping terrain, semi-built sidewalks, in addition to other irregularities; and characteristics of the same person that will be supported by the crane, such as its weight, height and / or build.

In this sense, the need to design a crane for people with limited mobility has been identified, where the crane is able to move on different types of surfaces avoiding the use of complex suspension systems (mainly designed for high speeds) that make the final product, with maneuverability, that is adjustable to the different complexions of users, from a child, to a large adult, and also that is able to adapt to the different car designs that exist. In such a way that it is also desirable to design a crane that can also be manufactured in a modular way, with lightweight materials that allow to move said crane with ease and that can be easily stored either inside or in the trunk of a car, or within a property. SUMMARY

The present invention relates to a crane system for supporting and moving people with limited mobility or motor disability.

The crane system is mainly composed of modular elements that join together in a separable way:

A movable base or pedestal, which is in contact with the surface and provides the necessary mechanical means so that the crane with or without a load can be pushed or pulled on said surface without said load falling or tilting a tilt angle of tolerance ; a tower that includes a lifting mechanism that can be controlled either manually or electrically; and a clamp or hitch module, which is where the person is held and supported directly. The tower, detachably coupled to the mobile pedestal, includes mechanical means to lift, suspend and descend different types of loads, particularly corresponding to the average weight of a person. In one embodiment of the invention, the crane system includes a hitch module coupled to the tower module, where the user will be directly anchored to be raised, suspended and / or lowered by the tower module.

In one embodiment of the invention, the mobile base or pedestal includes a base center where at least two rigid horizontal arms are coupled in their front part separated by an initial separation distance projecting outside said base center overcoming a vertical line defined by the location of the center of mass of the crane including the estimated weight of the user, and where each arm, at its distal end includes at least one wheel that is in contact with the floor. The arms serving as the main stability support whose shape, length and location, allows the center of mass of the crane with or without a load to be in a stable area that maintains the vertical. In a particular embodiment, the at least one wheel is of the idler wheel type that includes an additional axis of rotation providing an additional degree of freedom or ability to travel along curved paths or curved paths. In one embodiment of the invention, each arm is defined by a rigid straight bar. In an embodiment of the invention, each arm also includes an extension mechanism, such as a telescopic mechanism, which allows the length of said arm to be adjusted, either extending or contracting it, thus allowing the center of mass of the system to be adjusted with respect to to the modification of the length of the arms. In one embodiment, the angle of separation between arms is fixed. In another embodiment of the invention, the angle of separation between arms is adjustable, where mechanical means known in the art are used to allow the arms to include an additional degree of freedom to allow said opening or closing adjustment, thus adjusting the angle of separation between arms. In an embodiment of the invention, an opening / closing mechanism of angle of separation of arms that causes the arms to move away or approach each other symmetrically and simultaneously, that is, by modifying the angle of separation between arms symmetrically. In one embodiment, each arm is adjusted independently.

In one embodiment of the invention, the mechanism is mechanically configured so that the minimum separation angle is such that the separation distance between distal ends of arms is equal to or greater than the initial separation distance.

In one embodiment of the invention, each arm is composed of a plurality of articulated sections through vertical pivots, which allow each arm to be adjusted independently to adapt to the particular conditions of terrain, automobile and / or user.

The mobile base or pedestal also includes in the opposite part of the center of the base or after the location of the at least two arms, a mechanical arrangement of wheels that provide stability to the crane and allow its transfer. In one embodiment of the invention, the mechanical arrangement of wheels is an arrangement of the type with differentiated axles, wherein said configuration of differentiated axles allows the absorption of certain imperfections in the terrain and also adapts more naturally to the natural dynamics of a mechanism in motion, mainly in curves or turns. The differentiated axes defined by a crank-type axis formed by a rigid bar with three parallel sections separated a predetermined distance, where the rear wheels are coupled to the parallel sections of the ends, leaving the middle section as the main axis, where it is coupled by means of a bearing to the base or mobile pedestal.

Thus, the pair of rear wheels with differentiated axle where said wheels rotate with respect to the main axle and with respect to its own axle defined by each axle end segment, each one facilitates the movement of the system of the present invention and in addition certain terrain irregularities such as holes, stops, etc., without changing the stable position of the center of mass. In the art it has been identified that the differentiated axes provide a natural dynamic movement when turning at a certain speed since they allow an inclination to compensate, with the same weight of the body, the corresponding centrifugal force. For example, when the crane system advances at a certain speed and turns to the right, the crane can be allowed to lean to the same right to compensate for the centrifugal force experienced by the center of mass and thus maintain a stable position without losing the vertical In this sense, a crane system will hardly reach speeds that require this benefit, in such a way that it has also been identified that if the inclination that allows the arrangement of wheels that rotates around different axes is blocked, the result is that before any imperfection in the ground, such as hole or protrusion (within a range of depth and height respectively), the wheel array absorbs (at least 50% when the axles are 180 ° apart) either depth of the hole, or the height of the protrusion and also maintaining substantially the horizontal, that is, the wheels with different axles are forced to modify their operating height, but all the axle segments remain substantially parallel to the horizontal and the axis intermediate or main, you only experience part of the imperfection in the field.

In this sense, the differentiated axes are obtained by means of a crank-type axis defining three parallel segments with wheels at each end of the non-intermediate segments. Thus, while the wheel on the right side adjusts its height due to an imperfection in the terrain, the wheel on the left side compensates, at least partially, for said adjustment by maintaining the substantially horizontal middle segment and where said middle segment only experiences an elevation equal to half height that raised / lowered the wheel. Thus, a mobile pedestal with the back including an arrangement of wheels with differentiated axles, and in the front part with arms with wheels that support the center of mass and also block the natural rotation of said wheel arrangement, a mobile pedestal is obtained that before irregularities of land in the back, the horizontal is maintained, at least partially, by the suspension effect that it provides, since it is forced that the differentiated axes do not tilt, but adjust to the height when turning with respect to the main axis or intermediate segment, but also rotate with respect to the same axis of the wheel. Thus, the left side wheel can be located in front of the main axle or behind the main axis, the reverse happening with the right side wheel. In one embodiment of the invention, the tower includes an interlocking lifting mechanism known in the art by different means, such as, but not limited to: hydraulic piston, pneumatic piston, pulley system, winch, winch, electric motor, hoist, etc. In a particular embodiment, a winch system is used with a tape wound on a roller that includes enclave means and a crank that implements said enclave means through a key or lock to lift, maintain and / or lower the load.

In one embodiment of the invention, the coupling module includes a scissor mechanism, defined by two cross bars that rotate around an axis, where each bar includes a first bend made with a first bend angle thus defining a first bar segment. so that with said first fold the first bar segment is parallel, at least partially, with the horizontal so that the user can rest there his armpits where he will be, at least partially, lifted by the crane system. Also, in one embodiment of the invention, a second segment of each bar defined by a second fold made at a second bend angle whose angle allows each said second segment to be, at least partially, parallel to the vertical and / or perpendicular to the First segment of bar. Thus, being at least partially perpendicular to the horizontal and / or the first segment of scissor bar, allows a fabric to be located between every second segment of each bar or flexible material that will serve as a user backup, that is, where the user will rest part of their back when loaded by the crane system. In one embodiment of the invention, the union of the first segment and the second segment is through a hinge type union, so that the resulting backrest will be maintained, by gravity, in a vertical position.

The hitch module is detachably coupled to the tower's lifting mechanism. In one embodiment of the invention, the hitch module is coupled to the tower by means of a straight hitch bar. In one embodiment of the invention, the straight hitch bar includes, at one or both ends of the bar, mechanical means of vertical pivot type connection to allow rotation, at least partially, around said pivot. In one embodiment of the invention, said hitch bar includes mechanical means for adjusting length which allow the length of said bar to be adjusted during use of the crane system. In a particular embodiment, the mechanical means of length adjustment are defined by a telescopic array of bars.

In one embodiment of the invention, marks are placed on the arms indicating the limits to which the center of mass defined by a vertical line projected downwards will cross with said marks. Thus, ensuring that the center of mass is in a position that prevents the crane from turning over.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 shows a perspective view of a crane for the movement of people in accordance with an embodiment of the present invention, where the different types of movement that said crane can have represented by the existing degrees of freedom are defined, including the angular degrees of freedom that revolve around the X, Y, and Z axes, and the linear degrees of freedom that travel along the same axes.

Fig. 2 shows a perspective view of an embodiment of the crane system for moving people of the present invention.

Fig. 3 shows a side view of an embodiment of the crane system for moving people of the present invention

Fig. 4 shows a side view of an embodiment of the crane system for moving people of the present invention, where the operating angle of the hitch module has been adjusted.

Fig. 5 shows a side view of an embodiment of the crane system for moving people of the present invention, where the angle and length configurations corresponding to the hitch module are appreciated. Fig. 6 shows a side view of one embodiment of the hitch module in accordance with the present invention, wherein the length and angle configuration of the scissor mechanism bars allows to include a backrest and a head support.

Fig. 7 shows a bottom view of an embodiment of the crane system for moving people of the present invention, where the pair of rear wheels with differentiated axle and the pair of front wheels coupled at distal ends of arms are appreciated.

Fig. 8 shows a front view of the mobile pedestal module where the opening and closing mechanism of arms is seen more clearly in a single movement.

Fig. 9 shows a top view of a diagram showing the axle configuration of a wheel arrangement with a differentiated axle in accordance with an embodiment of the present invention.

Fig. 10 shows a front view of the diagram showing the configuration of the axle of a wheel arrangement with a differentiated axle, wherein said arrangement is in a non-inclined position.

Fig. 1 1 shows a front view of the diagram showing the axle configuration of a wheel arrangement with a differentiated axle, wherein said arrangement is in an inclined position.

Fig. 12 shows a front view of the diagram showing the axle configuration of a wheel arrangement with a differentiated axle, where the inclination of the wheel arrangement with a differentiated axle is locked.

DETAILED DESCRIPTION OF THE INVENTION

The following description is presented to allow any person skilled in the art to make and use the modalities and is provided in the context of a particular application and its requirements. Various modifications to the disclosed modalities will be readily apparent to those skilled in the art and the general principles defined herein may be applied to other modalities and requests without departing from the spirit and scope of the present disclosure. Thus, the present invention is not limited to the modalities shown, on the contrary it must agree with the broadest scope consistent with the principles and characteristics disclosed herein.

Fig. 1 shows a perspective view of a crane system 1 in accordance with an embodiment of the present invention, where the different types of movement it can have are appreciated. Thus, an X axis or longitudinal axis, a Y axis or lateral or transverse axis, and a Z axis or vertical axis are appreciated, so that the rotation or degree of freedom around the X axis is defined as the longitudinal rotation or warping, the rotation or degree of freedom around the Y axis is defined as lateral rotation or pitching, and the rotation or degree of freedom around the Z axis is defined as vertical or yaw rotation. In this sense, the horizontal is defined as the XY plane, which is understood as parallel with the flat surface of the terrain. Also, a vertical or vertical element is referred to as any element parallel to the Z axis. Fig. 2 shows a perspective view of an embodiment of the crane system of the present invention, where the crane system 1 is appreciated. The crane system 1, divided into modules defined by a first hitch module 30 comprised of a hook bar 32 or straight bar defined by a linear bracket type bracket, which at a first end or distal end of the bar is coupled to a scissor mechanism 31 and where the coupling is made through a mobile vertical pivot 33 , which in addition to detachably joining the hitch module 32 and the scissor mechanism 31, provides a first degree of angular freedom of hitch module 30 by allowing the scissor mechanism 31 to rotate vertically like a hinge with respect to the first end of hitch bar 32. In this sense, the scissor mechanism 31 is where the user will be held facing the crane, such that the center of mass CM is calculated so that it is located ca in the area of the scissor mechanism 31. The hitch bar 32, at its second end or proximal end of the bar, is detachably coupled, by some technique already known in the art, to the second module corresponding to a tower 50 , by means of a fixed pivot 34. Likewise, the tower 50 in turn is detachably coupled, by some technique already known in the art, to a third module corresponding to a mobile base or pedestal 10, which includes a first pair of front wheels coupled through a left arm 1 1 and a right arm 12, and a second pair of rear wheels 13 and 14 coupled to the mobile pedestal 10 through a mechanical wheel arrangement that includes a differential crank-type axle of wheels 15, which is coupled to the base center 20 by means of a bearing parallel to the Y axis.

In one embodiment of the invention, the fixed pivot 34 also includes a second degree of vertical angular freedom of hitch module 30 that allows the hitch bar 32 (and thereby, the hitch module 30) to rotate vertically with respect to the tower 50 as a hinge. In a particular embodiment, mechanical limiters (not shown in Fig. 2) are included, which limit the hinge type rotation of the hitch bar 32 so that the hinge type rotation is made within a range of motion so that the center of mass of crane system 1 is maintained in a stable position. Likewise, the limiters (not shown in Fig. 2) will allow the hook bar 32 to be fixed either in the straight position (by default) or in a desired rotated position.

The tower 50 includes a mechanism 51 of ascent, descent and load support already known in the art. Said mechanism 51 is controlled either manually by a crank 52, where one direction of rotation of the crank 51 raises the load and the other direction of rotation lowers the load, or automatically by an electric motor (not shown in the figures). In one embodiment of the invention, the crank 52 is detachably coupled to the crane system 1, using a standardized connection so that when said crank 52 is removed, an electric motor or motor arrangement with the same Standard mechanical connection is coupled to the crane system 1 to automate the function of the tower 50. A person skilled in the art will notice that the means known in the art for lifting, maintaining and / or lowering a load can vary without affecting the matter of the present invention In a particular embodiment, the mechanism 51 is of the winch type that includes a crank with an enclave system in both directions of rotation. Also, the tower 50 includes a support 55 to facilitate the handling of the crane system 1 by the crane operator.

Fig. 3 shows a side view of an embodiment of the crane system 1 of the present invention, where the configuration of elements is appreciated. In this sense, an angle Q defining the angle of inclination that the tower 50 will maintain with respect to the base in a side view, either fixedly for one mode of invention or adjustable for another mode of invention. In a particular embodiment, said angle Q is maintained in the range of 90 ° to 130 °. Said angle Q depends on one or a combination of factors such as the amount of load, the size of the user i.e. the height of the user, the inclination of the terrain, the type of vehicle, etc. One skilled in the art will notice that said angle Q may vary without affecting the subject matter of the present invention. Also, an angle P is appreciated which will define the angle of inclination of the hitch module 30 either fixedly for one mode of invention or adjustable for another mode of invention. In this sense, said angle P is adjusted in accordance with angle Q and vice versa so that the combination of both angles results in a hitch module whose line is substantially parallel with the horizontal. In a particular mode, an initial or default angle Q is established, which can be fixed. In one embodiment of the invention, the combination of angles P and Q allows the distal end of the hitch module 30 to be below the proximal end of the same module.

Fig. 4 shows the system of Fig. 3 where the angle P has been adjusted in such a way that the straight of the hitch module allows the user to tend to be directed by gravity out of the crane, or towards the distal end of the hitch module 30, which is located below the proximal end.

In one embodiment of the invention, the hitch bar 32 is defined by a telescopic or equivalent mechanical arrangement that allows the original or default length Lb (shown in Fig. 5) of said bar 32 to be modified so that the frontal reach of the crane increase. In this sense, the original or default length is the length calculated to keep the center of mass of the crane system 1 loaded, in a stable position while maintaining the vertical before, during and after the user's transfer. Said telescopic mechanical arrangement or equivalent already known in the art is also useful for users whose height is greater than average, where it has been identified that their knees collide with the tower at the time of being supported, since it will move the user away from the system of crane (the user is supported looking towards the crane system 1). In one embodiment of the invention, the mobile pivot 33 includes mechanical movement limiters which allow the scissor mechanism 31 to be fixed in one position, and in which said limiters also allow fixing in a straight position or in a rotated position with respect to the distal end of the hitch bar 32.

In one embodiment of the invention, the scissor mechanism 31 is defined by two bars, a left bar 36 and a right bar 37, crossed which rotate about an axis and that at one of its ends include a mechanical link that allows the mechanism of scissors tends to be in an open default position, so that when positioning the user, said scissor mechanism 31 will be closed by the same weight of the user until laterally embracing the user's complexion at the height of the thorax.

In Fig. 5 the configuration of the bars 36 and 37 according to an embodiment of the present invention is appreciated, wherein said left and right bars 36 and 37 respectively are configured in such a way that they include a first fold defined by a first bending angle T1 so that a first segment of each scissor bar Lt1 is formed which is, in a mode of invention, substantially parallel to the horizontal, where the user will rest his armpits once positioning the same scissor mechanism 31 of compliance with the user's complexion (the user looking towards the crane system 1). A second fold defined by a second bend angle T2 so that a second segment of each scissor bar Lt2 is substantially vertical (perpendicular to the horizontal and / or perpendicular to the first segment), where it is possible to couple a fabric or substrate between every second segment of each bar that serves as a backup for the user, so that said user can rest his back. In a particular embodiment of the invention, the first bending angle has a tolerance with respect to the horizontal of ± 15- and / or the second bending angle has a tolerance with respect to the vertical of ± 15- and / or with respect to the perpendicular of the first segment of bar Lt1 of ± 15-.

In one embodiment of the invention, mechanical means for attaching a leg harness are coupled to the first segment of each scissor bar Lt1. Thus, in each first segment of the scissor bar the user's armpits and / or a harness will rest, which is coupled by means of bands or strips below the user's legs to add support points or contact between the user and the module hitch 30. Thus, the points of contact of the crane system with the user are armpits, back and legs. In one embodiment of the invention, the user is in contact with the crane system 1 of the present invention: from the armpits by means of the scissor mechanism 31; from the legs by means of rigid hooks hanging from said scissor mechanism 31, wherein the hooks partially surround each leg of the user holding mainly from below to load the Username; and / or from the back through the backrest that is coupled to the scissor mechanism 31 by means of the bar segments Lt2. A person skilled in the art will notice that once the crane system 1 of the present invention is loaded, many of the elements described in this document will have elastic deformations or modifications by certain sets ie differences or gaps, which exist in the joints or joints of the elements, which can alter the revealed angles and lengths, without affecting the subject of the present invention.

In a particular embodiment, the angle T1 is in the range of 90 ° -130 °, thus allowing the user to fall by gravity towards the area of the backrest defined by the second segment of bar Lt2.

In one embodiment of the invention, a hinge type coupling is coupled between the first bar segment Lt1 and the second bar segment Lt2 so that the resulting backrest is coupled by gravity to the vertical regardless of the inclination of the hitch module 30, a the inclination Q of the tower 50 and / or the inclination of the surface where the crane system 1 of the present invention is located.

In this sense, by making the angle P greater than 90 degrees, the user will tend to move towards the backrest by gravity.

Also, in Fig. 5 the angle of separation between wheels in the arrangement of wheels by differential axle 15 is shown, where they are connected to each other a fixed separation of 180 °. In one embodiment of the invention, said angle is different than 180 °.

Fig. 6 shows an embodiment of the invention in which the scissor mechanism 31 additionally includes a third bar segment Lt3 opposite or substantially opposite the second bar segment Lt2 defined by the angle T2, and wherein the inclination angle of said third segment Lt3 is defined by a third angle T3. In one embodiment, the angle T3 is equal to the angle T2. In another embodiment of the invention, angles T2 and T3 are different. Thus, by coupling a fabric or substrate between each third bar segment, it will serve as a support for the upper back and / or user head.

One skilled in the art will appreciate that the length of the first left bar segment Lt1 is not necessarily the same length as the first right bar segment Lt1, since there is a difference in lengths corresponding to the thickness of had used to manufacture each scissor bar. However, the length Lt1 is standardized for illustrative reasons without affecting the subject of the present invention.

Also, a person skilled in the art will notice that the length of each first segment Lt1, second segment Lt2 and third segment Lt3 of scissor bar can vary independently or dependently on each other, without affecting the subject matter of the present invention. . In this sense, in an embodiment of the invention, either the first segment, the second segment and / or the third segment include Telescopic mechanical means to allow the lengths of said segments to be modified during use.

Fig. 7 shows a bottom view of an embodiment of the crane system 1 of the present invention, where the left and right arms 1 1 and 12 respectively with a length L are appreciated which are joined at their proximal ends to the part front of the base center 20 through the vertical pivots 21 and 22 which allow the rotation of said arms at an angle U. In one embodiment, said pivots 21 and 22 allow the free rotation of the arms around the pivot axis. . In another embodiment of the invention said pivots 21 and 22 allow gradual rotation, through staggered fixed stages released / locked by a bolt or clasp. In one embodiment of the invention, the mobile base or pedestal 10 includes a symmetrical opening and closing mechanism of arms 16 which by means of a pedal 17 allows the arms 1 1 and 12 to be separated or symmetrically joined at an angle U in both sides at the same time thus maintaining the center of mass in a stable position in a single movement. In one embodiment of the invention, the symmetrical opening and closing mechanism of arms 16 includes a gradual opening and / or closing system by means of different stages controlled by the same pedal 17. In one embodiment of the invention, the mechanism 16 is mechanically configured. so that the minimum separation angle is such that the separation distance between distal ends of arms is equal to or greater than the initial separation distance Lb1. In a particular mode, the initial separation distance is in the range of 0 to 80 cm. In one embodiment of the invention, the mechanism 16 is mechanically configured so that the minimum separation angle is such that the separation distance between distal ends of arms is substantially equal to the distance Lb2. In one embodiment of the invention, the mechanism 16 is mechanically configured so that the minimum separation angle is such that the separation distance between distal ends of arms is in a range within the distances Lb1 to Lb2.

Likewise, in Fig. 7 the pair of wheels 13 and 14 each coupled to each differentiated axle end segment 15 is more clearly seen, where each wheel 13 and 14 is separated from the intermediate axle a distance W. Said distance W varies according to the height of the mobile pedestal, as well as the type of tire used for wheel 13 and 14, where it is calculated and / or selected in accordance with the average imperfections found in cities, particularly on sidewalks (including the average height of the sidewalks) and / or irregularities in the land on the banks of the streets where the transfer of a wheelchair to a vehicle would take place. In one embodiment of the invention, the arrangement of wheels with differentiated axles 15 is coupled to the mobile base or pedestal 10 by means of a bearing parallel to the Y axis, where the bearing is rigidly coupled. In one embodiment of the invention, the coupling of said bearing includes a clearance or clearance that allows partial longitudinal rotation. of the base or mobile pedestal. In one embodiment of the invention, the arrangement of wheels with differentiated axles 15 is coupled to the mobile base or pedestal 10 by means of a horizontal bearing parallel to the Y axis, where the intermediate axis segment 152 is coupled so as to allow said wheel arrangement rotate laterally with respect to said intermediate or main axle 152 (shown in Fig. 9) and also with respect to each wheel whose axle is 151 and 153. In one embodiment of the invention, the intermediate axle segment 152 has a length which is in the range of 40 to 80 cm. In another embodiment of the invention, the bearing substantially covers the entire intermediate segment of axis 152. In a particular embodiment, the distance W is within the range of 10 to 40 cm.

Also, the distances Lb1 or distance of initial separation of arms, and Lb2 or distance of separation of differentiated wheels, define the minimum or substantially minimum width of the pair of front wheels, through arms 1 1 and 12, and the width of the pair of wheels with differentiated axle 15. In this sense, both distances have a relationship that allows maintaining the center of mass of the system 1 with load in a stable position, where the average width of a user is in the range of 35-55 cm so that said distances Lb1 and Lb2 cover said average width, and also allow the crane to be moved inside a building, where the minimum average width of a door frame is between 60 and 100cm, and also that a Wheelchair can be placed between arms 1 1 and 12 without getting in the way of others.

In one embodiment of the invention, each first segment of scissor bar Lt1 includes cushions that surround the bar for user comfort when resting their armpits there, where the cushions cover either the entire length Lt1 or a part. In one embodiment of the invention, each cushion is coupled on a linear bearing 40 and 41, thus defining a linear bearing with a cushioned cover, such that said bearing can travel along the length of the first scissor bar segment Lt1. Fig. 8 shows a front view of the mobile pedestal 10, where the symmetrical opening and closing mechanism of arms 16 is more clearly seen.

Fig. 9 shows a top view of a diagram of the arrangement of wheels with differential axle 15 in accordance with an embodiment of the present invention, wherein the main axle is divided into three parallel segments 151 or first end segment; 152 or main or intermediate segment; and 153 or second segment and end. Thus, the wheels are coupled at the ends of segments 151 and 153, so that segment 152 is where the mobile base or pedestal 10 is coupled, where the other elements of the crane system 1 are coupled. The diameter D of the wheel, as well as the separation distance between different axes W varies according to the type of irregularities in the terrain that are to be covered, as well as the standard height H of the crane system 1 that is desired. A technician in the matter will note that the length of the diameter D, of the distance W, as well as the length of the parallel segments 151, 152 and 153, may vary without affecting the subject matter of the present invention.

Fig. 10 shows a front view of the arrangement diagram of Fig. 9, wherein said arrangement is in a non-inclined position.

Fig. 1 1 shows a front view of the diagram of the arrangement of Fig. 9, wherein said arrangement is in an inclined position and it is seen that the segment 152 tilts an angle a, so that the entire crane system 1 will bow in the same way.

As a reference, the arrangement of wheels with differentiated axle being static will tend to lean towards the side where it is most heavy or towards the side where an external force has pushed or pulled it. The arrangement of wheels with a differentiated axle, being in straight motion at a certain speed, will tend to remain in a substantially non-inclined position, that is, maintaining a vertical position. Also, being in a curvilinear motion, such an arrangement will tend to lean. Example, if the curvilinear movement is to the right at a certain speed, the arrangement will lean towards the same side compensating the centrifugal force experienced.

Fig. 12 shows a front view of an arrangement of wheels with a differentiated axle where at least partially the inclination of said arrangement which, applied to the crane system 1 of the present invention, would block the rotation around the X axis has been blocked. or longitudinal rotation. In one embodiment of the invention, the blocking is carried out by means of at least two arms 1 1 and 12 which prevent the mobile base or pedestal 10 from turning said angle a. In one embodiment, the rotation is avoided by attaching the arms 1 1 and 12 to the base by means of a vertical pivot that only allows said arms to rotate with respect to said pivot maintaining an angle parallel to the horizontal. Thus, in the event that the arrangement of wheels 15 experiences an irregularity in the terrain 80 with height A, the arrangement of wheels 15 will partially absorb said irregularity by restricting, at least partially, the inclination, which will force the wheel touching said irregularity 80, which rises a height A, while the axis segment 152 only experiences a gradual elevation until reaching the height A / 2 keeping the horizontal. In one embodiment of the invention, the longitudinal rotation block is carried out at least partially. In one embodiment of the invention, the arms 1 1 and 12 allow a partial longitudinal rotation.

In one embodiment of the invention, the separation distance of the arms Lb1 is substantially the same as the separation distance between the wheels 13 and 14.

In one embodiment of the invention, a stabilizer bar is attached to the lower rear part of the tower to compensate for the adjustment to the location of the center of mass when the hitch bar is extended in its greatest length, such that said stabilizer bar allows to the operator to stand on said bar compensating the weight so that the center of mass is maintained within the zone of stability. In a particular embodiment, the stabilizer bar is coupled by means of a hinge that, when disengaged, reaches ground level where the operator can step on it. In one embodiment of the invention, there are stabilizer bars in the lower rear part of the tower and on the lateral sides of the crane. In one embodiment of the invention, a stabilizer bar is attached to each mobile base arm 10, to temporarily extend the length of said arm, thereby temporarily modifying the crane configuration to support the change in the center of mass caused by degrees of freedom. Adjustable crane.

In one embodiment of the invention, the mobile pivot 33 allows the detachable coupling of either a hitch module 30 or a harness system known in the art.

In one embodiment of the invention, the materials used to manufacture either the mobile pedestal module 10, the tower and / or the hitch module are metals with polymeric accessories. In a particular embodiment, some aluminum alloy is used, such as 6061, 6063, 7075 aluminum, etc.

In one embodiment, the bearing used for bearings and / or pivots is Nylamid.

In one embodiment of the invention, each distal end of arm 1 1 and 12 includes a wheel arrangement with a differentiated axle, wherein said arrangement may or may not include a vertical pivot that allows the arrangement to rotate relative to said vertical pivot.

A person skilled in the art will appreciate that all the mechanical means for either adjusting bars and / or elements in straight lengths or angles, can be either continuous or stepped through bolts and pre-set holes at certain distances and / or angles in where either the preset distance or the preset angle is set.

A person skilled in the art will notice that other arrangements or elements may be included in the system of the present invention without affecting the inventive and / or novel material of the present invention, such as brakes, brackets, brackets, etc.

The preceding descriptions of various modalities have been presented only for purposes of illustration and description. They are not intended to be exhaustive or intended to limit the present invention to the disclosed forms. Consequently, many modifications and variations will be apparent to professionals skilled in the art. In addition, the foregoing disclosure is not intended to limit the present invention.

Claims

one . A mobile crane base for the transfer of a person, which includes:

a base center;

at least two rigid arms, where the proximal end of each arm is coupled to the front part of the base center separated by an initial separation distance and project outside it thus defining a separation angle between arms, and at its distal end each arm includes at least one arm wheel, and where the arms include a predetermined arm length; Y

an arrangement of at least two wheels coupled to the rear of the base center, wherein said arrangement includes a crank-type spindle with three parallel axle segments separated a predetermined distance thus defining a first end segment, an intermediate segment and second end segment, where at least one wheel is engaged in each axle end segment.

2. The mobile base according to claim 1, wherein the arms are coupled to the base center through mechanical means that only allows said arms to be rotated parallel to the horizontal thus restricting, at least partially, the longitudinal rotation of base.

3. The mobile base according to claim 2, wherein the mechanical means are defined by at least one vertical pivot.

4. The mobile base according to claim 1, wherein the arrangement is coupled to the base center by means of a horizontal bearing parallel to the lateral axis where the intermediate axis segment is coupled.

5. The mobile base according to claim 4, wherein the intermediate shaft segment has a length that is in the range of 40 to 70 cm.

6. The mobile base according to claim 4, wherein the bearing substantially covers the entire length of the intermediate shaft segment.

7. The mobile base according to claim 4, wherein the bearing is coupled to the base center either rigidly or with a free space that allows partial longitudinal rotation of the base.

8. The mobile base according to claim 1, wherein the arm separation angle is adjusted by means of a symmetrical simultaneous angle opening / closing mechanism.

9. The mobile base according to claim 8, wherein the mechanism is mechanically configured so that the minimum separation angle is such that the separation distance between distal ends of arms is equal to or greater than the initial separation distance.

10. The mobile base according to claim 1, wherein the initial separation distance is in the range of 10 to 60 cm.

1 1. The mobile base according to claim 1, wherein the at least one arm wheel is of the crazy wheel type.

12. The mobile base according to claim 1, wherein the at least one arm wheel is defined by an arrangement of wheels with a differentiated axle coupled by means of a vertical pivot.

13. The mobile base according to claim 1, wherein each arm includes mechanical means for adjusting the length of said arm, either extending or contracting the length.

14. The mobile base according to claim 13, wherein the mechanical means are defined by a telescopic mechanical arrangement.

15. The movable base in accordance with any preceding claim, wherein the bearings and / or the pivots include Nylamid bearings.