WO2017008819A1

WO2017008819A1 - Mechanical device having folding and telescopic teeth for negotiating staircases and for moving over a flat surface

Info

Publication number: WO2017008819A1
Application number: PCT/DZ2016/050008
Authority: WO
Inventors: El Hadi TEBIB
Original assignee: Tebib El Hadi
Priority date: 2015-07-13
Filing date: 2016-06-12
Publication date: 2017-01-19

Abstract

The mechanical device having folding and telescopic teeth is characterized by the spontaneity of its operation, the utility of its structure and the simplicity of its composition: a fixed frame (1) and a deformable chain (2), for the one part, and a lock (3) and three flanges (4), for the other part. This mechanical device is able to be produced by the most basic embodiments of conventional mechanics. The mechanical device is aimed both at an accessory which is fitted and removed manually, with ease, simplicity and rapidity, on any wheel of any vehicle (towed or motorized) notably for the wheels of a wheelchair for disabled people, and at an integral wheel of any vehicle (towed or motorized). Regardless of its destination, this mechanical device with automatic bifunctionality (landing/staircase) allows the vehicle to climb and descend staircases without jolts and to move over a flat surface. This mechanical device automatically changes configuration depending on the type of ground (landing/staircase). The teeth (ABC) of this mechanical device adapt automatically to the profile of the staircase step negotiated. When negotiating staircases, this mechanical device is in a toothed configuration; when it leaves the staircase (climb or descent) and reaches the landing, this mechanical device automatically takes on a circular configuration and is locked automatically by way of an automatic locking mechanism (3), thereby allowing it to maintain its circular configuration throughout its movement over a flat surface.

Description

TITLE OF THE INVENTION;

Mechanical Device with foldable and telescopic folds to cross the stairs and move on a flat surface.

TECHNICAL FIELD TO WHICH THE INVENTION REFERS;

The present invention is in the field of mechanics and more specifically in that of bi automatic function devices (stair / landing) intended for the wheels to cross the stairs and move on a flat surface. The Existing Devices relate solely to the full-fledged wheel, however, the present invention fits both in the field concerning the full-fledged wheel and in that of the manual adaptability of a traveling / additional object (Accessory ) intended for any wheel of any machine (motorized or towed). Existing devices are part of fields that include: mechanical, hydraulic, electrotechnical or even electronic. On the other hand, the present invention is more in the field of basic manufacturing technologies related to conventional mechanics: lever arm, telescoping, bolting, riveting, etc. STATE OF THE PRIOR ART;

There are various technological solutions for mechanical and automatic bi functionality

(stairs / landing), such as: the caddy equipped with a triplet of wheels (the devils) but with jolts very inconvenient for the human; super sophisticated machines equipped with tracks but very complex to achieve, and therefore very expensive. There are also wheelchairs which, in addition to their permanent wheels, are equipped with additional deformable wheels but very complex so very difficult to realize (US 3179431 A 1965 -04 -20; US 3226129 A 1965 -12 -28; FR 2502090 1982-09-24; FR 2574740 1986-07-20; FR 2796027 2001-01-12; WO 2007107651 2007-09-27; CN 103142361 A 2013-06-12). However, these ingenious solutions do not seem to address the problem of automatic bi functionality through an Ambulant / Additional Mechanical Device (Accessory).

PURPOSE OF THE INVENTION;

The objectives of this invention are:

1. Equip any wheel of any machine (towed or motorized) by a Permanent or Occasional Mechanical Device (traveling / additional) that adapts manually and directly on the tire of the wheel with simplicity, ease and speed.

2. Simplify the structure, operation and composition of existing Mechanical Devices through techniques related to elementary mechanics based simply on the Lever Arm and Telescoping. STATEMENT OF FIGURES;

The Mechanical Device is presented through two (02) Planks (case of an Accessory adapted to the wheels of a disabled wheelchair):

Plate N ° 01 includes five (05) figures:

- Figure 1: presents the different stages of wheelchair movement;

(Fig: la): the wheelchair Without Accessory;

(Fig: lb): the Accessory Alone;

(Fig: the): Coupling of the accessory with the wheel;

(Fig: ld): the chair equipped with the accessory approaching the first step of the staircase; (Fig: the): the armchair equipped with the accessory crossing the staircase;

(Fig: lf): the wheelchair equipped with the accessory arrived on the landing;

(Fig: lg): the chair equipped with the accessory moving on the landing;

Figure 2 shows the chassis 1 with its rim 5 and one of its two cheeks 6,

Figure 3: (fig: 3 a): presents Chain 2 in its Circular configuration;

(fig: 3b): presents Chain 2 in its notched configuration;

Figure 4: presents the Constitution of the Accessory in its Circular configuration with the Brides 4 erected towards the outside of the Rim 5;

Figure 5 shows the constitution of the Accessory in its notched configuration with the flanges 4 straightened towards the inside of the rim 5;

Plate N ° 02 gathers four (04) figures:

Figure 6: exposes, in continuous lines, the details of the mechanical device in its notched configuration in position [1]: where the height of the step of staircase crossed is equal to 17 centimeters and where the Giron is equal to 28 centimeters ; and in broken lines, in its corresponding Circular configuration.

FIG. 7 shows, in continuous lines, the mechanical device in its configuration.

Notched in position [2]: where the height of the stair step is equal to 15 centimeters and the Giron is equal to 31 centimeters; and in broken lines, in its corresponding Circular configuration.

FIG. 8 shows, in continuous lines, the Mechanical Device in its Cranted configuration in position [3]: where the height of the stair step is equal to 18 centimeters and where the Giron is equal to 27 centimeters; and in broken lines, in its corresponding Circular configuration.

Figure 9 shows, in solid lines, the Automatic Locking Device 3 in its unlocked position; and in broken lines, in its locked position. PRESENTATION OF THE GASOLINE (SUBSTANCE) OF THE INVENTION;

A.O. Composition of the Mechanical Device.

The Mechanical Device is composed of:

A. L. One (01) Chassis 1;

A.2. One (01) Chain 2;

A3. One (01) Lock 3;

A.4. Three (03) Brides 4.

Al The chassis 1 (fig: 2) is composed of a rim 5 of circular shape having the same diameter as the tire of the wheel of the vehicle, two flat cheeks 6 each having an outer shape "notched" that of Mechanical Device in the "Stair" position and a "Circular" internal shape that of the Rim 5. The two cheeks 6 are perforated by holes 7 for their assembly with the rim 5. For the operation of the bolt 3, a groove 8 (in comma shape ^¾ ^*) is machined on one of the two cheeks 6.

A.2. Chain 2 (fig: 3) is the centerpiece of the Mechanical Device. It folds and folds (notched / circular) while being between the two cheeks 6 Chassis 1 to match its plane of symmetry with that of Chassis 1. This chain 2 is composed of links type (AB) and of type links (BC) all in the form of a circular arc (twelve (12) links for the wheelchair for the disabled):

- Each of the type links (AB) (six (06) for the case of the wheelchair) is composed of two telescopic parts (h1) and (h2) each having a shape of a circular arc (fig: 4, 5, 6, 7 and 8).

- Each of the type links (BC) (six (06) for the case of the wheelchair) is composed of three (03) telescopic pieces (gl), (g2) and (g3) each having a shape of an arc of a circle (fig: 4, 5, 6, 7 and 8). The type links (AB) and the type links (BC) are paired in pairs thus forming type (ABC) crans (six (06) for the wheelchair case) Foldable and articulated at the top (B) of the Notch (ABC) through the Mobile Axis 9 (fig: 4, 5, 6, 7 and 8).

The notches (ABC) are articulated to one another via the Mobile Axes 10 (FIGS. 4, 5, 6, 7 and 8) thus forming a single closed chain 2. Each Notch (ABC) is integral with the Chassis 1 through a Fixed Axle 11 located on the part (h2) of the link (AB) and through a fixed axis 12 located on the part (g2) of the link (BC). These fixed axes 11 and 12 constitute the points of support on which pivot, respectively, the links of the type (AB) and the links of type (BC). A3. The latch 3 (FIGS. 4, 5, 6, 7, 8 and 9) is composed of a link 13, a spring 14 (traction) and a lever 15 (FIG. 9). The link 13 with two ends (I) and (K) is integral and articulated to one of the Mobile Axles 9 of the chain 2 at its end (I). On its other end (K) is attached the lever 15 which is indirectly connected to one of the two cheeks 6 of the chassis 1 at the screw 19 through the spring 14 (traction). The entire body of the Latch 3 is embedded between the two cheeks 6 of the chassis 1, against the Joystick 15 is outside and moves along the groove 8 of the chassis 1.

A.4. The three (03) flanges 4 (fig: 4 and 5) are identical. Each of them is composed of two (02) identical jaws 16 located on either side of the chassis 1 and are coupled through a fixed axis 17 around which they pivot. The (manual) pivoting of the jaws 16 towards the center of the wheel makes it possible to secure the mechanical device with the tire of the wheel, whereas, in the opposite direction, it disengages it. The securing is accomplished by interlocking the tire between the two jaws 16 of the three (03) flanges 4 which are positioned at 120 ° degrees from each other on the chassis 1. B. The Functioning of the Mechanical Device.

B. l. Folding of the Chain 2.

Folding is as follows: As soon as the wheel is in front of the first step to be crossed, whether in the direction of the ascent or the descent, the Mechanical Device is in the locked Circular position that it is necessary to Unlock Manually to unlock the folding mechanism. Thus, when one of the Mobile Axes 10, corresponding to the point (A) of the link (AB) and the point (C) of the link (BC) which precedes it, is in contact with the nose of the first step to to cross, it exerts a force (F) (reaction directed towards the center of the wheel) which ends up bending the Chain 2 at the point (A) (fig: ld and 5).

Indeed, the force (F) acts at point (A). Since the links (AB) and (BC) are rotated, respectively, about the fixed axes 11 and 12, the force (F) is automatically and indirectly transmitted, by lever arm effect, to the other adjacent links (AB) and (BC ) which in turn automatically retransmit this force (F) to all links of Chain 2 (fig: 5). Therefore, all the links (AB) and (BC) stand up and thus form the Crans (ABC). Chain 2 folds and its configuration becomes Crantée. Theoretically, the point (A) which initially was on the circle (R), then moves to the point (Α ') on the rim 5 which is a circle (R') concentric to the circle (R) (fig: 3a , 3b). B.2. The Folding of the Chain 2.

Folding is as follows: when the wheel leaves the stairs, either in the direction of the ascent or the descent, one of the Mobile Axis 9, corresponding to the top (B) of the Cran (ABC), is found on a flat surface (fig: lf and 4). Under the effect of the weight of the machine, there is a reaction (F ') (directed towards the center of the wheel) which acts directly on the Mobile Axle 9 thus causing the links (AB) and ( BC) of the Cran (ABC) around, respectively, the fixed axes 11 and 12.

Therefore, this force (F ') is then transmitted indirectly, by Lever Arm effect, to all other links of Chain 2. The Crans (ABC) are straightened by returning to their original positions. Chain 2 then folds back to its original Circular configuration (fig: lg and 4).

Theoretically, the point (Α ') that was on the circle (R'), then moves to the point (A) and returns to its initial position on the circle (R) concentric to the circle (R ') (fig: 3a, 3b).

B.3. Absorption of compression force.

Axes 11 and 12 being fixed, thus and during the folding of the chain 2, there is compression of the piece (h2) of the link (AB) against the piece (g3) of the link (BC) at the axis Mobile 9, corresponding to the top (B) of the Cran (ABC) (fig: 4 and 5). It is the telescoping of the piece (g3) in the piece (g2) of the same link (BC), which allows the absorption of this compression.

B.4. Automatic Locking.

As soon as the Chain 2 takes the Circular form (paragraph: BI), it is Automatically Locked by means of the Lock 3 (fig: 4, 5, 6, 7, 8) and (fig: 9). Indeed, the force (F ') acts on the link 13 at point (I) forcing it to move to its new position (F). The point (K) of the rod 13 then moves along the groove 8 (Comma-shaped ^¾ ^*) to its new position (Κ ') which stops at the tail of the Comma ^¾ ^* by bias of the spring force of the spring 14 (fig: 9).

As a result, Chain 2 remains locked in its Circular configuration until it is unlocked manually (intentionally) by means of Joystick 15 (fig: 9).

B.5. The Automatic Adaptation Mechanism.

The pieces (hl) and (h2) of the link (AB), as well as the pieces (gl) and (g2) of the link (BC), slide one into the other by telescoping while ensuring the chain 2 flatness, rigidity and keeping in the same plane as that of Chassis 1.

Under the effect of the traction force (T) of the machine (fig: ld, le), the point (A) is immobilized against the nose of the step crossed, it is then the links (AB) and (BC ) of the Cran (ABC) that vary automatically (when one stretches, the other narrows and vice versa) as a function, respectively, of the Height and Giron of the stair step with which the Mechanical Device is in contact (fig: 5, 6 , 7 and 8).

C. Mounting and Disassembly of the Mechanical Device.

In the case of an accessory adaptable to the wheels of a disabled wheelchair, the assembly and disassembly of the mechanical device is performed manually and directly on the tire of the wheel of the vehicle by lateral interlocking.

In fact, after the (manual) pivoting of the jaws 16 of the flanges 4 around the axles 17 towards the outside of the rim 5 (FIG. 1b, 4), the accessory is in the free position for mounting and / or dismounting. . On the other hand, their pivoting in the opposite direction (fig: le, 5), towards the inside of the Rim 5, accomplishes the fastening of the Accessory with the tire of the wheel.

This fastening is therefore achieved by fitting the tire of the wheel between the two jaws 16 of each of the three (03) flanges 4 (Fig: and 5).

MODE OF CARRYING OUT THE INVENTION

In the case of an Accessory for a wheelchair, the Mechanical Device is feasible according to the conventional mode:

The Chassis 1 consists of an ordinary Rim 5 (bicycle) and two cheeks 6 aluminum plate (20/10 ^eme ) assembled by means of rivets M4 (or welding).

Chain 2: The fixed parts of all links of type (AB) and (BC) consist of tube sections of square section (20 mm x 20 mm). The sliding parts are in square tube profiles (16 mm x 16 mm);

- Type 9 and 10 movable axles consist of M4 elastic pins;

- Type 11 and 12 fixed axles are composed of M6 nut-bolt-nuts.

The lock 3 is constituted by a rod 13 made of aluminum plate (20/10 ^th), a wheel 14 of spring 08 and a handle 15 of plastics material.

The flanges 4 are aluminum plate of thickness 20/10 ^th.

The assembly of the Rim 5 with the cheeks 6 is achieved by riveting or welding.

The assembly of the Flanges 4 with the Chassis 1 is ensured by bolts M4 nuts.

The cutting and finishing of the cuts of the different parts are carried out using a conventional electric and / or manual saw and a chainsaw.

The shaping of the different parts (circular profile) is carried out using a manual bending machine.

Claims

THE REVENDICATIONS

1. Mechanical Device with foldable and telescopic latches, characterized in that it is intended not only for an accessory (traveling / additional) adaptable to any wheel, including those of a disabled wheelchair, but also to any wheel to Full share of any vehicle (towed or motorized) to allow it not only to cross the steps without jolts, by automatically folding and automatically adapting to their profiles, but also to fold automatically and to lock automatically on its circular configuration allowing him, as soon as he arrived on the landing, to continue his journey naturally.

2. Mechanical Device according to Claim No. 1, characterized in that it consists of links of the type (AB) comprising two telescopic parts (h1) and (h2) in the shape of an arc and by links of type (BC) comprising three telescopic pieces (gl), (g2) and (g3) in the form of an arc of a circle paired in pairs and articulated by means of a Mobile Axis (9) at the top (B) of the Cran (ABC) where each of them is articulated to the other by means of the Mobile Axes (10) thus forming a single Chain (2) closed, Foldable and Telescopic Crans, which folds and folds while being between the two cheeks (6) of the frame (1) with which it is secured through the fixed axes (11) and (12).

3. Mechanical device according to Claims 1 and 2, characterized in that each of the links of the type (AB) and each of the links of the type (BC) respectively pivot about the fixed axes (11) and (12), thus allowing the mechanical and automatic transmission, by the effect of the Lever Arm, the folding force and folding to all the Crans.

4. Mechanical device according to claims 1 and 2, characterized in that each of the links of type (AB) is composed of two telescopic parts (h1) and (h2) and each of the links of type (BC) is composed of three telescopic parts (gl), (g2) and (g3), thus allowing, by telescoping effect, the variation of their respective length (when one stretches, the other narrows), in order to automatically adapt to the profile of the staircase step.

Mechanical device according to claims 1 and 2, characterized in that the chain

(2) Foldable and Telescopic Cleats, mechanically and automatically locks each time the wheel accesses a flat surface, leaving the staircase (up or down) through the Lock (3), allowing it to avoid folding and maintain it in its Circular configuration when moving on the flat surface approached.

6. Mechanical device according to claims 2 and 4, characterized in that the parts (g2) and (g3) of the link (BC) are telescopic thus allowing the absorption of the compressive force at the level of the Mobile axis (9) when folding chain 2.

7. Mechanical device according to claim 2, characterized in that it is composed of: a frame (1), a chain (2), a lock (3) (for any destination) and three flanges (4) (in the case of an Accessory).

8. Mechanical device according to claims No. 1, No. 2 and No. 7, characterized in that the frame (1) is composed of a rim (5) circular allowing it to fit directly on the tire of the wheel (case of an Accessory) and two cheeks (6) symmetrical, located on both sides of the Rim (5) where each of them is of a circular inner shape, that of the Rim (5) and a notched external shape supporting the chain (2) when crossing the stairs.

9. Mechanical device according to claims No. 1, No. 7 and No. 8, characterized in that its attachment to the wheel (in the case of an accessory) is manually performed by direct lateral engagement of the rim (5) on the tire of the wheel and by the manual pivoting of the three flanges (4) around their axes (17).