A foldable wheelchair ladder with high stability

Abstract

A foldable wheelchair ladder with high stability includes a wheelchair deck, wherein the wheelchair deck is composed of a left access board and a right access board, and the right side of the left access board and the left side of the right access board are hinged by a plurality of hinge devices evenly distributed laterally; the left access board is composed of a plurality of left folding boards evenly distributed laterally; the right access board is composed of a plurality of right folding boards evenly distributed laterally; the left folding boards and the right folding boards are hinged by folding devices; the folding devices are connected to supporting devices that match them; the left folding board and the right folding board located at the front are both provided with a landing board. The foldable wheelchair ladder with high stability of the present invention can effectively ensure the strength of the wheelchair ladder when in use, thereby ensuring the stability of the wheelchair when passing through the wheelchair ladder, and achieving a high stability effect.

Description

Technical Field

[0001] The invention relates to a wheelchair ladder, in particular to a foldable wheelchair ladder with high stability. Background Art

[0002] A wheelchair ladder is a device that facilitates the passage of wheelchairs over stairs. In real life, not all stairs have smooth slopes on the sides for wheelchairs to pass through. Therefore, in such a situation, the wheelchair user can only be carried over the stairs on their back and then the wheelchair can be moved over the stairs alone, or the wheelchair can be lifted directly and the wheelchair user can be lifted over the stairs together. This method of navigating stairs is extremely troublesome and labor-intensive, and it is not something that can be done by one person. However, a wheelchair ladder can quickly create a smooth slope on the side of the stairs, allowing wheelchairs to quickly pass through the stairs. However, a traditional wheelchair ladder is a simple plate-like structure with one end resting on a high point and the other end supported on the ground. The stability of the wheelchair ladder is guaranteed only by its two ends, resulting in insufficient strength for the wheelchair to pass through the middle of the wheelchair ladder and its inability to withstand excessive pressure. When the wheelchair reaches the middle of the wheelchair ladder, the wheelchair ladder is prone to instability. If the wheelchair ladder shakes during the process of passing, accidents are very likely to occur. In serious cases, the wheelchair ladder may even collapse when it reaches the middle of the wheelchair ladder, posing a serious safety hazard. Summary of the Invention

[0003] The present invention aims to solve the existing technical problem by providing a foldable wheelchair ladder with high stability, which can effectively ensure the strength of the wheelchair ladder when in use, thereby ensuring the stability of the wheelchair when passing through the wheelchair ladder, achieving a high stability effect.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] The present invention discloses a foldable wheelchair ladder with high stability, comprising a wheelchair board, characterized in that: the wheelchair board is composed of a left passage board and a right passage board, and the right side of the left passage board and the left side of the right passage board are hinged by a plurality of hinge devices that are evenly distributed laterally; the left passage board is composed of a plurality of left folding boards that are evenly distributed laterally; the right passage board is composed of a plurality of right folding boards that are evenly distributed laterally; the left folding boards and the right folding boards are hinged by folding devices; the folding devices are connected to a supporting device matched therewith; the left folding board located at the frontmost side and the right folding board located at the frontmost side are both provided with a landing board.

[0006] The folding device includes a rear hinged plate arranged on the left and right sides of the lower surface of the front end of the rear left folding plate and the left and right sides of the lower surface of the front end of the rear right folding plate; a front hinged plate unit on the left and right sides of the lower surface of the rear end of the front left folding plate and the left and right sides of the lower surface of the rear end of the front right folding plate; the front hinged plate unit is composed of two front hinged plates; there is a hinge gap between the front hinged plates, the front end of the rear hinged plate penetrates into the hinge gap, and the front hinged plate and the front end of the rear hinged plate are hinged through a hinge shaft.

[0007] The support device includes a U-shaped support frame; the support frame includes an adjusting rod located on the left and right sides thereof, and the outer surface of the adjusting rod is provided with an external thread; the end of the adjusting rod is screwed to a support arm through the external thread, and the end of the support arm is connected to the hinge shaft; a number of adjusting nuts are screwed on the adjusting rod; the left and right sides of the lower surface of the front left folding plate and the left and right sides of the lower surface of the front right folding plate are provided with mutually symmetrical hinge seats; the hinge seat is hinged with a limit rod, and the left and right limit rods are connected by a connecting rod; the distance between the outer ends of the left and right limit rods is greater than the distance between the outer ends of the left and right adjusting rods, and the distance between the outer ends of the left and right limit rods is smaller than the distance between the outer ends of the left and right adjusting nuts, and the limit rod is stuck on the upper end surface of the adjusting nut; the limit rod, the adjusting rod, the support arm and the left folding plate and the limit rod, the adjusting rod, the support arm and the right folding plate all enclose a triangular structure.

[0008] The left folding plate and the right folding plate are both provided with a number of screw seats corresponding to the position of the support frame; a limit screw is screwed on the screw seat; the screw body of the limit screw is covered with a magnet ring, the inner diameter of the magnet ring is larger than the outer diameter of the screw body of the limit screw, and the inner diameter of the magnet ring is smaller than the outer diameter of the head of the limit screw, and the magnet ring can move along the screw body of the limit screw through its own inner hole; the support frame is made of metal material that can be attracted to the magnet ring.

[0009] The outer sleeve of the adjusting rod is provided with several anti-wear sleeves distributed adjacent to the adjusting nut. The inner diameter of the anti-wear sleeve is larger than the diameter of the adjusting rod, and the adjusting nut is located below the anti-wear sleeve adjacent to it; the distance between the outer ends of the left and right anti-wear sleeves is smaller than the distance between the outer ends of the left and right adjusting nuts.

[0010] The upper surfaces of the left folding plate, the right folding plate and the strapping plate are all provided with a plurality of anti-slip strips uniformly distributed laterally.

[0011] The hinge device is a hinge, and the connecting plates on the left and right sides of the hinge are respectively fixed to the left passage plate and the right passage plate by screws.

[0012] The lower surface of the butt plate is provided with a plurality of evenly distributed anti-skid teeth, and the anti-skid teeth are in strip shape.

[0013] The angles formed between the lower surface of the strap plate and the lower surface of the left folding plate located at the front side, and between the lower surface of the strap plate and the lower surface of the right folding plate located at the front side are both obtuse angles.

[0014] The left edge of the left passage plate and the right edge of the right passage plate both extend upwards to form baffles.

[0015] The beneficial effects of the present invention are:

[0016] Compared with the prior art, the foldable wheelchair ladder with high stability adopting the structure of the present invention can be folded by a hinge device and a folding device, effectively reducing the space occupied by the wheelchair ladder, facilitating the placement and transportation of the wheelchair ladder, and can support the suspended part of the wheelchair ladder by a supporting device. When the number of support points increases, the strength of the wheelchair ladder can be effectively improved and can withstand greater pressure, thereby ensuring the stability of the wheelchair when passing through the wheelchair ladder, achieving a high stability effect, and effectively avoiding the situation where the wheelchair ladder shakes due to insufficient strength of the wheelchair ladder when the wheelchair passes through the wheelchair ladder, eliminating the occurrence of accidents, and effectively ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a foldable wheelchair ladder with high stability according to the present invention from one angle;

[0018] Figure 2 yes Figure 1 An enlarged view of part A;

[0019] Figure 3 yes Figure 1 An enlarged view of part B;

[0020] Figure 4 It is a partial structural schematic diagram of a foldable wheelchair ladder with high stability at one angle of the present invention;

[0021] Figure 5 This is a schematic structural diagram of the foldable wheelchair ladder with high stability according to the present invention from another angle;

[0022] Figure 6 yes Figure 5 An enlarged view of part C;

[0023] Figure 7 It is a partial structural schematic diagram of the foldable wheelchair ladder with high stability from another angle of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] See also Figures 1 to 7The present invention provides a foldable wheelchair ladder with high stability, comprising a wheelchair board 1, wherein the wheelchair board 1 is composed of a left access board 2 and a right access board 3, and the right side of the left access board 2 and the left side of the right access board 3 are hinged by a plurality of hinge devices that are uniformly distributed laterally; the left access board 2 is composed of a plurality of left folding boards 4 that are uniformly distributed laterally; the right access board 3 is composed of a plurality of right folding boards 5 that are uniformly distributed laterally; the left folding boards 4 and the right folding boards 5 are hinged by a folding device; the folding device is connected to a supporting device matched therewith; the left folding board 4 located at the front and the right folding board 5 located at the front are both provided with a strap 101.

[0026] The folding device includes a rear hinged plate 6 arranged on the left and right sides of the lower front end surface of the rear left folding plate 4 and the left and right sides of the lower front end surface of the rear right folding plate 5; a front hinged plate unit on the left and right sides of the lower rear end surface of the front left folding plate 4 and the left and right sides of the lower rear end surface of the front right folding plate 5; the front hinged plate unit is composed of two front hinged plates 7; there is a hinge gap 8 between the front hinged plates 7, the front end of the rear hinged plate 6 penetrates into the hinge gap 8, and the front hinged plate 7 and the front end of the rear hinged plate 6 are hinged through a hinge shaft 9.

[0027] The support device includes a U-shaped support frame 10; the support frame 10 includes adjustment rods 11 located on the left and right sides thereof, and the outer surface of the adjustment rod 11 is provided with an external thread 12; the end of the adjustment rod 11 is screwed to a support arm 13 through the external thread 12, and the end of the support arm 13 is connected to the hinge shaft 9; a plurality of adjustment nuts 14 are screwed to the adjustment rod 11; the left and right sides of the lower surface of the front left folding plate 4 and the left and right sides of the lower surface of the front right folding plate 5 are provided with mutually symmetrical hinge seats 15; the hinge seats 15 are hinged to a limit rod 16 The left and right limit rods 16 are connected by a connecting rod 17; the distance between the outer ends of the left and right limit rods 16 is greater than the distance between the outer ends of the left and right adjustment rods 11, and the distance between the outer ends of the left and right limit rods 16 is smaller than the distance between the outer ends of the left and right adjustment nuts 14, and the limit rod 16 is stuck on the upper end surface of the adjustment nut 14; the limit rod 16, the adjustment rod 11, the support arm 13 and the left folding plate 4 and the limit rod 16, the adjustment rod 11, the support arm 13 and the right folding plate 5 all enclose a triangular structure.

[0028] The left folding plate 4 and the right folding plate 5 are both provided with a number of screw seats 18 corresponding to the position of the support frame 10; a limit screw 19 is screwed on the screw seat 18; the screw body of the limit screw 19 is covered with a magnet ring 20, the inner diameter of the magnet ring 20 is larger than the outer diameter of the screw body of the limit screw 19, and the inner diameter of the magnet ring 20 is smaller than the outer diameter of the head of the limit screw 19, and the magnet ring 20 can move along the screw body of the limit screw 19 through its own inner hole; the support frame 10 is made of metal material that can be attracted to the magnet ring 20.

[0029] The adjusting rod 11 is covered with several anti-wear sleeves 21 distributed adjacent to the adjusting nut 14. The inner diameter of the anti-wear sleeve 21 is larger than the diameter of the adjusting rod 11, and the adjusting nut 14 is located below the adjacent anti-wear sleeve 21; the distance between the outer ends of the left and right anti-wear sleeves 21 is smaller than the distance between the outer ends of the left and right adjusting nuts 14.

[0030] The upper surfaces of the left folding plate 4 , the right folding plate 5 and the strap 101 are all provided with a plurality of anti-slip strips 22 evenly distributed laterally.

[0031] The hinge device is a hinge 23, and the connecting plates 2301 on the left and right sides of the hinge 23 are respectively fixed to the left passage plate 2 and the right passage plate 3 by screws.

[0032] The lower surface of the butt plate 101 is provided with a plurality of evenly distributed anti-slip teeth 24 , and the anti-slip teeth 24 are in the shape of strips.

[0033] The angles formed between the lower surface of the butt plate 101 and the lower surface of the left folding plate 4 located at the front, and between the lower surface of the butt plate 101 and the lower surface of the right folding plate 5 located at the front are both obtuse angles.

[0034] The left edge of the left passage plate 2 and the right edge of the right passage plate 3 both extend upward to form a baffle 25 .

[0035] The method of use of the present invention is as follows:

[0036] When the wheelchair ladder is not in use, the wheelchair ladder can be folded to reduce the space it occupies and facilitate the placement and transportation of the wheelchair ladder. When the wheelchair ladder needs to be folded, the connecting rod 17 can be held with one hand and the support frame 10 with the other hand. The hand holding the connecting rod 17 can drive the limit rod 16 to move, so that the limit rod 16 is swung up with the hinge seat 15 as the center, thereby moving to a position away from the adjusting nut 14, so that the adjusting nut 14 can no longer limit the limit rod 16. At this time, the hand holding the support frame 10 can swing the support frame 10. When the support frame 10 is hinged When the shaft 9 swings as the center, the adjusting rod 11 of the support frame 10 gradually disengages from between the limit rods 16 on the left and right sides. Since the distance between the outer ends of the limit rods 16 on the left and right sides is greater than the distance between the outer ends of the adjusting rods 11 on the left and right sides, the adjusting rod 11 can smoothly disengage from between the limit rods 16 on the left and right sides without contacting the limit rods 16. Then the limit rod 16 can be further rotated to make it fit close to the lower surface of the left folding plate 4 and the lower surface of the right folding plate 5, and the support frame 10 also fits close to the lower surfaces of the left folding plate 4 and the right folding plate 5.

[0037] When the support frame 10 is close to a certain degree, the magnet ring 20 will be attracted to the support frame 10, thereby fixing the support frame 10 on the lower surface of the left folding plate 4 and the lower surface of the right folding plate 5 through the mutual suction. At this time, the support frame 10 presses the connecting rod 17 on the lower surface of the left folding plate 4 and the lower surface of the right folding plate 5, so that the position of the limit rod 16 is limited, and at the same time it has the effect of fixing the limit rod 16, effectively avoiding the situation where the limit rod 16, the support frame 10 and other components are scattered when the left folding plate 4 and the right folding plate 5 are folded, making the folding work difficult.

[0038] Then, the left folding plate 4 and the right folding plate 5 can be folded forward and backward respectively through the front hinge plate 7 and the rear hinge plate 6 hinged to each other, and the right side of the left access plate 2 and the left side of the right access plate 3 are hinged by a number of hinge devices that are evenly distributed laterally. The hinge device is a hinge 23, and the connecting plates 2301 on the left and right sides of the hinge 23 are fixed to the left access plate 2 and the right access plate 3 by screws respectively. The left access plate 2 is composed of a number of left folding plates 4, and the right access plate 3 is composed of a number of right folding plates 5. Therefore, after the left folding plate 4 and the right folding plate 5 complete their respective forward and backward folding, the left folding plate 4 and the right folding plate 5 can be folded with each other through the hinges, further reducing the space occupied by the wheelchair ladder after folding.

[0039] The left and right folding plates 4 can be used to form a left access plate 2 and a right access plate 3, respectively, so that the wheelchair can pass the stairs smoothly.

[0040] When using the support device, the support frame 10 can be swung according to the inclination of the wheelchair ladder after it is placed, so that the lower end of the support frame 10 is pressed against the ground. During the swinging process of the support frame, the limit rod can be rotated according to the final swing angle of the support frame 10, so that the limit rod 16 moves to the top of the appropriate adjustment nut 14. Since the distance between the outer ends of the left and right limit rods 16 is greater than the distance between the outer ends of the left and right adjustment rods 11, the adjustment rod 11 can smoothly enter between the left and right limit rods 16 during the movement of the limit rod 16, and the distance between the outer ends of the left and right limit rods 16 is less than the distance between the outer ends of the left and right adjustment nuts 14. When the limit rod 16 falls freely, it will straighten When the wheelchair ladder is placed in different places, the height of the middle position of the wheelchair ladder is different. Therefore, with the presence of multiple adjusting nuts, no matter how much the support frame 10 swings, the limit rod 16 can be stuck on one of the appropriate adjusting nuts to ensure the stability of the support device when in use.

[0041] From the above, it can be seen that the present invention can fold the wheelchair ladder through the hinge device and the folding device, effectively reducing the space occupied by the wheelchair ladder, facilitating the placement and transportation of the wheelchair ladder, and can support the suspended part of the wheelchair ladder through the supporting device. When the number of support points increases, the strength of the wheelchair ladder can be effectively improved and can withstand greater pressure, thereby ensuring the stability of the wheelchair when passing through the wheelchair ladder, achieving a high stability effect, and effectively avoiding the situation where the wheelchair ladder shakes due to insufficient strength of the wheelchair ladder when the wheelchair passes through the wheelchair ladder, preventing accidents from happening, and effectively ensuring safety.

[0042] The adjusting rod 11 is covered with several anti-wear sleeves distributed adjacent to the adjusting nut 14. The adjusting nut 14 is located below the anti-wear sleeve 21 adjacent to it. The distance between the outer ends of the left and right anti-wear sleeves 21 is smaller than the distance between the outer ends of the left and right adjusting nuts 14. The presence of the anti-wear sleeve 21 can replace the direct contact between the external thread 12 and the limiting rod 16, effectively avoiding the situation where the limiting rod 16 collides with the external thread 12 for a long time and causes wear of the external thread 12. Since the inner diameter of the anti-wear sleeve 21 is larger than the diameter of the adjusting rod 11, when the adjusting nut 14 moves up and down, the anti-wear sleeve 21 will move up and down accordingly, thereby ensuring the anti-wear effect of the anti-wear sleeve 21 to the greatest extent.

[0043] Since the angles formed between the lower surface of the butt board 101 and the lower surface of the left folding board 4 located at the front side, and between the lower surface of the butt board 101 and the lower surface of the right folding board 5 located at the front side are both obtuse angles, it can ensure that the slope of the wheelchair ladder is small and tends to be flat after it is placed through the butt board 101, effectively improving the safety of the wheelchair when passing through the wheelchair ladder.

[0044] The upper surfaces of the left folding plate 4, the right folding plate 5 and the ramp 101 are all provided with a plurality of anti-slip strips 22 evenly distributed laterally. The presence of the anti-slip strips 22 can effectively increase the friction between the wheelchair wheels and the wheelchair ladder, and effectively prevent the wheelchair ladder from passing too fast due to the upper surface being too smooth, causing accidents.

[0045] The lower surface of the buttress 101 is provided with a number of evenly distributed anti-skid teeth 24, which are strip-shaped. The presence of the anti-skid teeth 24 can effectively increase the friction between the buttress 101 and the high step surface, play an anti-skid effect, and further ensure the stability of the wheelchair ladder when placed.

[0046] The left edge of the left passage plate 2 and the right edge of the right passage plate 3 both extend upwards with a baffle 25, which can effectively prevent the wheelchair from driving out of the wheelchair ladder when passing through the wheelchair ladder and causing accidents.

Claims

1. A foldable wheelchair ladder with high stability, comprising a wheelchair board, characterized in that: The wheelchair board is composed of a left passage board and a right passage board, and the right side of the left passage board and the left side of the right passage board are hinged by a number of hinge devices that are evenly distributed laterally; the left passage board is composed of a number of left folding boards that are evenly distributed laterally; the right passage board is composed of a number of right folding boards that are evenly distributed laterally; the left folding boards and the right folding boards are hinged by folding devices; the folding devices are connected to supporting devices that match them; the left folding board located at the front and the right folding board located at the front are both provided with a board; the folding device includes rear hinged plates provided on the left and right sides of the lower surface of the front end of the rear left folding board and on the left and right sides of the lower surface of the front end of the rear right folding board; the The front hinge plate units on the left and right sides of the lower surface of the rear end of the front left folding plate and the left and right sides of the lower surface of the rear end of the front right folding plate; the front hinge plate units are composed of two front hinge plates; there is a hinge gap between the front hinge plates, the front end of the rear hinge plate penetrates into the hinge gap, and the front hinge plate and the front end of the rear hinge plate are hinged by a hinge shaft; the support device includes a U-shaped support frame; the support frame includes an adjustment rod located on its left and right sides, and the outer surface of the adjustment rod is provided with an external thread; the end of the adjustment rod is screwed with a support arm through the external thread, and the end of the support arm is connected to the hinge shaft; a number of adjustment nuts are screwed on the adjustment rod; the left and right sides of the lower surface of the front left folding plate and the lower surface of the front right folding plate The left and right sides are provided with mutually symmetrical hinge seats; the hinge seat is hinged with a limit rod, and the limit rods on the left and right sides are connected by a connecting rod; the distance between the outer ends of the left and right limit rods is greater than the distance between the outer ends of the left and right adjustment rods, and the distance between the outer ends of the left and right limit rods is smaller than the distance between the outer ends of the left and right adjustment nuts, and the limit rod is clamped on the upper end surface of the adjustment nut; the limit rod, adjustment rod, support arm and left folding plate and the limit rod, adjustment rod, support arm and right folding plate are all enclosed to form a triangular structure; the left folding plate and the right folding plate are both provided with a number of screw seats corresponding to the positions of the support frames; a limit screw is screwed on the screw seat; the limit screw The outer sleeve of the screw body is provided with a magnet ring, the inner diameter of the magnet ring is larger than the outer diameter of the screw body of the limit screw, and the inner diameter of the magnet ring is smaller than the outer diameter of the head of the limit screw. The magnet ring can move along the screw body of the limit screw through its own inner hole; the support frame is made of metal material that can be attracted to the magnet ring; the outer sleeve of the adjusting rod is provided with a plurality of anti-wear sleeves distributed adjacent to the adjusting nut, the inner diameter of the anti-wear sleeve is larger than the diameter of the adjusting rod, and the adjusting nut is located below the anti-wear sleeve adjacent to it; the distance between the outer ends of the left and right anti-wear sleeves is smaller than the distance between the outer ends of the left and right adjusting nuts; the angles formed between the lower surface of the strap plate and the lower surface of the left folding plate located at the front side, and between the lower surface of the strap plate and the lower surface of the right folding plate located at the front side are both obtuse angles.

2. A foldable wheelchair ladder with high stability according to claim 1, characterized in that: The upper surfaces of the left folding plate, the right folding plate and the strapping plate are all provided with a plurality of anti-slip strips uniformly distributed laterally.

3. The foldable wheelchair ladder with high stability according to claim 1, characterized in that: The hinge device is a hinge, and the connecting plates on the left and right sides of the hinge are respectively fixed to the left passage plate and the right passage plate by screws.

4. The foldable wheelchair ladder with high stability according to claim 1, characterized in that: The lower surface of the butt plate is provided with a plurality of evenly distributed anti-skid teeth, and the anti-skid teeth are in strip shape.

5. The foldable wheelchair ladder with high stability according to claim 1, characterized in that: The left edge of the left passage plate and the right edge of the right passage plate both extend upwards to form baffles.

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