Wheelchair ramp aid

Abstract

The utility model belongs to wheelchair technical field especially, and especially is a kind of wheelchair barrier-free ramp auxiliary wheel, to the existing wheelchair barrier-free ramp auxiliary wheel inconveniently adjusts the problem of ground sensitivity, present and propose the following scheme, it includes: two fixed plates fixedly installed in wheelchair rear side;Two rotating grooves are respectively located in one side of two fixed plates, and same rotating shaft is rotatably installed in two rotating grooves;Two support arms are fixedly installed on the outside of rotating shaft, and the bottom end of two support arms is equipped with auxiliary wheel body, and same connecting rod is fixedly installed on two support arms;Multiple locking grooves are divided into two groups, and two groups of locking grooves are annularly distributed at the outside of both ends of rotating shaft at equal distance;Locking mechanism is located on two fixed plates, for fixing rotating shaft by cooperating with locking groove, the utility model cooperates with multiple locking grooves by locking mechanism, and user can easily adjust the angle of rotating shaft, to change the height of auxiliary wheel body ground.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, and in particular to wheelchair ramp assistance wheels. Background Technology

[0002] Wheelchair ramp assist wheels typically refer to a device installed at the rear of a wheelchair to provide additional stability and safety when going up or down ramps, preventing the wheelchair from tipping over.

[0003] In the existing technology, wheelchair ramp assist wheels are not easy to adjust the ground contact sensitivity (i.e., how high the front wheels need to be raised for them to work), and cannot meet different usage needs. Therefore, we have proposed wheelchair ramp assist wheels to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that wheelchair ramp auxiliary wheels are not easy to adjust the ground contact sensitivity, and therefore proposes a wheelchair ramp auxiliary wheel.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: Wheelchair accessible ramp assist wheels, including: Two mounting plates are fixedly installed on the rear side of the wheelchair; Two rotating slots are respectively located on one side of two fixed plates, and the same rotating shaft is rotatably installed in the two rotating slots; Both support arms are fixedly installed on the outside of the rotating shaft. The bottom end of both support arms is equipped with an auxiliary wheel body. The same connecting rod is fixedly installed on both support arms. Multiple locking slots are divided into two groups, and the two groups of locking slots are distributed in a ring at equal intervals on the outer sides of both ends of the rotating shaft; The locking mechanism, located on two fixed plates, is used to fix the rotating shaft in conjunction with the locking groove.

[0006] Preferably, the locking mechanism includes two locking rods, each corresponding to a locking slot.

[0007] Preferably, each of the two fixing plates has a vertical hole at its top, and the two vertical holes are respectively connected to two rotating slots, and the two locking rods are respectively slidably installed in the two vertical holes.

[0008] Preferably, the inner walls of the two vertical holes are provided with reset grooves, and reset blocks are slidably installed in the two reset grooves. The two reset blocks are respectively connected to the two locking rods.

[0009] Preferably, one end of a spring is fixedly installed on the top of each of the two reset blocks, and the other end of the spring is fixedly connected to the top inner wall of the reset groove.

[0010] Preferably, the top of the two locking rods is fixedly mounted with the same pull plate, which is located above the two fixed plates.

[0011] Compared with the prior art, the advantages of this utility model are: Easy adjustment of ground contact sensitivity: Through the cooperation of the locking mechanism and multiple locking slots, users can easily adjust the angle of the rotating shaft, thereby changing the ground contact height of the auxiliary wheel body (i.e., how high the front wheel needs to be lifted before the auxiliary wheel takes effect). This design meets the needs of stability and flexibility in different usage scenarios (such as steep slopes, gentle slopes, or flat ground), avoiding the problem of inflexible adjustment in existing technologies.

[0012] Simple and quick to operate: Users simply pull the pull plate upwards to unlock the rotating shaft, adjust the support arm angle, and then release the pull plate. The spring will automatically push the locking lever into the locking slot, achieving quick locking. The entire adjustment process requires no tools, saving time and effort, making it especially suitable for wheelchair users to operate independently.

[0013] Stable and reliable structure: The spring return and locking rod-locking groove locking structure ensures that the auxiliary wheel body is firmly fixed after adjustment, preventing accidental loosening during use. Multiple locking grooves provide multiple preset angle positions, ensuring high adjustment precision and enhancing the safety and stability of the wheelchair on ramps.

[0014] Highly versatile and easy to install: This device can be directly mounted on the rear mounting plate of a wheelchair, with a compact structure that does not take up much space. It is suitable for most wheelchair models, requiring no major modifications to the wheelchair, making it easy to promote and use.

[0015] Enhanced safety: By adjusting the ground contact sensitivity of the auxiliary wheels, the wheelchair can be effectively prevented from tipping over when going up or down slopes due to the front wheels lifting too high. At the same time, it avoids unnecessary dragging of the auxiliary wheels on flat roads, thus improving the overall safety and comfort of wheelchair use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the wheelchair accessibility ramp auxiliary wheel proposed in this utility model; Figure 2 This is a side view of the fixing plate, rotating shaft, support arm, and connecting rod of the wheelchair accessible ramp auxiliary wheel proposed in this utility model. Figure 3 The wheelchair ramp auxiliary wheel proposed in this utility model Figure 2 A magnified structural diagram of part A in the middle; Figure 4 The wheelchair ramp auxiliary wheel proposed in this utility model Figure 1 A magnified structural diagram of part B.

[0017] In the diagram: 1. Fixed plate; 2. Rotating groove; 3. Rotating shaft; 4. Support arm; 5. Auxiliary wheel body; 6. Connecting rod; 7. Locking groove; 8. Vertical hole; 9. Locking rod; 10. Pull plate; 11. Reset block; 12. Spring; 13. Magnet; 14. Iron sheet; 15. Reset groove; 16. Wheelchair. Detailed Implementation

[0018] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this embodiment, and not all embodiments. Example

[0019] Reference Figures 1-4 Wheelchair accessible ramp assist wheels, including: Two fixing plates 1 are fixedly installed on the rear side of the wheelchair; Two rotating slots 2 are respectively located on one side of two fixed plates 1, and the same rotating shaft 3 is rotatably installed in the two rotating slots 2; Two support arms 4 are fixedly installed on the outside of the rotating shaft 3. The bottom end of each support arm 4 is equipped with an auxiliary wheel body 5. The same connecting rod 6 is fixedly installed on the two support arms 4. Multiple locking grooves 7 are divided into two groups, and the two groups of locking grooves 7 are distributed in a ring at equal intervals on the outer sides of both ends of the rotating shaft 3; The locking mechanism is located on two fixed plates 1 and is used to fix the rotating shaft 3 in conjunction with the locking groove 7.

[0020] In this embodiment, the locking mechanism includes two locking rods 9, and the two locking rods 9 are respectively engaged with two locking slots 7.

[0021] In this embodiment, the top of each of the two fixing plates 1 is provided with a vertical hole 8, and the two vertical holes 8 are respectively connected to the two rotating grooves 2. The two locking rods 9 are respectively slidably installed in the two vertical holes 8.

[0022] In this embodiment, the inner walls of the two vertical holes 8 are provided with reset grooves 15, and reset blocks 11 are slidably installed in the two reset grooves 15. The two reset blocks 11 are respectively fixedly connected to the two locking rods 9.

[0023] In this embodiment, one end of a spring 12 is fixedly installed on the top of each of the two reset blocks 11, and the other end of the spring 12 is fixedly connected to the top inner wall of the reset groove 15.

[0024] In this embodiment, the top of the two locking rods 9 is fixedly installed with the same pull plate 10, and the pull plate 10 is located above the two fixed plates 1.

[0025] Working principle: Initial installation and status: such as Figure 1As shown, two fixing plates 1 are fixedly mounted on the rear frame of the wheelchair 16. Under normal conditions, the rotating shaft 3 is rotatably connected by inserting its two ends into the rotating slots 2 of the fixing plates 1. The support arm 4, the auxiliary wheel body 5, and the connecting rod 6 form a single unit and can rotate together with the rotating shaft 3. The lower end of the locking rod 9 engages with one of the locking slots 7 at the end of the rotating shaft 3 (e.g., ...). Figure 3 , Figure 4 As shown), this locks the rotating shaft 3. At this time, the auxiliary wheel body 5 is maintained at a specific height, and the sensitivity of the auxiliary wheel touching the ground when the front wheel of the wheelchair is lifted is set.

[0026] Adjustment process: Unlocking: When it is necessary to adjust the ground contact sensitivity, the user pulls the pull plate 10 upwards. The pull plate 10 causes the two locking levers 9 to slide upwards synchronously within the vertical hole 8.

[0027] Compression spring: When the locking lever 9 moves upward, it will drive the reset block 11 connected to it to slide upward in the reset groove 15, thereby compressing the spring 12 and accumulating reset force.

[0028] Unlocking: When the lower end of the locking lever 9 is completely disengaged from the current locking slot 7, the lock on the rotating shaft 3 is released.

[0029] Angle Adjustment: At this time, the user can push the connecting rod 6 or directly move the support arm 4 to allow the rotating shaft 3 to rotate freely within the rotating groove 2. The support arm 4 drives the auxiliary wheel body 5 to swing accordingly, changing its relative height with the ground. Multiple locking grooves 7 at the end of the rotating shaft 3 provide multiple preset, equally spaced angle positioning points.

[0030] Relocked: When the auxiliary wheel body 5 is adjusted to the ideal height position, the user releases the pull plate 10.

[0031] The compressed spring 12 releases its elastic force, pushing the reset block 11 to reset downwards, which in turn causes the locking lever 9 to move downwards.

[0032] Under the action of spring force, the lower end of locking lever 9 will automatically engage with the other currently aligned locking slot 7 (e.g., Figure 4 As shown in the figure, the rotating shaft 3 and the support arm 4 are thus re-fixed at this new angle.

[0033] Effect achieved: Through the above operation, the user can easily adjust the ground contact sensitivity of the auxiliary wheel body 5 from "high" (i.e., the auxiliary wheel touches the ground as soon as the front wheel is slightly lifted) to "low" (i.e., the auxiliary wheel needs to be lifted at a higher angle before it touches the ground), which meets the stability and flexibility requirements in different usage scenarios (such as pushing on steep slopes, gentle slopes, and flat ground), effectively prevents the wheelchair from tipping over, and avoids unnecessary dragging of the auxiliary wheel body 5 on flat ground. Example

[0034] The difference from Embodiment 1 is that magnets 13 are fixedly installed on the top of both fixed plates 1, and two iron pieces 14 are fixedly installed on the bottom of the pull plate 10. The two magnets 13 attract the two iron pieces 14, increasing the stability of the pull plate 10.

[0035] The rest is the same as in Example 1.

[0036] The circuits, electronic components, and control modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0037] The above description is only a preferred embodiment of this practice, but the scope of protection of this embodiment is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in this embodiment, based on the technical solution and the inventive concept of this embodiment, should be covered within the scope of protection of this embodiment.

Claims

1. A wheelchair ramp assist wheel, characterized in that, include: Two fixing plates (1) are fixedly installed on the rear side of the wheelchair (16); Two rotating slots (2) are respectively located on one side of two fixed plates (1), and the same rotating shaft (3) is rotatably installed in the two rotating slots (2). Two support arms (4) are fixedly installed on the outside of the rotating shaft (3). The bottom ends of the two support arms (4) are equipped with auxiliary wheel bodies (5). The same connecting rod (6) is fixedly installed on the two support arms (4). Multiple locking grooves (7) are divided into two groups, and the two groups of locking grooves (7) are distributed in a ring at equal intervals on the outer sides of both ends of the rotating shaft (3); The locking mechanism is located on two fixed plates (1) and is used to fix the rotating shaft (3) in conjunction with the locking groove (7).

2. The wheelchair ramp auxiliary wheel according to claim 1, characterized in that, The locking mechanism includes two locking rods (9), which are respectively engaged with two locking slots (7).

3. The wheelchair ramp auxiliary wheel according to claim 2, characterized in that, The top of each of the two fixed plates (1) is provided with a vertical hole (8), and the two vertical holes (8) are respectively connected to the two rotating slots (2). The two locking rods (9) are respectively slidably installed in the two vertical holes (8).

4. The wheelchair ramp auxiliary wheel according to claim 3, characterized in that, The inner walls of the two vertical holes (8) are provided with reset grooves (15), and reset blocks (11) are slidably installed in the two reset grooves (15). The two reset blocks (11) are fixedly connected to the two locking rods (9) respectively.

5. The wheelchair ramp assist wheel according to claim 4, characterized in that, One end of a spring (12) is fixedly installed on the top of each of the two reset blocks (11), and the other end of the spring (12) is fixedly connected to the top inner wall of the reset groove (15).

6. The wheelchair ramp assist wheel according to claim 5, characterized in that, The top of the two locking rods (9) is fixedly mounted with the same pull plate (10), which is located above the two fixed plates (1).

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