Disabled assisting wheelchair with obstacle crossing assisting structure

Abstract

The utility model discloses a disabled helping wheelchair with an auxiliary obstacle crossing structure, which comprises a wheelchair main body, a rotating bearing wheel is arranged below one end of the wheelchair main body, an obstacle crossing mechanism is arranged on the lower surface of one end of the wheelchair main body far away from the bearing wheel, and the wheelchair main body can easily cross an obstacle in an upturning mode. According to the disabled assisting wheelchair with the obstacle crossing assisting structure, the mode that the guide wheels rotate and turn upwards towards the two sides when encountering an obstacle is adopted, so that the front end of the wheelchair body can easily cross the high obstacle, and then the wheelchair can stably make contact with the ground in the mode that the guide wheels are turned downwards and reset after crossing the obstacle; the situation that the gravity center of the wheelchair body is unstable when the bearing wheels cross an obstacle is avoided, by means of the mode that the obstacle crossing wheels make contact with the ground in front of the obstacle before the guide wheels are turned upwards, the wheelchair body can keep relatively stable when the guide wheels are disengaged from the ground, and the wheelchair body cannot shake when pushed.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchairs for assisting the disabled, in particular to a wheelchair for assisting the disabled provided with an auxiliary obstacle-crossing structure. Background Art

[0002] In today's society, the quality of life and mobility of people with disabilities are receiving increasing attention. Wheelchairs, as important mobility aids for people with disabilities, are crucial for improving their ability to move independently and participate in social life. However, traditional wheelchairs have exposed many significant limitations and shortcomings when facing complex environments and various obstacles. For a long time, most common wheelchairs on the market have only been suitable for flat and barrier-free roads. Once they encounter thresholds, stairs, uneven slopes, raised stones, or other forms of obstacles, people with disabilities often become trapped and find it difficult to move forward alone. This situation not only greatly limits their range of movement, but also makes them highly dependent on others for assistance in their daily lives, seriously affecting their independence and autonomy. A closer look at our living environment shows that although many public places have made efforts to build barrier-free passages to provide convenience, it is impossible to completely eliminate all potential obstacles. For example, some shopping mall entrances may have slightly high thresholds, hospital corridors may have slight slopes, and school campuses may have unpaved brick roads. For people with disabilities, these seemingly small obstacles may become insurmountable gaps. The design of some obstacle-crossing wheelchairs focuses on the obstacle-crossing function, but ignores stability and safety. During the obstacle-crossing process, the wheelchair is prone to dangerous situations such as imbalance and tipping over, posing potential physical injury risks to the user. At the same time, the adaptability of existing obstacle-crossing wheelchairs to obstacles of different types, heights and shapes is often limited. Utility Model Content

[0003] The purpose of the present utility model is to provide a wheelchair for assisting the disabled with an auxiliary obstacle-crossing structure, so as to solve the problem of poor obstacle-crossing function of the wheelchair for assisting the disabled proposed in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present utility model provides the following technical solution: a wheelchair for the disabled with an auxiliary obstacle-crossing structure, comprising a wheelchair body, a rotating load-bearing wheel installed under one end of the wheelchair body, and an obstacle-crossing mechanism provided on the lower surface of the end of the wheelchair body away from the load-bearing wheel, which enables the wheelchair body to easily cross obstacles by flipping up.

[0005] Preferably, the obstacle crossing mechanism includes: a connecting rod, which is fixedly arranged on the lower surface of one end of the wheelchair body away from the load-bearing wheel, and a mounting seat is fixedly arranged on the lower end of the connecting rod, a switching motor is fixedly installed inside the mounting seat, and one end of the output shaft of the switching motor is fixedly connected to a mounting plate, the lower end of the mounting plate is fixedly connected to the mounting rod, and a rotating guide wheel is installed on the lower end of the mounting rod, a locking electric push rod is fixedly installed on the lower end of the connecting rod, and one end of the locking electric push rod is fixedly connected to a limiting frame, and a limiting groove is provided on the upper side surface of the mounting plate.

[0006] By adopting the above technical solution, the front end of the wheelchair body can quickly cross obstacles.

[0007] Preferably, the mounting rod and the connecting rod are coaxially arranged, and the mounting plate is mounted by engaging with the limiting frame through a limiting groove.

[0008] By adopting the above technical solution, the limiting frame can limit the mounting plate to prevent the mounting plate from rotating at will.

[0009] Preferably, a rotating footrest is installed on the lower surface of the wheelchair body, and a sliding locking frame is installed on the lower surface of the wheelchair body, and the outer surfaces of both ends of the locking frame are provided with card slots, the locking frame is connected to the footrest through the card slots, and a spring is connected between the locking frame and the wheelchair body.

[0010] By adopting the above technical solution, the locking frame can provide limited support for the footrest.

[0011] Preferably, a support mechanism is installed on the lower surface of the wheelchair body, and the support mechanism stabilizes the wheelchair body during the obstacle traversal process.

[0012] By adopting the above technical solution, the wheelchair body will not shake during the obstacle crossing process.

[0013] Preferably, the supporting mechanism includes: a center frame, which is rotatably mounted on the lower surface of the wheelchair body, and a rotatable obstacle-crossing wheel is mounted on the lower end of the center frame, and a support plate is fixedly connected between the upper side surfaces of the two center frames, a supporting electric push rod is rotatably mounted on the lower surface of the wheelchair body, and one end of the supporting electric push rod is rotatably connected to a connecting block, and a battery pack is arranged inside the lower surface of the wheelchair body.

[0014] By adopting the above technical solution, the center frame can contact the ground through the obstacle-crossing wheels, so that the wheelchair body remains stable when crossing obstacles.

[0015] Preferably, the supporting electric push rod is located between the two center racks, the connecting block is T-shaped, a sliding groove is provided in the middle of the upper surface of the supporting plate, and the supporting plate is slidably connected to the connecting block through the sliding groove.

[0016] By adopting the above technical solution, the supporting electric push rod can maintain connection with the support plate through the connecting block during the process of driving the support plate to rotate.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the wheelchair with the auxiliary obstacle-crossing structure:

[0018] 1. The guide wheels rotate to both sides and flip up when encountering an obstacle, allowing the front end of the wheelchair to easily cross higher obstacles. After crossing the obstacle, the guide wheels flip down and reset, allowing the wheelchair to maintain stable contact with the ground, preventing the load-bearing wheels from causing the center of gravity of the wheelchair to be unstable when crossing the obstacle;

[0019] 2. Furthermore, by turning the front obstacle-crossing wheel over the guide wheel and contacting the ground in front of the obstacle, the wheelchair body can remain relatively stable when the guide wheel is out of contact with the ground, so that the wheelchair body will not shake when being pushed;

[0020] 3. Furthermore, when overcoming obstacles, the footrest is retracted and engaged with the locking frame, so that the footrest will not affect the passability of the wheelchair body during the obstacle overcoming process, thereby ensuring the stability of the wheelchair body during the obstacle overcoming process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the center frame, obstacle-crossing wheels and support plates connected in the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the overall cross-section of the utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the connecting rod, mounting base and switching motor connection section of the utility model;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the footrest, locking frame and card slot connection of the utility model;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the utility model in its overall working state.

[0027] In the figure: 1. Wheelchair body; 2. Load-bearing wheels; 3. Connecting rod; 4. Mounting seat; 5. Switching motor; 6. Mounting plate; 7. Mounting rod; 8. Guide wheel; 9. Locking electric push rod; 10. Limiting frame; 11. Limiting slot; 12. Footrest; 13. Locking frame; 14. Card slot; 15. Center frame; 16. Obstacle-crossing wheel; 17. Support plate; 18. Support electric push rod; 19. Connecting block. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-6 The utility model provides a technical solution: a wheelchair for the disabled with an auxiliary obstacle-crossing structure.

[0030] Example 1

[0031] This embodiment discloses: a wheelchair body 1, a rotating load-bearing wheel 2 is installed below one end of the wheelchair body 1, and an obstacle crossing mechanism is provided on the lower surface of the end of the wheelchair body 1 away from the load-bearing wheel 2, which enables the wheelchair body 1 to easily cross obstacles by flipping upward;

[0032] The obstacle crossing mechanism includes: a connecting rod 3, which is fixedly arranged on the lower surface of the end of the wheelchair body 1 away from the load-bearing wheel 2, and a mounting seat 4 is fixedly arranged on the lower end of the connecting rod 3, a switching motor 5 is fixedly installed inside the mounting seat 4, and one end of the output shaft of the switching motor 5 is fixedly connected to a mounting plate 6, the lower end of the mounting plate 6 is fixedly connected to a mounting rod 7, and a rotating guide wheel 8 is installed on the lower end of the mounting rod 7, a locking electric push rod 9 is fixedly installed on the lower end of the connecting rod 3, and one end of the locking electric push rod 9 is fixedly connected to a limiting frame 10, and a limiting groove 11 is provided on the upper side surface of the mounting plate 6;

[0033] The mounting rod 7 is coaxially arranged with the connecting rod 3, and the mounting plate 6 is mounted by engaging with the limiting frame 10 through the limiting groove 11;

[0034] During the obstacle surmounting process, the switching motor 5 and the locking electric push rod 9 are controlled by the external remote control device. At this time, the locking electric push rod 9 drives the limit frame 10 to slide out of the engagement with the limit groove 11, and then the switching motor 5 in the mounting seat 4 at the lower end of the connecting rod 3 is started to drive the mounting plate 6 and the mounting rod 7 to flip outward. At this time, the mounting rod 7 drives the guide wheel 8 to flip out of the connection with the ground, so that the front end of the wheelchair body 1 can move under the support of the load-bearing wheels 2 and pass the obstacle smoothly.

[0035] Example 2

[0036] This embodiment is based on the first embodiment. A rotatable footrest 12 is mounted on the lower surface of the wheelchair body 1. A sliding locking frame 13 is mounted on the lower surface of the wheelchair body 1. Slots 14 are formed on the outer surfaces of both ends of the locking frame 13. The locking frame 13 is engaged with the footrest 12 via the slots 14. A spring is connected between the locking frame 13 and the wheelchair body 1.

[0037] Before crossing the obstacle, the locking frame 13 is slid to disengage the slot 14 from the upper end of the footrest 12, and then the footrest 12 is rotated so that the footrest 12 is retracted under the wheelchair body 1 and the locking frame 13 is released. The locking frame 13 slides under the support of the spring between the wheelchair body 1 and engages with the footrest 12 through the slot 14 on the other side to limit the position, so that the wheelchair body 1 can smoothly cross the obstacle.

[0038] Example 3

[0039] This embodiment is based on the first and second embodiments. The lower surface of the wheelchair body 1 is provided with a support mechanism, which stabilizes the wheelchair body 1 during the obstacle crossing process.

[0040] The support mechanism includes: a center frame 15, which is rotatably mounted on the lower surface of the wheelchair body 1, and a rotatable obstacle-crossing wheel 16 is mounted on the lower end of the center frame 15, and a support plate 17 is fixedly connected between the upper side surfaces of the two center frames 15. A supporting electric push rod 18 is rotatably mounted on the lower surface of the wheelchair body 1, and one end of the supporting electric push rod 18 is rotatably connected to a connecting block 19. A battery pack is provided inside the lower surface of the wheelchair body 1;

[0041] The supporting electric push rod 18 is located between the two middle racks 15. The connecting block 19 is T-shaped. A sliding groove is provided in the middle of the upper surface of the supporting plate 17, and the supporting plate 17 is slidably connected to the connecting block 19 through the sliding groove.

[0042] Before overcoming an obstacle, the supporting electric push rod 18 is started, which drives the connecting block 19 to squeeze the supporting plate 17, and the middle frame 15 on both sides of the supporting plate 17 is driven to rotate downward until the obstacle-crossing wheel 16 at the lower end of the middle frame 15 contacts the ground, ensuring the stability of the wheelchair body 1 after the guide wheel 8 flips up;

[0043] When the guide wheel 8 has completely passed the obstacle, the guide wheel 8 is driven to flip down and contact the ground, and then the obstacle-crossing wheel 16 is retracted. At this time, the wheelchair body 1 is pushed to move so that the obstacle-crossing wheel 16 passes the obstacle. Then, the obstacle-crossing wheel 16 is driven to contact the ground through the supporting electric push rod 18 and lift the end of the wheelchair body 1 equipped with the load-bearing wheel 2 off the ground. At this time, the wheelchair body 1 is pushed until the load-bearing wheel 2 completely passes the obstacle. Then the obstacle-crossing wheel 16 is retracted so that the load-bearing wheel 2 contacts the ground. At this time, the sliding locking frame 13 releases the footrest 12 to achieve the purpose of resetting the wheelchair body 1 as a whole.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wheelchair for assisting the disabled with an obstacle-crossing assisting structure, comprising a wheelchair body (1), wherein a rotating load-bearing wheel (2) is mounted below one end of the wheelchair body (1), and characterized in that: An obstacle crossing mechanism is provided on the lower surface of one end of the wheelchair body (1) away from the load-bearing wheel (2), so that the wheelchair body (1) can easily cross obstacles by flipping upward; The obstacle crossing mechanism comprises: a connecting rod (3), the connecting rod (3) being fixedly arranged on the lower surface of one end of the wheelchair body (1) away from the load-bearing wheel (2), and a mounting seat (4) being fixedly arranged at the lower end of the connecting rod (3), a switching motor (5) being fixedly installed inside the mounting seat (4), and one end of the output shaft of the switching motor (5) being fixedly connected to a mounting plate (6), the lower end of the mounting plate (6) being fixedly connected to a mounting rod (7), and a rotating guide wheel (8) being installed at the lower end of the mounting rod (7), a locking electric push rod (9) being fixedly installed at the lower end of the connecting rod (3), and one end of the locking electric push rod (9) being fixedly connected to a limiting frame (10), and a limiting groove (11) being provided on the upper side surface of the mounting plate (6).

2. The wheelchair with an auxiliary obstacle-crossing structure according to claim 1, characterized in that: The installation rod (7) and the connecting rod (3) are coaxially arranged, and the installation plate (6) is mounted by engaging with the limiting frame (10) through the limiting groove (11).

3. The wheelchair with an auxiliary obstacle-crossing structure according to claim 2, characterized in that: A rotating footrest (12) is installed on the lower surface of the wheelchair body (1), and a sliding locking frame (13) is installed on the lower surface of the wheelchair body (1), and the outer surfaces of both ends of the locking frame (13) are provided with card slots (14), the locking frame (13) is connected to the footrest (12) through the card slots (14), and a spring is connected between the locking frame (13) and the wheelchair body (1).

4. The wheelchair with an auxiliary obstacle-crossing structure according to claim 3, characterized in that: A support mechanism is installed on the lower surface of the wheelchair body (1), and the support mechanism plays a stabilizing role for the wheelchair body (1) during the obstacle crossing process.

5. The wheelchair with an auxiliary obstacle-crossing structure according to claim 4, characterized in that: The support mechanism comprises: a center frame (15), the center frame (15) is rotatably mounted on the lower surface of the wheelchair body (1), and a rotatable obstacle-crossing wheel (16) is mounted on the lower end of the center frame (15), and a support plate (17) is fixedly connected between the upper side surfaces of the two center frames (15), a supporting electric push rod (18) is rotatably mounted on the lower surface of the wheelchair body (1), and one end of the supporting electric push rod (18) is rotatably connected to a connecting block (19), and a battery pack is arranged inside the lower surface of the wheelchair body (1).

6. The wheelchair with an auxiliary obstacle-crossing structure according to claim 5, characterized in that: The supporting electric push rod (18) is located between the two middle racks (15), the connecting block (19) is of T-shaped design, a sliding groove is provided in the middle of the upper surface of the supporting plate (17), and the supporting plate (17) is slidably connected to the connecting block (19) through the sliding groove.

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