Electric wheelchair platform passing device

Abstract

The utility model discloses a platform passing device for an electric wheelchair, which belongs to the technical field of mechanical design and manufacture and comprises a power mechanism, an eccentric wheel mainboard component and a rolling component. The power output end of the power mechanism is connected with the eccentric wheel main plate assembly, and the eccentric wheel main plate assembly is provided with an installation position used for installing the rolling assembly. The rolling assembly is mounted on the eccentric wheel mainboard assembly through the mounting position, and the rolling assembly can run in a rolling manner; the whole structure of the wheelchair ridge crossing device is composed of the power mechanism, the eccentric wheel main board assembly and the rolling assembly, compared with an existing wheelchair ridge crossing device related to complex mechanical transmission and a hydraulic or pneumatic system in the market, the wheelchair ridge crossing device has the advantages that the number of parts is small, no complex system exists, the failure rate of the device is reduced, and the maintenance difficulty is correspondingly reduced; the structure is simple, and high cost caused by complex mechanical transmission and hydraulic or pneumatic systems is avoided.

Description

Technical Field

[0001] This utility model relates to the field of mechanical design and manufacturing technology, and relates to an electric wheelchair crossing device. Background Technology

[0002] With societal development, greater emphasis is being placed on caring for people with disabilities and mobility impairments. Wheelchairs, as a crucial tool for their daily mobility, directly impact their quality of life. Currently, wheelchairs have significant limitations in overcoming obstacles, causing considerable inconvenience for users.

[0003] In daily life, wheelchair users frequently encounter various road obstacles, such as curbs between sidewalks and roads, speed bumps in residential areas, and thresholds at building entrances. Ordinary wheelchairs have a relatively simple design, with small wheels and a lack of effective obstacle-crossing mechanisms, making it difficult for them to navigate these obstacles smoothly. Users may need assistance to lift the wheelchair or repeatedly try and adjust the angle themselves. This process is not only physically demanding but also prone to causing instability and posing significant safety hazards.

[0004] To address the issue of wheelchairs navigating obstacles, several wheelchair obstacle-crossing devices have been introduced to the market. However, these devices generally suffer from complex structures, consisting of numerous components and involving intricate mechanical transmission, hydraulic, or pneumatic systems. This not only increases the failure rate and makes maintenance difficult but also requires users to possess certain operating skills and knowledge. More importantly, the complex structure significantly increases costs, resulting in high purchase prices that represent a considerable expense for ordinary families, severely limiting their widespread adoption.

[0005] Therefore, it is urgent to develop a wheelchair obstacle crossing technology that is simple in structure, reasonably priced, and easy for ordinary people to use. Utility Model Content

[0006] To achieve the above objectives, this utility model provides the following technical solution: an electric wheelchair platform crossing device, comprising a power mechanism, an eccentric wheel main board assembly, and a rolling assembly;

[0007] The power output end of the power mechanism is connected to the eccentric wheel main board assembly.

[0008] The eccentric wheel main board assembly is provided with a mounting position for mounting the rolling assembly;

[0009] The rolling component is mounted on the eccentric wheel mainboard component via the mounting position, and the rolling component can operate in a rolling manner.

[0010] Preferably, the power mechanism is a bidirectional dual-head motor, and the output shafts at both ends of the bidirectional dual-head motor are respectively connected to an eccentric wheel main board assembly, and the connection is achieved through a shaft seat.

[0011] Preferably, the eccentric wheel main board assembly is a lever eccentric wheel main board, which is integrally formed from a curved part and a rectangular part. The bottom end of the curved part and the bottom end of the rectangular part are on the same straight line, and the part where the curved part and the inner side of the rectangular part are connected is an arc surface.

[0012] Preferably, the curved portion of the lever eccentric wheel main board has a plurality of roller mounting holes evenly distributed as mounting positions, and the rolling assembly consists of a plurality of rollers.

[0013] Preferably, the roller is mounted on the roller mounting hole via a mounting shaft, and rollers are mounted on both ends of the mounting shaft. The rollers are equipped with bearings and are connected to the mounting shaft via the bearings.

[0014] Preferably, the rectangular portion of the lever eccentric wheel main board is provided with a bearing mounting hole, which is adapted to be used with a bidirectional dual-head motor, so as to realize the connection between the bidirectional dual-head motor and the lever eccentric wheel main board through the bearing.

[0015] Preferably, the roller mounting holes are evenly distributed on the curved part of the lever eccentric wheel main board, and the distance between any two adjacent roller mounting holes is such that the distance between the two adjacent rollers after installation is in the range of 2mm-3mm.

[0016] Preferably, the step-over device is used for electric wheelchairs, and the step-over device is provided at both the front and rear ends of the electric wheelchair. The eccentric wheel main board assembly is driven by a power mechanism to drive the rolling assembly to rotate, thereby assisting the electric wheelchair in crossing obstacles.

[0017] Preferably, the center points of the plurality of roller mounting holes are on the same curved line.

[0018] Beneficial effects: Compared with the prior art, the overall structure of this utility model consists of a power mechanism, an eccentric wheel main board assembly and a rolling assembly. Compared with the existing wheelchair obstacle crossing equipment on the market that involves complex mechanical transmission, hydraulic or pneumatic systems, it has fewer parts and no complex system, which reduces the failure rate of the equipment and reduces the difficulty of maintenance accordingly.

[0019] With its simple structure and lack of complex mechanical transmission, hydraulic or pneumatic systems that result in high costs, the cost of this platform device is relatively reasonable and will not place an excessive economic burden on ordinary families. This facilitates its widespread adoption and meets the needs of more people with disabilities and those with mobility impairments.

[0020] The ramp device is installed at the front and rear of the electric wheelchair. The eccentric wheel main board assembly is driven by the power mechanism to drive the rolling assembly. The rollers of the rolling assembly can provide effective rolling assistance when encountering obstacles, helping the electric wheelchair to cross various road obstacles such as curbs between sidewalks and roads, speed bumps on community roads, and thresholds at building entrances and exits more smoothly. This improves the mobility of the mobile device, enhances the user's quality of life, and also reduces safety hazards such as instability that may be caused by difficulty in crossing obstacles. Attached Figure Description

[0021] Figure 1 This is a perspective view of the eccentric wheel main board assembly and the rolling assembly of this utility model.

[0022] Figure 2 This is a side view of the eccentric wheel main board assembly and the rolling assembly of this utility model.

[0023] Figure 3 This is a structural diagram of the eccentric wheel main board assembly of this utility model.

[0024] Figure 4 This is a schematic diagram of the front view of the structure of this utility model.

[0025] In the attached diagram: 1-power mechanism, 2-eccentric wheel main board assembly, 201-bent part, 202-rectangular part, 203-arc surface, 204-roller mounting hole, 205-shaft mounting hole, 3-rolling assembly, 4-mounting shaft. Detailed Implementation

[0026] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0027] Example

[0028] Please refer to the accompanying drawings in the specification. In this embodiment of the utility model, an electric wheelchair crossing device includes a power mechanism 1, an eccentric wheel main board assembly 2, and a rolling assembly 3.

[0029] The power output end of the power mechanism 1 is connected to the eccentric wheel main board assembly 2.

[0030] The eccentric wheel main board assembly 2 is provided with a mounting position for mounting the rolling assembly 3;

[0031] The rolling component 3 is mounted on the eccentric wheel main board component 2 via the mounting position, and the rolling component 3 can operate in a rolling manner.

[0032] Furthermore, the power mechanism 1 is a bidirectional dual-head motor, and the output shafts at both ends of the bidirectional dual-head motor are respectively connected to the eccentric wheel main board assembly 2, and the connection is achieved through the bearing seat.

[0033] Furthermore, the eccentric wheel main board assembly 2 is a lever eccentric wheel main board, which is integrally formed by a curved part 201 and a rectangular part 202. The bottom end of the curved part 201 and the bottom end of the rectangular part 202 are on the same straight line, and the part where the curved part 201 and the inner side of the rectangular part 202 are connected is an arc surface 203.

[0034] Furthermore, the curved portion 201 of the lever eccentric wheel main board has a plurality of roller mounting holes 204 evenly distributed as mounting positions, and the rolling assembly 3 consists of a plurality of rollers.

[0035] Furthermore, the roller is mounted on the roller mounting hole 204 via the mounting shaft 4, and rollers are mounted on both ends of the mounting shaft 4. The rollers are equipped with bearings and are connected to the mounting shaft 4 via the bearings.

[0036] Furthermore, the rectangular portion 202 of the lever eccentric wheel main board is provided with a bearing mounting hole 205, which is adapted to be used with a bidirectional dual-head motor to realize the connection between the bidirectional dual-head motor and the lever eccentric wheel main board through the bearing.

[0037] Furthermore, the roller mounting holes 204 are evenly distributed on the curved portion 201 of the lever eccentric wheel main board, and the distance between any two adjacent roller mounting holes 204 is such that the distance between the two adjacent rollers after installation is in the range of 2mm-3mm.

[0038] Furthermore, the aforementioned obstacle-crossing device is used for electric wheelchairs. The power mechanism 1 drives the eccentric wheel main board assembly 2, which in turn drives the rolling assembly 3 to assist the electric wheelchair in crossing obstacles. It is installed at the front and rear wheels of the electric wheelchair. Specifically, the obstacle-crossing device is installed 150mm behind the center of the front wheels and 150mm behind the center of the rear wheels, respectively. This ensures that when the eccentric wheel rotates and raises the front and rear wheels one by one, it does not interfere with the obstacle. Both sets of installed devices must ensure that after the eccentric lever wheel is reset, the distance from the ground is not less than 50mm, allowing the electric wheelchair to move normally on flat ground. The power mechanism is fixed to the wheelchair.

[0039] The output power of the bidirectional dual-head motor on the front wheel of an electric wheelchair is less than that of the bidirectional dual-head motor on the rear wheel of an electric wheelchair.

[0040] The center points of the multiple roller mounting holes 204 are on the same curved line.

[0041] Working Principle: When an electric wheelchair encounters a step (or ledge) and the front wheels become stuck, the ledge-crossing device installed at the front wheels activates. The output motor in this device drives a rotating lever eccentric wheel main plate, causing the small rolling wheels around the main plate to rotate. The main plate rises due to this eccentric rotation. During this rising and rotating process, the device generates an upward and forward thrust on the front wheels, keeping them close to the step (or ledge). Once the required height of a few millimeters is reached to cross the step (or ledge), the power wheels of the electric wheelchair are activated, allowing it to move forward. Simultaneously, the device has a reverse reset mechanism to ensure the electric wheelchair can move forward normally after crossing the step (or ledge).

[0042] When the rear wheels approach the platform (step), the step-over device at the rear wheels starts to rotate. Similarly, when the height of the step (step) is a few millimeters, the power wheels (rear wheels) of the electric wheelchair continue to drive the wheelchair forward to cross the platform (step), and the device will also reverse and reset, thus realizing the entire operation process of the electric wheelchair crossing the platform (step).

[0043] It is worth noting that an electric wheelchair needs to be equipped with two such devices, one installed at the front wheel and the other at the rear wheel. Because the load on the front wheel is small, the power of the dual-axis output motor installed at the front wheel is relatively small; while the load on the rear wheel is large, so the power of the dual-axis output motor installed at the rear wheel is larger.

[0044] This device enables electric wheelchairs to traverse steps up to 150mm in height.

[0045] In summary, the overall structure of this utility model consists of a power mechanism, an eccentric wheel main board assembly, and a rolling assembly. Compared with existing wheelchair obstacle-crossing devices on the market that involve complex mechanical transmission, hydraulic, or pneumatic systems, it has fewer parts and no complex systems, reducing the failure rate and maintenance difficulty. Its simple structure and lack of high costs associated with complex mechanical transmission, hydraulic, or pneumatic systems make the cost of this obstacle-crossing device relatively reasonable, avoiding excessive financial burden on ordinary families and facilitating its widespread adoption to meet the needs of more disabled and mobility-impaired individuals. The obstacle-crossing device is installed at the front and rear of the electric wheelchair. The power mechanism drives the eccentric wheel main board assembly to rotate the rolling assembly. The rollers of the rolling assembly provide effective rolling assistance when encountering obstacles, helping the electric wheelchair to more smoothly cross various road obstacles such as curbs between sidewalks and roads, speed bumps in residential areas, and thresholds at building entrances. This improves the mobility of the device, enhances the user's quality of life, and reduces safety hazards such as instability caused by difficulty in crossing obstacles.

[0046] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these should also be considered within the scope of protection of this utility model. These will not affect the implementation effect of this utility model or the practicality of the patent.

Claims

1. An electric wheelchair transfer device, characterized in that: It includes a power mechanism (1), an eccentric wheel main board assembly (2), and a rolling assembly (3); The power output end of the power mechanism (1) is connected to the eccentric wheel main board assembly (2). The eccentric wheel main board assembly (2) is provided with a mounting position for mounting the rolling assembly (3); The rolling component (3) is mounted on the eccentric wheel main board component (2) through the mounting position, and the rolling component (3) is capable of rolling.

2. The electric wheelchair ramp device according to claim 1, characterized in that: The power mechanism (1) is a bidirectional double-headed motor. The output shafts at both ends of the bidirectional double-headed motor are respectively connected to the eccentric wheel main board assembly (2) and are connected through the bearing seat.

3. The electric wheelchair ramp device according to claim 2, characterized in that: The eccentric wheel main board assembly (2) is a lever eccentric wheel main board. The lever eccentric wheel main board is integrally formed by a curved part (201) and a rectangular part (202). The bottom end of the curved part (201) and the bottom end of the rectangular part (202) are on the same straight line. The part where the curved part (201) and the inner side of the rectangular part (202) are connected is an arc surface (203).

4. The electric wheelchair ramp device according to claim 3, characterized in that: The curved portion (201) of the lever eccentric wheel main board has a plurality of roller mounting holes (204) evenly distributed as mounting positions, and the rolling assembly (3) consists of a plurality of rollers.

5. The electric wheelchair transfer device according to claim 4, characterized in that: The roller is mounted on the roller mounting hole (204) via the mounting shaft (4), and rollers are mounted on both ends of the mounting shaft (4). The rollers are equipped with bearings and are connected to the mounting shaft (4) via the bearings.

6. The electric wheelchair ramp device according to claim 3, characterized in that: The rectangular portion (202) of the lever eccentric wheel main board is provided with a bearing mounting hole (205), which is adapted to be used with a bidirectional dual-head motor so as to realize the connection between the bidirectional dual-head motor and the lever eccentric wheel main board through the bearing.

7. The electric wheelchair transfer device according to claim 4, characterized in that: The roller mounting holes (204) are evenly distributed on the curved part (201) of the lever eccentric wheel main board, and the distance between any two adjacent roller mounting holes (204) is such that the distance between the two adjacent rollers after installation is in the range of 2mm-3mm.

8. The electric wheelchair transfer device according to claim 1, characterized in that: The step-over device is used for electric wheelchairs. The electric wheelchair is equipped with the step-over device at both the front and rear ends. The eccentric wheel main board assembly (2) is driven by the power mechanism (1) to drive the rolling assembly (3) to rotate, so as to assist the electric wheelchair in crossing obstacles.

9. The electric wheelchair transfer device according to claim 4, characterized in that: The center points of the multiple roller mounting holes (204) are on the same curved line.

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