Electric wheelchair used for walking up and down stairs autonomously

Abstract

The utility model discloses an electric wheelchair for walking up and down stairs autonomously. The electric wheelchair comprises a seat for a user to sit, a frame for mounting the seat and a planet wheel mechanism for driving the wheelchair to advance and walk up and down stairs, the planet wheel mechanism comprises a planet wheel carrier and planet wheel small wheels arranged on the planet wheel carrier, and the planet wheel small wheels are symmetrically arranged on the two sides of the frame and arranged below the frame through a main shaft. One side of the bottom of the seat is rotationally connected with the frame; a linear telescopic assembly is arranged on the other side of the bottom of the seat; the linear telescopic assembly is used for adjusting the tipping angle of the seat.

Description

Technical Field

[0001] The utility model relates to the field of electric wheelchairs, in particular to an electric wheelchair for autonomously going up and down stairs. Background Art

[0002] With the development of society, the disabled and the elderly have an increasingly strong demand for intelligent wheelchairs, and have also put forward higher requirements for the performance of wheelchairs.

[0003] Although the current ordinary wheelchairs can expand their range of activities. But when climbing stairs, it often requires multiple normal people to lift the wheelchair user downstairs or upstairs. However, patients using wheelchairs cannot ensure that there are normal people to help them go up and down the stairs at all times, which invisibly restricts their travel and causes inconvenience for disabled people and the elderly. Therefore, disabled people and the elderly need wheelchairs with autonomous stair climbing to change the existing wheelchairs so that they can travel independently. Summary of the invention

[0004] In view of the above technical problems, the utility model provides an electric wheelchair for autonomously going up and down stairs. Power rollers that can revolve and rotate are arranged, and the staggered rotation of multiple rollers is utilized to drive the wheelchair up and down stairs. In addition, a lifting connecting rod is utilized to drive the seat to tilt forward and backward, thereby balancing the center of gravity of the passenger.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical means:

[0006] An electric wheelchair for autonomously ascending and descending stairs comprises a seat for a user to sit on, a frame for mounting the seat, and a planetary gear mechanism for driving the wheelchair forward and ascending and descending stairs; the planetary gear mechanism comprises a planetary gear frame and planetary gear pinions arranged on the planetary gear frame, the planetary gear pinions are symmetrically arranged on both sides of the frame, and are arranged below the frame through a main shaft;

[0007] One side of the seat bottom is rotatably connected to the frame via a rotation pin;

[0008] A linear telescopic assembly is arranged on the other side of the seat bottom; the linear telescopic assembly is used to control the seat to rotate around the rotating pin to adjust the tilt angle of the seat.

[0009] The linear telescopic assembly comprises: a support plate and a lifting connecting rod;

[0010] The support plate is arranged below the seat;

[0011] The lifting link is arranged between the seat and the support plate, and is used to adjust the height of one side of the seat to keep it level with the ground when going up and down stairs.

[0012] A spring for reducing the vibration of the seat is also arranged inside the linear telescopic assembly.

[0013] Also includes:

[0014] The supporting roller mechanism is arranged at the rear of the frame and is used for supporting the frame when the frame is climbing.

[0015] The supporting roller mechanism comprises: a supporting rod and a supporting roller;

[0016] One end of the support rod is hinged to the frame, and the other end fixes the support roller; the support rod is used to drive the support roller to rise and fall.

[0017] Also includes:

[0018] The handles are symmetrically arranged on both sides of the seat, and are used to assist the user in grasping to ensure that the user is firmly fixed in the seat.

[0019] Beneficial effects:

[0020] 1. The utility model replaces the original single roller with a plurality of power rollers, and the power rollers can revolve and rotate around the power shaft of the seat and its own central axis; thereby, the utility model utilizes the staggered rotation between the plurality of rollers to drive the wheelchair to climb the stairs and complete the action of going up and down the stairs.

[0021] 2. The utility model utilizes a lifting connecting rod to drive the seat to tilt forward and backward, thereby balancing the center of gravity of the passenger; therefore, the utility model can solve the problem that the passenger is prone to slip out of the seat due to the tilted angle when going up and down the stairs; at the same time, the lifting connecting rod can be used as a shock absorbing mechanism to alleviate the vibration generated by the alternating rotation of multiple power rollers, thereby improving the passenger's user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the electric wheelchair of the utility model;

[0023] Figure 2 It is a side view of the electric wheelchair of the utility model;

[0024] Figure 3 It is a rear view of the electric wheelchair of the utility model.

[0025] In the figure: 1. seat; 2. left handle; 3. right handle; 4. linear telescopic assembly; 401. support plate; 402. lifting connecting rod; 5. motor mechanism; 6. main shaft; 7. planetary gear mechanism; 701. planetary gear pinion A; 702. planetary gear pinion B; 703. planetary gear pinion C; 8. foot pedal; 9. frame; 10. supporting roller mechanism. DETAILED DESCRIPTION

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] The utility model is a structural schematic diagram of an electric wheelchair for autonomously going up and down stairs. Figure 1-3 shown.

[0028] An electric wheelchair for autonomously going up and down stairs comprises a seat 1 for a user to sit on, a frame 9 for mounting the seat 1 and a planetary gear mechanism 7 for driving the wheelchair forward and going up and down stairs; the planetary gear mechanism 7 comprises a planetary gear frame and planetary gear pinions arranged on the planetary gear frame, the planetary gear pinions are symmetrically arranged on both sides of the frame 9 and are arranged below the frame 9 through a main shaft 6; one side of the bottom of the seat 1 is rotationally connected to the frame 9; a linear telescopic assembly 4 is arranged on the other side of the bottom of the seat 1; the linear telescopic assembly 4 is used to adjust the tilt angle of the seat 1; the planetary gear pinions rotate around the planetary gear mechanism 7 to drive the frame 9 to go up and down stairs; the planetary gear pinions rotate around their own central axis to drive the frame 9 forward.

[0029] The planetary gear mechanism 7 includes a main shaft 6, a planetary wheel A701, a planetary wheel B702 and a planetary wheel C703; the main shaft 6 is horizontally arranged at the bottom of the frame 9; the planetary wheels A701, the planetary wheels B702 and the planetary wheels C703 are arranged in a circular array around the central axis of the main shaft 6, and the planetary wheels A701, the planetary wheels B702 and the planetary wheels C703 are symmetrically arranged on both sides of the frame 9. Among them, the planetary gear mechanism 77 is connected to the internal driving component of the motor through a rotating shaft, and the planetary gear mechanisms 77 on both sides realize the rotation of different rollers under the switching of the climbing mode and the flat mode to meet the requirements of different travel situations. Among them, the planetary wheel A701, the planetary wheel B702 and the planetary wheel C703 on both sides rotate alternately in the stair climbing mode to achieve the purpose of climbing; in the flat ground mode, two of the planetary wheel A701, the planetary wheel B702 and the planetary wheel C703 on both sides contact the ground and roll around themselves to achieve the purpose of moving forward.

[0030] Furthermore, a motor mechanism 5 is also provided in the frame 9, and the motor mechanism 5 includes a plurality of driving motors provided at the main shaft 6, the planetary wheel A701, the planetary wheel B702 and the planetary wheel C703.

[0031] The linear telescopic assembly 4 includes: a support plate 401 and a lifting link 402; the support plate 401 is arranged below the seat 1; the lifting link 402 is arranged between the seat 1 and the support plate 401, and the lifting link 402 adjusts the height of one side of the seat 1 to keep it level with the ground when going up and down stairs, and is used to maintain the balance state of the seat 1 when going up and down stairs. In order to reduce the vibration effect of the wheelchair when going up and down stairs, a spring for reducing the vibration of the seat 1 is also arranged inside the linear telescopic assembly 4.

[0032] In order to further increase the comfort of people when using the device, a fixed waist belt and a fixed bolt can be used to prevent people from being injured due to emergency braking.

[0033] A support roller mechanism 10 is provided below the vehicle frame 9, which is used to support the vehicle frame 9 when climbing a slope. The support roller mechanism 10 includes a support rod and a support roller; the support rod has one end hinged to the vehicle frame 9 and the other end fixes the support roller; the support rod is used to drive the support roller to rise and fall.

[0034] There are symmetrically arranged handles on both sides of the seat 1, which are used to assist the user in grasping and ensure that the user is firmly fixed in the seat 1. The handles are divided into a left handle 2 and a right handle 3, which are respectively symmetrically installed on the outer top of the seat 1; wherein, a remote control handle is arranged on the right handle 3, which is used to control the planetary wheel to switch to different motion modes, specifically, stair climbing mode and ground level mode.

[0035] In order to facilitate the user's riding experience, a footrest 8 is provided on the seat 1 at the user's foot position.

[0036] Working principle:

[0037] First, the user sits on the seat 1 of the wheelchair and is fixed; when the user wants to move on the ground, the user switches the remote control handle on the right handle 3 to switch the wheelchair to the ground movement mode; at this time, the main shafts 6 on both sides of the wheelchair motor are fixed, and the supporting roller mechanism 10 falls to the ground, playing a supporting and driving role; the two planetary wheels tangent to the ground rotate, thereby driving the user to move forward; when the user wants to turn, the planetary wheels on the left and right sides rotate in opposite directions, thereby realizing the turning of the wheelchair.

[0038] When the user wants to go up the stairs, the remote control handle is switched to the stair climbing mode, at which time the lifting link 402 in the linear telescopic assembly 4 is extended to drive the seat 1 to tilt forward a certain angle, so that the user's overall center of gravity is deflected forward, and the user is level with the ground. Afterwards, the driving shafts of the three planetary wheels in the planetary gear mechanism 7 remain fixed, and the main shaft 6 starts to rotate, so that the three planetary wheels rotate alternately, that is, the user's stair climbing activity is realized.

[0039] When the user wants to go down the stairs, the remote control handle is switched to the downstairs mode. At this time, the lifting connecting rod 402 in the linear telescopic assembly 4 retracts to drive the seat 1 to recline at a certain angle, so that the user's overall center of gravity deflects backward and the user is level with the ground; after that, the driving shafts of the three planetary wheels in the planetary gear mechanism 7 remain fixed, and the main shaft 6 starts to rotate, causing the three planetary wheels to rotate alternately, thereby realizing the user's activity of going down the stairs.

Claims

1. An electric wheelchair for autonomously ascending and descending stairs, comprising a seat for a user to sit on, a frame for mounting the seat, and a planetary gear mechanism for driving the wheelchair forward and ascending and descending stairs; the planetary gear mechanism comprises a planetary gear frame and a planetary gear small wheel arranged on the planetary gear frame, the planetary gear small wheel is symmetrically arranged on both sides of the frame, and is arranged below the frame through a main shaft; Features: One side of the seat bottom is rotatably connected to the frame via a rotation pin; A linear telescopic assembly is arranged on the other side of the seat bottom; the linear telescopic assembly is used to control the seat to rotate around the rotating pin to adjust the tilt angle of the seat.

2. The electric wheelchair for autonomous stair climbing according to claim 1, characterized in that: The linear telescopic assembly comprises: a support plate and a lifting connecting rod; The support plate is arranged below the seat; The lifting link is arranged between the seat and the support plate, and is used to adjust the height of one side of the seat to keep it level with the ground when going up and down stairs.

3. The electric wheelchair for autonomous climbing and descending stairs according to claim 2, characterized in that: A spring for reducing the vibration of the seat is also arranged inside the linear telescopic assembly.

4. The electric wheelchair for autonomous stair climbing according to claim 1, characterized in that: Also includes: The supporting roller mechanism is arranged at the rear of the frame and is used for supporting the frame when the frame is climbing.

5. The electric wheelchair for autonomous stair climbing according to claim 4, characterized in that: The supporting roller mechanism comprises: a supporting rod and a supporting roller; One end of the support rod is hinged to the frame, and the other end fixes the support roller; the support rod is used to drive the support roller to rise and fall.

6. The electric wheelchair for autonomous stair climbing according to claim 1, characterized in that: Also includes: The handles are symmetrically arranged on both sides of the seat, and are used to assist the user in grasping to ensure that the user is firmly fixed in the seat.

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