Multi-position adjusting wheelchair capable of walking up and down stairs in balanced mode

Abstract

The utility model belongs to the technical field of wheelchairs, and particularly relates to a multi-position adjusting wheelchair capable of walking up and down stairs in a balanced mode, which comprises a bottom frame, four walking wheels are symmetrically installed on the left side and the right side of the bottom frame, the walking wheels are connected with first wheel shafts where the walking wheels are located through first hub motors, and two supporting legs which are symmetrical left and right are hinged to the front side of the bottom frame. The rear side of the bottom frame is fixedly connected with two first hydraulic cylinders which are symmetrical left and right, and the upper ends of the supporting legs and the first hydraulic cylinders are hinged to the seat plate. The visual sensor on the front side of the bottom frame automatically recognizes the height and gradient of the stair to adjust the postures of the front climbing assembly and the rear climbing assembly, so that the front climbing assembly and the rear climbing assembly are attached to the stair in an inclined state to replace four walking wheels to stably move on stair steps.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheelchairs, and in particular relates to a multi-position adjustable wheelchair capable of balanced climbing up and down stairs. Background Art

[0002] With the aging of the population and the increasing attention paid to the rights of the disabled, the demand for equipment to assist the elderly or disabled in walking is also growing. Although traditional wheelchairs have solved the problem of inconvenience in walking for the elderly or disabled to a certain extent, they still have great limitations when facing complex terrains such as stairs. Existing wheelchairs for going up and down stairs require the assistance of a caregiver to complete their smooth walking on the stairs, but cannot achieve their own walking on the stairs. As a result, it is very inconvenient for the elderly or disabled in wheelchairs to go up and down the stairs because they need the assistance of a caregiver. Therefore, it is necessary to design a wheelchair that can go up and down the stairs safely and conveniently. Utility Model Content

[0003] In order to solve the above defects in the prior art, the utility model discloses a multi-position adjustable wheelchair capable of balanced climbing and descending stairs, which is realized by adopting the following technical scheme.

[0004] A multi-position adjustable wheelchair capable of balanced climbing up and down stairs comprises a base frame, four running wheels are symmetrically mounted on the left and right sides of the base frame, the running wheels are connected to a number one wheel axle via a number one wheel hub motor, two left-right symmetrical legs are hingedly mounted on the front side of the base frame, two left-right symmetrical number one hydraulic cylinders are fixedly connected to the rear side of the base frame, the upper ends of the legs and the number one hydraulic cylinders are hingedly mounted to a seat plate, a backrest is mounted on the rear side of the seat plate, climbing assemblies are mounted on the front and rear sides of the base frame, and the two climbing assemblies can replace the four running wheels to enable smooth walking on stair steps without manual assistance.

[0005] The two wheels are connected with the two pairs of side plates, and the two wheels are connected with the two pairs of side plates by two shaft sleeves.

[0006] Furthermore, the backrest is hinged to the rear side of the seat, the left and right sides of the backrest are respectively connected to the corresponding sides of the seat through a No. 2 hydraulic cylinder, and both ends of the No. 2 hydraulic cylinder are respectively hinged to the corresponding sides of the seat and the backrest.

[0007] Furthermore, two armrests are symmetrically installed on the left and right sides of the backrest, and the armrests are provided with a direction control lever, a button No. 1, a button No. 2, a button No. 3 and a button No. 4, the direction control lever is used to control the rotation and steering of the running wheels, the button No. 1 is used to control the two climbing assemblies to replace the four running wheels to form an ascending posture and keep the seat board in a horizontal state during the ascending process, the button No. 2 is used to control the two climbing assemblies to replace the four running wheels to form a descending posture and keep the seat board in a horizontal state, the button No. 3 is used to control the two climbing assemblies to be retracted and replaced by the four running wheels, the button No. 4 is used to control the extension and retraction of the No. 2 hydraulic cylinder, and a visual sensor is provided on the front side of the base frame.

[0008] Furthermore, the backrest is provided with two push handles for assisting the accompanying personnel in pushing the backrest.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0010] 1. The utility model automatically identifies the height and slope of the stairs through the visual sensor on the front side of the base frame to adjust the postures of the front and rear climbing components, so that the front and rear climbing components fit the stairs in an inclined state instead of four walking wheels to move smoothly on the stair steps. At the same time, the utility model adjusts the center of gravity position of the seat board to ensure that the center of gravity of the person sitting on the seat board is located between the two ends of the two climbing components on the horizontal plane, so that the utility model will not tip backward or forward during the process of going up and down the stairs, so that the elderly or disabled people riding the utility model can go up and down the stairs smoothly and safely without the assistance of accompanying personnel, thereby improving the mobility of the elderly or disabled people and greatly expanding their range of activities.

[0011] 2. The seat and backrest in the utility model can be adjusted when going up and down stairs, so that the seat is always in a horizontal state during the process of going up and down stairs, ensuring that the user always maintains the most comfortable sitting posture during the process of going up and down stairs, thereby improving the riding experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall appearance of the utility model;

[0013] Figure 2 It is an overall side sectional schematic diagram of the utility model;

[0014] Figure 3 It is a schematic diagram of the structure on the bottom frame of the utility model;

[0015] Figure 4 It is a cross-sectional schematic diagram of the cooperation between the traveling wheel and the wheel axle in the utility model;

[0016] Figure 5 It is a schematic diagram of the climbing assembly in the utility model;

[0017] Figure 6 It is a schematic cross-sectional view of the crawler structure of the climbing assembly in the utility model;

[0018] Figure 7 It is the matching section of the gear and the second wheel axle of the climbing assembly in the utility model;

[0019] Name of the label in the figure:

[0020] Base frame 1; No. 1 wheel axle 2; walking wheel 3; No. 1 wheel hub motor 4; guide sleeve 5; outrigger 6; No. 1 hydraulic cylinder 7; seat plate 8; backrest 9; push handle 10; No. 2 hydraulic cylinder 11; handrail 12; direction control lever 13; No. 1 button 14; No. 2 button 15; No. 3 button 16; No. 4 button 17; climbing component 18; slide bar 1801; connecting frame 1802; No. 1 round rod 1803; No. 3 hydraulic cylinder 1804; ring sleeve 1805; side plate 1806; bushing 1807; No. 2 wheel axle 1808; gear 1809; No. 2 wheel hub motor 1810; support wheel 1811; crawler track 1812; connecting plate 1813; No. 2 round rod 1814; No. 4 hydraulic cylinder 1815. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below through embodiments and in combination with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections. In the description of the present utility model, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0023] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] like Figure 1-7As shown, a multi-position adjustable wheelchair that can balance going up and down stairs comprises a base frame 1, four running wheels 3 are symmetrically installed on the left and right sides of the base frame 1, the running wheels 3 are connected to the number one wheel axle 2 on which they are located through a number one wheel hub motor 4, two left-right symmetrical legs 6 are hinged on the front side of the base frame 1, two left-right symmetrical number one hydraulic cylinders 7 are fixedly connected to the rear side of the base frame 1, the upper ends of the legs 6 and the number one hydraulic cylinder 7 are hinged to a seat board 8, a backrest 9 is installed on the rear side of the seat board 8, climbing components 18 are installed on the front and rear sides of the base frame 1, the two climbing components 18 can replace the four running wheels 3 to walk smoothly on the steps of stairs without manual assistance, the backrest 9 is hinged to the rear side of the seat board 8, the left and right sides of the backrest 9 are respectively connected to the corresponding sides of the seat board 8 through a number two hydraulic cylinder 11, and the two ends of the number two hydraulic cylinder 11 are respectively connected to the corresponding sides of the seat board 8 and the backrest 9 The backrest 9 is hinged, and two armrests 12 are symmetrically installed on the left and right sides of the backrest 9. The armrests 12 are provided with a direction control lever 13, a number one button 14, a number two button 15, a number three button 16 and a number four button 17. The direction control lever 13 is used to control the rotation and steering of the walking wheel 3. The number one button 14 is used to control two climbing components 18 to replace the four walking wheels 3 to form an upstairs posture and keep the seat 8 in a horizontal state during the upstairs process. The number two button 15 is used to control the two climbing components 18 to replace the four walking wheels 3 to form a downstairs posture and keep the seat 8 in a horizontal state. The number three button 16 is used to control the two climbing components 18 to be retracted and replaced by the four walking wheels 3. The number four button 17 is used to control the extension and retraction of the number two hydraulic cylinder 11. A visual sensor is provided on the front side of the base frame 1. The backrest 9 is provided with two push handles 10 for the accompanying personnel to assist in pushing.

[0025] like Figure 5 , 6As shown in , 7, the climbing assembly 18 includes two pairs of side plates 1806, the two pairs of side plates 1806 are symmetrically distributed on the left and right and are fixedly connected by two shaft sleeves 1807, each pair of side plates 1806 is fixedly connected by a connecting plate 1813, a second wheel axle 1808 is rotatably arranged in the shaft sleeve 1807, the second wheel axle 1808 is rotatably connected to the two pairs of side plates 1806, two gears 1809 are installed at both ends of each pair of side plates 1806, the gears 1809 are connected to the second wheel axle 1808 through a second wheel hub motor 1810, a crawler track 1812 is installed on each pair of gears 1809, and a plurality of pairs of crawler tracks 1812 are arranged between each pair of side plates 1806 to form a support for the working surface. The support wheel 1811, one of the shaft sleeves 1807 is sleeved with two ring sleeves 1805, and a slide bar 1801 is installed on the ring sleeve 1805. The slide bar 1801 slides vertically in the guide sleeve 5 on the base frame 1, and the upper ends of the two slide bars 1801 are integrally connected through a connecting frame 1802, and the connecting frame 1802 is connected to the upper end of the No. 3 hydraulic cylinder 1804, and the lower end of the No. 3 hydraulic cylinder 1804 is connected to the base frame 1, and a No. 1 round rod 1803 is installed in the connecting frame 1802, and the No. 1 round rod 1803 is rotatably connected to the round sleeve at one end of the No. 4 hydraulic cylinder 1815, and the other end round sleeve of the No. 4 hydraulic cylinder 1815 is rotatably linked to the No. 2 round rod 1814 connecting the two pairs of side plates 1806.

[0026] The method of using the utility model is as follows:

[0027] In the flat ground movement mode, the utility model is supported by four running wheels 3, and the two climbing assemblies 18 are in a retracted state.

[0028] In the flat ground movement mode, the direction control lever 13 is manually controlled to drive the four running wheels 3 to rotate or turn.

[0029] When on the horizontal ground, the two No. 2 hydraulic cylinders 11 can be activated to extend and retract by pressing the No. 4 button 17. The two No. 2 hydraulic cylinders 11 drive the backrest 9 to swing a certain amplitude relative to the seat 8, thereby completing the angle adjustment of the backrest 9, allowing the user to sit on the seat 8 in a more comfortable posture.

[0030] When it is necessary to go upstairs, the direction control lever 13 is pushed first to drive the utility model to move toward the stairs. When the utility model moves to the side of the stairs, the No. 1 button 14 is pressed to switch to the upstairs mode, and the two climbing components 18 are started. The No. 3 hydraulic cylinder 1804 in the climbing component 18 first drives the entire climbing component 18 to move downward, so that the ring sleeve 1805 end of the crawler track 1812 in the two climbing components 18 is against the ground and finally the two climbing components 18 replace the four running wheels 3 to form a four-point support for the utility model, and the base frame 1 drives the four running wheels 3 to be suspended off the ground while the two climbing components 18 continue to move downward.

[0031] After the four walking wheels 3 are suspended from the ground, the No. 2 wheel hub motor 1810 in the two climbing assemblies 18 will drive the four crawlers 1812 to move, and the four crawlers 1812 drive the utility model to approach the stairs. The visual sensor on the front side of the base frame 1 identifies the height and slope of the stairs, and the No. 4 hydraulic cylinder 1815 in the front climbing assembly 18 extends and drives the climbing assembly 18 to swing down a certain angle around the central axis of the ring sleeve 1805, so that the crawler 1812 in the front climbing assembly 18 is inclined and fits with the stairs. The utility model has four crawlers in the two climbing mechanisms. Driven by 1812 and guided by the front climbing component 18, it moves obliquely upward along the stairs. At the same time, the No. 4 hydraulic cylinder 1815 of the rear climbing component 18 will drive the corresponding two crawlers 1812 to continue to swing down and keep them against the ground, so as to avoid the backward tipping over due to lack of support at the rear in the initial stage of the upward movement of the utility model from the bottom of the stairs. Before the rear climbing component 18 completely moves to the stairs, the inclination angles of the two climbing mechanisms on the front and rear sides change at any time and always keep the two climbing components 18 to form front and rear support for the utility model.

[0032] When the utility model completely reaches the stairs, the two crawlers 1812 in the rear climbing assembly 18 are tilted and fitted with the stairs, and the two climbing assemblies 18 respectively support the utility model from the front and rear sides of the base frame 1 and move smoothly driven by the four crawlers 1812. During the upward movement of the utility model along the stairs, the two No. 1 hydraulic cylinders 7 extend synchronously and drive the rear side of the seat plate 8 to swing up a certain amplitude relative to the two legs 6, so that the seat plate 8 maintains a horizontal state and the overall center of gravity is located between the upper and lower ends of the two climbing assemblies 18 without tipping over, thereby having higher safety.

[0033] When it is necessary to go downstairs, the direction control lever 13 is pushed first to drive the utility model to move toward the stairs. When the utility model moves to the side of the stairs, the No. 2 button 15 is pressed to switch to the downstairs mode, and the two climbing components 18 are started. The No. 3 hydraulic cylinder 1804 in the climbing component 18 first drives the entire climbing component 18 to move downward, so that the ring sleeve 1805 end of the crawler track 1812 in the two climbing components 18 is against the ground and finally the two climbing components 18 replace the four running wheels 3 to form a four-point support for the utility model, and the base frame 1 drives the four running wheels 3 to be suspended off the ground while the two climbing components 18 continue to move downward.

[0034] After the four walking wheels 3 are suspended from the ground, the No. 2 wheel hub motor 1810 in the two climbing assemblies 18 will drive the four crawlers 1812 to move, and the four crawlers 1812 drive the utility model to approach the stairs. The visual sensor on the front side of the chassis 1 identifies the height and slope of the stairs, and the No. 4 hydraulic cylinder 1815 in the front climbing assembly 18 extends and drives the front climbing assembly 18 to swing down a certain angle around the central axis of the ring sleeve 1805, so that the crawlers 1812 in the front climbing assembly 18 are inclined and fit with the stairs. The utility model has four crawlers in the two climbing mechanisms Driven by 1812 and guided by the front climbing component 18, it moves obliquely upward along the stairs. At the same time, the No. 4 hydraulic cylinder 1815 of the rear climbing component 18 will drive the corresponding two crawlers 1812 to continue to swing down and keep them against the ground, so as to avoid the front or rear tipping over due to the lack of front and rear support in the initial stage of the utility model moving downward from the top of the stairs. Before the rear climbing component 18 completely moves to the stairs, the inclination angles of the two climbing mechanisms on the front and rear sides change at any time and always keep the two climbing components 18 to form front and rear support for the utility model.

[0035] When the utility model completely reaches the stairs, the two crawlers 1812 in the rear climbing assembly 18 are tilted and fitted with the stairs, and the two climbing assemblies 18 respectively support the utility model from the front and rear sides of the base frame 1 and move smoothly driven by the four crawlers 1812. During the utility model moving down the stairs, the two No. 1 hydraulic cylinders 7 contract synchronously and drive the rear side of the seat plate 8 to swing down a certain amplitude relative to the two legs 6, so that the seat plate 8 maintains a horizontal state and the overall center of gravity is located between the upper and lower ends of the two climbing assemblies 18 without tipping forward, thereby having higher safety.

[0036] When the utility model reaches the flat ground from the inclined stairs, the No. 3 button 16 is pressed to switch to the flat ground movement mode, and the No. 3 hydraulic cylinder 1804, the No. 4 hydraulic cylinder 1815 and the No. 2 wheel hub motor 1810 in the two climbing components 18 are started to drive the two climbing components 18 to complete the recovery and reset. During the recovery process of the climbing components 18, the four walking wheels 3 gradually replace the four crawler tracks 1812 to resist the ground.

Claims

1. A multi-position adjustable wheelchair capable of balanced climbing and descending stairs, characterized in that: The invention comprises a base frame (1), wherein four running wheels (3) are symmetrically mounted on the left and right sides of the base frame (1), wherein the running wheels (3) are connected to the first wheel axle (2) via a first wheel hub motor (4), wherein the front side of the base frame (1) is hinged with two left-right symmetrical legs (6), and the rear side of the base frame (1) is fixedly connected with two left-right symmetrical first hydraulic cylinders (7), wherein the upper ends of the legs (6) and the first hydraulic cylinders (7) are hinged with a seat plate (8), and a backrest (9) is mounted on the rear side of the seat plate (8), and climbing components (18) are mounted on the front and rear sides of the base frame (1), and the two climbing components (18) can replace the four running wheels (3) to enable the user to walk smoothly on the steps of a staircase without manual assistance; The climbing assembly (18) comprises two pairs of side plates (1806), the two pairs of side plates (1806) are symmetrically distributed on the left and right and are fixedly connected by two shaft sleeves (1807), each pair of side plates (1806) is fixedly connected by a connecting plate (1813), a second wheel axle (1808) is rotatably arranged in the shaft sleeve (1807), the second wheel axle (1808) is rotatably connected to the two pairs of side plates (1806), two gears (1809) are installed at both ends of each pair of side plates (1806), the gears (1809) are connected to the second wheel axle (1808) via a second wheel hub motor (1810), a crawler (1812) is installed on each pair of gears (1809), and a plurality of pairs of crawler (1812) working surfaces are arranged between each pair of side plates (1806) to form a supporting wheel (1813) supporting the supporting wheel. 811), two ring sleeves (1805) are sleeved on one of the shaft sleeves (1807), a slide bar (1801) is installed on the ring sleeve (1805), the slide bar (1801) slides vertically in the guide sleeve (5) on the base frame (1), the upper ends of the two slide bars (1801) are integrally connected through a connecting frame (1802), the connecting frame (1802) is connected to the upper end of the No. 3 hydraulic cylinder (1804), the lower end of the No. 3 hydraulic cylinder (1804) is connected to the base frame (1), a No. 1 round rod (1803) is installed in the connecting frame (1802), the No. 1 round rod (1803) is rotatably connected to the round sleeve at one end of the No. 4 hydraulic cylinder (1815), and the other end round sleeve of the No. 4 hydraulic cylinder (1815) is rotatably connected to the No. 2 round rod (1814) connecting the two pairs of side plates (1806).

2. A multi-position adjustable wheelchair capable of balanced climbing and descending stairs according to claim 1, characterized in that: The backrest (9) is hinged to the rear side of the seat plate (8), and the left and right sides of the backrest (9) are respectively connected to the corresponding sides of the seat plate (8) through a No. 2 hydraulic cylinder (11), and the two ends of the No. 2 hydraulic cylinder (11) are respectively hinged to the corresponding sides of the seat plate (8) and the backrest (9).

3. A multi-position adjustable wheelchair capable of balanced climbing and descending stairs according to claim 2, characterized in that: Two armrests (12) are symmetrically mounted on the left and right sides of the backrest (9). The armrests (12) are provided with a direction control lever (13), a first button (14), a second button (15), a third button (16) and a fourth button (17). The direction control lever (13) is used to control the rotation and steering of the running wheels (3). The first button (14) is used to control the two climbing assemblies (18) to replace the four running wheels (3) to form an ascending posture and keep the seat board (8) in a horizontal state during the ascending process. The second button (15) is used to control the two climbing assemblies (18) to replace the four running wheels (3) to form a descending posture and keep the seat board (8) in a horizontal state. The third button (16) is used to control the two climbing assemblies (18) to be retracted and replaced by the four running wheels (3). The fourth button (17) is used to control the extension and retraction of the second hydraulic cylinder (11). A visual sensor is provided on the front side of the base frame (1).

4. The multi-position adjustable wheelchair capable of balanced climbing and descending stairs according to claim 1, characterized in that: The backrest (9) is provided with two push handles (10) for assisting the accompanying personnel in pushing the backrest.

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