Electric wheelchair capable of achieving lifting adjustment

Abstract

The utility model belongs to the technical field of electric wheelchairs, and provides an electric wheelchair capable of realizing lifting adjustment, which comprises an electric wheelchair main body mainly consisting of a seat plate, a backrest, a headrest, a control handle, a leg support, a foot support, wheels, a battery and a driving motor, and further comprises a base fixedly arranged at the bottom of the electric wheelchair main body, the first fixing rods are symmetrically arranged on the two sides of the base, the second fixing rods are symmetrically arranged on the two sides of the seat plate, the shear fork type connecting rod mechanism is arranged between the first fixing rods and the second fixing rods and connected with the first fixing rods and the second fixing rods, and the hydraulic cylinder is arranged between the base and the seat plate and used for driving the seat plate to ascend and descend. The seat plate is driven by the hydraulic cylinder to lift relative to the bottom plate, the lifting action is stable and reliable, and a user can adjust the height of the seat according to the required use height and comfort degree.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric wheelchairs, and in particular relates to an electric wheelchair capable of realizing lifting and lowering adjustment. Background Art

[0002] Electric wheelchairs are modified and upgraded on the basis of traditional manual wheelchairs by adding high-performance power drive devices, control devices, batteries and other components. They are mainly used as important mobility tools for patients and disabled people for home rehabilitation and outdoor activities. They can complete multiple functions such as moving forward, backward, and turning. In actual use, existing conventional electric wheelchairs still have the following deficiencies: the seat height of electric wheelchairs cannot be adjusted up and down, resulting in users being unable to cope with usage scenarios that require a certain height. For example, when pressing the elevator floor, when the floor button is high, the conventional sitting posture does not have enough height, and the user cannot press the floor button normally. Utility Model Content

[0003] The utility model aims to provide an electric wheelchair that can be raised and lowered to solve the problem in the prior art that the seat height of the electric wheelchair cannot be raised and lowered, resulting in the user being unable to cope with usage scenarios that require a certain height.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] An electric wheelchair capable of achieving lifting and lowering adjustment comprises an electric wheelchair body mainly composed of a seat plate, a backrest, a headrest, a control handle, a leg rest, a foot rest, wheels, a battery and a driving motor, and also comprises a base fixedly arranged at the bottom of the electric wheelchair body, a first fixing rod symmetrically arranged on both sides of the base, a second fixing rod symmetrically arranged on both sides of the seat plate, a scissor-type connecting rod mechanism arranged between and connected to the first fixing rod and the second fixing rod, and a hydraulic cylinder arranged between the base and the seat plate and used for driving the seat plate to be lifted and lowered; the front ends of the first fixing rod and the second fixing rod are connected to the front ends of the scissor-type connecting rod mechanism through a fixed shaft, the rear ends of the first fixing rod and the second fixing rod are provided with a slide groove arranged along their length direction, and the rear end of the scissor-type connecting rod mechanism is connected to the slide groove through a pulley.

[0006] Furthermore, a chassis located below the base is provided at the bottom of the electric wheelchair body, and the wheels include a left front wheel and a left rear wheel located on the left side of the chassis, and a right front wheel and a right rear wheel located on the right side.

[0007] Furthermore, the drive motor includes a left drive motor arranged on the left side of the chassis and a right drive motor arranged on the right side, the left drive motor drives the left front wheel and the left rear wheel through a gear set, and the right drive motor drives the right front wheel and the right rear wheel through a gear set.

[0008] Furthermore, the gear set includes five gears arranged in a straight line and meshing with each other, the left front wheel is connected to the gear at the front end of the gear set through an axis, the left rear wheel is connected to the gear at the rear end of the gear set through an axis, and the output shaft of the left drive motor is connected to the gear in the middle of the gear set.

[0009] Furthermore, the backrest and the seat plate are connected via a backrest folding hinge.

[0010] Furthermore, the upper end of the leg rest is connected to the lower end surface of the seat plate through a leg rest folding hinge.

[0011] Furthermore, one end of the foot rest is connected to the lower end of the leg rest through a foot rest folding hinge.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] (1) The utility model has a base at the bottom of the electric wheelchair, and a first fixing rod and a second fixing rod are respectively provided at the upper end of the base and the lower end of the bottom plate, and a scissor-type connecting rod mechanism is provided between the first fixing rod and the second fixing rod. At the same time, a hydraulic cylinder is provided between the base and the seat plate, and the seat plate is driven to move up and down relative to the bottom plate by the hydraulic cylinder, and the lifting action is stable and reliable. The user can adjust the seat height according to the required use height and comfort level.

[0014] (2) The driving motor in the utility model includes a left driving motor and a right driving motor, wherein the left driving motor drives the left front wheel and the left rear wheel through a gear set, and the right driving motor drives the right front wheel and the right rear wheel through a gear set, thereby enabling the electric wheelchair to turn on the spot, which is convenient and flexible to use.

[0015] (3) In the utility model, the backrest is connected to the seat plate by a backrest folding hinge, the leg rest is connected to the seat plate by a leg rest folding hinge, and the foot rest is connected to the leg rest by a foot rest folding hinge. Through the above-mentioned foldable design, the overall device can be reduced in size and convenient to put into the trunk of an ordinary car for easy carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 .

[0017] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 .

[0018] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 3 .

[0019] Figure 4The three-dimensional structure of the utility model is shown in FIG. Figure 4 .

[0020] Figure 5 The three-dimensional structure of the utility model is shown in FIG. Figure 5 .

[0021] Figure 6 The three-dimensional structure of the utility model is shown in FIG. Figure 6 .

[0022] The names corresponding to the reference numerals are as follows: 1-seat plate, 2-backrest, 3-headrest, 4-control handle, 5-leg support, 6-foot support, 7-wheel, 8-battery, 9-drive motor, 10-base, 11-first fixed rod, 12-second fixed rod, 13-scissor-type connecting rod mechanism, 14-hydraulic cylinder, 15-fixed shaft, 16-slide, 17-pulley, 18-chassis, 19-gear set, 20-backrest folding hinge, 21-leg support folding hinge, 22-foot support folding hinge, 23-armrest, 24-shock-absorbing spring;

[0023] 71-left front wheel, 72-left rear wheel, 73-right front wheel, 74-right rear wheel;

[0024] 91-left drive motor, 92-right drive motor. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to have a clearer understanding and knowledge of the present invention, the present invention is further described in detail in conjunction with the following embodiments. It should be noted that the specific embodiments described below are only used to explain the present invention and facilitate understanding. The technical solutions provided by the present invention are not limited to the technical solutions provided by the following embodiments, and the technical solutions provided by the embodiments should not limit the protection scope of the present invention.

[0026] Unless otherwise defined, the technical terms or scientific terms used in the disclosure of this application shall have the usual meanings understood by persons with ordinary skills in the field to which the disclosure belongs. The words "include" or "comprise" and the like used in this application mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The positional relationship words "upper", "lower", "left", "right", "front", "back", etc. are determined according to the layout direction of the drawings in the specification, and are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] Example

[0028] like Figures 1 to 6As shown, the present embodiment provides an electric wheelchair that can achieve lifting and lowering adjustment, which mainly includes an electric wheelchair body, and the electric wheelchair body is mainly composed of a seat plate, a backrest, a headrest, a control handle, a leg rest, a foot rest, wheels, a battery and a driving motor, wherein the bottom plate seat is the seat of the user, armrests are arranged on both sides of the bottom plate, and the control handle is arranged on the armrest on one side for convenient operation and control; the headrest is arranged at the upper end of the backrest for supporting the user's head; the leg rest and the foot rest are supporting parts for the user's lower limbs, and the upper end of the leg rest is connected to the bottom plate, and the lower end is connected to the foot rest.

[0029] In this embodiment, a folding design is adopted, and the structure of the folding design is as follows: the backrest and the seat are connected by a backrest folding hinge, the upper end of the leg rest is connected to the lower end surface of the seat by a leg rest folding hinge, and one end of the foot rest is connected to the lower end of the leg rest by a foot rest folding hinge; through the above arrangement, the backrest, leg rest and foot rest can be folded to reduce the volume of the entire electric wheelchair for easy carrying.

[0030] In this embodiment, a base is provided at the bottom of the electric wheelchair body, and a lifting mechanism for controlling the lifting action of the bottom plate relative to the base is provided between the base and the bottom plate, which mainly includes a first fixing rod symmetrically arranged on both sides of the base, a second fixing rod symmetrically arranged on both sides of the seat plate, a scissor-type connecting rod mechanism arranged between the first fixing rod and the second fixing rod and connected to the two, and a hydraulic cylinder arranged between the base and the seat plate and used for driving the seat plate to lift and lower; wherein the first fixing rod and the second fixing rod have the same structure and are named separately here for the convenience of distinction, the lower end of the hydraulic cylinder is fixedly connected to the base, and the upper end thereof is a telescopic end and is connected to the lower end surface of the bottom plate.

[0031] The control of the hydraulic cylinder is integrated on the control handle, and the base plate is driven to rise and fall by the lifting of the hydraulic cylinder. At the same time, based on the structure of the first fixed rod and the second fixed rod, a scissors-type linkage mechanism is arranged between the two. The connection structure of the scissors-type linkage mechanism and the first fixed rod and the second fixed rod is as follows: the front ends of the first fixed rod and the second fixed rod are connected to the front end of the scissors-type linkage mechanism through a fixed shaft. Specifically, the front ends of the first fixed rod and the second fixed rod are connected to the front end positions of the upper and lower ends of the scissors-type linkage mechanism through the fixed shaft, and the rear ends of the first fixed rod and the second fixed rod are provided with a slide groove arranged along the length direction thereof, and the rear end of the scissors-type linkage mechanism is connected to the slide groove through a pulley. Specifically, the slide grooves at the rear ends of the first fixed rod and the second fixed rod are connected to the rear end positions of the upper and lower ends of the scissors-type linkage mechanism through the pulley; preferably, the slide groove adopts a strip hole structure, and the pulley is embedded in the slide groove and can move along the slide groove. In other implementation schemes, a slider can also be used instead of the pulley, and the slider is cut into the slide groove. The hydraulic cylinder moves up and down, thereby driving the seat plate to move up and down relative to the base. The front end position of the upper end of the scissor-type linkage mechanism rotates relative to the second fixed rod, and the rear end position moves along the sliding groove of the second fixed rod. The front end position of the lower end of the scissor-type linkage mechanism rotates relative to the first fixed rod, and the rear end position moves along the sliding groove of the first fixed rod.

[0032] The bottom of the electric wheelchair body is provided with a chassis located below the base. The base and the chassis are fixedly connected. The chassis adopts a frame structure, which mainly provides an installation bearing space for the installation of other components. In a further preferred embodiment, the base and the chassis can also be made into an integrated structure, and the battery is arranged at the lower end surface of the chassis.

[0033] Based on the chassis structure, the wheels include a left front wheel and a left rear wheel located on the left side of the chassis, and a right front wheel and a right rear wheel on the right side. Based on the setting of the above wheels, the drive motor includes a left drive motor arranged on the left side of the chassis and a right drive motor on the right side. The left drive motor drives the left front wheel and the left rear wheel through a gear set, and the right drive motor drives the right front wheel and the right rear wheel through a gear set. According to the above setting, the battery may include a left battery for powering the left drive motor and a right battery for powering the right drive motor.

[0034] In this embodiment, the gear set includes five gears arranged in a straight line and meshing with each other. The left front wheel is connected to the gear at the front end of the gear set through an axis, the left rear wheel is connected to the gear at the rear end of the gear set through an axis, and the output shaft of the left drive motor is connected to the gear in the middle of the gear set; the connection mode between the right front wheel and the right rear wheel and the gear set is the same as the connection mode between the left front wheel and the left rear wheel and the gear set, so it will not be described in detail here; each gear in the gear set is supported by the side panel of the chassis; in a further preferred embodiment, a shock absorbing mechanism composed of a shock absorbing spring can be set at the wheel position to improve the shock absorbing effect of the electric wheelchair. The specific setting mode is an existing mature structure, so it will not be described in detail here. Through the above setting, the turning function of the electric wheelchair can be realized by controlling the different rotation speeds of the left and right wheels, and the rotation and turning of the electric wheelchair in situ can be realized by controlling the different directions of the left and right wheels.

[0035] The above is the preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements without departing from the design principle and technical solution of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. An electric wheelchair capable of achieving lifting and lowering adjustment, comprising an electric wheelchair body mainly composed of a seat plate (1), a backrest (2), a headrest (3), a control handle (4), a leg support (5), a foot support (6), wheels (7), a battery (8) and a drive motor (9), characterized in that: The electric wheelchair further comprises a base (10) fixedly arranged at the bottom of the electric wheelchair body, a first fixing rod (11) symmetrically arranged on both sides of the base (10), a second fixing rod (12) symmetrically arranged on both sides of the seat plate (1), a scissor-type connecting rod mechanism (13) arranged between and connected to the first fixing rod (11) and the second fixing rod (12), and a hydraulic cylinder (14) arranged between the base (10) and the seat plate (1) and used for driving the seat plate (1) to rise and fall; the front ends of the first fixing rod (11) and the second fixing rod (12) are connected to the front end of the scissor-type connecting rod mechanism (13) through a fixing shaft (15), the rear ends of the first fixing rod (11) and the second fixing rod (12) are provided with a slide groove (16) arranged along the length direction thereof, and the rear end of the scissor-type connecting rod mechanism (13) is connected to the slide groove (16) through a pulley (17).

2. The electric wheelchair capable of realizing lifting and lowering adjustment according to claim 1, characterized in that: A chassis (18) located below the base (10) is provided at the bottom of the electric wheelchair body, and the wheels (7) include a left front wheel (71) and a left rear wheel (72) located on the left side of the chassis (18), and a right front wheel (73) and a right rear wheel (74) located on the right side.

3. The electric wheelchair capable of realizing lifting and lowering adjustment according to claim 2, characterized in that: The drive motor (9) comprises a left drive motor (91) arranged on the left side of the chassis (18) and a right drive motor (92) arranged on the right side. The left drive motor (91) drives the left front wheel (71) and the left rear wheel (72) through a gear set (19), and the right drive motor (92) drives the right front wheel (73) and the right rear wheel (74) through a gear set (19).

4. The electric wheelchair capable of realizing lifting and lowering adjustment according to claim 3, characterized in that: The gear set (19) comprises five gears arranged in a straight line and meshing with each other. The left front wheel (71) is connected to the frontmost gear of the gear set (19) via a shaft, the left rear wheel (72) is connected to the rearmost gear of the gear set (19) via a shaft, and the output shaft of the left drive motor (91) is connected to the middle gear of the gear set (19).

5. The electric wheelchair capable of realizing lifting and lowering adjustment according to claim 4, characterized in that: The backrest (2) is connected to the seat plate (1) via a backrest folding hinge (20).

6. The electric wheelchair capable of realizing lifting and lowering adjustment according to claim 5, characterized in that: The upper end of the leg rest (5) is connected to the lower end surface of the seat plate (1) via a leg rest folding hinge (21).

7. The electric wheelchair capable of realizing lifting and lowering adjustment according to claim 6, characterized in that: One end of the footrest (6) is connected to the lower end of the legrest (5) via a footrest folding hinge (22).

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