Electric wheelchair suitable for multiple terrains

Abstract

The invention discloses an electric wheelchair suitable for multiple land types, and relates to the technical field of electric wheelchairs, the electric wheelchair comprises a bottom plate, a wheelchair frame is fixedly mounted at the top end of the bottom plate, an anti-rollover assembly is arranged at the bottom end of the wheelchair frame, two armrests are mounted on the outer wall of the wheelchair frame, and containing assemblies are arranged on the outer walls of the two armrests; the anti-rollover assembly comprises a machine shell, a two-way screw is rotationally installed on the inner wall of the machine shell, two movable sliding blocks are arranged on the outer wall of the two-way screw, L-shaped frames are fixedly installed on the outer walls of the two movable sliding blocks, anti-rollover wheels are fixedly installed at one ends of the outer walls of the two L-shaped frames, and the distance between the two anti-rollover wheels is controlled through the two-way screw. The anti-rollover wheels provide additional lateral supporting force, the anti-rollover capacity is improved, the running stability is improved, when the anti-rollover assemblies move the distance between the two anti-rollover wheels, the gravity center of a driver on the device can be lowered, and the stability of the device is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric wheelchairs, and in particular to an electric wheelchair suitable for multiple terrains. Background Art

[0002] With the development of society and the advancement of technology, electric wheelchairs are gaining more and more attention as a means of transportation that provides convenience for people with limited mobility. Traditional electric wheelchairs are often optimized for specific terrains. For example, they are smoother on flat roads, but their passability and stability are greatly reduced in complex terrains such as rugged mountain roads, grasslands, and sandy areas.

[0003] In the prior art, for example, Chinese patent number CN118178115A discloses an electric wheelchair suitable for multiple terrains, which relates to the technical field of electric wheelchairs and includes a chassis, a first storage and retrieval mechanism, wherein the first storage and retrieval mechanism includes a basket and a support frame, wherein the basket is fixedly installed on the front side of the middle top of the chassis by bolts, and the support frame is fixedly installed on the middle top of the chassis by bolts. The present invention is designed to install a second storage and retrieval mechanism, which drives the lifting box to rise and rotate from the middle top of the chassis to the armrest of the folding seat through the limiting support of the limiting cylinder, which not only saves space in the electric wheelchair, but also facilitates the driver to take items, thereby increasing the storage space of the electric wheelchair, and facilitating the driver's use of the electric wheelchair without affecting the folding of the electric wheelchair.

[0004] Although the above patent can facilitate the driver to use the electric wheelchair, there are still some problems. When the electric wheelchair in the patent passes through some rugged roads, it may cause the wheelchair to roll over due to unstable center of gravity. At the same time, although the patent can make the lifting box rotate and rise, it is equipped with multiple gears, transmission belts, threaded rods, slides and other components. The complex structure may increase the probability of failure, such as gear wear, belt breakage, threaded rod jamming and other problems, thereby affecting the reliability and service life of the electric wheelchair. To this end, the present invention provides an electric wheelchair suitable for multiple terrains. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an electric wheelchair suitable for multiple terrains, which solves the problem that the electric wheelchair of the patent may roll over due to unstable center of gravity when passing through some rugged roads. At the same time, although the patent can make the lifting box rotate and rise, it is equipped with components including multiple gears, transmission belts, threaded rods, slide cylinders, etc. The complex structure may increase the probability of failure, such as gear wear, belt breakage, threaded rod jamming and other problems, thereby affecting the reliability and service life of the electric wheelchair.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an electric wheelchair applicable to multiple terrains, comprising a bottom plate, two movable wheels are rotatably mounted on the bottom end of the bottom plate, two universal wheels are fixedly mounted on the bottom end of the bottom plate, a wheelchair frame is fixedly mounted on the top end of the bottom plate, an anti-rollover assembly is arranged at the bottom end of the wheelchair frame, two handrails are fixedly mounted on the outer wall of the wheelchair frame, and the outer walls of the two handrails are both provided with a containing assembly; The anti-rollover assembly comprises a casing, a bidirectional screw is rotatably mounted on the inner wall of the casing, two movable sliders are threadedly connected to the outer wall of the bidirectional screw, an L-shaped frame is fixedly mounted on the outer wall of the two movable sliders, a spring shock absorber is fixedly mounted on one end of the outer wall of the two L-shaped frames, and an anti-rollover wheel is fixedly mounted on the bottom end of the two spring shock absorbers; The containing assembly comprises a fixed cylinder, a rotating cylinder is movably inserted in the fixed cylinder, and a spiral slide groove is formed on the outer wall of the rotating cylinder.

[0007] Preferably, the casing is fixedly connected to the wheelchair frame, the two movable sliders are movably inserted into the inner wall of the casing, the top ends of the two movable sliders are fixedly installed with a first hinge seat, the inner walls of the two first hinge seats are rotatably installed with a support plate, one end of the outer walls of the two support plates are rotatably installed with a second hinge seat, and the top ends of the two second hinge seats are fixedly installed with a lifting cushion.

[0008] Preferably, a fixing plate is fixedly mounted on the outer walls of the two armrests, a limiting slide groove is penetrated through the top ends of the two fixing plates, a slide plate is slidably connected to the inner walls of the two limiting slide grooves, and the two slide plates are fixedly connected to the lifting cushion, and a motor is fixedly mounted on the outer wall of the casing, and the output end of the motor penetrates the inner wall of the casing and is fixedly connected to one end of the outer wall of the bidirectional screw.

[0009] Preferably, a first mounting plate is fixedly mounted on the outer wall of the fixed cylinder, the first mounting plate is fixedly connected to the handrail, a fixed sliding column is fixedly inserted on the outer wall of the fixed cylinder, and the fixed sliding column is movably inserted on the inner wall of the spiral slide groove.

[0010] Preferably, a connecting rod is fixedly mounted on the bottom end of the rotating cylinder, a connecting plate is fixedly mounted on the bottom end of the connecting rod, and a containing basket is fixedly mounted on the top end of the connecting plate.

[0011] Preferably, a second mounting plate is fixedly mounted on the outer wall of the handrail, an electric push rod is fixedly mounted on the top end of the second mounting plate, a rotating block is fixedly mounted on the output end of the electric push rod, and the rotating block is rotatably connected to the rotating cylinder.

[0012] Preferably, a battery pack is fixedly mounted on the top of the base plate, a controller is fixedly mounted on the top of the armrest, the battery pack is electrically connected to the controller, and the battery pack is electrically connected to the motor and the two electric push rods respectively.

[0013] Preferably, the controller is electrically connected to the motor and the two electric push rods respectively.

[0014] Beneficial Effects The present invention provides an electric wheelchair suitable for multiple terrains. Compared with the prior art, it has the following beneficial effects: (1) When the electric wheelchair applicable to multiple terrains encounters a relatively rough road during driving, in order to prevent the device from rolling over, the motor can be turned on, and the motor drives the bidirectional screw to rotate. The two movable sliders on the bidirectional screw move in opposite directions at the same time under the action of the thread, and the movable sliders then drive the two L-shaped frames, spring shock absorbers and anti-rollover wheels to move to both sides. When the wheelchair is subjected to lateral force, the anti-rollover wheels provide additional lateral support force to offset part of the lateral force, reduce the roll angle, and improve the anti-rollover ability. Once an unstable situation occurs, the anti-rollover wheels can be extended in time to provide additional support to protect the safety of the user. The spring shock absorber can also reduce vibration and impact and improve the stability of driving.

[0015] (2) In the electric wheelchair suitable for multiple terrains, when the movable slider moves to both sides, the movable slider will drive the two support plates to move away from each other. During the process of the two support plates moving away from each other, the angle between the support plates and the bidirectional screw will decrease, thereby lowering the lifting cushion. At this time, the center of gravity of the driver on the device will be lowered, thereby further improving the stability of the device on rough roads.

[0016] (3) When the electric wheelchair is suitable for multiple locations, when it is necessary to use the basket to place items, the electric push rod can be turned on, and the electric push rod drives the rotating cylinder to rise. Due to the provision of a spiral slide and a fixed slide column, the spiral slide is restricted by the fixed slide column, so that the rotating cylinder rotates in the fixed cylinder during the rising process. The rotating cylinder drives the basket to rise and rotate to the armrest through the connecting rod and the connecting plate, thereby facilitating the taking of items in the basket. When the basket is not needed, the electric push rod can be turned on again, and the electric push rod drives the rotating cylinder to descend, thereby causing the basket to descend and rotate to the rear side of the wheelchair frame, thereby reducing the width of the device and preventing the basket from colliding with other objects in a narrow environment. At the same time, the basket can be rotated and ascended with fewer structures. When the basket fails to rotate and ascend, fewer structures make fault detection and maintenance easier, reducing maintenance time and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of another perspective of the present invention; Figure 3 It is a schematic diagram of the main structure of the present invention; Figure 4 It is a schematic diagram of the handrail and the anti-rollover assembly of the present invention; Figure 5 It is a partial structural cross-sectional view of the anti-rollover assembly of the present invention; Figure 6 It is a schematic diagram of a containing assembly of the present invention; Figure 7 This is a schematic diagram of a containing component from another perspective of the present invention.

[0018] In the figure: 1. bottom plate; 2. moving wheel; 3. universal wheel; 4. wheelchair frame; 5. armrest; 6. controller; 7. anti-rollover assembly; 71. lifting cushion; 72. casing; 73. bidirectional screw; 74. moving slider; 75. motor; 76. L-shaped frame; 78. spring shock absorber; 79. anti-rollover wheel; 710. first hinge seat; 711. support plate; 712. second hinge seat; 713. slide plate; 8. holding assembly; 801. fixed cylinder; 802. first mounting plate; 803. fixed slide column; 804. spiral slide groove; 805. rotating block; 806. second mounting plate; 807. electric push rod; 808. connecting rod; 809. connecting plate; 810. holding basket; 811. rotating cylinder; 9. fixed plate; 10. limit slide groove; 11. battery pack. DETAILED DESCRIPTION

[0019] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0020] The present invention provides two technical solutions: Figure 1-Figure 7 The first embodiment is shown: an electric wheelchair applicable to multiple places, comprising a base plate 1, two movable wheels 2 are rotatably mounted on the bottom end of the base plate 1, two universal wheels 3 are fixedly mounted on the bottom end of the base plate 1, a wheelchair frame 4 is fixedly mounted on the top end of the base plate 1, an anti-rollover assembly 7 is arranged at the bottom end of the wheelchair frame 4, two handrails 5 are fixedly mounted on the outer wall of the wheelchair frame 4, and the outer walls of the two handrails 5 are both provided with a containing assembly 8; The anti-rollover assembly 7 comprises a housing 72, the inner wall of which is rotatably mounted a bidirectional screw 73, the outer wall of which is threadedly connected to two movable sliders 74, the outer walls of the two movable sliders 74 are both fixedly mounted with L-shaped frames 76, one end of the outer walls of the two L-shaped frames 76 are both fixedly mounted with spring shock absorbers 78, the bottom ends of the two spring shock absorbers 78 are both fixedly mounted with anti-rollover wheels 79, the spring shock absorbers 78 can effectively buffer the vibration from the ground, during driving, the unevenness of the ground may cause the anti-rollover wheels 79 to lose contact instantly, and the elastic effect of the spring shock absorbers 78 can enable the anti-rollover wheels 79 to quickly adjust their positions when bumped, ensuring contact with the ground, thereby improving the stability of the wheelchair; The containing assembly 8 comprises a fixed cylinder 801 , in which a rotating cylinder 811 is movably inserted. A spiral groove 804 is formed on the outer wall of the rotating cylinder 811 , and the rotating cylinder 811 can rotate in the fixed cylinder 801 .

[0021] The casing 72 is fixedly connected to the wheelchair frame 4, and the two movable sliders 74 are movably inserted into the inner wall of the casing 72. The top ends of the two movable sliders 74 are fixedly installed with first hinge seats 710, and the inner walls of the two first hinge seats 710 are rotatably installed with support plates 711. One end of the outer walls of the two support plates 711 are rotatably installed with second hinge seats 712, and the top ends of the two second hinge seats 712 are fixedly installed with lifting cushions 71. During the mutual movement of the two movable sliders 74, the lifting cushions 71 will be driven to rise and fall through the support plates 711.

[0022] The outer walls of the two armrests 5 are fixedly installed with fixing plates 9, and the tops of the two fixing plates 9 are penetrated by limiting slide grooves 10, and the inner walls of the two limiting slide grooves 10 are slidably connected with slide plates 713, and the two slide plates 713 are fixedly connected to the lifting cushion 71. The limiting slide grooves 10 provide a clear moving track for the slide plates 713, ensuring that the lifting cushion 71 can only move in a specific direction during the lifting process, preventing the lifting cushion 71 from offsetting, shaking or tilting during lifting, making the lifting process more stable and reliable. The outer wall of the casing 72 is fixedly installed with a motor 75, and the output end of the motor 75 penetrates the inner wall of the casing 72 and is fixedly connected to one end of the outer wall of the bidirectional screw 73.

[0023] Figure 1-Figure 7The second embodiment is shown, which is mainly different from the first embodiment in that: a first mounting plate 802 is fixedly installed on the outer wall of the fixed cylinder 801, and the first mounting plate 802 is fixedly connected to the handrail 5. A fixed sliding column 803 is fixedly inserted on the outer wall of the fixed cylinder 801, and the fixed sliding column 803 is movably inserted on the inner wall of the spiral slide groove 804. The fixed sliding column 803 limits the rotating cylinder 811 through the spiral slide groove 804, so that the rotating cylinder 811 rotates during the lifting process. At the same time, the spiral slide groove 804 is formed in a suitable shape so that the rotating cylinder 811 can be rotated and lifted to a suitable position. The bottom end of the rotating cylinder 811 is fixedly installed with a connecting rod 80 8. A connecting plate 809 is fixedly installed at the bottom end of the connecting rod 808, and a holding basket 810 is fixedly installed at the top end of the connecting plate 809. When the rotating cylinder 811 is lifted and rotated, the holding basket 810 is driven to move through the connecting rod 808 and the connecting plate 809. A second mounting plate 806 is fixedly installed on the outer wall of the armrest 5, and an electric push rod 807 is fixedly installed on the top end of the second mounting plate 806. A rotating block 805 is fixedly installed at the output end of the electric push rod 807. The rotating block 805 is rotatably connected to the rotating cylinder 811. The electric push rod 807 will drive the rotating cylinder 811 to rotate when it is extended and retracted, and the rotating block 805 will not limit the rotating cylinder 811 from rotating.

[0024] A battery pack 11 is fixedly mounted on the top of the base plate 1, and a controller 6 is fixedly mounted on the top of the armrest 5. The battery pack 11 is electrically connected to the controller 6. The battery pack 11 is electrically connected to the motor 75 and the two electric push rods 807 respectively. The battery pack 11 can provide power for the device. The controller 6 is electrically connected to the motor 75 and the two electric push rods 807 respectively. The controller 6 is mounted on the top of the armrest 5 so that the user can easily touch the controller 6 when operating the wheelchair. The motor 75 and the electric push rod 807 can be directly operated by the controller 6, and precise control of these components can be achieved.

[0025] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0026] During operation, when encountering a relatively rough road during driving, in order to prevent the device from rolling over, the motor 75 can be turned on, and the motor 75 drives the bidirectional screw 73 to rotate. The two movable sliders 74 on the bidirectional screw 73 move in opposite directions at the same time under the action of the threads, and the movable slider 74 then drives the two L-shaped frames 76, the spring shock absorbers 78 and the anti-rollover wheels 79 to move to both sides. When the wheelchair is subjected to lateral force, the anti-rollover wheels 79 provide additional lateral support force to offset part of the lateral force, reduce the roll angle, and improve the anti-rollover ability. Once an unstable situation occurs, the anti-rollover wheel 79 can be extended in time to provide additional support to protect the safety of the user. The spring shock absorber 78 can also reduce vibration and impact to improve the stability of driving. When the movable slider 74 moves to both sides, the movable slider 74 will drive the two support plates 711 to move away from each other. During the process of the two support plates 711 moving away from each other, the angle between the support plates 711 and the bidirectional screw 73 will decrease, thereby lowering the lifting cushion 71. At this time, the center of gravity of the driver on the device will be lowered, thereby further improving the stability of the device. The stability of the device on rough roads. When the holding basket 810 is needed to place items, the electric push rod 807 can be turned on. The electric push rod 807 drives the rotating cylinder 811 to rise. Since the spiral slide groove 804 and the fixed slide column 803 are provided, the spiral slide groove 804 is restricted by the fixed slide column 803, so that the rotating cylinder 811 rotates in the fixed cylinder 801 during the rising process. The rotating cylinder 811 drives the holding basket 810 to rise and rotate to the armrest 5 through the connecting rod 808 and the connecting plate 809, so as to facilitate the taking of items in the holding basket 810. When the holding basket 810 is not needed, it is only necessary to turn on the electric push rod 807 again. The electric push rod 807 drives the rotating cylinder 811 to descend, and then the holding basket 810 descends and rotates to the rear side of the wheelchair frame 4, thereby reducing the width of the device and preventing the holding basket 810 from colliding with other objects in a narrow environment.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric wheelchair suitable for use on multiple terrains, comprising a base plate (1), characterized in that: Two moving wheels (2) are rotatably mounted on the bottom end of the base plate (1), two universal wheels (3) are fixedly mounted on the bottom end of the base plate (1), a wheelchair frame (4) is fixedly mounted on the top end of the base plate (1), an anti-rollover component (7) is arranged at the bottom end of the wheelchair frame (4), two armrests (5) are fixedly mounted on the outer wall of the wheelchair frame (4), and a containing component (8) is arranged on the outer walls of the two armrests (5); The anti-rollover assembly (7) comprises a housing (72), a bidirectional screw (73) being rotatably mounted on the inner wall of the housing (72), two movable sliders (74) being threadedly connected to the outer wall of the bidirectional screw (73), an L-shaped frame (76) being fixedly mounted on the outer walls of the two movable sliders (74), a spring shock absorber (78) being fixedly mounted on one end of the outer walls of the two L-shaped frames (76), and an anti-rollover wheel (79) being fixedly mounted on the bottom ends of the two spring shock absorbers (78); The containing assembly (8) comprises a fixed cylinder (801), a rotating cylinder (811) being movably inserted into the fixed cylinder (801), and a spiral sliding groove (804) being provided on the outer wall of the rotating cylinder (811).

2. The electric wheelchair applicable to multiple terrains according to claim 1, characterized in that: The housing (72) is fixedly connected to the wheelchair frame (4); the two movable sliders (74) are movably inserted into the inner wall of the housing (72); the top ends of the two movable sliders (74) are fixedly mounted with a first hinge seat (710); the inner walls of the two first hinge seats (710) are rotatably mounted with a support plate (711); one end of the outer walls of the two support plates (711) are rotatably mounted with a second hinge seat (712); and the top ends of the two second hinge seats (712) are fixedly mounted with a lifting cushion (71).

3. The electric wheelchair applicable to multiple terrains according to claim 2, characterized in that: The outer walls of the two armrests (5) are fixedly mounted with fixing plates (9), the top ends of the two fixing plates (9) are penetrated with limiting slide grooves (10), the inner walls of the two limiting slide grooves (10) are slidably connected with slide plates (713), the two slide plates (713) are fixedly connected to the lifting cushion (71), and the outer wall of the housing (72) is fixedly mounted with a motor (75), the output end of the motor (75) penetrates the inner wall of the housing (72) and is fixedly connected to one end of the outer wall of the bidirectional screw (73).

4. The electric wheelchair applicable to multiple terrains according to claim 1, characterized in that: A first mounting plate (802) is fixedly mounted on the outer wall of the fixed cylinder (801), the first mounting plate (802) is fixedly connected to the handrail (5), a fixed sliding column (803) is fixedly inserted into the outer wall of the fixed cylinder (801), and the fixed sliding column (803) is movably inserted into the inner wall of the spiral sliding groove (804).

5. The electric wheelchair applicable to multiple terrains according to claim 1, characterized in that: A connecting rod (808) is fixedly mounted on the bottom end of the rotating cylinder (811), a connecting plate (809) is fixedly mounted on the bottom end of the connecting rod (808), and a containing basket (810) is fixedly mounted on the top end of the connecting plate (809).

6. The electric wheelchair applicable to multiple terrains according to claim 3, characterized in that: A second mounting plate (806) is fixedly mounted on the outer wall of the handrail (5); an electric push rod (807) is fixedly mounted on the top end of the second mounting plate (806); a rotating block (805) is fixedly mounted on the output end of the electric push rod (807); and the rotating block (805) is rotatably connected to the rotating cylinder (811).

7. The electric wheelchair applicable to multiple terrains according to claim 6, characterized in that: A battery pack (11) is fixedly mounted on the top of the base plate (1), a controller (6) is fixedly mounted on the top of the armrest (5), the battery pack (11) is electrically connected to the controller (6), and the battery pack (11) is electrically connected to the motor (75) and the two electric push rods (807), respectively.

8. The electric wheelchair applicable to multiple terrains according to claim 7, characterized in that: The controller (6) is electrically connected to the motor (75) and the two electric push rods (807) respectively.

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