High-stability anti-rollover electric wheelchair

Abstract

A high-stability anti-rollover electric wheelchair comprises an electric wheelchair body. The electric wheelchair body comprises a base, a seat, a controller, a battery box, pedals, rear wheels and front wheels. A middle plate is fixed to the top of the base. Anti-rollover structures are arranged on the left side and the right side of the middle plate. The anti-rollover structure comprises a transverse plate, a vertical plate, a telescopic rod, a side wheel and a driving structure. And a cavity is formed in the vertical plate. And a worm is rotationally connected in the cavity. The telescopic rod comprises an inner rod and an outer sleeve. And a sliding cavity is formed in the inner rod. A first sliding groove is formed in the outer side wall of the inner rod. A first lead screw is rotationally connected into the sliding cavity. And a worm gear is fixed on the first screw rod. The first lead screw is sleeved with a first nut base. And a first sliding block is fixed on the first nut. The driving structure is arranged on the transverse plate and the vertical plate and used for driving the first lead screw to rotate. The electric wheelchair can stably run on a bumpy non-paved road surface, and the electric wheelchair body is prevented from rolling over.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchairs, and in particular to a high-stability anti-rollover electric wheelchair. Background Art

[0002] Electric wheelchairs are a new generation of intelligent wheelchairs that are modified and upgraded based on traditional manual wheelchairs by adding high-performance power drive devices, intelligent control devices, batteries and other components. They are equipped with manually operated intelligent controllers and can drive the wheelchair to complete various functions such as forward, backward, turning, standing, lying down, etc. They are high-tech products that combine modern precision machinery, intelligent CNC, engineering mechanics and other fields.

[0003] However, although the existing electric wheelchairs are highly intelligent, they have poor anti-rollover performance. When passing through unpaved roads such as gravel and cement, they are prone to rollover due to the uneven potholes on the road, causing injuries to the user.

[0004] The Chinese patent with authorization announcement number CN111643286B discloses a self-balancing electric wheelchair, including a base from bottom to top, a rotating lifting platform and a supporting conveying platform. The base includes a walking mechanism for adjusting the position of the base; the rotating lifting platform includes a lifting mechanism for adjusting the vertical height position and a rotating mechanism for adjusting the angle in the horizontal plane; the supporting conveying platform includes a supporting mechanism for supporting the human body and a conveying mechanism for pushing the supporting mechanism toward one side or retracting it. During the transfer process from the wheelchair to the bed, when the center of gravity of the conveying mechanism is offset, the counterweight block is extended or retracted in the opposite direction of the extension and retraction of the support mechanism, dynamically adjusting the lateral balance of the wheelchair to prevent the wheelchair from tipping over; the human body is transported to the bed surface through the conveying mechanism and the transmission mechanism, better realizing the automatic getting in and out of bed function; it is flexible and convenient to use.

[0005] Chinese patent application number CN104800009B discloses a forward-folding, anti-rollover electric wheelchair comprising a wheelchair frame, an armrest assembly, a locking assembly, a storage bag, and an anti-rollover frame. The wheelchair frame comprises an upper backrest, a lower backrest, a seat frame, a front frame, and a rear frame. The armrest assembly comprises an armrest tube, an armrest support block, and an armrest support tube. The storage bag is positioned below the seat frame. The anti-rollover frame comprises an anti-rollover frame body and auxiliary rollers disposed on either side of the anti-rollover frame body. The front hinge hole of the anti-rollover frame body connects to the lower hinge hole of the lower backrest, forming a first linkage structure. When the electric wheelchair is folded, the anti-rollover frame folds forward. This electric wheelchair is safe and easy to use. The anti-rollover frame prevents the electric wheelchair from tipping over, and the anti-rollover frame can be linked to the folding of the electric wheelchair, facilitating its folding and use. Furthermore, this forward-folding, anti-rollover electric wheelchair also features a storage bag, effectively expanding the electric wheelchair's functionality.

[0006] At the same time, the present invention also proposes a new technical solution, which aims to solve the problem that the electric wheelchair in the existing technology has poor anti-rollover performance and is prone to rollover when passing through bumpy roads or unpaved roads, causing harm to the user. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a high-stability anti-rollover electric wheelchair, which is designed to be able to travel smoothly on bumpy and unpaved roads and prevent the electric wheelchair body from rolling over.

[0008] A highly stable and anti-rollover electric wheelchair comprises an electric wheelchair body, the electric wheelchair body comprising a base, a seat, a controller, a battery box, footrests, rear wheels and front wheels, an intermediate plate being fixed to the top of the base, and anti-rollover structures being provided on the left and right sides of the intermediate plate, the anti-rollover structure comprising a horizontal plate, a vertical plate, a telescopic rod, side wheels and a drive structure, one side of the horizontal plate being connected to the intermediate plate, the vertical plate being fixed to the bottom end of the horizontal plate, a cavity being provided inside the vertical plate, a worm being rotatably connected between the front and rear cavity walls of the cavity via a bearing, the telescopic rod comprising an inner rod and an outer sleeve, the inner rod being fixed to the side of the vertical plate facing away from the base, a sliding cavity being provided inside the inner rod, and a groove communicating with the sliding cavity and extending laterally left and right is provided on the upper and lower outer side walls of the inner rod. The worm gear of the first gear is connected with the worm gear of the first gear by the guide rail, and the worm gear of the first gear is connected with the guide rail by the guide rail.

[0009] By adopting the above technical solution, when driving on a bumpy, unpaved road, the first screw is driven to rotate by the drive structure. The first screw drives the first nut seat to slide along the sliding cavity. The first nut seat drives the first slider to slide along the first slide groove. The first slider drives the outer sleeve to slide along the inner rod. The outer sleeve drives the side wheel to move away from the base. This increases the contact area between the electric wheelchair body and the ground, preventing the electric wheelchair body from tipping over due to an unstable bottom. The present invention can smoothly travel on bumpy, unpaved roads and prevent the electric wheelchair body from tipping over.

[0010] Preferably, the driving structure includes a cover body, a mounting slot, a first motor, a driving wheel and a driven wheel, the cover body is fixed to the front side of the horizontal plate and the vertical plate, the mounting slot is opened at the top of the horizontal plate, the first motor is installed inside the mounting slot, and a driving shaft that is concentric and coaxial with the output shaft of the first motor is fixed, the other end of the driving shaft penetrates into the cover body and is rotatably connected to the inner side wall of the cover body through a bearing, one end of the worm is fixed with a driven shaft that is concentric and coaxial with the worm, the other end of the driven shaft penetrates into the cover body and is rotatably connected to the inner side wall of the cover body through a bearing, the driving wheel and the driven wheel are both located in the cover body and are fixedly sleeved on the outside of the driving shaft and the worm, and the driving wheel and the driven wheel are connected by a transmission belt.

[0011] By adopting the above technical solution, when the first screw needs to be rotated, the first motor is started, and the output shaft of the first motor rotates, driving the driving shaft. The driving shaft then rotates the driving wheel. The driving wheel then rotates the driven wheel via a transmission belt. The driven wheel then rotates the driven shaft. The driven shaft then rotates the worm. The worm then rotates the worm wheel meshing with it. The worm wheel then rotates the first screw.

[0012] Preferably, the two transverse plates are both slidably connected to the middle plate, and a lifting structure is provided in the middle plate and the base for driving the two anti-rollover structures to move up and down at the same time. The lifting structure includes an installation cavity, a through slot, an electric cylinder and a lifting plate. The through slot is provided on the middle plate and passes through the middle plate horizontally from left to right. The lifting plate is located in the through slot and slides up and down along the through slot, and its left and right ends are respectively fixedly connected to the two transverse plates. The installation cavity is provided in the base, and the electric cylinder is installed in the installation cavity, and its piston rod vertically penetrates into the through slot and is fixedly connected to the lifting plate.

[0013] By adopting this technical solution, before the telescopic rod is extended or retracted, the electric cylinder is first activated. The piston rod of the electric cylinder extends, driving the lifting plate upward along the through slot. The lifting plate drives the two horizontal plates upward simultaneously, thereby simultaneously moving the left and right side wheels upward. This frees the side wheels from contact with the ground. The telescopic rod is then extended or retracted, ensuring smooth left and right side wheel movement.

[0014] Preferably, the lifting plate is provided with a channel extending horizontally to the left and right and passing through the lifting plate, and openings corresponding to the channels are provided on opposite sides of the two horizontal plates, and the two driving shafts pass through the two openings respectively, and linkage wheels are fixedly sleeved on the outside of the two driving shafts, and the two linkage wheels are connected by a transmission belt.

[0015] By adopting the above technical solution, the first motor is started, and the output shaft of the first motor drives one of the driving shafts to rotate. The driving shaft drives the interlocking wheel on it to rotate, and the interlocking wheel drives the other interlocking wheel via the transmission belt, thereby rotating the other driving shaft at the same time. With a single motor, two telescopic rods can be simultaneously extended and retracted.

[0016] Preferably, a second slide groove extending horizontally forward and backward is opened at the top of the middle plate, and a second screw rod is rotatably connected between the front and rear side groove walls of the second slide groove through a bearing, and a second nut seat is threadedly sleeved on the outside of the second screw rod, and the second nut seat slides forward and backward along the second slide groove, and its top end passes through the second slide groove and is fixedly connected to the bottom end of the seat, and a second motor for driving the second screw rod to rotate is installed on the outer side wall of the middle plate.

[0017] By adopting the above technical solution, when driving on an uphill road, the second motor is activated, driving the second screw to rotate. The second screw drives the second nut seat to slide forward along the second slide groove. The second nut seat drives the seat to slide forward, thereby shifting the user's center of gravity forward and preventing backward tipping during driving. Similarly, when driving on a downhill road, the output shaft of the second motor rotates in the opposite direction, driving the seat backward, shifting the user's center of gravity backward and preventing forward tipping during driving.

[0018] Preferably, a triangular mounting bracket is fixed on the outer sleeve, and the side wheel is mounted on the triangular mounting bracket.

[0019] By adopting the above technical solution and setting the triangular mounting bracket, the stability of the side wheel is improved.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] A highly stable, rollover-resistant electric wheelchair, when traveling on a bumpy, unpaved road, rotates a first screw via a drive structure. The first screw drives the first nut seat to slide along the slide cavity. The first nut seat drives the first slider to slide along the first slide groove. The first slider drives the outer sleeve to slide along the inner rod. The outer sleeve drives the side wheel to move away from the base. This increases the contact area between the electric wheelchair body and the ground, preventing the electric wheelchair body from rolling over due to an unstable bottom. The present invention can travel smoothly on bumpy, unpaved roads, preventing the electric wheelchair body from rolling over. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a high-stability anti-rollover electric wheelchair according to the present invention;

[0023] Figure 2 A partial cross-sectional view of a high-stability anti-rollover electric wheelchair according to the present invention, viewed from the main direction;

[0024] Figure 3 This is a side view of a high-stability anti-rollover electric wheelchair of the present invention. Figure 1 ;

[0025] Figure 4 This is a cross-sectional view from above of a high-stability anti-rollover electric wheelchair according to the present invention;

[0026] Figure 5 This is a side view of a high-stability anti-rollover electric wheelchair of the present invention. Figure 2 .

[0027] Reference numerals: 1, base; 2, seat; 3, battery box; 4, footrest; 5, rear wheel; 6, front wheel; 7, second slide; 8, second screw rod; 9, second nut seat; 10, second motor; 11, through slot; 12, lifting plate; 13, passage; 14, horizontal plate; 15, vertical plate; 16, cover; 17, opening; 18, driving shaft; 19, driving wheel; 20, cavity; 21, worm; 22, driven shaft; 23. Driven wheel; 24. First transmission belt; 25. Inner rod; 26. Outer sleeve; 27. Sliding cavity; 28. First sliding groove; 29. ​​First screw rod; 30. Worm gear; 31. First nut seat; 32. First slider; 33. Triangular mounting bracket; 34. Side wheel; 35. Mounting cavity; 36. Electric cylinder; 37. Mounting groove; 38. First motor; 39. Interlocking wheel; 40. Second transmission belt; 41. Middle plate. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0029] A high stability anti-rollover electric wheelchair, such as Figures 1-5 As shown, the electric wheelchair comprises a base 1, a seat 2, a controller, a battery box 3, a drive motor, pedals 4, rear wheels 5 and front wheels 6.

[0030] The base 1, seat 2, controller, battery box 3, pedal 4, rear wheel 5 and front wheel 6 are all extremely mature existing technologies and will not be described in detail in this embodiment.

[0031] Reference URL:

[0032] https: / / baike.baidu.com / item / %E7%94%B5%E5%8A%A8%E8%BD%AE%E6%A4%85 / 3585300?fr=aladdin.

[0033] You can also refer to the website:

[0034] https: / / www.zhihu.com / question / 594969915 / answer / 3292784684?utm_id=0.

[0035] You can also refer to GB / T 12996-2024 "Electric Wheelchair".

[0036] An intermediate plate 41 is fixed to the top of the base 1 .

[0037] A second chute 7 extending transversely forward and backward is formed at the top of the middle plate 41. A second screw 8 is rotatably connected between the front and rear side walls of the second chute 7 via a bearing. A second nut seat 9 is threadedly sleeved on the outside of the second screw 8. The second nut seat 9 slides forward and backward along the second chute 7 (i.e., the outer side wall of the second nut seat 9 fits against the wall of the second chute 7), and its top end passes through the second chute 7 and is fixedly connected to the bottom end of the seat 2. A second motor 10 for driving the second screw 8 to rotate is mounted on the outer side wall of the middle plate 41.

[0038] The middle plate 41 is also provided with a through slot 11, located below the second chute 7, extending transversely from side to side through the middle plate 41. A lifting plate 12 is slidably connected within the through slot 11, and moves up and down along the through slot 11. The lifting plate 12 is provided with a channel 13 extending transversely from side to side and extending through the lifting plate 12.

[0039] The left and right ends of the lifting plate 12 pass through the through slots 11 and are fixed with anti-rollover structures. The anti-rollover structure includes a horizontal plate 14 fixed to the lifting plate 12, a vertical plate 15 fixed to the bottom end of the horizontal plate 14, and a cover 16 fixed to the front sides of the horizontal plate 14 and the vertical plate 15.

[0040] An opening 17 corresponding to the passage 13 is formed on the side of the horizontal plate 14 near the lifting plate 12. A driving shaft 18 is rotatably connected within the opening 17. The driving shaft 18 passes through the housing 16 and is rotatably connected to the inner wall of the housing 16 via a bearing. A driving pulley 19, located within the housing 16, is fixedly sleeved on the outside of the driving shaft 18.

[0041] A cavity 20 is defined within the riser 15. A worm 21 is rotatably connected between the front and rear walls of the cavity 20 via bearings. A driven shaft 22, coaxially and concentrically mounted therewith, is secured to one end of the worm 21. The other end of the driven shaft 22 extends into the housing 16 and is rotatably connected to the inner wall of the housing 16 via a bearing. A driven pulley 23, located within the housing 16, is fixedly sleeved on the outside of the driven shaft 22. A first transmission belt 24 is connected between the driving pulley 19 and the driven pulley 23.

[0042] A telescopic rod is provided on the vertical plate 15. The telescopic rod includes an inner rod 25 and an outer sleeve 26. The inner rod 25 is fixed to the side of the vertical plate 15 facing away from the base 1. A sliding cavity 27 is defined within the inner rod 25. A first sliding groove 28 is defined on both the upper and lower outer walls of the inner rod 25, extending horizontally from side to side and communicating with the sliding cavity 27. A first screw rod 29 is rotatably connected between the left and right walls of the sliding cavity 27 via a bearing. One end of the first screw rod 29 extends into the cavity 20 and is fixed with a worm wheel 30 that meshes with the worm 21. A first nut seat 31 is threadedly mounted on the outside of the first screw rod 29. The outer wall of the first nut seat 31 engages with the wall of the sliding cavity 27, and the first nut seat 31 slides along the sliding cavity 27. A first slider 32 is fixed to the outer wall of the first nut, which slides left and right along the first sliding groove 28. The outer wall of the first slider 32 engages with the groove wall of the first sliding groove 28. The end of the first slider 32 facing away from the first nut seat 31 passes through the first slide groove 28 and out of the slide cavity 27. The outer sleeve 26 is slidably mounted on the exterior of the inner rod 25. The inner sidewall of the outer sleeve 26 is fixedly connected to the end of the first slider 32 that passes through the slide cavity 27. A triangular mounting bracket 33 is fixed to the end of the outer sleeve 26 facing away from the base 1. A side wheel 34 is rotatably connected to the triangular mounting bracket 33 via a pin. The bottom end of the side wheel 34 is flush with the front wheel 6 and the rear wheel 5.

[0043] A mounting cavity 35 is provided in the base 1. An electric cylinder 36 is installed in the mounting cavity 35. The piston rod of the electric cylinder 36 vertically penetrates into the through groove 11 and is fixedly connected to the lifting plate 12.

[0044] A mounting slot 37 is defined at the top of one of the two horizontal plates 14. A first motor 38 is mounted within the mounting slot 37, driving the drive shaft 18 within the horizontal plate 14. Both drive shafts 18 are also secured with interlocking pulleys 39 positioned within the opening 17. A second transmission belt 40 is connected between the interlocking pulleys 39. The second transmission belt 40 passes through the channel 13 and connects between the two interlocking pulleys 39.

[0045] Working principle:

[0046] When driving on a bumpy, unpaved road, the electric cylinder 36 is first activated. The piston rod of the electric cylinder 36 extends, driving the lifting plate 12 upward along the through slot 11. The lifting plate 12 drives the two cross plates 14 upward simultaneously, thereby causing the left and right side wheels 34 to move upward simultaneously, so that the side wheels 34 no longer contact the ground.

[0047] The first motor 38 is then started. The output shaft of the first motor 38 rotates, driving the driving shaft 18. This driving shaft 18 rotates the interlocking pulley 39 mounted thereon. This interlocking pulley 39, in turn, rotates another interlocking pulley 39 via the second transmission belt 40. The other interlocking pulley 39 then rotates the other driving shaft 18, thereby achieving synchronous rotation of the two driving shafts 18. The rotation of the driving shaft 18 in turn drives the driving pulley 19. The driving pulley 19 rotates the driven pulley 23 via the first transmission belt 24. The driven pulley 23 rotates the driven shaft 22. The driven shaft 22 rotates the worm 21. The worm 21 rotates the worm wheel 30 meshing with it. The worm wheel 30 rotates the first lead screw 29. The first lead screw 29 drives the first nut seat 31 to slide along the sliding cavity 27. The first nut seat 31 drives the first slider 32 to slide along the first sliding groove 28. The first slider 32 drives the outer sleeve 26 to slide along the inner rod 25. The outer sleeve 26 drives the side wheel 34 to move away from the base 1. By extending the telescopic rod, the contact area between the electric wheelchair and the ground is increased, preventing the electric wheelchair from tipping over due to an unstable bottom. The extension distance of the telescopic rod can also be controlled according to the potholes in the road.

[0048] When driving uphill, the second motor 10 is activated, rotating the second screw 8. The second screw 8 drives the second nut holder 9 to slide forward along the second slide groove 7. The second nut holder 9 drives the seat 2 forward, thereby shifting the user's center of gravity forward and preventing the vehicle from tipping over during driving. Similarly, when driving downhill, the output shaft of the second motor 10 rotates in the opposite direction, driving the seat 2 backward and shifting the user's center of gravity backward, preventing the vehicle from tipping over during driving.

[0049] The electric wheelchair can travel smoothly on bumpy and uneven non-paved roads, preventing the electric wheelchair body from rolling over. It can also travel stably when going up and down slopes, avoiding overturning when going up and down slopes.

[0050] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected internally between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0052] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0053] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A high-stability anti-rollover electric wheelchair, comprising an electric wheelchair body, wherein the electric wheelchair body comprises a base (1), a seat (2), a controller, a battery box (3), a drive motor, pedals (4), rear wheels (5) and front wheels (6), characterized in that: An intermediate plate (41) is fixed to the top of the base (1), and an anti-rollover structure is provided on both the left and right sides of the intermediate plate (41), and the anti-rollover structure includes a horizontal plate (14), a vertical plate (15), a telescopic rod, a side wheel (34) and a driving structure. One side of the horizontal plate (14) is connected to the intermediate plate (41), and the vertical plate (15) is fixed to the bottom end of the horizontal plate (14). A cavity (20) is provided inside the vertical plate (15), and a cavity (20) is provided between the front and rear walls of the cavity (20). A worm (21) is rotatably connected to the telescopic rod via a bearing. The telescopic rod comprises an inner rod (25) and an outer sleeve (26). The inner rod (25) is fixed to a side of the vertical plate (15) away from the base (1). A sliding cavity (27) is provided inside the inner rod (25). The upper and lower outer side walls of the inner rod (25) are both provided with a first sliding groove (28) which is in communication with the sliding cavity (27) and extends laterally to the left and right. A first screw rod is rotatably connected between the left and right side walls of the sliding cavity (27) via a bearing. (29), one end of the first screw rod (29) penetrates into the cavity (20), and is fixed with a worm wheel (30) meshing with the worm (21), the outside of the first screw rod (29) is sleeved with a first nut seat (31) in a threaded connection manner, and a first slider (32) is fixed on the outer wall of the first nut, which slides left and right along the first slide groove (28), and the end of the first slider (32) that is away from the first nut seat (31) passes through the slide cavity (27) through the first slide groove (28), The outer sleeve (26) is slidably mounted on the outside of the inner rod (25), and the inner side wall of the outer sleeve (26) is fixedly connected to one end of the first slider (32) that passes through the sliding cavity (27). The side wheel (34) is rotatably connected to the end of the outer sleeve (26) that is away from the vertical plate (15) through a pin shaft. The bottom end of the side wheel (34) is flush with the front wheel (6) and the rear wheel (5). The driving structure is arranged on the horizontal plate (14) and the vertical plate (15) to drive the first screw rod (29) to rotate.

2. The high-stability anti-rollover electric wheelchair according to claim 1, characterized in that: The driving structure comprises a cover (16), a mounting groove (37), a first motor (38), a driving wheel (19) and a driven wheel (23); the cover (16) is fixed to the front side of the transverse plate (14) and the vertical plate (15); the mounting groove (37) is opened at the top of the transverse plate (14); the first motor (38) is installed inside the mounting groove (37); a driving shaft (18) arranged concentrically and coaxially with the first motor (38) is fixed on the output shaft of the first motor (38); the other end of the driving shaft (18) penetrates into the cover (16) The worm (21) is connected to the inner wall of the housing (16) through a bearing for rotation. One end of the worm (21) is fixed with a driven shaft (22) which is coaxially and concentrically arranged with the worm. The other end of the driven shaft (22) penetrates into the housing (16) and is connected to the inner wall of the housing (16) through a bearing for rotation. The driving wheel (19) and the driven wheel (23) are both located in the housing (16) and are fixedly sleeved on the outside of the driving shaft and the worm (21) respectively. The driving wheel (19) and the driven wheel (23) are connected through a transmission belt.

3. The high-stability anti-rollover electric wheelchair according to claim 2, characterized in that: The two transverse plates (14) are both slidably connected to the middle plate (41); a lifting structure for driving the two anti-rollover structures to move up and down simultaneously is provided in the middle plate (41) and the base (1); the lifting structure comprises a mounting cavity (35), a through slot (11), an electric cylinder (36) and a lifting plate (12); the through slot (11) is provided on the middle plate (41) and passes through the middle plate (41) horizontally from left to right; the lifting plate (12) is located in the through slot (11) and slides up and down along the through slot (11); and its left and right ends are respectively fixedly connected to the two transverse plates (14); the mounting cavity (35) is provided in the base (1); the electric cylinder (36) is installed in the mounting cavity (35), and its piston rod vertically penetrates the through slot (11) and is fixedly connected to the lifting plate (12).

4. The high-stability anti-rollover electric wheelchair according to claim 3, characterized in that: The lifting plate (12) is provided with a channel (13) extending horizontally to the left and right and penetrating the lifting plate (12); openings (17) corresponding to the channel (13) are provided on opposite sides of the two transverse plates (14); the two driving shafts (18) pass through the two openings (17) respectively, and the exteriors of the two driving shafts (18) are fixedly sleeved with linkage wheels (39); the two linkage wheels (39) are connected by a transmission belt.

5. The high-stability anti-rollover electric wheelchair according to claim 4, characterized in that: The top of the intermediate plate (41) is provided with a second slide groove (7) extending transversely forward and backward, and a second screw rod (8) is rotatably connected between the front and rear side groove walls of the second slide groove (7) through a bearing, and a second nut seat (9) is sleeved on the outside of the second screw rod (8) in a threaded connection manner, and the second nut seat (9) slides forward and backward along the second slide groove (7), and its top end passes through the second slide groove (7) and is fixedly connected to the bottom end of the seat (2), and a second motor (10) for driving the second screw rod (8) to rotate is installed on the outer wall of the intermediate plate (41).

6. The high-stability anti-rollover electric wheelchair according to claim 1, characterized in that: A triangular mounting bracket (33) is fixed on the outer sleeve (26), and the side wheel (34) is mounted on the triangular mounting bracket (33).

Images