An electric wheelchair chassis with a telescopic anti-tipping structure and easy directional control.

Abstract

This utility model discloses an electric wheelchair chassis with a telescopic anti-tipping structure and easy directional control. It includes a chassis body, a first adjustment bracket, a second adjustment bracket, a third adjustment bracket, a fourth adjustment bracket, a fifth adjustment bracket, a sixth adjustment bracket, a seventh adjustment bracket, an eighth adjustment bracket, and a manual pivot. A footrest is positioned at the center of the front end of the chassis body. Front wheels are movably mounted on both sides of the front end of the chassis body, and rear wheels are movably mounted on both sides of the rear end of the chassis body. This electric wheelchair chassis with a telescopic anti-tipping structure and easy directional control allows for free switching between manual and automatic steering. Switching to manual steering provides a more youthful experience, supports multiple modes, automatically reduces power during turns for enhanced safety, and the added anti-tipping structure effectively prevents tipping over, further improving driving safety.

Description

Technical Field

[0001] This utility model relates to the field of electric wheelchairs and mobility scooters, and in particular to an electric wheelchair chassis with a telescopic anti-tipping structure that facilitates directional control. Background Technology

[0002] Electric wheelchairs are a type of support device that enables some elderly people to move around. They can be driven manually or automatically by a motor. They are intelligent, high-end mobility devices suitable for the elderly, enabling them to travel at a constant speed on flat ground and up and down slopes. They can also intelligently adjust the seat posture to provide a safe and comfortable travel experience for people with mobility impairments.

[0003] Existing electric wheelchair chassis have certain drawbacks. First, they cannot switch between automatic and manual operation, resulting in a less than satisfactory user experience and hindering usability. Second, they generally lack anti-tipping mechanisms, which can cause the wheelchair to tip backward when tilted at excessive angles or with excessive force, negatively impacting usability. To address these issues, we propose an electric wheelchair chassis with a telescopic anti-tipping structure that facilitates directional control. Utility Model Content

[0004] Technical problem solved: In view of the shortcomings of the existing technology, this utility model provides an electric wheelchair chassis with a telescopic anti-rollover structure and easy directional control. It can freely switch between manual and automatic steering control. Switching to manual steering control provides a youthful experience and meets multiple modes. Power is automatically reduced when turning, making driving safer. The addition of the anti-rollover structure has an anti-rollover effect, making driving safer and effectively solving the problems in the background technology.

[0005] Technical Solution: To achieve the above objectives, the technical solution adopted by this utility model is as follows: an electric wheelchair chassis with a telescopic anti-tipping structure and easy directional control, comprising a chassis body, a first adjustment bracket, a second adjustment bracket, a third adjustment bracket, a fourth adjustment bracket, a fifth adjustment bracket, a sixth adjustment bracket, a seventh adjustment bracket, an eighth adjustment bracket, and a manual rotating shaft. A foot pedal is positioned at the center of the front end of the chassis body. Front wheels are movably mounted on both sides of the front end of the chassis body, and rear wheels are movably mounted on both sides of the rear end of the chassis body. A rotary motor, an output gear, and a controller are installed near the center of the interior of the chassis body. A walking motor is installed near the rear end of the interior of the chassis body. An eighth adjustment bracket is movably mounted at the bottom of the chassis body, below the output gear. A rack is fixed on the eighth adjustment bracket at a position corresponding to the output gear. The rack meshes with the output gear, and the output gear drives the rack and the eighth adjustment bracket to move laterally. A front bearing seat is installed at the front end of the eighth adjustment bracket connected to the bottom of the chassis body. A rear bearing seat is installed at the rear end of the eighth adjustment bracket connected to the bottom of the chassis body. A second adjustment bracket is provided on the manual rotating shaft. A first adjustment bracket is connected between the second and eighth adjustment brackets. A front wheel frame is installed on the inner side of the front wheel. One end of the third adjustment bracket is welded and fixed to the front wheel frame. A fourth adjustment bracket is connected to the rear end of the eighth adjustment bracket at the rear bearing seat. A sixth and fifth adjustment brackets are connected to the rear end of the fourth adjustment bracket. A drive shaft and a seventh adjustment bracket are provided on the inner side of the rear wheel. Both the sixth and fifth adjustment brackets are connected to the seventh adjustment bracket. The front and rear wheels have a reversible structure. The chassis body has two modes of use: the first mode is an automatic steering wheelchair mode, in which the rotary motor is working; the second mode is a manual steering mobility scooter mode, in which the rotary motor is not working.

[0006] Preferably, a foolproof mechanism is fixed between the second adjusting bracket and the manual rotating shaft. A first rotation point is set between the manual rotating shaft and the chassis body. The second adjusting bracket is located below the first adjusting bracket, and the eighth adjusting bracket is located above the first adjusting bracket. A first oblong-shaped slot is formed on the second adjusting bracket, and a third oblong-shaped slot is formed on the eighth adjusting bracket. Two sets of bearings are positioned in the middle of the first adjusting bracket and are respectively fixed to the upper and lower end faces of the center position of the first adjusting bracket. The bearing on the upper end face is located inside the third oblong-shaped slot and moves, while the bearing on the lower end face is located inside the first oblong-shaped slot and moves. A third rotation point is set between the midpoint of the connection between the third adjusting bracket and the front wheel frame and the chassis body. A first linear bearing is set between the eighth adjusting bracket and the front bearing seat. A second linear bearing is provided between the adjusting bracket and the rear bearing housing. A second oblong-shaped groove is provided on the fourth adjusting bracket. A ball bearing is positioned at the second oblong-shaped groove on the eighth adjusting bracket, and the ball bearing slides in the second oblong-shaped groove. A second rotation point is provided between the first and third adjusting brackets. A fourth rotation point is provided between the fourth and sixth adjusting brackets. A fifth rotation point is provided between the fourth and fifth adjusting brackets. An eighth rotation point is provided between the sixth and seventh adjusting brackets. A seventh rotation point is provided between the fifth and seventh adjusting brackets. A central rotation shaft is provided between the seventh adjusting bracket and the chassis body. A rear wheel bracket is provided between the seventh adjusting bracket and the rear wheel. A sixth rotation point is provided between the fourth adjusting bracket and the chassis body.

[0007] Preferably, when the chassis body is in automatic steering wheelchair mode, the controller controls the rotary motor and drives the output gear to rotate. The output gear drives the eighth adjustment bracket to move left and right on the rack. The eighth adjustment bracket drives the first adjustment bracket and the fourth adjustment bracket to move left and right, thereby causing the front wheel and the rear wheel to turn in opposite directions.

[0008] Preferably, when the chassis body is in use as a manually controlled steering mobility vehicle, the manual pivot shaft drives the position of the second adjustment bracket to rotate around the first rotation point. The second adjustment bracket drives the positions of the first adjustment bracket, the eighth adjustment bracket, the fourth adjustment bracket, the sixth adjustment bracket, the fifth adjustment bracket, and the seventh adjustment bracket to move, and drives the front wheels and rear wheels to reverse.

[0009] Preferably, the manual rotating shaft drives the second adjusting bracket for synchronous adjustment via a foolproof mechanism; the third adjusting bracket is welded and positioned to the front wheel frame, and the third adjusting bracket and the front wheel frame rotate around a third rotation point relative to the chassis body; the eighth adjusting bracket slides parallel to the front bearing seat via a first linear bearing; the eighth adjusting bracket slides parallel to the rear bearing seat via a second linear bearing; the eighth adjusting bracket rotates with the fourth adjusting bracket via a second oblong groove; the first adjusting bracket rotates with the third adjusting bracket via a second rotation point; the fourth adjusting bracket rotates with the sixth adjusting bracket via a fourth rotation point; the fourth adjusting bracket rotates with the fifth adjusting bracket via a fifth rotation point; the sixth adjusting bracket rotates with the seventh adjusting bracket via an eighth rotation point; the fifth adjusting bracket rotates with the seventh adjusting bracket via a seventh rotation point; the seventh adjusting bracket is adjusted to the rear wheel via the rear wheel frame; and the seventh adjusting bracket rotates around a central rotation axis at the bottom of the chassis body.

[0010] Preferably, a positioning frame is installed at the bottom of the chassis body near the inner side of the rear wheel. An anti-rollover frame is provided at the bottom of the positioning frame. The anti-rollover frame has a locking groove and a movable groove in the middle. An anti-rollover support wheel is provided at the rear end of the anti-rollover frame. A limit rod is provided at the movable groove. A limit ball is integrally formed at the top of the limit rod. A spring assembly is provided on the outer wall of the limit rod. A limit slide groove is provided at the front end of the anti-rollover frame. A pin is provided at the lower end of the positioning frame. The pin is located inside the limit slide groove. The limit ball is engaged inside the locking groove for positioning. When the anti-rollover frame is pressed down, the limit ball is disengaged from the locking groove. At this time, the anti-rollover frame can retract and fold forward. The pin moves inside the limit slide groove.

[0011] Beneficial Effects: Compared with the prior art, this utility model provides an electric wheelchair chassis with a telescopic anti-rollover structure and easy directional control, which has the following beneficial effects: This electric wheelchair chassis with a telescopic anti-rollover structure and easy directional control can freely switch between manual and automatic steering. Switching to manual steering provides a youthful experience, satisfies multiple modes, automatically reduces power when turning, making driving safer, and the added anti-rollover structure has an anti-rollover effect, making driving safer. When the chassis body is in automatic steering wheelchair mode, the controller controls the rotary motor and drives the output gear to rotate, and the output gear drives the eighth... The adjustment bracket moves left and right on the rack. The eighth adjustment bracket drives the first and fourth adjustment brackets to move left and right, thereby causing the front and rear wheels to turn in opposite directions. When the chassis is in manual steering mode, the manual pivot rotates the second adjustment bracket around the first rotation point. The second adjustment bracket then drives the first, eighth, fourth, sixth, fifth, and seventh adjustment brackets to move, causing the front and rear wheels to reverse. The entire electric wheelchair is simple in structure, easy to operate, and more effective than traditional methods. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an electric wheelchair chassis with a telescopic anti-tipping structure and easy directional control according to the present invention.

[0013] Figure 2 This is a schematic diagram of the upper part of the chassis of an electric wheelchair chassis with a telescopic anti-tipping structure that facilitates directional control, according to this utility model.

[0014] Figure 3 This is a schematic diagram of the structure of an electric wheelchair chassis with a telescopic anti-tipping structure that facilitates directional control, with an added anti-tipping frame.

[0015] Figure 4 This is a schematic diagram of the enlarged view of point A in the chassis of an electric wheelchair with a telescopic anti-tipping structure that facilitates directional control, according to this utility model.

[0016] Figure 5 This is a structural schematic diagram of point B in the chassis of an electric wheelchair with a telescopic anti-tipping structure that facilitates directional control, according to this utility model.

[0017] Figure 6 This is a schematic diagram of the anti-tipping frame main body in the chassis of an electric wheelchair with a telescopic anti-tipping structure that facilitates directional control, according to this utility model.

[0018] Figure 7This is a schematic diagram of the anti-tipping frame in the extended state of the chassis of an electric wheelchair with a telescopic anti-tipping structure that facilitates directional control.

[0019] Figure 8 This is a schematic diagram of the anti-tipping frame in the retracted state of an electric wheelchair chassis with a telescopic anti-tipping structure that facilitates directional control, according to this utility model.

[0020] In the diagram: 1. Chassis body; 2. Second oblong-shaped groove; 3. Second linear bearing; 4. Rack; 5. Third adjusting bracket; 6. Third rotation point; 7. Front wheel; 8. Front wheel bracket; 9. First oblong-shaped groove; 10. Second adjusting bracket; 11. Foot pedal; 12. Foolproof mechanism; 13. Manual pivot; 14. Third oblong-shaped groove; 15. First linear bearing; 16. First adjusting bracket; 17. Front bearing housing; 18. Second rotation point; 19. Eighth adjusting bracket; 20. Rear bearing housing; 21. Fourth rotation point; 22. Seventh adjusting bracket; 23. Drive shaft; 24. 25. Sixth Adjustment Bracket; 26. Eighth Rotation Point; 27. Travel Motor; 28. Central Rotation Shaft; 29. ​​Seventh Rotation Point; 30. Rear Wheel Bracket; 31. Rear Wheel; 32. Fifth Adjustment Bracket; 33. Sixth Rotation Point; 34. Fifth Rotation Point; 35. Fourth Adjustment Bracket; 36. Controller; 37. Rotary Motor; 38. Positioning Bracket; 39. Anti-tipping Bracket; 40. Limiting Rod; 41. Spring Assembly; 42. Pin Shaft; 43. Limiting Slide Groove; 44. Limiting Ball; 45. Slot; 46. Movable Slot; 47. Anti-tipping Support Wheel; 48. Output Gear; 49. First Rotation Point. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are only some embodiments of this utility model, not all embodiments, and are only used to illustrate this utility model, and should not be regarded as limiting the scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figure 1-8As shown, an electric wheelchair chassis with a telescopic anti-tipping structure and easy directional control includes a chassis body 1, a first adjusting bracket 16, a second adjusting bracket 10, a third adjusting bracket 5, a fourth adjusting bracket 34, a fifth adjusting bracket 31, a sixth adjusting bracket 24, a seventh adjusting bracket 22, an eighth adjusting bracket 19, and a manual rotating shaft 13. A footrest 11 is positioned at the center of the front end of the chassis body 1. Front wheels 7 are movably mounted on both sides of the front end of the chassis body 1, and rear wheels 30 are movably mounted on both sides of the rear end of the chassis body 1. A rotary motor is installed inside the chassis body 1 near the center. 36. Output gear 47 and controller 35. A walking motor 26 is installed inside the chassis body 1 near the rear end. An eighth adjusting bracket 19 is movably installed at the bottom of the chassis body 1, below the output gear 47. A rack 4 is fixed on the eighth adjusting bracket 19 at the position corresponding to the output gear 47. The rack 4 meshes with the output gear 47. The output gear 47 drives the rack 4 and the eighth adjusting bracket 19 to move laterally. A front bearing seat 17 is installed at the bottom of the chassis body 1, connecting to the front end of the eighth adjusting bracket 19. A front bearing seat 17 is installed at the rear end of the chassis body 1, connecting to the rear end of the eighth adjusting bracket 19. The rear wheel has a rear bearing housing 20. A second adjusting bracket 10 is mounted on a manual rotating shaft 13. A first adjusting bracket 16 connects the second adjusting bracket 10 and the eighth adjusting bracket 19. A front wheel bracket 8 is mounted on the inner side of the front wheel 7. One end of a third adjusting bracket 5 is welded and fixed to the front wheel bracket 8. A fourth adjusting bracket 34 is connected to the rear end of the eighth adjusting bracket 19 at a position on the rear bearing housing 20. A sixth adjusting bracket 24 and a fifth adjusting bracket 31 are connected to the rear end of the fourth adjusting bracket 34. A drive shaft 23 and a seventh adjusting bracket 22 are mounted on the inner side of the rear wheel 30. The sixth adjusting bracket 24 and the fifth adjusting bracket 31 are connected to the drive shaft 23 and the seventh adjusting bracket 22. All frames 31 are connected to the seventh adjustment bracket 22. The front wheel 7 and the rear wheel 30 have a reversible structure. The chassis body 1 has two modes when in use. The first mode is the wheelchair mode with automatic steering control, in which the rotary motor 36 is working. The second mode is the mobility scooter mode with manual steering control, in which the rotary motor 36 is not working. You can freely switch between manual and automatic steering control. Switching to manual steering control will give you a youthful experience. It meets multiple modes. The power is automatically reduced when turning, making driving safer. An anti-rollover structure is added, which has an anti-rollover effect, making driving safer.

[0025] Furthermore, a foolproof mechanism 12 is fixed between the second adjusting bracket 10 and the manual rotating shaft 13. A first rotation point 48 is set between the manual rotating shaft 13 and the chassis body 1. The second adjusting bracket 10 is located below the first adjusting bracket 16, and the eighth adjusting bracket 19 is located above the first adjusting bracket 16. A first waist-shaped slot 9 is opened on the second adjusting bracket 10, and a third waist-shaped slot 14 is opened on the eighth adjusting bracket 19. Two sets of bearings are positioned in the middle of the first adjusting bracket 16 and are fixed to the upper and lower end faces of the center position of the first adjusting bracket 16, respectively. The bearing on the upper end face is located inside the third waist-shaped slot 14 and moves, while the bearing on the lower end face is located inside the first waist-shaped slot 9 and moves. A third rotation point 6 is set between the midpoint of the connection between the third adjusting bracket 5 and the front wheel frame 8 and the chassis body 1. A first linear bearing 15 is set between the eighth adjusting bracket 19 and the front bearing seat 17. A second linear bearing 3 is provided between the rear bearing housing 20 and the rear bearing seat 20. A second oblong groove 2 is provided on the fourth adjusting bracket 34. A ball bearing is positioned on the eighth adjusting bracket 19 at the position of the second oblong groove 2, and the ball bearing slides in the second oblong groove 2. A second rotation point 18 is provided between the first adjusting bracket 16 and the third adjusting bracket 5. A fourth rotation point 21 is provided between the fourth adjusting bracket 34 and the sixth adjusting bracket 24. A fifth rotation point 33 is provided between the fourth adjusting bracket 34 and the fifth adjusting bracket 31. An eighth rotation point 25 is provided between the sixth adjusting bracket 24 and the seventh adjusting bracket 22. A seventh rotation point 28 is provided between the fifth adjusting bracket 31 and the seventh adjusting bracket 22. A central rotating shaft 27 is provided between the seventh adjusting bracket 22 and the chassis body 1. A rear wheel bracket 29 is provided between the seventh adjusting bracket 22 and the rear wheel 30. A sixth rotation point 32 is provided between the fourth adjusting bracket 34 and the chassis body 1.

[0026] Furthermore, when the chassis body 1 is in automatic steering wheelchair mode, the controller 35 controls the rotary motor 36 to drive the output gear 47 to rotate. The output gear 47 drives the eighth adjustment bracket 19 to move left and right on the rack 4. The eighth adjustment bracket 19 drives the first adjustment bracket 16 and the fourth adjustment bracket 34 to move left and right, thereby causing the front wheel 7 and the rear wheel 30 to turn in opposite directions.

[0027] Furthermore, when the chassis body 1 is in manual steering mode, the manual pivot 13 drives the position of the second adjustment bracket 10 to rotate around the first rotation point 48. The second adjustment bracket 10 drives the positions of the first adjustment bracket 16, the eighth adjustment bracket 19, the fourth adjustment bracket 34, the sixth adjustment bracket 24, the fifth adjustment bracket 31, and the seventh adjustment bracket 22 to move, and drives the front wheel 7 and the rear wheel 30 to rotate in opposite directions.

[0028] Furthermore, the manual rotating shaft 13 drives the second adjusting bracket 10 for synchronous adjustment via the foolproof mechanism 12. The third adjusting bracket 5 and the front wheel frame 8 are welded and positioned together, and the third adjusting bracket 5 and the front wheel frame 8 rotate around the third rotating point 6 relative to the chassis body 1. The eighth adjusting bracket 19 slides parallel to the front bearing seat 17 via the first linear bearing 15. The eighth adjusting bracket 19 slides parallel to the rear bearing seat 20 via the second linear bearing 3. The eighth adjusting bracket 19 rotates with the fourth adjusting bracket 34 via the second oblong hole groove 2. The first adjusting bracket 16 and the third adjusting bracket 5... The fourth adjustment bracket 34 and the sixth adjustment bracket 24 rotate through the fourth adjustment point 21, the fourth adjustment bracket 34 and the fifth adjustment bracket 31 rotate through the fifth adjustment point 33, the sixth adjustment bracket 24 and the seventh adjustment bracket 22 rotate through the eighth adjustment point 25, the fifth adjustment bracket 31 and the seventh adjustment bracket 22 rotate through the seventh adjustment point 28, the seventh adjustment bracket 22 and the rear wheel 30 are adjusted through the rear wheel bracket 29, and the seventh adjustment bracket 22 rotates around the central rotation axis 27 at the bottom of the chassis body 1.

[0029] Furthermore, a positioning frame 37 is installed at the bottom of the chassis body 1 near the inner side of the rear wheel 30. An anti-rollover frame 38 is provided at the bottom of the positioning frame 37. A slot 44 and a movable slot 45 are provided in the middle of the anti-rollover frame 38. An anti-rollover support wheel 46 is provided at the rear end of the anti-rollover frame 38. A limit rod 39 is provided at the movable slot 45. A limit ball 43 is integrally formed at the top of the limit rod 39. A spring assembly 40 is provided on the outer wall of the limit rod 39. A limit slide groove 42 is provided at the front end of the anti-rollover frame 38. A pin 41 is provided at the lower end of the positioning frame 37. The pin 41 is located inside the limit slide groove 42. The limit ball 43 is engaged inside the slot 44 for positioning. When the anti-rollover frame 38 is pressed down, the limit ball 43 is disengaged from the slot 44. At this time, the anti-rollover frame 38 can be retracted and folded forward, and the pin 41 moves inside the limit slide groove 42.

[0030] Working principle: The system allows free switching between manual and automatic steering. Manual steering provides a more youthful experience and supports multiple modes. Power is automatically reduced during turns for enhanced safety. An anti-rollover structure is added for improved safety. When the chassis 1 is in automatic steering wheelchair mode, the controller 35 controls the rotary motor 36, which in turn drives the output gear 47 to rotate. The output gear 47 drives the eighth adjustment bracket 19 to move left and right on the rack 4, which in turn drives the first adjustment bracket. The second adjustment bracket 10 moves left and right between the first adjustment bracket 16 and the fourth adjustment bracket 34, thereby causing the front wheel 7 and the rear wheel 30 to turn in opposite directions. When the chassis body 1 is in manual steering mode, the manual pivot 13 drives the position of the second adjustment bracket 10 to rotate around the first rotation point 48. The second adjustment bracket 10 drives the positions of the first adjustment bracket 16, the eighth adjustment bracket 19, the fourth adjustment bracket 34, the sixth adjustment bracket 24, the fifth adjustment bracket 31 and the seventh adjustment bracket 22 to move, and causes the front wheel 7 and the rear wheel 30 to reverse.

[0031] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An electric wheelchair chassis with a telescopic anti-tipping structure and easy directional control, comprising a chassis body (1), a first adjusting bracket (16), a second adjusting bracket (10), a third adjusting bracket (5), a fourth adjusting bracket (34), a fifth adjusting bracket (31), a sixth adjusting bracket (24), a seventh adjusting bracket (22), an eighth adjusting bracket (19), and a manual rotating shaft (13), characterized in that: A foot pedal (11) is positioned and installed at the center of the front end of the chassis body (1). Front wheels (7) are movably installed on both sides of the front end of the chassis body (1). Rear wheels (30) are movably installed on both sides of the rear end of the chassis body (1). A rotary motor (36), an output gear (47), and a controller (35) are installed near the center inside the chassis body (1). A walking motor (26) is installed near the rear end inside the chassis body (1). The bottom of the chassis body (1) is movably positioned below the output gear (47). There is an eighth adjusting bracket (19), on which a rack (4) is fixed at a position corresponding to the output gear (47). The rack (4) meshes with the output gear (47), and the output gear (47) drives the rack (4) and the eighth adjusting bracket (19) to move laterally. A front bearing seat (17) is installed at the bottom of the chassis body (1) at the position where it connects to the front end of the eighth adjusting bracket (19), and a rear bearing seat (20) is installed at the bottom of the chassis body (1) at the position where it connects to the rear end of the eighth adjusting bracket (19). The manual... A second adjusting bracket (10) is provided on the rotating shaft (13). A first adjusting bracket (16) is connected between the second adjusting bracket (10) and the eighth adjusting bracket (19). A front wheel frame (8) is installed on the inner side of the front wheel (7). One end of the third adjusting bracket (5) is welded and fixed to the front wheel frame (8). A fourth adjusting bracket (34) is connected to the rear end of the eighth adjusting bracket (19) at a position on the rear bearing seat (20). A sixth adjusting bracket (24) and a fifth adjusting bracket (31) are connected to the rear end of the fourth adjusting bracket (34). The rear wheel (30) is provided with a drive shaft (23) and a seventh adjustment bracket (22) on its inner side. The sixth adjustment bracket (24) and the fifth adjustment bracket (31) are both connected to the seventh adjustment bracket (22). The front wheel (7) and the rear wheel (30) are in a reverse structure. The chassis body (1) has two modes when in use. The first mode is the wheelchair mode with automatic steering control. At this time, the rotary motor (36) is working. The second mode is the mobility scooter mode with manual steering control. At this time, the rotary motor (36) is not working.

2. The electric wheelchair chassis with a telescopic anti-tipping structure and easy direction control as described in claim 1, characterized in that: A foolproof mechanism (12) is fixed between the second adjusting bracket (10) and the manual rotating shaft (13). A first rotation point (48) is set between the manual rotating shaft (13) and the chassis body (1). The second adjusting bracket (10) is located below the first adjusting bracket (16), and the eighth adjusting bracket (19) is located above the first adjusting bracket (16). The second adjusting bracket (10) has a first waist-shaped hole groove (9), and the eighth adjusting bracket (19) has a third waist-shaped hole groove (14). The middle part of the first adjusting bracket (16) is positioned. There are two sets of bearings, which are fixed to the upper and lower end faces of the center position of the first adjusting bracket (16), respectively. The bearing on the upper end face is located inside the third waist-shaped hole groove (14) and moves, while the bearing on the lower end face is located inside the first waist-shaped hole groove (9) and moves. A third rotation point (6) is set between the midpoint of the connection between the third adjusting bracket (5) and the front wheel frame (8) and the chassis body (1). A first linear bearing (15) is set between the eighth adjusting bracket (19) and the front bearing seat (17). A first linear bearing (15) is set between the eighth adjusting bracket (19) and the rear bearing seat (20). A second linear bearing (3) is provided between the first adjusting bracket (16) and the third adjusting bracket (5). A second oblong groove (2) is provided on the fourth adjusting bracket (34). A ball bearing is positioned on the eighth adjusting bracket (19) at the position of the second oblong groove (2), and the ball bearing slides in the second oblong groove (2). A second rotation point (18) is provided between the first adjusting bracket (16) and the third adjusting bracket (5). A fourth rotation point (21) is provided between the fourth adjusting bracket (34) and the sixth adjusting bracket (24). A second linear bearing (3) is provided between the fourth adjusting bracket (34) and the fifth adjusting bracket (35). A fifth rotation point (33) is provided between the sixth adjustment bracket (24) and the seventh adjustment bracket (22), an eighth rotation point (25) is provided between the sixth adjustment bracket (24) and the seventh adjustment bracket (22), a seventh rotation point (28) is provided between the fifth adjustment bracket (31) and the seventh adjustment bracket (22), a central rotation shaft (27) is provided between the seventh adjustment bracket (22) and the chassis body (1), a rear wheel bracket (29) is provided between the seventh adjustment bracket (22) and the rear wheel (30), and a sixth rotation point (32) is provided between the fourth adjustment bracket (34) and the chassis body (1).

3. The electric wheelchair chassis with a telescopic anti-tipping structure and easy direction control as described in claim 1, characterized in that: When the chassis body (1) is in automatic steering wheelchair mode, the controller (35) controls the rotary motor (36) and drives the output gear (47) to rotate. The output gear (47) drives the eighth adjustment bracket (19) to move left and right on the rack (4). The eighth adjustment bracket (19) drives the first adjustment bracket (16) and the fourth adjustment bracket (34) to move left and right, thereby driving the front wheel (7) and the rear wheel (30) to turn in opposite directions.

4. The electric wheelchair chassis with a telescopic anti-tipping structure and easy direction control as described in claim 1, characterized in that: When the chassis body (1) is in manual steering mode, the manual pivot (13) drives the position of the second adjustment bracket (10) to rotate around the first rotation point (48). The second adjustment bracket (10) drives the positions of the first adjustment bracket (16), the eighth adjustment bracket (19), the fourth adjustment bracket (34), the sixth adjustment bracket (24), the fifth adjustment bracket (31) and the seventh adjustment bracket (22) to move, and drives the front wheel (7) and the rear wheel (30) to rotate in opposite directions.

5. The electric wheelchair chassis with a telescopic anti-tipping structure and easy direction control according to claim 2, characterized in that: The manual rotating shaft (13) drives the second adjusting bracket (10) to perform synchronous adjustment through the anti-foolproof mechanism (12). The third adjusting bracket (5) and the front wheel frame (8) are welded and positioned together, and the third adjusting bracket (5) and the front wheel frame (8) rotate around the third rotating point (6) with the chassis body (1). The eighth adjusting bracket (19) slides parallel to the front bearing seat (17) through the first linear bearing (15). The eighth adjusting bracket (19) slides parallel to the rear bearing seat (20) through the second linear bearing (3). The eighth adjusting bracket (19) rotates with the fourth adjusting bracket (34) through the second waist-shaped hole groove (2). The first adjusting bracket (16) and the third adjusting bracket (5) are connected by a... The fourth adjustment bracket (34) rotates through the second rotation point (18), the sixth adjustment bracket (24) rotates through the fourth rotation point (21), the fourth adjustment bracket (34) rotates through the fifth adjustment bracket (31) through the fifth rotation point (33), the sixth adjustment bracket (24) rotates through the eighth rotation point (25), the fifth adjustment bracket (31) rotates through the seventh adjustment bracket (22) through the seventh rotation point (28), the seventh adjustment bracket (22) moves and adjusts with the rear wheel (30) through the rear wheel bracket (29), and the seventh adjustment bracket (22) rotates around the central rotation axis (27) at the bottom of the chassis body (1).

6. The electric wheelchair chassis with a telescopic anti-tipping structure and easy direction control according to claim 1, characterized in that: A positioning frame (37) is installed at the bottom of the chassis body (1) near the inner side of the rear wheel (30). An anti-rollover frame (38) is provided at the bottom of the positioning frame (37). A slot (44) and a movable slot (45) are provided in the middle of the anti-rollover frame (38). An anti-rollover support wheel (46) is provided at the rear end of the anti-rollover frame (38). A limit rod (39) is provided at the movable slot (45). A limit ball (43) is integrally formed at the top of the limit rod (39). The outer wall of the limit rod (39) is provided with a... The spring assembly (40) has a limiting groove (42) at the front end of the anti-tipping frame (38). The positioning frame (37) has a pin (41) at its lower end. The pin (41) is located inside the limiting groove (42). The limiting ball (43) is engaged inside the slot (44) for positioning. When the anti-tipping frame (38) is pressed down, the limiting ball (43) is disengaged from the slot (44). At this time, the anti-tipping frame (38) can be retracted and folded forward. The pin (41) moves inside the limiting groove (42).

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