A wheelchair facilitating flexible switching between manual and automatic

Abstract

The application provides a wheelchair which can be switched between manual mode and automatic mode flexibly, comprising a bottom vehicle body mechanism, a seat mechanism, a footrest mechanism, a folding mechanism, a push rod mechanism and a control mechanism, the upper and lower ends of the folding mechanism are fixed on the seat mechanism and the bottom vehicle body mechanism respectively, the footrest mechanism is fixed on the front side of the seat mechanism, the two ends of the push rod mechanism are fixed on the bottom vehicle body mechanism and the folding mechanism respectively, and the push rod mechanism is used for driving the folding mechanism to unfold or fold, the control mechanism is fixed on the seat mechanism and electrically connected with the bottom vehicle body mechanism and the push rod mechanism; the push rod mechanism comprises a mounting seat, a driving motor, a push rod assembly and a switching assembly. The wheelchair can be switched between the automatic mode and the manual mode flexibly, so that different use scenes can be met, and greater convenience is brought to the user.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of folding wheelchair structure, in particular to a wheelchair which can be switched between manual and automatic modes flexibly. BACKGROUND

[0002] Folding wheelchair is a tool for special groups such as the disabled, the elderly, the weak and medical clinical rehabilitation patients, etc. It is widely used because it can be folded, thus being convenient to carry and occupying less space. In order to make the folding or unfolding of the wheelchair more convenient, an electric push rod is widely used as a power source to make the wheelchair fold or unfold automatically. However, when the power is exhausted, the electric push rod cannot work normally, and under the resistance of the driving motor, the wheelchair cannot be folded or unfolded manually, or it needs a lot of strength to be operated manually, which is undoubtedly a big problem for the users who are weak. Therefore, it is necessary to make a wheelchair which can be switched between manual and automatic modes flexibly to solve the above problems. SUMMARY

[0003] The purpose of the present application is to provide a wheelchair which can be switched between manual and automatic modes flexibly to solve the problems mentioned in the background.

[0004] In order to achieve the above purpose, the present application provides the following technical scheme:

[0005] A wheelchair which can be switched between manual and automatic modes flexibly, comprising a bottom vehicle body mechanism, a seat mechanism, a footrest mechanism, a folding mechanism, a push rod mechanism and a control mechanism, the upper and lower ends of the folding mechanism are fixed on the seat mechanism and the bottom vehicle body mechanism respectively, the footrest mechanism is fixed on the front side of the seat mechanism, the two ends of the push rod mechanism are fixed on the bottom vehicle body mechanism and the folding mechanism respectively, and the push rod mechanism is used to drive the folding mechanism to unfold or fold, the control mechanism is fixed on the seat mechanism and electrically connected with the bottom vehicle body mechanism and the push rod mechanism; the push rod mechanism comprises a mounting seat, a driving motor, a push rod assembly and a switching assembly, one side of the outside of the mounting seat is provided with a connecting lug, the connecting lug is mounted on the folding mechanism, an installation cavity is arranged in the mounting seat, the other side of the outside of the mounting seat is fixed with the push rod assembly, the power output end of the push rod assembly is connected with the bottom vehicle body mechanism, a driving shaft is arranged on the push rod assembly and used to drive the power output end of the push rod assembly, a driven gear is further arranged on the push rod assembly and fixed on the driving shaft and corresponding to the installation cavity, the driving motor is fixed on the mounting seat, a driving gear is arranged on the driving motor and fixed on the power output end of the driving motor and corresponding to the installation cavity, the switching assembly is fixed on the mounting seat and connected with the driving gear and the driven gear respectively, and the switching assembly is used to switch the driving gear and the driven gear between the driving state and the non-driving state.

[0006] Further description of the present invention: The switching assembly includes a gear set, a first rotating drum, a second rotating drum, a first connecting gear, a second connecting gear, and a rotating drum connecting assembly. The first and second rotating drums are rotatably mounted in the mounting cavity. The first connecting gear and the second connecting gear are respectively fixed outside the first and second rotating drums. The gear set is fixed in the mounting cavity and meshes with both the driving gear and the first connecting gear. The second connecting gear meshes with the driven gear. The rotating drum connecting assembly is fixed on the mounting base. The power output end of the rotating drum connecting assembly passes through the first and second rotating drums and is used to switch the first and second rotating drums to a driving connection or a non-driving connection.

[0007] Further description of the present invention: The rotary drum connecting assembly includes a mounting housing, a manual switch, a switching shaft, a switching gear, and a return spring. The mounting housing is fixed on a mounting base and has a sliding cavity inside. The first rotary drum and the second rotary drum are respectively provided with a first internal tooth and a second internal tooth. The two ends of the switching gear correspond to the first rotary drum and the second rotary drum, respectively, and the two ends of the switching gear mesh with the first internal tooth and the second internal tooth. The manual switch is fixed on the mounting housing and its power output end is slidably connected to the sliding cavity. One end of the switching shaft is fixed to the power output end of the manual switch, and the other end passes through the second rotary drum. The return spring is disposed in the first rotary drum. The switching shaft and the return spring correspond to the two sides of the switching gear, respectively.

[0008] Further description of the present invention: The manual switch includes a rotating block, a sliding block, and a rotating handle. The rotating block is rotatably mounted on the end of the mounting housing. The rotating handle is fixed to the outer end of the rotating block. The inner end of the rotating block is provided with a driving boss. The sliding block is slidably connected to the sliding cavity. The sliding block is provided with a driving ramp and an abutment platform. The driving boss corresponds to the driving ramp. The abutment platform is connected to the side of the driving ramp near the rotating handle. The outer periphery of the switching shaft is provided with a driving protrusion ring. The driving protrusion ring abuts against the side of the sliding block away from the rotating handle.

[0009] Further description of the present invention: two sets of driving bosses are symmetrically arranged on both sides of the outer periphery of the rotating block, and two sets of driving ramps and contact platforms are symmetrically arranged on both sides of the outer periphery of the sliding block.

[0010] Further description of the invention: The rotary drum connecting assembly also includes a guide shaft, which is rotatably mounted in the mounting base and sequentially passes through the first rotary drum, the return spring, the switching gear, and the switching shaft.

[0011] Further description of the present invention: The push rod mechanism also includes a first bearing and a second bearing, both of which are fixed on the mounting base. An annular groove is provided on one side of the first rotating cylinder near the second rotating cylinder. The other side of the first rotating cylinder is rotatably mounted in the first bearing. An annular boss corresponding to the annular groove is provided on one side of the second rotating cylinder. The other side of the second rotating cylinder is rotatably mounted in the second bearing.

[0012] Further description of the invention: The folding mechanism includes a folding frame, a first sector gear, a second sector gear, a gear connecting plate, and a connecting beam. The folding frame includes a body connecting frame, a seat connecting frame, a front folding bracket, a rear folding bracket, a front lifting bracket, a rear lifting bracket, and a triangular connecting frame. The body connecting frame is fixed to the bottom body mechanism, and the seat connecting frame is fixed to the seat mechanism. The lower end of the front folding bracket is hinged to the front end of the body connecting frame, and the upper end is hinged to the tip of the lower front side of the triangular connecting frame. The lower end of the rear folding bracket is hinged to the rear end of the body connecting frame, and the upper end is hinged to the tip of the rear side of the triangular connecting frame. The upper end of the front lifting bracket is hinged to the front end of the seat connecting frame, and the lower end is hinged to the tip of the upper front side of the triangular connecting frame. The rear lifting bracket is hinged to the rear end of the seat connecting bracket and hinged to the tip of the rear side of the triangular connecting bracket. The front teeth of the first sector gear mesh with the rear teeth of the second sector gear. The rear side of the first sector gear is fixed to the lower end of the rear lifting bracket, and the front side of the second sector gear is fixed to the upper end of the front folding bracket. The gear connecting plate is fixed to the second sector gear. The end of the connecting beam is fixed to the gear connecting plate and corresponds to the tip and teeth of the second sector gear. The folding frame, the first sector gear, the second sector gear and the gear connecting plate are all provided in two sets and correspond to the left and right sides of the connecting beam respectively. The connecting ear is hinged to the connecting beam. The power output end of the push rod assembly is hinged to the bottom body mechanism.

[0013] The beneficial effects of this invention are as follows: By setting a switching component, the drive motor and push rod assembly can be manually switched between automatic and manual modes. When the wheelchair has sufficient power, automatic mode is used; when the wheelchair's power is depleted, manual mode is used to disconnect the drive motor and push rod assembly. This allows for easy manual operation of the folding mechanism without having to overcome the resistance of the drive motor. The advantage of this design is that the wheelchair can flexibly switch between automatic and manual modes to meet different usage scenarios, bringing greater convenience to the user. Attached Figure Description

[0014] Figure 1 This is an overall structural diagram of the present invention;

[0015] Figure 2 This is a structural diagram of the folding mechanism and the push rod mechanism in this invention;

[0016] Figure 3 This is a structural diagram of the push rod mechanism in this invention;

[0017] Figure 4 This is a cross-sectional view of the push rod mechanism in this invention;

[0018] Figure 5 yes Figure 4 A magnified view of a portion of position A in the middle;

[0019] Figure 6 This is a structural diagram of the push rod mechanism in this invention (where the mounting base is hidden);

[0020] Figure 7 This is a structural diagram of the switching component, the first bearing, and the second bearing in this invention;

[0021] Figure 8 This is a structural diagram of the manual switch in this invention;

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Bottom body mechanism; 2. Seat mechanism; 3. Foot pedal mechanism; 4. Folding mechanism; 41. Folding frame; 411. Body connecting frame; 412. Seat connecting frame; 413. Front folding bracket; 414. Rear folding bracket; 415. Front lifting bracket; 416. Rear lifting bracket; 417. Triangular connecting frame; 42. First sector gear; 43. Second sector gear; 44. Gear connecting plate; 45. Connecting crossbeam; 5. Push rod mechanism; 51. Mounting base; 511. Connecting ear; 512. Mounting cavity; 52. Drive motor; 521. Drive gear; 53. Push rod assembly; 531. Drive shaft; 532. Driven gear; 54. Switching assembly; 541. Transmission gear set; 542. 5421. First rotating drum; 543. Annular groove; 544. Second rotating drum; 545. Annular boss; 546. First connecting gear; 547. Second connecting gear; 548. Rotating drum connecting assembly; 549. Mounting housing; 5461. Sliding cavity; 5462. Manual switch; 54621. Rotating block; 546211. Driving boss; 54622. Sliding block; 546221. Driving ramp; 546222. Contact platform; 54623. Rotating handle; 5464. Switching shaft; 5463. Driving convex ring; 5464. Switching gear; 5465. Return spring; 5466. Guide shaft; 55. First bearing; 56. Second bearing; 6. Control mechanism. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figures 1 to 8As shown, a wheelchair that is easy to switch between manual and automatic modes includes a bottom body mechanism 1, a seat mechanism 2, a foot pedal mechanism 3, a folding mechanism 4, a push rod mechanism 5, and a control mechanism 6. The upper and lower ends of the folding mechanism 4 are fixed to the seat mechanism 2 and the bottom body mechanism 1, respectively. The foot pedal mechanism 3 is fixed to the front side of the seat mechanism 2. The two ends of the push rod mechanism 5 are fixed to the bottom body mechanism 1 and the folding mechanism 4, respectively, and are used to drive the folding structure to unfold or fold. The control mechanism 6 is fixed to the seat mechanism 2 and is electrically connected to the bottom body mechanism 1 and the push rod mechanism 5.

[0026] The push rod mechanism 5 includes a mounting base 51, a drive motor 52, a push rod assembly 53, and a switching assembly 54. A connecting ear 511 is provided on one side of the outer surface of the mounting base 51, and the connecting ear 511 is mounted on the folding mechanism 4. A mounting cavity 512 is provided inside the mounting base 51. The push rod assembly 53 is fixed to the other side of the outer surface of the mounting base 51. The power output end of the push rod assembly 53 is connected to the bottom vehicle body mechanism 1. A drive shaft 531 is provided on the push rod assembly 53, which is used to drive the power output end of the push rod assembly 53. The push rod assembly 53 also has... Driven gear 532 is fixed on drive shaft 531 and corresponds to the mounting cavity 512. Drive motor 52 is fixed on mounting base 51. Drive motor 52 is provided with drive gear 521. Drive gear 521 is fixed on the power output end of drive motor 52 and corresponds to the mounting cavity 512. Switching component 54 is fixed on mounting base 51 and connected to drive gear 521 and driven gear 532 respectively. Switching component 54 is used to switch drive gear 521 and driven gear 532 to drive state or non-drive state.

[0027] By setting the switching component 54, the connection between the drive motor 52 and the push rod assembly 53 can be manually switched, i.e., switching between automatic and manual modes. When the wheelchair has sufficient power, automatic mode is used; when the wheelchair's power is depleted, manual mode is used, disconnecting the drive motor 52 from the push rod assembly 53. This allows for easy manual operation of the folding mechanism 4 without having to overcome the resistance of the drive motor 52. The advantage of this design is that the wheelchair can flexibly switch between automatic and manual modes to meet different usage scenarios, bringing greater convenience to the user.

[0028] The switching assembly 54 includes a gear set 541, a first rotating drum 542, a second rotating drum 543, a first connecting gear 544, a second connecting gear 545, and a rotating drum connecting assembly 546. The first rotating drum 542 and the second rotating drum 543 are rotatably mounted in the mounting cavity 512. The first connecting gear 544 and the second connecting gear 545 are respectively fixed outside the first rotating drum 542 and the second rotating drum 543. The gear set 541 is fixed in the mounting cavity 512 and meshes with both the driving gear 521 and the first connecting gear 544. The second connecting gear 545 meshes with the driven gear 532. The rotating drum connecting assembly 546 is fixed on the mounting base 51. The power output end of the rotating drum connecting assembly 546 passes through the first rotating drum 542 and the second rotating drum 543 and is used to switch the first rotating drum 542 and the second rotating drum 543 to a driving connection or a non-driving connection.

[0029] The drive motor 52 drives the transmission gear set 541 to rotate via the drive gear 521. The transmission gear set 541 drives the first connecting gear 544 and the first rotating drum 542 to rotate. When the rotating drum connecting assembly 546 switches the first rotating drum 542 and the second rotating drum 543 to drive connection (automatic mode), the second rotating drum 543 rotates synchronously with the first rotating drum 542, thereby driving the driven gear 532 to rotate via the second connecting gear 545. The driven gear 532 then drives the drive shaft 531 on the push rod assembly 53 to rotate, causing the power output end of the push rod assembly 53 to extend or retract, thus controlling the unfolding or folding of the folding mechanism 4. When the rotating drum connecting assembly 546 switches the first rotating drum 542 and the second rotating drum 543 to non-drive connection (manual mode), the second rotating drum 543 can rotate freely without being affected by the resistance of the drive motor 52, thus enabling easy operation of the folding mechanism 4.

[0030] The rotating drum connecting assembly 546 includes a mounting housing 5461, a manual switch 5462, a switching shaft 5463, a switching gear 5464, and a return spring 5465. The mounting housing 5461 is fixed on the mounting base 51 and has a sliding cavity 54611 inside. The first rotating drum 542 and the second rotating drum 543 are respectively provided with a first internal tooth and a second internal tooth. The two ends of the switching gear 5464 correspond to the first rotating drum 542 and the second rotating drum 543, respectively, and the two ends of the switching gear 5464 mesh with the first internal tooth and the second internal tooth, respectively. The manual switch 5462 is fixed on the mounting housing 5461 and its power output end is slidably connected to the sliding cavity 54611. One end of the switching shaft 5463 is fixed to the power output end of the manual switch 5462, and the other end passes through the second rotating drum 543. The return spring 5465 is disposed in the first rotating drum 542. The switching shaft 5463 and the return spring 5465 correspond to the two sides of the switching gear 5464, respectively.

[0031] The manual switch 5462 drives the switching shaft 5463 to slide within the sliding cavity 54611, thereby driving the position of the switching gear 5464. When the switching gear 5464 is engaged with both the first rotating drum 542 and the second rotating drum 543, the first rotating drum 542 and the second rotating drum 543 rotate synchronously. When the switching gear 5464 is engaged only with the first rotating drum 542, the second rotating drum 543 can rotate freely. The return spring 5465 is used to return the switching gear 5464 to the position where it is engaged with both the first rotating drum 542 and the second rotating drum 543 simultaneously.

[0032] The manual switch 5462 includes a rotating block 54621, a sliding block 54622, and a rotating handle 54623. The rotating block 54621 is rotatably mounted on the end of the mounting housing 5461. The rotating handle 54623 is fixed to the outer end of the rotating block 54621. The inner end of the rotating block 54621 is provided with a driving boss 546211. The sliding block 54622 is slidably connected to the sliding cavity 54611. The sliding block 54622 is provided with a driving ramp 546221 and a contact platform 546222. The driving boss 546211 corresponds to the driving ramp 546221. The contact platform 546222 is connected to the side of the driving ramp 546221 near the rotating handle 54623. The outer periphery of the switching shaft 5463 is provided with a driving protrusion ring 54631. The driving protrusion ring 54631 abuts against the side of the sliding block 54622 away from the rotating handle 54623.

[0033] By rotating the rotary handle 54623, the rotating block 54621 is simultaneously driven to rotate. The driving boss 546211 on the rotating block 54621 moves along the surface of the driving ramp 546221, thereby driving the sliding block 54622 to slide along the axial direction of the sliding cavity 54611. This drives the switching shaft 5463 to move axially via the driving ring 54631. When the driving boss 546211 moves to the contact platform 546222, the sliding block 54622 is in the maximum ejection position. At this time, the rotary handle 54623 will not rebound even without external force, making it convenient to manually operate the folding mechanism 4.

[0034] Two sets of driving bosses 546211 are symmetrically arranged on both sides of the outer periphery of the rotating block 54621, and two sets of driving ramps 546221 and contact platforms 546222 are symmetrically arranged on both sides of the outer periphery of the sliding block 54622.

[0035] This ensures that the force on both sides of the sliding block 54622 is even, which facilitates its smooth sliding within the sliding cavity 54611.

[0036] The rotating drum connecting assembly 546 further includes a guide shaft 5466, which is rotatably mounted in the mounting base 51 and sequentially passes through the first rotating drum 542, the return spring 5465, the switching gear 5464, and the switching shaft 5463.

[0037] The guide shaft 5466 guides the first rotating drum 542, the return spring 5465, the switching gear 5464, and the switching shaft 5463, thereby increasing the stability of the structure.

[0038] The push rod mechanism 5 also includes a first bearing 55 and a second bearing 56. Both the first bearing 55 and the second bearing 56 are fixed on the mounting base 51. An annular groove 5421 is provided on one side of the first rotating cylinder 542 near the second rotating cylinder 543. The other side of the first rotating cylinder 542 is rotatably installed in the first bearing 55. An annular boss 5431 corresponding to the annular groove 5421 is provided on one side of the second rotating cylinder 543. The other side of the second rotating cylinder 543 is rotatably installed in the second bearing 56.

[0039] The second rotating cylinder 543 can be partially fitted onto the first rotating cylinder 542 through the cooperation of the annular groove 5421 and the annular boss 5431. Even when the second rotating cylinder 543 is rotating freely, it can maintain a precise positional relationship with the first rotating cylinder 542.

[0040] The folding mechanism 4 includes a folding frame 41, a first sector gear 42, a second sector gear 43, a gear connecting plate 44, and a connecting beam 45. The folding frame 41 includes a body connecting frame 411, a seat connecting frame 412, a front folding bracket 413, a rear folding bracket 414, a front lifting bracket 415, a rear lifting bracket 416, and a triangular connecting frame 417. The body connecting frame 411 is fixed to the bottom body mechanism 1, and the seat connecting frame 412 is fixed to the seat mechanism 2. The lower end of the front folding bracket 413 is hinged to the front end of the body connecting frame 411, and the upper end is hinged to the tip of the lower front side of the triangular connecting frame 417. The lower end of the rear folding bracket 414 is hinged to the rear end of the body connecting frame 411, and the upper end is hinged to the tip of the rear side of the triangular connecting frame 417. The upper end of the front lifting bracket 415 is hinged to the front end of the seat connecting frame 412, and the lower end is hinged to the tip of the front side of the triangular connecting frame 417. The upper tip is hinged, the upper end of the rear lifting bracket 416 is hinged to the rear end of the seat connecting bracket 412, and the lower end is hinged to the tip of the rear side of the triangular connecting bracket 417. The front teeth of the first sector gear 42 mesh with the rear teeth of the second sector gear 43. The rear side of the first sector gear 42 is fixed to the lower end of the rear lifting bracket 416, and the front side of the second sector gear 43 is fixed to the upper end of the front folding bracket 413. The gear connecting plate 44 is fixed to the second sector gear 43. The end of the connecting beam 45 is fixed to the gear connecting plate 44 and corresponds to the tip and teeth of the second sector gear 43. The folding frame 41, the first sector gear 42, the second sector gear 43 and the gear connecting plate 44 are all provided in two sets and correspond to the left and right sides of the connecting beam 45 respectively. The connecting ear 511 is hinged to the connecting beam 45. The power output end of the push rod assembly 53 is hinged to the bottom vehicle body mechanism 1.

[0041] When the power output end of the push rod mechanism 5 extends, it drives the connecting beam 45 to swing, thereby driving the second sector gear 43 to rotate. The second sector gear 43 drives the first sector gear 42 to rotate, thereby causing the front folding bracket 413 and the rear lifting bracket 416 to move relative to each other, and thus driving the folding frame 41 to fold or unfold.

[0042] The above does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the technical scope of the present invention.

Claims

1. A wheelchair that allows for flexible switching between manual and automatic operation, characterized in that: The device includes a bottom body mechanism, a seat mechanism, a foot pedal mechanism, a folding mechanism, a push rod mechanism, and a control mechanism. The upper and lower ends of the folding mechanism are respectively fixed to the seat mechanism and the bottom body mechanism. The foot pedal mechanism is fixed to the front side of the seat mechanism. The two ends of the push rod mechanism are respectively fixed to the bottom body mechanism and the folding mechanism, and are used to drive the folding structure to unfold or fold. The control mechanism is fixed to the seat mechanism and is electrically connected to the bottom body mechanism and the push rod mechanism. The push rod mechanism includes a mounting base, a drive motor, a push rod assembly, and a switching assembly. A connecting ear is provided on one side of the outer side of the mounting base, and the connecting ear is mounted on the folding mechanism. A mounting cavity is provided inside the mounting base. The push rod assembly is fixed to the other side of the outer side of the mounting base. The power output end of the push rod assembly is connected to the bottom vehicle body mechanism. A drive shaft is provided on the push rod assembly, and the drive shaft is used to drive the power output end of the push rod assembly. A driven gear is also provided on the push rod assembly, and the driven gear is fixed to the drive shaft and corresponds to the mounting cavity. The drive motor is fixed to the mounting base, and the drive motor has a driving gear, which is fixed to the power output end of the drive motor and corresponds to the mounting cavity. The switching assembly is fixed to the mounting base and is connected to both the driving gear and the driven gear. The switching assembly is used to switch the driving gear and the driven gear to a driving state or a non-driving state. The switching assembly includes a gear set, a first rotating drum, a second rotating drum, a first connecting gear, a second connecting gear, and a rotating drum connecting assembly. The first rotating drum and the second rotating drum are rotatably mounted in the mounting cavity. The first connecting gear and the second connecting gear are respectively fixed outside the first rotating drum and the second rotating drum. The gear set is fixed in the mounting cavity and meshes with both the driving gear and the first connecting gear. The second connecting gear meshes with the driven gear. The rotating drum connecting assembly is fixed on the mounting base. The power output end of the rotating drum connecting assembly passes through the first rotating drum and the second rotating drum, and is used to switch the first rotating drum and the second rotating drum to a driven connection or a non-driven connection. The rotating drum connection assembly includes a mounting housing, a manual switch, a switching shaft, a switching gear, and a return spring. The mounting housing is fixed on the mounting base and has a sliding cavity inside. The first rotating drum and the second rotating drum are respectively provided with a first internal tooth and a second internal tooth. The two ends of the switching gear correspond to the first rotating drum and the second rotating drum, respectively, and the two ends of the switching gear mesh with the first internal tooth and the second internal tooth, respectively. The manual switch is fixed on the mounting housing and its power output end is slidably connected to the sliding cavity. One end of the switching shaft is fixed to the power output end of the manual switch, and the other end passes through the second rotating drum. The return spring is disposed in the first rotating drum. The switching shaft and the return spring correspond to the two sides of the switching gear, respectively.

2. The wheelchair according to claim 1, which allows for flexible switching between manual and automatic operation, is characterized in that: The manual switch includes a rotating block, a sliding block, and a rotating handle. The rotating block is rotatably mounted on the end of the mounting housing. The rotating handle is fixed to the outer end of the rotating block. The inner end of the rotating block is provided with a driving boss. The sliding block is slidably connected to the sliding cavity. The sliding block is provided with a driving ramp and a contact platform. The driving boss corresponds to the driving ramp. The contact platform is connected to the side of the driving ramp near the rotating handle. The outer periphery of the switching shaft is provided with a driving protrusion ring. The driving protrusion ring abuts against the side of the sliding block away from the rotating handle.

3. A wheelchair that allows for flexible switching between manual and automatic operation according to claim 2, characterized in that: Two sets of driving bosses are symmetrically arranged on both sides of the outer periphery of the rotating block, and two sets of driving ramps and abutting platforms are symmetrically arranged on both sides of the outer periphery of the sliding block.

4. A wheelchair that allows for flexible switching between manual and automatic operation according to claim 1, characterized in that: The rotating drum connecting assembly further includes a guide shaft, which is rotatably mounted in the mounting base and sequentially passes through the first rotating drum, the return spring, the switching gear, and the switching shaft.

5. A wheelchair that allows for flexible switching between manual and automatic operation according to claim 1, characterized in that: The push rod mechanism also includes a first bearing and a second bearing, both of which are fixed on the mounting base. An annular groove is provided on one side of the first rotating cylinder near the second rotating cylinder, and the other side of the first rotating cylinder is rotatably mounted in the first bearing. An annular boss corresponding to the annular groove is provided on one side of the second rotating cylinder, and the other side of the second rotating cylinder is rotatably mounted in the second bearing.

6. A wheelchair that allows for flexible switching between manual and automatic operation according to claim 1, characterized in that: The folding mechanism includes a folding frame, a first sector gear, a second sector gear, a gear connecting plate, and a connecting beam. The folding frame includes a vehicle body connecting frame, a seat connecting frame, a front folding bracket, a rear folding bracket, a front lifting bracket, a rear lifting bracket, and a triangular connecting frame. The vehicle body connecting frame is fixed to the bottom vehicle body mechanism, and the seat connecting frame is fixed to the seat mechanism. The lower end of the front folding bracket is hinged to the front end of the vehicle body connecting frame, and the upper end is hinged to the tip of the lower front side of the triangular connecting frame. The lower end of the rear folding bracket is hinged to the rear end of the vehicle body connecting frame, and the upper end is hinged to the tip of the rear side of the triangular connecting frame. The upper end of the front lifting bracket is hinged to the front end of the seat connecting frame, and the lower end is hinged to the tip of the upper front side of the triangular connecting frame. The upper end of the rear lifting bracket is hinged to the front end of the seat connecting frame, and the lower end is hinged to the tip of the upper front side of the triangular connecting frame. The rear end of the seat connecting frame is hinged, and the lower end is hinged to the tip of the rear side of the triangular connecting frame. The front teeth of the first sector gear mesh with the rear teeth of the second sector gear. The rear side of the first sector gear is fixed to the lower end of the rear lifting bracket, and the front side of the second sector gear is fixed to the upper end of the front folding bracket. The gear connecting plate is fixed to the second sector gear. The end of the connecting beam is fixed to the gear connecting plate and corresponds to the tip and teeth of the second sector gear. The folding frame, the first sector gear, the second sector gear, and the gear connecting plate are all provided in two sets and respectively correspond to the left and right sides of the connecting beam. The connecting ear is hinged to the connecting beam. The power output end of the push rod assembly is hinged to the bottom vehicle body mechanism.

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