Wheelchair convenient to flexibly switch between manual operation and automatic operation

Abstract

The wheelchair comprises a bottom vehicle body mechanism, a seat mechanism, a pedal mechanism, a folding mechanism, a push rod mechanism and a control mechanism, the upper end and the lower end of the folding mechanism are fixed to the seat mechanism and the bottom vehicle body mechanism respectively, and the pedal mechanism is fixed to the front side of the seat mechanism; the two ends of the push rod mechanism are fixed to the bottom vehicle body mechanism and the folding mechanism respectively and used for driving the folding mechanism to be unfolded or folded, and the control mechanism is fixed to the seat mechanism and electrically connected with the bottom vehicle body mechanism and the push rod mechanism. The push rod mechanism comprises a mounting base, a driving motor, a push rod assembly and a switching assembly. The wheelchair has the advantages that the wheelchair can be flexibly switched between an automatic mode and a manual mode so as to meet different use scenes, and greater convenience is brought to a user.

Description

Technical Field

[0001] The invention relates to the field of foldable wheelchair structures, and in particular to a wheelchair that is convenient for flexible switching between manual and automatic operation. Background Art

[0002] Folding wheelchairs are a means of transportation for special groups of people, such as the disabled, the elderly and the weak, and patients undergoing medical clinical rehabilitation. They are widely used because they can be folded, are easy to carry, and take up little space. In order to make the folding or unfolding of the wheelchair more convenient, electric push rods have been widely used as a power source to automatically fold or unfold the wheelchair. However, when the power supply is exhausted, the electric push rod cannot work properly, and under the resistance of the driving motor, the electric push rod makes it impossible to fold or unfold the wheelchair manually, or it requires a lot of force to manually operate it, which is undoubtedly worse for users who are already weak. Therefore, it is necessary to produce a wheelchair that is easy to switch between manual and automatic operations to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a wheelchair that is easy to flexibly switch between manual and automatic control to solve the problems mentioned in the background technology.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A wheelchair that is convenient for flexible switching between manual and automatic control, comprising a bottom body mechanism, a seat mechanism, a pedal mechanism, a folding mechanism, a push rod mechanism and a control mechanism, wherein the upper and lower ends of the folding mechanism are respectively fixed to the seat mechanism and the bottom body mechanism, the 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, and the control mechanism is fixed to the seat mechanism and is electrically connected to the bottom body mechanism and the push rod mechanism;

[0006] The push rod mechanism includes a mounting seat, a driving motor, a push rod assembly and a switching assembly. A connecting ear is provided on one side of the outside of the mounting seat, and the connecting ear is installed on the folding mechanism. A mounting cavity is provided in the mounting seat, and the push rod assembly is fixed to the other side of the outside of the mounting seat. The power output end of the push rod assembly is connected to the bottom body mechanism. A driving shaft is provided on the push rod assembly, and the driving 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 on the driving shaft and corresponds to the mounting cavity. The driving motor is fixed on the mounting seat, and a driving gear is provided on the driving motor. The driving gear is fixed at the power output end of the driving motor and corresponds to the mounting cavity. The switching assembly is fixed on the mounting seat and is respectively connected with 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.

[0007] Further description of the present invention: The switching assembly includes a speed change 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 both 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 speed change gear set is fixed in the mounting cavity and is meshed with the driving gear and the first connecting gear. The second connecting gear is meshed with the driven gear. The rotating drum connecting assembly is fixed on the mounting seat. The power output end of the rotating drum connecting assembly is penetrated in the first rotating drum and the second rotating drum, and is used to switch the first rotating drum and the second rotating drum into a drive connection or a non-drive connection.

[0008] Further description of the present invention: The rotating drum connecting assembly includes an installation shell, a manual switch, a switching shaft, a switching gear and a return spring. The installation shell is fixed on the mounting seat 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. The two ends of the switching gear are respectively meshed with the first internal tooth and the second internal tooth. The manual switch is fixed on the installation shell and the power output end is slidably connected with the sliding cavity. One end of the switching shaft is fixed at the power output end of the manual switch, and the other end is passed through the second rotating drum. The return spring is arranged in the first rotating drum. The switching shaft and the return spring correspond to the two sides of the switching gear respectively.

[0009] 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 shell, the rotating handle is fixed to the outer end of the rotating block, a driving boss is provided at the inner end of the rotating block, the sliding block is slidably connected to the sliding cavity, a driving ramp and a contact platform are provided on the sliding block, the driving boss corresponds to the driving ramp, the contact platform is connected to the side of the driving ramp close to the rotating handle, a driving convex ring is provided on the outer periphery of the switching shaft, and the driving convex ring is abutted against the side of the sliding block away from the rotating handle.

[0010] Further description of the present invention: two groups of driving bosses are symmetrically arranged on both sides of the outer periphery of the rotating block, and two groups of driving inclined platforms and abutment platforms are symmetrically arranged on both sides of the outer periphery of the sliding block.

[0011] Further description of the present invention: The rotating drum connecting assembly also includes a guide shaft rod, which is rotatably mounted in the mounting seat and passes through the first rotating drum, the return spring, the switching gear and the switching shaft rod in sequence.

[0012] 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 seat, an annular groove is provided on the side of the first rotating cylinder close to the second rotating cylinder, and the other side of the first rotating cylinder is rotatably mounted in the first bearing, and 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.

[0013] Further description of the present invention: the folding mechanism includes a folding frame, a first sector gear, a second sector gear, a gear connecting plate and a connecting crossbeam, 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, 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 below the 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 The tip is hinged, the upper end of the rear lifting bracket is hinged to the rear end of the seat connecting frame, and the lower end is hinged to the tip of the rear side of the triangular connecting frame. The teeth on the front side of the first sector gear are meshed with the teeth on the rear side 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 gear, and the end of the connecting beam is fixed to the gear connecting plate and corresponds to the tip and the teeth of the second gear. The folding frame, the first sector gear, the second sector gear and the gear connecting plate are all arranged in two groups and correspond to the left and right sides of the connecting beam respectively. The connecting ear is hinged to the connecting beam, and the power output end of the push rod assembly is hinged to the bottom body mechanism.

[0014] The beneficial effect of the present invention is that by setting a switching component, it is possible to manually switch whether the drive motor and the push rod component are driven and connected, that is, to switch between the automatic mode and the manual mode. When the wheelchair has sufficient power, the automatic mode is used. When the wheelchair runs out of power, the manual mode is used to cut off the drive connection between the drive motor and the push rod component, so that when the folding mechanism is manually folded or unfolded, there is no need to overcome the resistance of the drive motor, and the folding mechanism can be manually operated easily. The advantage of this design is that the wheelchair can flexibly switch between the automatic mode and the manual mode to meet different usage scenarios, bringing greater convenience to the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall structure diagram of the present invention;

[0016] Figure 2 It is a structural diagram of the folding mechanism and the push rod mechanism in the present invention;

[0017] Figure 3 It is a structural diagram of the push rod mechanism in the present invention;

[0018] Figure 4 is a cross-sectional view of the push rod mechanism in the present invention;

[0019] Figure 5 yes Figure 4 A partial enlarged view of position A in the middle;

[0020] Figure 6 is a structural diagram of the push rod mechanism in the present invention (wherein the mounting seat is partially hidden);

[0021] Figure 7 is a structural diagram of the switching assembly, the first bearing and the second bearing in the present invention;

[0022] Figure 8 It is a structural diagram of the manual switch in the present invention;

[0023] Description of reference numerals:

[0024] 1. Bottom vehicle body mechanism; 2. Seat mechanism; 3. Pedal mechanism; 4. Folding mechanism; 41. Folding frame; 411. Vehicle 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 seat; 511. Connecting ear; 512. Mounting cavity; 52. Driving motor;

[0025] 521, driving gear; 53, push rod assembly; 531, driving shaft; 532, driven gear; 54, switching assembly; 541, speed change gear set; 542, first rotating drum; 5421, annular groove; 543, second rotating drum; 5431, annular boss; 544, first connecting gear; 545, second connecting gear; 546, rotating drum connecting assembly; 5461, mounting housing; 54611, sliding cavity; 546 2. Manual switch; 54621. Rotating block; 546211. Driving boss; 54622. Sliding block; 546221. Driving ramp; 546222. Resistance platform; 54623. Rotating handle; 5463. Switching shaft; 54631. Driving convex ring; 5464. Switching gear; 5465. Reset spring; 5466. Guide shaft; 55. First bearing; 56. Second bearing; 6. Control mechanism. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings:

[0027] like Figures 1 to 8As shown, a wheelchair that is convenient for flexible switching between manual and automatic operation comprises a bottom body mechanism 1, a seat mechanism 2, a 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 respectively fixed to the seat mechanism 2 and the bottom body mechanism 1. The pedal mechanism 3 is fixed to the front side of the seat mechanism 2. The two ends of the push rod mechanism 5 are respectively fixed to the bottom body mechanism 1 and the folding mechanism 4, 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.

[0028] The push rod mechanism 5 includes a mounting seat 51, a driving motor 52, a push rod assembly 53 and a switching assembly 54. A connecting ear 511 is provided on one side of the outside of the mounting seat 51. The connecting ear 511 is installed on the folding mechanism 4. A mounting cavity 512 is provided in the mounting seat 51. The push rod assembly 53 is fixed on the other side of the outside of the mounting seat 51. The power output end of the push rod assembly 53 is connected to the bottom body mechanism 1. The push rod assembly 53 is provided with a driving shaft 531. The driving shaft 531 is used to drive the power output end of the push rod assembly 53. The push rod assembly 53 is also provided with The driven gear 532 is fixed on the driving shaft 531 and corresponds to the installation cavity 512. The driving motor 52 is fixed on the mounting seat 51. The driving motor 52 is provided with a driving gear 521. The driving gear 521 is fixed to the power output end of the driving motor 52 and corresponds to the installation cavity 512. The switching component 54 is fixed on the mounting seat 51 and is connected with the driving gear 521 and the driven gear 532 respectively. The switching component 54 is used to switch the driving gear 521 and the driven gear 532 to a driving state or a non-driving state.

[0029] By setting the switching component 54, it is possible to manually switch whether the driving motor 52 and the push rod component 53 are driven and connected, that is, to switch between the automatic mode and the manual mode. When the wheelchair has sufficient power, the automatic mode is used. When the wheelchair runs out of power, the manual mode is used to cut off the driving connection between the driving motor 52 and the push rod component 53, so that when the folding mechanism 4 is manually folded or unfolded, there is no need to overcome the resistance of the driving motor 52, and the folding mechanism 4 can be manually operated easily. The advantage of this design is that the wheelchair can flexibly switch between the automatic mode and the manual mode to meet different usage scenarios, bringing greater convenience to the user.

[0030] The switching assembly 54 includes a speed change 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 can be rotatably installed in the installation cavity 512. The first connecting gear 544 and the second connecting gear 545 are respectively fixed to the outside of the first rotating drum 542 and the second rotating drum 543. The speed change gear set 541 is fixed in the installation cavity 512 and meshes with 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 seat 51. The power output end of the rotating drum connecting assembly 546 is arranged in 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 into a driving connection or a non-driving connection.

[0031] The driving motor 52 drives the speed change gear set 541 to rotate through the driving gear 521, and the speed change 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 a driving connection, that is, an automatic mode, the second rotating drum 543 rotates synchronously with the first rotating drum 542, thereby driving the driven gear 532 to rotate through the second connecting gear 545, and the driven gear 532 drives the driving shaft 531 on the push rod assembly 53 to rotate, so that the power output end of the push rod assembly 53 extends or retracts, thereby 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 a non-driving connection, that is, a manual mode, the second rotating drum 543 can rotate freely, that is, it will not be affected by the resistance of the driving motor 52, thereby realizing the function of easily operating the folding mechanism 4.

[0032] The rotating drum connecting assembly 546 includes a mounting shell 5461, a manual switch 5462, a switching shaft 5463, a switching gear 5464 and a return spring 5465. The mounting shell 5461 is fixed on the mounting seat 51 and is provided with 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. The two ends of the switching gear 5464 are respectively meshed with the first internal tooth and the second internal tooth. The manual switch 5462 is fixed on the mounting shell 5461 and the power output end is slidably connected with 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 is penetrated into the second rotating drum 543. The return spring 5465 is arranged 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.

[0033] Through the manual switch 5462, the switching shaft 5463 is driven to slide in 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 cylinder 542 and the second rotating cylinder 543, the first rotating cylinder 542 and the second rotating cylinder 543 rotate synchronously. When the switching gear 5464 is only engaged with the first rotating cylinder 542, the second rotating cylinder 543 can rotate freely. The reset spring 5465 is used to reset the switching gear 5464 to be engaged with the first rotating cylinder 542 and the second rotating cylinder 543 at the same time.

[0034] 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 shell 5461. The rotating handle 54623 is fixed to the outer end of the rotating block 54621. A driving boss 546211 is provided at the inner end of the rotating block 54621. The sliding block 54622 is slidably connected to the sliding cavity 54611. A driving ramp 546221 and a contact platform 546222 are provided on the sliding block 54622. The driving boss 546211 corresponds to the driving ramp 546221. The contact platform 546222 is connected to a side of the driving ramp 546221 close to the rotating handle 54623. A driving convex ring 54631 is provided on the outer periphery of the switching shaft 5463. The driving convex ring 54631 abuts against a side of the sliding block 54622 away from the rotating handle 54623.

[0035] By turning the rotating handle 54623, the rotating block 54621 is driven to rotate at the same time, and 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 axially along the sliding cavity 54611, thereby driving the switching shaft 5463 to move axially through the driving convex ring 54631. When the driving boss 546211 moves to the abutment platform 54622, the sliding block 54622 is in the maximum ejection position, and at this time, in the absence of external force, the rotating handle 54623 will not rebound, thereby facilitating manual operation of the folding mechanism 4.

[0036] The driving bosses 546211 are symmetrically arranged in two groups on both sides of the outer periphery of the rotating block 54621 , and the driving inclined platforms 546221 and the abutting platforms 546222 are symmetrically arranged in two groups on both sides of the outer periphery of the sliding block 54622 .

[0037] This ensures that both sides of the sliding block 54622 are evenly stressed, facilitating smooth sliding of the sliding block 54622 in the sliding cavity 54611 .

[0038] The rotating drum connecting assembly 546 also includes a guide shaft 5466, which is rotatably mounted in the mounting seat 51 and passes through the first rotating drum 542, the return spring 5465, the switching gear 5464 and the switching shaft 5463 in sequence.

[0039] 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.

[0040] The push rod mechanism 5 also includes a first bearing 55 and a second bearing 56, both of which are fixed on the mounting seat 51. An annular groove 5421 is provided on the side of the first rotating cylinder 542 close to the second rotating cylinder 543, and the other side of the first rotating cylinder 542 is rotatably mounted 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, and the other side of the second rotating cylinder 543 is rotatably mounted in the second bearing 56.

[0041] Through the cooperation between the annular groove 5421 and the annular boss 5431 , the second rotating drum 543 can be partially sleeved on the first rotating drum 542 , and when the second rotating drum 543 is in a state of free rotation, it can also maintain a precise positional relationship with the first rotating drum 542 .

[0042] 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 crossbeam 45. The folding frame 41 includes a vehicle 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 vehicle body connecting frame 411 is fixed to the bottom vehicle 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 vehicle body connecting frame 411, and the upper end is hinged to the tip below the 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 vehicle body connecting frame 411, and the upper end is hinged to the tip on 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 triangular connecting frame 4 17 is hinged at the tip above the front side, the upper end of the rear lifting bracket 416 is hinged to the rear end of the seat connecting frame 412, and the lower end is hinged to the tip of the rear side of the triangular connecting frame 417, the tooth portion on the front side of the first sector gear 42 is meshed with the tooth portion on the rear side 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, 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 gear, the end of the connecting beam 45 is fixed on the gear connecting plate 44 and corresponds to the tip and tooth portion of the second gear, the folding frame 41, the first sector gear 42, the second sector gear 43 and the gear connecting plate 44 are all arranged in two groups 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, and the power output end of the push rod assembly 53 is hinged to the bottom body mechanism 1.

[0043] When the power output end of the push rod mechanism 5 is extended, the connecting beam 45 is driven to swing, thereby driving the second sector gear 43 to rotate, and the second sector gear 43 drives the first sector gear 42 to rotate, so that the front folding bracket 413 and the rear lifting bracket 416 move relative to each other, thereby driving the folding frame 41 to fold or unfold.

[0044] The above does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A wheelchair that is easy to switch between manual and automatic, characterized in that: It includes a bottom body mechanism, a seat mechanism, a pedal mechanism, a folding mechanism, a push rod mechanism and a control mechanism, wherein the upper and lower ends of the folding mechanism are respectively fixed to the seat mechanism and the bottom body mechanism, the 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, and 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 seat, a driving motor, a push rod assembly and a switching assembly, a connecting ear is provided on one side of the outside of the mounting seat, the connecting ear is installed on the folding mechanism, a mounting cavity is provided in the mounting seat, the push rod assembly is fixed to the other side of the outside of the mounting seat, the power output end of the push rod assembly is connected to the bottom body mechanism, a driving shaft is provided on the push rod assembly, and the driving shaft is used to drive the power output end of the push rod assembly, and a driven gear is also provided on the push rod assembly, and the driven gear is fixed on the driving shaft and corresponds to the mounting cavity, the driving motor is fixed on the mounting seat, and a driving gear is provided on the driving motor, and the driving gear is fixed to the power output end of the driving motor and corresponds to the mounting cavity, the switching assembly is fixed on the mounting seat and is respectively connected with the driving gear and the driven gear, and the switching assembly is used to switch the driving gear and the driven gear to a driving state or a non-driving state.

2. A wheelchair that is easy to switch between manual and automatic according to claim 1, characterized in that: The switching assembly includes a speed change 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 both 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 speed change gear set is fixed in the mounting cavity and meshes with the driving gear and the first connecting gear. The second connecting gear is meshed with the driven gear. The rotating drum connecting assembly is fixed on the mounting seat. The power output end of the rotating drum connecting assembly is penetrated in the first rotating drum and the second rotating drum, and is used to switch the first rotating drum and the second rotating drum into a drive connection or a non-drive connection.

3. A wheelchair that is easy to switch between manual and automatic according to claim 2, characterized in that: The rotating drum connecting assembly includes a mounting shell, a manual switch, a switching shaft, a switching gear and a return spring. The mounting shell is fixed on the mounting seat 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. The two ends of the switching gear are respectively meshed with the first internal tooth and the second internal tooth. The manual switch is fixed on the mounting shell and the power output end is slidably connected with the sliding cavity. One end of the switching shaft is fixed to the power output end of the manual switch, and the other end is passed through the second rotating drum. The return spring is arranged in the first rotating drum. The switching shaft and the return spring correspond to the two sides of the switching gear respectively.

4. A wheelchair that is easy to switch between manual and automatic according to claim 3, 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 shell, the rotating handle is fixed to the outer end of the rotating block, a driving boss is provided at the inner end of the rotating block, the sliding block is slidably connected to the sliding cavity, a driving ramp and a resistance platform are provided on the sliding block, the driving boss corresponds to the driving ramp, the resistance platform is connected to a side of the driving ramp close to the rotating handle, a driving convex ring is provided on the outer periphery of the switching shaft, and the driving convex ring is abutted against a side of the sliding block away from the rotating handle.

5. A wheelchair that is easy to switch between manual and automatic according to claim 4, characterized in that: The driving bosses are symmetrically arranged in two groups on both sides of the outer periphery of the rotating block, and the driving inclined platforms and the abutting platforms are symmetrically arranged in two groups on both sides of the outer periphery of the sliding block.

6. A wheelchair that is easy to switch between manual and automatic according to claim 3, characterized in that: The rotating drum connecting assembly also includes a guide shaft, which is rotatably mounted in the mounting seat and passes through the first rotating drum, the return spring, the switching gear and the switching shaft in sequence.

7. A wheelchair that is easy to switch between manual and automatic according to claim 3, characterized in that: The push rod mechanism also includes a first bearing and a second bearing, both of which are fixed on the mounting seat, an annular groove is provided on the side of the first rotating cylinder close to the second rotating cylinder, and the other side of the first rotating cylinder is rotatably mounted in the first bearing, and 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.

8. The wheelchair that is easy to switch between manual and automatic according to claim 1, characterized in that: The folding mechanism comprises a folding frame, a first sector gear, a second sector gear, a gear connecting plate and a connecting crossbeam, the folding frame comprises 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, 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 below the 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 at 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 above the front side of the triangular connecting frame, and the upper end of the rear lifting bracket is hinged to the front end of the seat connecting frame The first end is hinged to the rear end of the seat connecting frame, and the lower end is hinged to the tip of the rear side of the triangular connecting frame. The teeth on the front side of the first sector gear are meshed with the teeth on the rear side 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 gear. The end of the connecting beam is fixed to the gear connecting plate and corresponds to the tip and the teeth of the second gear. The folding frame body, the first sector gear, the second sector gear and the gear connecting plate are all arranged in two groups and correspond to the left and right sides of the connecting beam respectively. The connecting ear is hinged to the connecting beam, and the power output end of the push rod assembly is hinged to the bottom body mechanism.

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