CN211633974U - Middle-mounted driving electric wheelchair - Google Patents

Abstract

The middle-mounted driving electric wheelchair comprises a frame assembly, a front wheel, a driving wheel and a driving motor thereof, a rear wheel, a controller, a battery and a pedal; the frame assembly comprises a pair of large tubes, a lower frame, a pair of front fork components, a seat frame component, a backrest frame component, a pair of handrail components, a rear frame component, a ground support component and the like. The electric wheelchair runs on the ground by 3 groups of wheels including the front wheels, the driving wheels and the rear wheels, and the wheels can stably attach to the ground no matter whether the wheelchair ascends a slope, levels a road or descends the slope, so that the safety and the stability of the wheelchair are greatly improved. The folding mode is that the front and the back can be folded, the one-key switch is folded and is provided with a locking device, and the vehicle body is all linked and simultaneously acts when being folded, so that the folding function is realized. The lithium battery is adopted, and the battery pack is detachable and can be selected and matched. The handrail can be turned backwards, so that the electric wheelchair is convenient for a user to use when getting on or off the wheelchair, the handle controller can be folded, the left hand and the right hand can be interchanged, and the use function of the electric wheelchair is effectively expanded.

Description

Middle-mounted driving electric wheelchair

Technical Field

The utility model belongs to the technical field of the instrument of riding instead of walk is vehicle using motor promptly, especially put electronic wheelchair of drive in one kind.

Background

With the increasing demand for aging population with inconvenient actions and diversified trips of special disabled people, the electric wheelchair gradually becomes an indispensable tool for riding instead of walk for the people. The electric wheelchair is provided with an electric driving device on the basis of the traditional hand-push wheelchair and mainly comprises a wheelchair main frame, a driving motor, a controller and a battery. Different from traditional electric tricycles, electric vehicles, bicycles and other travel tools, the electric wheelchair has an intelligent control system, an operator can operate the electric wheelchair without the help of other people, and the electric wheelchair can realize multiple functions of independent advancing, retreating, steering, standing, lying, and the like by simple and independent operation.

Most of the existing electric wheelchair vehicles belong to basic styles, have simpler functions and can not meet more requirements of users. In the market, some wheelchairs are complex to operate, relatively single in function, large in rotation radius and heavy in weight, and the market wheelchairs are generally about 45KG (the electric wheelchairs of the invention are only 27 KG). The folding steps of the wheelchair in the market are complicated, and the wheelchair is very difficult to carry.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an in put electronic wheelchair of drive to satisfy disabled person user's demand, make the operation of wheelchair car convenient more nimble, folding step is simpler, and makes folding small, conveniently carries.

The technical scheme of the utility model

The middle-mounted driving electric wheelchair comprises a frame assembly, a front wheel, a driving wheel and a driving motor thereof, a rear wheel, a controller, a battery and a pedal; the frame assembly comprises a pair of large tubes, a lower frame, a pair of front fork components, a seat frame component, a backrest frame component, a pair of handrail components, a rear frame component and a ground support component; the rear end of each large pipe is fixedly installed with a driving motor base on a corresponding driving wheel, the front end of each large pipe is hinged with a front fork pipe in a corresponding front fork assembly, each front fork assembly is hinged with one side of the front end of a lower frame at the same time, the upper edge of the front end of each large pipe is hinged with one side of the front end of a seat frame assembly respectively, two sides of the rear end of the seat frame assembly are hinged with two sides of the middle part of a backrest frame assembly respectively, two sides of the middle part of the backrest frame assembly are hinged with the rear end of a handrail assembly respectively, the middle part of the handrail assembly is hinged with one end of a handrail supporting pipe, and the other end of the handrail supporting pipe is hinged with; the controller comprises an upper controller and a rear controller, wherein the upper controller is arranged on an armrest component; the lower end of the backrest frame component is hinged with the upper end of the rear frame component, the upper end of the ground support component is hinged with the lower end of the rear frame component through a connecting rod, two sides of the rear end of the lower frame are respectively hinged with two sides of the lower end of the rear frame component, a rear wheel is installed at the rear end of the ground support component, the rear end of the ground support component is simultaneously hinged with one end of a rear supporting gas spring, and the other end of the rear supporting gas spring is hinged with the rear end of the lower frame; the rear controller and the battery are arranged on the lower frame, and the battery is connected with the rear controller through a controller connecting wire; the rear controller is connected with the upper controller and the driving motor through a controller connecting wire.

The rear end of the large pipe is provided with a motor fixing seat used for connecting a driving motor seat, the lower edge of the front end of the large pipe is provided with a lower connecting U-shaped part used for connecting a front fork assembly, and the upper edge of the front end of the large pipe is provided with an upper connecting U-shaped part used for connecting a seat frame assembly; the front fork assembly comprises a front fork, a front fork pipe sleeved on the front fork and a front wheel installed at the lower end of the front fork, a front fork pipe rotating block is installed on the inner side of the front fork pipe, the lower end of the front fork pipe rotating block is fixed at the lower end of the front fork pipe, the middle of the front fork pipe rotating block is fixed at the upper end of the front fork pipe through an arc-shaped adjusting groove, and the upper end of the front fork pipe rotating block is hinged to a lower connecting U-shaped part of a large pipe through a rotating sleeve and a rotating shaft.

The seat frame assembly comprises a frame type seat frame main body, wherein two sides of the front end of the seat frame main body are respectively hinged with an upper connecting U-shaped part on the upper edge of the front end of the large pipe on the same side; the rear end of the seat frame main body is respectively hinged with one corresponding side of the middle part of the backrest frame component; the upper edges of two sides of the middle part of the seat frame main body are respectively provided with an armrest connecting U shape used for connecting and installing the armrest components.

The backrest frame assembly comprises a U-shaped backrest frame main body with a downward opening, two backrest connecting seats are respectively arranged on two sides of the middle part of the backrest frame main body, the lower backrest connecting seat is used for being hinged with the rear end of the seat frame main body in the seat frame assembly, and the upper backrest connecting seat is used for being hinged with the armrest assembly on the corresponding side; the lower end of the U-shaped backrest frame main body is provided with a fixed cross beam, two sides of the fixed cross beam are respectively provided with a backrest rotating seat used for being hinged with the rear frame component, and a locking and positioning mechanism used for folding and fixing the backrest frame component is arranged between the two backrest rotating seats through a locking hole on the two backrest rotating seats.

The armrest component comprises an armrest main pipe, an armrest rotating sleeve is arranged at the rear end of the armrest main pipe and is hinged with a backrest connecting seat in the backrest frame component through the rotating sleeve, the lower edge of the middle part of the armrest main pipe is hinged with the rear end of an armrest folding seat, the front end of the armrest folding seat is hinged with the upper end of an armrest supporting pipe, the lower end of the armrest supporting pipe is hinged with an armrest connecting U-shaped part in the middle of the seat frame component, and an armrest locking mechanism is arranged between the armrest folding seat and the armrest main pipe.

The handrail locking mechanism comprises a handrail locking column with a semicircular locking groove and a handrail locking spanner matched with the semicircular locking groove, the handrail locking column is fixed at the lower edge of the handrail main pipe and is tightly matched with the concave surface of the front edge of the handrail folding seat, the handrail locking spanner is arranged on the handrail folding seat and is tightly matched with the semicircular locking groove on the handrail locking column, the handrail locking spanner is also provided with a semicircular groove, when the semicircular groove on the handrail locking spanner handle is opposite to the semicircular locking groove on the handrail locking column, the whole groove is circular and leads the handrail locking mechanism to be in an opening state, when the semicircular groove on the handrail locking spanner handle and the semicircular locking groove on the handrail locking column face back, the solid column part of the handrail locking spanner is tightly matched with the semicircular locking groove on the handrail locking column, so that the handrail locking mechanism is in a closed state.

And a controller fixing seat for installing an upper controller is further fixed on the lower edge of the front end of the handrail main pipe.

The back frame subassembly include a U type back frame main part that the opening is decurrent, the blind end both sides of back frame main part respectively are provided with a fixing base, one side of fixing base is fixed with quick detach round pin stationary blade, the opposite side of fixing base is fixed with quick detach round pin locking piece, install on the back roating seat of back frame subassembly lower extreme through the quick detach round pin between quick detach round pin stationary blade and the quick detach round pin locking piece, it has two and the back to put up the locking locating hole of locking positioning mechanism complex on the subassembly to open simultaneously on the quick detach round pin locking piece, a connecting rod is installed through the connecting axle to back frame main part lower extreme opening part, the connecting axle of back frame main part lower extreme both sides is used for installing a back frame subassembly, respectively be fixed with a lower frame subassembly mount.

The ground supporting frame assembly comprises a C-shaped ground supporting frame main body, and the open ends of the ground supporting frame main body are respectively hinged to connecting shafts on two sides of the lower end of the rear frame main body; the middle part of the ground support main body is provided with a shaft sleeve, a bearing and a shaft are arranged in the shaft sleeve, and the lower end of the shaft is provided with a rear wheel through a rear wheel seat; the middle part of the ground supporting frame main body is also provided with a fixing seat, the fixing seat is hinged with one end of a rear supporting air spring through a limiting column, and the other end of the rear supporting air spring is hinged and installed at the rear end of the lower frame component.

The lower frame assembly comprises a frame main body, a battery assembly is fixedly mounted in the middle of the frame main body, a rear controller is fixedly mounted at the rear end close to the frame main body through a U-shaped frame, a mounting seat is arranged at the closed end of the U-shaped frame, the upper end of a rear supporting air spring in the support frame assembly is mounted in the mounting seat at the closed end through a quick-release pin, and two sides of the rear end of the frame main body are respectively hinged to the lower frame assembly mounting seat above the opening at the lower end of the rear frame assembly; two sides of the front end of the frame main body are respectively hinged on a front fork tube rotating block in the front fork assembly; the cross beam close to the front end of the frame main body is simultaneously provided with a pedal in a hinged mode through two fixing seats.

The utility model has the advantages and beneficial effect:

1. the product is a mid-motor-driven wheelchair, the driving is convenient and flexible, the turning radius is small, the running is stable, and the vehicle cannot be overturned on an uphill slope or a downhill slope and is safer. 2. The product is foldable, can be folded by pulling the switch with a hand, is automatically locked after being folded, can not scatter the frame, is more convenient to transport or drag, can be opened by pulling the switch with a hand when the wheelchair is opened, is very convenient and fast, and can save redundant other steps. 3. The armrests have a backward turning function, are convenient for passengers to get on and off the wheelchair for use, and have a locking function. 4. The driving motor and the controller are both driven by brushless motors, the controller is a universal remote rod controller and has the functions of adjustable acceleration and deceleration, horn button, remote control of a mobile phone and the like, the upper controller is in a four-bar structure in a telescopic and foldable mode, and operation or transportation of a user is facilitated. 5. The wheelchair has the function of a rear shock absorption wheel, can play a safety role in ascending and descending, has the function of lifting shock absorption, and is safer and more comfortable to run. 6. The pedal can be turned upwards and folded, so that a user can conveniently get on or off the bicycle or transport the bicycle for use. 7. The battery pack can be detached, and 3 sets can be selected, so that the selection options of a user are greatly increased. 8. The big pipe adopts a water injection pipe, and has beautiful and firm appearance. 9. The angle of the front fork tube can be adjusted, and the size of the front wheel can be conveniently changed and adjusted.

Drawings

Fig. 1 is a structural schematic diagram of a middle-drive electric wheelchair.

Figure 2 is a side view of a mid-drive electric wheelchair.

Fig. 3 is an exploded view of a large tube assembly of a mid-drive electric wheelchair.

Fig. 4 is an exploded view of the brushless motor assembly of the central drive electric wheelchair.

Fig. 5 is an exploded view of a mid-drive electric wheelchair seat frame assembly.

Fig. 6 is an exploded view of a center drive electric wheelchair back frame assembly.

Fig. 7 is an exploded view of a central drive electric wheelchair armrest assembly.

Fig. 8 is an exploded view of a front fork assembly of a mid-drive electric wheelchair.

Figure 9 is an exploded view of a mid-drive powered wheelchair undercarriage assembly.

Figure 10 is an exploded view of the rear frame assembly of the center drive power wheelchair.

Figure 11 is an exploded view of a center drive electric wheelchair cradle assembly.

Figure 12 is an exploded view of the controller assembly of the mid-drive powered wheelchair.

Fig. 13 is a schematic view of a mid-drive electric wheelchair pedal.

Fig. 14 is a schematic view of a battery of a mid-drive electric wheelchair.

Figure 15 is a schematic view of a fold-over locking detent mechanism.

FIG. 16 is a schematic view of the overall connection structure of the frame assembly.

FIG. 17 is a rear elevational view of the frame assembly integral attachment structure.

FIG. 18 is a frame assembly effect reference perspective view.

In the figure, 1 backrest frame, 2 armrests, 3 armrest supporting tubes, 4 locking and positioning mechanisms, 5 rear frames, 6 seat frames, 7 lower controllers, 8 middle-placed driving wheels, 9 large tubes, 10 batteries, 11 lower frames, 12 front fork tubes, 13 front forks, 14 front wheels, 15 pedals, 16 upper controllers, 17 quick-release pins, 18 brushless motors, 19 rear supporting air springs, 20 ground frames, 21 rear wheels, 22 battery frames, 23 battery handles, 24 battery plugs, 25 battery slideways, 26 quick-release pins, 27 dustproof plugs, 28 limiting columns, 29 bearing top tubes, 30 bearings, 31 shafts, 32 rear wheel seats, 33 shock-absorbing foot pads, 34 quick-release pin fixing plates, 35 quick-release pin locking plates, 36 connecting rods, 37 connecting shafts, 38 front fork tube rotating blocks, 39 adjusting jackscrews, 40 rotating sleeves, 41 large tube plugs, 42 upper connecting U-shaped blocks, 43 lower connecting U-shaped motor fixing seats, 45 connecting U-shaped connecting seats, 46 seat frame rotating sleeves, 47 rotating inner sleeve, 48 plastic bearings, 49 backrest connecting seat, 50 backrest rotating seat, 51 backrest pipe plug, 52 controller fixing seat, 53 handrail locking column, 54 handrail locking pull handle, 55 handrail folding seat, 56 handrail main pipe, 57 handrail rotating sleeve, 58 pedal rotating sleeve, 59 controller connecting wire, 60 upper controller, 61 controller gasket, 62 rotating sheet, 63 magnetic strip, 64 controller folding pipe, 65 controller pipe plug, 66 driving wheel tire, 67 fender bracket, 68 fender, 69 pull rope folding switch, 70 locking pin, 71 unfolding locking hole and 72 folding locking hole.

Detailed Description

Example 1:

the utility model provides a structure of middle-placed drive electric wheelchair is shown in figure 1 and figure 2, including frame assembly, front wheel, drive wheel and driving motor, rear wheel, controller, battery and footboard. The frame assembly comprises a pair of large tubes, a lower frame, a pair of front fork components, a seat frame component, a backrest frame component, a pair of handrail components, a rear frame component and a ground support component; the rear end of each large pipe is fixedly installed with a driving motor base on a corresponding driving wheel, the front end of each large pipe is hinged with a front fork pipe in a corresponding front fork assembly, each front fork assembly is hinged with one side of the front end of a lower frame at the same time, the upper edge of the front end of each large pipe is hinged with one side of the front end of a seat frame assembly respectively, two sides of the rear end of the seat frame assembly are hinged with two sides of the middle part of a backrest frame assembly respectively, two sides of the middle part of the backrest frame assembly are hinged with the rear end of a handrail assembly respectively, the middle part of the handrail assembly is hinged with one end of a handrail supporting pipe, and the other end of the handrail supporting pipe is hinged with; the controller comprises an upper controller and a rear controller, wherein the upper controller is arranged on an armrest component; the lower end of the backrest frame component is hinged with the upper end of the rear frame component, the upper end of the ground support component is hinged with the lower end of the rear frame component through a connecting rod, two sides of the rear end of the lower frame are respectively hinged with two sides of the lower end of the rear frame component, a rear wheel is installed at the rear end of the ground support component, the rear end of the ground support component is simultaneously hinged with one end of a rear supporting gas spring, and the other end of the rear supporting gas spring is hinged with the rear end of the lower frame; the rear controller and the battery are installed on the lower frame, the battery is connected with the rear controller through a controller connecting wire, and the rear controller is connected with the upper controller and the driving motor through a controller connecting wire.

As shown in fig. 3, the rear end of the large tube 9 is provided with a motor fixing seat 44, the motor fixing seat is fixed with a driving motor seat through mounting holes and bolts at four corners of the fixing seat, the driving wheel and driving motor safety structure is as shown in fig. 4, the brushless motor 18 is mounted on a driving wheel tire 66, the brushless motor is fixed with the large tube 9 through the motor seat, and a mudguard 68 is mounted through a mudguard support 67 on the motor seat. The lower connection U type 43 that is used for connecting the front fork subassembly is provided with to the front end lower edge of king tube, and the front end upper edge of king tube is provided with the upper connection U type 42 that is used for connecting the seat frame subassembly, and king tube block 41 is installed simultaneously to the front end of king tube, for making electronic wheelchair more pleasing to the eye, can also install a decoration cover additional at the front end of king tube, refer to fig. 1.

As shown in fig. 8, the front fork assembly includes a front fork 13, a shaft 31 is fixed on the front fork, a front fork tube 12 is sleeved on the shaft through a bearing 30, a dust plug 27 is arranged at the upper end of the front fork tube 12, and a front wheel 14 is arranged at the lower end of the front fork. The rotatory piece 38 of front fork pipe is installed to the inboard of front fork pipe, the lower extreme of the rotatory piece of front fork pipe is fixed at the front fork pipe lower extreme, the middle part of the rotatory piece of front fork pipe is passed through arc regulation recess and adjusting bolt and is fixed in the upper end of front fork pipe, the installation angle of the rotatory piece of front fork pipe and front fork pipe can be adjusted through arc regulation recess, and then the inclination of front wheel and front fork is adjusted, the upper end of the rotatory piece of front fork pipe is installed through the mounting hole and is rotated cover 40 and axis of rotation, and install on the lower connection U type 43 of main pipe (refer to figure 1) through the axis of rotation is articulated, adjust jackscrew 39 and be used for adjusting fixed axis of rotation.

As shown in fig. 5, the saddle assembly comprises a frame-type saddle main body, and a rotary sleeve is provided on each side of the front end of the saddle main body, and the rotary sleeve is engaged with the upper connecting U-shape 42 of the upper edge of the front end of the large pipe and is hinged and fixed together by a rotary inner sleeve 47 and a plastic bearing 48. A seat frame rotating sleeve 46 is respectively arranged at both sides of the rear end of the seat frame main body and is respectively hinged with the corresponding side of the middle part of the backrest frame component through the rotating sleeve (see figure 2); the upper edges of two sides of the middle part of the seat frame main body are respectively provided with an armrest connecting U-shaped part 45 for connecting and installing an armrest component.

As shown in fig. 6, the backrest frame assembly includes a U-shaped backrest frame body with a downward opening, two backrest connecting seats 49 are respectively arranged at two sides of the middle part of the backrest frame body, the lower backrest connecting seat is used for being hinged with a seat frame rotating sleeve 46 at the rear end of the seat frame body in the seat frame assembly, and the upper backrest connecting seat is used for being hinged with an armrest assembly at the corresponding side (see fig. 2); the lower extreme of U type back frame main part is equipped with fixed beam, the both sides of fixed beam respectively are provided with one and are used for with the articulated back roating seat 50 of back frame subassembly, it has two holes respectively to open on the back roating seat, preceding hole is used for articulated with the back frame subassembly for the mounting hole, the hole of back is the locking hole, install folding and fixed back frame subassembly locking positioning mechanism 4 (see figure 15) between two locking holes, this locking positioning mechanism includes a stay cord folding switch 69, a spring locking pin 70 is respectively connected at the both ends of stay cord folding switch, this locking pin cooperates with two locking positioning holes on the quick detach pin locking plate of installation on the fixing base in the back frame subassembly respectively, cooperate with unfolding locking hole 71 when the back frame subassembly is in the state of unfolding, cooperate with folding locking hole 72 when the back frame subassembly is in fold condition.

As shown in fig. 7, the armrest assembly includes an armrest main tube 56, an armrest 2 is fixedly mounted above the armrest main tube, an armrest rotating sleeve 57 is disposed at the rear end of the armrest main tube, and is hinged to the backrest connecting seat 49 at the upper portion of the backrest frame assembly through the rotating sleeve, the lower edge of the middle portion of the armrest main tube is hinged to the rear end of the armrest folding seat 55, the front end of the armrest folding seat is hinged to the upper end of the armrest supporting tube 3, the lower end of the armrest supporting tube is hinged to the armrest connecting U-shaped portion 45 at the middle portion of the seat frame assembly (see fig. 2), and an armrest locking mechanism is disposed between the armrest folding seat and the armrest main tube.

The handrail locking mechanism comprises a handrail locking column 53 with a semicircular locking groove and a handrail locking spanner 54 matched with the semicircular locking groove, the handrail locking column is fixed at the lower edge of the handrail main pipe and is tightly matched with the concave surface of the front edge of the handrail folding seat, the handrail locking spanner is installed on the handrail folding seat and is tightly matched with the semicircular locking groove on the handrail locking column, the handrail locking spanner is also provided with a semicircular groove, when the semicircular groove on the handrail locking spanner is opposite to the semicircular locking groove on the handrail locking column, the whole groove is circular and the handrail locking mechanism is in an open state, and at the moment, the handrail can be folded upwards and retracted to facilitate the up and down of a user. When the semicircular groove on the handrail locking spanner handle and the semicircular locking groove on the handrail locking column face back, the solid column part of the handrail locking spanner handle is tightly matched with the semicircular locking groove on the handrail locking column to enable the handrail locking mechanism to be in a closed state, and the handrail can be fixed. A controller fixing seat 52 for installing an upper controller 60 is also fixed on the lower edge of the front end of the handrail main pipe.

Referring to fig. 12, two ends of two controller folding tubes 64 are respectively hinged to a rotary piece 62, an upper controller 60 is mounted on the rotary piece at one end of the controller folding tube, the rotary piece at the other end is mounted on the controller fixing seat 52 at the lower edge of the handrail main tube, and the two controller folding tubes 64 and the two rotary pieces 62 form a four-bar linkage mechanism, so that the upper controller 60 can rotate around the controller fixing seat 52 to be folded.

As shown in fig. 10, the rear frame assembly includes a U-shaped rear frame main body with a downward opening, two fixing seats are respectively disposed on two sides of a closed end of the rear frame main body, a mounting hole is formed in each fixing seat, a quick-release pin fixing piece 34 is fixed on one side (inner side in the figure) of each fixing seat through a bolt, a quick-release pin locking piece 35 is fixed on the other side of each fixing seat, the quick-release pin fixing piece and the quick-release pin locking piece are fixed together through bolts, two locking positioning holes matched with a locking positioning mechanism on the rear frame assembly are simultaneously formed in each quick-release pin locking piece, and the locking positioning mechanism is as described in the front rear frame assembly (see fig. 15. Two shock absorption foot pads 33 are simultaneously arranged on the seal of the rear frame main body, the upper ends of the shock absorption foot pads are in butt joint with the transverse pipe at the rear end of the seat frame assembly and serve as supporting points, and no shaking gap is formed when the wheelchair is unfolded.

The opening at the lower end of the rear frame main body is respectively provided with a rotating sleeve, a connecting rod 36 is arranged between the two rotating sleeves through a connecting shaft 37 and a bearing in the rotating sleeve, and the outer side of the connecting shaft 37 is used for installing a ground support assembly. A lower frame component mounting seat is respectively fixed above the opening at the lower end of the rear frame main body.

As shown in fig. 11, the ground supporting frame assembly includes a C-shaped ground supporting frame main body, and the open ends of the ground supporting frame main body are respectively provided with a rotating sleeve and are mounted on the connecting shafts 37 at the two sides of the lower end of the rear frame main body through bearings. The middle part of the main body of the ground support is provided with a shaft sleeve, a bearing 30 and a shaft 31 are arranged in the shaft sleeve, the lower end of the shaft 31 is provided with a rear wheel 21 through a rear wheel seat 32, two rear wheels 21 can be arranged as shown in figure 11, the rear wheel 21 can also be provided with a front wheel of a front fork as shown in figure 16, and the specific structure is the same as that of the front wheel of the front fork in figure 8. The middle part of the ground supporting frame main body is also provided with a fixing seat which is hinged with the lower end of a limiting column 28, the upper end of the limiting column is connected with and installed with a rear supporting air spring 19, and the upper end of the rear supporting air spring 19 is hinged and installed at the rear end of the lower frame component.

As shown in fig. 9, the lower frame assembly includes a frame body (i.e., a lower frame 11), a battery mounting seat and a battery slideway 25 are provided in the middle of the frame body, the battery 10 is placed on the battery mounting seat through a battery frame 22 and the battery slideway 25, a battery handle 23 facilitates the assembly and disassembly of the battery, and the battery assembly is shown in fig. 14, wherein a battery plug 24 is fixed on the battery mounting seat of the lower frame. The rear end close to the frame main body is fixedly installed on the rear controller 7 through a U-shaped frame, the battery 10 is connected with the rear controller 7 through a battery plug 24 and a controller connecting wire, the rear controller is connected with the upper controller and the driving motor through the controller connecting wire respectively, the driving wheel is controlled through the driving motor, the closed end of the U-shaped frame is provided with a mounting seat, and the upper end of a rear supporting air spring 19 in the supporting frame assembly is hinged and installed in the mounting seat on the closed end through a quick disassembling pin 26. Two sides of the rear end of the frame main body are respectively hinged and installed on a lower frame assembly installation seat above the opening at the lower end of the rear frame assembly through a rotating sleeve, a shaft and a bearing; the two sides of the front end of the frame main body are respectively hinged on a front fork tube rotating block 38 in the front fork assembly through a rotating sleeve, a bearing and a shaft; the pedal 15 is mounted on the cross beam near the front end of the frame body through two fixing seats and a pedal rotating sleeve 58 (see fig. 13).

Finally, the whole connecting structure of the assembled frame assembly and the installation effect thereof are shown in figures 16 to 18.

Use and folding process of middle-driven electric wheelchair

Referring to fig. 15, the pull-cord folding switch 69 is pulled to disengage the locking pins 70 at both ends from the locking holes on the quick-release pin locking pieces 35, at this time, the back-rest assembly is pulled to rotate, and the lower end of the back-rest assembly drives the lower-rest assembly and the ground-rest assembly to rotate and fold through the rear-rest assembly. The middle part of the backrest frame component drives the armrest component and the seat frame component to rotate and fold, then the front fork component is driven to fold through the large pipe and the lower frame component, and the pull rope folding switch 69 is released after the backrest frame component is folded in place, so that the locking pin 70 is matched with the folding locking hole 72 on the quick-release pin locking piece 35 (see fig. 15), and the folding of the whole electric wheelchair is completed.

The pull rope folding switch 69 is pulled again to separate the locking pins 70 at the two ends from the locking positioning holes on the quick-release pin locking sheet 35, the pull rope folding switch 69 is released after the reverse operation is in place, the locking pins 70 are matched with the unfolding locking holes 71 on the quick-release pin locking sheet 35, the electric wheelchair is completely unfolded to be in an unfolding working state, and at the moment, a user can use the electric wheelchair normally.

The middle-arranged driving electric wheelchair is characterized

1. The product is characterized in that the middle drive is adopted, the driving is convenient and flexible, and the driving wheels are arranged at the center of the wheelchair and have wheels at the front and the rear, so the safety is good, the risk of backward turning is avoided, and the wheelchair is safer. The middle-mounted driving electric wheelchair runs on the ground by 3 groups of wheels including the front wheels, the driving motor and the rear wheels, and the wheels can be stably attached to the ground no matter whether the wheelchair ascends a slope, is level and descends the slope, so that the safety of the wheelchair is greatly improved.

2. The folding mode is that the front and back is collapsible, and it is convenient small to fold, and a key formula is folding and have locking device, can lock automatically after convenient folding, and this structure is most advanced convenient, and the whole linkages of automobile body are moved simultaneously when folding, realize folding function. The backrest frame component can be pulled to incline forwards, meanwhile, the armrest is driven to turn upwards when the backrest frame inclines forwards, the lower frame is pulled to move backwards simultaneously to pull the front fork to be folded, and the elastic pin can be automatically locked when the backrest frame is folded in place.

3. The lithium battery is adopted, and the battery pack is detachable and can be selected and matched.

4. The handrail can be turned backwards, so that the electric wheelchair is convenient for a user to use when getting on or off the wheelchair, the handle controller can be folded, the left hand and the right hand can be interchanged, and the use function of the electric wheelchair is effectively expanded.

Claims (10)

1. A middle-mounted driving electric wheelchair comprises a frame assembly, front wheels, driving wheels and driving motors thereof, rear wheels, a controller, a battery and pedals; the bicycle frame assembly is characterized by comprising a pair of large tubes, a lower frame component, a pair of front fork components, a seat frame component, a backrest frame component, a pair of handrail components, a rear frame component and a ground support component; the rear end of each large pipe is fixedly installed with a driving motor base on a corresponding driving wheel, the lower edge of the front end of each large pipe is hinged with a front fork pipe in a corresponding front fork assembly, each front fork assembly is hinged with one side of the front end of a lower frame assembly at the same time, the upper edge of the front end of each large pipe is hinged with one side of the front end of a seat frame assembly respectively, the two sides of the rear end of the seat frame assembly are hinged with the two sides of the middle part of a backrest frame assembly respectively, the two sides of the middle part of the backrest frame assembly are hinged with the rear end of a handrail assembly respectively, the middle part of the handrail assembly is hinged with one end of a handrail supporting pipe, and the other end of the; the controller comprises an upper controller and a rear controller, wherein the upper controller is arranged on an armrest component; the lower end of the backrest frame component is hinged with the upper end of the rear frame component, the upper end of the ground support component is hinged with the lower end of the rear frame component through a connecting rod, two sides of the rear end of the lower frame are respectively hinged with two sides of the lower end of the rear frame component, a rear wheel is installed at the rear end of the ground support component, the rear end of the ground support component is simultaneously hinged with one end of a rear supporting gas spring, and the other end of the rear supporting gas spring is hinged with the rear end of the lower frame; the rear controller and the battery are arranged on the lower frame, and the battery is connected with the rear controller through a controller connecting wire; the rear controller is connected with the upper controller and the driving motor through a controller connecting wire.

2. The mid-drive electric wheelchair as claimed in claim 1, wherein the rear end of the large tube is provided with a motor fixing seat for connecting a drive motor seat, the lower edge of the front end of the large tube is provided with a lower connecting U-shaped part for connecting a front fork assembly, and the upper edge of the front end of the large tube is provided with an upper connecting U-shaped part for connecting a seat frame assembly; the front fork assembly comprises a front fork, a front fork pipe sleeved on the front fork and a front wheel installed at the lower end of the front fork, a front fork pipe rotating block is installed on the inner side of the front fork pipe, the lower end of the front fork pipe rotating block is fixed at the lower end of the front fork pipe, the middle of the front fork pipe rotating block is fixed at the upper end of the front fork pipe through an arc-shaped adjusting groove, and the upper end of the front fork pipe rotating block is hinged to a lower connecting U-shaped part of a large pipe through a rotating sleeve and a rotating shaft.

3. The mid-drive electric wheelchair as claimed in claim 2, wherein the seat frame assembly comprises a frame-type seat frame main body, and both sides of the front end of the seat frame main body are respectively hinged with an upper connecting U-shaped part of the upper edge of the front end of the large pipe on the same side; the rear end of the seat frame main body is respectively hinged with one corresponding side of the middle part of the backrest frame component; the upper edges of two sides of the middle part of the seat frame main body are respectively provided with an armrest connecting U shape used for connecting and installing the armrest components.

4. The center-drive electric wheelchair as claimed in claim 3, wherein the back frame assembly comprises a U-shaped back frame body with a downward opening, two back connecting seats are respectively arranged at two sides of the middle part of the back frame body, the lower back connecting seat is used for being hinged with the rear end of the seat frame body in the seat frame assembly, and the upper back connecting seat is used for being hinged with the armrest assembly at the corresponding side; the lower end of the U-shaped backrest frame main body is provided with a fixed cross beam, two sides of the fixed cross beam are respectively provided with a backrest rotating seat used for being hinged with the rear frame component, and a locking and positioning mechanism used for folding and fixing the backrest frame component is arranged between the two backrest rotating seats through a locking hole on the two backrest rotating seats.

5. The center-driven electric wheelchair as claimed in claim 4, wherein the armrest assembly comprises a main armrest tube, a rotating armrest sleeve is provided at the rear end of the main armrest tube and is hinged to the backrest connecting seat of the backrest frame assembly via the rotating armrest sleeve, the lower middle edge of the main armrest tube is hinged to the rear end of the folding armrest seat, the front end of the folding armrest seat is hinged to the upper end of the armrest supporting tube, the lower end of the armrest supporting tube is hinged to the armrest connecting U-shaped seat of the middle seat frame assembly, and an armrest locking mechanism is provided between the folding armrest seat and the main armrest tube.

6. The center-driven electric wheelchair as claimed in claim 5, wherein the armrest locking mechanism comprises an armrest locking post having a semicircular locking recess formed therein, and an armrest locking handle fitted with the semicircular locking recess, the armrest locking post being fixed to a lower edge of the main armrest body and being fitted tightly with a concave surface formed at a front edge of the armrest folding seat, the armrest locking handle being mounted on the armrest folding seat and being fitted tightly with the semicircular locking recess formed in the armrest locking post, the armrest locking handle being formed with a semicircular recess, and when the semicircular recess formed in the armrest locking handle is opposed to the semicircular locking recess formed in the armrest locking post, the entire recess is formed in a circular shape and the armrest locking mechanism is in an open state, and when the semicircular recess formed in the armrest locking handle is faced back to the semicircular locking recess formed in the armrest locking post, the solid column portion of the armrest locking handle is fitted tightly with the semicircular locking recess formed in the armrest locking post and the armrest locking mechanism is locked by the armrest locking post In the closed state.

7. The mid-drive electric wheelchair as claimed in claim 5 or 6, wherein a controller fixing seat for mounting a controller is further fixed to a lower edge of the front end of the armrest main tube.

8. The center-drive electric wheelchair as claimed in claim 5, wherein the rear frame assembly comprises a U-shaped rear frame body with a downward opening, a fixing seat is disposed on each side of a closed end of the rear frame body, a quick-release pin fixing piece is fixed on one side of the fixing seat, a quick-release pin locking piece is fixed on the other side of the fixing seat, the quick-release pin fixing piece and the quick-release pin locking piece are mounted on a backrest rotating seat at the lower end of the backrest frame assembly through a quick-release pin, two locking positioning holes matched with the locking positioning mechanisms on the backrest frame assembly are simultaneously formed in the quick-release pin locking piece, a connecting rod is mounted at an opening at the lower end of the rear frame body through a connecting shaft, the connecting shafts at both sides of the lower end of the rear frame body are used for mounting the ground frame assembly, and a lower frame assembly mounting seat.

9. The mid-drive electric wheelchair as claimed in claim 8, wherein the ground supporting frame assembly comprises a C-shaped ground supporting frame body, and the open ends of the ground supporting frame body are respectively hinged to connecting shafts at two sides of the lower end of the rear frame body; the middle part of the ground support main body is provided with a shaft sleeve, a bearing and a shaft are arranged in the shaft sleeve, and the lower end of the shaft is provided with a rear wheel through a rear wheel seat; the middle part of the ground supporting frame main body is also provided with a fixing seat, the fixing seat is hinged with one end of a rear supporting air spring through a limiting column, and the other end of the rear supporting air spring is hinged and installed at the rear end of the lower frame component.

10. The mid-drive electric wheelchair as claimed in claim 9, wherein the lower frame assembly comprises a frame body, a battery assembly is fixedly mounted in the middle of the frame body, a rear controller is fixedly mounted near the rear end of the frame body through a U-shaped frame, a mounting seat is provided at the closed end of the U-shaped frame, the upper end of a rear support gas spring in the frame assembly is mounted in the mounting seat at the closed end through a quick release pin, and two sides of the rear end of the frame body are respectively hinged to the lower frame assembly mounting seat above the opening at the lower end of the rear frame assembly; two sides of the front end of the frame main body are respectively hinged on a front fork tube rotating block in the front fork assembly; the cross beam close to the front end of the frame main body is simultaneously provided with a pedal in a hinged mode through two fixing seats.

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