CN201719456U

CN201719456U - Wheelchair

Info

Publication number: CN201719456U
Application number: CN2010202679809U
Authority: CN
Inventors: 刘远方
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-21
Filing date: 2010-07-21
Publication date: 2011-01-26
Anticipated expiration: 2020-07-21

Abstract

The utility model discloses a wheelchair, which mainly comprises a wheelchair part and a power assisting part, wherein both left and right sides of the wheelchair part are connected with the power assisting part; the wheelchair part mainly comprises a wheelchair frame, a handrail guide rail, a handle operation system, pushing handlebars, a gearbox, wheelchair traveling wheels, a clutch ball box I and a clutch ball box II; the handrail guide rail is arranged on the upper part of the wheelchair frame; the right lower part of the wheelchair frame is provided with the gearbox and the wheelchair traveling wheels sequentially; the outside of the gearbox is provided with the clutch ball box I and the clutch ball box II sequentially respectively; and the clutch ball box I and the clutch ball box II are respectively connected with a movable shaft I and a movable shaft II which extend out from the gear box. The wheelchair part and the power assisting part are combined, and thus, the wheelchair can travel for a longer distance; when the wheelchair part is in use independently, the disabled with only one hand can operate the wheelchair to travel; the power assisting part can be also independently used; the wheelchair can go forwards and backward; and the wheelchair does not need a power supply and can travel only by the mechanical principle.

Description

A kind of wheelchair

Technical field

This utility model relates to a kind of wheelchair, relates in particular to a kind of a kind of wheelchair that can self-service walking.

Background technology

At present, some wheelchairs of selling on city's field boundary, major part is need possess two handss to be arranged or lean on another people to help just can walk, particularly want to walk distance slightly a little further, just difficult more, as have only the people of a hands to sit the wheelchair that just can operate walking onboard, be a kind of wheelchair that the part people with disability wants.

Summary of the invention

This utility model is in order to overcome the deficiencies in the prior art, and the people who has only a hands that solution part disabled person wants sits the wheelchair that just can operate walking onboard, has invented a kind of wheelchair.

The technical scheme in the invention for solving the technical problem can be:

A kind of wheelchair mainly is made up of wheelchair portion and power-assisted portion, is connected about its wheelchair portion and power-assisted portion; Described wheelchair portion mainly is made up of wheelchair frame, handrail track, lever operated system, go-cart handle, gear-box, wheelchair road wheel, clutch ball box I and clutch ball box II, its wheelchair frame top is provided with the handrail track, the wheelchair frame right lower quadrant is disposed with gear-box and wheelchair road wheel, the gear-box outside is respectively arranged with clutch ball box I and clutch ball box II successively, clutch ball box I and clutch ball box II respectively with gear-box in the movable axis I that leans out be connected with movable axis II; Described power-assisted portion mainly is made up of power-assisted vehicle frame, gear-box, assisted walk wheel, operation handlebar, vehicle seat, vehicle seat intubate and pedal crank, its power-assisted vehicle frame top is respectively arranged with vehicle seat intubate, gear-box, vehicle seat intubate successively, two vehicle seat intubate can be inserted vehicle seat, use when operating handgrip on the vehicle using motor, vehicle seat inserts the vehicle seat intubate on the left side, use the go-cart of wheelchair portion the time, vehicle seat inserts the vehicle seat intubate on the right; Power-assisted vehicle frame the right attended operation handlebar, power-assisted vehicle frame bottom is provided with the assisted walk wheel, be provided with axle in the middle of the assisted walk wheel, assisted walk is taken turns a side and is provided with sprocket wheel, sprocket wheel is connected with gear-box upper sprocket wheel II by chain, pedal crank one end connecting pin pedal, and the other end is fastened on the sprocket shaft on the power-assisted vehicle frame, axle is connected with steering sprocket key, and the sprocket wheel on the power-assisted vehicle frame is connected by chain with gear-box upper sprocket wheel I.

The technical scheme in the invention for solving the technical problem also can be:

A kind of wheelchair, described lever operated system mainly by connecting rod, rotating sprocket wheel, handle, driving lever, mobile framework, mobile framework track, spur rack, tooth sector, turn to sprocket wheel and brakes to form, its small end is connected one by pulley and is fixed in the rectangular frame slot on the handle left side, the connecting rod lower end connects the rotating sprocket wheel by bearing pin, and the rotating sprocket wheel connects gear-box upper sprocket wheel I by chain; Handle connects driving lever, handle is made of steel pipe and round steel, round steel is in the inside of steel pipe, driving lever one end connects the round steel in the handle steel pipe, the logical pulley of the other end connects in the intermediary groove of mobile framework, be provided with groove in the middle of the mobile framework, two ends are provided with pulley, the pulley at two ends is connected with the mobile framework track slot on both sides is interior, the mobile framework left side is provided with spur rack, and corresponding spur rack is provided with tooth sector, and the tooth sector bottom is provided with sprocket wheel, sprocket wheel connects by chain and turns to sprocket wheel, brakes to be arranged on the handrail track outside to be connected with brake rubber block on the live axle by brake cable.

The technical scheme in the invention for solving the technical problem can also be:

A kind of wheelchair, described gear-box is mainly by fixed axis I, gear I, sprocket wheel I, movable axis I, movable axis gear I, movable axis gear II, gear II, gear III, movable axis II, ratchet I, ratchet II, gear IV, gear shaft I, gear V, gear VI, gear VII, gear VIII, gear shaft II, sprocket wheel II, fixed axis II and gearbox-case are formed, be disposed with fixed axis I in its gearbox-case, movable axis I, fixed axis II, movable axis II, gear shaft I and gear shaft II, fixed axis I is provided with gear I, movable axis I is provided with movable axis gear I and movable axis gear II, fixed axis II is provided with gear II and gear III, be provided with gear IV in the middle of the movable axis II, gear IV both sides are disposed with ratchet I and ratchet II respectively, two ratchet I outside, two ratchet II inside, gear shaft I is provided with gear V and gear VI, gear shaft II is provided with gear VII and gear VIII, gear I and movable axis gear II engagement, movable axis gear I and gear II engagement, gear III and gear IV engagement, the ratchet I on gear IV the right and gear V engagement, gear VI and gear VIII engagement, ratchet II and gear VII engagement, the fixed axis I that the outside right side of gear-box leans out connects sprocket wheel I, and the gear shaft II that leans out connects sprocket wheel II.

A kind of wheelchair, described clutch ball box I and clutch ball box II mainly are made up of spill box, ball base, convex box and ball, be covered with ball in its ball base two sides half slot, the spill box is threaded with the convex box, and the ball that is covered with in the half slot of ball base two sides ball in spill box and convex box are threaded the space that forms is connected in order; Described spill box inner circumferential is provided with screw thread, spill box inner bottom plane is provided with a circular hole, corresponding ball is provided with all half slots near the circular hole, ball base horizontally set one through hole, the corresponding ball in the right side is provided with all half slots, and the corresponding spill box of ball base semicircle groove face is provided with all half slots, and convex box convex cylindrical is provided with screw thread, be provided with the rectangle of a band circular hole in the middle of the convex box right side, the corresponding ball base half slot in convex box inner bottom plane is provided with all half slots.

Described a kind of wheelchair, described ratchet I and ratchet II mainly are made up of gear mass, very heavy and gear core, the inner gear core that connects of its gear mass is provided with a circular hole in the middle of the gear core, the uniform individual very heavy groove of 2-4 that is provided with in edge, be provided with very heavy in the very heavy groove, very heavy bottom is provided with a steel wire, and steel wire supports very heavy, and described gear mass is an annular, the gear teeth that are provided with on the outer shroud are commutating tooth, and the tooth that is provided with on the internal ring wall is a helical teeth.

The beneficial effects of the utility model are:

1, this utility model wheelchair portion and power-assisted portion lump together the road far away of can walking;

2, this utility model wheelchair portion uses separately and has only the people with disability of a hands just can operate walking;

3, this utility model can advance and also can fall back;

4, this utility model does not need power supply, relies on the theory of mechanics walking.

Description of drawings

Fig. 1 is the wheelchair front view

Fig. 2 is a wheelchair support front view

Fig. 3 is a wheelchair support vertical view

Fig. 4 is a wheelchair portion front view

Fig. 5 is a wheelchair portion left view

Fig. 6 is a wheelchair portion right view

Fig. 7 is a power-assisted portion front view

Fig. 8 is the gear-box front view

Fig. 9 is the gear-box right view

Figure 10 is a clutch ball box front view

Figure 11 is a clutch ball box right view

Figure 12 is ratchet figure

Figure 13 is wheel chair back front view

Figure 14 is wheel chair back left view

Figure 15 is front view before the wheelchair power-assisted portion

Figure 16 is left view before the wheelchair power-assisted portion

Figure 17 is move operation handle and gear-box connection diagram

Figure 18 is the handrail vertical view

Figure 19 turns to front view for the operating handle wheelchair moves

Figure 20 turns to vertical view for the operating handle wheelchair moves

Figure 21 turns to 45 ° of vertical views for the operating handle wheelchair moves

Among the figure: 1. wheelchair portion, 2. power-assisted portion, 3. wheelchair frame, 4. handrail track, 5. lever operated system, 6. go-cart handle, 7. gear-box, 8. wheelchair road wheel, 9. clutch ball box I, 10. clutch ball box II, 11. connecting rod, 12. rotating sprocket wheel, 13. handle, 14. driving lever, 15. mobile framework, 16. mobile framework track, 17. spur rack, 18. tooth sector, 19. turn to sprocket wheel, 20. brakes, 21. fixed axis I, 22. gear I, 23. sprocket wheel I, 24. movable axis I, 25. movable axis gear I, 26. movable axis gear II, 27. gear II, 28. gear III, 29. movable axis II, 30. ratchet I, 31. ratchet II, 32. gear IV, 33. gear shaft I, 34. gear V, 35. gear VI, 36. gear VII, 37. gear VIII, 38. gear shaft II, 39. sprocket wheel II, 40. fixed axis II, 41. gearbox-case, 43. spill box, 44. ball base, 45. convex box, 46. ball, 47. gear mass, 48. it is very heavy, 49. gear core, 50. power-assisted vehicle frame, 51. assisted walk wheel, 52. operation handlebar, 53. vehicle seat, 54. vehicle seat intubate, 55. pedal crank.

The specific embodiment

Fig. 1-Fig. 7, a kind of wheelchair mainly is made up of wheelchair portion 1 and power-assisted portion 2, and its wheelchair portion 1 is connected with power-assisted portion about 2; Described wheelchair portion 1 mainly by wheelchair frame 3, handrail track 4, lever operated system 5, go-cart 6, gear-box 7, wheelchair road wheel 8, clutch ball box I 9 and clutch ball box II 10 form, its wheelchair frame 3 tops are provided with handrail track 4, wheelchair frame 3 right lower quadrants are disposed with gear-box 7 and wheelchair road wheel 8, gear-box 7 outsides are respectively arranged with clutch ball box I 9 and clutch ball box II 10 successively, clutch ball box I 9 and clutch ball box II 10 respectively with gear-box 7 in the movable axis I that leans out be connected with movable axis II; Described power-assisted portion 2 is mainly by power-assisted vehicle frame 50, gear-box 7, assisted walk wheel 51, operation handlebar 52, vehicle seat 53, vehicle seat intubate 54 and pedal crank 55 are formed, its power-assisted vehicle frame 50 tops are respectively arranged with vehicle seat intubate 54 successively, gear-box 7, vehicle seat intubate 54, power-assisted vehicle frame 50 the right attended operation handlebars 52, power-assisted vehicle frame 50 bottoms are provided with assisted walk wheel 51, be provided with axle in the middle of the assisted walk wheel 51, assisted walk is taken turns 51 1 sides and is provided with sprocket wheel, sprocket wheel is connected with gear-box 7 upper sprocket wheels 38 by chain, pedal crank 55 1 end connecting pin pedals, the other end is fastened on the sprocket shaft on the power-assisted vehicle frame 50, axle is connected with steering sprocket key, and the sprocket wheel on the power-assisted vehicle frame 50 and gear-box 7 upper sprocket wheels 23 are connected by chain.

Figure 17-Figure 21, described lever operated system 5 mainly by connecting rod 11, rotating sprocket wheel 12, handle 13, sprocket wheel I 23, driving lever 14, mobile framework 15, mobile framework track 16, spur rack 17, tooth sector 18, turn to sprocket wheel 19 and brakes 20 to form, its connecting rod 11 upper ends are connected one by a pulley and are fixed in the rectangular frame slot on handle 13 left sides, connecting rod 11 lower ends connect rotating sprocket wheel 12 by bearing pin, and rotating sprocket wheel 12 connects gear-box upper sprocket wheel I 23 by chain; Handle 13 connects driving lever 14, handle 13 is made of steel pipe and round steel, driving lever 14 1 ends connect the round steel in the handle steel pipe, the other end connects in the mobile framework 15 intermediary grooves by pulley, be provided with groove in the middle of the mobile framework 15, two ends are provided with pulley, the pulley at two ends is connected with mobile framework track 16 grooves on both sides are interior, mobile framework 15 left sides are provided with spur rack 17, corresponding spur rack 17 is provided with tooth sector 18, tooth sector 18 bottoms are provided with sprocket wheel, connect by chain to turn to sprocket wheel 19, brakes 20 to be arranged on handrail track 4 outsides to be connected with brake rubber block on the live axle by brake cable.

Fig. 8 Fig. 9, described gear-box 7 is mainly by fixed axis I 21, gear I 22, sprocket wheel I 23, movable axis I 24, movable axis gear I 25, movable axis gear II 26, gear II 27, gear III28, movable axis II29, ratchet I 30, ratchet II 31, gear IV32, gear shaft I 33, gear V 34, gear VI35, gear VII36, gear VIII37, gear shaft II 38, sprocket wheel II 39, fixed axis II 40 and gearbox-case 41 are formed, it is characterized in that: be disposed with fixed axis I 21 in the gearbox-case 41, movable axis I 24, fixed axis II40, movable axis II29, gear shaft I 33 and gear shaft II38, fixed axis I 21 is provided with gear I 22, movable axis I 24 is provided with movable axis gear I 25 and movable axis gear II26, fixed axis II40 is provided with gear II 27 and gear III28, be provided with gear IV32 in the middle of the movable axis II 29, gear IV32 both sides are disposed with ratchet I 30 and ratchet II 31 respectively, two ratchet II 31 inside, two ratchet I 30 outside, gear shaft I 33 is provided with gear V34 and gear VI35, gear shaft II 38 is provided with gear VII36 and gear VIII37, gear I 22 and movable axis gear II 26 engagements, movable axis gear I 25 and gear II 27 engagements, gear III28 and gear IV32 engagement, the ratchet II31 on gear IV32 the right and gear V34 engagement, gear VI35 and gear VIII37 engagement, ratchet I 30 and gear VII36 engagement, the fixed axis I 21 that gear-box 7 outside right sides lean out connects sprocket wheel I 23, and the gear shaft II 38 that leans out connects sprocket wheel II39.

Figure 10 Figure 11, described clutch ball box I 9 and clutch ball box II 10 mainly are made up of spill box 43, ball base 44, convex box 45 and ball 46, be covered with ball 46 in its ball base 44 two sides half slots, spill box 43 is threaded with convex box 45, and the ball that is covered with in ball base 44 two sides half slots ball in spill box 43 and convex box 45 are threaded the space that forms is connected in order; Described spill box 43 inner circumferential are provided with screw thread, spill box 43 inner bottom planes are provided with a circular hole, corresponding ball 46 is provided with all half slots near the circular hole, ball base 44 horizontally sets one through hole, the corresponding ball 46 in the right side is provided with all half slots, ball base 44 corresponding spill box 43 semicircle groove faces are provided with all half slots, convex box 45 convex cylindricals are provided with screw thread, be provided with the rectangle of a band circular hole in the middle of convex box 45 right sides, corresponding ball base 44 half slots in convex box 45 inner bottom planes are provided with all half slots.

Figure 12, described ratchet I 30 and ratchet II 31 mainly by gear mass 47, very heavy 48 and gear core 49 form, its gear mass 47 inner gear cores 49 that connect are provided with a circular hole in the middle of the gear core 49, the uniform individual very heavy groove of 2-4 that is provided with in edge, be provided with very heavy in the very heavy groove, very heavy bottom is provided with a steel wire, and steel wire supports very heavy, and described gear mass 47 is an annular, the gear teeth that are provided with on the outer shroud are commutating tooth, and the tooth that is provided with on the internal ring wall is a helical teeth.

Figure 13 Figure 14, for the wheelchair go-cart front view and side view, has added stull in the middle of two handlebars, just can be the backrest of wheelchair.

Figure 15 Figure 16, for before the wheelchair power-assisted portion before front view and the wheelchair power-assisted portion left view, preceding handle can fold twice downwards, easy folding and unfolding.

Wheelchair portion 1 walking principle:

Figure 17 Fig. 6, the operator (also can use the right hand with left hand move left and right handle 13, being that handle operating system 5 is installed in the handrail another side) drivening rod 11 swings, the rotating sprocket wheel 12 of connecting rod 11 lower ends is constantly done the rotating campaign, rotating sprocket wheel 12 is done the rotating campaign by the sprocket wheel I 23 on the chain driven gear case 7, gear-box 7 becomes the rotating campaign into sprocket wheel II 39 unidirectional motions, sprocket wheel II 39 passes to sprocket wheel on 8 of the wheelchair road wheels to power by chain, thereby drives 8 walkings of wheelchair road wheel; When needs turn to, twisting handle 5, the pulley on the handle 5 twisting driving levers 14 is stirred mobile framework 15, and the spur rack 17 on the mobile framework 15 drives tooth sector 18, sprocket chain band movable sprocket 19 rotations below tooth sector 18, sprocket wheel 19 turns to by vertical pivot twisting wheelchair road wheel.

Power-assisted portion 2 walking principles:

Fig. 7, step on the pedal above the pedal crank 55, rotate the sprocket wheel of pedal crank 55 lower ends, the sprocket rotation direction do not limit rotating all can, the sprocket wheel of pedal crank 55 lower ends is by the sprocket wheel I 23 on the chain driven gear case 7, again by gear-box 7 break-ins, no matter i.e. sprocket wheel I 23 input is just to change or reverse, what sprocket wheel II 39 exported is the forward or reverse of requirement all the time, and output chain gear II 39 walks thereby drive road wheel 51 by the sprocket wheel on the chain drive assisted walk wheel 51.

The ratchet operation principle:

Figure 12, it is commutating tooth that profile of tooth is set on gear mass 47 cylindricals, inwall is provided with unidirectional helical teeth, when axle rotates counterclockwise, very heavy 48 withstand the coaxial rotation counterclockwise together of helical teeth on gear mass 47 inwalls, and when the axle clockwise direction rotated, the helical teeth on gear mass 47 inwalls depressed very heavy 48, gear mass 47 rotates smoothly and idle running is not done manual work, and the gear mass 47 of ratchet can only be done one-directional rotation.

Clutch ball box operation principle:

Figure 10 Figure 11, spill box 43 is threaded with convex box 45, ball base 44 is arranged in the space of spill box 43 and convex box 45 compositions, be covered with ball in the ball base 44 two sides grooves, ball base 44 rotates freely in the space that spill box 43 and convex box 45 are formed, when needs speed change or backward, operation clutch ball box upper handle, make movable axis I 23 or movable axis II29 inwards or outside when mobile, ball base 44 with movable axis I 23 or movable axis II 29 coaxial rotations, spill box 43 does not change with convex box 45, has guaranteed that movable axis I23 or movable axis II 29 move left and right normally carry out.

Gear-box 7 operation principles:

Fig. 8, in gearhousing, when sprocket wheel I 23 is input as when just changeing, gear I 22 and movable axis gear II 26 engagements, movable axis gear I 25 and gear II 27 engagements, gear III28 and gear IV32 engagement, the ratchet I 30 on the gear IV32 left side and gear VII36 engagement, ratchet II 31 idle running, sprocket wheel II 39 just is output as and changes, because be installed in four ratchets on the movable axis II 29, two ratchet I 30 counter-rotating assemblings, two ratchet II 31 are just changeing assembling, though gear VIII37 and gear VI35 engagement, gear V34 and ratchet II 31 engagement ratchet II 31 idle running are not done manual work; Should be input as when reversing by sprocket wheel I 23 together, gear I 22 and movable axis gear II 26 engagements, movable axis gear I 25 and gear II 27 engagements, gear III28 and gear IV32 engagement, the ratchet II 31 on gear IV32 the right and gear V34 engagement, gear VI35 and gear VIII37 engagement, sprocket wheel II 39 outputs are still for just changeing; Operation clutch ball box I 9 is moved to the left movable axis I 24 when the needs speed change, becomes movable axis gear I 25 and meshes for movable axis gear II 26 and gear III28 with gear II 27 engagements; Operation clutch ball box II 10 when the needs backward, II29 is moved to the left with movable axis, the ratchet II 31 on speed gear IV32 the right and the ratchet I 30 and gear V34 engagement of gear V34 engagement for gear IV32 the right, the ratchet I 30 on the speed gear IV32 left side and the ratchet II 31 and gear VII36 engagement of gear VII36 engagement for the gear IV32 left side can realize that backward travels.

Claims

1. a wheelchair mainly is made up of wheelchair portion (1) and power-assisted portion (2), it is characterized in that: be connected about wheelchair portion (1) and power-assisted portion (2); Described wheelchair portion (1) is mainly by wheelchair frame (3), handrail track (4), lever operated system (5), go-cart is (6), gear-box (7), wheelchair road wheel (8), clutch ball box I (9) and clutch ball box II (10) form, it is characterized in that: wheelchair frame (3) top is provided with handrail track (4), wheelchair frame (3) right lower quadrant is disposed with gear-box (7) and wheelchair road wheel (8), gear-box (7) outside is respectively arranged with clutch ball box I (9) and clutch ball box II (10) successively, clutch ball box I (9) and clutch ball box II (10) respectively with gear-box (7) in the movable axis I that leans out be connected with movable axis II; Described power-assisted portion (2) is mainly by power-assisted vehicle frame (50), gear-box (7), assisted walk wheel (51), operation handlebar (52), vehicle seat (53), vehicle seat intubate (54) and pedal crank (55) are formed, it is characterized in that: power-assisted vehicle frame (50) top is respectively arranged with vehicle seat intubate (54) successively, gear-box (7), vehicle seat intubate (54), power-assisted vehicle frame (50) the right attended operation handlebar (52), power-assisted vehicle frame (50) bottom is provided with assisted walk wheel (51), be provided with axle in the middle of the assisted walk wheel (51), assisted walk wheel (51) one sides are provided with sprocket wheel, sprocket wheel is connected with gear-box (7) upper sprocket wheel II (39) by chain, pedal crank (55) one end connecting pin pedals, the other end is fastened on the sprocket shaft on the power-assisted vehicle frame (50), axle is connected with steering sprocket key, and the sprocket wheel on the power-assisted vehicle frame (50) is connected by chain with gear-box (7) upper sprocket wheel I (23).

2. a kind of wheelchair according to claim 1, described lever operated system (5) is mainly by connecting rod (11), rotating sprocket wheel (12), handle (13), driving lever (14), mobile framework (15), mobile framework track (16), spur rack (17), tooth sector (18), turn to sprocket wheel (19) and brakes (20) to form, it is characterized in that: connecting rod (11) upper end is connected one by a pulley and is fixed in the rectangular frame slot on handle (13) left side, connecting rod (11) lower end connects rotating sprocket wheel (12) by bearing pin, and rotating sprocket wheel (12) connects gear-box upper sprocket wheel I (23) by chain; Handle (13) connects driving lever (14), handle (13) is made of steel pipe and round steel, driving lever (14) one ends connect the round steel in the handle steel pipe, the other end connects in the intermediary groove of mobile framework (15) by a pulley, be provided with groove in the middle of the mobile framework (15), two ends are provided with pulley, the pulley at two ends is connected with mobile framework track (16) groove on both sides is interior, mobile framework (15) left side is provided with spur rack (17), corresponding spur rack (17) is provided with tooth sector (18), tooth sector (18) bottom is provided with sprocket wheel, sprocket wheel connects by chain and turns to sprocket wheel (19), brakes (20) to be arranged on handrail track (4) outside to be connected with brake rubber block on the live axle by brake cable.

3. a kind of wheelchair according to claim 1, described gear-box (7) is mainly by fixed axis I (21), gear I (22), sprocket wheel I (23), movable axis I (24), movable axis gear I (25), movable axis gear II (26), gear II (27), gear III (28), movable axis II (29), ratchet I (30), ratchet II (31), gear IV (32), gear shaft I (33), gear V (34), gear VI (35), gear VII (36), gear VIII (37), gear shaft II (38), sprocket wheel II (39), fixed axis II (40) and gearbox-case (41) are formed, it is characterized in that: be disposed with fixed axis I (21) in the gearbox-case (41), movable axis I (24), fixed axis II (40), movable axis II (29), gear shaft I (33) and gear shaft II (38), fixed axis I (21) is provided with gear I (22), movable axis I (24) is provided with movable axis gear I (25) and movable axis gear II (26), fixed axis II (40) is provided with gear II (27) and gear III (28), be provided with gear IV (32) in the middle of the movable axis II (29), gear IV (32) both sides are disposed with ratchet I (30) and ratchet II (31) respectively, two ratchet II (31) inside, two ratchet I (30) outside, gear shaft I (33) is provided with gear V (34) and gear VI (35), gear shaft II (38) is provided with gear VII (36) and gear VIII (37), gear I (22) and movable axis gear II (26) engagement, movable axis gear I (25) and gear II (27) engagement, gear III (28) and gear IV (32) engagement, the ratchet II (31) on gear IV (32) the right and gear V (34) engagement, gear VI (35) and gear VIII (37) engagement, ratchet I (30) and gear VII (36) engagement, the fixed axis I (21) that the outside right side of gear-box (7) leans out connects sprocket wheel I (23), and the gear shaft II (38) that leans out connects sprocket wheel II (39).

4. a kind of wheelchair according to claim 1, described clutch ball box I (9) and clutch ball box II (10) mainly are made up of spill box (43), ball base (44), convex box (45) and ball (46), it is characterized in that: be covered with ball (46) in the half slot of ball base (44) two sides, spill box (43) is threaded with convex box (45), and the ball that is covered with in the half slot of ball base (44) two sides ball in spill box (43) and convex box (45) are threaded the space that forms is connected in order; Described spill box (43) inner circumferential is provided with screw thread, spill box (43) inner bottom plane is provided with a circular hole, corresponding ball (46) is provided with all half slots near the circular hole, ball base (44) horizontally set one through hole, the corresponding ball in the right side (46) is provided with all half slots, the corresponding spill box of ball base (44) (43) half slot is provided with all half slots, convex box (45) convex cylindrical is provided with screw thread, be provided with the rectangle of a band circular hole in the middle of convex box (45) right side, corresponding ball base (44) half slot in convex box (45) inner bottom plane is provided with all half slots.

5. a kind of wheelchair according to claim 1, described ratchet I (30) and ratchet II (31) mainly are made up of gear mass (47), very heavy (48) and gear core (49), it is characterized in that: the inner gear core (49) that connects of gear mass (47), one circular hole is set in the middle of the gear core (49), the uniform individual very heavy groove of 2-4 that is provided with in edge, be provided with very heavy in the very heavy groove, very heavy bottom is provided with a steel wire, steel wire supports very heavy, described gear mass (47) is an annular, the gear teeth that are provided with on the outer shroud are commutating tooth, and the tooth that is provided with on the internal ring wall is a helical teeth.