CN203598133U - Hand-operated wheelchair - Google Patents

Abstract

The utility model discloses a hand-operated wheelchair vehicle, which comprises a front fork, wherein the lower end of the front fork is an inverted U-shaped socket, a front wheel is mounted in the inverted U-shaped socket at the lower end of the front fork through an built-in 3-speed-changing reversing-braking hub, the built-in 3-speed-changing reversing-braking hub is further provided with a flywheel, two sides of the upper end of the front fork is provided with swinging devices, a bottom bracket and a crankset connected with the bottom bracket are arranged between the front fork and the swinging device on one side, the crankset is connected with the flywheel through a chain, two sides of a middle sleeve of the front fork are respectively provided with a front frame through a foldable member, the front frames are provided with connecting members through the foldable members, and the connecting members are fixed to a frame of the wheelchair vehicle body through fast disassembly type hinge mechanisms arranged at the front end of the connecting members. The hand-operated wheelchair vehicle is formed by combining a wheelchair with the components, on one hand, the hand-operated wheelchair vehicle further develops and utilizes the wheelchair, and provides convenience of live for the disabled; on the other hand, the appropriation expenditure for the disabled is reduced, the cost is decreased, and the requirements on comfort, safety, control and the like of the users can be satisfied at the same time.

Description

A kind of hand-cranked wheelchair

Technical field

This utility model belongs to wheelchair technical field, relates to a kind of hand-rail type tricycle transmission device, relates in particular to a kind of hand-cranked wheelchair.

Background technology

The extremity disabled persons quantity causing due to natural disaster and vehicle accident is in recent years being on the increase, and lower limb disability people accounts for ratio greatly.Wheelchair, as lower limb disability people's walking-replacing tool, is being played the part of important role in its life.It is not only the walking-replacing tool of limbs the disabled, the more important thing is physical exercise that people with disability carries out and the essential tool of doings.In the innovative design of wheelchair, domestic also rare people's research, a large amount of is the main production and operation pattern of wheelchair producer now from abroad indiscriminately imitating or introduce with a small amount of independent research.

But, simply indiscriminately imitate and can not solve root problem.The element that lacks innovation, causes the function of wheelchair can not meet already more and more higher demand far away.Although developed many decades aspect the external research at electric wheelchair, intelligent wheel chair and production, the domestic trial that also gradually starts this respect, but the number that a fact of having to face is exactly China's lower limb disability is huge, treatment maintenance has consumed great expense, make them be difficult to bear the extra expensive price such as electric wheelchair, intelligent wheel chair, therefore manual wheelchair remains the first-selection of the disabled in the future for a long period of time with its price advantage.

In addition, manual wheelchair slower development in recent years, function singleness, use difficulty, make manual type wheelchair all cannot adapt to the needs of present stage in many-sides such as weight, intensity, manipulation, safe, comfortable, costs, it is particularly important that therefore design improved goes out a novel manual type wheelchair.

Utility model content

This utility model provides a kind of hand-cranked wheelchair in order to solve the problems of the technologies described above, and greatly reduces cost, meanwhile, meets fully user for comfortable, safety, the demand of the aspects such as manipulation.

This utility model is to be achieved through the following technical solutions:

A kind of hand-cranked wheelchair, comprise that lower end is the front fork of inverted U socket, between the lower end inverted U socket of described front fork, become by interior three the flower-drum of stopping front-wheel is installed, in three become to stop on flower-drum and be also provided with flywheel, described both sides, front fork upper end are provided with agitating device, the chain wheel that is provided with axis between the agitating device of front fork and a side and is connected with axis, between chain wheel and flywheel, be connected by chain, the both sides of the middle part sleeve of front fork are provided with front frame by folded piece respectively, front frame is provided with connector by folded piece, described connector is fixed on the vehicle frame of wheel-chair body by the fast disassembly type linkage that is arranged at its front end.

Described agitating device comprises the crank being installed on axis and the handle being connected with crank.

Described front fork comprises the hollow inverted U socket of lower end and the hollow straight tube of upper end, between hollow straight tube and hollow inverted U socket, is connected by front fork middle part sleeve.

Described front fork middle part sleeve inner is equipped with rolling bearing.

On described handle and axis, offer screw thread, the two ends of crank offer screwed hole, and the screw thread of handle and the screwed hole of crank are not dynamically connected, and the screwed hole of described crank is connected with the screw thread of axis, and axis is installed in the hollow straight tube in upper end of front fork.

Described folded piece comprises by connecting two pleated sheets that bearing pin is rotationally connected and the Eccentric earn mechamism with Quick release, the Quick release of Eccentric earn mechamism is connected with the folding end of a pleated sheet by bearing pin, the upper end of Eccentric earn mechamism is provided with quick-release handle, Eccentric earn mechamism, through after another pleated sheet, fastens two pleated sheets.

Described connector comprises connecting rod and is installed on the fast disassembly type linkage of its front end, described fast disassembly type linkage comprises and is connected the first brace arranging with connecting rod, the second brace being used in conjunction with the first brace and the Eccentric earn mechamism with Quick release; The first described brace connects by being connected bearing pin with one end of the second brace, the other end of the first brace and the second brace offers through hole, Eccentric earn mechamism is also connected with quick-release handle by connecting bearing pin, the Quick release of Eccentric earn mechamism passes the second brace and the first brace successively, and by quick-release handle, the second brace and the first brace is locked.

Compared with prior art, the utlity model has following useful technique effect:

The hand-cranked wheelchair that this utility model provides, form hand-cranked wheelchair by set up this design part on the basis of wheelchair, and become the flower-drum of stopping and realized the adjusting to the speed of a motor vehicle and brake by arranging interior three, this utility model just can form a hand-cranked wheelchair by simple combination, when greatly reducing costs, meets fully user for comfortable, safety, the demand of the aspects such as manipulation, for people with disability provides facility in life, and the funds expenditure of minimizing disabled patient.

Accompanying drawing explanation

The structural representation of the hand-cranked wheelchair that Fig. 1 provides for this utility model;

One of connecting-piece structure schematic diagram of the hand-cranked wheelchair that Fig. 2 provides for this utility model;

Two of the connecting-piece structure schematic diagram of the hand-cranked wheelchair that Fig. 3 provides for this utility model;

Three of the fast disassembly type linkage structural representation of the connector of the hand-cranked wheelchair that Fig. 4 provides for this utility model;

The connector of hand-cranked wheelchair and the syndeton schematic diagram of wheelchair body that Fig. 5 provides for this utility model;

The front-end architecture schematic diagram of the hand-cranked wheelchair that Fig. 6 provides for this utility model;

The Unclosing structure schematic diagram of the folded piece of the hand-cranked wheelchair that Fig. 7 provides for this utility model;

The closing structure schematic diagram of the folded piece of the hand-cranked wheelchair that Fig. 8 provides for this utility model;

One of folded piece connecting portion structural representation of the hand-cranked wheelchair that Fig. 9 provides for this utility model;

Two of the folded piece connecting portion structural representation of the hand-cranked wheelchair that Figure 10 provides for this utility model;

Interior three of the hand-cranked wheelchair that Figure 11 provides for this utility model becomes the planetary gear structure schematic diagram of stopping in flower-drum.

Wherein: 1 is hands handle; 2 is crank; 3 is axis; 4 is chain wheel; 5 is chain; 6 become the flower-drum of stopping for interior three; 7 is flywheel; 8 is front fork; 9 is front frame; 10 is folded piece; 11 is connector; 12 is front-wheel; 13 is wheelchair body; 14 is front fork middle part sleeve; 15 is pleated sheet; 16 for connecting bearing pin; 17 is Eccentric earn mechamism; 18 is quick-release handle; 19 is the first brace; 20 connecting rods; 21 is the second brace; 22 is Quick release; 23 for connecting bearing pin; 24 is bearing pin; 25 is Eccentric earn mechamism; 26 is quick-release handle.

The specific embodiment

Below in conjunction with accompanying drawing, this utility model is described in further detail:

Referring to Fig. 1, Fig. 6, a kind of hand-cranked wheelchair, comprises that lower end is the front fork 8 of inverted U socket, and described front fork 8 comprises the hollow inverted U socket of lower end and the hollow straight tube of upper end, between hollow straight tube and hollow inverted U socket, is connected by front fork middle part sleeve 14; Rolling bearing is equipped with in described sleeve 14 inside, front fork middle part; Between the lower end inverted U socket of described front fork 8, become by interior three the flower-drum 6 of stopping front-wheel 12 is installed, between the front fork 8 in front-wheel 12 and left side interior three becomes to stop on flower-drum 6 and is also provided with flywheel 7, described front fork 8 both sides, upper end are provided with agitating device, the handle 1 that described agitating device comprises crank 2 and is connected with crank 2; The chain wheel 4 that is provided with axis 3 between the crank 2 of front fork 8 and a side and is connected with axis 3, between chain wheel 4 and flywheel 7, be connected by chain 5, the both sides of the middle part sleeve 14 of front fork 8 are provided with front frame 9 by folded piece 10 respectively, front frame 9 is provided with connector 11 by folded piece 10, and described connector 11 is fixed on the vehicle frame of wheel-chair body 13 by the fast disassembly type linkage that is arranged at its front end.It should be noted that, the interior three described models that become the flower-drum 6 of stopping are shimanoSG3C-41, have the function of brake and speed change.

Wherein, on described handle 1 and axis 3, offer screw thread, the two ends of crank 2 offer screwed hole, and the screwed hole of the screw thread of handle 1 and crank 2 is not dynamically connected, the screwed hole of described crank 2 is connected with the screw thread of axis 3, and axis 3 is installed in the hollow straight tube in upper end of front fork 8.

Referring to Fig. 2 to Fig. 5, described connector 11 is quick dismounting hinge formula connector, described quick dismounting hinge formula connector comprises connecting rod 20 and is installed on the fast disassembly type linkage of its front end, and described fast disassembly type linkage comprises and is connected the first brace 19, the second brace 21 and the Eccentric earn mechamism 17 with Quick release 22 that arrange with connecting rod 20; The first described brace 19 and one end of the second brace 21 connect by being connected bearing pin 16, and do certain rotation along connecting bearing pin 16, the other end of the first brace 19 and the second brace 21 offers through hole, Eccentric earn mechamism 17 is also connected with quick-release handle 18 by connecting bearing pin, the Quick release 22 of Eccentric earn mechamism 17 passes the second brace 21 and the first brace 19 successively, and by quick-release handle 18, the second brace 21 and the first brace 19 is locked.Wherein, Quick release 22 is provided with screw thread through one end of the first brace 19, and screw thread is provided with the nut of same size.When use, wheel-chair can be stuck in circular open around connecting the rotation of bearing pin 16 by the second brace 21, then tighten by Eccentric earn mechamism 17, realize being connected of product and wheel-chair.

Referring to Fig. 7, Fig. 8,9,10 folded piece 10, described folded piece 10 comprises by connecting two pleated sheets 15 that bearing pin 23 is rotationally connected and the Eccentric earn mechamism 25 with Quick release, the Quick release of Eccentric earn mechamism 25 is connected with the folding end of a pleated sheet 15 by bearing pin 24, the upper end of Eccentric earn mechamism 25 is provided with quick-release handle 26, Eccentric earn mechamism 25, through after another pleated sheet 15, fastens two pleated sheets.

Realize the unlatching of front frame 9 by folded piece with closed.Hinge is that a kind of widely used lower pair connects, for curved surface contact, lower in the condition downforce of bearing same load between connected piece, thereby can transmit larger power.Its geometry is fairly simple simultaneously, easily processes and realizes.Meanwhile, front frame plays main supporting role in the structure of hand-cranked wheelchair, so chain connection can meet requirement of strength.After hinge folding, connector is fixed as one fixing with Eccentric earn mechamism 25.Because differing of eccentric cam 25 distances rotates quick-release handle, in the time far pushing away, Eccentric earn mechamism 25 can push ring, tightens round mouth, reaches axle in locking, the object of fixing vehicle body.Eccentric earn mechamism 25 simultaneously, adopts curved surface contact, and kinematic pair is less, compact conformation, and greasy property is good, and frictional behaviour is good, easily realizes.Owing to adopting folded piece folding, body frame is not affected, the same with common derailleur speed.Can select arbitrarily speed change system.Speed is not subject to fold affects, and speed ability is high.

Concrete, in the time stirring chain wheel 4, flywheel 7 rolls forward, and interior three changes are stopped flower-drum 6 according to the self-locking action of similar jack, can clip flower-drum and turn-take, and car is walked forward.In the time of brake, reversing flywheel sheet, realizes friction brake.

In brake of the present utility model part adopts, three become the flower-drum of stopping and realize, and interior three to become the flower-drum of stopping be by the brake apparatus that falls in flower-drum, and crank and transmission are reversed in the other direction and realized brake.This interior three becomes the speed change that the flower-drum of stopping realizes and meets the demand of people with disability colony, has reliable and convenience and coordinates group of handicapped's gymnastics work, and the safety of car has been played to certain effect.

Method for folding of the present utility model is:

First front frame is spent along folding point hinge place's doubling 90 of folded piece, front frame is closed up, then the connecting rod of the connector of front frame the latter half 11 20 is spent along the folding point place doubling 90 of folded piece, connector is closed up, therefore use folding mode can make object carry out concrete variation from Pure Space form, and then reduce the space occupying when initial condition, thereby play the effect of joint space-efficient.

The method for designing of interior three speed changing middle shafts:

Interior three speed changing middle shafts have three gears available: light, flat, fast, but its tradition compares and is not suitable for the use of the wheel-chair of our design, for obtaining being applicable to our reduction box, we on the basis of the 2K-H of interior three fast mechanisms planetary wheeling mechanism for this wheel-chair, we are optimized design to the parts of this mechanism, so that this modular construction is compacter, it is more convenient convenient to use.

Method for designing is as follows:

1, determine design variable

By the major parameter of analyzing influence planet circular system, consider optimal design modeling simultaneously, select small sun gear number of teeth z _a, facewidth b, modulus m is as design variable, and its dependent variable is as design constant,

That is:

X=[x ₁,x ₂,x ₃] ^T=[z _a，b，m]

2, determine object function

If planetary gear number is n, cumulative volume minimum is object function, has:

$f\left(x\right)=v_a+n{v}_x=\frac{\mathrm{\π}}{4}b(D_a^2+n{D}_x^2)=\frac{\mathrm{\π}}{4}{m}^{2}b(z_a^2+{\mathrm{nz}}_x^2)$ 1. (formula 3-1)

Wherein z _x: the planetary gear number of teeth

N: planetary gear number

B: gear tooth width

M: module

Again, ' have according to the concentric condition of planet circular system:

$z_x=\frac{z_a-z_a}{2}=\frac{\mathrm{\μ}-1}{2}{z}_a$ 2. (formula 3-2)

Wherein z _a': the large sun gear number of teeth

Z _a: the small sun gear number of teeth

μ, large sun gear and small sun gear gear ratio

2. the formula 1. formula of bringing into arranges and can obtain:

$f\left(x\right)=\frac{{\mathrm{\&pi;<figure-callout\; id="2"\; label="m"\; filenames="DEST\_PATH\_HDA0000452957510000011.png"\; state="\{\{state\}\}">m</figure-callout>}}^2{\mathrm{bz}}_a^2}{16}[4+{(\mathrm{\&mu;}-1)}^{2}n]$ 3. (formula 3-3)

Object function can be expressed as:

$f\left(x\right)=0.196x_3^2{x}_1^2{x}_2[4+{(\mathrm{\&mu;}-1)}^{2}n]$ 4. (formula 3-4)

3, determine constraints

(1) not undercut of sun gear: g ₁(x)=17-x ₁≤ 0 (formula 3-5)

(2) facewidth restrictive condition: g ₂(x)=6-x ₂≤ 0 (formula 3-6)

(6) planetary gear is in abutting connection with condition: $g_6\left(x\right)=\frac{x_1}{2}(\mathrm{\&mu;}-1)(1-\sin \frac{\mathrm{\&pi;}}{2})-x_1\sin \frac{\mathrm{\&pi;}}{n}+2<0$ (formula 3-10)

4, optimal conditions

Gear material is got 45 steel, and planetary gear number n=3 calls the fmincon function in matlab, obtains through Optimization Solution:

X ^*=[z _a, b, m]=[17.32,7.8,2.2] (formula 3-11)

Each parameter rounding has: z _a=17

b=8

m=2.5

The data that more than calculate are basis, have designed our each parameter of planetary wheeling mechanism gear.

Referring to Figure 13, single planet has two degree of freedom, so will look for a fixing next one in sun wheel planet carrier and ring gear, has so just only had one degree of freedom, has also obtained a gear ratio simultaneously.

Concrete, when planet carrier is during as driving link, do accelerated motion, when planet carrier is during as driven member, do retarded motion, in the time of any two inputs, do integral drive, in the time not fixing, do neutral gear motion.

The wheel-chair operation principle of travelling:

People is sitting on wheelchair, swinging handle 1, handle drives crank 2 to rotate around axis 3, and then drive the chain wheel 4 on axis 3 to rotate, chain wheel 4 and chain 5, by chain transmission, pass to flywheel 7 by power, and flywheel 7 drives interior three become the flower-drum 6 of stopping and rotate, and then driving front-wheel 12 to rotate around axle center, driving wheel Wheel-chair is to overtake.

This utility model is take wheelchair as basis, at product and wheelchair coupling part, connector is set, product and wheelchair are assembled into one, form a new product, therefore overcome the single problem of wheelchair function in prior art, adopt internal speed-changing, increase the convenience and the comfortableness that use driving, adopt the connected mode of quick detach rod-type, Fast Installation and the dismounting of wheel-chair and product are realized, using to fold to make object carry out concrete variation from Pure Space form, and then reduce the space occupying when initial condition, thereby play the effect of joint space-efficient, and three become the flower-drum of stopping and guaranteed the use safety of wheel-chair in installing.

This utility model has solved current Manual wheelchair vehicle in weight, intensity, and manipulation, safety, comfortable, the problem of cost, in greatly reducing costs, meets user for comfortable, safety, the demand of the aspects such as manipulation fully.This product is combined with wheelchair and is formed wheel-chair, on the one hand wheelchair is is further develop and useedd, for people with disability provides facility in life.On the other hand, reduce the funds expenditure of disabled patient.

Claims (7)

1. a hand-cranked wheelchair, it is characterized in that, comprise that lower end is the front fork (8) of inverted U socket, between the lower end inverted U socket of described front fork (8), become by interior three the flower-drum (6) of stopping front-wheel (12) is installed, in three become to stop on flower-drum (6) and be also provided with flywheel (7), described front fork (8) both sides, upper end are provided with agitating device, the chain wheel (4) that is provided with axis (3) between front fork (8) and the agitating device of a side and is connected with axis (3), between chain wheel (4) and flywheel (7), be connected by chain (5), the both sides of the middle part sleeve (14) of front fork (8) are provided with front frame (9) by folded piece (10) respectively, front frame (9) is provided with connector (11) by folded piece (10), described connector (11) is fixed on the vehicle frame of wheel-chair body (13) by the fast disassembly type linkage that is arranged at its front end.

2. hand-cranked wheelchair according to claim 1, is characterized in that, described agitating device comprises the crank (2) being installed on axis (3) and the handle (1) being connected with crank (2).

3. hand-cranked wheelchair according to claim 1, is characterized in that, described front fork (8) comprises the hollow inverted U socket of lower end and the hollow straight tube of upper end, between hollow straight tube and hollow inverted U socket, is connected by front fork middle part sleeve (14).

4. according to the hand-cranked wheelchair described in claim 1 or 3, it is characterized in that, rolling bearing is equipped with in described sleeve (14) inside, front fork middle part.

5. hand-cranked wheelchair according to claim 1, it is characterized in that, on described handle (1) and axis (3), offer screw thread, the two ends of crank (2) offer screwed hole, the screwed hole of the screw thread of handle (1) and crank (2) is not dynamically connected, the screwed hole of described crank (2) is connected with the screw thread of axis (3), and axis (3) is installed in the hollow straight tube in upper end of front fork (8).

6. hand-cranked wheelchair according to claim 1, it is characterized in that, described folded piece (10) comprises by connecting two pleated sheets (15) of being rotationally connected of bearing pin (23) and the Eccentric earn mechamism (25) with Quick release, the Quick release of Eccentric earn mechamism (25) is connected with the folding end of a pleated sheet (15) by bearing pin (24), the upper end of Eccentric earn mechamism (25) is provided with quick-release handle (26), Eccentric earn mechamism (25), through after another pleated sheet (15), fastens two pleated sheets.

7. hand-cranked wheelchair according to claim 1, it is characterized in that, described connector (11) comprises connecting rod (20) and is installed on the fast disassembly type linkage of its front end, described fast disassembly type linkage comprises and is connected the first brace (19) arranging with connecting rod (20), the second brace (21) being used in conjunction with the first brace (19) and the Eccentric earn mechamism (17) with Quick release (22); Described the first brace (19) connects by being connected bearing pin (16) with one end of the second brace (21), the other end of the first brace (19) and the second brace (21) offers through hole, Eccentric earn mechamism (17) is also connected with quick-release handle (18) by connecting bearing pin, the Quick release (22) of Eccentric earn mechamism (17) passes the second brace (21) and the first brace (19) successively, and by quick-release handle (18), the second brace (21) and the first brace (19) is locked.

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