CN2288721Y

CN2288721Y - Universal drive shaft type wheel chair

Info

Publication number: CN2288721Y
Application number: CN 96213371
Authority: CN
Inventors: 李四马
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-09-04
Filing date: 1996-09-04
Publication date: 1998-08-26
Anticipated expiration: 2006-09-04

Abstract

The utility model relates to a universal drive shaft type wheel chair. The drive of an open-type bevel gear of a horizontal swing type driving mechanism is changed into the universal drive on the basis of an original wheelchair, namely that the other end of a driving main shaft connected with a swing arm and one end of a driven shaft of a rear chair frame are respectively connected with one end of a middle universal shaft through a crosswise connector and a pin shaft to form a double universal joint. The utility model has the advantages of high drive efficiency and labor saving in driving; meanwhile, a rear shaft which is a through shaft, an iron contracting brake wheel, two bearing brackets and a clutch device, etc. are not used, so the structure is simplified. Thus, the whole wheel chair is light and flexible, the speed of the wheel chair is improved, the wheel chair can be designed into a box-loading type so as to be convenient for circulation.

Description

Universal driven type wheel Wheel-chair

This utility model relates to the vehicles of a kind of disabled person and handicapped person use.

Existing yawing formula wheel Wheel-chair is to pass through handle; rocking arm passes to an opposite opened conical gear with power; thus drive one group of two-stage chain; the speed change gear of chain gear transmission; drive trailing wheel by turning cylinder again and rotate; its deficiency is: operation inconvenience is wasted time and energy; shake during handle normally advances in up time; when meeting resistance; as going up a slope or against the wind the time; in order to add large driving force; need rapid anti-crank handle, and reaches and keep original speed of a motor vehicle in moment and since this moment speed transmission than reducing; therefore shake frequency and be higher than frequency when normal far away, make the operator very easily tired and can not adhere to long; They are two years old, transmission efficiency is low, complex structure, its efficient of opposite opened Bevel Gear Drive is about about 0.88, and successively decreases with wearing and tearing, drives the then only surplus 8.8Kg of driven pulley as the power with 10Kg, in order to compensate its defect, need to use the speed change gear of one group of two-stage chain, chain gear transmission, make complex structure, cost strengthens; Worn and torn by dust storm, the considerable influence of environment such as rainwater corrosion reduces gear life.

The purpose of this utility model provides the higher universal driven type wheel Wheel-chair of the low easy to operate transmission efficiency of a kind of cost simple in structure.

This is taken turns before Wheel-chair comprises, back vehicle frame, the car fork, handlebar, wheel, axletree, seat on the back vehicle frame, pedal, brake unit and comprise handle and the yawing formula drive mechanism of rocking arm, it is characterized in that rocking arm and be installed in that the one end is that the other end of the active vertical shaft of forked joint is connected on the vehicle frame of back, the forked joint of middle universal drive shaft one end connects and composes Hooks coupling universal coupling by the forked joint on crosswise connector and bearing pin and the active vertical shaft, the forked joint of the driven flat shaft end on the vehicle frame connects and composes another Hooks coupling universal coupling to the forked joint of the other end of middle universal drive shaft by crosswise connector and bearing pin and after being installed in under-seat, is connected driving by the sprocket wheel link chain mechanism between driven shaft and the hind axle.

This utility model concrete structure accompanying drawings is as follows:

The universal driven type wheel of Fig. 1 Wheel-chair sketch map.

Fig. 2 yawing universal transmission mechanism sketch map.

As shown in Figure 1, this is taken turns Wheel-chair and comprises front frame 10, back vehicle frame 1, the car fork, handlebar 9, wheel 13, axletree, seat 8 on the back vehicle frame, adjustable foot controls 11, brake unit such as rim brake or foot stop lock 12 and comprise handle 2; the yawing formula drive mechanism of rocking arm 3; see Fig. 2 for details; wherein rocking arm be installed in the back vehicle frame on the one end be that the other end of the active vertical shaft 4 of forked joint is connected; the forked joint of middle universal drive shaft 5 one ends connects and composes Hooks coupling universal coupling by crosswise connector and bearing pin and forked joint on the vertical shaft initiatively; the forked joint of the forked joint of the other end of middle universal drive shaft driven flat 6 ends on the vehicle frame by crosswise connector and bearing pin and after being installed in under-seat connects and composes another Hooks coupling universal coupling, sprocket wheel 7 is installed on the driven shaft also passes through the sprocket wheel link chain mechanism and connect driving with rear axle.

The utility model advantage: 1, adopt Hooks coupling universal coupling to make transmission efficiency bring up to 0.95 or more Height can reach 9.5Kg as passing to driven shaft with 10Kg power; 2, use Hooks coupling universal coupling to pass Move and to save the additional drag of one-level chain sprocket transmission, can remove that cover chain turbine of chronotropic action Structure; 3, owing to only need the one-level chain gear transmission, can omit traditional three-wheel rear axle is axis, iron band-type brake wheel, Two bearing supporting frames, clutch apparatus etc., and the Hooks coupling universal coupling driven shaft is directly passed to plain shaft Flywheel on the skin or pin stop the sprocket wheel on the lock axle skin; 4, evidence, this mechanism improves mechanical efficiency 15%-20%; 5, this car by the single-stage chain drive, passes to the Hooks coupling universal coupling driven shaft The sprocket wheel that pin stops lock makes and advances, slides, brakes, retreats clutch etc. and all do not leave under the state of handle at hand Control is also finished; 6 these bassinet structures are simple, and knot is economized a large amount of technologies makes car load light, flexible, and the speed of a motor vehicle improves , can be designed to the vanning formula, be convenient to circulation; 7 these cars only make original open type conical gear into universal joint shaft The device transmission, all the other structures are constant, and meeting resistance also needn't anti-crank handle, and the various performances of this car are all surpassed Original similar vehicle.

Claims

1, a kind of universal driven type wheel Wheel-chair, before comprising, back vehicle frame, the car fork, handlebar, wheel, axletree, seat on the back vehicle frame, pedal, brake unit and comprise handle and the yawing formula drive mechanism of rocking arm, it is characterized in that rocking arm and be installed in that the one end is that the other end of the active vertical shaft of forked joint is connected on the vehicle frame of back, the forked joint of middle universal drive shaft one end connects and composes Hooks coupling universal coupling by the forked joint on crosswise connector and bearing pin and the active vertical shaft, the forked joint of the driven flat shaft end on the vehicle frame connects and composes another Hooks coupling universal coupling to the forked joint of the other end of middle universal drive shaft by crosswise connector and bearing pin and after being installed in under-seat, is connected driving by the sprocket wheel link chain mechanism between driven shaft and the hind axle.