CN202982427U - Hand-operated wheelchair having the function of self-locking - Google Patents

The utility model discloses a hand-operated wheelchair having the function of self-locking, The hand-operated wheelchair includes a frame body, a walking wheel, a walking wheel shaft, a handwheel, and a handwheel shaft, a driven sprocket wheel and a worm gear are arranged on the walking wheel shaft, a driving sprocket wheel and a worm are arranged on the handwheel shaft, a clutch is arranged between the driving sprocket wheel and the worm, the worm is connected with the worm gear via the clutch, the driving sprocket wheel and the driven sprocket wheel are driven via a chain, and the control handle of the clutch is arranged on the frame body. When the wheelchair runs on flat road, the acceleration can be realized by the chain and the sprocket wheels, and the operation is simpler and more flexible; when the wheelchair runs on slanted road, the wheelchair is switched via the clutch, and the worm and the worm gear are switched on, and the wheelchair is self-locked when the worm gear is in the driving state, in this way, the dangers of the sliding and running of the wheelchair can be prevented.

Manual wheelchair with auto-lock function

Technical field

This utility model belongs to the technical field of wheelchair, relates in particular to a kind of manual wheelchair with auto-lock function.

Background technology

Manual wheelchair is walking-replacing tool the earliest, and it is not only the walking-replacing tool of limbs the disabled, the more important thing is to make them carry out physical exercise and participate in social activity by means of wheelchair.Light and flexible when manual wheelchair is walked on flat slope.But when tilted road surface was walked, it was unreliable to brake, and oneself can occur again during upward slope and when easily slipping car, descending slip the danger of (sport car), took to be absolutely unsafe.When tilted road surface travelled, with manual strength direct manipulation handwheel and road wheel, moment was large, and the armrest lock is braked again simultaneously, was difficult to control, therefore the easy car that slips when going up a slope during descending, sport car occurs easily.

The utility model content

The technical problems to be solved in the utility model is to provide a kind of manual wheelchair of auto-lock function, can prevent to slip car.

In order to solve the problems of the technologies described above, this utility model provides following technical scheme: a kind of manual wheelchair with auto-lock function, comprise support body, road wheel, live axle, handwheel and hand wheel shaft, driven sprocket and worm gear are installed on described live axle, drive sprocket and worm screw are installed on hand wheel shaft, are provided with clutch between drive sprocket and worm screw, worm screw is connected with worm gear by clutch, drive sprocket and driven sprocket are by chain drive, and support body is provided with the joystick of clutch.

Compared with prior art, the utility model has the advantage of: when travelling on the level land, realize speedup with chain, sprocket wheel, handle light and flexible more; When travelling on tilted road surface, switch by clutch, make the access of worm screw, worm gear, when worm gear be active, self-locking can occur, so just can prevent above-mentioned danger of slipping car and sport car.

Further, the number of teeth of described drive sprocket is greater than the number of teeth of driven sprocket, and is more laborsaving with operated by handwheel the time.

Description of drawings

Below in conjunction with drawings and Examples, technical solutions of the utility model are further illustrated:

Fig. 1 is the structural representation of the manual wheelchair embodiment of this utility model band auto-lock function.

The specific embodiment

When this utility model travels on the level land, realize speedup with chain, sprocket wheel, handle light and flexible more; When travelling on tilted road surface, switch by clutch, make the access of worm screw, worm gear, when worm gear be active, self-locking can occur, so just can prevent above-mentioned danger of slipping car and sport car.

For a person skilled in the art; under the prerequisite that does not break away from this utility model structure; can also make some distortion and improvement, these also should be considered as protection domain of the present utility model, and these can not affect effect and practical applicability that this utility model is implemented.