CN112515871A - Electric wheelchair convenient to cross barrier and prevent to topple over - Google Patents

Abstract

The invention discloses an electric wheelchair convenient for crossing obstacles and preventing toppling, which comprises a main body, wherein a power cavity is arranged in the main body, a motor is fixedly arranged in the power cavity, and a motor shaft which is symmetrical left and right is rotatably arranged on the motor.

Description

Electric wheelchair convenient to cross barrier and prevent to topple over

Technical Field

The invention relates to an electric wheelchair capable of conveniently crossing an obstacle and preventing toppling, and mainly relates to the technical field of electric wheelchair control.

Background

In order to ensure that a patient or a person with inconvenient legs and feet can normally go out, the conventional electric wheelchair is widely applied, the diameter of the rear wheel of the conventional electric wheelchair is far larger than that of the front wheel and the rear wheel drives the wheelchair to go forward, but when the patient needs to go over a large obstacle, the electric wheelchair is easy to block and cannot go over the large obstacle, the patient often needs to go around a road or lift the large obstacle by other people, and when the patient goes down a slope or the front inclination angle of the wheelchair is large, the gravity center of the patient taking the wheelchair can move forwards, so that the patient can be separated from the wheelchair or the wheelchair can topple forwards, and when the wheelchair runs, the wheelchair has the defects that the riding comfort of the patient is poor due to the fact that the road surface condition is complex and the bumping degree of.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an electric wheelchair which is convenient for crossing obstacles and preventing from toppling, and the problems are overcome.

The invention is realized by the following technical scheme.

The invention relates to an electric wheelchair convenient for crossing barriers and preventing toppling, which comprises a main body, wherein a power cavity is arranged in the main body, a motor is fixedly arranged in the power cavity, a bilaterally symmetrical motor shaft is rotatably arranged on the motor, one end of the bilaterally symmetrical motor shaft, which is positioned outside the power cavity, is fixedly connected with a rear travelling wheel, a first belt pulley is fixedly arranged on the left motor shaft, a first belt is sleeved on the first belt pulley, a first auxiliary power cavity is arranged on the upper side of the main body, a first rotating shaft is rotatably arranged in the first auxiliary power cavity, a second belt pulley is fixedly arranged on the first rotating shaft, the first belt pulley is in transmission connection with the second belt pulley through the first belt, a first driving gear is fixedly arranged on the first rotating shaft, and a second rotating shaft is rotatably arranged in the first auxiliary power cavity, a first bevel gear is fixedly arranged at the left end of the second rotating shaft, the first driving gear is meshed with the first bevel gear, a screw cavity is arranged in the main body, a first screw is rotatably arranged in the screw cavity, a power control box is fixedly arranged in the first screw, a first electromagnet is fixedly arranged in the power control box, a first spring is fixedly connected onto the first electromagnet, a first connecting rod is fixedly connected onto the first spring, a second bevel gear is fixedly arranged on the second rotating shaft, a third rotating shaft is rotatably arranged on the second auxiliary power cavity, a third bevel gear is fixedly arranged on the third rotating shaft, the second bevel gear is meshed with the third bevel gear, a first screw slide block is arranged on the first screw, a second connecting rod is fixedly connected to the right side of the first screw slide block, and a first driving gear is arranged in the main body, the second connecting rod extends into the first driving gear, the right side of the second connecting rod is fixedly connected with a third connecting rod, the lower side of the third connecting rod is hinged with a front driving wheel, a left control cavity is fixedly arranged on the main body, a fourth rotating shaft is rotatably arranged in the left control cavity, a third belt pulley is fixedly arranged on the fourth rotating shaft, a fourth belt pulley is fixedly arranged on the first rotating shaft, the third belt pulley and the fourth belt pulley are in transmission connection through the second belt, a second driving gear is fixedly arranged on the fourth rotating shaft, bilaterally symmetrical second screw rods are rotatably arranged in the left control cavity, first springs are respectively arranged in the bilaterally symmetrical second screw rods, a fourth bevel gear is fixedly connected to the lower side of the left first connecting rod, the second driving gear is meshed with the fourth bevel gear, and a fifth bevel gear is fixedly arranged on the second rotating shaft, a sixth bevel gear is fixedly connected to the lower side of the right first connecting rod, the fifth bevel gear is meshed with the sixth bevel gear, a second lead screw sliding block is arranged on a bilaterally symmetrical second lead screw, a first extension rod is fixedly connected to the second lead screw sliding block, a seat base is fixedly connected to the upper side of the first extension rod, a balance box is fixedly connected to the lower side of the seat base, a balance block is slidably arranged in the balance box, second springs are fixedly connected to the left side and the right side of the balance block, a displacement sensor is fixedly arranged in the balance block, a fourth connecting rod is fixedly connected to the lower side of the balance block, a first rotating shaft is fixedly connected to the lower side of the fourth connecting rod, a micro control box is fixedly arranged on the main body, a fifth rotating shaft is rotatably arranged in the micro control box, a third driving gear is fixedly arranged on the fifth rotating shaft, the lower side of the sixth rotating shaft is fixedly connected with a sixth bevel gear, the third driving gear is meshed with the sixth bevel gear, a third lead screw is arranged on the sixth rotating shaft, a second extension rod is fixedly arranged on the third lead screw, a balance box is fixedly connected to the upper side of the second extension rod, and a third spring is fixedly arranged between the balance box and the main body.

Furthermore, a spline is fixedly arranged on the first connecting rod, a spline groove is fixedly arranged on the third rotating shaft, and the spline can be buckled with the spline groove and used for transmitting power.

Furthermore, the balance block is located at the center of the balance box due to the left and right sides of the second springs on the two sides, when the equipment tilts forwards, the balance block compresses the right side, the second springs move towards the right side, at the moment, the fourth connecting rod moves rightwards to drive the rack to move rightwards, the rack moves rightwards to drive the third driving gear to rotate, the third driving gear rotates to drive the sixth rotating shaft to rotate, the sixth rotating shaft rotates to enable the second extension rod to extend, the second extension rod extends to enable the right side of the seat base to be lifted, when the equipment turns backwards, the balance block compresses the left side, the second springs move leftwards, and at the moment, the left side of the seat base is lifted by the extension of the left side second extension rod.

Further, when the main body crosses an obstacle or goes downhill, the second extension rod cannot meet the inclination adjustment of the seat base due to the fact that the inclination angle is too large, and at the moment, the second screw rod needs to be started to assist the second screw rod in adjusting the levelness of the seat base.

Furthermore, the same first springs are fixedly arranged in the bilaterally symmetrical second screw rods and the first screw rods, and the first springs can control the first connecting rods to stretch and contract so as to control the power cut-off of the left and right second screw rods and the first screw rods.

The invention has the beneficial effects that: the height of the front wheel can be controlled by the front wheel control mechanism, so that the front wheel can cross an obstacle, the practicability of the wheelchair is improved, the wheelchair is prevented from turning backwards or toppling forwards due to the fact that the inclination of the wheelchair when the wheelchair crosses the obstacle is increased by the balancing devices on the two sides, the safety of the wheelchair is improved, the center of gravity is always kept in a relatively horizontal position when the wheelchair runs on a rugged road surface by the center-of-gravity fine adjustment device, and the comfort level of taking the wheelchair is increased.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the structure a-a in fig. 1.

Fig. 3 is an enlarged schematic view of the structure at B in fig. 1.

Fig. 4 is an enlarged schematic view of the structure at C in fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-4, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The electric wheelchair convenient for crossing obstacles and preventing toppling comprises a main body 67, a power cavity 16 is arranged in the main body 67, a motor 11 is fixedly arranged in the power cavity 16, a motor shaft 12 which is bilaterally symmetrical is rotatably arranged on the motor 11, a rear travelling wheel 13 is fixedly connected to one end of the motor shaft 12 which is bilaterally symmetrical and positioned outside the power cavity 16, a first belt pulley 17 is fixedly arranged on the motor shaft 12 at the left side, a first belt 18 is sleeved on the first belt pulley 17, a first auxiliary power cavity 15 is arranged on the upper side of the main body 67, a first rotating shaft 20 is rotatably arranged in the first auxiliary power cavity 15, a second belt pulley 19 is fixedly arranged on the first rotating shaft 20, the first belt pulley 17 is in transmission connection with the second belt pulley 19 through the first belt 18, a first driving gear 21 is fixedly arranged on the first rotating shaft 20, a second rotating shaft 66 is rotatably arranged in the first auxiliary power cavity 15, a first bevel gear 65 is fixedly arranged at the left end of the second rotating shaft 66, the first driving gear 21 is engaged with the first bevel gear 65, a screw cavity 25 is arranged in the main body 67, a first screw 26 is rotatably arranged in the screw cavity 25, a power control box 28 is fixedly arranged in the first screw 26, a first electromagnet 29 is fixedly arranged in the power control box 28, a first spring 30 is fixedly connected to the first electromagnet 29, a first connecting rod 31 is fixedly connected to the first spring 30, a second bevel gear 36 is fixedly arranged on the second rotating shaft 66, a third rotating shaft 34 is rotatably arranged on the second auxiliary power cavity 63, a third bevel gear 35 is fixedly arranged on the third rotating shaft 34, the second bevel gear 36 is engaged with the third bevel gear 35, a first screw slide block 27 is arranged on the first screw 26, the right side of the first screw rod slide block 27 is fixedly connected with a second connecting rod 24, a first driving gear 21 is arranged in the main body 67, the second connecting rod 24 extends into the first driving gear 21, the right side of the second connecting rod 24 is fixedly connected with a third connecting rod 23, the lower side of the third connecting rod 23 is hinged with a front advancing wheel 22, a left control cavity 57 is fixedly arranged on the main body 67, a fourth rotating shaft 58 is rotatably arranged in the left control cavity 57, a third belt pulley 59 is fixedly arranged on the fourth rotating shaft 58, a fourth belt pulley 64 is fixedly arranged on the first rotating shaft 20, the third belt pulley 59 is in transmission connection with the fourth belt pulley 64 through the second belt 60, a second driving gear 61 is fixedly arranged on the fourth rotating shaft 58, a left and right symmetrical second screw rod 40 is rotatably arranged in the left control cavity 57, and a first spring 30 is arranged in the left and right symmetrical second screw rod 40, a fourth bevel gear 62 is fixedly connected to the lower side of the left first connecting rod 31, the second driving gear 61 is meshed with the fourth bevel gear 62, a fifth bevel gear 37 is fixedly arranged on the second rotating shaft 66, a sixth bevel gear 38 is fixedly connected to the lower side of the right first connecting rod 31, the fifth bevel gear 37 is meshed with the sixth bevel gear 38, a second lead screw slider 41 is arranged on the bilaterally symmetrical second lead screw 40, a first extension rod 42 is fixedly connected to the second lead screw slider 41, a seat base 43 is fixedly connected to the upper side of the first extension rod 42, a balance box 44 is fixedly connected to the lower side of the seat base 43, a balance weight 45 is slidably arranged in the balance box 44, second springs 47 are fixedly connected to the left and right sides of the balance weight 45, a displacement sensor 46 is fixedly arranged in the balance weight 45, and a fourth connecting rod 49 is fixedly connected to the lower side of the balance weight 45, the lower side of the fourth connecting rod 49 is fixedly connected with a first rotating shaft 20, a micro control box 70 is fixedly arranged on the main body 67, a fifth rotating shaft 52 is rotatably arranged in the micro control box 70, a third driving gear 51 is fixedly arranged on the fifth rotating shaft 52, a sixth rotating shaft 54 is rotatably arranged on the micro control box 70, a sixth bevel gear 53 is fixedly connected to the lower side of the sixth rotating shaft 54, the third driving gear 51 is meshed with the sixth bevel gear 53, a third screw 55 is arranged on the sixth rotating shaft 54, a second extension rod 56 is fixedly arranged on the third screw 55, a balance box 44 is fixedly connected to the upper side of the second extension rod 56, and a third spring 48 is fixedly arranged between the balance box 44 and the main body 67.

Advantageously, the first connecting rod 31 is fixedly provided with a spline 33, the third rotating shaft 34 is fixedly provided with a spline groove 32, and the spline 33 can be buckled with the spline groove 32 for transmitting power.

Advantageously, the counterweight 45 is located at the center of the balancing box 44 due to the left and right of the second spring 47 on both sides, when the equipment is tilted forward, the counterweight 45 compresses the right side and the second spring 47 moves to the right side, at this time, the fourth connecting rod 49 moves to the right and the rack 50 moves to the right and the third driving gear 51 rotates, the third driving gear 51 rotates and the sixth rotating shaft 54 rotates, the sixth rotating shaft 54 rotates and the second extension rod 56 extends, the second extension rod 56 extends and the right side of the seat base 43 is raised, when the equipment is tilted backward, the counterweight 45 compresses the left side and the second spring 47 moves to the left and the left side and the second extension rod 56 extends and the left side of the seat base 43 is raised.

Advantageously, when the body 67 crosses an obstacle or goes downhill, due to the excessive inclination angle, the second extension rod 56 cannot meet the inclination adjustment of the seat base 43, and the second lead screw 40 is activated to assist the adjustment of the levelness of the seat base 43.

Advantageously, the same first spring 30 is fixedly arranged in the bilaterally symmetrical second lead screw 40 and the first lead screw 26, and the first spring 30 can control the extension and contraction of the first connecting rod 31 to control the power cut-off of the left and right second lead screws 40 and the first lead screws 26 thereof.

Sequence of mechanical actions of the whole device:

1. starting the motor 11, rotating the left and right motor shafts 12 to drive the rear traveling wheel 13 to rotate, driving the wheelchair to move forward, and when needing to cross an obstacle, powering off the first electromagnet 29 in the power control box 28 connected to the upper side of the first screw rod 26, at this time, engaging the third bevel gear 35 with the second bevel gear 36, rotating the left motor shaft 12 to drive the first belt pulley 17 to rotate, rotating the first belt pulley 17 to drive the second belt pulley 19 to rotate, rotating the second belt pulley 19 to drive the first rotating shaft 20 to rotate, rotating the first rotating shaft 20 to drive the first driving gear 21 to rotate, rotating the first driving gear 21 to drive the first bevel gear 65 to rotate, rotating the first bevel gear 65 to drive the second rotating shaft 66 to rotate, rotating the second rotating shaft 66 to drive the second bevel gear 36 to rotate, rotating the second bevel gear 36 to drive the third bevel gear 35 to rotate, rotating the third bevel gear 35 to drive the first screw rod 26 to rotate, the first screw rod 26 rotates to drive the first screw rod slide block 27 to move upwards, the first screw rod slide block 27 moves upwards to drive the front travelling wheel 22 to move upwards, and the rear travelling wheel 13 rotates to push the wheelchair to move rightwards to cross an obstacle.

2. When the center of the current traveling wheel 22 is on the left side of the obstacle, the wheelchair inclines to the left side, the counterweight 45 rolls to the left side, the displacement sensor 46 records the rolling distance of the counterweight 45, the power failure of the first electromagnet 29 in the second lead screw 40 on the left side is controlled, at the moment, the fourth bevel gear 62 is meshed with the second driving gear 61, the fourth belt pulley 64 rotates to drive the third belt pulley 59 to rotate, the third belt pulley 59 rotates to drive the fourth rotating shaft 58 to rotate, the fourth rotating shaft 58 rotates to drive the second driving gear 61 to rotate, the second driving gear 61 rotates to drive the fourth bevel gear 62 to rotate, the fourth bevel gear 62 rotates to drive the second lead screw 40 to rotate, the second lead screw 40 rotates to drive the second lead screw slider 41 on the left side to lift upwards, the second lead screw slider 41 on the left side rises upwards to drive the seat base 43 on the left side to lift upwards, when the displacement sensor 46 detects that the counterweight 45 returns to, when the center of current travelling wheel 22 is on the barrier right side, the wheelchair inclines to the right, balancing piece 45 rolls to the right, make the outage of first electro-magnet 29 in the right side second lead screw 40 this moment, fifth bevel gear 37 and the meshing of sixth bevel gear 38, second pivot 66 rotates and drives fifth bevel gear 37 and rotate, fifth bevel gear 37 rotates and drives sixth bevel gear 38 and rotate, sixth bevel gear 38 rotates and drives right side second lead screw 40 and rotate, right side second lead screw 40 rotates and drives right side second lead screw slider 41 and rise, right side second lead screw slider 41 rises and drives seat base 43 right side and rise, when displacement sensor 46 detected balancing piece 45 and got back to initial position, make the circular telegram of first electro-magnet 29 in the right side second lead screw 40.

3. When the vehicle runs on a rugged road, the rack 50 is driven to move left and right by rolling of the balance weight 45, the rack 50 moves left and right to drive the third driving gears 51 in the left and right micro control boxes 70 to rotate, the third driving gears 51 rotate to drive the sixth bevel gear 53 to rotate, the sixth bevel gear 53 rotates to drive the sixth rotating shaft 54 to rotate, the sixth rotating shaft 54 rotates to drive the third screw rod 55 to ascend, the third screw rod 55 ascends to drive the left side or the right side of the balance box 44 to ascend, and the seat base 43 is enabled to be kept in a horizontal state all the time.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (5)

1. An electric wheelchair facilitating crossing of obstacles and preventing toppling, characterized in that: the power transmission device comprises a main body, wherein a power cavity is arranged in the main body, a motor is fixedly arranged in the power cavity, bilaterally symmetrical motor shafts are rotatably arranged on the motor, a rear travelling wheel is fixedly connected to one end, which is positioned outside the power cavity, of each bilaterally symmetrical motor shaft, a first belt pulley is fixedly arranged on the left motor shaft, a first belt is sleeved on each first belt pulley, a first auxiliary power cavity is arranged at the upper side of the main body, a first rotating shaft is rotatably arranged in each first auxiliary power cavity, a second belt pulley is fixedly arranged on each first rotating shaft, each first belt pulley is in transmission connection with each second belt pulley through the corresponding first belt, a first driving gear is fixedly arranged on each first rotating shaft, a second rotating shaft is rotatably arranged in each first auxiliary power cavity, a first bevel gear is fixedly arranged at the left end of each second rotating shaft, and the first driving gear is meshed with the first bevel gear, a screw rod cavity is arranged in the main body, a first screw rod is rotatably arranged in the screw rod cavity, a power control box is fixedly arranged in the first screw rod, a first electromagnet is fixedly arranged in the power control box, a first spring is fixedly connected to the first electromagnet, a first connecting rod is fixedly connected to the first spring, a second bevel gear is fixedly arranged on the second rotating shaft, a third rotating shaft is rotatably arranged on the second auxiliary power cavity, a third bevel gear is fixedly arranged on the third rotating shaft and meshed with the second bevel gear, a first screw rod sliding block is arranged on the first screw rod, a second connecting rod is fixedly connected to the right side of the first screw rod sliding block, a first driving gear is arranged in the main body, the second connecting rod extends into the first driving gear, and a third connecting rod is fixedly connected to the right side of the second connecting rod, a front driving wheel is hinged to the lower side of the third connecting rod, a left control cavity is fixedly arranged on the main body, a fourth rotating shaft is rotatably arranged in the left control cavity, a third belt pulley is fixedly arranged on the fourth rotating shaft, a fourth belt pulley is fixedly arranged on the first rotating shaft, the third belt pulley is in transmission connection with the fourth belt pulley through the second belt, a second driving gear is fixedly arranged on the fourth rotating shaft, bilaterally symmetrical second screw rods are rotatably arranged in the left control cavity, first springs are respectively arranged in the bilaterally symmetrical second screw rods, a fourth bevel gear is fixedly connected to the lower side of the left first connecting rod, the second driving gear is meshed with the fourth bevel gear, a fifth bevel gear is fixedly arranged on the second rotating shaft, a sixth bevel gear is fixedly connected to the lower side of the right first connecting rod, and the fifth bevel gear is meshed with the sixth bevel gear, a second screw rod sliding block is arranged on the second screw rods which are bilaterally symmetrical, a first extension rod is fixedly connected onto the second screw rod sliding block, a seat base is fixedly connected onto the upper side of the first extension rod, a balance box is fixedly connected onto the lower side of the seat base, a balance block is arranged in the balance box in a sliding manner, second springs are fixedly connected onto the left side and the right side of the balance block, a displacement sensor is fixedly arranged in the balance block, a fourth connecting rod is fixedly connected onto the lower side of the balance block, a first rotating shaft is fixedly connected onto the lower side of the fourth connecting rod, a micro control box is fixedly arranged on the main body, a fifth rotating shaft is rotatably arranged in the micro control box, a third driving gear is fixedly arranged on the fifth rotating shaft, a sixth rotating shaft is rotatably arranged on the micro control box, a sixth bevel gear is fixedly connected onto the lower side, and a third screw rod is arranged on the sixth rotating shaft, a second extension rod is fixedly arranged on the third screw rod, a balance box is fixedly connected to the upper side of the second extension rod, and a third spring is fixedly arranged between the balance box and the main body.

2. An electric wheelchair as claimed in claim 1, wherein the wheelchair comprises: the first connecting rod is fixedly provided with a spline, the third rotating shaft is fixedly provided with a spline groove, and the spline can be buckled with the spline groove and used for transmitting power.

3. An electric wheelchair as claimed in claim 1, wherein the wheelchair comprises: the balance block is positioned at the center of the balance box due to the left and right sides of the second springs on the two sides, when the equipment tilts forwards, the balance block compresses the right side, the second springs move towards the right side, the fourth connecting rod moves rightwards to drive the rack to move rightwards, the rack moves rightwards to drive the third driving gear to rotate, the third driving gear rotates to drive the sixth rotating shaft to rotate, the sixth rotating shaft rotates to enable the second extension rod to extend, the second extension rod extends to enable the right side of the seat base to rise, when the equipment turns backwards, the balance block compresses the left side, the second springs move leftwards, and the left side second extension rod extends to enable the left side of the seat base to rise.

4. An electric wheelchair as claimed in claim 1, wherein the wheelchair comprises: when the main part was crossed the obstacle, perhaps because inclination is too big when the downhill path, lead to the second elongation pole can't satisfy the inclination adjustment of seat base, need start the second lead screw this moment, supplementary its levelness of adjusting the seat base.

5. An electric wheelchair as claimed in claim 1, wherein the wheelchair comprises: the left and right symmetrical second screw rods are fixedly provided with the same first springs as the first screw rods, and the first springs can control the first connecting rods to stretch and retract so as to control the power cut-off of the left and right second screw rods and the first screw rods.

Images