KR100647080B1 - Auxiliary power unit starting apparatus for a wheelchair - Google Patents

Abstract

A driving device of an auxiliary power unit is provided to achieve a driving device for driving a motor to generate auxiliary driving power when a user rotates a hand wheel of a wheelchair and to be easily manufactured with a simple structure. The driving device of an auxiliary power unit of a wheelchair includes a housing(30), plural triggers(40,50), plural return springs(90), a hand wheel and a switch. Plural triggers(40,50) are fixed on triggering disks(60,70) installed on the interior surface of the housing(30). Return springs(90) are biased between the housing and the driving disk(80). The hand wheel is fixed on the driving disks(80). The switch is fixed on a stator, and is pulled by triggering disks(60,70). When a user rotates a hand wheel, triggering disk(60,70) generates auxiliary driving power for rotating the wheel of the wheelchair.

Description

Auxiliary power unit starting device for wheelchairs {AUXILIARY POWER UNIT STARTING APPARATUS FOR A WHEELCHAIR}

1 is an exploded view showing main parts according to a first preferred embodiment of the present invention;

2 is an enlarged view of FIG. 1;

3 is an enlarged view of the drive disk of FIG.

4 is an assembled view of the auxiliary power unit starting device of FIG. 2;

Fig. 5 shows a wheelchair having an auxiliary power unit starting device according to the first embodiment of the present invention.

6 is a sectional view showing an auxiliary power unit starting device before starting;

FIG. 7 is a sectional view of the auxiliary power unit starting device of FIG. 6 with the wheel moving forward; FIG.

Fig. 8 is a sectional view showing the auxiliary power unit starting device of Fig. 6 with the wheels moving backwards.

9 is an enlarged explanatory diagram showing an auxiliary power unit starting device before starting;

FIG. 10 is an enlarged explanatory diagram showing the auxiliary power unit starting device of FIG. 9 with the wheel moving forward; FIG.

FIG. 11 is an enlarged explanatory view showing the auxiliary power unit starting device of FIG. 9 with the wheels moving backward; FIG.

Figure 12 is an exploded view showing the main parts according to the second preferred embodiment of the present invention.

Figure 13 is an enlarged view of Figure 12;

Fig. 14 is a sectional view according to a second embodiment of the present invention showing an auxiliary power unit starting device before starting.

FIG. 15 is a sectional view of the auxiliary power unit starting device of FIG. 14 with the wheel moving forward; FIG.

16 is an enlarged explanatory diagram according to a second embodiment of the present invention showing the auxiliary power unit starting device before starting;

FIG. 17 is an enlarged explanatory diagram showing the auxiliary power unit starting device of FIG. 16 with the wheel moving forward; FIG.

<Explanation of symbols for main parts of the drawings>

20: wheelchair

30: housing

40: first trigger

50: second trigger

60: first triggering disk

70: second triggering disk

80: drive disk

90: return spring

100: hand wheel

200: first switch

300: second switch

[Document 1] United States Patent No. 6,230,831

[Document 2] United States Patent No. 5,818,189

[Document 3] United States Patent No. 6,354,390

[Document 4] United States Patent No. 5,878,829

The present invention relates to an auxiliary power unit starting device, in particular an auxiliary power unit starting device for a wheelchair.

US Pat. Nos. 6,230,831, 5,818,189, 6,354,390 and 5,878,829 disclose power assisted wheelchairs in which an electric motor can be rotated by a motor starting device when the user rotates the hand wheel.

According to the prior art, the maneuvering of a power assisted wheelchair is generally controlled by precision controlled electronic components or sensors. However, these electronic precision electronic devices will not only increase the cost, but also increase the failure rate.

The present invention seeks to obviate and / or mitigate the above mentioned disadvantages.

It is a primary object of the present invention to provide a starting device capable of starting a motor to generate auxiliary drive power when a user rotates a handwheel of a wheelchair. The device of the present invention is compact and simple in structure and can be easily manufactured and assembled.

1 to 6 and 9, the auxiliary power unit starting device for wheelchairs according to the first embodiment of the present invention includes a motor and a starting device disposed on both sides of the wheelchair.

Wheelchair 20 is provided with wheels 21 on both sides thereof, and at the center of wheel 21 is wheel hub 22 having an inner space for accommodating motor 23. The motor 23 is powered by a battery (not shown), the rotor 231 is fixed to the wheel hub 22 and the stator 232 of the motor 23 is the frame 201 of the wheelchair 20. Fixed to the motor 23 may be an external rotor motor, capable of rotating the wheel 21.

The starting device is arranged on one side of the hub 22 to start the motor 23, the housing 30, the plurality of first triggers 40, the plurality of second triggers 50, the first triggering. The triggering disc 60, the second triggering disc 70, the drive disc 80, the plurality of return springs 90, the hand wheel 100, the first switch 200 and the second switch 300. Include.

The housing 30 is fixed to one side of the hub 22 to cover the inner space and has a central axial hole 31. A plurality of first stepped holes 32 and second stepped holes 33 are annularly formed at different radial positions of the housing 30. On the outer surface of the housing 30 a plurality of positioning protrusions 34 and protruding blocks 35 are arranged.

Each first trigger 40 includes a thick portion 41 and a thin portion 42, and a threaded hole 43 is formed in the upper portion of the thin portion 42. A spring 44 is mounted axially on the thin portion 42, and then the thin portion 42 is set in the first stepped hole 32 of the housing 30. One end of the spring 44 abuts against the inner flange of the respective first stepped hole 32 such that the first trigger 40 is elastically installed in the first stepped hole 32.

Each second trigger 50 includes a thick portion 51 and a thin portion 52, and a threaded hole 53 is formed in the upper portion of the thin portion 52. A spring 54 is mounted axially on the thin portion 52, and then the thin portion 52 is set in the second stepped hole 33 of the housing 30. One end of the spring 54 abuts against the inner flange of the individual second stepped hole 33 so that the second trigger 50 is elastically installed in the second stepped hole 33.

The first triggering disk 60 is installed on the inner side of the housing 30, and the threaded hole 43 on the thin portion 42 of the first trigger 40 is first screwed by the screw 61. It is fixed to the surface of 60.

The second triggering disk 70 is installed on the inner side of the housing 30, and the threaded hole 53 on the thin portion 52 of the second trigger 50 is connected by the screw 71 to the second triggering disk. It is fixed to the surface of 70.

The drive disc 80 has an axial tube 81 on one side of the drive disc 80 inserted into the axial hole 31 of the housing 30, followed by a limiter 82 from the housing 30. It is disposed on the outer side of the housing 30 in a manner that is mounted at one end of the axial tube 81 to prevent the disengagement of the drive disk 80. Limiter 82 may be C-shaped. The bearing 83 is disposed between the axial tube 81 and the axial bore 31, and the limiter 82 is used to fix the bearing 83. The drive disk 80 is provided with a plurality of restriction holes 84 for mating with the protrusion 34 of the housing 30 such that the drive disk 80 rotates relative to the housing 30 within the restriction holes 84. can do. On the abutment surface of the drive disk 80 with respect to the housing 30, the housing 30 has a plurality of first chutes inclined from the shallow ends 851 and 861 toward the deep ends 852 and 862, respectively; 85 and the second chute 86 are arranged. However, the inclined direction of the first stepped chute 85 opposes the inclined direction of the second stepped chute 86. In addition, a plurality of slots 87 are formed at the outer peripheral edge of the drive disk 80.

The return spring 90 is biased between the housing 30 and the drive disk 80 in such a manner that the end of the return spring 90 abuts against the protruding block 35 of the housing 30 and the drive disk 80. Slot 87). The return spring maintains the thick portion 41 of the first trigger 40 in contact with the deep end 852 of the first chute 85, and the thick end 51 of the second trigger 50 has a second It remains in contact with the deep end 862 of the chute 86.

The hand wheel 100 has a connection portion 101 fixed to the drive disk 80 by penetrating the hand wheel 100 at the center thereof, and the hand wheel 100 moves in synchronization with the drive disk 80.

The first switch 200 is fixed to the stator 232 for starting and stopping the motor 23 and is triggered by the first triggering disk 60. When the first triggering disk 60 pulls the first switch 200, the motor 23 will be started or stopped.

The second switch 300 is fixed to the stator 232 for starting and stopping the motor 23 and is pulled by the second triggering disk 70. When the second triggering disk 70 pulls the second switch 300, the motor 23 will be started or stopped.

If the user rotates the hand wheel 100 forward (clockwise), the drive disk 80 will rotate with the hand wheel 100. Rotational travel of the drive disk 80 is limited by the restriction holes 84 and the positioning protrusions 34. When the protrusion 34 moves toward the end of the restriction hole 84, the thick portion 41 of the first trigger 40 will move from the deep end 852 of the first chute to the shallow end 851. The first trigger 40 will move towards the thin portion 42 when positioned at the shallow end 851. On the other hand, since the first triggering disk 60 is fixed with the thin portion 42 of the individual first trigger 40, the first triggering disk 60 (see FIGS. 7 and 10). Will be pushed outwards). The outward displacement of the first triggering disk 60 will pull the first switch 200, causing the motor 23 to output auxiliary rotational power. At this time, the second trigger 50 is located at the deep end 862 of the individual second chute 86, so that the second trigger disc 70 will not move outwards, and the second switch 300 It will not be pulled.

Also, when the user rotates the hand wheel 100 rearward (counterclockwise), the positioning protrusion 34 will move toward the end of the restriction hole 84, and the thick portion of the second trigger 50 ( 51 will move from the deep end 862 of the second chute 86 to the shallow end 861. The second trigger 50 will move to the thin portion 52 when positioned at the shallow end 861. On the other hand, the second triggering disk 70 is outgoing by the second trigger 50 because the second triggering disk 70 is fixed with the individual second trigger 50 (shown in FIGS. 8 and 11). Will be pushed. The outward displacement of the second triggering disk 70 will pull the second switch 300, causing the motor 23 to output auxiliary rotational power. At this time, the first trigger 60 is located at the deep end 852 of the individual first chute 85, so that the first trigger disc 60 will not move outwards, and thus the first switch 200. ) Will not be drawn.

12, 13, 14 and 16, the assisting power unit starting device for wheelchairs according to the second preferred embodiment of the present invention is activated only when the assisting power unit of the second embodiment moves the wheelchair forward. Similar to the first embodiment, except that it can be. That is, the device of this embodiment is structurally simple and includes only a plurality of stepped holes 410, a plurality of triggers 420, a triggering disk 430, a plurality of chutes 440 and a switch 450. When the user rotates the wheel forward, the trigger 420 of the chute 440 moves from the deep end 441 to the shallow end 442 (shown in FIGS. 15 and 17), thereby triggering disk 430. Causes the switch 450 to move outward to pull, so that the motor 23 will generate auxiliary drive power. It will be appreciated that the two ends of the return spring 460 are hooked to the housing 30 and the drive disk 80 respectively.

The switch is preferably a proximity switch.

According to the present invention, it is possible to provide a starting device capable of starting a motor to generate auxiliary driving power when a user rotates a hand wheel of a wheelchair. The starting device of the present invention has a compact and simple structure and can be easily manufactured and assembled.

Claims (5)

An auxiliary power unit starting device for wheelchairs including a motor and starting devices arranged on both sides of the wheelchair, The wheelchair is provided with wheels on both sides thereof, the center of the wheel has a wheel hub having an inner space for accommodating the motor, the rotor of the motor is fixed to the wheel hub, the stator of the motor is fixed to the frame of the wheelchair, The starting device disposed on one side of the hub to start the motor, A cover for covering an inner space of a wheel hub, the housing being fixed to one side of the wheel hub and having a central axial hole formed therein, wherein a plurality of first stepped holes and second stepped holes are provided at different radial positions of the housing. A housing formed in an annular shape and having a plurality of positioning protrusions arranged on an outer surface of the housing; A plurality of first triggers each comprising a thick portion and a thin portion, wherein a spring is axially mounted on the thin portion, and the thin portion is then set in the first stepped hole of the housing, such that the first trigger is A plurality of first triggers that are elastically installed in the car hole, A plurality of second triggers each comprising a thick portion and a thin portion, wherein a spring is axially mounted on the thin portion of the second trigger, and the thin portion is then set in a second stepped hole in the housing, A plurality of second triggers elastically installed in the second stepped holes, A first triggering disc installed on an inner side of a housing, the first triggering disc having a thin portion of an individual first trigger fixed to a surface of the first triggering disc, A second triggering disk installed on an inner side of the housing, the second triggering disk having a thin portion of the respective second trigger fixed to the surface of the second triggering disk; An axial tube on one side of the drive disk is inserted into the axial hole of the housing, and then the limiter is placed on one end of the axial tube to prevent disconnection of the drive disk from the housing. A drive disc disposed therein, the drive disc is provided with a plurality of restriction holes for mating with the positioning protrusions of the housing, such that the drive disk is allowed to rotate relative to the housing within the limitation of the restriction holes, On the abutting surface, a plurality of first chutes and second chutes gradually inclined from the shallow end to the deep end are arranged, and the inclination direction of the individual first stepped chute is opposed to the inclination direction of the individual second step chute chute. Drive disk, Biased between the housing and the drive disk, to maintain the thick portion of the first trigger in contact with the deep end of the first chute, and to maintain the thick portion of the second trigger in contact with the deep end of the second chute A plurality of return springs that provide an elastic force to make the A hand wheel secured to the drive disc via a connection; A first switch fixed to the stator for starting and stopping the motor and being pulled by the first triggering disc, wherein the motor is started or stopped when the first triggering disc pulls the first switch; Start-up auxiliary power unit for wheelchair comprising a second switch fixed to the stator for starting and stopping the motor and being pulled by the second triggering disk, the motor being started or stopped when the second triggering disk pulls the second switch Device. 2. The assisting power unit starting device for a wheelchair according to claim 1, wherein the bearing is disposed between the axial tube of the drive disk and the axial hole of the housing. 2. A drive according to claim 1, wherein a plurality of slots are formed at the outer circumferential edge of the drive disk, a plurality of protruding blocks are arranged on the outer surface of the housing, and the individual return springs are arranged in such a manner that one end of the return spring abuts against the protruding block. And an auxiliary power unit starting device for a wheelchair biased between the housing and the drive disk and positioned in the slot. 2. The assisting power unit starting device for a wheelchair according to claim 1, wherein the switch is a proximity switch such that the motor is started or stopped when the triggering disk moves adjacent to the proximity switch. An auxiliary power unit starting device for wheelchairs including a motor and starting devices arranged on both sides of the wheelchair, The wheelchair is provided with wheels on both sides thereof, the center of the wheel has a wheel hub having an inner space for accommodating the motor, the rotor of the motor is fixed to the wheel hub, the stator of the motor is fixed to the frame of the wheelchair, The starting device disposed on one side of the hub to start the motor, A cover for covering an inner space of a wheel hub, the housing being fixed to one side of the wheel hub and formed with a central axial hole. A plurality of stepped holes are formed in an annular shape in a radial position of the housing, and the outer surface of the housing A housing in which a plurality of positioning protrusions are arranged; A plurality of triggers, each comprising a thick portion and a thin portion, wherein a spring is axially mounted on the thin portion of the trigger, and the thin portion is then set in the stepped hole of the housing such that the trigger is elastically placed in the stepped hole. Multiple triggers, A triggering disc installed on the inner side of the housing, the triggering disc having a thin portion of the individual trigger fixed to the surface of the triggering disc, An axial tube on one side of the drive disk is inserted into the axial hole of the housing, and then the limiter is placed on one end of the axial tube to prevent disconnection of the drive disk from the housing. A drive disc disposed therein, the drive disc is provided with a plurality of restriction holes for mating with the positioning protrusions of the housing, such that the drive disk is allowed to rotate relative to the housing within the limitation of the restriction holes, On the abutting surface, a drive disk is arranged in which a plurality of chutes gradually inclined from the shallow end to the deep end, respectively, A plurality of return springs biased between the housing and the drive disk and providing an elastic force for keeping the thick portion of the trigger in contact with the deep end of the chute; A hand wheel secured to the drive disc via a connection; An auxiliary power unit starting device for a wheelchair, comprising: a switch fixed to a stator for starting and stopping a motor and pulled by a triggering disk, wherein the motor is started or stopped when the triggering disk pulls a switch.

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