CN217908200U

CN217908200U - Wheelchair ladder climbing mechanism and wheelchair

Info

Publication number: CN217908200U
Application number: CN202221231923.4U
Authority: CN
Inventors: 施明明; 万敏俊; 刘会敏; 张永杰
Original assignee: Shanghai Qinda Technology Co ltd
Current assignee: Shanghai Qinda Technology Co ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2022-11-29
Anticipated expiration: 2032-05-13

Abstract

The utility model belongs to the technical field of wheelchair equipment manufacturing, specifically be a wheelchair cat ladder mechanism and wheelchair, the camera comprises a supporting plate, be equipped with decurrent bracing piece in the backup pad, the one end of keeping away from the backup pad on the bracing piece is radially rotated and is equipped with the pivot, pivot perpendicular to bracing piece left side wall, the left and right sides of backup pad front end respectively is equipped with a decurrent first telescopic link, the both ends of pivot respectively rotate and are equipped with a track frame, the front end of every track frame corresponds and rotates with the one end of keeping away from the backup pad on a first telescopic link and be connected, all be equipped with the track through guide pulley group in the one side of carrying on the back between two track frames, the axis of all guide pulleys in the guide pulley group is on a parallel with the axis of pivot, the rear end of backup pad is equipped with the auxiliary wheel through telescopic machanism, the auxiliary wheel is located between two track frames, the common fixedly connected with connecting rod of anterior segment of two track frame one side in opposite directions, be equipped with crawler drive arrangement on the track frame, the problem that present wheelchair can only travel on the ground and can not the cat ladder has been solved.

Description

Wheelchair cat ladder mechanism and wheelchair

Technical Field

The utility model belongs to the technical field of wheelchair equipment manufacturing, specifically be a wheelchair cat ladder mechanism and wheelchair.

Background

The wheelchair is mainly used as an important moving tool for home rehabilitation, turnover transportation, diagnosis and outgoing activities of wounded persons, sick persons and disabled persons, not only can the wheelchair meet the needs of physically disabled persons and mobility-handicapped persons, but also is more important for the family members to move and take care of the sick persons, so that the sick persons can do physical exercises and participate in social activities by means of the wheelchair. The common wheelchair generally comprises front and rear wheels, a pedal, left and right armrests, a seat, a backrest and the like. However, the traditional wheelchair can only walk on a gentle road but cannot go up and down steps, only patients need to detour or change destinations, and the independent travel of the patients is not facilitated; the traditional wheelchair has the defects that the wheelchair or patients need to be moved up and down along the steps, time and labor are wasted, and great troubles are brought to caregivers. Therefore, the current demand can be met only by designing a wheelchair which can walk on flat ground and climb stairs.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the shortcoming of prior art, adopt the mode of backup pad cooperation track and auxiliary wheel, designed a can enough walk on the level land can the wheelchair cat ladder mechanism of cat ladder and contain the wheelchair of this wheelchair cat ladder mechanism again, solved present wheelchair can only go on the level land and can not the problem of cat ladder.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a wheelchair cat ladder mechanism, includes the backup pad, be equipped with decurrent bracing piece between the both ends around the backup pad, keep away from on the bracing piece the one end of backup pad is radially rotated and is equipped with the pivot, the pivot perpendicular to keep away from on the backup pad left side wall, the left and right sides of backup pad front end respectively is equipped with a decurrent first telescopic link, the both ends of pivot respectively rotate and are equipped with a track frame, every the front end of track frame correspond with one keep away from on the first telescopic link the one end of backup pad is rotated and is connected, two all be equipped with the track through the guide pulley group in the one side of keeping away from mutually between the track frame, the axis of all guide pulleys in the guide pulley group is on a parallel with the axis of pivot, the rear end of backup pad is equipped with the auxiliary wheel through telescopic machanism, the auxiliary wheel is located two between the track frame, two the common fixedly connected with connecting rod of anterior segment of the one side of track frame, be equipped with crawler drive arrangement on the track frame in opposite directions, the projected edge that the track is on the plane of the left side wall of backup pad surrounds the track is on the plane of left side wall be on a parallel to the track frame be parallel to the edge of projection on the plane of the left side wall of backup pad.

Preferably, telescopic machanism locates including rotating connecting rod in the backup pad, rotate and locate change epaxial second telescopic link, keep away from on the connecting rod the one end of backup pad sets up the auxiliary wheel, the second telescopic link is kept away from the one end of pivot is rotated and is connected between the both ends of connecting rod, the second telescopic link is kept away from the one end orientation of pivot the back upper side of track frame, the length of connecting rod is greater than the lower surface of track arrives the distance of backup pad.

Preferably, the auxiliary wheel includes the wheel that two diameters equal, keep away from on the connecting rod the one end of backup pad is equipped with the through-hole, the axis of through-hole is on a parallel with the axis of pivot, through the bearing between the both ends of connecting axle with the through-hole is connected, each fixedly connected with one in both ends of connecting axle the wheel, the axis of connecting axle with the axis collineation of wheel.

Preferably, the guide wheel set includes a first guide wheel, a second guide wheel and a third guide wheel, the diameters of the second guide wheel and the third guide wheel are smaller than the diameter of the first guide wheel, the first guide wheel is arranged at the front end of the track frame, the third guide wheel is arranged at the rear end of the track frame, the second guide wheel is arranged between the front end and the rear end of the track frame, the second guide wheel is relatively located below the third guide wheel, the track is sleeved on the whole body formed by the first guide wheel, the second guide wheel and the third guide wheel, the inner surface of the track is abutted to the circumferential surfaces of the first guide wheel, the second guide wheel and the third guide wheel, and the upper surface and the lower surface of the track are parallel.

Preferably, the first guide wheels on the two track frames share one wheel shaft, the wheel shaft shared by the two first guide wheels penetrates through the two track frames, the track driving device is a speed reducing motor, the speed reducing motor is arranged on one track frame, and an output shaft of the speed reducing motor is connected with the wheel shaft in the track frame through a belt in a transmission manner.

The wheelchair comprises a seat and the wheelchair ladder climbing mechanism, wherein idler wheels are rotatably arranged on the left side wall and the right side wall of the seat, the lower edges of the idler wheels are located below the seat, the idler wheels are located on one side, facing the front end of a supporting plate, of a rotating shaft, the lower surface of the seat is fixedly connected with the upper surface of the supporting plate, the wheelchair ladder climbing mechanism is located between the idler wheels on the left side and the right side of the seat, the farthest position of the idler wheels relative to the seat is located between the lower surfaces of the supporting plate, and the distance between the lower surfaces of the caterpillar bands is larger than the distance between the lower surfaces of the supporting plate.

Preferably, the control switch of the first telescopic rod, the control switch of the second telescopic rod and the control switch of the crawler driving device are all mounted on the armrest of the seat.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a mode of backup pad cooperation track and auxiliary wheel has designed a wheelchair cat ladder mechanism that can enough walk on the level land and can the cat ladder and has contained this wheelchair cat ladder mechanism's wheelchair, has solved present wheelchair and can only go on the level land and can not the problem of cat ladder.

2. The utility model discloses an extension and the withdrawal of second telescopic link can control the auxiliary wheel and leave ground and with two states of ground contact, it is more convenient.

3. The utility model discloses a setting of two wheels for the auxiliary wheel is more stable at the in-process that supports the wheelchair, is difficult to make the wheelchair about empty.

Drawings

FIG. 1 is a schematic view of a wheelchair according to the present invention;

FIG. 2 is a schematic structural view of a wheelchair ladder climbing mechanism of the present invention;

FIG. 3 is a view of the track frame partially cut away in FIG. 2 to show the connection relationship between the reduction motor and the wheel axle;

FIG. 4 is a view showing a state of the wheelchair of the present invention traveling on a flat ground;

FIG. 5 is a state diagram of the wheelchair of the present invention about to climb a ladder;

FIG. 6 is a state diagram of the wheelchair of the present invention during climbing a ladder;

fig. 7 is a state diagram of the wheelchair of the present invention just after climbing the stairs.

Wherein, 1, a support plate; 2. a support bar; 3. a rotating shaft; 4. a first telescopic rod; 5. a track frame; 6. a connecting rod; 7. a crawler belt; 8. a connecting rod; 9. a second telescopic rod; 10. a wheel; 11. A connecting shaft; 12. a first guide wheel; 13. a second guide wheel; 14. a third guide wheel; 15. an axle; 16. a reduction motor; 17. a belt; 18. rollers, 19, handrails; 20. a chair seat.

Detailed Description

Referring to fig. 1-7, a wheelchair ladder climbing mechanism includes a support plate 1, a downward support rod 2 is disposed between a front end and a rear end of the support plate 1, a rotation shaft 3 is radially rotatably disposed at one end of the support rod 2, which is far away from the support plate 1, the rotation shaft 3 is perpendicular to a left side wall of the support plate 1, a downward first telescopic rod 4 is disposed on each of left and right sides of a front end of the support plate 1, a track frame 5 is rotatably disposed at each of two ends of the rotation shaft 3, a front end of each track frame 5 is rotatably connected to one end of each first telescopic rod 4, which is far away from the support plate 1, a track 7 is disposed on a surface of each track frame 5, which is opposite to the surface, through a guide wheel set, axes of all guide wheels in the guide wheel set are parallel to an axis of the rotation shaft 3, a rear end of the support plate 1 is disposed with an auxiliary wheel through a telescopic mechanism, the auxiliary wheel is disposed between the two track frames 5, a front section of the surface of each track frame 5, which is opposite to the surface, a connecting rod 6 is fixedly connected to the track frame 5, a track driving device is disposed on the track frame 5, an edge of a plane, which is parallel to a projection of a left side wall of the support plate 1, which is parallel to a projection of the left side wall of the support plate 1.

In the embodiment, a rotating shaft 3 which is radially and rotatably arranged at one end of the support rod 2 far away from the support plate 1 is used for connecting a crawler frame 5, so that the crawler frame 5 can be driven to rotate around the rotating shaft 3 to adapt to a ladder stand in the extending state of the first telescopic rod 4; the connecting rod 6 is arranged to enable the two crawler frames 5 to be integrated, and can uniformly control the two crawler frames 5 to synchronously rotate around the rotating shaft 3; the projected edge of the crawler belt 7 on the plane parallel to the left side wall of the support plate 1 surrounds the projected edge of the crawler belt frame 5 on the plane parallel to the left side wall of the support plate 1, that is, when walking on a flat road, the crawler belt 7 contacts the ground and the crawler belt frame 5 is suspended; when the chair seat 20 is installed on the wheelchair ladder climbing mechanism to form a wheelchair, at the first moment of the wheelchair ladder climbing, the crawler belt 7 firstly contacts the edge of the ladder (as shown in fig. 5), at the moment, the auxiliary wheel is slowly packed up through the telescopic mechanism, and meanwhile, the first telescopic rod 4 is slowly extended, so that in the wheelchair ladder climbing process, only the crawler belt contacts the edge of the ladder (as shown in fig. 6) on the wheelchair, when the ladder climbing is just completed, the auxiliary wheel is slowly released through the telescopic mechanism, so that the auxiliary wheel contacts the ground, then the crawler belt frame 5 is slowly contracted through the first telescopic rod 4, the state that the wheelchair travels on a flat road is restored to the crawler belt frame 5 (as shown in fig. 7), and therefore the problem that the wheelchair can travel on the flat road and can climb the ladder is solved.

As a preferred mode, telescopic machanism locates including rotating connecting rod 8 in the backup pad 1, rotate and locate second telescopic link 9 in the pivot 3, keep away from on the connecting rod 8 the one end setting of backup pad 1 the auxiliary wheel, second telescopic link 9 is kept away from the one end of pivot 3 is rotated and is connected between the both ends of connecting rod 8, second telescopic link 9 is kept away from the one end orientation of pivot 3 the back upper side of track frame 5, the length of connecting rod 8 is greater than the lower surface of track 7 arrives the distance of backup pad 1, through the extension and the withdrawal of second telescopic link 9, can control the auxiliary wheel and leave ground and with two states of ground contact, it is more convenient. Wherein, first telescopic link 4 and second telescopic link 9 adopt pneumatic telescopic link and hydraulic telescopic link all can.

As a preferable mode, the auxiliary wheel comprises two wheels 10 with the same diameter, a through hole is formed in one end, far away from the supporting plate 1, of the connecting rod 8, the axis of the through hole is parallel to the axis of the rotating shaft 3, two ends of the connecting shaft 11 are connected with the through hole through bearings, one wheel 10 is fixedly connected to each of two ends of the connecting shaft 11, and the axis of the connecting shaft 11 is collinear with the axis of the wheel 10. Through the arrangement of the two wheels 10, the auxiliary wheels are more stable in the process of supporting the wheelchair, and the wheelchair is not easy to topple left and right.

Preferably, the guide wheel set includes a first guide wheel 12, a second guide wheel 13, and a third guide wheel 14, diameters of the second guide wheel 13 and the third guide wheel 14 are smaller than a diameter of the first guide wheel 12, the first guide wheel 12 is disposed at a front end of the track frame 5, the third guide wheel 14 is disposed at a rear end of the track frame 5, the second guide wheel 13 is disposed between front and rear ends of the track frame 5, the second guide wheel 13 is located below the third guide wheel 14, the track 7 is disposed on the whole of the first guide wheel 12, the second guide wheel 13, and the third guide wheel 14, inner surfaces of the track 7 are abutted to circumferential surfaces of the first guide wheel 12, the second guide wheel 13, and the third guide wheel 14, and an upper surface and a lower surface of the track 7 are parallel. After the arrangement, the rear end of the crawler belt 7 connected with the second guide wheel 13 and the third guide wheel 14 together is provided with an inclined surface, so that the crawler belt can conveniently walk towards the ladder in the ladder climbing process.

Preferably, the first guide wheels 12 of the two track frames 5 share a common axle, the axle shared by the two first guide wheels 12 penetrates through the two track frames 5, the track driving device is a speed reducing motor 16, the speed reducing motor 16 is arranged on one track frame 5, and an output shaft of the speed reducing motor 16 is in transmission connection with the axle in the track frame 5 through a belt 17. This arrangement enables the movement of the entire track 7 to be controlled by one reduction motor 16.

A wheelchair comprises a seat 20 and the wheelchair ladder climbing mechanism, wherein rollers 18 are rotatably arranged on the left side wall and the right side wall of the seat 20, the lower edges of the rollers 18 are positioned below the seat 20 (namely the rollers 18 are used for supporting the seat 20), the rollers 18 are positioned on one side of the rotating shaft 3 facing the front end of the supporting plate 1, the lower surface of the seat 20 is fixedly connected with the upper surface of the supporting plate 1, the wheelchair ladder climbing mechanism is positioned between the rollers 18 on the left side and the rollers 18 on the right side of the seat 20, and the distance from the farthest part of the circumferential surface of the rollers 18 relative to the seat 20 (also the contact part of the rollers 18 and the ground when the wheelchair travels on a flat road) to the lower surface of the supporting plate 1 is larger than the distance from the lower surface of a crawler belt 7 to the lower surface of the supporting plate 1, so that the crawler belt 7 does not contact with the ground when the wheelchair travels on a normal flat road.

In a preferred embodiment, the control switch of the first telescopic rod 4, the control switch of the second telescopic rod 9, and the control switch of the crawler belt driving device are all mounted on the armrest 19 of the seat 20. The arrangement is convenient for a user to operate and control the control switch of the first telescopic rod 4 and the second telescopic rod 9.

Claims

1. A wheelchair ladder climbing mechanism is characterized by comprising a supporting plate (1), wherein a downward supporting rod (2) is arranged between the front end and the rear end of the supporting plate (1), a rotating shaft (3) is radially and rotatably arranged at one end of the supporting rod (2) far away from the supporting plate (1), the rotating shaft (3) is vertical to the left side wall of the supporting plate (1), the left side and the right side of the front end of the supporting plate (1) are respectively provided with a downward first telescopic rod (4), two ends of the rotating shaft (3) are respectively provided with a crawler frame (5) in a rotating way, the front end of each crawler frame (5) is correspondingly and rotatably connected with one end of the first telescopic rod (4) far away from the supporting plate (1), one surface of the crawler frame (5) which is back to back is provided with a crawler (7) through a guide wheel set, the axes of all guide wheels in the guide wheel set are parallel to the axis of the rotating shaft (3), the rear end of the supporting plate (1) is provided with an auxiliary wheel through a telescopic mechanism, the auxiliary wheel is positioned between the two crawler frames (5), the front sections of the opposite surfaces of the two crawler frames (5) are fixedly connected with a connecting rod (6) together, the crawler belt driving device is arranged on the crawler belt frame (5), and the edge of the projection of the crawler belt (7) on the plane parallel to the left side wall of the supporting plate (1) surrounds the edge of the projection of the crawler belt frame (5) on the plane parallel to the left side wall of the supporting plate (1).

2. A wheelchair ladder climbing mechanism according to claim 1, characterized in that the telescoping mechanism comprises a connecting rod (8) rotatably arranged at the rear end of the supporting plate (1), and a second telescopic rod (9) rotatably arranged on the rotating shaft (3), the auxiliary wheel is arranged at the end of the connecting rod (8) far away from the supporting plate (1), the end of the second telescopic rod (9) far away from the rotating shaft (3) is rotatably connected between the two ends of the connecting rod (8), the end of the second telescopic rod (9) far away from the rotating shaft (3) faces the rear upper part of the crawler frame (5), and the length of the connecting rod (8) is greater than the distance from the lower surface of the crawler (7) to the supporting plate (1).

3. A wheelchair ladder climbing mechanism according to claim 2, characterised in that the auxiliary wheel comprises two wheels (10) of equal diameter, that a through hole is provided in the connecting rod (8) at the end remote from the support plate (1), the axis of the through hole is parallel to the axis of the rotating shaft (3), that the two ends of the connecting shaft (11) are connected to the through hole through bearings, that one wheel (10) is fixedly connected to each end of the connecting shaft (11), and that the axis of the connecting shaft (11) is collinear with the axis of the wheel (10).

4. A wheelchair ladder climbing mechanism according to claim 1, wherein the guide wheel set comprises a first guide wheel (12), a second guide wheel (13) and a third guide wheel (14), the diameters of the second guide wheel (13) and the third guide wheel (14) are smaller than the diameter of the first guide wheel (12), the first guide wheel (12) is arranged at the front end of the track frame (5), the third guide wheel (14) is arranged at the rear end of the track frame (5), the second guide wheel (13) is arranged between the front end and the rear end of the track frame (5), the second guide wheel (13) is arranged below the third guide wheel (14), the track (7) is sleeved on the whole body formed by the first guide wheel (12), the second guide wheel (13) and the third guide wheel (14), the inner surface of the track (7) is abutted to the circumferential surface of the first guide wheel (12), the second guide wheel (13) and the third guide wheel (14), and the upper surface of the track guide wheel (7) is parallel to the lower surface.

5. A wheelchair ladder climbing mechanism according to claim 4, characterized in that the first guide wheels (12) of the two track frames (5) share one axle (15), the axle (15) shared by the two first guide wheels (12) extends through the two track frames (5), the track driving device is a speed reducing motor (16), the speed reducing motor (16) is arranged on one track frame (5), and the output shaft of the speed reducing motor (16) is in transmission connection with the axle (15) in the track frame (5) through a belt (17).

6. A wheelchair, characterized by comprising a seat (20) and the wheelchair ladder climbing mechanism of claim 4, wherein rollers (18) are rotatably arranged on the left and right side walls of the seat (20), the lower edges of the rollers (18) are positioned below the seat (20), the rollers (18) are positioned on one side of the rotating shaft (3) facing the front end of the support plate (1), the lower surface of the seat (20) is fixedly connected with the upper surface of the support plate (1), the wheelchair ladder climbing mechanism is positioned between the rollers (18) on the left side and the rollers (18) on the right side of the seat (20), and the distance from the farthest position of the rollers (18) relative to the seat (20) to the lower surface of the support plate (1) is greater than the distance from the lower surface of the crawler belt (7) to the lower surface of the support plate (1).

7. Wheelchair according to claim 6, characterised in that the control switch of the first telescopic rod (4), the control switch of the second telescopic rod (9) and the control switch of the crawler drive are mounted on the armrest (19) of the seat (20).