CN110101513A - A kind of link-type stair-climbing wheel chair - Google Patents

Abstract

The invention discloses a connecting rod type stair climbing wheelchair, which belongs to the field of household wheelchairs. It includes a wheelchair seat, a front wheel drive module installed on the bottom of the wheelchair seat and a rear wheel set, and a front wheel set installed on the front wheel drive module; the front wheel drive module includes a screw, a linear guide rail, and a nut slider And the motor, the front wheel set includes connecting rod C, connecting rod D, friction plate, roller, connecting rod A, connecting rod B, connecting rod C and connecting rod D are in the same plane, and the angle between connecting rod C and connecting rod D When the angle is greater than 90 degrees, the front wheel set is combined with the screw rod and the connecting rod mechanism to realize the alternating climbing action of the friction plate and the roller in the front wheel set; the outer circumference of the rear wheel A is evenly equipped with four wheels that can rotate freely. The rollers can be driven by the front wheel set to realize the climbing action. The invention is a connecting rod stair-climbing wheelchair with simple and reasonable structure, a connecting rod synchronously driving the front wheels to ascend and descend interactively for walking and climbing steps, and the rear wheels for passively rolling and climbing the steps.

Description

A link type stair climbing wheelchair

technical field

The invention relates to a connecting rod type wheelchair for climbing stairs, which belongs to the technical field of household wheelchairs.

Background technique

The existing wheelchairs used by the elderly all need to be manually pushed to climb stairs, and the relative heights of the front wheels and rear wheels of the wheelchair need to be constantly changed, thereby increasing the workload and reducing the stability of climbing stairs. In order to imitate people's stair-climbing action and realize walking and climbing stairs, it is necessary to design a wheelchair with higher stability for climbing stairs.

Contents of the invention

The technical problem to be solved by the present invention is to provide a connecting rod stair climbing wheelchair with a simple and reasonable structure, a connecting rod synchronously driving the front wheel to lift, interactively stroll and climb steps, and the rear wheel passively rolling to climb steps.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A connecting rod type stair climbing wheelchair, comprising a wheelchair seat, a front wheel drive module and a rear wheel wheel set installed at the bottom of the wheelchair seat, and a front wheel wheel set installed on the front wheel drive module,

The front wheel drive module includes a lead screw and a linear guide rail parallel to each other installed on the wheelchair base, and a nut slide block that is engaged with the lead screw and can slide linearly along the linear guide rail, and its output shaft is connected to the linear guide rail. The motor connected to the right end of the screw rod; the two ends of the screw rod pass through two rolling bearings and are installed on the bracket A and the bracket B;

The front wheel set includes a connecting rod C and a connecting rod D that are hingedly installed at the bottom of the wheelchair seat, and a friction plate with sufficient friction at the other end of the connecting rod C that is hingedly installed, and is hingedly installed at the bottom of the wheelchair seat. The other end of the connecting rod D is a roller that can rotate freely, and also includes a connecting rod A and a connecting rod B; one end of the connecting rod A is hinged on the nut slider, and the other end is hinged on the slider A. The slider A can slide along the connecting rod C; one end of the connecting rod B is hinged on the nut slider, and the other end is hinged on the slider B, and the slider B can slide along the connecting rod D Sliding; said connecting rod A, connecting rod B, connecting rod C and connecting rod D are coplanar;

The rear wheel set includes two sets of rear wheels A and B that are identical in structure and installed parallel to each other. The rear wheels A and B are installed at both ends of the rear axle in parallel and can be wound The axis of the rear wheel shaft rotates; the rear wheel A frame is fixedly installed on the wheelchair seat, and the other end of the rear wheel A is hingedly installed, and the outer circumference of the rear wheel A is evenly equipped with a plurality of A sub-roller that can rotate freely; the installation method of the rear wheel B is the same as that of the rear wheel A.

Further, the included angle between the connecting rod C and the connecting rod D is greater than 90 degrees.

Further, only one set of the front wheel set is centrally installed on the wheelchair base.

Further, the friction plate is made of non-metallic material.

Further, the rear wheel A is provided with four sub-rollers distributed in a cross shape.

Further, the level difference between adjacent sub-rollers is the same as the step height difference.

The beneficial effects achieved by the present invention: a connecting rod type stair climbing wheelchair of the present invention is provided with a nut slider for synchronously driving the friction plate and the rollers to rotate in the opposite direction or in the same direction, which not only realizes walking in the front wheel lifting and exchanging mode Climb the steps, and use the friction of the ground to drive the rear wheel to roll and climb the steps; in addition, due to the use of the connecting rod structure, the relative height between the friction plate and the rollers and the ground can be changed, so that it is suitable for rolling on the ground and walking on steps. Switch freely.

Description of drawings

Fig. 1 is a schematic diagram of the main view structure principle of a connecting rod type stair climbing wheelchair of the present invention;

Fig. 2 is a schematic view of the upward structure of a connecting rod type stair climbing wheelchair according to the present invention.

In the figure, 1—wheelchair seat; 10—lower step; 11—higher step; 12—higher step; 21—leading screw; 22—nut slider; 23—bracket A; 24—bracket B; 25—motor ;26—linear guide rail; 31—connecting rod A; 32—connecting rod B; 33—friction plate; 34—roller; 35—connecting rod C; 36—connecting rod D; 37—slider A; ; 4—rear wheel A; 41—sub roller; 42—rear wheel A frame; 5—rear wheel B; 6—rear axle.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

Referring to Fig. 1 and Fig. 2, a connecting rod type stair climbing wheelchair of the present invention includes a wheelchair seat 1, a front wheel drive module and a rear wheel wheel set installed at the bottom of the wheelchair seat 1, and a front wheel drive module installed at the bottom of the wheelchair seat 1. Front wheel set on the module.

Referring to Fig. 1 and Fig. 2, the front-wheel drive module includes a lead screw 21 and a linear guide rail 26 installed on the wheelchair base 1 which are parallel to each other, and a nut slide block which is engaged with the lead screw 21 and can slide linearly along the linear guide rail 26. 22, the motor 25 whose output shaft links to each other with the right end of the screw mandrel 21; the two ends of the screw mandrel 21 pass through two rolling bearings respectively and are installed on the support A23, the support B24.

Referring to Fig. 1 and Fig. 2, the front wheel set includes a connecting rod C35 and a connecting rod D36 which are hingedly installed at the bottom of the wheelchair seat 1, and are hingedly installed at the other end of the connecting rod C35 and are made of non-metallic materials with sufficient friction. Friction plate 33, sufficient friction here means that when friction plate 33 touches a higher step, its friction can keep it from sliding, such as synthetic rubber, plastics and other materials, which can be hinged at the other end of connecting rod D36 The freely rotating roller 34 also includes connecting rod A31 and connecting rod B32 in addition; one end of A31 is hinged on the nut slider 22, and its other end is hinged on the slider A37, and the slider A37 can slide along the connecting rod C35; the connecting rod One end of B32 is hinged on the nut slider 22, and its other end is hinged on the slider B38, and the slider B38 can slide along the connecting rod D36; connecting rod A31, connecting rod B32, connecting rod C35 and connecting rod D36 are coplanar, and The included angle between the connecting rod C35 and the connecting rod D36 is greater than 90 degrees, and the front wheel set is only set in the center to facilitate the wheelchair to turn and move in the stairwell.

Referring to Fig. 1 and Fig. 2, the rear wheel set includes two sets of rear wheels A4 and B5 which are identical in structure and installed parallel to each other, and the rear wheels A4 and B5 are installed in parallel at both ends of the rear axle 6 , and can rotate around the axis of the rear wheel shaft 6; the rear wheel A frame 42 is fixedly installed on the wheelchair seat 1, and its other end is hingedly equipped with the rear wheel A4, and the outer circumference of the rear wheel A4 is evenly equipped with four Freely rotating sub-roller 41; the installation method of rear wheel B5 is identical with the installation method of rear wheel A4.

Working principle: Assume that the roller 34 of the wheelchair seat is located on the higher step 11, and the rear wheel A4 and rear wheel B5 are located on the lower step 10. At this time, the rotation of the motor 25 drives the screw 21 to rotate, and then drives the nut slider 22 to move forward , the connecting rod A31 drives the connecting rod C35 through the slider A37 to drive the friction plate 33 to rotate forward, so that the friction plate 33 diffuses to a higher step 12, and at the same time, the connecting rod B32 drives the connecting rod D36 through the slider B38 to drive the roller 34 backward Rotate, thereby make friction plate 33 contact higher step 12, and roller 34 break away from higher step 11; On the high step 12, under the action of friction, the linkage mechanism drives the wheelchair to move forward. After the roller 34 breaks away from the higher step 11, it enters a higher step. In the rear wheel group, one of the sub-rollers 41 is just in contact with the higher step. Step 11, the rear wheel A4 and the rear wheel B5 can rotate around the axis of the rear wheel shaft 6, and under the rotation of the connecting rod C35, the rear wheel A4 and the rear wheel B5 can climb up the higher step 11 in a rolling manner. climb stairs.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. It should also be regarded as the protection scope of the present invention.

Claims (6)

1. a kind of link-type stair-climbing wheel chair, including wheelchair car (1) are installed in the front-wheel drive of wheelchair car (1) bottom Module and rear wheel rotation group, the front-wheel wheel group being installed in the front-wheel drive module, it is characterised in that:

The front-wheel drive module includes the lead screw (21) being parallel to each other being installed on wheel seat base (1) and linear guide (26), it can be exported along the nut slider (22) of the linear guide (26) linear slide with the lead screw (21) engaged transmission The motor (25) that axis is connected with the screw rod (21) right end；The both ends of the screw rod (21) are each passed through two rolling bearing installings In on bracket A (23), bracket B (24)；

The front-wheel wheel group includes the connecting rod C (35) and connecting rod D (36) for being hingedly installed in wheelchair car (1) bottom, hingedly The friction plates (33) that connecting rod C (35) other end has enough frictional force are installed in, the connecting rod D (36) is hingedly installed in Other end idler wheel free to rotate (34) additionally includes connecting rod A (31) and connecting rod B (32)；One end of the connecting rod A (31) It is articulated on the nut slider (22), the other end is articulated on sliding block A (37), and the sliding block A (37) can be along the connecting rod C (35) it slides；One end of the connecting rod B (32) is articulated on the nut slider (22), and the other end is articulated with slide block B (38) On, the slide block B (38) can be slided along the connecting rod D (36)；The connecting rod A (31), connecting rod B (32), connecting rod C (35) and connecting rod D (36) is coplanar；

The rear wheel rotation group includes identical two groups of structures, rear-wheel A (4) of the installing that is parallel to each other and rear-wheel B (5), after described A (4) and rear-wheel B (5) installed parallel are taken turns in the both ends of hind axle (6), and can be rotated around the axis of the hind axle (6)； Rear-wheel A frame (42) is fixed on the wheelchair car (1), and the other end is hingedly installed with the rear-wheel A (4), after described It takes turns and is uniformly installed with multiple sub- idler wheels (41) that can be freely rotated on the periphery of A (4)；The installing mode of the rear-wheel B (5) with The mounting means of the rear-wheel A (4) is identical.

2. a kind of link-type stair-climbing wheel chair as described in claim 1, characterized in that the connecting rod C (35) and connecting rod D's (36) Angle is greater than 90 degree.

3. a kind of link-type stair-climbing wheel chair as described in claim 1, characterized in that be centrally mounted at the wheel including only one group The front-wheel wheel group on seat base (1).

4. a kind of link-type stair-climbing wheel chair as described in claim 1, characterized in that the friction plates (33) are using nonmetallic Material is made.

5. a kind of link-type stair-climbing wheel chair as described in claim 1, characterized in that in ten there are four being set on the rear-wheel A (4) The sub- idler wheel (41) of font distribution.

6. a kind of link-type stair-climbing wheel chair as claimed in claim 5, characterized in that the adjacent sub- idler wheel (41) is horizontal high Degree difference is identical as step height difference.