CN209203802U - Multi-functional wheelchair based on multinomial drive - Google Patents

Abstract

The utility model relates to the technical field of wheelchairs, in particular to a multifunctional wheelchair based on multiple drives, including a wheelchair frame, on which a backrest and a seat cushion are installed, and an incomplete gear massage mechanism is arranged on the backrest. The bottom of the seat cushion is provided with a screw transmission link mechanism, one end of the screw transmission link mechanism is connected with the wheelchair frame, and the other end is connected with the seat cushion, and the screw transmission link mechanism is used to drive the rotation of the seat cushion; the lower end of the wheelchair frame An outstretched stair climbing mechanism is provided for climbing stairs, and the incomplete gear massage mechanism includes a first servo motor fixed on the back of the wheelchair. The multifunctional wheelchair of the utility model can realize the massage of the user's back, can realize the raising of the seat cushion, and is convenient to use.

Description

A multifunctional wheelchair based on multi-drive

technical field

The utility model relates to the technical field of wheelchairs, in particular to a multifunctional wheelchair based on multiple drives.

Background technique

my country has gradually stepped into an aging society, and the attention and exclusive needs of the elderly will increase. However, there is currently no functional furniture specially produced for the elderly on the market. In recent years, my country's wheelchair industry has developed rapidly, but the product structure is single and the functionality is poor. Most of them are ordinary wheelchairs with low prices. However, the demand for wheelchairs in the high-end product market is gradually increasing, and there is still no specialization for the physical characteristics of the elderly. Wheelchair products. At present, commercially available wheelchairs are divided into two types: manual and electric. The former uses hand or manpower to achieve movement, which is inconvenient for the elderly, but has a solid structure, easy maintenance, and low price; the latter is driven by a motor, which saves labor and has higher autonomy, but is more expensive. Stair-climbing wheelchairs in the existing market all adopt crawler devices, which are simple in structure and safe to use, but the price is too expensive to be applicable to general families, and wheelchairs with devices for helping the elderly to get up or back massage devices are very expensive. hard to find.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides a multifunctional wheelchair based on multiple drives, which solves the shortcomings of the existing wheelchairs that realize the function of climbing stairs, which are expensive and do not have a back massage function and a stand-up device.

The utility model adopts the following technical solutions: a multifunctional wheelchair based on multiple drives, including a wheelchair frame, a backrest and a seat cushion are installed on the wheelchair frame, an incomplete gear massage mechanism is arranged on the backrest, and the seat cushion There is a screw transmission link mechanism under the bottom, one end of the screw transmission link mechanism is connected with the wheelchair frame, and the other end is connected with the seat cushion, and the screw transmission link mechanism is used to drive the rotation of the seat cushion; the lower end of the wheelchair frame is provided with The outstretched stair climbing mechanism is used for climbing stairs.

Further, the incomplete gear massage mechanism includes a first servo motor fixed on the back of the wheelchair, the output shaft of the first servo motor is fixedly connected to the incomplete gear, and the outer side of the incomplete gear is covered with a rack frame, The incomplete gear meshes with the racks on the left and right sides of the rack frame successively to realize the up and down reciprocating movement of the rack frame relative to the backrest, and the massage wheel is fixed on the front end of the rack frame.

Further, the screw transmission link mechanism includes a screw, a nut and a second servo motor, the second servo motor is fixedly installed on the wheelchair frame under the seat cushion, the output shaft of the second servo motor is fixedly connected to the screw, and the screw With nut.

Further, the screw transmission link mechanism also includes a pair of first connecting rods, a pair of second connecting rods, a pair of third connecting rods, a large arc guide rail, a small arc guide rail, and a large arc guide rail and a small arc guide rail. The guide rails are all fixed on the wheelchair frame below the backrest. The wheelchair frame is provided with horizontal guide rails. The large arc guide rails and the small arc guide rails are respectively symmetrical about the horizontal guide rails. The second hinge of the two connecting rods and the third hinge of the two third connecting rods are respectively located on the horizontal guide rails, the two first connecting rods are respectively hinged with the second connecting rods, and the two second connecting rods are respectively connected with the third connecting rods. Hinged, the fourth hinge and the fifth hinge formed by the first connecting rod and the second connecting rod are located in the large arc guide rail, the sixth hinge and the seventh hinge formed by the second connecting rod and the third connecting rod are located in the small arc guide rail middle.

Further, the first connecting rod located above the horizontal guide rail and the second connecting rod far away from the backrest are respectively rotatably connected to the side panels on both sides of the seat cushion, and the top of a second connecting rod close to the backrest is rotatably connected to the connecting rod, and the connecting rod Fixedly connected with the pinion, the pinion is hinged on the side plate, the third connecting rod above the guide rail is hinged with the short bar, the short bar is hinged with the side plate, and the nut is fixedly connected with the first hinge.

Further, the backrest gear mechanism includes a pinion 1, a pinion 2 and a large gear. The side plate on one side of the seat cushion is rotatably mounted with a pinion 2, and the pinion 2 meshes with the pinion 1.

Further, the backrest and the seat cushion are rotatably connected through a rotating shaft, and a large gear is arranged on the rotating shaft, and the large gear is fixedly connected with the backrest, and the large gear meshes with the small gear.

Further, the outstretched stair climbing mechanism includes forward outriggers fixed at the front side of the wheelchair frame, and stair climbing wheels are installed on the forward outriggers, and front wheels and rear wheels are also arranged under the wheelchair frame. wheel.

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

The structure of the wheelchair device in this technical scheme is simple and reasonable. The first servo motor drives the incomplete gear to mesh with the rack to drive the massage wheel to reciprocate to realize the massage function. Floor; the second servo motor is used to drive the screw transmission device to change the rotary motion into a linear motion so as to push multiple connecting rods up and down to realize the automatic rise and fall of the seat. Therefore can realize the getting up of the old man conveniently, be convenient to the position transfer of parts such as wheelchair and sofa and bed;

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute improper limitations to the present application.

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is a schematic diagram of the connection relationship between the incomplete gear and the rack frame in the utility model;

Fig. 3 is a structural schematic diagram of the backrest and the incomplete gear massage mechanism in the utility model;

Fig. 4 is a structural schematic diagram of the screw drive linkage mechanism in the utility model;

Fig. 5 is the schematic diagram of part structure such as backrest gear mechanism in the utility model;

Fig. 6 is a structural schematic diagram of an overhanging stair climbing mechanism in the present invention.

In the figure: 1, wheelchair frame; 2, incomplete gear massage mechanism; 201, incomplete gear; 202, rack; 203, massage wheel; 204, backrest; 3, screw transmission linkage mechanism; 301, fourth hinge; 302, the first hinge; 303, the horizontal guide rail; 304, the large arc guide rail; 305, the fifth hinge; 305A, the first connecting rod; 305B, the second connecting rod; 305C, the third connecting rod; 306, the sixth hinge ; 306A, the second hinge; 307, small arc guide rail; 308, the third hinge; 309, the seventh hinge; 4, backrest gear mechanism; 401, large gear; 402, pinion two; 403, pinion one; 5 , outstretched stair-climbing mechanism; 501, rear wheel; 502, stair-climbing wheel; 503, front-wheel.

Detailed ways

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application.

As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

In a typical implementation of the present utility model, as shown in Figures 1-6, a multifunctional wheelchair based on multiple drives includes a wheelchair frame 1 on which a backrest and a cushion are installed, and the backrest An incomplete gear massage mechanism 2 is provided on the top, and a screw transmission linkage mechanism 3 is provided below the seat cushion. One end of the spiral transmission linkage mechanism 3 is connected with the wheelchair frame 1, and the other end is connected with the seat cushion. The mechanism is used to drive the rotation of the seat cushion; the lower end of the wheelchair frame 1 is provided with an outreaching stair climbing mechanism 5, and the outreaching stair climbing mechanism is used for climbing stairs.

Preferably, the incomplete gear 201 massage mechanism 2 includes a first servo motor fixed on the wheelchair backrest through a bracket, the output shaft of the first servo motor is fixedly connected with the incomplete gear 201, and the incomplete gear 201 The outer side is covered with a rack 202 frame, and the incomplete gear 201 meshes with the racks 202 on the left and right sides of the rack 202 frame in turn to realize the up and down reciprocating movement of the rack 202 frame relative to the backrest. The massage wheel 203 is fixed on the gear rack 203 by screws. bar 202 at the front end of the frame.

Preferably, the screw transmission link mechanism includes a screw (not shown in the figure), a nut (not shown in the figure) and a second servo motor (not shown in the figure), and the second servo motor is fixedly installed on On the wheelchair frame 1 on the underside of the seat cushion, the output shaft of the second servo motor is fixedly connected with the screw rod, and the screw rod is provided with a nut.

Preferably, the screw transmission link mechanism also includes a pair of first connecting rods 305A, a pair of second connecting rods 305B, a pair of third connecting rods 305C, a large arc guide rail 304, a small arc guide rail 307, and a large circular arc guide rail 307. Both the arc guide rail 304 and the small arc guide rail 307 are fixed on the wheelchair frame 1 below the backrest, the wheelchair frame 1 is provided with a horizontal guide rail 303, and the large arc guide rail 304 and the small arc guide rail 307 are respectively symmetrical about the horizontal guide rail 303, The first hinges of the two first connecting rods, the second hinges of the two second connecting rods and the third hinges of the two third connecting rods are located on the horizontal guide rail 303 respectively, and the two first connecting rods are connected with the second connecting rods respectively. The rods are hinged, the two second connecting rods are respectively hinged with the third connecting rod, the fourth hinge and the fifth hinge formed by the first connecting rod and the second connecting rod are located in the large arc guide rail 304, the second connecting rod and the third connecting rod The sixth hinge and the seventh hinge formed by the connecting rod are located in the small arc guide rail 307 .

Preferably, the first connecting rod located above the horizontal guide rail and a second connecting rod far away from the backrest are respectively rotatably connected to the side panels on both sides of the seat cushion, and the top of a second connecting rod close to the backrest is rotatably connected to the connecting rod. The rod is fixedly connected with the pinion, the pinion is hinged on the side plate, the third connecting rod above the guide rail is hinged with the short bar, the short bar is hinged with the side plate, and the nut is fixedly connected with the first hinge.

Preferably, the backrest gear mechanism includes a first pinion, a second pinion and a large gear. The second pinion is rotatably mounted on the side plate on one side of the seat cushion, and the second pinion meshes with the first pinion.

Preferably, the backrest and the seat cushion are rotatably connected through a rotating shaft, and a large gear 401 is arranged on the rotating shaft, and the large gear 401 is fixedly connected with the backrest, and the large gear 401 meshes with the small gear.

Preferably, the outstretched stair climbing mechanism includes a forward outrigger fixed at the front side position below the wheelchair frame 1, and a stair climbing wheel 502 is installed on the forward outrigger, and the wheelchair frame 1 is also provided with a Front wheels 503 and rear wheels 501. The wheelchair frame 1 is used for supporting and fixing various parts.

Principle of work: Incomplete gear 201 massage mechanism 2 and backrest gear mechanism 4 are installed at the wheelchair rear side, screw transmission link mechanism 3 is all positioned at the lower side of the seat, and the overhanging stair climbing mechanism overhangs the wheelchair front.

The incomplete gear 201 is driven to rotate by the first servo motor, the incomplete gear 201 meshes with the rack frame, and the incomplete gear 201 meshes successively on the left and right sides of the rack frame to realize the up and down reciprocating motion of the rack 202, Because massage wheel 203 is fixedly connected with rack 202 frame, therefore also reaches the function of massaging old man's back with its reciprocating motion.

The rotary motion of the output shaft of the second servo motor is converted into the left and right linear motion of the nut on the screw rod through screw transmission, and the nut is fixedly connected with the first hinge 302 on the intersection point of the connecting rod. Therefore, the first hinge follows the nut on the horizontal guide rail 303 Up and down linear motion drives the fourth hinge 301 and the fifth hinge 305 to move on the large arc guide rail 304, the sixth hinge 306 and the seventh hinge 309 move on the small arc guide rail 307, and the third hinge 308 moves on the horizontal guide rail 303 This process realizes the angle and height change of the connecting rod in the vertical direction.

As a second connecting rod close to the backrest rotates, the second connecting rod drives the connecting rod to move, the angle between the two changes, and at the same time the angle between the connecting rod and the vertical direction changes, realizing the top of the connecting rod The effect of rotating around the rotation center of pinion one, because the connecting rod is fixedly connected with pinion one, and pinion one is hinged with the side plate, so pinion one will rotate along the center of its hinge with the side plate, and pinion two 402 Mesh with pinion 1 403, so pinion 2 402 rotates at a certain angle due to the rotation of pinion 1, and pinion 2 402 meshes with large gear 401 to make large gear 401 rotate, and the backrest is fixedly connected with large gear 401 to realize The chair back tilts back as it rises.

The outstretched stair-climbing mechanism first uses the rear wheel 501 of the wheelchair as a support point when going up the stairs, so that the front end of the chair is upturned, leaving a certain height from the ground, so that the stair-climbing wheel 502 can just land on the next step after landing On the surface, use the wheel as a fulcrum to lift the rear end of the chair, push the wheelchair forward with your hands, and put down the wheelchair when it reaches a suitable position, so that the front wheels 503 and rear wheels 501 of the wheelchair are also on the step surface after landing. When being used for going up the steps continuously, only need to make the rear wheel 501 fall on the step surface, and then the rear wheel 501 is a fulcrum, so that the climbing wheel 502 is tilted.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (8)

1. a kind of multifunctional wheelchair based on multinomial driving, characterized in that including wheelchair frame, be equipped in the wheelchair frame Backrest and cushion, described to be equipped with partial gear massage mechanism by back, the lower section of the cushion is equipped with worm drive connecting rod machine One end of structure, the worm drive link mechanism is connect with wheelchair frame, and the other end is connect with cushion, worm drive link mechanism For driving the rotation of cushion；

The lower end of the wheelchair frame is equipped with overhanging Climbing building device, and the overhanging Climbing building device is used for speeling stairway.

2. the multifunctional wheelchair as described in claim 1 based on multinomial driving, characterized in that the partial gear massager Structure includes the first servo motor being fixed on wheelchair backrest, and output shaft and the partial gear of the first servo motor are fixed Connection, the outer sheath of the partial gear have a rack gear frame, the partial gear successively with the left and right sides rack gear of rack gear frame Engagement, realizes rack gear frame pumping relative to backrest, and massage wheels are fixed on the front end of rack gear frame.

3. the multifunctional wheelchair as described in claim 1 based on multinomial driving, characterized in that the worm drive link mechanism Including screw rod, nut and the second servo motor, second servo motor is fixedly installed in the wheelchair frame on the downside of cushion, the The output shaft of two servo motors is fixedly connected with screw rod, and screw rod is equipped with nut.

4. the multifunctional wheelchair as claimed in claim 3 based on multinomial driving, characterized in that the worm drive link mechanism It further include a pair of of first connecting rod, a pair of of second connecting rod, a pair of of third connecting rod and great circle arc guide rail, roundlet arc guide rail, orthodrome Guide rail and roundlet arc guide rail are all fixed in the wheelchair frame below backrest, and wheelchair frame is equipped with horizontal guide rail, the great circle Arc guide rail and roundlet arc guide rail are symmetrical respectively about horizontal guide rail, the first axle of two first connecting rods, two second connecting rods Second hinge and the third hinge of two third connecting rods are located on horizontal guide rail, and two first connecting rods connect with second respectively Bar is hinged, and two second connecting rods are hinged with third connecting rod respectively, the 4th hinge and the 5th that first connecting rod and second connecting rod are formed Hinge is located in great circle arc guide rail, and the 6th hinge and the 7th hinge of second connecting rod and third connecting rod are located in roundlet arc guide rail.

5. the multifunctional wheelchair as claimed in claim 4 based on multinomial driving, characterized in that above horizontal guide rail One connecting rod and a second connecting rod far from backrest are rotatablely connected with the side plate of cushion two sides respectively, close to one piece of backrest the It is rotatablely connected at the top of two connecting rods with connecting rod, connecting rod is fixedly connected with pinion gear one, and pinion gear one is hinged on side plate, is located at Third connecting rod above guide rail is hinged with quarter butt, and quarter butt is hinged with side plate, and the nut is fixedly connected with first axle.

6. the multifunctional wheelchair as described in claim 1 based on multinomial driving, characterized in that also installed on rear side of the wheelchair There is a backrest gear mechanism, the backrest gear mechanism includes pinion gear one, pinion gear two and gear wheel, the cushion side Pinion gear two is rotatably equipped on side plate, pinion gear two is engaged with pinion gear one.

7. the multifunctional wheelchair as claimed in claim 6 based on multinomial driving, characterized in that the backrest and cushion are by turning Axis rotation connection, shaft are equipped with gear wheel, and the gear wheel is fixedly connected with backrest, and the gear wheel is nibbled with pinion gear two It closes.

8. the multifunctional wheelchair as described in claim 1 based on multinomial driving, characterized in that the overhanging Climbing building device includes It is fixed on the extension supporting leg of forward position below wheelchair frame, building climbing wheel, the wheelchair frame are installed on the extension supporting leg Lower section be additionally provided with front wheels and rear wheels.