CN109481162B

CN109481162B - Manually adjustable wheelchair

Info

Publication number: CN109481162B
Application number: CN201811208753.6A
Authority: CN
Inventors: 栾飞; 桓源; 金家庚; 马家豪
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2018-10-17
Filing date: 2018-10-17
Publication date: 2020-06-02
Anticipated expiration: 2038-10-17
Also published as: CN109481162A

Abstract

The invention discloses a manually adjustable wheelchair, when a person is on a seat of the wheelchair and the wheelchair replaces a bed with the wheelchair, a manual rod can be manually rotated, power is transmitted to a bidirectional gear through the matching of a bevel gear set, and then the power is further transmitted to other gears through chain transmission, so that the posture of the person on the wheelchair is controlled, the operation is simple, the stability is good, the weight of the wheelchair is reduced by adopting a hollow pipe, the wheelchair is light and convenient, and the comfort requirement of the user on the wheelchair can be met.

Description

Manually adjustable wheelchair

Technical Field

The invention belongs to the technical field of daily life auxiliary tools, and particularly relates to a manually adjustable wheelchair.

Background

With the development of aging population and the increase of the number of disabled people, the development of wheelchairs is becoming an indispensable tool for riding instead of walk in the life of people, and the technical requirements and the use requirements of people on wheelchairs, multifunctional comfort and the like are improved. The use performance of the traditional wheelchair mainly has the following defects in the use of daily life. The traditional wheelchair can not realize the function of lying on the high backrest and the function of turning the pedals at an angle in the use process. Can not meet the comfort requirement of users and can not be adjusted at any angle. The wheelchair needs to transmit force to the wheel by the arm of a user during moving to achieve the purpose of advancing. The wheelchair has the advantages of large mass, heavy weight and poor stability.

Disclosure of Invention

The invention aims to provide a manually adjustable wheelchair, which realizes the function of lying a high backrest and the function of turning the angle of a pedal of the wheelchair.

The invention adopts the technical scheme that the wheelchair capable of being manually adjusted comprises a support, wherein the support consists of two parallel L-shaped tubes and a plurality of connecting rods arranged between the two L-shaped tubes, wheels are respectively connected to two sides of the corner of the support through wheel shafts, the connecting rod is fixed at one end, far away from the corner, of the two parallel L-shaped tubes of the support in the horizontal direction, a universal wheel is connected onto the connecting rod, the universal wheel is connected with two small wheels through a bearing, the ends, far away from the corner, of the two parallel L-shaped tubes of the support in the horizontal direction are respectively connected with a lead screw in the vertical direction, nuts matched with the lead screws are respectively sleeved on the two lead screws, the connecting rod is further connected between the two lead screws, a first chain wheel is fixedly connected onto the connecting rod, and;

a panel is laid at the top ends of the screw rod and the bracket, an L-shaped fixed pipe is fixedly connected to one side of the panel, one end of the L-shaped fixed pipe is abutted against one side of the panel, a hand lever is connected to the port of the L-shaped fixed pipe, the other end of the L-shaped fixed pipe extends into the lower part of the panel and is separated from the panel, and a second chain wheel is fixedly connected to the other end of the L-shaped; one side that the panel is close to the lead screw has the board through hinge connection, the board pass through the connecting rod respectively with lead screw connection, there is the backup plate one side that the panel is close to the support through hinge connection, the back and the backup plate both sides limit parallel arrangement of backup plate have a slide rail, the slide rail is embedded to have a slider, the slider passes through telescopic link and leg joint, the one end fixedly connected with third sprocket of telescopic link linking bridge, first sprocket passes through the chain with the third sprocket and is connected in the second sprocket respectively.

The invention is also characterized in that:

the support is a hollow pipe, and the connecting rods are connected with the support through bevel gear sets;

the matching parts of the lead screw, the bracket and the panel are connected through a thrust ball bearing, and the lead screw is a single-head lead screw;

the manual rod, the second chain wheel and the L-shaped fixed pipe are connected through a bevel gear set;

wherein the second sprocket is a bidirectional sprocket;

the joint of the plate and the connecting rod is a hinge structure, and the connecting rods are respectively connected to the nuts through the hinge structures;

the telescopic part of the telescopic rod is telescopic through the rotation of the threaded structure.

The invention has the advantages that

The manually adjustable wheelchair can be adjusted at any angle on the backrest and the pedals in the using process, and meanwhile, the rocker can be manually transmitted to save labor in the moving process.

Drawings

FIG. 1 is a schematic view of a manually adjustable wheelchair in accordance with the present invention;

FIG. 2 is a side elevational schematic view of a manually adjustable wheelchair in accordance with the present invention;

FIG. 3 is a top plan schematic view of a manually adjustable wheelchair of the present invention;

FIG. 4 is a rear elevational view of a manually adjustable wheelchair in accordance with the present invention;

FIG. 5 is a schematic view of a manually adjustable wheelchair transmission of the present invention;

in the figure, 1, a support, 2, wheels, 3, connecting rods a, 4, universal wheels, 5, a screw rod, 6, a nut, 7, connecting rods b, 8, a first chain wheel, 9, a panel, 10, an L-shaped fixed pipe, 11, a manual rod, 12, a second chain wheel, 13, a plate, 14, connecting rods c, 15, a backup plate, 16, a sliding rail, 17, a sliding block, 18, a telescopic rod, 19 and a third chain wheel are arranged.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention provides a manually adjustable wheelchair, which comprises a support, wherein the support 1 consists of two parallel L-shaped tubes and a plurality of connecting rods arranged between the two L-shaped tubes, the connecting rods are connected with the support 1 through bevel gear sets, wheels 2 are respectively connected to two sides of the corner of the support 1 through wheel shafts, a connecting rod a3 is fixed at one end, far away from the corner, of the support 1 in the horizontal direction between the two L-shaped tubes, a universal wheel 4 is connected to the connecting rod a3, and the universal wheel 4 is connected with two small wheels through a bearing; as shown in fig. 3, nuts 6 matched with the two lead screws 5 are respectively sleeved on the two lead screws 5, a connecting rod b7 is further connected between the two lead screws 5, a first chain wheel 8 is fixedly connected to the connecting rod b7, and the top ends of the lead screws 5 are as high as the top end of the support 1;

a panel 9 is laid on the top ends of the screw rod 5 and the support 1, the matching parts of the screw rod 5, the support 1 and the panel 9 are connected through a thrust ball bearing, the screw rod 5 is a single-head screw rod, as shown in fig. 5, one side of the panel 9 is fixedly connected with an L-shaped fixed pipe 10, one end of the L-shaped fixed pipe 10 abuts against one side of the panel 9, a port is connected with a manual lever 11, the other end of the L-shaped fixed pipe 10 extends into the lower part of the panel 9 and is separated from the panel 9, a second chain wheel 12 is fixedly connected, the second chain wheel 12 is a bidirectional chain wheel, a bevel gear shaft is arranged inside the L-shaped fixed pipe 10, and bearings are arranged at the matching parts of the manual lever 11; one side, close to the screw 5, of the panel 9 is connected with a plate 13 through a hinge, the plate 13 is respectively connected with the screw 5 through a connecting rod c14, the joint of the plate 13 and the connecting rod c14 is of a hinge structure, and the connecting rods c14 are respectively connected to the nuts 6 through the hinge structure; one side that panel 9 is close to support 1 has backup plate 15 through hinge connection, as shown in fig. 4, the back of backup plate 15 and backup plate 15 both sides limit parallel arrangement have a slide rail 16, slide rail 16 is embedded to have a slider 17, slider 17 passes through telescopic link 18 and is connected with support 1, the one end fixedly connected with third sprocket 19 of telescopic link 18 linking bridge 1, first sprocket 8 passes through the chain with third sprocket 19 and is connected in second sprocket 12 respectively, the flexible position of telescopic link 18 is helicitic texture.

The advantages of a manually adjustable wheelchair according to the invention are explained from the operating principle:

when a person is on a seat of the wheelchair, in order to realize the function that a person with mobility disabilities replaces a bed with the wheelchair, the manual rod 11 can be manually rotated, then the manual rod 11 is driven by a bevel gear set to be arranged on a second chain wheel 12 (namely a bidirectional chain wheel) of the L-shaped fixed pipe 10, then the second chain wheel 12 further transmits power to the first chain wheel 8 through chain transmission, then the first chain wheel 8 drives a connecting rod a3 which is arranged at one end of the bracket 1 far away from the corner in the horizontal direction, and the connecting rod a3 transmits the power to the two lead screws 5 to drive the lead screws 5 to rotate due to the connection of the a3 and the lead screws 5 through the bevel gear set, so that the nut 6 matched with the connecting rod is driven to rotate back and forth on the lead screws 5, and the connecting rod driving plate 13 connected to the nut 6 is adjusted between 90 degrees and 180; on the other hand, the second chain wheel 12 drives the third chain wheel 19 to rotate through chain transmission, the third chain wheel 19 drives one end of the connecting telescopic rod 18 to rotate and stretch, the sliding block 17 connected to the other end of the telescopic rod 18 drives the sliding block 17 to move on the sliding rail 16 due to the stretching of the telescopic rod 18, and then the angle of the backup plate 15 is driven, in conclusion, the angle between the manual rod 11 and the backup plate 15 is finally controlled, so that the posture of a person sitting on the wheelchair is adjusted, the universal wheel 4 can freely change the advancing direction, and the wheelchair is convenient and fast.

The invention provides a manually adjustable wheelchair, which adopts a simpler mechanical structure to enable a user to adjust the wheelchair and a reclining chair by the manual adjustable wheelchair in order to meet the adjustment of the user at any angle between a backrest and a pedal; the product adopts a hollow tube structure, so that the comfort requirement of a user on the wheelchair can be met, and the physical requirements of the product such as toughness and the like can also be met; traditional wheelchair needs the hand to reach the removal to the wheel hub application of force at the removal in-process, and this product will reduce the hand greatly and to the power of wheel hub, adopts the rocker, satisfies quick travel's purpose, and the quality of product itself compares in traditional wheelchair greatly reduced, and stability is better.

Claims

1. A manually adjustable wheelchair is characterized by comprising a support (1), wherein the support (1) consists of two parallel L-shaped tubes and a plurality of connecting rods arranged between the two L-shaped tubes, wheels (2) are respectively connected to two sides of a corner of the support (1) through wheel shafts, a connecting rod a (3) is fixed to one end, far away from the corner, of the support (1) in the horizontal direction between the two parallel L-shaped tubes, a universal wheel (4) is connected to the connecting rod a (3), the universal wheel (4) is connected with two small wheels through a bearing, lead screws (5) are respectively connected to one ends, far away from the corner, of the support (1) in the horizontal direction of the two parallel L-shaped tubes in the vertical direction, nuts (6) matched with the lead screws are respectively sleeved on the two lead screws (5), a connecting rod b (7) is further connected between the two lead screws (5), and a first chain wheel (8) is, the top end of the lead screw (5) is equal to the top end of the bracket (1) in height;

a panel (9) is laid at the top ends of the screw rod (5) and the support (1), one side of the panel (9) is fixedly connected with an L-shaped fixed pipe (10), one end of the L-shaped fixed pipe (10) abuts against one side of the panel (9), the port of the L-shaped fixed pipe is connected with a manual rod (11), the other end of the L-shaped fixed pipe (10) extends into the lower part of the panel (9) and is separated from the panel (9), a second chain wheel (12) is fixedly connected with the L-shaped fixed pipe, and the second chain wheel (12) is a bidirectional chain wheel; one side, close to the screw rod (5), of the panel (9) is connected with a plate (13) through a hinge, the plate (13) is connected with the screw rod (5) through a connecting rod c (14), the joint of the plate (13) and the connecting rod c (14) is of a hinge structure, and the connecting rod c (14) is connected to the nut (6) through the hinge structure; one side of the panel (9) close to the support (1) is connected with a backup plate (15) through a hinge, sliding rails (16) are arranged on the back of the backup plate (15) and on two side edges of the backup plate (15) in parallel, sliding blocks (17) are embedded in the sliding rails (16), the sliding blocks (17) are connected with the support (1) through telescopic rods (18), one end of each telescopic rod (18) is fixedly connected with a third chain wheel (19) of the support (1), and the first chain wheel (8) and the third chain wheel (19) are connected with a second chain wheel (12) through chains respectively.

2. The manually adjustable wheelchair as claimed in claim 1, wherein the frame (1) is a hollow tube, and a plurality of connecting rods are connected with the frame (1) through bevel gear sets.

3. The manually adjustable wheelchair as claimed in claim 1, wherein the screw (5) is connected to the support (1) and the panel (9) at their respective engagement points by means of a thrust ball bearing, and the screw (5) is a single-ended screw.

4. A manually adjustable wheelchair according to claim 1, characterised in that the hand lever (11) and the second chain wheel (12) are connected to the L-shaped stationary tube (10) by means of a set of bevel gears.

5. A manually adjustable wheelchair in accordance with claim 1, characterized in that the extension and retraction of the extension and retraction rod (18) is achieved by rotation of a screw structure.