CN213883889U

CN213883889U - Wheelchair with rising assisting and lifting functions

Info

Publication number: CN213883889U
Application number: CN202022326201.4U
Authority: CN
Inventors: 郑鹏飞; 刘泽健; 包卫平
Original assignee: Hangzhou Polytechnic
Current assignee: Hangzhou Polytechnic
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-08-06
Anticipated expiration: 2030-10-19

Abstract

The utility model discloses a wheelchair with rising power assisting and lifting functions. It mainly comprises a wheelchair body, a chassis lifting mechanism and a rising power-assisted mechanism. The chassis lifting mechanism can be used for changing the height of the wheelchair, so that the problem that the wheelchair is inconvenient for a user to get on or off the wheelchair due to the fact that the height of the medical diagnosis equipment is not matched with the height of the household equipment is solved, and convenience is provided for maintenance of a wheelchair driving system; the rising power-assisted mechanism is used for assisting a user to rise; the main driving wheel at the bottom of the wheelchair body adopts a pneumatic tire and is directly driven by the brushless hub motor, so that the safety performance is improved. The utility model has the characteristics of the simple operation, the function is various, and it is convenient to maintain, the design hommization.

Description

Wheelchair with rising assisting and lifting functions

Technical Field

The utility model belongs to the technical field of wheelchair equipment, concretely relates to wheelchair with helping hand of getting up and lifting function.

Background

The wheelchair generally refers to a chair provided with wheels to help replace walking, and is mainly used for home rehabilitation, turnover transportation, treatment and outgoing activities of wounded persons, patients, disabled persons and old people. The wheelchair can meet the requirements of physically disabled persons and persons with mobility disabilities for riding instead of walk, and is more convenient for family members to move and take care of patients, so that the patients can do physical exercise and participate in social activities by means of the wheelchair.

The common wheelchair generally comprises a foldable frame, wheels, a backrest, pedals, armrests, a seat and the like, and can be pushed by nursing staff to walk or automatically walk. And part of the wheelchairs also have the function of adjusting the angle of the backrest. However, with the continuous improvement of the living standard of people and the simplification of family members, the use demand of the wheelchair is gradually increased, and the demand on the function of the wheelchair is also gradually increased, for example, the muscle strength of the lower limbs of the old or the patient using the wheelchair is weakened, the body posture is difficult to adjust, and the body is difficult to rise; when the old or the patient is transferred from the wheelchair to the bed, the chair and the diagnosis and treatment equipment, the transfer process is inconvenient because the height of the wheelchair is usually low; the old and the sick are difficult to reach the high articles in daily life.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, solve the problems and the defects existing in the prior wheelchair and provide a wheelchair with the standing-up assisting and lifting functions.

For solving the technical problem, the technical scheme of the utility model as follows:

the utility model discloses a wheelchair with rising power-assisted and lifting functions, which is characterized in that the wheelchair comprises a wheelchair body, a chassis lifting mechanism and a rising power-assisted mechanism;

the chassis lifting mechanism is arranged at the bottom of the wheelchair body, and the rising power-assisted mechanism is used as a user sitting area and is positioned in the middle of the wheelchair body; the bottom of the wheelchair body is provided with a main driving wheel and an auxiliary wheel;

the chassis lifting mechanism comprises an upper support frame, a lower support frame, two scissor-type lifting rods and a first driving device; wherein the upper supporting frame is fixedly connected with the wheelchair body; the two scissor-type lifting rods are respectively positioned at two sides of the chassis lifting mechanism, the upper part of the two scissor-type lifting rods is connected with the upper support frame, the lower part of the two scissor-type lifting rods is connected with the lower support frame, the first driving device is an electric push rod, the electric push rod is fixedly arranged on one support frame, the output end of the electric push rod is connected with the other support frame, and the distance between the two support frames can be adjusted on the premise of keeping the upper support frame and the lower support frame parallel through the movement of the electric push rod; when the chassis lifting mechanism is completely contracted, the lower support frame is higher than the main driving wheel at the bottom of the wheelchair body; when the chassis lifting mechanism is fully extended, the lower support frame can contact the ground and lift the wheelchair;

the rising assisting mechanism comprises a cushion, a link mechanism, a base and a second driving device; the base is fixedly connected with the wheelchair body, the link mechanism is connected with the cushion and the base, the second driving device is arranged on the base, the output end of the second driving device is connected with the rear portion of the cushion, and the angle of the cushion relative to the base can be adjusted.

Preferably, the scissor-type lifting rod consists of a first lifting rod and a second lifting rod, the middle parts of which are hinged with each other; horizontal slideways are arranged on the upper supporting frame and the lower supporting frame; the top end of the first lifting rod is hinged with the upper support frame, and the bottom end of the first lifting rod is arranged in a horizontal slide way of the lower support frame and can slide along the slide way; the top of second pole sets up and to slide along the slide in the slide of upper bracket, and the bottom is articulated with the lower carriage.

Preferably, the link mechanisms of the rising power-assisted mechanism are five link mechanisms, and the two link mechanisms are respectively positioned at two sides of the rising power-assisted mechanism.

Preferably, the five-link mechanism consists of a first link, a second link, a third link, a fourth link and a fifth link, wherein the first link is arranged on the side edge of the support piece at the bottom of the cushion and is parallel to the plane of the cushion, the first link is provided with a chute structure, and a slide block is arranged in the chute; one end of the fourth connecting rod is hinged with the fifth connecting rod, and the other end of the fourth connecting rod is hinged with the first connecting rod; one end of the second connecting rod is hinged with the fifth connecting rod, the other end of the second connecting rod is hinged with the sliding block in the first connecting rod sliding groove, one end of the third connecting rod is hinged with the middle part of the fourth connecting rod, the other end of the third connecting rod is hinged with the sliding block in the first connecting rod sliding groove, and the sliding block can slide in the first connecting rod sliding groove, so that the five-connecting-rod mechanism is prevented from being locked; the second connecting rod is positioned at the front side of the fourth connecting rod, and the length ratio of the second connecting rod to the fourth connecting rod is 1: 4-6.

Preferably, the main driving wheel adopts a pneumatic tire; directly driven by a brushless hub motor, and two main driving wheels on two sides of the wheelchair body are independently driven.

Preferably, the wheelchair with the rising power-assisted and lifting functions further comprises a power supply module, the power supply module is a storage battery, and the power supply module comprises a first power supply unit for supplying power to the main driving wheel and a second power supply unit mainly used for supplying power to the chassis lifting mechanism and the rising power-assisted mechanism; the output voltage of the first power supply unit is the same as that of the second power supply unit, and a standby power supply circuit is arranged between the second power supply unit and the main driving wheel and used for performing standby power supply when the electric quantity of the first power supply unit is insufficient.

Preferably, the auxiliary wheel including set up the auxiliary roller in wheelchair body bottom front side, the back universal wheel install on the universal wheel welt, it is articulated between universal wheel welt front end and the wheelchair body, still link to each other through damping spring between universal wheel welt top and the wheelchair body, the last adjust knob that is equipped with adjustable damping spring's soft or hard degree of damping spring.

Compared with the prior art, the utility model discloses the beneficial effect who has includes:

1) the utility model discloses a helping hand mechanism of rising compensates the old man and stands the gesture from sitting and convert the shank strength that the gesture lacked of standing into, makes the old man in the process of rising can be with the help of certain external force supplementary through drive arrangement drive cushion motion, lets the old man easily leave the seat.

2) Chassis lifting mechanism can help the old man when sitting and standing, also can realize the eminence and get the thing, increases the purpose in field of vision, when the tie was lain, the adjustment tie was lain the height or is convenient to make a round trip to move on other equipment platforms that have the difference in height. The chassis lifting mechanism can realize three actions of lifting, stopping and descending under any posture of the wheelchair. Can realize the functions of fetching objects from high places, widening the visual field, being highly compatible and the like. And brings convenience for maintenance personnel to maintain the wheelchair in the later period.

3) The utility model discloses an installed damping spring additional on the rear universal wheel and promoted the comfort that the old man took, damping spring installs on the universal wheel welt, is fixed by spring bracket, adopts the connected form of triangle structure, can adjust damping spring's soft or hard degree through adjust knob according to the person of taking hobby.

The main driving wheel of the utility model adopts the brushless hub motor to directly drive, thus reducing the energy loss of a gear reduction system and a transmission system required by the traditional motor; the occupied space is saved; the chassis lifting mechanism is arranged in a free space. The main driving wheel uses the pneumatic tire, which greatly improves the riding comfort, the tread adopts the rubber material, the texture design increases the friction, and the safety performance is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the wheelchair of the present invention;

FIG. 2 is a schematic structural view of a wheelchair chassis lifting mechanism (extended state);

FIG. 3 is a schematic structural view (retracted state) of the lifting mechanism of the wheelchair chassis;

fig. 4 is a schematic view of the chassis lifting mechanism in an operating state for use.

FIG. 5 is a schematic structural view (raised state) of the wheelchair rising assist mechanism;

FIG. 6 is a schematic structural view of the wheelchair rising assist mechanism (in a state of descending to the lowest point);

FIG. 7 is a schematic view of the overall structure of the wheelchair when the rising power-assisted mechanism is lifted;

fig. 8 is a schematic diagram of a user rising process with assistance of the rising power-assisted mechanism.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the embodiment provides a wheelchair with rising power and lifting functions, which mainly comprises a wheelchair body 1, a chassis lifting mechanism 2 and a rising power-assisted mechanism 3;

wherein the wheelchair body 1 can satisfy the required wheelchair of chassis lifting mechanism 2 and the installation of helping hand mechanism 3 of getting up and motion space wantonly among the prior art, and the frame of wheelchair body is preferred to adopt metal material, like the aluminum alloy material to alleviate wheelchair weight and reach the strength requirement.

As shown in fig. 1, the chassis lifting mechanism 2 is arranged at the bottom of the wheelchair body 1, and the rising power-assisted mechanism 3 is positioned in the middle of the wheelchair body 1 as a user sitting area; the bottom of the wheelchair body 1 is provided with a main driving wheel 11 and an auxiliary wheel; the main driving wheel 11 is used for driving the wheelchair to move, and the auxiliary wheel is mainly used for assisting the main driving wheel 11 to turn and keeping the stability of the wheelchair body in the moving process.

As shown in fig. 2 and 3, the chassis lifting mechanism 2 includes an upper support frame 21, a lower support frame 22, two scissor lift rods 23, and a first driving device 24; wherein the upper supporting frame 21 is fixedly connected with the wheelchair body 1; the two scissor-type lifting rods 23 are respectively positioned at two sides of the chassis lifting mechanism 2, the upper part of the two scissor-type lifting rods is connected with the upper support frame 21, the lower part of the two scissor-type lifting rods is connected with the lower support frame 22, the first driving device 24 is an electric push rod, the electric push rod is fixedly arranged on one support frame, the output end of the electric push rod is connected with the other support frame, and the distance between the two support frames can be adjusted on the premise of keeping the upper support frame and the lower support frame parallel through the movement of the electric push rod; when the chassis lifting mechanism 2 is completely contracted, the lower support frame 22 is higher than the main driving wheel at the bottom of the wheelchair body; when the chassis lifting mechanism 2 is fully extended, the lower support frame 22 may contact the ground and raise the wheelchair.

In a preferred embodiment of the present invention, the scissor-type lifting rod 23 comprises a first lifting rod 231 and a second lifting rod 232 hinged to each other at the middle; horizontal slideways 25 are arranged on the upper support frame 21 and the lower support frame 22; the top end of the first lifting rod 231 is hinged with the upper support frame 21, and the bottom end of the first lifting rod is arranged in a horizontal slide way of the lower support frame 22 and can slide along the slide way; the top end of the second lifting rod 232 is arranged in the slide way of the upper support frame 21 and can slide along the slide way, and the bottom end of the second lifting rod is hinged with the lower support frame 22.

The chassis lifting mechanism can help the old people to take objects from high positions when sitting and standing, the purpose of increasing the visual field can be achieved, and the functions of taking objects from high positions, widening the visual field, being highly compatible and the like can be achieved. And brings convenience for maintenance personnel to maintain the wheelchair in the later period. Because the plane height of the bed in the bedroom or the nursing bed in the ward all will be higher than the wheelchair, so the transfer of old man between wheelchair and bed is extremely inconvenient, and the utility model discloses a wheelchair height can be adjusted to chassis lifting mechanism, and the old man of being convenient for lets the old man liberate both hands between wheelchair, bed, provides bigger facility for getting up, sitting in.

As shown in fig. 4, a schematic use diagram of a user simultaneously using a chassis lifting mechanism and a raising assist mechanism to achieve high-altitude fetching is shown. The lower support frame 22 of the chassis lifting mechanism should be as large as possible to ensure that the wheelchair remains stable when raised. The wheelchair should be lifted to the bottom of the pool as much as possible. Preferably, the periphery or the middle position of the bottom of the lower support frame 22 is further provided with a plurality of rubber support pads.

The muscle strength of old person weakens mainly and shows that, the waist and legs are weak, and this lets stand up and has become a big difficult problem that the old person lives alone, so the utility model discloses set up the helping hand mechanism of standing up, its effect is exactly for remedying the old person from sitting the posture and converting the shank strength that the gesture of standing is lacked into, makes the old person can easily leave the seat with the help of certain external force in the process of standing up through specific helping hand mechanism. As shown in fig. 5 and 6, the rising assist mechanism 3 includes a seat cushion 31, a link mechanism 32, a base 33 and a second driving device 34; the base 33 is fixedly connected with the wheelchair body 1, the link mechanism 32 is connected with the seat cushion 31 and the base 33, the second driving device 34 is arranged on the base 33, the output end of the second driving device is connected with the rear part of the seat cushion 31, and the angle of the seat cushion 31 relative to the base 33 can be adjusted.

In this embodiment, the link mechanisms 32 of the rising assist mechanism 3 are five link mechanisms, the two link mechanisms are two in total and are respectively located at two sides of the rising assist mechanism 3, and the seat cushion 31 is lifted in the angle adjusting process.

As shown in fig. 5, the five-bar linkage mechanism is composed of a first bar 321, a second bar 322, a third bar 323, a fourth bar 324 and a fifth bar 325, wherein the first bar 321 is installed at the side of the bottom supporting member of the seat cushion 31 and is parallel to the plane of the seat cushion, the bar is provided with a chute structure, and a sliding block 320 is arranged in the chute; the fifth connecting rod 325 is arranged on the side edge of the top of the base 33 and is parallel to the plane of the base; one end of the fourth connecting rod 324 is hinged with the fifth connecting rod 325, and the other end is hinged with the first connecting rod 321; one end of the second connecting rod is hinged with the fifth connecting rod 325, the other end of the second connecting rod is hinged with the sliding block 320 in the sliding groove of the first connecting rod 321, one end of the third connecting rod 323 is hinged with the middle part of the fourth connecting rod 324, the other end of the third connecting rod is hinged with the sliding block 320 in the sliding groove of the first connecting rod 321, and the sliding block can slide in the sliding groove of the first connecting rod 321 to avoid the five-connecting-rod mechanism from being blocked; the second connecting rod 322 is positioned at the front side of the fourth connecting rod 324, and the length ratio is 1: 4-6; in this embodiment, the length of the second link is 6cm, and the length of the fourth link is 30 cm.

In the present embodiment, the main driving wheel 11 is a pneumatic tire; the wheelchair is directly driven by a brushless hub motor, and two main driving wheels 11 on two sides of the wheelchair body 1 are independently driven; the brushless hub motor reduces the energy loss of a gear reduction system and a transmission system required by the traditional motor; the occupied space is saved; the chassis lifting mechanism is arranged in a free space. The main driving wheel 61 adopts a pneumatic tire, so that the riding comfort is greatly improved, the tread is made of rubber materials, the texture design increases the friction, and the main driving wheel is anti-skidding, wear-resistant, puncture-resistant and improves the safety performance.

In this embodiment, the auxiliary wheel including set up the auxiliary roller 13 in 1 bottom front side of wheelchair body, back universal wheel 12 install on the universal wheel welt, articulated between universal wheel welt front end and the wheelchair body 1, still link to each other through damping spring between universal wheel welt top and the wheelchair body 1, the last adjust knob who is equipped with the soft or hard degree of adjustable damping spring of damping spring. The damping spring is additionally arranged on the rear universal wheel to improve the riding comfort of the old people, the damping spring is arranged on the universal wheel lining plate and fixed by the spring support, the connection form of a triangular structure is adopted, the hardness degree of the damping spring can be adjusted by adjusting the knob according to the preference of a user, the rear universal wheel supports the weight of the chassis part, and the shake caused by uneven road surfaces is reduced; the rotation of direction is realized to cooperation main drive wheel.

In a preferred embodiment of the present invention, the wheelchair with the standing-up assisting and lifting functions further comprises a power supply module, the power supply module is a storage battery, and the power supply module comprises a first power supply unit for supplying power to the main driving wheel and a second power supply unit for mainly supplying power to the chassis lifting mechanism 2 and the standing-up assisting mechanism 3; the output voltage of the first power supply unit is the same as that of the second power supply unit, and a standby power supply circuit is arranged between the second power supply unit and the main driving wheel and used for performing standby power supply when the electric quantity of the first power supply unit is insufficient. In this embodiment, the first power supply unit and the second power supply unit both use 36V ternary lithium batteries.

Furthermore, the wheelchair can also comprise auxiliary equipment, wherein the auxiliary equipment comprises a folding illuminating lamp, a GPS positioning module, a telescopic headrest, a rotatable storage dining plate and a USB power supply port, the folding illuminating lamp is hinged to two sides of the wheelchair body 1, and the folding illuminating lamp can be attached to the wheelchair body 1 when the hinged part is folded; the GPS positioning module is arranged in the wheelchair body 1, the telescopic headrest is positioned at the top of the backrest to increase head support and comfort, and the rotatable storage dining plate is hinged on the handrail on one side to facilitate dining; the USB power supply port can charge the portable mobile equipment.

In one embodiment of the present invention, all the first driving device and the second driving device (the push rod motor) are arranged in the middle, so as to ensure the stable performance of the rising assistance and the lifting process. The driving device selects an electric push rod with relatively low working speed.

The utility model discloses a first drive arrangement, second drive arrangement and main drive wheel all can carry out independent control through the switch on each drive circuit (through the direction with corresponding drive circuit intercommunication and change output current), also can further integrate into control module, for example adopt the singlechip (can also cooperate the relay when needing) to control as control module.

The utility model discloses a wheelchair body 1 adopts removable design, contains the running-board, and the shank backup plate, the back, component parts such as handrail, component parts all can be dismantled, are convenient for maintain, change, the repacking.

As shown in figure 8, when the utility model is used, when the old needs to get up, the push rod motor positive rotation circuit of the power-assisted mechanism for getting up is connected. The rising power assisting device starts to rise until reaching the top dead center of the mechanism. When a descent is required: the reverse circuit of the push rod motor is connected. The rising power assisting device begins to descend until the lower dead point of the mechanism is reached. In the ascending or descending process, if the push rod needs to stop at a certain stroke, the push rod motor is locked; the rising power-assisted mechanism keeps still.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A wheelchair with rising power-assisted and lifting functions is characterized by comprising a wheelchair body (1), a chassis lifting mechanism (2) and a rising power-assisted mechanism (3);

the chassis lifting mechanism (2) is arranged at the bottom of the wheelchair body (1), and the rising power-assisted mechanism (3) is positioned in the middle of the wheelchair body (1) as a user sitting area; the bottom of the wheelchair body (1) is provided with a main driving wheel (11) and an auxiliary wheel;

the chassis lifting mechanism (2) comprises an upper support frame (21), a lower support frame (22), two scissor-type lifting rods (23) and a first driving device (24); wherein the upper support frame (21) is fixedly connected with the wheelchair body (1); the two scissor type lifting rods (23) are respectively positioned at two sides of the chassis lifting mechanism (2), the upper parts of the two scissor type lifting rods are connected with the upper support frame (21), the lower parts of the two scissor type lifting rods are connected with the lower support frame (22), the first driving device (24) is an electric push rod, the electric push rod is fixedly arranged on one support frame, the output end of the electric push rod is connected with the other support frame, and the distance between the two support frames can be adjusted on the premise of keeping the upper support frame and the lower support frame parallel through the movement of the electric push rod; when the chassis lifting mechanism (2) is completely contracted, the lower support frame (22) is higher than the main driving wheel at the bottom of the wheelchair body; when the chassis lifting mechanism (2) is fully extended, the lower support frame (22) can contact the ground and lift the wheelchair;

the rising power-assisted mechanism (3) comprises a cushion (31), a link mechanism (32), a base (33) and a second driving device (34); the wheelchair is characterized in that the base (33) is fixedly connected with the wheelchair body (1), the link mechanism (32) is connected with the seat cushion (31) and the base (33), the second driving device (34) is arranged on the base (33), the output end of the second driving device is connected with the rear part of the seat cushion (31), and the angle of the seat cushion (31) relative to the base (33) can be adjusted.

2. The wheelchair with rising power and lifting function as claimed in claim 1, wherein the scissor-type lifting rod (23) is composed of a first lifting rod (231) and a second lifting rod (232) which are hinged with each other at the middle part; horizontal slideways (25) are arranged on the upper support frame (21) and the lower support frame (22); the top end of the first lifting rod (231) is hinged with the upper support frame (21), and the bottom end of the first lifting rod is arranged in a horizontal slide way of the lower support frame (22) and can slide along the slide way; the top of second pole (232) of lifting sets up and to slide along the slide in the slide of upper bracket (21), and the bottom is articulated with lower carriage (22).

3. The wheelchair with the rising assistance and the lifting function according to claim 1, wherein the two link mechanisms (32) of the rising assistance mechanism (3) are five-link mechanisms, and the two five-link mechanisms are respectively positioned on two sides of the rising assistance mechanism (3).

4. The wheelchair with the rising assistance and the lifting function according to claim 3, wherein the five-link mechanism consists of a first link (321), a second link (322), a third link (323), a fourth link (324) and a fifth link (325), wherein the first link (321) is installed at the side edge of the support part at the bottom of the cushion (31) and is parallel to the plane of the cushion, the first link (321) is provided with a chute structure, and a slide block (320) is arranged in the chute; one end of the fourth connecting rod (324) is hinged with the fifth connecting rod (325), and the other end of the fourth connecting rod is hinged with the first connecting rod (321); one end of the second connecting rod is hinged with the fifth connecting rod (325), the other end of the second connecting rod is hinged with the sliding block (320) in the sliding groove of the first connecting rod (321), one end of the third connecting rod (323) is hinged with the middle part of the fourth connecting rod (324), the other end of the third connecting rod is hinged with the sliding block (320) in the sliding groove of the first connecting rod (321), and the sliding block (320) can slide in the sliding groove of the first connecting rod (321) to avoid the five-connecting-rod mechanism from being blocked; the second connecting rod (322) is positioned at the front side of the fourth connecting rod (324), and the length ratio is 1: 4-6.

5. The wheelchair with rising power and lifting functions as claimed in claim 1, wherein the main driving wheel (11) is a pneumatic tire; directly driven by a brushless hub motor, and two main driving wheels (11) at two sides of the wheelchair body (1) are independently driven.

6. The wheelchair with the rising power and lifting functions as claimed in claim 1, further comprising a power supply module, wherein the power supply module is a storage battery, and comprises a first power supply unit for supplying power to the main driving wheel and a second power supply unit mainly used for supplying power to the chassis lifting mechanism (2) and the rising power-assisted mechanism (3); the output voltage of the first power supply unit is the same as that of the second power supply unit, and a standby power supply circuit is arranged between the second power supply unit and the main driving wheel and used for performing standby power supply when the electric quantity of the first power supply unit is insufficient.

7. The wheelchair with the rising power assisting function and the lifting function according to claim 1, wherein the auxiliary wheel comprises an auxiliary roller (13) arranged on the front side of the bottom of the wheelchair body (1), a rear universal wheel (12) is mounted on a universal wheel lining plate, the front end of the universal wheel lining plate is hinged with the wheelchair body (1), the top of the universal wheel lining plate is connected with the wheelchair body (1) through a damping spring, and an adjusting knob capable of adjusting the hardness degree of the damping spring is arranged on the damping spring.