CN113648141A

CN113648141A - Multifunctional standing-assisting wheelchair

Info

Publication number: CN113648141A
Application number: CN202110950326.0A
Authority: CN
Inventors: 郭锐; 秦泽航; 郭晨箫; 高明曦; 韩钰; 张锋钊
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2021-11-16
Anticipated expiration: 2041-08-18
Also published as: CN113648141B

Abstract

The invention relates to a multifunctional standing-assisting wheelchair, which comprises a body mechanism, a scissor-fork type standing-assisting sitting mechanism, a backrest mechanism, a pedal mechanism, a brake mechanism, a folding handrail mechanism and a driving system, wherein the body mechanism is arranged on the front of the body mechanism; according to the invention, the hydraulic cylinder drives the scissor type rising-assisting sitting mechanism to lift to help the user stand, the cushion frame is fixedly connected to the top of the scissor type lifting mechanism, the lengths of two scissor arms at the top of the scissor type lifting mechanism are different, so that the cushion frame moves forwards and overturns forwards in the lifting process, the cushion is always attached to the hip of the user in the rising process, the user is more labor-saving and stable in the rising process, and the cushion frame is safer and more reliable, and the connecting mode of the cushion frame and the scissor type lifting mechanism is changed by controlling the opening and closing of the electric control bolt at the bottom of the cushion frame; by changing the connection of the backrest mechanism and the body mechanism, the lifting mode with the inclination trend can be changed into a scissor-fork type lifting bed with a vertical lifting mode, and the conversion between two modes of the lifting-assisted wheelchair and the lifting bed is realized.

Description

Multifunctional standing-assisting wheelchair

Technical Field

The invention relates to the technical field of electric auxiliary wheelchairs, in particular to a multifunctional standing-up assisting wheelchair.

Background

With the rapid development of life and science, wheelchairs have been widely used. The wheelchair is mainly used as a tool for assisting in walking for people with physical disabilities and old people who are inconvenient to move. At present, with the increasing aging population of China and a part of disabled people, the demand of wheelchairs is increasing, and the wheelchairs are inevitably indispensable auxiliary tools. The old people have the phenomenon that many old people have inconvenient legs and feet due to gradual decline of physical functions, if some things need to be carried out or finished independently, a lot of things can be unchanged, and the requirement for auxiliary machinery is gradually increased at present.

However, the conventional auxiliary wheelchair has a complicated mechanism, a large size and a single lifting form, and whether the conventional auxiliary wheelchair can produce a good technical effect in practical application needs to be further discussed. On the basis of the prior art development, the standing-up assisting wheelchair has a great effect on solving the problems of assisting standing up, medical health and the like, and particularly, the standing-up assisting device is more convenient and multifunctional.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a multifunctional standing-assisted wheelchair, which has the advantages of simple structure, convenient operation, strong driving force, safety, reliability, etc., and can effectively solve the problem of combining an inclined standing-assisted mechanism with a horizontal lifting bed.

The technical scheme adopted by the invention is as follows:

the invention provides a multifunctional standing-assisting wheelchair which comprises a body mechanism, a scissor-fork type standing-assisting mechanism, a backrest mechanism, a pedal mechanism, a brake mechanism, a folding handrail mechanism and a driving system, wherein the body mechanism is arranged on the front side of the body mechanism;

the vehicle body mechanism comprises a vehicle frame, wheels, an auxiliary wheel bracket, auxiliary wheels, a guide wheel bracket, guide wheels, a wheel end cover and a bearing A; the wheels are symmetrically connected to two sides of the rear side of the frame through transmission shafts and bearings respectively, and holes in the wheels are hinged with the transmission shafts; the auxiliary wheel bracket is fixedly connected with two auxiliary support rods at the rear side of the frame, and the auxiliary wheel is hinged with the auxiliary wheel bracket; the guide wheel brackets are symmetrically arranged at the bottoms of the two ends of the front side of the frame and are hinged with the bottom of the front side of the frame; the guide wheels are respectively hinged with the guide wheel brackets; the wheel end cover is fixedly connected with an end cover groove on the wheel;

the driving system is arranged above the bottom plate in the frame and is in transmission connection with the wheels, the scissor-fork type rising-assisting mechanism and the folding handrail mechanism respectively; the scissor-fork type rising-assisting and sitting-assisting mechanism is arranged between the left side and the right side of the interior of the frame; the backrest mechanism is arranged on the rear side of the frame; the pedal mechanism is arranged at the bottom of the front side of the frame; the brake mechanisms are respectively and symmetrically arranged between the wheels at the two sides and the frame; the folding handrail mechanisms are respectively arranged at the left side and the right side of the top of the frame;

the scissor-fork type rising-assisting and sitting mechanism comprises a cushion frame, a first rising-sitting frame, a second rising-sitting frame, a third rising-sitting frame, a fourth rising-sitting frame, a fifth rising-sitting frame, a sixth rising-sitting frame, a seventh rising-sitting frame, an eighth rising-sitting frame, a bearing B, a hydraulic cylinder barrel, a hydraulic cylinder piston rod, a connecting rod, an electric control bolt and an electric control bolt core; the fifth sitting-up frame is hinged between the left side and the right side of the middle bottom of the cushion frame; the sixth sitting-up frame is hinged between the left side and the right side of the bottom of the rear end of the cushion frame; the first sitting frame, the second sitting frame, the third sitting frame, the fourth sitting frame and the eighth sitting frame are respectively and symmetrically arranged at the left side and the right side of the bottom of the cushion frame; the lower end of the first sitting-up frame is hinged with the frame, the upper end of the first sitting-up frame is hinged with the front end of the fourth sitting-up frame, and the middle part of the first sitting-up frame is hinged with the middle part of the second sitting-up frame; the lower end of the second sitting-up frame is hinged with the bearing B, and the upper end of the second sitting-up frame is hinged with the rear end of the third sitting-up frame; the front end of the third sitting-up frame is hinged with the middle part of the fourth sitting-up frame; the rear end of the fourth sitting-up frame is hinged with one end of the sixth sitting-up frame; one end of the fifth sitting-up frame is hinged with the middle part of the fourth sitting-up frame and the front end of the third sitting-up frame respectively, and the other end of the fifth sitting-up frame is symmetrical relative to the frame; one end of the sixth sitting-up frame is hinged with the rear end of the fourth sitting-up frame and the rear side of the bottom of the cushion frame respectively, and the other end of the sixth sitting-up frame is symmetrical relative to the frame; two ends of the seventh sitting up frame are respectively hinged with the middle parts of the first sitting up frame and the second sitting up frame at two sides; the rear end of the eighth sitting-up frame is fixedly connected with the front end of the third sitting-up frame; the bearings B are respectively hinged at the lower end of the second sitting frame and can roll in bearing grooves on two sides of the front part of the frame; the lower end of the hydraulic cylinder barrel is hinged with a rod on the rear side of the frame respectively; the hydraulic piston rod is respectively connected with the inner cavity wall of the hydraulic cylinder barrel in a sliding manner, and the upper end of the hydraulic piston rod is hinged with the seventh sitting frame; the connecting rods are in sliding connection with holes at the front end and the rear end of the cushion frame and are symmetrical about the frame; the electric control bolts are respectively fixedly connected with the holes on the cushion frame through the holes on the bottom flange of the electric control bolts, and are pairwise symmetrical about the frame; the electric control bolt core is arranged inside the electric control bolt and hinged with the hole on the side surface of the cushion frame.

Further, the backrest mechanism comprises an external backrest frame, an internal backrest frame, a foot rest, a controllable gas spring control gate, a controllable gas spring pressure cylinder, a controllable gas spring piston rod, a controllable gas spring valve port connector, a controllable gas spring valve, a pipe clamp sleeve, a pipe clamp cam rod, a controllable gas spring connector and a pipe clamp cam ejector rod; the two sides of the bottom of the front end of the external backrest frame are respectively hinged with the two sides of the rear end of the frame, the controllable gas spring pressure cylinders are symmetrically arranged between the external backrest frame and the left and right ends of the rear side of the frame, the upper ends of the controllable gas spring pressure cylinders are hinged with the external backrest frame through controllable gas spring joints, and the inner cavity wall of each controllable gas spring pressure cylinder is in sliding connection with a controllable gas spring piston rod; the built-in backrest frame is arranged in the middle of the built-in backrest frame, two sides of the built-in backrest frame are respectively hinged with boss holes in the built-in backrest frame, and the upper end and the lower end of the outer side of the back surface of the built-in backrest frame are symmetrically provided with electric control bolts; the front end of the foot stand is symmetrically provided with two rods, the back of the built-in backrest frame is provided with two pipes corresponding to the two rods respectively, and the two rods at the front end of the foot stand are connected with the two pipes at the back of the built-in backrest frame in an inserting manner respectively; the front end of the cushion frame is provided with a pipe orifice corresponding to the two rods at the front end of the foot rest; the controllable gas spring control gates are respectively and fixedly connected to the grab bars on the two sides of the back of the external backrest frame; the valve port joint of the controllable gas spring is hinged on a rod piece at the bottom of the rear side of the frame and is connected with the lower end of a piston rod of the controllable gas spring; the controllable gas spring valve is hinged on the controllable gas spring joint; the pipe clamp sleeve penetrates through two pipe orifices below the built-in backrest frame, and the two pipe orifices below the built-in backrest frame respectively correspond to the connecting rods; the pipe clamp cam rod is hinged on the pipe clamp sleeve; and two protrusions on the pipe clamp cam mandril penetrate through two holes on the pipe clamp sleeve to form sliding connection.

Further, the pedal mechanism comprises a pedal plate, a foot support, a leg pad, a movable support pipe clamp and a movable support pipe clamp screw rod: the foot supports are symmetrically arranged on the left side and the right side of the upper part of the front end of the frame respectively, and the upper ends of the foot supports are hinged with the frame; the pedals are respectively and symmetrically arranged on the inner sides of the lower ends of the two side foot supports; the leg protection pads are symmetrically connected to the inner sides of the middle parts of the two side foot supports through threaded rods; a transverse threaded rod at the front end of the movable support penetrates through the upper part of the foot support, and a longitudinal extension rod at the rear end penetrates through the movable support pipe clamp to form sliding connection; the movable bracket pipe clamp clamps the movable bracket, and the movable bracket pipe clamp penetrates through a hole in the middle of a front side rod of the frame; the movable bracket pipe clamp screw penetrates through the movable bracket pipe clamp; the angle of the foot support is changed by controlling the length of the movable support extending out of the movable support pipe clamp, so that the position of the leg of the user is adjusted, and the foot support for placing the leg is fixed at any angle.

Furthermore, the folding handrail mechanism comprises a controller, a handrail guard plate, a handrail frame, an insertion pin shell A, a handrail support spring, an insertion pin A, an insertion pin shell B, a handrail support, a folding button, an insertion pin B, a bolt A, a nut A and a handrail mechanism connecting piece; the controller is fixedly connected to the handrail guard plate and used for controlling the driving system and the electric control bolt and switching the rising-assisting mode; the handrail guard plate is fixedly connected to the handrail frame; the armrest supports are respectively arranged at the bottoms of the front end and the rear end of the armrest frame, and the upper ends of the armrest supports are respectively hinged with the bottoms of the front end and the rear end of the armrest frame; the plug pin shell A penetrates through the handrail support and is fixedly connected with the handrail frame; the plug pin A penetrates through the plug pin shell A, and one end of the plug pin A is hinged with the folding button; the handrail support spring is arranged in a pipeline of the plug pin shell A and is used for propping against the plug pin A; the plug pin shell B penetrates through the handrail support and is fixedly connected with the handrail support; one end of the handrail support is hinged on the handrail frame, and the other end of the handrail support is hinged on the outer side of the upper part of the frame; one end of the folding button is hinged with the plug pin shell A, and the middle part of the folding button is hinged with the plug pin A; the plug pins B respectively penetrate through holes at the rear end of the armrest frame and holes on the armrest mechanism connecting piece; the bolt A and the nut A form a bolt connection, and the handrail mechanism connecting piece is connected to the outer side of the external backrest frame; one end of the armrest mechanism connecting piece is hinged on the armrest frame, and the other end of the armrest mechanism connecting piece is connected on the external backrest frame; when the folding button is lifted, the folding button drives the plug pin A to lift, so that the folding handrail mechanism is unlocked; when the folding button is released, the plug pin A can be popped out under the action of the handrail support spring, so that the folding handrail mechanism is locked.

Furthermore, the brake mechanism comprises a brake pad, a brake lever, a brake spring, a brake fixing piece and a rolling line; the brake pad is fixedly connected to the transverse rod piece at the front end of the brake lever; the middle part of the brake lever is hinged with the rear side of the lower part of the frame; the brake spring penetrates through the rolling line and is arranged between the rear end of the brake lever and the brake fixing piece to play a role in resetting; the brake fixing sheet is fixedly connected to the upper part of the rear side of the frame; one end of the rolling line penetrates through the brake spring to be connected with the brake lever, and the other end of the rolling line is connected with the controllable gas spring control brake.

Furthermore, the driving system comprises a direct current motor A, a gear pump, an oil tank, an overflow valve, a reversing valve, a battery, a direct current motor B, a key, a transmission shaft, a shaft end retainer ring and an oil tank connecting piece; the direct current motor A is used for driving a gear pump and converting electric energy into mechanical energy; the gear pump, the oil tank, the overflow valve and the reversing valve form a hydraulic system of the scissor type lifting mechanism and are arranged on a bottom plate inside the frame; the gear pump is connected with the through hole of the frame by a bolt penetrating through the through hole of the gear pump; the oil tank is connected with the through hole on the oil tank connecting piece by a bolt penetrating through the through hole on the oil tank; the oil tank connecting piece penetrates through the frame and is welded on the rear cross rod; the overflow valve is connected with the through hole on the frame by a bolt penetrating through the through hole at the bottom of the overflow valve; the reversing valve is connected with a through hole on the frame by penetrating through the through hole at the bottom of the reversing valve by using a bolt; the direct current motor drives the gear pump to absorb oil from the oil tank and supply high-pressure oil to the oil circuit, the gear pump outputs high-pressure oil to flow into a rodless cavity of the hydraulic cylinder barrel through the reversing valve, the high-pressure oil pushes a piston rod of the hydraulic cylinder to move, oil in a rod cavity of the hydraulic cylinder flows back to the oil tank through an oil return circuit, and the overflow valve is connected with the gear pump in parallel to play a role of a safety valve and protect the oil circuit; the battery is arranged on the frame bottom plate and provides power for the direct current motor B and the controller; the direct current motors B are respectively arranged on the motor supporting frames on two sides of the bottom of the rear end of the frame and are used for driving wheels to move; the wheel is connected with the transmission shaft through a key, the transmission shaft is connected with the output end of the direct current motor B, and the shaft end retainer ring is arranged between the connection part of the wheel and the transmission shaft.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention can simultaneously realize two lifting modes of inclined standing assistance and horizontal lifting;

2. the standing-assisting structure adopts a scissor-fork type lifting mechanism to assist in standing;

3. the conversion of different lifting forms can be realized by changing the connection mode of the cushion frame and the scissor-fork type lifting mechanism and the connection mode of the backrest mechanism and the vehicle body mechanism;

4. the lifting mechanism is driven by the hydraulic system to be safer and more reliable, and compared with an electrically driven wheelchair, the weight of the wheelchair is reduced because the hydraulic drive power-weight ratio is large.

Drawings

FIG. 1 is a schematic view of the overall structure of a multi-functional standing-up assisted wheelchair according to the present invention;

FIG. 2 is an exploded view of the body mechanism;

FIG. 3 is a schematic structural view of a scissor-type sit-up assist mechanism;

FIG. 4 is a rear side schematic view of FIG. 3;

FIG. 5 is a schematic structural view of the pipe clamping mechanism;

FIG. 6 is a schematic structural view of the backrest mechanism;

FIG. 7 is a schematic view of the connection between the rolling line and the controllable gas spring control gate;

FIG. 8 is a schematic structural view of the footrest mechanism;

FIG. 9 is a schematic structural view of the brake mechanism;

FIG. 10 is a schematic structural view of the folding armrest mechanism;

FIG. 11 is a schematic top view of the drive system;

FIG. 12 is a schematic view of the construction of the drive system;

FIG. 13 is a schematic structural view of the form of the elevating bed of the present invention;

FIG. 14 is a schematic structural view of a scissor-type sit-up assist mechanism in the form of a lift bed according to the present invention;

fig. 15 is a rear side structural view of fig. 14.

Wherein, the reference numbers: 1. a vehicle body mechanism; 2. a scissor-fork type rising and sitting assisting mechanism; 3. a backrest mechanism; 4. a pedal mechanism; 5. a brake mechanism; 6. a folding armrest mechanism; 7. a drive system; 101. a frame; 102. a wheel; 103. an auxiliary wheel support; 104. an auxiliary wheel; 105. a guide wheel bracket; 106. a guide wheel; 107. a wheel end cover; 108. a bearing A; 109. an auxiliary support bar; 201. a cushion frame; 202. a first sitting frame; 203. a second sitting-up frame; 204. a third sitting-up frame; 205. a fourth sitting-up frame; 206. a fifth sitting-up frame; 207. a sixth sitting-up frame; 208. a seventh sitting-up frame; 209. an eighth sitting-up frame; 210. a bearing B; 211. a hydraulic cylinder; 212. a hydraulic cylinder piston rod; 213. a connecting rod; 214. an electric control bolt; 215. an electrically controlled latch core; 216. a nut B; 217. a bolt B; 218. a pipe orifice; 301. an external backrest frame; 302. a backrest frame is arranged inside; 303. a foot rest; 304. a controllable gas spring control gate; 305. a controllable gas spring pressure cylinder; 306. a controllable gas spring piston rod; 307. a controllable gas spring valve port connector; 308. a controllable gas spring valve; 309. a pipe jacket; 310. a pipe clamp cam lever; 311. a controllable gas spring joint; 312. a pipe clamp cam mandril; 313. a grab rail; 314. a rod; 315. a tube; 401. a foot pedal; 402. a foot support; 403. leg pads; 404. a movable support; 405. a movable bracket pipe clamp; 406. the movable bracket is clamped by a screw rod; 501. a brake pad; 502. a brake lever; 503. a brake spring; 504. a brake fixing piece; 505. rolling; 601. a controller; 602. a handrail guard plate; 603. a handrail frame; 604. a plug pin housing A; 605. an armrest support spring; 606. inserting and pulling a pin A; 607. a plug pin housing B; 608. a handrail support; 609. a folding button; 610. inserting and pulling a pin B; 611. a bolt A; 612. a nut A; 613. a handrail mechanism connecting member; 701. a direct current motor A; 702. a gear pump; 703. an oil tank; 704. an overflow valve; 705. a diverter valve; 706. a battery; 707. a direct current motor B; 708. a key; 709. a drive shaft; 710. a shaft end retainer ring; 711. an oil tank connecting piece.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

It should be noted that in the description of the present invention, it should be noted that the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, but do not mean that a device or an element must have a specific orientation, be configured in a specific orientation, and be operated.

As shown in figure 1, the multifunctional standing-up assisting wheelchair provided by the invention comprises a body mechanism 1, a scissor type standing-up assisting mechanism 2, a backrest mechanism 3, a pedal mechanism 4, a brake mechanism 5, a folding armrest mechanism 6 and a driving system 7.

The vehicle body mechanism comprises a vehicle frame 101, a wheel 102, an auxiliary wheel bracket 103, an auxiliary wheel 104, a guide wheel bracket 105, a guide wheel 106, a wheel end cover 107 and a bearing A108; the wheels 102 are symmetrically connected to two sides of the rear side of the frame 101 through a transmission shaft 709 and a bearing A108 respectively, and are used for driving the wheelchair to run and realizing steering by controlling the speed difference of two wheels; the bearing A108 is hinged with a corresponding bearing support hole on the frame 101; the auxiliary wheel bracket 103 is respectively and fixedly connected with two auxiliary support rods 109 at the rear side of the frame 101, and the auxiliary wheel 104 is hinged with the auxiliary wheel bracket 103 and used for increasing the support area of the wheelchair, so that the wheelchair is overturned due to the shift of the center of gravity in the assisting process; the guide wheel brackets 105 are respectively symmetrically arranged at the bottoms of the two ends of the front side of the frame 101 and hinged with the bottom of the front side of the frame 101; the guide wheels 106 are respectively hinged with the guide wheel brackets 105, so that flexible steering is realized; the wheel end cover 107 is fixedly connected with the end cover groove on the wheel 102.

The driving system 7 is arranged above a bottom plate in the frame 101 and is in transmission connection with the wheels 102, the scissor-fork type sitting-assisting mechanism 2 and the folding handrail mechanism 6 respectively; the scissor-fork type rising-assisting and sitting mechanism 2 is arranged between the left side and the right side of the interior of the frame 101, the bottom of the front end of the scissor-fork type rising-assisting and sitting mechanism is connected with the frame 101 in a sliding manner, and the bottom of the rear end of the scissor-fork type rising-assisting and sitting mechanism is hinged with the frame 101; the backrest mechanism 3 is arranged at the rear side of the frame 101; the pedal mechanism 4 is arranged at the bottom of the front side of the frame 101; the brake mechanisms 5 are respectively and symmetrically arranged between the wheels 102 and the frame 101 on the two sides; the folding handrail mechanisms 6 are respectively arranged at the left side and the right side of the top of the frame 101.

The scissor-fork type rising-assisting and sitting mechanism 2 comprises a cushion frame 201, a first rising-sitting frame 202, a second rising-sitting frame 203, a third rising-sitting frame 204, a fourth rising-sitting frame 205, a fifth rising-sitting frame 206, a sixth rising-sitting frame 207, a seventh rising-sitting frame 208, an eighth rising-sitting frame 209, a bearing B210, a hydraulic cylinder 211, a hydraulic cylinder piston rod 212, a connecting rod 213, an electric control bolt 214 and an electric control bolt core 215; the cushion is fixedly arranged above the cushion frame 201; the fifth sitting-up frame 206 is hinged between the left side and the right side of the bottom of the cushion frame 201; the sixth sitting-up frame 207 is hinged between the left side and the right side of the bottom of the rear end of the cushion frame 201; the first sitting up frame 202, the second sitting up frame 203, the third sitting up frame 204, the fourth sitting up frame 205 and the eighth sitting up frame 209 are respectively and symmetrically arranged at the left side and the right side of the bottom of the seat cushion frame 201; the hole at the lower end of the first sitting up frame 202 is hinged with the frame 101, the hole at the upper end is hinged with the hole at the front end of the fourth sitting up frame 205, and the middle hole of the first sitting up frame 202 is hinged with the middle hole of the second sitting up frame 203; the hole at the lower end of the second rising and seating frame 203 is hinged with a bearing B210, and the upper end of the second rising and seating frame is hinged with the rear end of the third rising and seating frame 204; the front end of the third sitting-up frame 204 is hinged with the middle hole of the fourth sitting-up frame 205; a hole at the rear end of the fourth sitting-up frame 205 is hinged with one end of a sixth sitting-up frame 207; one end of the fifth sitting up frame 206 is hinged with the middle hole of the fourth sitting up frame 205 and the hole at the front end of the third sitting up frame 204 respectively, and the other end is symmetrical about the frame 101; a hole at one end of the sixth sitting-up frame 207 is hinged with a hole at the rear end of the fourth sitting-up frame 205 and a hole at the rear side of the bottom of the seat cushion frame 101, and the other end of the sixth sitting-up frame is symmetrical relative to the frame 101; the two ends of the seventh sitting up frame 208 are hinged with the hole in the middle of the first sitting up frame 202 and the hole in the middle of the second sitting up frame 203 at the two sides respectively; the rear end of the eighth sitting up frame 209 is fixedly connected with the hole at the front end of the third sitting up frame 204; the bearings B210 are respectively hinged at the lower end of the second sitting frame 203 and can roll in bearing grooves at two sides of the front part of the frame 101; in this embodiment, two hydraulic cylinder barrels 211 are arranged at a certain distance, and the lower ends of the hydraulic cylinder barrels 211 are hinged to a rod on the rear side of the frame 101; the hydraulic piston rods 212 are respectively connected with the inner cavity wall of the hydraulic cylinder 211 in a sliding manner, and the upper ends of the hydraulic piston rods 212 are hinged with the seventh sitting frame 208; the connecting rod 213 is connected with the holes at the front end and the rear end of the cushion frame 201 in a sliding way and is symmetrical about the frame 101; two pipe orifices 218 are symmetrically arranged on two sides of the middle part of the front end of the cushion frame 201, and the pipe orifices 218 correspond to the connecting rod 213; four electric control bolts 214 are arranged, are respectively fixedly connected with holes on the cushion frame 201 through holes on a flange at the bottom of the electric control bolts, and are symmetrical in pairs relative to the frame 101; the electric control bolt core 215 is arranged inside the electric control bolt 214 and hinged with a hole on the side surface of the seat cushion frame 201.

The first sitting up frame 202, the second sitting up frame 203, the third sitting up frame 204, the fourth sitting up frame 205, the fifth sitting up frame 206, the sixth sitting up frame 207, the seventh sitting up frame 208 and the eighth sitting up frame 209 together form a scissor type lifting mechanism which is symmetrical about the frame 101; when the hydraulic cylinder piston rod 212 pushes the seventh rising frame 208, the bearings B210 roll in the bearing grooves on the two sides of the front part of the frame 101 respectively, the scissors mechanism rises, and the cushion frame 201 is connected to the fourth rising frame 205, so that the vertical upward movement and the forward tilting process are realized during the rising process, and the inclined rising-assisted form is realized.

The backrest mechanism 3 comprises an external backrest frame 301, an internal backrest frame 302, a foot rest 303, a controllable gas spring control gate 304, a controllable gas spring pressure cylinder 305, a controllable gas spring piston rod 306, a controllable gas spring valve port joint 307, a controllable gas spring valve 308, a pipe clamp sleeve 309, a pipe clamp cam rod 310, a controllable gas spring joint 311 and a pipe clamp cam ejector rod 312.

The backrest cushion is fixedly arranged on the front end face of the external backrest frame 301; holes on two sides of the bottom of the front end of the external backrest frame 301 are correspondingly hinged with holes on two sides of the rear end of the frame 101, the controllable gas spring pressure cylinders 305 are symmetrically arranged between the left end and the right end of the rear side of the external backrest frame 301 and the frame 101, the upper ends of the controllable gas spring pressure cylinders 305 are hinged with the bottom of the rear side of the external backrest frame 301 through controllable gas spring joints 311, and the inner cavity wall of each controllable gas spring pressure cylinder 305 is in sliding connection with a controllable gas spring piston rod 306; the internal backrest frame 302 is arranged in the middle of the external backrest frame 301, and two sides of the internal backrest frame 302 are respectively hinged with boss holes in the external backrest frame 301; the front end of the foot stand 303 is detachably connected with a pipe 314 corresponding to the back of the built-in backrest frame 302 in an inserting way through two rods 313, and the rod 314 and the pipe 315 respectively correspond to the pipe orifice 218 and the connecting rod 213; the controllable gas spring control gates 304 are respectively and fixedly connected to the grab bars 313 on the two sides of the back surface of the external backrest frame 301; the valve port joint 307 of the controllable gas spring is hinged on a rod at the bottom of the rear side of the frame 101 and is connected with the lower end of a piston rod 306 of the controllable gas spring; the controllable gas spring valve 308 is hinged on the controllable gas spring valve port joint 307; the pipe clamp sleeve 309 penetrates through two pipe orifices below the built-in backrest frame 302, and the two pipe orifices below the built-in backrest frame 302 respectively correspond to the connecting rods 213; the pipe clamp cam lever 310 is hinged on the pipe clamp sleeve 309; the two protrusions on the tube clamp cam follower 312 pass through two holes on the tube clamp sleeve 309 to form a sliding connection.

The pedal mechanism 4 comprises a pedal plate 401, a foot bracket 402, a leg pad 403, a movable bracket 404, a movable bracket pipe clamp 405 and a movable bracket pipe clamp screw 406; the foot supports 402 are respectively symmetrically arranged at the left side and the right side of the upper part of the front end of the frame 101, and the upper ends of the foot supports are hinged with the frame 101; the pedal plates 401 are respectively and symmetrically arranged on the inner sides of the lower ends of the two side foot supports 402; the leg protection pads 403 are symmetrically connected to the inner sides of the middle parts of the two side foot brackets 402 through threaded rods; a transverse threaded rod at the front end of the movable support 404 penetrates through the upper part of the foot support 402, and a longitudinal extension rod at the rear end penetrates through a movable support pipe clamp 405 to form sliding connection; the movable bracket pipe clamp 405 clamps the movable bracket 404, and the movable bracket pipe clamp 405 penetrates through a hole in the middle of a front side rod of the frame 101; the movable bracket pipe clamp screw 406 passes through the movable bracket pipe clamp 405; the angle of the foot support 402 is changed by controlling the length of the movable support 404 extending out of the movable support pipe clamp 405, so that the position for placing the leg of the user is adjusted, and the foot support 402 for placing the leg can be fixed at any angle.

The brake mechanism 5 comprises a brake pad 501, a brake lever 502, a brake spring 503, a brake fixing plate 504 and a rolling line 505; the brake pad 501 is fixedly connected to a transverse rod at the front end of the brake lever 502; the middle part of the brake lever 502 is hinged with the rear side of the lower part of the frame 101; the brake spring 503 passes through the rolling line and is arranged between the rear end of the brake lever 502 and the brake fixing plate 504 to play a role of resetting; the brake fixing plate 504 is fixedly connected to the upper portion of the rear side of the frame 101. One end of the rolling line 505 passes through the controllable gas spring control brake 304, and the other end of the rolling line passes through the brake spring 503 and is connected to one end of the brake lever 502, when the controllable gas spring control brake 304 is clamped, the rolling line 505 drives the brake lever 502 to rotate, so that the brake pad 501 and the wheel 102 are braked by friction.

The folding armrest mechanism 6 comprises a controller 601, an armrest guard plate 602, an armrest frame 603, an insertion pin housing A604, an armrest support spring 605, an insertion pin A606, an insertion pin housing B607, an armrest support 608, a folding button 609, an insertion pin B610, a bolt A611, a nut A612 and an armrest mechanism connecting piece 613; the controller 601 is fixedly connected to the handrail guard plate 602 and is used for controlling the driving system 7 and the electric control bolt 214 to switch the rising-assisting mode; the armrest guard plate 602 is fixedly connected to the armrest frame 603; the armrest supports 608 are respectively arranged at the bottoms of the front end and the rear end of the armrest frame 603, and the upper ends of the armrest supports are respectively hinged with the bottoms of the front end and the rear end of the armrest frame 603; the plug pin housing A604 penetrates through the handrail support 608 and is fixedly connected with the handrail frame 603; the plug pin A606 penetrates through the plug pin housing A604, and one end of the plug pin A is hinged with the folding button 609; the armrest support spring 605 is mounted in the duct of the plug pin housing a604 for abutting against the plug pin a 606; the plug pin housing B607 penetrates through the armrest support 608 and is fixedly connected with the armrest support 608; one end of the handrail support 608 is hinged on the handrail frame 603, and the other end is hinged on the outer side of the upper part of the frame 101; one end of the folding button 609 is hinged with the plug pin shell A604, and the middle part of the folding button is hinged with the plug pin A606; the plug pins B610 respectively pass through holes at the rear ends of the handrail frames 603 and holes on the handrail mechanism connecting piece 613; the bolt A611 and the nut A612 form a bolt connection, and the armrest mechanism connecting piece 613 is connected to the outer side of the lower part of the external backrest frame 301; one end of the armrest mechanism connecting piece 613 is hinged on the armrest frame 603, and the other end is connected on the external backrest frame 301; when the folding button 609 is lifted, the folding button 609 drives the plug pin a606 to be lifted, thereby unlocking the folding handrail mechanism 6; when the fold button 609 is released, the plug pin a606 springs out under the action of the arm support spring 605, thereby locking the folded arm mechanism 6.

The driving system 7 comprises a direct current motor A701, a gear pump 702, an oil tank 703, an overflow valve 704, a reversing valve 705, a battery 706, a direct current motor B707, a key 708, a transmission shaft 709, a shaft end retainer 710 and an oil tank connecting piece 711; the direct current motor A701 is used for driving a gear pump 702 to convert electric energy into mechanical energy; the gear pump 702, the oil tank 703, the overflow valve 704 and the reversing valve 705 form a hydraulic system of the scissor-type lifting mechanism and are arranged on a bottom plate inside the frame 101; the gear pump 702 is connected with the through hole of the frame 101 by a bolt passing through the through hole of the gear pump 702; the oil tank 703 is connected with the through hole of the oil tank connector 711 by passing through the through hole of the oil tank 703 by a bolt; the oil tank connecting piece 711 penetrates through and is welded on a cross bar at the rear side of the frame 101; the overflow valve 704 is connected with a through hole on the frame 101 by a bolt penetrating through the through hole at the bottom of the overflow valve 704; the reversing valve 705 is connected with a through hole in the frame 101 by a bolt penetrating through the through hole in the bottom of the reversing valve 705; the direct current motor A701 drives the gear pump 702 to suck oil from the oil tank 703 and supply high-pressure oil to an oil path, the gear pump 702 outputs high-pressure oil to flow to a rodless cavity of the hydraulic cylinder barrel 211 through the reversing valve 705, the high-pressure oil pushes the piston rod 212 of the hydraulic cylinder to move, oil in a rod cavity of the hydraulic cylinder flows back to the oil tank 703 through an oil return path, the overflow valve 704 is connected with the gear pump 702 in parallel, the effect of a safety valve is achieved, and the safety of the oil path is protected; the battery 706 is arranged on the bottom plate of the frame 101 and provides power for the direct current motor B707 and the controller 601; the direct current motors B707 are respectively arranged on the motor supporting frames at two sides of the bottom of the rear end of the frame 101 and are used for driving the wheels 102 to move; the wheel 102 is connected with a transmission shaft 709 through a key 708, the transmission shaft 709 is connected with the output end of a direct current motor B707, and the shaft end retainer 710 is installed between the connection part of the wheel 102 and the transmission shaft 709; the tank connector 711 is used to fix the tank 703 to the vehicle frame.

The direct current motor A701 drives the gear pump 702 to absorb oil from the oil tank 703 and output high-pressure oil, the high-pressure oil is supplied to the lower cavity of the hydraulic cylinder 211 after passing through the reversing valve, the high-pressure oil pushes the hydraulic piston rod 212 to extend out, and the hydraulic piston rod 212 pushes the seventh rising frame 208, so that the scissor-fork type rising-assisting mechanism is driven to assist in rising.

When the connection mode between the cushion frame 201 and the rising frame is changed, the rising mode can be changed; firstly, the cushion frame 201 is retracted and leveled by controlling the elongation of a piston rod 212 of a hydraulic cylinder, then the foot stool 303 is taken down from the built-in backrest frame 302 and inserted into two pipe orifices arranged in front of the cushion frame 201, and the foot stool 303 is fastened at the joint of the cushion frame 201 through a pipe clamp mechanism; then, the backrest mechanism 3 is enabled to be flat by controlling the elongation of the controllable gas spring, and then the two connecting rods 213 below the cushion frame 201 penetrate into the two pipe orifices at the bottom of the built-in backrest frame 302 and are fastened by the pipe clamp mechanism; the controller 601 is used for controlling the retraction of the electric control bolt 214 below the cushion frame 201 and the electric control bolt 214 at the back of the built-in backrest frame 302, the bolt B217 is inserted into the notch at the front end of the cushion frame 201 and is fastened by the nut B216, so that the bolt B217 and the notch form sliding connection, the connection mode of the cushion frame 201 and the built-in backrest frame 302 is further changed, at the moment, the cushion frame 201 drives the built-in backrest frame 302 and the foot stool 303 to realize vertical lifting through the connecting rod 213, and the inclined lifting is changed into a lifting bed only capable of vertical lifting.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims

1. A multifunctional standing-up assisting wheelchair is characterized in that: the wheelchair comprises a body mechanism, a scissor-fork type rising and sitting assisting mechanism, a backrest mechanism, a pedal mechanism, a brake mechanism, a folding handrail mechanism and a driving system;

2. The multifunctional standing-up assisting wheelchair as claimed in claim 1, wherein: the backrest mechanism comprises an external backrest frame, an internal backrest frame, a foot rest, a controllable gas spring control gate, a controllable gas spring pressure cylinder, a controllable gas spring piston rod, a controllable gas spring valve port connector, a controllable gas spring valve, a pipe clamp sleeve, a pipe clamp cam rod, a controllable gas spring connector and a pipe clamp cam ejector rod; the two sides of the bottom of the front end of the external backrest frame are respectively hinged with the two sides of the rear end of the frame, the controllable gas spring pressure cylinders are symmetrically arranged between the external backrest frame and the left and right ends of the rear side of the frame, the upper ends of the controllable gas spring pressure cylinders are hinged with the external backrest frame through controllable gas spring joints, and the inner cavity wall of each controllable gas spring pressure cylinder is in sliding connection with a controllable gas spring piston rod; the built-in backrest frame is arranged in the middle of the built-in backrest frame, two sides of the built-in backrest frame are respectively hinged with boss holes in the built-in backrest frame, and the upper end and the lower end of the outer side of the back surface of the built-in backrest frame are symmetrically provided with electric control bolts; the front end of the foot stand is symmetrically provided with two rods, the back of the built-in backrest frame is provided with two pipes corresponding to the two rods respectively, and the two rods at the front end of the foot stand are connected with the two pipes at the back of the built-in backrest frame in an inserting manner respectively; the front end of the cushion frame is provided with a pipe orifice corresponding to the two rods at the front end of the foot rest; the controllable gas spring control gates are respectively and fixedly connected to the grab bars on the two sides of the back of the external backrest frame; the valve port joint of the controllable gas spring is hinged on a rod piece at the bottom of the rear side of the frame and is connected with the lower end of a piston rod of the controllable gas spring; the controllable gas spring valve is hinged on the controllable gas spring joint; the pipe clamp sleeve penetrates through two pipe orifices below the built-in backrest frame, and the two pipe orifices below the built-in backrest frame respectively correspond to the connecting rods; the pipe clamp cam rod is hinged on the pipe clamp sleeve; and two protrusions on the pipe clamp cam mandril penetrate through two holes on the pipe clamp sleeve to form sliding connection.

3. The multifunctional standing-up assisting wheelchair as claimed in claim 1, wherein: the pedal mechanism comprises a pedal plate, a foot support, a leg protection pad, a movable support pipe clamp and a movable support pipe clamp screw rod: the foot supports are symmetrically arranged on the left side and the right side of the upper part of the front end of the frame respectively, and the upper ends of the foot supports are hinged with the frame; the pedals are respectively and symmetrically arranged on the inner sides of the lower ends of the two side foot supports; the leg protection pads are symmetrically connected to the inner sides of the middle parts of the two side foot supports through threaded rods; a transverse threaded rod at the front end of the movable support penetrates through the upper part of the foot support, and a longitudinal extension rod at the rear end penetrates through the movable support pipe clamp to form sliding connection; the movable bracket pipe clamp clamps the movable bracket, and the movable bracket pipe clamp penetrates through a hole in the middle of a front side rod of the frame; the movable bracket pipe clamp screw penetrates through the movable bracket pipe clamp; the angle of the foot support is changed by controlling the length of the movable support extending out of the movable support pipe clamp, so that the position of the leg of the user is adjusted, and the foot support for placing the leg is fixed at any angle.

4. The multifunctional standing-up assisting wheelchair as claimed in claim 2, wherein: the folding handrail mechanism comprises a controller, a handrail guard plate, a handrail frame, an insertion pin shell A, a handrail support spring, an insertion pin A, an insertion pin shell B, a handrail support, a folding button, an insertion pin B, a bolt A, a nut A and a handrail mechanism connecting piece; the controller is fixedly connected to the handrail guard plate and used for controlling the driving system and the electric control bolt and switching the rising-assisting mode; the handrail guard plate is fixedly connected to the handrail frame; the armrest supports are respectively arranged at the bottoms of the front end and the rear end of the armrest frame, and the upper ends of the armrest supports are respectively hinged with the bottoms of the front end and the rear end of the armrest frame; the plug pin shell A penetrates through the handrail support and is fixedly connected with the handrail frame; the plug pin A penetrates through the plug pin shell A, and one end of the plug pin A is hinged with the folding button; the handrail support spring is arranged in a pipeline of the plug pin shell A and is used for propping against the plug pin A; the plug pin shell B penetrates through the handrail support and is fixedly connected with the handrail support; one end of the handrail support is hinged on the handrail frame, and the other end of the handrail support is hinged on the outer side of the upper part of the frame; one end of the folding button is hinged with the plug pin shell A, and the middle part of the folding button is hinged with the plug pin A; the plug pins B respectively penetrate through holes at the rear end of the armrest frame and holes on the armrest mechanism connecting piece; the bolt A and the nut A form a bolt connection, and the handrail mechanism connecting piece is connected to the outer side of the external backrest frame; one end of the armrest mechanism connecting piece is hinged on the armrest frame, and the other end of the armrest mechanism connecting piece is connected on the external backrest frame; when the folding button is lifted, the folding button drives the plug pin A to lift, so that the folding handrail mechanism is unlocked; when the folding button is released, the plug pin A can be popped out under the action of the handrail support spring, so that the folding handrail mechanism is locked.

5. The multifunctional standing-up assisting wheelchair as claimed in claim 2, wherein: the brake mechanism comprises a brake pad, a brake lever, a brake spring, a brake fixing piece and a rolling line; the brake pad is fixedly connected to the transverse rod piece at the front end of the brake lever; the middle part of the brake lever is hinged with the rear side of the lower part of the frame; the brake spring penetrates through the rolling line and is arranged between the rear end of the brake lever and the brake fixing piece to play a role in resetting; the brake fixing sheet is fixedly connected to the upper part of the rear side of the frame; one end of the rolling line penetrates through the brake spring to be connected with the brake lever, and the other end of the rolling line is connected with the controllable gas spring control brake.

6. The multifunctional standing-up assisting wheelchair as claimed in claim 1, wherein: the driving system comprises a direct current motor A, a gear pump, an oil tank, an overflow valve, a reversing valve, a battery, a direct current motor B, a key, a transmission shaft, a shaft end retainer ring and an oil tank connecting piece; the direct current motor A is used for driving a gear pump and converting electric energy into mechanical energy; the gear pump, the oil tank, the overflow valve and the reversing valve form a hydraulic system of the scissor type lifting mechanism and are arranged on a bottom plate inside the frame; the gear pump is connected with the through hole of the frame by a bolt penetrating through the through hole of the gear pump; the oil tank is connected with the through hole on the oil tank connecting piece by a bolt penetrating through the through hole on the oil tank; the oil tank connecting piece penetrates through the frame and is welded on the rear cross rod; the overflow valve is connected with the through hole on the frame by a bolt penetrating through the through hole at the bottom of the overflow valve; the reversing valve is connected with a through hole on the frame by penetrating through the through hole at the bottom of the reversing valve by using a bolt; the direct current motor drives the gear pump to absorb oil from the oil tank and supply high-pressure oil to the oil circuit, the gear pump outputs high-pressure oil to flow into a rodless cavity of the hydraulic cylinder barrel through the reversing valve, the high-pressure oil pushes a piston rod of the hydraulic cylinder to move, oil in a rod cavity of the hydraulic cylinder flows back to the oil tank through an oil return circuit, and the overflow valve is connected with the gear pump in parallel to play a role of a safety valve and protect the oil circuit; the battery is arranged on the frame bottom plate and provides power for the direct current motor B and the controller; the direct current motors B are respectively arranged on the motor supporting frames on two sides of the bottom of the rear end of the frame and are used for driving wheels to move; the wheel is connected with the transmission shaft through a key, the transmission shaft is connected with the output end of the direct current motor B, and the shaft end retainer ring is arranged between the connection part of the wheel and the transmission shaft.