CN113143612B - Multi-connecting-rod folding electric wheelchair - Google Patents
Multi-connecting-rod folding electric wheelchair Download PDFInfo
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- CN113143612B CN113143612B CN202110465977.0A CN202110465977A CN113143612B CN 113143612 B CN113143612 B CN 113143612B CN 202110465977 A CN202110465977 A CN 202110465977A CN 113143612 B CN113143612 B CN 113143612B
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- 230000000712 assembly Effects 0.000 claims abstract description 4
- 238000000429 assembly Methods 0.000 claims abstract description 4
- 230000008093 supporting effect Effects 0.000 claims description 44
- 230000007246 mechanism Effects 0.000 claims description 38
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
- A61G5/0808—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction
- A61G5/085—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding up and down, e.g. reducing or expanding the overall height of the wheelchair
- A61G5/0858—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding up and down, e.g. reducing or expanding the overall height of the wheelchair comprising a scissor-type frame, e.g. having pivoting cross bars for enabling folding
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
- A61G5/0866—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable folding down backrest, e.g. where the backrest folds down onto the seat support
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
- A61G5/0883—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable having locking means for maintaining a folded or unfolded condition
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/1043—Cushions specially adapted for wheelchairs
- A61G5/1045—Cushions specially adapted for wheelchairs for the seat portion
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Rehabilitation Tools (AREA)
- Handcart (AREA)
Abstract
The multi-connecting-rod folding electric wheelchair comprises a scissor type lifting assembly, wherein an electric push rod for driving the scissor type lifting assembly to move in a telescopic mode is arranged in the scissor type lifting assembly; the front end of the bottom of the scissor type lifting assembly is rotationally connected with a pedal, the front end of the chassis assembly is connected with a front wheel assembly, the rear end of the chassis assembly is connected with a rear wheel assembly, and the pedal is positioned between the two front wheel assemblies; the top end of the scissor type lifting assembly is slidably connected with the seat assembly, the rear end of the seat assembly is rotationally connected with the backrest frame, the rear end of the seat assembly is provided with the locking assembly, the backrest frame and the locking assembly are assembled in a clamping way, and two sides of the backrest frame are symmetrically rotationally connected with armrests; according to the invention, the electric push rod can drive the opening and closing lifting of the scissor lifting assembly, so that the bottom of the wheelchair can be automatically folded; the armrests in the upper areas of the wheels can be rotated and retracted, and the backrest frame can be rotated and retracted to be in a horizontal state, so that the whole wheelchair is small in storage volume and convenient to operate.
Description
Technical Field
The invention belongs to the technical field of electric wheelchairs, and particularly relates to a multi-connecting-rod folding electric wheelchair.
Background
The electric wheelchair is mainly used for a wheelchair driven by electric power, is a transportation tool and an auxiliary tool for the purpose of riding instead of walking, can be folded without disassembling a battery, and is convenient to carry and store; however, the electric wheelchair in the current market cannot be folded, occupies a special space when being placed or parked, cannot be carried by vehicles and automobiles, and cannot travel.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a multi-connecting-rod folding electric wheelchair, which has the following specific technical scheme:
The multi-connecting-rod folding electric wheelchair comprises a scissor type lifting assembly, wherein an electric push rod for driving the scissor type lifting assembly to move in a telescopic mode is arranged in the scissor type lifting assembly; the front end of the bottom of the scissor type lifting assembly is rotationally connected with a pedal, the rear end of the bottom of the scissor type lifting assembly is slidably assembled in the chassis assembly, the front end of the chassis assembly is connected with a front wheel assembly, the rear end of the chassis assembly is connected with a rear wheel assembly, and the pedal is positioned between the two front wheel assemblies;
The top end sliding connection seat subassembly of scissors lifting unit, the back frame is rotated to seat subassembly's rear end, seat subassembly's rear end is equipped with locking subassembly, block assembly between back frame and the locking subassembly, the bilateral symmetry rotation of back frame is connected with the handrail.
Further, cut formula lifting assembly and including cutting formula lifting frame and electric putter, the back both ends symmetry of running-board is equipped with the side connecting rod, two the middle part of side connecting rod is run through there is the pillar, the tip fixed connection chassis subassembly of pillar, the outer wall middle part of pillar is equipped with the middle part connecting rod, the tip rotation of middle part connecting rod connects electric putter, the outer tip rotation of side connecting rod connects the bottom front end of cutting formula lifting frame, the bottom rear end sliding connection chassis subassembly of cutting formula lifting frame, electric putter's movable end rotates the bottom rear end of connecting cutting formula lifting frame.
Further, the seat assembly comprises a seat frame, reinforcing rods and sliding rails, wherein the sliding rails are arranged at the inner space of the seat frame, two sliding rails are symmetrically arranged below the seat frame and are fixedly connected with the seat frame through the reinforcing rods, and the top ends of the scissor-type lifting frames are embedded in the sliding rails in a sliding manner.
Further, the handrail is connected with the back frame in a damping rotation mode, a U-shaped clamping ring is arranged on the bottom surface of the back frame, the locking assembly comprises a first back locking mechanism, and the clamping ring is assembled with the first back locking mechanism in a clamping mode.
Further, a first torsion spring is arranged at the rotary connection part of the armrest and the backrest frame and is used for driving the armrest to automatically fold; a second torsion spring is arranged at the rotary connection part of the backrest frame and the seat frame and is used for driving the backrest frame to automatically retract; the locking assembly comprises a second backrest locking mechanism, the clamping ring is assembled with the second backrest locking mechanism in a clamping mode, the outer side wall of each sliding rail is connected with an armrest supporting mechanism, and the armrest supporting mechanism is used for supporting armrests in two states of unfolding and storage.
Further, handrail supporting mechanism includes backup pad and backstop subassembly, the backup pad is the L type, the outer wall of backup pad perpendicular fixed connection slide rail, the backup pad is located the outside of handrail, seat frame, the inner wall of backup pad is equipped with the baffle perpendicularly, the baffle is located the bottom of handrail, seat frame's top, the baffle is used for the handrail of backstop storage state, the top slip of backup pad runs through there is backstop subassembly, backstop subassembly arranges in the bottom surface of handrail.
Further, the second backrest locking mechanism comprises a second box body, a clamping assembly and an operating rod; the inside of second box body is equipped with the clamping component, the vertical card of snap ring is gone into in the clamping component, the vertical slidable mounting in top surface of second box body has the action bars, the action bars is used for promoting clamping component and snap ring separation.
Further, the second backrest locking mechanism further comprises a connecting rod assembly, one end of the connecting rod assembly is connected with the clamping assembly, the other end of the connecting rod assembly is connected with the stop assembly, and the connecting rod assembly is used for driving the stop assembly and the clamping assembly to lock or unlock synchronously.
Further, the stop component comprises a first box body, a stop lever, a right-angle inclined block, a first spring and a sliding block; the first box body is arranged on the outer wall of the supporting plate, a first chute is arranged on the outer wall of the first box body, a slide block is embedded in the first chute in a sliding way, a stop lever is penetrated in the slide block in a sliding way, a top block is fixed on the outer wall of the stop lever, a first spring is sleeved on the outer wall of the stop lever and arranged between the slide block and the top block, the top block and the first spring are arranged in the first box body, a right-angle inclined block is arranged on the inner side of the first box body, the hypotenuse and the kicking block slip laminating of right angle sloping block, the width of right angle sloping block from top to bottom increases gradually, the second spout of the relative distribution of first spout has been seted up to the inside of right angle sloping block, the backup pad has seted up the third spout relatively with the second spout, the one end slip of pin runs through the bottom that the tip of second spout, third spout stretches into the handrail, the other end of pin stretches out in the outer wall slip cover of first spout and overhanging part is equipped with the lantern ring, lantern ring fixed connection link assembly.
Further, the clamping assembly comprises a clamping plate, a movable column, a supporting tube and a second spring, wherein the second spring is embedded in the supporting tube, the movable column is slidably embedded in the top of the supporting tube, the clamping plate is symmetrically and rotatably connected to the top end of the movable column, the clamping plate clamps the positioning clamping ring, and the side wall of the top end of the movable column is fixedly connected with the operating rod.
The beneficial effects of the invention are as follows: the electric push rod can drive the opening and closing lifting of the scissor lifting assembly, so that the bottom of the wheelchair can be automatically folded; the armrests in the upper areas of the wheels can be rotated and retracted, and the backrest frame can be rotated and retracted to be in a horizontal state, so that the whole wheelchair is small in storage volume and convenient to operate.
Drawings
FIG. 1 is a schematic view showing the structure of a multi-link folding electric wheelchair of the present invention;
FIG. 2 shows a schematic view of the primary folding structure of the wheelchair of the present invention;
FIG. 3 shows a schematic view of a two-stage folding structure of the wheelchair of the present invention;
FIG. 4 is a schematic view of the semi-automatic stowing electric wheelchair of the present invention;
FIG. 5 shows a schematic cross-sectional elevation view of FIG. 4;
FIG. 6 shows an enlarged schematic view of the structure at A of FIG. 5;
FIG. 7 shows a schematic diagram of the right angle bevel block assembly of the present invention;
FIG. 8 is a schematic view of the connecting rod assembly of the present invention;
FIG. 9 shows a schematic view of a second back lock mechanism of the present invention;
FIG. 10 shows a schematic view of a first back locking mechanism of the present invention;
FIG. 11 is a schematic diagram of the control principle of the scissor lift assembly of the present invention;
The figure shows: 1. a chassis assembly; 11. a cross beam; 12. a longitudinal beam; 2. a scissor lift assembly; 21. a scissor type lifting frame; 22. an electric push rod; 3. a seat assembly; 31. a seat frame; 311. a positioning plate; 32. a reinforcing rod; 33. a slide rail; 4. a backrest frame; 41. a rotating plate; 42. a clasp; 5. an armrest; 6. a foot pedal; 61. a side link; 62. a middle connecting rod; 7. a first back locking mechanism; 8. a handrail supporting mechanism; 81. a support plate; 811. a baffle; 82. a stop assembly; 821. a first case; 822. a stop lever; 8221. a top block; 823. a right angle oblique block; 824. a first spring; 825. a slide block; 9. a second backrest locking mechanism; 91. a second case; 92. a connecting rod assembly; 921. a first link; 922. a second link; 923. a third link; 9231. a collar; 93. a clamping assembly; 931. a clamping plate; 932. a movable column; 933. a support tube; 934. a second spring; 94. and an operation lever.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, a multi-link folding electric wheelchair comprises a scissor lifting assembly 2, wherein an electric push rod 22 for driving the scissor lifting assembly 2 to move in a telescopic manner is arranged in the scissor lifting assembly; the front end of the bottom of the scissor type lifting assembly 2 is rotationally connected with a pedal 6, the rear end of the bottom of the scissor type lifting assembly 2 is slidably assembled in the chassis assembly 1, the front end of the chassis assembly 1 is connected with a front wheel assembly, the rear end of the chassis assembly 1 is connected with a rear wheel assembly, and the pedal 6 is positioned between the two front wheel assemblies; the electric push rod can drive the opening and closing lifting of the scissor lifting assembly, so that the bottom of the wheelchair can be automatically folded;
The top end of the scissor type lifting assembly 2 is slidably connected with the seat assembly 3, the rear end of the seat assembly 3 is rotatably connected with the backrest frame 4, the rear end of the seat assembly 3 is provided with a locking assembly, the backrest frame 4 and the locking assembly are assembled in a clamping way, and two sides of the backrest frame 4 are symmetrically and rotatably connected with armrests; the armrests in the upper areas of the wheels can be rotated and retracted, and the backrest frame can be rotated and retracted to be in a horizontal state, so that the whole wheelchair is small in storage volume and convenient to operate.
As shown in fig. 1, the scissor lifting assembly 2 includes a scissor lifting frame 21 and an electric push rod 22, two ends of the back of the foot rest 6 are symmetrically provided with side connecting rods 61, the middle parts of the two side connecting rods 61 are penetrated with a pillar, the end parts of the pillar are fixedly connected with the chassis assembly 1, the middle part of the outer wall of the pillar is provided with a middle connecting rod 62, the end parts of the middle connecting rod 62 are rotationally connected with the electric push rod 22, the outer end parts of the side connecting rods 61 are rotationally connected with the front end of the bottom of the scissor lifting frame 21, the rear end of the bottom of the scissor lifting frame is slidingly connected with the chassis assembly 1, and the movable end of the electric push rod 22 is rotationally connected with the middle part of the rear end of the bottom of the scissor lifting frame 21;
The chassis assembly 1 comprises a cross beam 11 and a longitudinal beam 12, wherein the cross beam 11 and the longitudinal beam 12 form a rectangular frame structure, and sliding grooves for sliding the scissor type lifting frames are formed in the rear ends of the inner walls of the two cross beams 11.
The seat assembly 3 comprises a seat frame 31, reinforcing rods 32 and sliding rails 33, wherein the sliding rails 33 are arranged in the seat frame 31 at intervals, two sliding rails 33 are symmetrically arranged below the seat frame 31, the sliding rails 33 are fixedly connected with the seat frame 31 through the reinforcing rods 32, and the top ends of the scissor lifts 21 are embedded in the sliding rails 33 in a sliding manner; the sliding rail is used as a top guide structure of the scissor type lifting frame, and the side section of the sliding rail is U-shaped; the outer wall of the seat frame 31 is vertically and symmetrically provided with a positioning plate 311, the bottom surface of the backrest frame 4 is vertically and symmetrically provided with a rotating plate 41, and the rotating plate 41 is rotationally connected with the positioning plate 311.
The upper half part of the electric wheelchair has two modes of manual and semi-automatic:
Example 1, manual mode:
As shown in fig. 2-3, the armrest 5 is connected with the backrest frame 4 in a damping rotation manner, a U-shaped clamping ring 42 is arranged on the bottom surface of the backrest frame 4, the locking assembly comprises a first backrest locking mechanism 7, and the clamping ring 42 is assembled with the first backrest locking mechanism 7 in a clamping manner; the clamping ring with the U-shaped structure can realize locking, so that the clamping ring is prevented from moving upwards, and meanwhile, the clamping ring is matched with the box body, so that the backrest frame can be prevented from swinging left and right;
As shown in fig. 10, the first backrest locking mechanism comprises a handle, a clamping hook, a torsion spring and a box body, wherein the clamping hook is rotatably arranged in the box body, the torsion spring is arranged at the rotating joint, a clamping groove is formed in the lower part of the top end of the clamping hook, and the bottom of the clamping hook is connected with the handle which extends out of the box body;
When the folding device is folded, the two armrests are manually pulled upwards to be flush with the backrest frame, then the first handle is pressed down, the handle drives the clamping hooks to rotate upwards and compress the torsion springs, the clamping grooves of the clamping hooks rotate upwards to be separated from the clamping rings, at the moment, the backrest frame can be manually rotated downwards, and the clamping rings leave the box body; the backrest frame rotates downwards to a horizontal state, namely the storage is completed.
When the clamping ring is completely inserted, the clamping ring is arranged below the clamping groove, and the torsional spring drives the clamping hook to reset, so that the clamping ring can be embedded into the clamping groove.
Example 1 semi-automatic mode
As shown in fig. 4, a first torsion spring is installed at the rotation connection position of the armrest 5 and the backrest frame 4, and the first torsion spring is used for driving the armrest 5 to automatically fold; a second torsion spring is arranged at the rotary connection part of the backrest frame 4 and the seat frame 31 and is used for driving the backrest frame 4 to automatically fold; the locking assembly comprises a second backrest locking mechanism 9, the clamping ring 42 is assembled in a clamping way with the second backrest locking mechanism 9, the outer side wall of each sliding rail 33 is connected with a handrail supporting mechanism 8, and the handrail supporting mechanism 8 is used for supporting and unfolding and storing handrails in two states; the armrest supporting mechanism can be used for supporting the armrest in the unfolded state, so that the armrest supporting effect is better, collapse is avoided, the service life is longer, meanwhile, when the armrest is folded, the armrest supporting mechanism can stop, the armrest is prevented from being excessively stored under the drive of the first torsion spring to influence other parts, and the armrest supporting mechanism can stop the armrest to the required storage state; the first torsion spring and the second torsion spring can be utilized to realize that the backrest frame and the armrests automatically rotate and fold when the second backrest locking mechanism is unlocked.
As shown in fig. 4 and 5, the armrest supporting mechanism 8 includes a supporting plate 81 and a stop assembly 82, the supporting plate 81 is L-shaped, the supporting plate 81 is vertically and fixedly connected with the outer wall of the sliding rail 33, and the supporting plate 81 is located outside the armrest 5 and the seat frame 31; the design of the supporting plate can avoid other parts, ensure the normal actions of the armrests and the seat frame, and simultaneously can not influence the overall size and the riding space of the wheelchair;
A baffle 811 is vertically provided on the inner wall of the support plate 81, the baffle 811 is located at the bottom of the armrest 5 and the top of the seat frame 31, and the baffle 811 is used for stopping the armrest in the accommodated state; the baffle does not extend out of the armrest, so that the rotation of the backrest frame is not influenced, the baffle can block the rotation and storage of the armrest, and the armrest is positioned;
The top of the supporting plate 81 is penetrated with a stop component 82 in a sliding way, and the stop component 82 is arranged on the bottom surface of the armrest 5; the stop component is arranged above the baffle at intervals, the stop component can support and position the handrail progress in a supporting state, the handrail is prevented from collapsing and tilting, and meanwhile, the stop component can stretch out and draw back when being folded.
As shown in fig. 9, the second backrest locking mechanism 9 includes a second case 91, a clamping assembly 93, and an operating lever 94; the inside of second box body 91 is equipped with clamping assembly 93, the vertical card of snap ring 42 is gone into in clamping assembly 93, the vertical slidable mounting in top surface of second box body 91 has action bars 94, action bars 94 are used for promoting clamping assembly 93 and snap ring 42 separation.
The second backrest locking mechanism 9 further comprises a connecting rod assembly 92, one end of the connecting rod assembly 92 is connected with a clamping assembly 93, the other end of the connecting rod assembly 92 is connected with a stop assembly 82, and the connecting rod assembly 92 is used for driving the stop assembly 82 and the clamping assembly 93 to lock or unlock synchronously; when the clamping assembly is operated by the operating rod, the connecting rod assembly drives the stop assembly to synchronously act, so that one-step locking and locking are realized, one hand can be used for completing, and the operation is simple and convenient;
The stop assembly 82 includes a first box 821, a stop lever 822, a right angle ramp 823, a first spring 824, and a slider 825; the first box 821 is disposed on the outer wall of the support plate 81, a first chute is provided on the outer wall of the first box 821, a sliding block 825 is slidably embedded in the first chute, a stop lever 822 is slidably inserted in the sliding block 825, and a top block 8221 is fixed on the outer wall of the stop lever 822; the top block is of a flat plate structure, one side of the top block is a spherical surface, the other side of the top block is a plane, the spherical surface is attached to the right-angle inclined block, and the plane is connected with the spring;
the outer wall of the stop lever 822 is sleeved with a first spring 824, the first spring 824 is arranged between the sliding block 825 and the top block 8221, and the top block 8221 and the first spring 824 are positioned in the first box 821; the sliding block can ensure that the stop lever stably slides vertically and moves transversely, and plays a role in limiting and supporting; the first spring can drive the stop lever to extend out to the lower part of the handrail when the stop lever moves upwards;
A right-angle inclined block 823 is arranged on the inner side of the first box body 821, and the inclined edge of the right-angle inclined block 823 is in sliding fit with the top block 8221; the width of the right angle oblique block 823 gradually increases from top to bottom; the right-angle inclined block can push the top block outwards along with the downward movement of the stop lever, so that the top block drives the stop lever to move outwards and gradually leave the handrail, and automatic unlocking is realized;
A second sliding groove which is distributed opposite to the first sliding groove is formed in the right-angle inclined block 823, a third sliding groove is formed opposite to the second sliding groove in the supporting plate 81, one end of the stop lever 822 penetrates through the second sliding groove in a sliding mode, and the end portions of the third sliding groove extend into the bottom of the handrail 5; the design of the three sliding grooves can ensure that the stop lever can stably slide vertically and move horizontally so as to be matched with the vertical movement of the operating lever;
The other end of the stop lever 822 extends outwards from the first chute, a collar 9231 is sleeved on the outer wall of the extending part in a sliding manner, and the collar 9231 is fixedly connected with a connecting rod assembly; the lantern ring is used for driving the stop lever to move downwards and simultaneously ensuring that the stop lever can slide normally and transversely, the end part of the stop lever is a head part with larger area, and the head part is stopped at the outer end of the lantern ring; when the ejector rod supports the handrail, the supporting force of the connecting rod assembly is transmitted to the lantern ring, and then the stop lever is positioned through the lantern ring, so that the supporting effect of the stop lever on the handrail is ensured;
As shown in fig. 9, the clamping assembly 93 includes a clamping plate 931, a movable column 932, a support tube 933, and a second spring 934, wherein the second spring 934 is embedded in the support tube 933, the movable column 932 is slidingly embedded in the top of the support tube 933, the top end of the movable column 932 is symmetrically and rotatably connected with the clamping plate 931, the clamping plate 931 clamps the positioning clamp ring 42, and the top end side wall of the movable column 932 is fixedly connected with the operating rod 94; when the clamping ring is embedded, the two clamping plates are spread, and then the torsion springs at the joint of the clamping plates and the movable column are utilized to drive the clamping plates to reset for clamping and positioning the clamping ring; when the L-shaped operating rod is pressed downwards during separation, the movable column can be driven to move downwards and compress the second spring, and the two clamping plates are forced to be spread, so that the clamping rings are automatically separated.
As shown in fig. 8, the link assembly symmetrically and vertically slides on two sides of the second box body, the link assembly 92 includes a first link 921, a second link 922 and a third link 923, the third link is parallel on the outer side of the support plate, the top end of the third link is connected with a collar, the second link is vertically arranged at the bottom end of the third link, the first link and the second link are vertically arranged, the first link and the second link are horizontally arranged, and the end part of the first link is fixedly connected to the movable column.
The embodiment is implemented in specific:
and (3) unlocking: the operation rod is pressed downwards, then the movable column is driven to move downwards, the two clamping plates of the second spring are compressed to move downwards and are spread, and unlocking of the second backrest locking mechanism 7 is achieved; when the movable column moves downwards, the collar is driven to move downwards through the connecting rod assembly, the stop lever is driven to move downwards, the stop lever slides downwards along the second chute and the third chute, the sliding block slides downwards along the first chute, the top block slides along the inclined plane of the direct inclined block in the downward sliding process, the inclined plane pushes the top block to move outwards, and the top block drives the stop lever to slide outwards transversely and compress the first spring when moving outwards, so that the stop lever leaves the handrail, and the unlocking of the stop assembly is realized;
When the unlocking is finished synchronously, the torsion springs drive the backrest frame to rotate downwards, the torsion springs drive the armrests to rotate downwards, the backrest frame rotates downwards to be parallel to the seat frame, and the armrests rotate downwards to be in contact with the baffle plate, so that the armrests keep a horizontal folded state and cannot rotate excessively.
It is noted that relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. The utility model provides a many connecting rods foldable electronic wheelchair which characterized in that: the device comprises a scissor type lifting assembly, wherein an electric push rod for driving the scissor type lifting assembly to move in a telescopic manner is arranged in the scissor type lifting assembly; the front end of the bottom of the scissor type lifting assembly is rotationally connected with a pedal, the rear end of the bottom of the scissor type lifting assembly is slidably assembled in the chassis assembly, the front end of the chassis assembly is connected with a front wheel assembly, the rear end of the chassis assembly is connected with a rear wheel assembly, and the pedal is positioned between the two front wheel assemblies;
The top end of the scissor type lifting assembly is slidably connected with the seat assembly, the rear end of the seat assembly is rotationally connected with the backrest frame, the rear end of the seat assembly is provided with the locking assembly, the backrest frame and the locking assembly are assembled in a clamping way, and two sides of the backrest frame are symmetrically rotationally connected with armrests;
the seat assembly comprises a seat frame, reinforcing rods and sliding rails, wherein the sliding rails are arranged in the seat frame at intervals, two sliding rails are symmetrically arranged below the seat frame, the sliding rails are fixedly connected with the seat frame through the reinforcing rods, and the top ends of the scissor-type lifting frames are embedded in the sliding rails in a sliding manner;
the armrests are connected with the backrest frame in a damping rotation manner, a U-shaped clamping ring is arranged on the bottom surface of the backrest frame, the locking assembly comprises a first backrest locking mechanism, and the clamping ring is assembled with the first backrest locking mechanism in a clamping manner;
The bottom surface of the backrest frame is provided with a U-shaped clamping ring, a first torsion spring is arranged at the rotary joint of the armrest and the backrest frame, and the first torsion spring is used for driving the armrest to automatically retract; a second torsion spring is arranged at the rotary connection part of the backrest frame and the seat frame and is used for driving the backrest frame to automatically retract; the locking assembly comprises a second backrest locking mechanism, the clamping ring is assembled with the second backrest locking mechanism in a clamping way, the outer side wall of each sliding rail is connected with a handrail supporting mechanism, and the handrail supporting mechanism is used for supporting and unfolding and storing handrails in two states;
The handrail supporting mechanism comprises a supporting plate and a stop component, wherein the supporting plate is L-shaped, the supporting plate is vertically and fixedly connected with the outer wall of the sliding rail, the supporting plate is positioned on the outer side of the handrail and the seat frame, the inner wall of the supporting plate is vertically provided with a baffle plate, the baffle plate is positioned at the bottom of the handrail and the top of the seat frame, the baffle plate is used for stopping the handrail in a storage state, the top of the supporting plate is penetrated with the stop component in a sliding manner, and the stop component is arranged on the bottom surface of the handrail;
The second backrest locking mechanism comprises a second box body, a clamping assembly and an operating rod; the clamping assembly is arranged in the second box body, the clamping ring is vertically clamped in the clamping assembly, an operating rod is vertically and slidably arranged on the top surface of the second box body, and the operating rod is used for pushing the clamping assembly to be separated from the clamping ring;
The second backrest locking mechanism further comprises a connecting rod assembly, one end of the connecting rod assembly is connected with the clamping assembly, the other end of the connecting rod assembly is connected with the stop assembly, and the connecting rod assembly is used for driving the stop assembly and the clamping assembly to synchronously lock or unlock;
The stop component comprises a first box body, a stop lever, a right-angle inclined block, a first spring and a sliding block; the first box body is arranged on the outer wall of the supporting plate, a first sliding groove is formed in the outer wall of the first box body, a sliding block is embedded in the first sliding groove in a sliding mode, a stop lever is arranged in the sliding block in a sliding mode, a top block is fixed on the outer wall of the stop lever, a first spring is sleeved on the outer wall of the stop lever, the first spring is arranged between the sliding block and the top block, the top block and the first spring are arranged in the first box body, a right-angle inclined block is arranged on the inner side of the first box body, the inclined edge of the right-angle inclined block is in sliding fit with the top block, the width of the right-angle inclined block is gradually increased from top to bottom, a second sliding groove which is distributed opposite to the first sliding groove is formed in the right-angle inclined block, a third sliding groove is formed in the supporting plate and the second sliding groove in a sliding mode, one end of the stop lever is in a sliding mode, the end of the second sliding groove and the end of the third sliding groove are arranged at the bottom of the handrail in an extending mode, the outer wall of the extending portion is in a sliding mode, and a lantern ring is fixedly connected with the connecting rod assembly in a sleeved mode;
The chassis assembly comprises a cross beam, longitudinal beams, wherein the cross beam and the longitudinal beams form a rectangular frame structure, and sliding grooves for the scissor type lifting frames to slide are formed in the rear ends of the inner walls of the two cross beams.
2. The multi-link folding electric wheelchair of claim 1, wherein: the utility model provides a scissors formula lifting assembly, including scissors formula lifting frame and electric putter, the back both ends symmetry of running-board is equipped with the side connecting rod, two the middle part of side connecting rod is run through there is the pillar, the tip fixed connection chassis subassembly of pillar, the outer wall middle part of pillar is equipped with the middle part connecting rod, the tip rotation of middle part connecting rod connects electric putter, the outer tip rotation of side connecting rod connects the bottom front end of scissors formula lifting frame, the bottom rear end sliding connection chassis subassembly of scissors formula lifting frame, electric putter's expansion end rotates the bottom rear end of connecting scissors formula lifting frame.
3. A multi-link folding electric wheelchair according to claim 2, characterized in that: the clamping assembly comprises a clamping plate, a movable column, a supporting tube and a second spring, wherein the second spring is embedded in the supporting tube, the movable column is slidably embedded in the top of the supporting tube, the clamping plate is symmetrically and rotatably connected to the top end of the movable column, the clamping plate clamps the positioning clamping ring, and the side wall of the top end of the movable column is fixedly connected with the operating rod.
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| CN202110465977.0A CN113143612B (en) | 2021-04-28 | 2021-04-28 | Multi-connecting-rod folding electric wheelchair |
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| CN202110465977.0A CN113143612B (en) | 2021-04-28 | 2021-04-28 | Multi-connecting-rod folding electric wheelchair |
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| CN113143612B true CN113143612B (en) | 2024-06-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113797033B (en) * | 2021-09-14 | 2023-10-03 | 安徽金百合医疗器械有限公司 | Lying-posture-adjustable electric wheelchair |
| CN117180016A (en) * | 2023-09-27 | 2023-12-08 | 南京康尼机电股份有限公司 | A seat back and seat capable of carrying multiple accessories |
| CN118593259B (en) * | 2024-06-04 | 2025-10-28 | 佛山市顺康达医疗科技有限公司 | A linkage folding wheelchair |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN214761867U (en) * | 2021-04-28 | 2021-11-19 | 安徽金百合医疗器械有限公司 | Multi-connecting-rod folding type electric wheelchair |
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| WO1998011857A1 (en) * | 1996-09-23 | 1998-03-26 | Jesuvino Moleirinho | Universal wheelchair for the handicapped |
| CN202497356U (en) * | 2011-11-03 | 2012-10-24 | 刘生才 | Portable miniature low speed foldable electric leisure chair vehicle |
| CN110090118A (en) * | 2018-01-31 | 2019-08-06 | 四川阿斯特医疗器械有限公司 | Full fully collapsible invalid's chair |
| CN208785092U (en) * | 2018-04-09 | 2019-04-26 | 南京金百合医疗器械有限公司 | A kind of electric folding wheel chair of the built-in contact cell of turnable handrail |
| JP6600038B2 (en) * | 2018-04-17 | 2019-10-30 | 橘色創意科技股▲ふん▼有限公司 | Folding wheelchair |
| CN208929754U (en) * | 2018-09-30 | 2019-06-04 | 河源成兴精密模具有限公司 | A kind of rotary positioning apparatus in toy processing equipment |
| CN211326222U (en) * | 2019-04-09 | 2020-08-25 | 李卫芹 | Department of general surgery's nursing device |
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| CN214761867U (en) * | 2021-04-28 | 2021-11-19 | 安徽金百合医疗器械有限公司 | Multi-connecting-rod folding type electric wheelchair |
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