CN113143612A - Multi-connecting-rod folding type electric wheelchair - Google Patents
Multi-connecting-rod folding type electric wheelchair Download PDFInfo
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- CN113143612A CN113143612A CN202110465977.0A CN202110465977A CN113143612A CN 113143612 A CN113143612 A CN 113143612A CN 202110465977 A CN202110465977 A CN 202110465977A CN 113143612 A CN113143612 A CN 113143612A
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- assembly
- sliding
- type lifting
- clamping
- backrest
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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
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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
- A61G5/0808—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
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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
- A61G5/1043—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
A multi-connecting-rod folding type electric wheelchair comprises a scissor type lifting assembly, wherein an electric push rod for driving the scissor type lifting assembly to do telescopic motion is arranged in the scissor type lifting assembly; the front end of the bottom of the scissor type lifting assembly is rotatably 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 connected with a chair assembly in a sliding mode, the rear end of the chair assembly is rotatably connected with a backrest frame, a locking assembly is arranged at the rear end of the chair assembly, the backrest frame and the locking assembly are assembled in a clamping mode, and armrests are symmetrically and rotatably connected to two sides of the backrest frame; the electric push rod can drive the scissor type lifting assembly to open and close to lift, so that the bottom of the wheelchair can be automatically folded; the armrests on the upper area of the wheels can be rotatably folded, and the backrest frame can also be rotatably folded to be in a horizontal state, so that the whole wheelchair is small in storage volume and simple 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 type electric wheelchair.
Background
The electric wheelchair is mainly used for electrically driven wheelchairs, is a transportation tool and an auxiliary tool aiming at walking replacement, can be folded without disassembling a battery, and is convenient to carry and store; however, the electric wheelchair in the market at present cannot be folded, occupies a large space when being placed or parked, cannot be carried by vehicles and automobiles, and cannot be used for traveling.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a multi-connecting-rod folding type electric wheelchair, which has the following specific technical scheme:
a multi-connecting-rod folding type electric wheelchair comprises a scissor type lifting assembly, wherein an electric push rod for driving the scissor type lifting assembly to do telescopic motion is arranged in the scissor type lifting assembly; the front end of the bottom of the scissor type lifting assembly is rotatably connected with a pedal, the rear end of the bottom of the scissor type lifting assembly is assembled in the chassis assembly in a sliding manner, 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 connected with the chair assembly in a sliding mode, the rear end of the chair assembly is connected with the backrest frame in a rotating mode, the rear end of the chair assembly is provided with the locking assembly, the backrest frame and the locking assembly are assembled in a clamping mode, and armrests are symmetrically and rotatably connected to two sides of the backrest frame.
Further, the shear type lifting assembly comprises a shear type lifting frame and an electric push rod, side connecting rods are symmetrically arranged at two ends of the back of the pedal plate, a support column penetrates through the middle of each of the side connecting rods, the end part of the support column is fixedly connected with a chassis assembly, a middle connecting rod is arranged in the middle of the outer wall of the support column, the end part of the middle connecting rod is rotatably connected with the electric push rod, the outer end part of each side connecting rod is rotatably connected with the front end of the bottom of the shear type lifting frame, the rear end of the bottom of the shear type lifting frame is slidably connected with the chassis assembly, and the movable end of the electric push rod is rotatably connected with the rear end of the bottom of the shear type lifting frame.
Furthermore, the seat assembly comprises a seat frame, reinforcing rods and sliding rails, the sliding rails are arranged in the seat frame at intervals, the two sliding rails are symmetrically arranged and located below the seat frame, the sliding rails are fixedly connected with the seat frame through the reinforcing rods, and the top ends of the shear type lifting frames are embedded into the sliding rails in a sliding mode.
Furthermore, the armrests are connected with the backrest frame in a damping rotation mode, 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 mode.
Furthermore, a first torsion spring is arranged at the rotary connection position of the armrest and the backrest frame and is used for driving the armrest to automatically furl; 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 furl; 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 a handrail supporting mechanism, and the handrail supporting mechanisms are used for supporting handrails which are unfolded and stored in two states.
Furthermore, the handrail supporting mechanism comprises a supporting plate and a stopping component, 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 located on the outer side of the handrail and the seat frame, a baffle is vertically arranged on the inner wall of the supporting plate and located at the bottom of the handrail and the top of the seat frame, the baffle is used for stopping the handrail in a storage state, the stopping component penetrates through the top of the supporting plate in a sliding mode, and the stopping component is arranged on the bottom surface of the 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 centre gripping subassembly, the vertical card of snap ring is gone into in the centre gripping subassembly, the vertical slidable mounting of top surface of second box body has the action bars, the action bars is used for promoting centre gripping subassembly and snap ring separation.
Furthermore, 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 stopping assembly, and the connecting rod assembly is used for driving the stopping assembly and the clamping assembly to be synchronously locked or unlocked.
Furthermore, the stop component comprises a first box body, a stop rod, 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, the outer wall of the first box body is provided with a first sliding groove, a sliding block is embedded in the first sliding groove in a sliding mode, a stop lever penetrates through the inside of the sliding block in a sliding mode, an ejector 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 is arranged between the sliding block and the ejector block, the ejector block and the first spring are located in the first box body, a right-angle inclined block is arranged on the inner side of the first box body, the bevel edge of the right-angle inclined block is in sliding fit with the ejector block, the width of the right-angle inclined block is gradually increased from top to bottom, a second sliding groove which is distributed relative 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 relative opening mode, and one end of the stop lever penetrates through the second sliding groove and the end of the third sliding groove and extends into the bottom of the handrail, the other end of the stop lever extends out of the first sliding groove, a lantern ring is sleeved on the outer wall of the extending part in a sliding mode, and the lantern ring is fixedly connected with the connecting rod assembly.
Further, the centre gripping subassembly includes splint, activity post, stay tube, second spring, the inside embedding of stay tube has the second spring, the inside top of stay tube slides and imbeds there is the activity post, the top symmetry swivelling joint of activity post has splint, splint centre gripping location snap ring, the top lateral wall fixed connection action bars of activity post.
The invention has the beneficial effects that: the scissor type lifting component can be driven to open and close and lift through the electric push rod, so that the bottom of the wheelchair can be automatically folded; the armrests on the upper area of the wheels can be rotatably folded, and the backrest frame can also be rotatably folded to be in a horizontal state, so that the whole wheelchair is small in storage volume and simple and convenient to operate.
Drawings
FIG. 1 is a schematic structural view of a multi-link folding electric wheelchair of the present invention;
FIG. 2 is a schematic view of a first level fold configuration of the wheelchair of the present invention;
FIG. 3 is a schematic view of a two-stage folding configuration of the wheelchair of the present invention;
FIG. 4 is a schematic structural view of a semi-automatic stowing electric wheelchair of the present invention;
FIG. 5 shows a front cross-sectional structural view of FIG. 4;
FIG. 6 shows an enlarged schematic view of FIG. 5 at A;
FIG. 7 shows a schematic view of the right angle swash block assembly of the present invention;
FIG. 8 illustrates a schematic structural view of the connecting rod assembly of the present invention;
FIG. 9 shows a schematic view of a second backrest locking mechanism of the present invention;
FIG. 10 shows a schematic view of a first backrest locking mechanism of the present invention;
FIG. 11 illustrates a schematic control scheme for the scissor lift assembly of the present invention;
shown in the figure: 1. a chassis assembly; 11. a cross beam; 12. a stringer; 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. positioning a plate; 32. a reinforcing bar; 33. a slide rail; 4. a backrest frame; 41. rotating the plate; 42. a snap ring; 5. a handrail; 6. a foot pedal; 61. a side link; 62. a middle connecting rod; 7. a first backrest locking mechanism; 8. a handrail support mechanism; 81. a support plate; 811. a baffle plate; 82. a stop assembly; 821. a first case; 822. a stop lever; 8221. a top block; 823. a right-angle sloping block; 824. a first spring; 825. a slider; 9. a second backrest locking mechanism; 91. a second box body; 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 splint; 932. a movable post; 933. supporting a tube; 934. a second spring; 94. an operating lever.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the multi-link folding electric wheelchair comprises a scissor type lifting assembly 2, wherein an electric push rod 22 for driving the scissor type lifting assembly 2 to move telescopically is arranged in the scissor type lifting assembly 2; the front end of the bottom of the scissor type lifting assembly 2 is rotatably 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 is connected with a rear wheel assembly, and the pedal 6 is positioned between the two front wheel assemblies; the scissor type lifting component can be driven to open and close and lift through the electric push rod, so that the bottom of the wheelchair can be automatically folded;
the top end of the scissor type lifting assembly 2 is connected with a chair assembly 3 in a sliding manner, the rear end of the chair assembly 3 is rotatably connected with a backrest frame 4, a locking assembly is arranged at the rear end of the chair assembly 3, the backrest frame 4 and the locking assembly are assembled in a clamping manner, and armrests are symmetrically and rotatably connected to two sides of the backrest frame 4; the armrests on the upper area of the wheels can be rotatably folded, and the backrest frame can also be rotatably folded to be in a horizontal state, so that the whole wheelchair is small in storage volume and simple and convenient to operate.
As shown in fig. 1, the scissors type lifting assembly 2 includes a scissors type lifting frame 21 and an electric push rod 22, two ends of the back of the pedal 6 are symmetrically provided with side connecting rods 61, a support column penetrates through the middle of the two side connecting rods 61, the end of the support column is fixedly connected with the chassis assembly 1, the middle part of the outer wall of the support column is provided with a middle connecting rod 62, the end of the middle connecting rod 62 is rotatably connected with the electric push rod 22, the outer end of the side connecting rod 61 is rotatably connected with the front end of the bottom of the scissors type lifting frame 21, the rear end of the bottom of the scissors type lifting frame is slidably connected with the chassis assembly 1, and the movable end of the electric push rod 22 is rotatably connected with the middle part of the rear end of the bottom of the scissors type lifting frame 21;
the chassis assembly 1 comprises cross beams 11 and longitudinal beams 12, the cross beams 11 and the longitudinal beams 12 form a rectangular frame structure, and sliding grooves for sliding of the shear 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, a reinforcing rod 32 and slide rails 33, the slide rails 33 are arranged at intervals in the seat frame 31, the two slide rails 33 are symmetrically arranged and are positioned below the seat frame 31, the slide rails 33 are fixedly connected with the seat frame 31 through the reinforcing rod 32, and the top ends of the scissor type lifting frames 21 are embedded in the slide rails 33 in a sliding manner; the sliding rail is used as a top guide structure of the shear 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 rotatably connected with the positioning plate 311.
The upper half part of the electric wheelchair has two manual and semi-automatic modes:
example 1, manual mode:
as shown in fig. 2-3, the armrest 5 is connected with the backrest frame 4 in a damped rotation manner, a U-shaped snap 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 snap ring 42 is assembled with the first backrest locking mechanism 7 in a snap fit manner; the clamping ring with the U-shaped structure can realize locking, the upward movement of the clamping ring is avoided, and meanwhile, the left and right swinging of the backrest frame can also be avoided due to the matching of the clamping ring and the box body;
as shown in fig. 10, the first backrest locking mechanism includes a handle, a hook, a torsion spring, and a box body, the hook is rotatably installed in the box body, the torsion spring is installed at a rotating connection position, a clamping groove is formed at the lower part of the top end of the hook, and the bottom of the hook is connected with the handle extending out of the box body;
when the folding backrest is folded, the two armrests are manually pulled upwards to be flush with the backrest frame, then the first handle is pressed downwards, the handle drives the clamping hooks to upwards rotate and compress the torsion springs, the clamping grooves of the clamping hooks upwards rotate to be separated from the clamping rings, at the moment, the backrest frame can be manually downwards rotated, and the clamping rings are separated from the box body; the backrest frame rotates downwards to a horizontal state, namely the storage is completed.
When the expansion, upwards rotate the back frame, insert the in-process to the box body at the snap ring, the snap ring can extrude the pothook for the pothook is compelled to rotate the compression torsional spring, and when the snap ring was inserted completely, the below of draw-in groove was arranged in to the snap ring, and the torsional spring drives the pothook and resets, can make the snap ring imbed into the draw-in groove.
Example 1, semi-automatic mode
As shown in fig. 4, a first torsion spring is installed at a rotational 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 close; 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 furl; the locking assembly comprises a second backrest locking mechanism 9, the clamp ring 42 is clamped and assembled with the second backrest locking mechanism 9, the outer side wall of each slide rail 33 is connected with a handrail supporting mechanism 8, and the handrail supporting mechanisms 8 are used for supporting handrails in an unfolding state and a storage state; the handrail in the unfolding state can be supported by the handrail supporting mechanism, so that the handrail is better in supporting effect, free of collapse and longer in service life, meanwhile, when the handrail is folded, the handrail supporting mechanism can stop, the situation that the handrail is excessively stored under the driving of the first torsion spring to influence other parts is avoided, and the handrail can be stopped to the required storage state by the handrail supporting mechanism; when the second backrest locking mechanism is unlocked, the backrest frame and the armrests can automatically rotate and fold by utilizing the first torsion spring and the second torsion spring.
As shown in fig. 4 and 5, the armrest support mechanism 8 includes a support plate 81 and a stop assembly 82, the support plate 81 is L-shaped, the support plate 81 is vertically and fixedly connected to the outer wall of the slide rail 33, and the support plate 81 is located outside the armrest 5 and the seat frame 31; the design of the supporting plate can avoid other parts, so that the normal action of the armrests and the seat frame is ensured, and the whole size and the riding space of the wheelchair are not influenced;
a baffle 811 is vertically arranged on the inner wall of the supporting plate 81, the baffle 811 is positioned 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 storage state; the baffle plate does not extend out of the armrest, the rotation of the backrest frame cannot be influenced, the baffle plate can block the armrest from rotating and accommodating, and the armrest is positioned;
a stopping component 82 penetrates through the top of the supporting plate 81 in a sliding manner, and the stopping component 82 is arranged on the bottom surface of the handrail 5; the top of baffle is arranged in to backstop subassembly interval, and the backstop subassembly can support the location to the handrail progress of support state, avoids the handrail slope of collapsing, and the scalable activity of backstop subassembly can be packed up when folding simultaneously.
As shown in fig. 9, the second backrest locking mechanism 9 includes a second box 91, a clamping assembly 93 and an operating lever 94; the inside of second box body 91 is equipped with centre gripping subassembly 93, the vertical card of snap ring 42 is gone into in centre gripping subassembly 93, the vertical slidable mounting in top surface of second box body 91 has action bars 94, action bars 94 is used for promoting centre gripping subassembly 93 and snap ring 42 separation.
The second backrest locking mechanism 9 further includes a connecting rod assembly 92, one end of the connecting rod assembly 92 is connected to a clamping assembly 93, the other end of the connecting rod assembly 92 is connected to the stopping assembly 82, and the connecting rod assembly 92 is used for driving the stopping assembly 82 and the clamping assembly 93 to be locked or unlocked synchronously; when the clamping assembly is operated through the operating rod, the connecting rod assembly drives the stop assembly to synchronously act, so that the one-step locking and locking can be realized, the operation can be finished by one hand, and the operation is simple and convenient;
the stopping component 82 comprises a first box body 821, a stop lever 822, a right-angle inclined block 823, a first spring 824 and a sliding block 825; the first box body 821 is arranged on the outer wall of the supporting plate 81, a first sliding groove is formed in the outer wall of the first box body 821, a sliding block 825 is embedded into the first sliding groove in a sliding mode, a blocking rod 822 penetrates through the sliding block 825 in a sliding mode, and a top block 8221 is fixed on the outer wall of the blocking rod 822; the top block is of a flat sheet 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;
a first spring 824 is sleeved on the outer wall of the blocking rod 822, 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 body 821; the slide 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 of the handrail when the stop lever moves upwards;
a right-angle oblique block 823 is arranged on the inner side of the first box body 821, and the oblique edge of the right-angle oblique block 823 is in sliding fit with the top block 8221; the width of the right-angle oblique block 823 is gradually increased from top to bottom; the right-angle inclined block can push the ejector block outwards along with the downward movement of the stop lever, so that the ejector 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 in the supporting plate 81 and the second sliding groove, and one end of the stop lever 822 penetrates through the second sliding groove in a sliding manner and the end part of the third sliding groove to 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 transversely so as to be matched with the vertical movement of the operating lever;
the other end of the stop lever 822 extends out of the first sliding chute, a lantern ring 9231 is slidably sleeved on the outer wall of the extending part, and the lantern ring 9231 is fixedly connected with the connecting rod assembly; the lantern ring is used for driving the stop lever to move downwards and ensuring that the stop lever can normally and transversely slide, the end part of the stop lever is a head part with a larger area, and the head part is stopped at the outer end of the lantern ring; when the top rod supports the handrail, the supporting force of the connecting rod assembly is transmitted to the lantern ring, and then the stop rod is positioned through the lantern ring, so that the supporting effect of the stop rod 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, a second spring 934, the second spring 934 is embedded in the support tube 933, the movable column 932 is slidably embedded in the top of the support tube 933, the clamping plate 931 is symmetrically and rotatably connected to the top end of the movable column 932, the clamping plate 931 clamps the positioning snap ring 42, and the operating rod 94 is fixedly connected to the side wall of the top end of the movable column 932; when the snap ring is embedded, the two clamping plates can be opened, and then the torsional spring at the joint of the clamping plates and the movable column is utilized to drive the clamping plates to reset to clamp and position the snap 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 both sides of second box body are located to the vertical slip of link assembly symmetry, and link assembly 92 includes first connecting rod 921, second connecting rod 922 and third connecting rod 923, and the outside of backup pad is arranged in to the third connecting rod parallel, and the lantern ring is connected on the top of third connecting rod, and the bottom of third connecting rod is located perpendicularly to the second connecting rod, and first connecting rod sets up with the second connecting rod is perpendicular, and the equal level of first connecting rod, second connecting rod sets up, the tip fixed connection of first connecting rod to the activity post.
The above embodiments are embodied as follows:
an unlocking process: the operating rod is pressed downwards, then the movable column is driven to move downwards and compress the second spring, and the two clamping plates move downwards and are spread, so that the second backrest locking mechanism 7 is unlocked; when the movable column moves downwards, the connecting rod assembly drives the lantern ring to move downwards, so that the stop lever is driven to move downwards, the stop lever slides downwards along the second sliding groove and the third sliding groove, the sliding block slides downwards along the first sliding groove, the ejector block slides along the inclined plane of the direct inclined block in the downward sliding process, the inclined plane pushes against the ejector block to move outwards, the ejector block drives the stop lever to slide outwards and transversely and compresses 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 completed synchronously, the torsion spring drives the backrest frame to rotate downwards, the torsion spring drives the armrests to rotate downwards, the backrest frame rotates downwards to be parallel to the seat frame, and the armrests rotate downwards to be abutted against the baffle plate, so that the armrests keep a horizontal furled state and cannot rotate excessively.
It is noted that, in this document, 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. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a foldable electronic wheelchair of many connecting rods which characterized in that: the scissor type lifting mechanism comprises a scissor type lifting assembly, wherein an electric push rod for driving the scissor type lifting assembly to do telescopic motion is arranged in the scissor type lifting assembly; the front end of the bottom of the scissor type lifting assembly is rotatably connected with a pedal, the rear end of the bottom of the scissor type lifting assembly is assembled in the chassis assembly in a sliding manner, 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 connected with the chair assembly in a sliding mode, the rear end of the chair assembly is connected with the backrest frame in a rotating mode, the rear end of the chair assembly is provided with the locking assembly, the backrest frame and the locking assembly are assembled in a clamping mode, and armrests are symmetrically and rotatably connected to two sides of the backrest frame.
2. The multi-link folding electric wheelchair as claimed in claim 1, wherein: the scissors type lifting assembly comprises a scissors type lifting frame and an electric push rod, side connecting rods are symmetrically arranged at two ends of the back of the pedal plate, a supporting column penetrates through the middle of each of the two side connecting rods, the end part of the supporting column is fixedly connected with a chassis assembly, a middle connecting rod is arranged in the middle of the outer wall of the supporting column, the end part of the middle connecting rod is rotatably connected with the electric push rod, the outer end part of each side connecting rod is rotatably connected with the front end of the bottom of the scissors type lifting frame, the rear end of the bottom of the scissors type lifting frame is slidably connected with the chassis assembly, and the movable end of the electric push rod is rotatably connected with the rear end of the bottom of the scissors type lifting frame.
3. The multi-link folding electric wheelchair as claimed in claim 2, wherein: the seat assembly comprises a seat frame, reinforcing rods and sliding rails, the sliding rails are arranged in the seat frame at intervals, the two sliding rails are symmetrically arranged and located below the seat frame, the sliding rails are fixedly connected with the seat frame through the reinforcing rods, and the top ends of the shear type lifting frames are slidably embedded into the sliding rails.
4. The multi-link folding electric wheelchair as claimed in claim 3, wherein: the armrest is connected with the backrest frame in a damping rotating mode, a U-shaped clamping ring is arranged on the bottom face 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 mode.
5. The multi-link folding electric wheelchair as claimed in claim 3, wherein: the bottom surface of the backrest frame is provided with a U-shaped snap ring, a first torsion spring is arranged at the rotary connection part of the handrail and the backrest frame and used for driving the handrail to be automatically folded; 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 furl; 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 a handrail supporting mechanism, and the handrail supporting mechanisms are used for supporting handrails which are unfolded and stored in two states.
6. The multi-link folding electric wheelchair as claimed in claim 5, wherein: the handrail supporting mechanism comprises a supporting plate and a stopping component, 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 located on the outer side of the handrail and the seat frame, a baffle is vertically arranged on the inner wall of the supporting plate and located at the bottom of the handrail and the top of the seat frame, the baffle is used for stopping the handrail in a storage state, the stopping component penetrates through the top of the supporting plate in a sliding mode, and the stopping component is arranged on the bottom surface of the handrail.
7. The multi-link folding electric wheelchair as claimed in claim 6, wherein: 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 centre gripping subassembly, the vertical card of snap ring is gone into in the centre gripping subassembly, the vertical slidable mounting of top surface of second box body has the action bars, the action bars is used for promoting centre gripping subassembly and snap ring separation.
8. The multi-link foldable electric wheelchair as claimed in claim 7, wherein: 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 stopping assembly, and the connecting rod assembly is used for driving the stopping assembly and the clamping assembly to be synchronously locked or unlocked.
9. The multi-link foldable electric wheelchair as claimed in claim 8, wherein: 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, the outer wall of the first box body is provided with a first sliding groove, a sliding block is embedded in the first sliding groove in a sliding mode, a stop lever penetrates through the inside of the sliding block in a sliding mode, an ejector 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 is arranged between the sliding block and the ejector block, the ejector block and the first spring are located in the first box body, a right-angle inclined block is arranged on the inner side of the first box body, the bevel edge of the right-angle inclined block is in sliding fit with the ejector block, the width of the right-angle inclined block is gradually increased from top to bottom, a second sliding groove which is distributed relative 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 relative opening mode, and one end of the stop lever penetrates through the second sliding groove and the end of the third sliding groove and extends into the bottom of the handrail, the other end of the stop lever extends out of the first sliding groove, a lantern ring is sleeved on the outer wall of the extending part in a sliding mode, and the lantern ring is fixedly connected with the connecting rod assembly.
10. The multi-link foldable electric wheelchair as claimed in claim 9, wherein: the clamping assembly comprises a clamping plate, a movable column, a supporting tube and a second spring, the second spring is embedded into the supporting tube, the movable column is embedded into the top of the supporting tube in a sliding mode, the clamping plate is connected to the top end of the movable column in a rotating mode symmetrically, the clamping plate clamps the positioning clamping ring, and the top end side wall of the movable column is fixedly connected with the operating rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110465977.0A CN113143612B (en) | 2021-04-28 | 2021-04-28 | Multi-connecting-rod folding electric wheelchair |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110465977.0A CN113143612B (en) | 2021-04-28 | 2021-04-28 | Multi-connecting-rod folding electric wheelchair |
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| CN113143612A true CN113143612A (en) | 2021-07-23 |
| CN113143612B CN113143612B (en) | 2024-06-18 |
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| CN202110465977.0A Active CN113143612B (en) | 2021-04-28 | 2021-04-28 | Multi-connecting-rod folding electric wheelchair |
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| CN113797033A (en) * | 2021-09-14 | 2021-12-17 | 安徽金百合医疗器械有限公司 | Electric wheelchair with adjustable lying posture |
| 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 |
| CN118593259A (en) * | 2024-06-04 | 2024-09-06 | 佛山市顺康达医疗科技有限公司 | A linkage folding wheelchair |
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| 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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| CN113143612B (en) | 2024-06-18 |
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