EP3515389A1 - Wheelchair - Google Patents
WheelchairInfo
- Publication number
- EP3515389A1 EP3515389A1 EP17765407.6A EP17765407A EP3515389A1 EP 3515389 A1 EP3515389 A1 EP 3515389A1 EP 17765407 A EP17765407 A EP 17765407A EP 3515389 A1 EP3515389 A1 EP 3515389A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wheelchair according
- pivot axis
- chassis
- drive unit
- wheelchair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000008878 coupling Effects 0.000 claims abstract description 18
- 238000010168 coupling process Methods 0.000 claims abstract description 18
- 238000005859 coupling reaction Methods 0.000 claims abstract description 18
- 239000013536 elastomeric material Substances 0.000 claims description 6
- 239000006096 absorbing agent Substances 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000007822 coupling agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
- A61G5/041—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven having a specific drive-type
- A61G5/043—Mid wheel drive
-
- 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
- A61G5/06—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps
-
- 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
- A61G5/1078—Parts, details or accessories with shock absorbers or other suspension arrangements between wheels and frame
-
- 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
- A61G5/1089—Anti-tip devices
Definitions
- the invention relates to a wheelchair with a chassis, on each of which at least one drive wheel and an electric drive having drive unit, arranged on a front pivot arm front wheel and a rear wheel are arranged and the drive unit and the front pivoting arm in a vertical plane are arranged pivotably relative to the chassis and coupled to each other via a first coupling means.
- Such a six-wheeled wheelchair is known for example from US 9,308,143 B2.
- the coupling of drive unit and front arm can be done via a spring / damper unit.
- This is articulated at its two ends, the bearings are arranged to each other so that when the wheelchair moves on a straight horizontal plane, the majority of the force applied by the spring / damper unit force acts on the drive wheel to to get a good traction.
- a wheelchair with mid-wheel drive is characterized by a very small turning circle. Due to the fact that the center of gravity, ie the body pivot point, of the user lies above the drive axle, this wheelchair can also be driven in the narrowest of spaces. In addition, such a wheelchair also provides optimal traction through the weight distribution. By coupling the front pivot arm to the drive when passing over obstacles, such as curbs, only small movements in the seat and thus initiated on the driver.
- the object of the invention is to improve the known wheelchair in terms of its driving properties and its ability to increase its edge.
- the object is achieved in that the drive unit and the front pivot arm are additionally coupled to one another via a second coupling means. Due to the second coupling means, it is possible to decouple the front wheel and drive unit at two points, so that the additional possibility of decoupling less hard impacts when driving on an uneven surface (cobblestones) on the drive carrier and thus reach the seat of the wheelchair.
- the driving behavior is thus much more pleasant for the user, which is a significant gain in comfort especially for the severely disabled users.
- the front and / or rear wheel may be a steering wheel.
- DE 20 2010 005 233 U1 discloses a generic electric wheelchair comprising a drive frame receiving a drive frame, a front wheel frame and a chassis. Between the front wheel frame and the drive frame, a front shock absorber is provided as the only coupling means. An auxiliary shock absorber is arranged between the drive frame and the chassis. When passing over an obstacle, the front wheel pivots upward, the front shock absorber is compressed and forces the drive frame to the ground, whereby the tension spring is tensioned in the auxiliary shock absorber.
- US 2005/0127631 A1 and US 2008/0264702 A1 disclose electric wheelchairs in which the front pivot arm are coupled to the drive unit via a shock absorber as coupling means.
- the first and / or second coupling means may be a spring and / or damper unit. If the second coupling means is a spring and / or damper unit, it may well be sufficient if the first coupling means is formed by a rigid connecting rod or the like.
- the second coupling means is a rocker pivotally mounted to the chassis about a first pivot axis A and a second pivot axis B, in which the front pivot arm is pivotally mounted about a third pivot axis C and the drive unit is pivotally mounted about a fourth pivot axis D.
- first A and the second B pivot axis lie on an imaginary line which is at an angle ⁇ from 0 ° to 45 ° relative to the vertical, a parallelogram of the pivot points is established, which results in that the pivot points of the pivot arm and the drive unit are variable both in their horizontal and in their vertical position, ie their position changes during a movement.
- the rocker is preferably formed from two opposing yokes, which are connected to each other via at least one upper, the first pivot axis A receiving plate and at least one lower, the second pivot axis B receiving plate.
- Each yoke can be formed from two parallel plates, which can be configured substantially triangular and are connected to one another via a bolt.
- each yoke forming plate is connected to an upper and lower plate and the upper plates are connected via a first pin and the lower plates via a second pin.
- the first and second bolts may be identical.
- the upper and lower plates may be elastically supported in a housing attached to the chassis. Also, the upper plate and the lower plate may be elastically connected to each other. Such a connection can be realized, for example, via at least one spring element, which in particular can be a torsion spring.
- connection of the upper plate to the lower plate can also take place via at least one element consisting of an elastomeric material (eg a rubber buffer).
- an elastomeric material eg a rubber buffer
- the rear wheel is disposed on a pivotally connected to the chassis rear swing arm. If between the rear
- a third spring / damper unit is arranged is Effectively prevents the chassis from being subjected to excessive vibrations when driving on uneven ground.
- the rear pivot arm and the drive unit are preferably not coupled with each other in their movements.
- the third pivot axis is arranged on one side of the imaginary line and the fourth pivot axis on the opposite side of the imaginary line.
- the elastic means are provided in the rocker at the articulation point of the front pivot arm.
- the elastic means may be arranged in the rocker at the articulation point of the drive unit, wherein the elastic means may be arranged both at the articulation point of the pivot arm and at the articulation point of the drive unit.
- the elastic means surround the first and second pivot axes.
- first and second bolts have at least two diametrically arranged lugs and the elastic means surround the first and second pivot axes, the upper and lower plates connecting the two yokes can pivot.
- the lugs are embedded in the element consisting of an elastomeric material.
- the upper plate may be connected to the lower plate in a preferred embodiment via two spring elements. Then, the first spring element in Be arranged portion of the third pivot axis and the second spring element in the region of the fourth pivot axis.
- the wheelchair preferably has a seat and on the drive unit may be formed in a preferred embodiment, a pivoting arm.
- the seat is arranged on the chassis.
- FIG. 1 shows a wheelchair in a simplified side view
- Figure 2 shows a detail of Figure 1
- FIG. 3 shows the illustration according to FIG. 2 with the steering wheel lowered
- FIG. 4 shows the illustration according to FIG. 2 with the steering wheel raised
- Figure 5 is an enlarged view of Figure 4 without drive wheel
- Figure 6 is a first partial perspective view of the wheelchair
- Figure 7 is a second partial perspective view of a wheelchair
- Figure 8 is a partial view of the wheelchair
- Figure 9 is an enlarged view of Figure 8.
- Figure 10 is an enlarged partial view of Figure 9;
- Figure 1 1, the representation of Figure 10 with explanations;
- Figure 1 1 a an enlarged view of the spring and / or damper unit
- FIG. 1 1 b shows an enlarged detail of Fig. 1 1 a
- FIG. 12 shows the illustration according to FIG. 10 partially cut away
- FIG. 13 is a schematic diagram
- Figure 14 is a further schematic diagram
- Figure 15 is a perspective view of the rocker in a first embodiment
- FIG. 16 is a perspective view of the rocker in a second embodiment
- FIG. 17 shows the perspective view of the rocker in a third embodiment
- Figure 18 shows the representation of the rocker of Figure 13 with further schematic diagrams;
- Figure 19 shows the third embodiment of a rocker in perspective partial view;
- FIG. 20 is a representation corresponding to FIG.
- the wheelchair 100 consists essentially of the arranged on the chassis 1 seat 50, the both sides of the chassis 1 arranged drive wheels 21, the front steering wheels 3 and the rear support wheels 7. Since the arrangement and suspension of the wheels 3, 21, 7, left and is symmetrical to the right of the chassis 1, the further description is made only on the basis of a one-sided structure. For the opposite part, this then applies accordingly.
- the front steering wheel 3 is rotatably mounted in a fork 30 about a horizontal axis.
- the fork 30 is rotatably disposed about a vertical axis in the front pivot arm 4.
- the support wheel 7 is arranged on a rear pivot arm 6, which is pivotally mounted on the chassis 1 and is supported on the chassis 1 via a spring / damper unit 9.
- the drive unit 20 driving the drive wheel 21 is connected to the front pivot arm 4 via a spring / damper unit 8.
- Another connection between the drive unit 20 and the front pivot arm 4 via a second spring / damper unit 10 which is pivotally mounted about a first pivot axis A and a second pivot axis B on the chassis 1.
- the front pivot arm 4 is pivotally mounted about a third pivot axis C in the spring / damper unit 10 and the drive unit 20 is pivotally mounted about a fourth pivot axis D in the spring / damper unit 10.
- the steering wheel 3 can be raised or lowered relative to the road F when driving over unevenness, as formed for example by a curb, so that the drive wheel can then lift off the wheel contact surface F (roadway) (compare FIGS ). In this case, attached to the chassis 1 rocker 10 is rotated.
- rocker 10 As the rocker 10 rotates about the pivot axes A and B, it forms a parallelogram through which pivot axes C of the front pivot arm 4 and D drive unit 20 change their vertical and horizontal positions relative to the chassis.
- the rocker 10 is, as Figures 6 to 9 illustrate two bolts 16 ', 17' bolted to the chassis 1, wherein by the first pin 16 ', a first pivot axis A and the second pin 17', a second pivot axis B is formed.
- a front pin 18 ' which is arranged on the rocker 10
- the front pivot arm 4 is pivotally mounted about a third pivot axis C and a pin 19' at the rear end of the rocker 10 is the drive unit 20, on which a pivot arm 23 is formed is mounted pivotably about the pivot axis B.
- Figure 1 1 shows the movements of the pivot axes A, B, C, D which are connected to each other via the drawn parallelogram. Due to the construction, the pivot axes C and D move on a circular path. The radius of the circular path is about 26 mm. The movements are indicated by the arrows Pi, P2, P3, P4 indicated. The indicated fixed bearing 1 'illustrate the fixed connection of the rocker arm 10 on the chassis. 1
- FIG. 11 a shows the situation of the rocker arm 10 in different pivoting positions.
- a middle layer 25 is represented by the middle line construct, by which the pivot axes A, B, C and D are interconnected.
- the connecting lines 26 and 27 connect the various axes at a pivoting of the rocker arm 10 by +/- 10 °. This leads to a displacement of the pivot axes C and D, which are not marked separately.
- 1 b shows an enlarged detail from which it can be seen that the swiveling axis C is swiveled by +/- 10 ° to the positions C 'and C "when swiveling in. This takes place along a circular path with a radius R, which is identical for all swivel axes.
- Figures 15 and 16 show a first embodiment of the rocker 10.
- This consists of the two oppositely arranged yokes 18 and 19, each consisting of two substantially triangular plates, which are connected to each other via a pin 18 ', 19'.
- the pivot axes C and D are formed in the bolts 18 ', 19'.
- the respective parallel opposite triangular plates 18, 19 are each bolted to an upper plate 16 and a lower plate 17.
- the two upper plates 16 are bolted together via a bolt 16 'and the two lower plates 17 via a pin 17'.
- the bolts 16 ', 17' are fixed to the chassis 1 and form the pivot axes A and B from.
- the upper plate 16 and the lower plate 17 are connected via two springs 12 consisting of an elastomeric material, which are formed on a basic body 12 '. These springs 12 act like a torsion spring when pivoting movements are introduced via the front steering wheel 3 into the front pivot arm 4 or via the drive wheel 21 into the drive unit 20.
- FIGS. 17 and 18 show an alternative embodiment of an element 13 made of an elastomeric material in order to realize the torsion spring, the block-shaped base body is provided with slots 13 'or with recesses 13 "The cross-sectional shape of the recesses 13", 13'"is different Variations possible By a suitable selection of the slots 13 'and / or recesses 13 ", 13'" and their cross-sectional shape, the spring rate of the elastomeric element 13 can be adjusted.
- FIGS. 19 and 20 A third alternative for the formation of a torsion spring is shown in FIGS. 19 and 20.
- the upper plate 16 and the lower plate 17 are pivotally mounted in an elastomeric element 1 1, which is surrounded by a housing 40.
- the upper plates 16 and lower plates 17 can rotate about the pivot axes A, B by a predetermined angle.
- the bolts 16 ', 17' are provided with lugs 16 ", 17", which are arranged diametrically opposite one another on the bolt 16 ', 17' and whose outer distance from one another is greater than the width of the housing 40, so that if too high forces are introduced, strike the inner wall of the housing 40 and be blocked in a further pivoting movement.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Automatic Cycles, And Cycles In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016118037.8A DE102016118037A1 (en) | 2016-09-23 | 2016-09-23 | wheelchair |
PCT/EP2017/072489 WO2018054694A1 (en) | 2016-09-23 | 2017-09-07 | Wheelchair |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3515389A1 true EP3515389A1 (en) | 2019-07-31 |
Family
ID=59858711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17765407.6A Pending EP3515389A1 (en) | 2016-09-23 | 2017-09-07 | Wheelchair |
Country Status (4)
Country | Link |
---|---|
US (1) | US11382808B2 (en) |
EP (1) | EP3515389A1 (en) |
DE (1) | DE102016118037A1 (en) |
WO (1) | WO2018054694A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11452648B2 (en) | 2018-04-10 | 2022-09-27 | Velox Manufacturing Inc. | Wheelchair suspension |
CN112312871B (en) * | 2018-07-06 | 2023-08-29 | 优动产品公司 | motor vehicle |
CN108852658B (en) * | 2018-07-17 | 2020-06-30 | 青岛市中医医院 | Chassis structure of wheelchair |
FR3097831B1 (en) * | 2019-06-26 | 2024-04-19 | Ferriol Matrat | all-terrain transport device for a child in a seated position |
US20220047438A1 (en) * | 2020-08-17 | 2022-02-17 | Trimatech S.R.L. | Assistive Wheelchair |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3697638B2 (en) * | 1994-11-18 | 2005-09-21 | ドゥゴンダ レアブ ソシエテ アノニム | Wheelchair for transporting or assisting handicapped persons |
TW365757U (en) * | 1998-05-14 | 1999-08-01 | Chaw Khong Technology Co Ltd | Taken-up wheels of luggage with self-returning function |
US6428022B1 (en) * | 1999-12-13 | 2002-08-06 | Yoshi Namiki | Inline skateboard |
US7234554B2 (en) | 2003-07-02 | 2007-06-26 | Pride Mobility Products Corporation | Rear wheel drive power wheelchair |
US7232008B2 (en) * | 2003-10-08 | 2007-06-19 | Pride Mobility Products Corporation | Active anti-tip wheels for power wheelchair |
US7490683B2 (en) | 2003-12-15 | 2009-02-17 | Schaffner Walter E | Curb-climbing power wheelchair |
TWI255177B (en) | 2005-03-10 | 2006-05-21 | Kwang Yang Motor Co | Chassis mechanism of electric wheelchair |
US7896394B2 (en) * | 2005-08-18 | 2011-03-01 | Sunrise Medical Hhg, Inc. | Midwheel drive wheelchair with independent front and rear suspension |
US7338056B2 (en) * | 2006-04-28 | 2008-03-04 | Razor Usa, Llc | One piece flexible skateboard |
TW200810738A (en) | 2006-08-31 | 2008-03-01 | Kwang Yang Motor Co | Chassis device of electric wheelchair |
US7775307B2 (en) | 2007-04-25 | 2010-08-17 | Merite Health Products Co., Ltd. | Power wheelchair |
US8286738B2 (en) * | 2009-07-14 | 2012-10-16 | Merits Health Products Co., Ltd. | Wheel set structure of an electric wheelchair |
DE202010005233U1 (en) | 2010-04-16 | 2010-09-16 | Freerider Corp., Kang-Shan | Shock absorber arrangement for an electric wheelchair |
WO2013123398A1 (en) | 2012-02-15 | 2013-08-22 | Invacare Corporation | Wheelchair suspension |
DE102015101552B4 (en) | 2015-02-03 | 2017-06-29 | Energy Control Ltd. | Suspension construction of an electric wheelchair |
EP3266433B1 (en) * | 2016-07-07 | 2020-05-06 | Permobil AB | Swing arm linkage for a mid-wheel drive wheelchair |
-
2016
- 2016-09-23 DE DE102016118037.8A patent/DE102016118037A1/en active Pending
-
2017
- 2017-09-07 US US16/335,374 patent/US11382808B2/en active Active
- 2017-09-07 WO PCT/EP2017/072489 patent/WO2018054694A1/en unknown
- 2017-09-07 EP EP17765407.6A patent/EP3515389A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US20210282987A1 (en) | 2021-09-16 |
WO2018054694A1 (en) | 2018-03-29 |
DE102016118037A1 (en) | 2018-03-29 |
US11382808B2 (en) | 2022-07-12 |
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