SE504150C3 - Wheelchair chassis, for riding on uneven ground - Google Patents
Wheelchair chassis, for riding on uneven groundInfo
- Publication number
- SE504150C3 SE504150C3 SE9502358A SE9502358A SE504150C3 SE 504150 C3 SE504150 C3 SE 504150C3 SE 9502358 A SE9502358 A SE 9502358A SE 9502358 A SE9502358 A SE 9502358A SE 504150 C3 SE504150 C3 SE 504150C3
- Authority
- SE
- Sweden
- Prior art keywords
- chassis
- wheels
- frame
- longitudinal
- side beams
- Prior art date
Links
- 210000001503 Joints Anatomy 0.000 claims description 2
- 241000219492 Quercus Species 0.000 claims 1
- 235000016976 Quercus macrolepis Nutrition 0.000 claims 1
- 230000000875 corresponding Effects 0.000 description 3
- 230000037250 Clearance Effects 0.000 description 1
- 230000035512 clearance Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- A61G2005/1078—
-
- 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
-
- 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
Description
10 '-21 _ " 504 150 figurbladet visade figuren avser ett rullstolschassi sett snett ovanifrån. Chassit innefattar en T-formig ram 1 uppvisande en tvärbalk 1.1 och en längsbalk 1.2, varvid den senare sträcker sig i chassits längdriktning, dvs huvudsakliga åkriktning, och tvärbalken 1.1 vinkelrätt 1 mot denna, dvs mellan chassits sidor. Tvärbalken 1.1 1 uppbär vid vardera av sina fria ändar en sidobalk 2 som sträcker sig vinkelrätt mot tvärbalken 1.1 och som är vridbart lagrad vid tvärbalken 1.1 i en balklagring 2.1 belägen ungefär vid mitten av respektive sidobalk 2. 10 '-21 _ " 504 150 the figure sheet shown the figure refers to a wheelchair chassis seen obliquely from above. The chassis comprises a T-shaped frame 1 having a cross beam 1.1 and a longitudinal beam 1.2, wherein the latter extends in the longitudinal direction of the chassis, ie main direction of travel, and the crossbar 1.1 perpendicular 1 against this, ie between the sides of the chassis. Crossbar 1.1 1 carries at each of its free ends a side beam 2 which extends perpendicular to the crossbeam 1.1 and which is rotatably mounted at the crossbeam 1.1 in a beam bearing 2.1 located approximately at the center of the respective sidebar 2.
Balklagringarna 2.1 är anordnade utmed en gemensam vrid- axel som sträcker sig i tvärbalkens 1.1 längdriktning. Då tvärbalken 1.1 normalt befinner sig i ett horisontellt läge kan respektive sidobalk 2 svänga i ett vertikalplan kring tvärbalken 1.1. Respektive sidobalk 2 är försedd med ett hjul 2.2 med fast orienterad vridaxel 2.3, och ett pivothjul 2.U, dvs ett hjul med en vridaxel som kan svänga kring en vertikal pivot 2.5. Ramen 1 uppbär vidare en bärpelare 3 som är anordnad vid längsbalkens 1.2 in- fästning i tvärbalken 1.1 och som är avsedd att bära upp rullstolens sits, ryggstöd, fotplatta och liknande, ej visade på figuren.The beam bearings 2.1 are arranged along a common pivot axis extending in the longitudinal direction of the crossbeam 1.1. Then the crossbeam 1.1 is normally located in a horizontal position, the respective side beam 2 can pivot in a vertical plane around the crossbar 1.1. Respective side beam 2 is provided with a wheel 2.2 with fixed oriented axis of rotation 2.3, and a pivot wheel 2.U, ie a wheel with a rotating shaft that can turn around a vertical pivot 2.5. Frame 1 carries on a support column 3 which is arranged at the inlet of the longitudinal beam 1.2 fastening in the crossbeam 1.1 and which is intended to support wheelchair seat, backrest, footplate and the like, no shown in the figure.
Sidobalkarna 2 är förbundna vid sina ändar vid hjulen 2.2 via ett ok U, som är anordnat vid den fria änden på längsbalken 1.2 till ramen 1, och vridbart upphängt i en oklagring U.1 som sträcker sig i längsbal- kens 1.2 längdriktning. Okets U fria ändar är ledat an- slutna till respektive sidobalk 2 via länkar U.2, som dels är ledat förbundna med ett fäste 2.6 på respektive sidobalk 2, dels ledat förbundna med respektive ände på oket U. Härigenom tillåts att sidobalkarna 2 kan svänga kring balklagringarna 2.1 under det att ramen 1 bärs upp dels direkt av sidobalkarna 2, dels indirekt via oket Ä och länkarna U.2.The side beams 2 are connected at their ends at the wheels 2.2 via a yoke U, which is arranged at the free one the end of the longitudinal beam 1.2 to the frame 1, and rotatable suspended in a U.1 bearing extending in the longitudinal kens 1.2 longitudinal direction. The free ends of the yoke U are articulated closed to the respective sidebar 2 via links U.2, which secondly, the joints are connected with a bracket 2.6 on the respective side beam 2, partly articulated connected to the respective end of yoke U. This allows the side beams 2 to pivot around the beam bearings 2.1 while the frame 1 is being supported partly directly by the side beams 2, partly indirectly via the yoke Ä and the links U.2.
Om en rullstol försedd med ett chassi som visas på figuren under åkrörelse stöter på ett hinder med ett hjul, t ex ett av de två hjulen 2.2, strävar detta hjul 504 150 att vrida motsvarande sidobalk 2 så att hjulet 2.2 höjs.If a wheelchair equipped with a chassis shown in the figure while moving encounters an obstacle with a wheel, eg one of the two wheels 2.2, this wheel strives 504 150 to turn the corresponding side beam 2 so that the wheel 2.2 is raised.
Motsvarande pivothjul 2.M kan däremot inte sänkas i samma usträckning vilket får till följd att ramen 1 lyfts vid den påverkade sidobalken 2. Samtidigt lyfts även den ände på oket U som är ansluten till den påverkade sidobalken 2 vilket även leder till en lyftning av den lagerupphängda änden på längsbalken 1.2. Den resulterande rörelsen som uppstår vid bärpelaren 3, dvs vid rullstolens sits, reduceras dels i förhållande till balklagringens 2.1 läge på den påverkade sidobalken 2, dels av avståndet mellan sidobalkarna 2, dvs avståndet mellan hjulens 2.2, 2.U kontaktpunkter mot marken.The corresponding pivot wheel 2.M, on the other hand, cannot be lowered into the same stretching, which results in the frame 1 being lifted at the affected side beam 2. At the same time lift the end on the yoke U which is connected to the affected side beam 2 which also leads to a lifting of the bearing suspension the end of the longitudinal beam 1.2. The resulting movement that occurs at the support pillar 3, ie at the seat of the wheelchair, reduced in relation to the position of the beam bearing 2.1 on the affected side beam 2, partly by the distance between the side beams 2, ie the distance between the wheels 2.2, 2.U contact points towards the ground.
I ett exempel där hjulens 2.2, 2.U kontaktpunk- ter mot marken befinner sig i var sitt hörn av en rek- tangel och tvärbalkens 1.1 balklagring 2.1 vid mitten av respektive sidobalk 2 samt bärpelaren 3 placerad mitt på tvärbalken 1.1 höjs bärpelaren 3 en viss del av en ini- tial höjning av ett hjul 2.2 samt erhåller en motsvarande lutning. Om ett hjul 2.2 höjs sträckan "h" höjs motsva- rande sidobalkslagring 2.1 sträckan h/2 och bärpelaren 3 sträckan h/Ä. Samtidigt höjs oklagringen sträckan h/2, vilket innebär att längsbalkens fria ände höjts sträckan h/2 och dess ände vid bärpelaren 3 sträckan h/4.In an example where the 2.2, 2.U wheel contact points against the ground are located in separate corners of a tangel and cross beam 1.1 beam bearing 2.1 at the center of respective side beam 2 and the support column 3 placed in the middle crossbar 1.1, the support column 3 is raised a certain part of an initial tial raising of a wheel 2.2 and receives a corresponding inclination. If a wheel 2.2 is raised, the distance "h" is raised correspondingly side beam storage 2.1 the section h / 2 and the supporting column 3 the distance h / Ä. At the same time, the clearance increases the distance h / 2, which means that the free end of the longitudinal beam is increased h / 2 and its end at the support column 3 the distance h / 4.
Bärpelarens 3 höjning blir därmed endast hälften av vad den som uppstår vid ett konventionellt rullstolsohassi där båda framhjulen (eller båda bakhjulen) lyfts samtidigt när ett av hjulen stöter på en upphöjning i marken.The increase in the support column 3 is thus only half of what that which occurs in a conventional wheelchair sohassi where both front wheels (or both rear wheels) are raised at the same time when one of the wheels encounters an elevation in the ground.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9502358A SE9502358L (en) | 1995-06-29 | 1995-06-29 | Chassis for wheelchairs, for riding on uneven ground |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9502358A SE9502358L (en) | 1995-06-29 | 1995-06-29 | Chassis for wheelchairs, for riding on uneven ground |
Publications (4)
Publication Number | Publication Date |
---|---|
SE9502358D0 SE9502358D0 (en) | 1995-06-29 |
SE504150C2 SE504150C2 (en) | 1996-11-25 |
SE504150C3 true SE504150C3 (en) | 1996-11-25 |
SE9502358L SE9502358L (en) | 1996-11-25 |
Family
ID=20398786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9502358A SE9502358L (en) | 1995-06-29 | 1995-06-29 | Chassis for wheelchairs, for riding on uneven ground |
Country Status (1)
Country | Link |
---|---|
SE (1) | SE9502358L (en) |
-
1995
- 1995-06-29 SE SE9502358A patent/SE9502358L/en not_active IP Right Cessation
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