JP2008006190A - Caster fitting structure for wheelchair - Google Patents

Caster fitting structure for wheelchair Download PDF

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JP2008006190A
JP2008006190A JP2006181637A JP2006181637A JP2008006190A JP 2008006190 A JP2008006190 A JP 2008006190A JP 2006181637 A JP2006181637 A JP 2006181637A JP 2006181637 A JP2006181637 A JP 2006181637A JP 2008006190 A JP2008006190 A JP 2008006190A
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caster
wheelchair
damper
dampers
nut
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JP4857038B2 (en
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Nagayoshi Sato
永佳 佐藤
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MIKI KOGYOSHO KK
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MIKI KOGYOSHO KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a caster fitting structure for a wheelchair alleviating vibrations or shocks applied to a person on the wheelchair when traveling. <P>SOLUTION: The structure comprises one or more than one damper 21, 22 pressed into a caster fitting tube body 16 fixed on the wheelchair main body, a caster axial rod 19 provided with a thread groove 19A on its upper end at least that is inserted into the dampers 21, 22, and a damper fixing nut 26 screwed in the caster axial rod 19 from the upper end. Fastening the upper end of the dampers 21, 22 with the nut 26 can fix the dampers 21, 22 in the caster fitting tube body 16, and a fork arm 17 to support a caster wheel 38 is supported on a lower end of the caster axial rod 19 so as to be rotatable to the right and left. The dampers 21, 22 comprises inner tubes 21A, 22A, outer tubes 21B, 22B, and sealing sleeves 23, 24 provided between the inner tubes 21A, 22A and the outer tubes 21B, 22B. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は例えば車椅子のキャスター取付け構造に関する。   The present invention relates to a wheelchair caster mounting structure, for example.

従来のキャスター取付け構造は図７および図８に示すように車椅子本体のパイプ状の前脚柱部５のキャスター取付筒体１６の内側に六角座４０から上方に延設されている軸棒４１を挿入し、該軸棒４１にはゴムスリーブ４２Ａ，４３Ａおよびワッシャ４４，４５，４６を外側嵌合し、該軸棒４１の上端螺溝部４１Ａにはナット４７を螺着して該ゴムスリーブ４２Ａ，４３Ａを該ナット４７と該六角座４０より挟圧して該ゴムスリーブ４２Ａ，４３Ａを径方向に拡張させることによって該前脚柱部５のパイプ内に固定し、該六角座４０から下方に延設されている軸棒４１の下端螺溝部４１Ａにワッシャ４７Ａを介してナット４７によりフォーク４８の基端部４８Ａを支持させる構造である。   In the conventional caster mounting structure, as shown in FIGS. 7 and 8, a shaft bar 41 extending upward from the hexagonal seat 40 is inserted into the caster mounting cylinder 16 of the pipe-like front leg column portion 5 of the wheelchair body. The shaft rod 41 is fitted with rubber sleeves 42A, 43A and washers 44, 45, 46, and a nut 47 is screwed into the upper end screw groove portion 41A of the shaft rod 41 so that the rubber sleeves 42A, 43A are fitted. The rubber sleeves 42A and 43A are expanded in the radial direction by clamping the nut 47 and the hexagonal seat 40 to be fixed in the pipe of the front leg column portion 5, and are extended downward from the hexagonal seat 40. The base end portion 48A of the fork 48 is supported by the nut 47 via the washer 47A in the lower end screw groove portion 41A of the shaft rod 41.

この構成では六角座４０を回して軸棒４１を回転させると、該ゴムスリーブ４２Ａ，４３Ａの外周面はキャスター取付筒体１６の内周面との摩擦により回転せず、さらにナット４７も該ゴムスリーブ４３Ａとの摩擦により回転しないので、ナット４７は該六角座４０の回転につれて螺入していく。該ナット４７が螺入していくと、該ゴムスリーブ４２Ａ，４３Ａはナット４７と六角座４０とにより挟圧され径方向に膨張して前脚柱部５の該キャスター取付筒体１６の内周面と該軸棒４１の外周面とに圧接する。したがって軸棒４１は前脚柱部５内に固定される。   In this configuration, when the hexagonal seat 40 is rotated to rotate the shaft 41, the outer peripheral surfaces of the rubber sleeves 42A and 43A do not rotate due to friction with the inner peripheral surface of the caster mounting cylinder 16, and the nut 47 also has the rubber. Since the nut 47 does not rotate due to friction with the sleeve 43A, the nut 47 is screwed in as the hexagonal seat 40 rotates. When the nut 47 is screwed in, the rubber sleeves 42A and 43A are pinched by the nut 47 and the hexagonal seat 40 and expand in the radial direction, so that the inner peripheral surface of the caster mounting cylinder 16 of the front leg column portion 5 is expanded. And the outer peripheral surface of the shaft rod 41. Therefore, the shaft bar 41 is fixed in the front leg column portion 5.

特開２００３−１３６９０６号公報JP 2003-136906 A

上記従来構成では、該ゴムスリーブ４２Ａ，４３Ａが該キャスター取付筒体１６の内周面と該軸棒４１の外周面とに圧接しているから、軸方向および径方向の変形は殆ど抑制され、したがって該軸棒４１は該キャスター取付筒体１６に対して軸方向および径方向の動きを緊縛する手段が採用されているため、車椅子走行時における衝撃吸収が殆ど不可能な状態となっていた。   In the above conventional configuration, since the rubber sleeves 42A and 43A are in pressure contact with the inner peripheral surface of the caster mounting cylinder 16 and the outer peripheral surface of the shaft rod 41, deformation in the axial direction and the radial direction is hardly suppressed. Accordingly, since the shaft bar 41 employs means for binding the axial movement and the radial movement with respect to the caster mounting cylinder 16, the shock absorption during the wheelchair traveling is almost impossible.

本発明は上記従来の課題を解決するための手段として、車椅子本体２に固定されているキャスター取付筒体１６内に一個または二個以上のダンパー２１，２２を圧入し、該ダンパー２１，２２の内側に少なくとも上端部にねじ溝１９Ａを設けたキャスター軸棒１９を挿入し、該キャスター軸棒１９上端からダンパー固定ナット２６を螺入して該ダンパー２１，２２上端を該ナット２６で締付けることによって該ダンパー２１，２２を該キャスター取付筒体１６内に固定し、該キャスター軸棒１９下端にはキャスター車輪３８を支持するフォーク１７を左右回動自在に支持した構成であって、該ダンパー２１，２２は内筒２１Ａ，２２Ａと、外筒２１Ｂ，２２Ｂと、該内筒２１Ａ，２２Ａと該外筒２１Ｂ，２２Ｂとの間に介在しているゴムスリーブ２３，２４とからなる車椅子１のキャスター取付け構造を提供するものである。
該ゴムスリーブ２３，２４の上面および／または下面には、凹溝２３Ａ，２４Ａが周設されていることが望ましい。 As a means for solving the above-described conventional problems, the present invention press-fits one or two or more dampers 21 and 22 into a caster mounting cylinder 16 fixed to the wheelchair body 2, By inserting a caster shaft rod 19 provided with a thread groove 19A at least at the upper end on the inner side, screwing a damper fixing nut 26 from the upper end of the caster shaft rod 19, and tightening the upper ends of the dampers 21, 22 with the nut 26 The dampers 21 and 22 are fixed in the caster mounting cylinder 16, and a fork 17 for supporting a caster wheel 38 is supported at the lower end of the caster shaft rod 19 so as to be capable of rotating left and right. Reference numeral 22 denotes an inner cylinder 21A, 22A, an outer cylinder 21B, 22B, and a rubber sleeve interposed between the inner cylinder 21A, 22A and the outer cylinder 21B, 22B. There is provided a caster mounting structure of the wheelchair 1 comprising a blanking 23 and 24.
It is desirable that concave grooves 23A, 24A are provided around the upper and / or lower surfaces of the rubber sleeves 23, 24.

〔作用〕
本発明にあっては、内筒２１Ａ，２２Ａと、外筒２１Ｂ，２２Ｂとの間にゴムスリーブ２３，２４を介在させているから、該キャスター軸棒１９の上端から該ダンパー固定ナット２６を螺入して該ダンパー２１，２２上端を該ダンパー固定ナット２６で締付けても、該ダンパー２１，２２のゴムスリーブ２３，２４が該ナット２６によって挟圧されることは、該内筒２１Ａ，２２Ａと、該外筒２１Ｂ，２２Ｂとによって阻止される。したがって該ゴムスリーブ２３，２４はキャスター取付筒体１６内周面と該キャスター軸棒１９外周面とに圧接していないから、該ゴムスリーブ２３，２４は軸方向および径方向に変形することが可能であり、該軸棒１９は該キャスター取付筒体１６に対して軸方向にも径方向にも動くことができる。 [Action]
In the present invention, since the rubber sleeves 23, 24 are interposed between the inner cylinders 21A, 22A and the outer cylinders 21B, 22B, the damper fixing nut 26 is screwed from the upper end of the caster shaft rod 19. Even when the upper ends of the dampers 21 and 22 are tightened with the damper fixing nut 26, the rubber sleeves 23 and 24 of the dampers 21 and 22 are clamped by the nut 26. Are blocked by the outer cylinders 21B and 22B. Therefore, since the rubber sleeves 23 and 24 are not pressed against the inner peripheral surface of the caster mounting cylinder 16 and the outer peripheral surface of the caster shaft rod 19, the rubber sleeves 23 and 24 can be deformed in the axial direction and the radial direction. The shaft bar 19 can move in the axial direction and the radial direction with respect to the caster mounting cylinder 16.

〔効果〕
したがって本発明にあっては、車椅子走行時における震動や衝撃の吸収が可能となり、車椅子を円滑に走行させることが出来、車椅子に乗っている人に対しても震動や衝撃が大巾に緩和されるから、車椅子の使用感が格段に向上する。 〔effect〕
Therefore, according to the present invention, vibrations and shocks can be absorbed when traveling in a wheelchair, the wheelchair can be smoothly traveled, and vibrations and shocks can be greatly reduced even for a person riding in a wheelchair. Therefore, the feeling of use of the wheelchair is greatly improved.

本発明を図１〜図６に示す一実施例によって説明すれば、車椅子１の本体２は左右一対の側枠３，３からなり該側枠３，３は座梁部４、前後脚柱部５，６、アームレスト部７、背柱部８、フットレスト支持梁９、および下梁１０からなり、該側枠３，３は前後一対のＸ枠１１，１２によって結合されており、該背柱部８の上端は後方に弯曲されてグリップ１４が取付けられている。   The present invention will be described with reference to an embodiment shown in FIGS. 1 to 6. The main body 2 of the wheelchair 1 is composed of a pair of left and right side frames 3, 3. 5, 6, armrest portion 7, back column portion 8, footrest support beam 9, and lower beam 10, and the side frames 3, 3 are connected by a pair of front and rear X frames 11, 12. The upper end of 8 is bent rearward and a grip 14 is attached.

該側枠３の後脚柱部６には図１および図２に示す角筒状の車輪取付部１３が溶接されており、該車輪取付部１３には主車輪１５が回転自在に取付けられている。   1 and 2 is welded to the rear leg column portion 6 of the side frame 3, and a main wheel 15 is rotatably attached to the wheel attachment portion 13. Yes.

該側枠３前脚柱部５には図３に示すキャスター取付筒体１６が溶接されている。該取付筒体１６内には下端からはフォーク１７の基端部１７Ａから六角座１８を介して立設されている軸棒１９が挿入され、該軸棒１９にはワッシャ２０、上下一対のダンパー２１，２２が外側嵌合されている。   A caster mounting cylinder 16 shown in FIG. 3 is welded to the front frame 5 of the side frame 3. A shaft rod 19 erected from the base end portion 17A of the fork 17 via a hexagonal seat 18 is inserted into the mounting cylinder 16 from the lower end. The shaft rod 19 has a washer 20 and a pair of upper and lower dampers. 21 and 22 are fitted outside.

該ダンパー２１，２２は内筒２１Ａ，２２Ａと、外筒２１Ｂ，２２Ｂと、その間に介在しているゴムスリーブ２３，２４とからなり、該ゴムスリーブ２３，２４は該内筒２１Ａ，２２Ａの外周および該外筒２１Ｂ，２２Ｂ内周とに接着剤によって接着されることによって、該内筒２１Ａ，２２Ａおよび外筒２１Ｂ，２２Ｂと一体化されている。更に該ゴムスリーブ２３，２４の上下面には凹溝２３Ａ，２４Ａが周設されている。そして該ダンパー２１，２２は該キャスター取付筒体１６の内側に密接嵌合挿入されており、該上下のダンパー２１，２２は該内筒２１Ａ，２２Ａを相互当接した状態とされている。該下側のダンパー２１は下端をワッシャー２０に当接し、上端は上下ゴムスリーブ２３，２４の外筒２１Ｂ，２２Ｂの間隙にキャスター取付筒体１６の外側から螺着されているスペーサーねじ２５を挿入することによって上下ダンパー２１，２２は上下方向の動きを規制され、また該上側のダンパー２２は該軸棒１９の上端部に形成されているねじ溝１９Ａにダンパー固定ナット２６を螺着し、該ナット２６を該ダンパー２２の内筒２２Ａの上端に当接して締付けることによって固定される。   The dampers 21 and 22 are composed of inner cylinders 21A and 22A, outer cylinders 21B and 22B, and rubber sleeves 23 and 24 interposed therebetween, and the rubber sleeves 23 and 24 are outer circumferences of the inner cylinders 21A and 22A. The inner cylinders 21A and 22A and the outer cylinders 21B and 22B are integrated with each other by being bonded to the inner periphery of the outer cylinders 21B and 22B with an adhesive. Further, recessed grooves 23A and 24A are provided on the upper and lower surfaces of the rubber sleeves 23 and 24, respectively. The dampers 21 and 22 are closely fitted and inserted inside the caster mounting cylinder 16, and the upper and lower dampers 21 and 22 are in contact with the inner cylinders 21A and 22A. The lower damper 21 is in contact with the washer 20 at the lower end, and a spacer screw 25 screwed from the outside of the caster mounting cylinder 16 is inserted into the gap between the outer cylinders 21B and 22B of the upper and lower rubber sleeves 23 and 24 at the upper end. As a result, the vertical dampers 21 and 22 are restricted from moving in the vertical direction, and the upper damper 22 is screwed with a damper fixing nut 26 in a screw groove 19A formed in the upper end portion of the shaft rod 19. The nut 26 is fixed by coming into contact with the upper end of the inner cylinder 22A of the damper 22 and tightening.

この場合、前記したように該下側のダンパー２１の内筒２１Ａの上端は該上側のダンパー２２の内筒２２Ａ下端に当接しているから、該上側のダンパー２２をナット２６で締付け固定すれば、該上側のダンパー２２を介して該下側のダンパー２１も固定される。   In this case, as described above, since the upper end of the inner cylinder 21A of the lower damper 21 is in contact with the lower end of the inner cylinder 22A of the upper damper 22, if the upper damper 22 is fastened and fixed with the nut 26, The lower damper 21 is also fixed via the upper damper 22.

該キャスター取付筒体１６の上端にはスリーブ２７Ａを有するキャップ２７が嵌着されて、該キャップ２７は該スリーブ２７Ａを該キャスター取付筒体１６の外側から螺入されるキャップ取付ねじ２８を締付けることによって該キャスター取付筒体１６上端に固定される。この状態で該キャップ２７のスリーブ２７Ａの下端が上側のダンパー２２の外筒２２Ｂに当接する。   A cap 27 having a sleeve 27 </ b> A is fitted to the upper end of the caster mounting cylinder 16, and the cap 27 tightens a cap mounting screw 28 into which the sleeve 27 </ b> A is screwed from the outside of the caster mounting cylinder 16. Thus, the caster mounting cylinder 16 is fixed to the upper end. In this state, the lower end of the sleeve 27 </ b> A of the cap 27 contacts the outer cylinder 22 </ b> B of the upper damper 22.

該軸棒１９の６角座１８の下面からは図５に示すように下側軸棒２９が延設されており、該下側軸棒２９はフォーク１７の基端部１７Ａに内接されている上側ベアリング３０、中間リング３２、下側ベアリング３１を貫通し、下端螺溝部２９Ａにはナット３３が螺着締付され、このようにして該フォーク１７は該下側軸棒２９に左右回動可能に取り付けられている。   As shown in FIG. 5, a lower shaft rod 29 extends from the lower surface of the hexagonal seat 18 of the shaft rod 19, and the lower shaft rod 29 is inscribed in the base end portion 17 </ b> A of the fork 17. The upper bearing 30, the intermediate ring 32, and the lower bearing 31 are penetrated, and the nut 33 is screwed and fastened to the lower end thread groove portion 29 </ b> A. In this way, the fork 17 rotates left and right with respect to the lower shaft rod 29. It is attached as possible.

該フォーク１７には図６に示すようにキャスター車輪取付け用の軸孔３４Ａ，３４Ｂ，３４Ｃの複数個（３個）が縦方向に設けられており、該軸孔３４Ａ，３４Ｂ，３４Ｃの一つを選び、主車輪１５と同様なカムレバー３６付き車軸３５およびプレス座金３９と、該車軸３５の先端螺溝部３５Ａに螺着されるナット３７によってキャスター車輪３８を上下取付け位置調節可能に取り付ける。   As shown in FIG. 6, the fork 17 is provided with a plurality of (three) shaft holes 34A, 34B, 34C for attaching caster wheels in the vertical direction, and one of the shaft holes 34A, 34B, 34C. The caster wheel 38 is mounted so that its vertical mounting position can be adjusted by an axle 35 with a cam lever 36 and a press washer 39 similar to those of the main wheel 15 and a nut 37 screwed into the tip screw groove 35A of the axle 35.

上記構成においては、ナット２６の締付け力はダンパー２１，２２の内筒２１Ａ，２２Ａによってゴムスリーブ２３，２４に及ぶのを阻止され、したがって該ゴムスリーブ２３，２４は該ナット２６によって挟圧されないので、図４矢印イ、ロに示すように軸方向および径方向に変形可能である。かくして車椅子走行時の震動や衝撃は該ゴムスリーブ２３，２４によって吸収されてしまうので、車椅子に乗っている人に対しても、このような震動や衝撃は大巾に緩和される。   In the above configuration, the tightening force of the nut 26 is prevented from reaching the rubber sleeves 23 and 24 by the inner cylinders 21A and 22A of the dampers 21 and 22, and therefore the rubber sleeves 23 and 24 are not pinched by the nut 26. 4 can be deformed in the axial direction and the radial direction as shown by arrows a and b in FIG. Thus, the vibrations and impacts during running of the wheelchair are absorbed by the rubber sleeves 23 and 24, so that such vibrations and impacts are greatly relieved even for the person on the wheelchair.

本実施例ではゴムスリーブ２３，２４の上下面に凹溝２３Ａ，２４Ａを形成したから、ゴムスリーブ２３，２４の軸方向および径方向の変形は更に容易になるが、該凹溝は省略してもよい。
またダンパーは一個のみ使用してもよく、更に二個以上使用してもよい。 In this embodiment, since the grooves 23A and 24A are formed on the upper and lower surfaces of the rubber sleeves 23 and 24, the deformation of the rubber sleeves 23 and 24 in the axial direction and the radial direction is further facilitated, but the grooves are omitted. Also good.
Moreover, only one damper may be used, and two or more dampers may be used.

本発明の車椅子は乗っている人に対する走行時の震動や衝撃が大巾に緩和され、優れた乗り心地を与えるから、産業上利用可能である。   The wheelchair of the present invention can be industrially used because vibration and shock during traveling for a person who rides it are greatly reduced, and it provides an excellent riding comfort.

図１〜図６は本発明の実施例を示すものである。
車椅子側面図 車椅子正面図 キャスター取付け部分説明分解斜視図 キャスター取付筒体の側断面図 フォーク基端部部分断面図 キャスター車輪取付け状態正面図 従来例のキャスター取付け構造分解斜視図 従来例のキャスター取付け構造説明断面図 1 to 6 show an embodiment of the present invention.
Wheelchair side view Wheelchair front view Caster mounting part explanation exploded perspective view Side sectional view of caster mounting cylinder Fork base end partial sectional view Caster wheel mounting front view Conventional perspective caster mounting structure exploded perspective view Cross-sectional view of conventional caster mounting structure

符号の説明Explanation of symbols

１ 車椅子
２ 本体
１６ キャスター取付筒体
１７ フォーク
１７Ａ 基端部
１９ （キャスター）軸棒
１９Ａ ねじ溝
２１，２２ ダンパー
２１Ａ，２２Ａ 内筒
２１Ｂ，２２Ｂ 外筒
２３，２４ ゴムスリーブ
２３Ａ，２４Ａ 凹溝
２５ スペーサー
２６ ダンパー固定ナット DESCRIPTION OF SYMBOLS 1 Wheelchair 2 Main body 16 Caster mounting cylinder 17 Fork 17A Base end 19 (Caster) Shaft rod 19A Screw groove 21, 22 Damper 21A, 22A Inner cylinder 21B, 22B Outer cylinder 23, 24 Rubber sleeve 23A, 24A Concave groove 25 Spacer 26 Damper fixing nut

Claims (2)

車椅子本体に固定されているキャスター取付筒体内に一個または二個以上のダンパーを圧入し、該ダンパーの内側に少なくとも上端部にねじ溝を設けたキャスター軸棒を挿入し、該キャスター軸棒上端からダンパー固定ナットを螺入して該ダンパー上端を該ナットで締付けることによって該ダンパーを該キャスター取付筒体内に固定し、該キャスター軸棒下端にはキャスター車輪を支持するフォークを左右回動自在に支持した構成であって、該ダンパーは内筒と、外筒と、該内筒と該外筒との間に介在しているゴムスリーブとからなることを特徴とする車椅子のキャスター取付け構造。   One or more dampers are press-fitted into a caster mounting cylinder fixed to the wheelchair body, and a caster shaft bar having a thread groove at least at the upper end is inserted inside the damper, and the caster shaft bar is inserted from the upper end of the caster shaft bar. A damper fixing nut is screwed in and the upper end of the damper is tightened with the nut to fix the damper in the caster mounting cylinder, and a fork for supporting a caster wheel is supported at the lower end of the caster shaft rod so as to be rotatable left and right. A wheelchair caster mounting structure, characterized in that the damper comprises an inner cylinder, an outer cylinder, and a rubber sleeve interposed between the inner cylinder and the outer cylinder. 該ゴムスリーブの上面および／または下面には、凹溝が周設されている請求項１に記載の車椅子のキャスター取付け構造。   The wheelchair caster mounting structure according to claim 1, wherein a concave groove is provided around an upper surface and / or a lower surface of the rubber sleeve.
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JP2010149653A (en) * 2008-12-25 2010-07-08 Matsunaga Seisakusho:Kk Shock absorbing caster
CN101870103A (en) * 2010-06-07 2010-10-27 华东理工大学 Flaw detection robot for automatic collimation and automatic steering in circular pipeline
DE102010017349A1 (en) * 2010-06-14 2011-12-15 Sunrise Medical Gmbh & Co. Kg Height-adjustable wheel suspension device and wheelchair with such a device
JP2013173414A (en) * 2012-02-24 2013-09-05 Yuei Caster Co Ltd Wheel installing structure
WO2020036262A1 (en) * 2018-08-14 2020-02-20 삼성메디슨 주식회사 Caster unit and medical apparatus including same
CN111655509A (en) * 2018-01-25 2020-09-11 坦特两合公司 Roller and additional damping element for a roller
CN112923166A (en) * 2021-02-05 2021-06-08 杭州电子科技大学 Automatic direction adjusting device and method suitable for pipeline inspection robot
US11292294B1 (en) * 2020-10-30 2022-04-05 Bad Boy Mowers, Llc Zero-turn-radius riding mower caster wheel stabilizer

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KR101447222B1 (en) 2013-03-05 2014-10-07 이재백 Safety Wheelchair Attached Auxiliary Wheel
WO2016059659A1 (en) * 2014-10-15 2016-04-21 株式会社松永製作所 Caster and wheelchair

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010149653A (en) * 2008-12-25 2010-07-08 Matsunaga Seisakusho:Kk Shock absorbing caster
CN101870103A (en) * 2010-06-07 2010-10-27 华东理工大学 Flaw detection robot for automatic collimation and automatic steering in circular pipeline
DE102010017349A1 (en) * 2010-06-14 2011-12-15 Sunrise Medical Gmbh & Co. Kg Height-adjustable wheel suspension device and wheelchair with such a device
DE102010017349B4 (en) * 2010-06-14 2012-05-16 Sunrise Medical Gmbh & Co. Kg Height-adjustable wheel suspension device and wheelchair with such a device
EP2394622A3 (en) * 2010-06-14 2012-12-19 Sunrise Medical GmbH & Co. KG Wheel suspension device and wheelchair with same
JP2013173414A (en) * 2012-02-24 2013-09-05 Yuei Caster Co Ltd Wheel installing structure
CN111655509B (en) * 2018-01-25 2024-01-09 坦特两合公司 Roller and additional shock absorber for roller
CN111655509A (en) * 2018-01-25 2020-09-11 坦特两合公司 Roller and additional damping element for a roller
WO2020036262A1 (en) * 2018-08-14 2020-02-20 삼성메디슨 주식회사 Caster unit and medical apparatus including same
US20210213777A1 (en) * 2018-08-14 2021-07-15 Samsung Medison Co., Ltd. Caster unit and medical apparatus including same
EP3838616A4 (en) * 2018-08-14 2022-10-26 Samsung Medison Co., Ltd. Caster unit and medical apparatus including same
US11292294B1 (en) * 2020-10-30 2022-04-05 Bad Boy Mowers, Llc Zero-turn-radius riding mower caster wheel stabilizer
CN112923166A (en) * 2021-02-05 2021-06-08 杭州电子科技大学 Automatic direction adjusting device and method suitable for pipeline inspection robot

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