IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0280426
(2011-10-25)
|
등록번호 |
US-8365354
(2013-02-05)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
7 |
초록
▼
A castor includes a wheel frame, a roller, an elastic locating plate, a mandrel, a locating disk, a braking disk, a mounting tube, an elastic member, a control bar, two screw members, an adjusting member, and a connecting unit. Thus, the distance between the braking disk and the roller can be adjust
A castor includes a wheel frame, a roller, an elastic locating plate, a mandrel, a locating disk, a braking disk, a mounting tube, an elastic member, a control bar, two screw members, an adjusting member, and a connecting unit. Thus, the distance between the braking disk and the roller can be adjusted easily and quickly according to the user's requirement, thereby facilitating the user braking the roller. In addition, when the wall thickness of the roller is reduced due to rubbing or wearing, the distance between the braking disk and the roller can be adjusted to fit the wall thickness of the roller, thereby keeping the braking effect of the braking disk to the optimum.
대표청구항
▼
1. A castor, comprising a wheel frame, an elastic locating plate, a mandrel, a mounting tube, an elastic member, a control bar, two screw members, an adjusting member, and a connecting unit, wherein: the wheel frame has a first side provided with a mounting space receiving a roller and has a second
1. A castor, comprising a wheel frame, an elastic locating plate, a mandrel, a mounting tube, an elastic member, a control bar, two screw members, an adjusting member, and a connecting unit, wherein: the wheel frame has a first side provided with a mounting space receiving a roller and has a second side having a top provided with a mounting post;the mounting post has an outer wall provided with an annular limit groove which has two opposite sides each provided with a screw bore;the mounting post has an inner wall provided with a shaft hole;the mounting post has two opposite sides each provided with a threaded mounting hole connected to the shaft hole;the elastic locating plate is mounted in the mounting space of the wheel frame and is located adjacent to the shaft hole of the mounting post;the mandrel is movably mounted in the shaft hole of the mounting post;the mandrel has a lower end provided with a non-circular mounting section receiving a locating disk and a braking disk;the mandrel has a mediate portion provided with a stop shoulder located above the non-circular mounting section;the mandrel has an upper end provided with a threaded hole;the mounting tube is mounted in a gap defined between the upper end of the mandrel and the shaft hole of the mounting post;the elastic member is mounted on the upper end of the mandrel;the control bar is mounted on the mounting post and includes two outer shells which are combined with each other;the control bar has an inner wall having an upper end provided with a receiving chamber, a lower end provided with a cylindrical mounting chamber and a mediate portion provided with a receiving recess connected between the receiving chamber and the cylindrical mounting chamber;the receiving chamber of the control bar has a top provided with a protruding stop portion;the cylindrical mounting chamber of the control bar has a periphery provided with an annular receiving groove and an annular limit flange located under the annular receiving groove;the control bar has an upper end provided with a transverse through hole connected to the receiving chamber;the control bar has two opposite sides each provided with a fixing bore extending through the annular limit flange and aligning with the screw bore of the mounting post;each of the two screw members is extended through the respective fixing bore of the control bar and is screwed into the respective screw bore of the mounting post to lock the control bar onto the mounting post;the adjusting member is mounted in the receiving chamber of the control bar;the adjusting member has an interior provided with a non-circular control hole aligning with the transverse through hole of the control bar;the adjusting member has a first side provided with a locating lug and a second side provided with a braking lug;the adjusting member has a periphery provided with a release groove located between the locating lug and the braking lug and the locating groove is located between the locating lug and the release groove;the connecting unit is mounted in the control bar and includes: a connecting bolt having a lower end provided with a threaded rod screwed into the threaded hole of the mandrel;a fixing block having a bottom connected with a non-circular enlarged upper end of the connecting bolt and a top provided with a slot; anda driven member mounted in the slot of the fixing block and pressed by the adjusting member; andthe driven member of the connecting unit partially protrudes outward from the top of the fixing block. 2. The castor of claim 1, wherein the locating disk is movable to engage the elastic locating plate;the braking disk is movable to abut the roller;the elastic locating plate has a side provided with a locking protrusion;the locating disk has a periphery provided with a locking opening detachably locked onto the locking protrusion of the elastic locating plate;the braking disk is located under the locating disk and has a bottom face provided with a plurality of braking bosses engaging the roller;the stop shoulder of the mandrel is located between the upper end of the mandrel and the non-circular mounting section of the mandrel;the elastic member has a lower end abutting the mounting tube;the mounting tube is located above the stop shoulder of the mandrel;the annular limit flange of the control bar is received in the annular limit groove of the mounting post;the non-circular enlarged upper end of the connecting bolt abuts an upper end of the elastic member, wherein the elastic member is biased between the non-circular enlarged upper end of the connecting bolt and the mounting tube. 3. The castor of claim 1, further comprising two opposite covers mounted on the wheel frame to cover the roller. 4. The castor of claim 1, wherein the non-circular mounting section of the mandrel has a distal portion provided with an outer thread onto which a locking nut is screwed;the locking nut abuts the braking disk, wherein the locating disk and the braking disk are fixed on the non-circular mounting section of the mandrel and are limited between the stop shoulder of the mandrel and the locking nut. 5. The castor of claim 1, further comprising a spacer mounted on the non-circular mounting section of the mandrel and located between the locating disk and the braking disk to space the locating disk from the braking disk.
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