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    • 1. 发明授权
    • Apparatus for preventing circumferential overspeeding of a grinding wheel
    • 用于防止砂轮圆周超速的装置
    • US4090331A
    • 1978-05-23
    • US797616
    • 1977-05-17
    • Akiyoshi KobayashiYukihiro Nakayama
    • Akiyoshi KobayashiYukihiro Nakayama
    • B24B47/18
    • B24B47/18
    • An apparatus for preventing circumferential overspeeding of a grinding wheel is provided in which a first rejection pin, opposed to the circumferential surface of the grinding wheel, is linked with a second rejection pin through a link mechanism. A slide plate, guided by a cover device for covering a pulley belt connection portion, is engaged with the second rejection pin to be moved therewith radially of a first or second drive pulley being alternatively mounted on a drive motor. When the first rejection pin is manipulated from the forward end to the retraction end of a slot, prior to the mounting of a fresh grinding wheel, the slide plate moves a restraining pin provided thereon into a space to be occupied by the second drive pulley, larger than the first one, so that the fresh grinding wheel can be prevented from being driven by means of the second pulley.
    • 提供了一种用于防止砂轮周向超速的装置,其中与砂轮的圆周表面相对的第一排斥销通过连杆机构与第二排出销连接。 由用于覆盖皮带轮连接部分的盖装置引导的滑板与第二排斥销接合,以随着第一或第二驱动皮带轮径向地移动,交替地安装在驱动马达上。 当第一排出销从槽的前端到缩回端被操纵时,在安装新的砂轮之前,滑板将设置在其上的限制销移动到被第二驱动带轮占据的空间中, 大于第一滑轮,使得可以防止新鲜的砂轮通过第二滑轮驱动。
    • 3. 发明授权
    • Hydraulic dynamic bearing and spindle motor and rotary assembly provided
    • 提供液压动力轴承和主轴电机和旋转组件
    • US06371650B1
    • 2002-04-16
    • US09414244
    • 1999-10-07
    • Hiromitsu GotoIsamu TakeharaYukihiro NakayamaRyouji YoneyamaTakafumi SuzukiToshiharu KogureTadao IwakiNaoki KawawadaAtsushi OtaKoji Nitadori
    • Hiromitsu GotoIsamu TakeharaYukihiro NakayamaRyouji YoneyamaTakafumi SuzukiToshiharu KogureTadao IwakiNaoki KawawadaAtsushi OtaKoji Nitadori
    • F16C3206
    • F16C33/74F16C17/107F16C33/103F16C33/107F16C2370/12G11B19/2009
    • A double sleeve type dynamic bearing comprises a fixed shaft having at least one end fixedly mountable to an apparatus in which the bearing is utilized, a rotary sleeve arranged coaxially with the fixed shaft so that a first fine gap is formed therebetween, a fixed sleeve arranged coaxially with the rotary sleeve so that a second fine gap is formed therebetween, and a lubrication oil filled in the fine gaps. The first fine gap and the second fine gap each have an open end exposed to air outside the bearing and an opposite end that is not exposed to the air, the opposite ends being in communication with each other. A holding member holds the fixed shaft and the fixed sleeve and is disposed adjacent to a lower end surface of the rotary sleeve to form a third fine gap between the holding member and the lower end surface of the rotary sleeve. The third fine gap is formed with a thrust dynamic pressure producing groove, and opposite ends of the first and second fine gaps meet each other through the third fine gap. A peripheral surface of at least one of the fixed shaft, the rotary sleeve and the fixed sleeve forming at least one of the first and second fine gaps has a dynamic pressure producing groove formed therein.
    • 一种双套筒式动态轴承,包括固定轴,该固定轴具有固定地安装到使用轴承的装置的至少一个端部,与固定轴同轴设置的旋转套筒,使得在其间形成有第一细小间隙,固定套筒布置 与旋转套筒同轴,从而在它们之间形成第二细微间隙,并且填充有细小间隙的润滑油。 第一细间隙和第二细间隙各自具有暴露于轴承外部的空气的开口端和不暴露于空气的相对端,相对端彼此连通。 保持构件保持固定轴和固定套筒并且邻近旋转套筒的下端表面设置,以在保持构件和旋转套筒的下端表面之间形成第三细微间隙。 第三细间隙由推力动压产生槽形成,第一和第二细缝的相对端通过第三细间隙相互相交。 固定轴,旋转套筒和形成第一和第二细小间隙中的至少一个的固定套筒中的至少一个的周面具有形成在其中的动压产生槽。