具有感測預壓力功能的雙螺帽滾珠螺桿DOUBLE NUT BALL SCREW CAPABLE OF SENSING PRELOAD

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

14/956,935

專利證號

US 9,920,822 B2

專利獲證名稱

具有感測預壓力功能的雙螺帽滾珠螺桿DOUBLE NUT BALL SCREW CAPABLE OF SENSING PRELOAD

專利所屬機關 (申請機關)

國立中正大學

獲證日期

2018/03/20

技術說明

一種具有預壓力感測功能之滾珠螺桿裝置，包含有一螺帽、一螺桿及複數滾珠，該螺帽具有一繞著一中心軸線之內螺紋，該螺桿係穿設於該螺帽並具有一繞著該中心軸線之外螺紋，該等滾珠係能滾動地設置於該螺帽之內螺紋及該螺桿之外螺紋之間；該滾珠螺桿裝置之特徵在於：該螺帽設有一安裝孔，該安裝孔內具有一安裝面，該安裝面係實質上以垂直於該中心軸線之方向而對應於該內螺紋，且該安裝面設置一力量感測器；藉此，該滾珠螺桿裝置可供即時監控其預壓力，且係採用直接感測之方式，因而較不易受環境因素影響，因此其感測結果較為準確。 The primary objective of the present invention is to provide a ball screw which is capable of sensing a preload for monitoring the preload in real time. The secondary objective of the present invention is to provide a ball screw which is not subject to any environmental factor, because it senses a preload directly, to have more accurate sensing result relatively. The foregoing objectives of the present invention are attained by the ball screw formed of a nut, a screw, and a plurality of balls. The nut includes an internal thread surrounding an imaginary central axis of the ball screw. The screw includes an external thread surrounding the imaginary central axis. The force sensor can directly sense a preload applied to the nut from the balls, so an output signal of the force sensor can enable a user to monitor the status that the preload of the ball screw is maintained to immediately know whether the preload is insufficient and to do proper adjustment if the preload is insufficient

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