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    • 2. 发明专利
    • Bearing with rotary sensor
    • 带旋转传感器的轴承
    • JP2003302254A
    • 2003-10-24
    • JP2002107733
    • 2002-04-10
    • Ntn CorpNtn株式会社
    • FUJIKAWA YOSHIOKOIKE TAKASHITAKAHASHI TORUIWAMOTO KENICHI
    • G01P3/487F16C41/00G01D5/245G01P13/04
    • PROBLEM TO BE SOLVED: To provide a bearing with a rotary sensor capable of increasing a resolution while securing a magnetic flux density detected by a magnetic sensor.
      SOLUTION: In this bearing with the rotary sensor, a detected part 7 and a magnetic detection part 8 are installed on a rolling bearing 1 having a rotating side race 2 and a fixed side race 3. The detected part 7 is a ring-shaped member having a plurality of N and S magnetic poles alternately and equally-spaced in the circumferential direction, and installed on the rotating side race 2. The magnetic detection part 8 contains the magnetic sensor 13, and installed on the fixed side race 3. The magnetic detection part 8 contains two yokes 14 and 15 forming magnetic circuits between the plurality of magnetic poles with one polarity of the plurality of magnetic poles fitted to the detected part 7 and the magnetic sensor 13 and between the magnetic sensor 13 and the plurality of magnets with the other polarity. These yokes 14 and 15 are formed in multi- teeth yokes having a plurality of detecting projected parts 14a and 15a opposed to the magnetic poles of the detected part 7.
      COPYRIGHT: (C)2004,JPO
    • 要解决的问题:提供一种具有能够在确保由磁性传感器检测到的磁通密度的同时提高分辨率的旋转传感器的轴承。 解决方案:在带旋转传感器的轴承中,检测部件7和磁检测部件8安装在具有旋转侧座圈2和固定侧座圈3的滚动轴承1上。检测部件7是环 形状的构件,其具有在圆周方向上交替且等间隔的多个N和S磁极,并且安装在旋转的侧座圈2上。磁性检测部分8包含磁传感器13,并安装在固定侧座圈3上 磁检测部分8包含两个磁轭14和15,它们在多个磁极之间形成磁路,磁极具有与检测部分7和磁传感器13以及磁传感器13和多个磁体之间的多个磁极的一个极性 的磁极与另一极性。 这些磁轭14和15形成在具有多个与被检测部分7的磁极相对的检测突出部分14a和15a的多齿磁轭中。(C)2004,JPO
    • 3. 发明专利
    • Attachment main shaft device
    • 附件主轴装置
    • JP2003011036A
    • 2003-01-15
    • JP2001198220
    • 2001-06-29
    • Ntn Corpエヌティエヌ株式会社
    • FUJIKAWA YOSHIOOZAKI TAKAMI
    • B23Q11/12B23Q1/26B23Q1/38B23Q1/70B23Q3/12B23Q5/04
    • PROBLEM TO BE SOLVED: To provide an attachment main shaft device fitted to a machine tool, having high rotational accuracy of a tool and holding rigidity, and capable of improving machining accuracy and attaining high speed rotation especially in high speed cutting with a small-diameter tool.
      SOLUTION: A main shaft 1 is supported in a housing 3 by bearings 7, 9, and a driving source 5 is contained in the housing 3. A support part of the main shaft 1 by the bearings 7, 9 and a chuck means 8 are formed by an integrated member. The chuck means 8 is formed by providing the tip of the main shaft 1 with a tool fitting hole 2 in which a shank part of a tool 4 is interference-fitted. The chuck means 8 enlarges the minimum inside diameter of the tool fitting hole 2 by thermal expansion to attach and detach the tool 4. The chuck means 8 may elastically deform the tool fitting hole 2 with external force to attach and detach the tool 4. The bearings 7, 9 are respectively hydrostatic gas bearings. In the hydrostatic gas thrust bearing 9, the rear end face 1a of the main shaft 1 is a baring surface.
      COPYRIGHT: (C)2003,JPO
    • 要解决的问题:提供一种装配到机床上的安装主轴装置,具有高的刀具转动精度和保持刚性,并且能够提高加工精度并获得高速旋转,特别是在具有小直径的高速切削 工具。 解决方案:主轴1通过轴承7,9支撑在壳体3中,驱动源5容纳在壳体3中。主轴1的轴承7,9的支撑部分和卡盘装置8是 由综合成员组成。 卡盘装置8通过为主轴1的尖端设置有工具装配孔2而形成,工具4的柄部被干涉配合。 卡盘装置8通过热膨胀扩大工具装配孔2的最小内径,以附接和拆卸工具4.卡盘装置8可以用外力使工具装配孔2弹性变形以附接和拆卸工具4。 轴承7,9分别为静液压轴承。 在静水压推力轴承9中,主轴1的后端面1a为弯曲面。
    • 5. 发明专利
    • STATIC PRESSURE BEARING DEVICE
    • JP2000110836A
    • 2000-04-18
    • JP28457898
    • 1998-10-06
    • NTN TOYO BEARING CO LTD
    • OZAKI TAKAMIFUJIKAWA YOSHIO
    • B23B19/02F16C32/06
    • PROBLEM TO BE SOLVED: To prevent overload by providing a measuring means for a static pressure bearing clearance in the static bearing device supporting a movable body to a fixed body by a static pressure of fluid in the static pressure bearing clearance. SOLUTION: The pressure P1, P2 of static pressure bearing clearances d1, d2 is measured so that load of each static pressure bearing part, namely, the load of clearances d1, d2 between the fixed body 1 and a rotor, or of each static pressure bearing part changes in the clearances d1, d2 can be found (found by multiplication of bearing rigidity by bearing clearance) and the displacement of the rotor can be found by conversion. The measured value or the converted value are transmitted to the outside. When the converted value is transmitted to the outside, a pressure sensor 6 itself or a signal transmission means 7 has a function of converting. The signal transmitted to the outside is thus monitored so that the overload of the static pressure bearing device 10 can be prevented.
    • 9. 发明专利
    • CONTROLLING METHOD FOR SPINDLE USING STATIC PRESSURE GAS BEARING
    • JPH02217617A
    • 1990-08-30
    • JP3996889
    • 1989-02-20
    • NTN TOYO BEARING CO LTD
    • YAMAZAKI SHIZUKAFUJIKAWA YOSHIONIKI MOTOHARU
    • F16C32/06
    • PURPOSE:To restrain the increase of vibration of a spindle when it passes at critical speed so as to make balancing work unnecessary by supplying air to a bearing at less than predetermined pressure before the rotating speed of the spindle exceeds the resonant point, and reducing the air supply pressure to below predetermined pressure after the speed exceeds the resonant point. CONSTITUTION:When a spindle 2 is rotated, a rotating speed detector 4 measures the rotating speed and outputs it to a pressure control valve controller 7. The controller 7 receives the output signal and next actuates a pressure control valve 6 so as to vary air supply pressure to a bearing 3, 3: i.e. when the rotating speed of the spindle is in the range of 0 to (b) point, a great amplitude is shown by the resonant point if the air supply pressure is P2, while if the air supply pressure is P1 a stable, low amplitude is shown. When the rotating speed is (b) to (a) point, a great amplitude is shown by the resonant point if the air supply pressure is P1, while if the air supply pressure is P2 a low, stable amplitude is shown. Thus, when the rotating speed is 0 to (b), the pressure is P1, while when the speed is more than (a) point the pressure is changed to P2 again, whereby it is made possible to rotate the spindle off each resonant point.