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    Helical broach and internal gear machining method using the same
    4.
    发明授权
    Helical broach and internal gear machining method using the same 有权

    公开(公告)号：US10543541B2

    公开(公告)日：2020-01-28

    申请号：US15904507

    申请日：2018-02-26

    申请人： NACHI-FUJIKOSHI CORP.

    发明人： Hideki Sato ,  Shota Miura ,  Kazuyuki Nakamura ,  Masayuki Tsuno

    IPC分类号： B23F21/26 ,  B23D43/00 ,  B23D43/06 ,  B23D37/16 ,  B23D43/04

    摘要： A helical broach which eliminates the need for a fixing means for fixing a workpiece during gear machining is provided. The helical broach includes: a plurality of cutting edges; a spiral flute formed between adjacent cutting edges to extend in a spiral manner with a predetermined helix angle with respect to an axial direction of the helical broach; and a gullet formed between adjacent cutting edges to extend with a predetermined helix angle with respect to a circumferential direction of the helical broach. In the helical broach, the expression: 0.5≤tan β/tan(α+β)≤0.7 is satisfied, wherein β is the helix angle of the spiral flute, and (90°−α) is the helix angle of the gullet with reference to a central axis of the helical broach. An internal gear machining method using the helical broach is also provided.

    Apparatus for producing grooves by means of broaching tools
    6.
    发明授权
    Apparatus for producing grooves by means of broaching tools 失效
    用于生产手工工具的装置

    公开(公告)号：US3799030A

    公开(公告)日：1974-03-26

    申请号：US22487072

    申请日：1972-02-09

    申请人： FORST O GMBH

    发明人： SCHUBERT L

    IPC分类号： B23D37/10 ,  B23D37/16 ,  B23D41/06

    CPC分类号： B23D41/06 ,  B23D37/10 ,  B23D37/16 ,  Y10T409/4014 ,  Y10T409/401575 ,  Y10T409/4028 ,  Y10T409/404375 ,  Y10T409/40455 ,  Y10T409/405775

    摘要： The invention concerns a vertical broaching machine in which several work blanks, such as rings, can be simultaneously provided with grooves at one or more broaching positions to which the work blanks, for example rings, are fed into the machine on a feeding device such as a slide onto a transporting device which moves the work blank or blanks to a broaching position where the grooves are formed by means of tools that move downwardly from the top, and after forming of the grooves the blanks are turned by an angle of 120* and are transported either to another broaching position for forming additional grooves or to a discharge device for completely broached blanks.

    摘要翻译： 本发明涉及一种垂直拉床，其中几个工件坯料，例如环，可以在一个或多个拉削位置处同时设置有凹槽，工件坯料，例如环，在进给装置上进给到机器，例如 将工件坯件或坯料移动到通过从顶部向下移动的工具形成槽的拉削位置的运输装置上滑动，并且在形成槽之后坯料以120°的角度转动，并且 被运送到用于形成附加凹槽的另一个拉削位置或用于完全拉伸的坯料的排出装置。

    Apparatus for assembling bearing and stationary drum
    9.
    发明授权
    Apparatus for assembling bearing and stationary drum 失效
    装配轴承和固定鼓的装置

    公开(公告)号：US5924182A

    公开(公告)日：1999-07-20

    申请号：US976569

    申请日：1997-11-24

    申请人： Dae-Sun Yoo

    发明人： Dae-Sun Yoo

    IPC分类号： G11B5/52 ,  B23D5/02 ,  G11B5/53 ,  B23P19/02 ,  B23D37/16

    CPC分类号： G11B5/53 ,  B23D5/02 ,  Y10T29/5191 ,  Y10T29/53826 ,  Y10T409/402975 ,  Y10T409/503116

    摘要： A head drum assembly for use in a video cassette recorder includes a stationary drum, a rotary shaft rotatably fitted into the stationary drum, a rotary drum closely fitted onto the rotary shaft, a lower bearing fitted into a lower portion of the stationary drum and an upper bearing fitted into an upper portion of the stationary drum. Herein, the upper bearing includes a top surface facing the rotary drum and an inner peripheral surface, facing the rotary shaft. The top surface is provided with a plurality of building-up grooves for retaining an oil for lubricating the upper bearing and the inner peripheral surface is provided with an oil guiding groove for guiding the oil retained on the inner peripheral surface onto the building-up groove of the top surface during rotation of the rotary shaft.

    摘要翻译： 用于盒式录像机的磁头鼓组件包括固定磁鼓，可旋转地装配到固定磁鼓中的旋转轴，紧密地装配在旋转轴上的旋转磁鼓，装配到固定磁鼓的下部的下轴承和 上轴承装配到固定滚筒的上部。 这里，上轴承包括面向旋转鼓的顶表面和面向旋转轴的内周表面。 顶表面设有多个用于保持用于润滑上轴承的油的建立凹槽，并且内周表面设置有导油槽，用于将保持在内周面上的油引导到积层槽 在旋转轴的旋转期间的顶表面。