The invention provides a brake device, a lever block and a ratchet mechanism which can prevent a ratchet from reversing even if a switching knob is mistakenly operated towards a rewinding direction side during winding. A brake device (70) is provided with: a brake bracket (71) which is supported so as not to rotate by a drive shaft (25) and which has a flange section (71a) and a boss section (71b); a female screw member (35) that is axially supported by the boss section (71b) and that is screwed to a male screw section (26) on the outer periphery of the drive shaft (25); a ratchet wheel (80) which is sandwiched between the flange part (71a) and the female screw member (35) that face each other, and which has ratchet teeth (83) that restrict the rotation direction in one direction on the outer peripheral side; brake plates (71a, 72b) disposed between the ratchet wheel (80) and at least one of the flange portion (71a) and the female screw member (35); and a pair of pawl members (90) that mesh with the ratchets (83) and are disposed at symmetrical positions centered on the drive shaft (25). The ratchet wheel (80) is provided with high teeth (831) and low teeth (832), wherein the protruding height of the low teeth (832) from the center is lower than that of the high teeth (831).

    本发明提供一种即使在卷起时误将切换旋钮向回绕方向侧操作了的情况下,也能够阻止棘轮反转的制动装置、手扳葫芦及棘轮机构;制动装置(70)具备:制动器托架(71),其以不能旋转的方式支承于驱动轴(25),并具有凸缘部(71a)和轴套部(71b);阴螺纹部件(35),其轴支承于轴套部(71b),并与驱动轴(25)外周的阳螺纹部(26)螺合;棘轮(80),其被相对置的凸缘部(71a)和阴螺纹部件(35)所夹持,并且在外周侧具有将旋转方向限制于一个方向的棘齿(83);制动板(71a、72b),其配置于凸缘部(71a)和阴螺纹部件(35)中的至少一者与棘轮(80)之间;以及一对棘爪部件(90),其与棘齿(83)啮合,并且配置于以驱动轴(25)为中心的对称位置;棘轮(80)上设有高齿(831)和自中心的突出高度比高齿(831)低的低齿(832)。


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    Title :

    Brake device, lever block and ratchet mechanism


    Additional title:

    制动装置、手扳葫芦以及棘轮机构


    Contributors:

    Publication date :

    2022-11-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66D Haspeln , CAPSTANS



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