Grooved wheel type screw rod limiter
A technology of limiter and sheave, which is applied in the direction of door/window protection device, window/door, building components, etc., can solve the problems of limited limit travel, difficult to debug accurately, limit offset and other problems, and achieve safety Protection, compact structure, accurate and reliable limit position
Inactive Publication Date: 2012-07-25
YICHANG NO 4820 FACTORY ZHONGCHE GRP
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Problems solved by technology
[0002] At present, the stoppers of rolling door hoists produced at home and abroad are cam-type stoppers. This kind of stopper uses two screws to pass through two opposite arc-shaped grooves on the cam to fix the cam on the positioning gear. , resulting in the swing of the adjusted cam in the process of tightening the screw, resulting in a limit offset; moreover, due to the characteristics of the motion of the cam itself, the limit travel is limited
Therefore, this kind of limiter has the disadvantages of large volume, high cost, short stroke, difficult to debug accurately, etc.
Method used
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[0015] Such as figure 1 and figure 2 As shown, a sheave-type screw limiter, the screw rod 5 is installed on the base 2, and one end of the screw rod 5 protrudes to connect with the driven gear 1; the sheave 3 and the screw rod 5 are thread pairs; torsion spring 6 is fixed on the inside of both ends of the base 2, and the buckle of the torsion spring 6 snaps into the tooth groove of the sheave 3;
[0016] The torsion spring 6 adopts parallel double torsion springs, and the buckle of the torsion spring 6 snaps into the tooth groove of the sheave 3 .
[0017] The number of the sheave 3 is two, and the number of travel switches 4 matched with the sheave 3 is four.
[0018] The base 2 is made of YL104 aluminum alloy.
[0019] The driven gear 1 and the sheave 3 are made by powder metallurgy.
[0020] The working process of the present invention is: the power transmitted by the rolling shutter door hoist drives the screw rod 5 to rotate through the driven gear 1, and the screw r...
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The invention relates to a grooved wheel type screw rod limiter. A screw rod is installed on a pedestal, and one end extending from the screw rod is connected with a driven gear; a grooved wheel and the screw rod are matched in a screw thread pair mode; a torsional spring is fixed on the inner sides of both ends of the pedestal, and a buckle of the torsinal spring is clamped in wheel teeth of thegrooved wheel; and travel switches matched with the grooved wheel are arranged on both sides of the screw rod. Because the axial movement of the grooved wheel along the screw rod triggers a microswitch, the grooved wheel type screw rod limiter realizes the function of limiting; the grooved wheel type screw rod limiter has the advantages of compact structure, small size, small quality, convenient debugging and accurate and reliable limiting.
Description
technical field [0001] The invention relates to a limiting device, in particular to a grooved wheel type screw limiter suitable for electric rolling door machines for opening and closing various conventional rolling doors. Background technique [0002] At present, the stoppers of rolling door hoists produced at home and abroad are cam-type stoppers. This kind of stopper uses two screws to pass through two opposite arc-shaped grooves on the cam to fix the cam on the positioning gear. , resulting in the swing of the adjusted cam in the process of tightening the screw, resulting in a limit offset; moreover, due to the characteristics of the motion of the cam itself, the limit stroke is limited. Therefore, this kind of limiter has the disadvantages of large volume, high cost, short stroke, difficult to debug accurately, and the like. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a sheave-type screw stopper, which ...
Claims
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IPC IPC(8): E06B9/80E06B9/90
Inventor 周长江廖长青陈永忠
Owner YICHANG NO 4820 FACTORY ZHONGCHE GRP