CN202148858U

CN202148858U - Clamping-plate-type lead screw stopper

Info

Publication number: CN202148858U
Application number: CN201120221861U
Authority: CN
Inventors: 周长江; 陈永忠; 廖长青
Original assignee: YICHANG 480 ELECTROMECHANICAL CO Ltd
Current assignee: YICHANG 480 ELECTROMECHANICAL CO Ltd
Priority date: 2011-06-28
Filing date: 2011-06-28
Publication date: 2012-02-22
Anticipated expiration: 2021-06-28

Abstract

The utility model relates to a clamping-plate-type lead screw stopper; a lead screw is installed in a base; one extending end of the lead screw is connected with a driven gear; two grooved pulleys are connected with the lead screw through threads; a first torsion spring and a second torsion spring are fixedly arranged at two ends in the base respectively; a clamping plate connected with the first torsion spring and the second torsion spring is pressed in tooth grooves of the two grooved pulleys; and travel switches matched with the two grooved pulleys are arranged at two ends of the lead screw. The clamping-plate-type lead screw stopper provided by the utility model can be matched with all kinds of conventional open-close devices of rolling doors for use, and can realize the limiting function by the mode that the grooved pulleys move axially along the lead screw to trigger a microswitch. The two grooved pulleys can be adjusted to a required position conveniently only by pulling the adopted clamping plate out from the tooth grooves of the grooved pulleys by fingers, other auxiliary tools are not needed, and the adjustment is convenient and fast; as the clamping plate is clamped in the tooth grooves, the rigidity is greatly strengthened compared with a spring steel wire, therefore, the problem of plastic deformation of the spring steel wire is solved.

Description

Clamp plate type screw mandrel stop

Technical field

The utility model relates to a kind of stopping means, particularly a kind of stopping means that is applicable to the electric rolling door device that various conventional rolling door open and close.

Background technology

The stop of the rolling door headstock gear of producing both at home and abroad at present, is mainly cam-type stop and grooved pulley type screw mandrel stop.The cam-type stop causes in tightening the process of screw and originally swings with the cam of adjusting because two relative deep-slotted chip breakers that use two screws to pass on the cam are fixed on cam on the Positioning Gear, causes captured offset; And, because the characteristic of cam motion itself causes spacing stroke limiting.Volume is big so this kind stop has, and cost is high, and stroke is short, is difficult for debugging shortcomings such as accurate.And grooved pulley type screw mandrel stop since card entry slot wheel teeth groove be one section straight steel wire, when debugging, collude and draw the steel wire middle part to cause the steel wire plastic strain easily, cause spacing malfunctioning.

Summary of the invention

The utility model technical problem to be solved provides a kind of clamp plate type screw mandrel stop, can solve the problem of spring steel wire plastic strain.

For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of clamp plate type screw mandrel stop, and screw mandrel is installed in the base, and it stretches out an end and is connected with driven gear;

Two sheaves are connected with screw mandrel through screw thread, and first torsion spring and second torsion spring are fixedly mounted on two ends in the base respectively, are pressed in the teeth groove of two sheaves with the clamp that first torsion spring is connected with second torsion spring;

The travel switch that cooperates with two sheaves is positioned at the screw mandrel two ends.

Described travel switch is four.

A kind of supporting clamp plate type screw mandrel stop that is used in all kinds of conventional rolling door headstock gears that the utility model provides moves axially along screw mandrel through sheave, triggers microswitch, thereby realizes limit function.

Four travel switches that adopt; Be spacing protection switch wherein, when two travel switch switches of centre occur damaging or be malfunctioning, can guarantee to cut off motor power near two travel switches at base two ends; So that in time change travel switch, realize safeguard protection.

The clamp only with hand that adopts refers to from the sheave teeth groove, pull out can conveniently adjust two sheaves to desired location, need not other aids, easy to adjust quick, and saves the space.The utlity model has that volume is little, quality is little, spacing accurately and reliably, compact conformation and debug advantage easily, and safe and reliable.Owing to adopt clamp to snap in the teeth groove, compare its rigidity of spring steel wire and strengthen greatly, thereby solve the problem of spring steel wire plastic strain.

Description of drawings

Fig. 1 is the overall structure front view of the utility model.

Fig. 2 is the overall structure vertical view of the utility model.

The specific embodiment

In Fig. 1, Fig. 2, a kind of clamp plate type screw mandrel stop, screw mandrel 4 is installed in the base 2, and it stretches out an end and is connected with driven gear 1; Two sheaves 5 are connected with screw mandrel 4 through screw thread, and first torsion spring 6 and second torsion spring 8 are fixedly mounted on two ends in the base 2 respectively, and the clamp 3 that is connected with second torsion spring 8 with first torsion spring 6 is pressed in the teeth groove of two sheaves 5;

The travel switch 7 that cooperates with two sheaves 5 is positioned at screw mandrel 4 both sides.

Described driven gear 1, base 2 materials adopt the YL104 aluminium alloys.

Described sheave 5 adopts the powder metallurgy casting.

Described clamp 3 materials adopt the steel plate punch forming.

Described travel switch 7 is four.

The course of work of the utility model is: the power that is passed over by the rolling door headstock gear drives screw mandrel 4 rotations through driven gear 1; Screw mandrel 4 is given sheave 5 through screw thread pair with transmission of power, because first torsion spring 6, second torsion spring 8 that are fixed on the base 2 are pressed into clamp 3 in the teeth groove of sheave 5, have limited sheave 5 and has radially rotated; So sheave 5 can only move axially along screw mandrel 4; When moving to sheave 5 depression stroke switches 7 when needing the position, cut off the electricity supply, thereby realize limit function.When needs are adjusted spacing height, from sheave 5 teeth groove, pull out clamp 3 manual adjustments sheaves 5 to desired location with finger, thereby adjust spacing height.When travel switch 7 damages, need the protection of screw mandrel 4 opposite sides is changed to the damage position with travel switch, will protect then to renew, thereby guarantee reliable with travel switch.

Claims

1. clamp plate type screw mandrel stop, it is characterized in that: screw mandrel (4) is installed in the base (2), and it stretches out an end and is connected with driven gear (1);

Two sheaves (5) are connected with screw mandrel (4) through screw thread; First torsion spring (6) and second torsion spring (8) are fixedly mounted on the interior two ends of base (2) respectively, are pressed in the teeth groove of two sheaves (5) with the clamp (3) that first torsion spring (6) is connected with second torsion spring (8);

The travel switch (7) that cooperates with two sheaves (5) is positioned at screw mandrel (4) two ends.

2. a kind of clamp plate type screw mandrel stop according to claim 1, it is characterized in that: described travel switch (7) is four.