CN2061556U

CN2061556U - Motor hoist with auto stop device

Info

Publication number: CN2061556U
Application number: CN 89220325
Authority: CN
Inventors: 曾瑞; 苏祖欣; 庄一蕾; 佟沐心
Original assignee: Individual
Current assignee: Zeng rui
Priority date: 1989-12-05
Filing date: 1989-12-05
Publication date: 1990-09-05

Abstract

The utility model discloses a motor hoist with an automatic stop device, which is provided with a coupling torque shaft coupling with double cones. The shaft coupling has small volume, compact structure, high safety, overload protection and automatic recovery capability. When the movement of the suspended arm of the stop device is blocked, the function can make the suspended arm automatically stopped. Thereby, the driving mechanism of the stop device can be protected, and a motor and a lifting object can not be accidentally damaged. So the motor can nearly realize no-load start, and the adopted power of the motor is matched with the load of the actual work. The whole transmission system is arranged in the inner part of a suspended beam, the strength beams such as the variable cross-section designed according to the moment diagram are practical and beautiful, and the processing property of the manufacture is good.

Description

Motor hoist with auto stop device

The utility model relates to a kind of coiled strip of handling horizontal positioned or special hanger--electronic coiled strip suspender of sleeve (general designation lifting thing) of being used for.

By the driven by motor mechanism for opening/closing, make left and right sides suspension hook do rightabout moving along the hanging beam length direction: during the suspension hook move toward one another of the left and right sides, the suspension hook closure was hooked the lifting thing when electronic coiled strip suspender was worked; During the opposing motion of left and right sides suspension hook, suspension hook is opened, and unclamps the lifting thing.But when the deficiency of this suspender is the approaching lifting of left and right sides suspension hook closure thing, be difficult to the control suspension hook and do not clash into the lifting thing, and this bump might makes the impaired or over current of motor scaling loss of suspender mechanism for opening/closing, more then is to damage to lift by crane the thing end.

In order to address this problem, the common practice is to utilize travel switch to control the suspension hook stroke.But when lifting thing length variations, just will adjust the travel switch position, this is for the use in practice not only extremely inconvenient, still is impossible when lifting thing length dimension changes greatly.This is that the variable range of travel switch is limited owing to structural limitations; When the center of suspension ring and lifting thing center-of-gravity position deviation are big when particularly lifting by crane; Or travel switch hinders when malfunctioning for some reason, and the accident of suspension hook bump lifting thing happens occasionally unavoidably.The hanging beam of existing suspender is a uniform beam on the other hand, has to a part of device and motor are placed the hanging beam outside not only unfavorable protection but also not attractive in appearance.

The purpose of this utility model is the electronic coiled strip suspender that the automatic stop motion mechnism of a kind of improved band will be provided; automatic stop when it can realize that suspension hook motion is obstructed; prevent that bump to lifting thing and suspender damaged when suspension hook was closed, realize overload protection, make the structure of suspender and moulding more reasonable simultaneously.

The purpose of this utility model is achieved in that makes beam with variable cross-section with the hanging beam of electronic coiled strip suspender, and motor and mechanism for opening/closing all place in the hanging beam, and a kind of moment coupler that limits the driving torque size is set between motor and the mechanism for opening/closing.Enough keep suspension hook proper motion state as long as the moment adjustment of this coupler is limited to; when moving, suspension hook is obstructed like this; moment increases when transfiniting; moment coupler operational failure; mechanism for opening/closing just quit work (at this moment motor can be still in running); thereby make the automatic stop of suspension hook, realize overload protection.

The utility model is designed to variable section (equal strength or approximate equal strength) beam with hanging beam by bending-moment diagram, has both made full use of the structure and the mechanics feature of hanging beam, economical with materials, and anufacturability is good; The available space that holds motor, moment coupler and mechanism for opening/closing is guaranteed, puts whole drivings device in hanging beam, practical safe, attractive in appearance; Simultaneously because the point of view does not lie in the stroke that limits suspension hook with travel switch; but realize overload protection by the automatic locking function of moment coupler; so it is to the fine adaptation of variation energy of lifting thing length, it is extremely convenient need not do any adjustment during practical application.This overload protection function can also improve the starting ability of motor, makes motor can be similar to starting under no load, and starting is level and smooth, can more rationally select motor for use by live load during design, avoids " low load with strong power " phenomenon.

The concrete structure of utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the front view (cut-away section) according to the electronic coiled strip suspender of the automatic stop motion mechnism of band that the utility model proposes.

Below in conjunction with Fig. 1, the details and the service condition of the concrete device that proposes according to utility model is described.

The utility model comprises: suspension ring (3), left and right sides suspension hook (6) is pressed whole drivings device--mechanism for opening/closing (1), moment coupler (2) and motor (4) in bending-moment diagram design-calculated variable section hanging beam (5) and the hanging beam (5).Long and two-short dash line represents that left and right sides suspension hook (6) drives and can open and close along hanging beam (5) length direction through mechanism for opening/closing (1) among the figure, and is in the situation of opening.

Moment coupler (2) places between mechanism for opening/closing (1) and the motor (4), and the moment coupler can be to adjust machinery or the fluid power moment coupler that limits driving torque, also can be a kind of bicone coupling moment coupler.A kind of moment coupler in back is simple and convenient, volume is little, reliable operation.

Fig. 2 is provided in a side of the section-drawing of the bicone coupling moment coupler between motor (4) and the mechanism for opening/closing (1).It comprises nut (8), packing ring (13), and spring (8) is also made Outer Taper (9) and (10) (power intake) cooperate with inner cone (11) (clutch end) to form frictional transmission by them and pays.The tight power of giving by adjustment spring (8) is may command driving torque size.Obviously, as long as being limited to, the driving torque that the adjustment spring pressure is paid frictional transmission enough keeps the suspension hook proper motion.When suspension hook is obstructed, just skid automatically between the fastness like this, make the automatic stop of suspension hook, realize overload protection; And the existence of spring makes it to have the runback transmission force property, and promptly resistance is eliminated, and recovers propagation function voluntarily.Inner cone (11) is clutch end (being miniature gears) and the directly engagement of big gear wheel (12) (it is the part of mechanism for opening/closing) of floating as can be seen from Figure 2.This compact design makes transmission arrangements simplify, and axial dimension shortens greatly, meets the beam with variable cross-section constructional feature again, little, the reliable operation of volume.

Claims

1, the electronic coiled strip suspender with automatic stop motion mechnism comprises: hanging beam (5), motor (4), mechanism for opening/closing (1) and the left and right sides suspension hook (6) that connects and can open and close along hanging beam (5) length direction through mechanism for opening/closing (1), and the hanging beam (5) that it is characterized in that electronic coiled strip suspender is a beam with variable cross-section; Motor (4) and mechanism for opening/closing (1) all place in the hanging beam; A kind of moment coupler (2) that limits the driving torque size is set between motor (4) and mechanism for opening/closing (1).

2, electronic coiled strip suspender according to claim 1 is characterized in that hanging beam (5) is by bending-moment diagram design-calculated beam with variable cross-section.

3,, it is characterized in that moment coupler (2) is to adjust machinery or the fluid power moment coupler that limits driving torque according to claim 1,2 described electronic coiled strip suspenders.

4, according to claim 1,2 described electronic coiled strip suspenders, it is characterized in that moment coupler (2) is a bicone coupling moment coupler, it is by nut (7), and packing ring (13), spring (8) make Outer Taper (9) and (10) form transmission with cone (11) and pay; The tight power of giving of spring (8) determines the driving torque size.

5,, it is characterized in that bicone coupling moment coupler inner cone (11) is the clutch end that floats according to claim 1,2,4 described electronic coiled strip suspenders.