CN201726112U

CN201726112U - Motor protector

Info

Publication number: CN201726112U
Application number: CN2009202710531U
Authority: CN
Inventors: 王华楼
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-26
Filing date: 2009-11-26
Publication date: 2011-01-26
Anticipated expiration: 2019-11-26

Abstract

The utility model relates to a motor protector device used on various mechanical drive motors and formed by the connection of a steel ball moving in a tray and a sliding disc in a motor main body protector chamber with a return spring, a push rod, a copper disc and contact points. As for the motor protector, when the motor is disconnected or burned off suddenly or is abnormal in starting, the motor can stop running and cut off electricity in time, thus realizing the using effect of safe motor starting. The motor protector is convenient and reliable in use and applicable to motors of all the models.

Description

Motor protecter

[technical field]

The utility model relates to the design of the protector of a kind of use on the mechanical rotation motor.

[background technology]

At present, the rotary machine motor uses, the main cause that causes motor to damage: 1, power supply phase shortage, and 2, motor spare damages, 3, the parts damage of bearings of motor own, heavy wear etc., these reasons all can cause the damage of motor, cause unsafe factor.And the startup protective device of all kinds of motors is the cut-out and the closure of A.C. contactor, starting compensator and star triangle start Control current circuit; if any one opens circuit mutually in the triple line, these several protective devices still do not have desirable cutting off the electricity supply (being automatic trip).The utility model is exactly the design that will solve this automatic control equipment on this kind motor protecter.

[summary of the invention]

The purpose of this utility model provides a kind of electric motor protecting apparatus easy to use, utilizes motor that power supply is played in device generation shake-up in the motor main body protector and closes down automatically.

In order to realize above-mentioned purpose; the protective device of motor protecter of the present utility model; it is the centrifugal action that utilizes motor to rotate; be fixed in three grooves of pallet of motor tail end; the steel ball of 3 diameter 18mm has been housed respectively; motor is as long as rotate; three steel balls utilize centrifugal action to promote push rod pull switch on the sliding plate; cause pull in winding (magnetic coil) energising of contact point; produce magnetic force; the motor three-phase current is connected; any phase line no matter; produce short circuit in any position and open circuit; cause motor not change; the steel ball self-return of motor protecter; push rod is also return thereupon; the mains switch of push rod upper end utilizes the strength of return spring also to cut off electric current on the A.C. contactor magnetic coil immediately; force A.C. contactor to trip immediately; cut off the three phase mains that leads to motor; protection motor whatsoever reason can not burn; in addition; if motor power is all out of question; but appearring in the various working machines that motor drove, damage parts; stuck; motor rotation is motionless, and this moment, the steel ball of motor protecter also can lose centrifugal force, will cut off contactor at once and (comprise starting compensator; star triangle starting cabinet) power supply on the magnetic coil on forces three phase mains to disconnect immediately, plays the effect of protection motor.In a word, motor is any reason no matter, and the motor protecter centrifugal force that shuts down disappears, and three phase mains will be cut off immediately, and the protection motor can not burnt.

[description of drawings]

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is the cutaway view of the utility model specific embodiment.

Illustrate 1 motor protecter: 1, motor main body protector, 2, pallet, 3, steel ball, 4, sliding plate, 5, return spring, 6, push rod, 7, the copper dish, 8, contact point, 9, binding post, 10, locking nut

[embodiment]

The apparatus structure of the motor protecter shown in Fig. 1, motor main body protector 1 indoor are provided with and on return spring 5 that pallet 2, movable steel ball 3, sliding plate 4 connect, the push rod 6 contact copper dish 7 are housed and contact point 8 is formed.

In the indoor pallet 2 of the motor main body protector 1 of the motor protecter shown in Fig. 1 steel ball 3 is arranged, steel ball 3 is the wear-resisting ball of steel of rotatable slip, steel ball, 3 sliding plates 4 main body motor protecter 1 is indoor can be freely up and down; Main body motor protecter 1 indoor pallet 2 has three ball grooves of gradient shape, and movable steel ball 3 rotatable rollings are convenient to steel ball 3 movable sliding plate 4 extruding return springs 5 and are as the criterion; Copper dish 7 is a round diameter, should be wider than the face of two diameter contact points 8.Its motor main body protector 1 is fixing respectively with locking nut 10 in two sub-sections, and pallet 2, steel ball 3 and sliding plate 4 partial fixings are on shaft tail end behind the motor, and the partial fixing of copper dish 7 and contact point 8 is on the guard shield of fan drum; Its steel ball 3 sliding plates 4 and return spring 5, push rod 6 be activity push-and-pull copper dish 7 flexibly, is convenient to and the contacting of two contact points 8, and binding post 9 is direction outwardly.

During electric motor starting, motor protecter is connected on start switch in the ac contactor coil, treat that motor rotation is normal after, starting switch cut off getting final product.

The effect of this utility model motor protecter has and can in time shut down, cut off the power supply, and plays the result of use of electric motor starting security insurance, and convenient the installation on all size motor of utilization used, and be convenient and reliable.

Claims

1. motor protecter; it is characterized in that: indoor return spring (5), the push rod (6) that is provided with pallet (2), movable steel ball (3), sliding plate (4) connection of motor main body protector (1) is equipped with copper dish (7), contact point (8) is formed, and motor main body protector (1) rotates by motor movable steel ball (3) is connected and separates with contact point (8) to the stressed support sliding plate of inner rotary (4) promotion return spring (5), copper dish (7).

2. motor protecter according to claim 1 is characterized in that: the rotatable slip of steel ball (3) in the indoor pallet of motor main body protector (1) (2) ball groove is flexible, and steel ball (3) is the wear-resisting ball of steel; In pallet (2) the ball groove steel ball (3) and sliding plate (4) motor main body protector (1) is indoor can be freely up and down; Three ball grooves of gradient shape that rotatable rolling steel balls (3) is arranged on the pallet (2) are convenient to the movable sliding plate of steel ball (3) (4) extruding return spring (5) and are as the criterion; Copper dish (7) is circular, and diameter should be wider than the face of two contact points (8).

3. motor protecter according to claim 1, it is characterized in that: its motor main body protector (1) uses locking nut (10) fixing respectively in two sub-sections, and pallet (2), steel ball (3) and sliding plate (4) partly are fixed on behind the motor on the shaft tail end with locking nut (10); The partial fixing of copper dish (7), contact point (8) is on the guard shield of fan; Its steel ball (3), sliding plate (4) and return spring (5), push rod (6) be activity push-and-pull copper dish (7) flexibly, is convenient to and the contacting of two contact points (8), and binding post (9) is direction outwardly.