CN2683885Y - Decelerating starting motor with long useful life - Google Patents

Abstract

Disclosed is a decelerating starting motor with long useful life, comprising a bracket, a stator, a rotor, an electric brush, a drive gear, a clutch and a power output gear. The utility model is characterized in that an electromagnetic switch is installed on the middle bracket, a wire wheel carrier is installed on an iron core, a coil, a fixed plate, an insulating strip and an electrical contact are installed on the wire wheel carrier, an iron plunger is installed in the wire wheel carrier, and a crown bar is arranged on one end of the plunger through a spring; the crown bar is connected with the clutch through a spring and steel balls, a conducting copper ring is installed on the outer wall face of the plunger through the insulating strip; a pressure spring is arranged between a conducting copper plate and the second end of the plunger through an insulator to make the contact of the conducting copper ring and the electrical contact good, which avoids the electric corrosion of the contact by electric spark and improves starting life time.

Description

The retard start motor of starting long service life

(1) technical field: the utility model relates to the retard start motor, is specifically related to a kind of retard start motor with starting long service life.

(2) background technique: the copper contact bad connection of existing commercially available its magnetic switch of actuating motor ubiquity, in the switching process of electric motor starting, the conducting copper coin contacts closely not inhomogeneous arcing and galvanic corrosion phenomenon when causing big current lead-through with each copper contact, copper contact is damaged, have a strong impact on the starting working life of actuating motor, statistics shows that the starting of existing actuating motor only reaches 2000 working life---30000 times.

(3) summary of the invention: the purpose of this utility model is to improve the structural disadvantages of above-mentioned magnetic switch, designs a kind of retard start motor that starts long service life.

The technical solution of the utility model is as follows: it comprises front rack, middle carriage and tail-bracket, middle carriage is connected with front rack, fixedly mount stator between front rack and the tail-bracket, in stator, install rotor, device brush spring and brush in tail-bracket, brush contacts with the commutator of rotor, in the rotating shaft of rotor gear is set, said gear and under drive gear engagement, the power input gear engagement of under drive gear and overrunning cluth; Institute's carriage that is right connects rear end cover, device switch iron core on the middle carriage, device line wheel carrier on the switch iron core, sequence unit double-layer coil on the line wheel carrier, fixed plate, insulating trip, be close to insulating trip current of electric conducting contact is installed on middle carriage, online center fixture irony plunger body of taking turns support body, plunger one end is by the spring assembly push rod in the plunger, push rod joins by the clutch shaft of outer casing spring and steel ball and overrunning cluth, the plunger outer wall is by insulating trip device conducting copper coin, it is characterized in that said conducting copper coin is an annular plate, between conducting copper coin and the plunger second end termination, holddown spring is installed by insulator.It is further characterized in that between conducting copper coin and plunger outer wall installs stretched spring by insulator.

The utility model is owing to be designed to an annular slab with the conducting copper coin, to the contact wide coverage of electrical contact, between the termination of conductive copper and plunger or wall, install holddown spring or stretched spring additional, when big current lead-through takes place and contacts in conducting copper ring and the right and left conducting copper contact, the tight power of pressure (drawing) and the elasticity that are added with spring are adjusted power, make that copper ring contacts with contact closely, surface of contact is even, alleviate arcing or galvanic corrosion damage greatly to copper contact, make starting big leap ahead in working life of the present utility model, number of starts can reach more than 50000 times.

(4) description of drawings:

Fig. 1 is a structural drawing of the present utility model;

Fig. 2 is the shutoff configuration state figure of magnetic switch of the present utility model;

Fig. 3 is the engaging structure phase diagram of magnetic switch of the present utility model;

Fig. 4 is an electromagnetic switch circuit schematic diagram of the present utility model.

(5) embodiment:

See Fig. 1, the utility model comprises front rack 1, middle carriage 19 and tail-bracket 8, and middle carriage 19 is connected with front rack 1, fixed installation stator 5 between front rack 1 and the tail-bracket 8, and device has field coil in the stator 5, device rotor 6 in stator 5.Device brush spring and brush spring assembly 7 in tail-bracket 8, brush contacts with the commutator of rotor 6.The rotating shaft of rotor 6 is provided with gear, this gear and under drive gear 4 engagements, under drive gear 4 is installed on the roller bearing that is made of roller 2, rotor seat 3, and rotor seat 3 is fixed in carriage 1 by bearing pin, and under drive gear 4 meshes with the power input gear of overrunning cluth 22.Middle carriage 19 connects rear end covers 9, the electromagnetism switch starter of device reducing motor in rear end cover 9, it is constructed as follows: device switch iron core 18 on the middle carriage 19, device line wheel carrier 15 on the iron core 18, be wound with internal layer electromagnetic coil 17 and outer layer line electromagnetic coil 16 on the line wheel carrier 15, fixed plate 14 on the end face of line wheel carrier 15 between sequence unit line wheel carrier and iron core, insulating trip 13, being close to insulating trip 13 is installed in current of electric conducting contact 10 and 12 on the middle carriage 19, the center fixture irony plunger body 11 of online wheel carrier 15, see Fig. 1 and Fig. 2, plunger 11 passes the perforate of fixed plate 14 and insulating trip 13 central authorities.See Fig. 1 and Fig. 2, first end of plunger 11 is by plunger inner spring 27 device push rods 26, push rod 26 outer casing springs 20, push rod 26 and spring 20 tops connect by the clutch shaft of steel ball 21 with overrunning cluth 22, and the outer wall of plunger 11 is by insulating trip 28 device conducting copper rings 25.Be close to conducting copper ring 25 insulation lid 24 is installed, holddown spring 23 is installed between insulation lid 24 and plunger 11 second end terminations.Configuration state figure when Fig. 2 turn-offs for above-mentioned magnetic switch is in, conducting this moment copper ring 25 is in disengaged condition with conducting B contact 10 and M contact 12, its circuit theory as shown in Figure 4, M among Fig. 4 is a motor, the switch starter 29 of control circuit is in off state, 30 is DC electrical source, and other labels as hereinbefore.After switch among Fig. 4 29 closes, the electric current that flows into electromagnetic coil 17 and 16 in the same way, the electromagnetic field stack produces powerful transient magnetic field gravitational attraction plunger 11, conducting copper ring 25 and copper contact 10 and 12 short circuit closures, electric current directly flows into motor M by contact 10 and 12 by power supply 30, make the motor rotation, this moment, coil 17 no currents passed through, and only depended on the electric current in the coil 16 to keep the closure of copper ring 25 and contact 10 and 12, magnetic switch is on state, and its configuration state figure as shown in Figure 3.Plunger 11 sucks in the coil as can be seen from Fig. 3, and copper ring 25 is connected with contact 10 and 12.See Fig. 1, Fig. 2, Fig. 3, at this moment, push rod 26 and pressure spring 20 push away forward by the clutch shaft of steel ball 21 with overrunning cluth 22, make the power output wheel and the engine engagement of overrunning cluth 22, thereby start the engine.What switch 29 disconnected in Fig. 4 is instantaneous, the electric current of power supply 30 is by contact 10, copper ring 25 and contact 12, flow path coil 17 and 16, current direction is constant in the coil 16 at this moment, and the current opposite in direction in the coil 17, produce and offset magnetic force, plunger 11 among Fig. 3 is released from electromagnetic coil by the rebounding force of spring 20, copper ring 25 leaves contact 10 and 12, magnetic switch is got back to off state as shown in Figure 2 again, the steel ball 21 of the push rod termination of the clutch shaft of overrunning cluth 22 and magnetic switch breaks away from, and its power output wheel and engine break away from.

Spring 23 among Fig. 2 also can be installed on the another side of conducting copper ring 25, for example be installed between the outer wall of conducting copper ring 25 and plunger 11 by insulator, the outer wall that this moment, spring 23 hooked conducting copper coin and plunger 11, become draught spring, make conducting copper ring 25 closely contact and play corrective action equally with contact 10 and 12.

Claims (2)

1, the retard start motor of starting long service life, it comprises front rack, middle carriage and tail-bracket, middle carriage is connected with front rack, fixedly mount stator between front rack and the tail-bracket, in stator, install rotor, device brush spring and brush in tail-bracket, brush contacts with the commutator of rotor, in the rotating shaft of rotor, gear is set, said gear and under drive gear engagement, the power input gear engagement of under drive gear and overrunning cluth; Institute's carriage that is right connects rear end cover, device switch iron core on the middle carriage, device line wheel carrier on the switch iron core, sequence unit double-layer coil on the line wheel carrier, fixed plate, insulating trip, be close to insulating trip current of electric conducting contact is installed on middle carriage, online center fixture irony plunger body of taking turns support body, plunger one end is by the spring assembly push rod in the plunger, push rod joins by the clutch shaft of outer casing spring and steel ball and overrunning cluth, the plunger outer wall is by insulating trip device conducting copper coin, it is characterized in that said conducting copper coin is an annular plate, between conducting copper coin and the plunger second end termination, holddown spring is installed by insulator.

2,, it is characterized in that between conducting copper coin and plunger outer wall, stretched spring being installed by insulator by the retard start motor of the said starting long service life of claim 1.

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