CN203423597U

CN203423597U - Rotor whose rotor shaft is insulated from iron core, and starter of related engine

Info

Publication number: CN203423597U
Application number: CN201320476084.7U
Authority: CN
Inventors: 白洪国
Original assignee: RUIAN HONGFA ELECTRICAL APPLIANCE Co Ltd
Current assignee: RUIAN HONGFA ELECTRICAL APPLIANCE Co Ltd
Priority date: 2013-08-05
Filing date: 2013-08-05
Publication date: 2014-02-05
Anticipated expiration: 2023-08-05

Abstract

The utility model discloses a rotor whose rotor shaft is insulated from the iron core, and a starter of a related engine. The rotor comprises a rotor shaft and an iron core. An insulating layer is arranged between the rotor shaft and the iron core. The insulating layer is composed of a plurality of arc sheets which are distributed uniformly. Each arc sheet is spiral. The rotation direction of the rotor can be used to satisfy the condition that air flow enter the spiral. When the air flow enter the spiral arc sheets, heat can be taken away, so the internal temperature of the rotor can be reduced, and specially the temperature of the arc sheets can be reduced, and the insulating performance of the insulating layer is further improved. The axial included angle between the spiral and a rotor shaft A is in the range from 15 DEG C to 30 DEG C. The insulating layer is made from epoxy glass fibers. The utility model further provides a starter of an engine. The starter comprises a starter housing in which the stator and an end cover are located and a carbon brush assembly. The starter further comprises the rotor. According to the utility model, advantages of simple structure, low cost, convenient machining, high temperature resistance and long service life can be realized.

Description

The starter of the rotor of armature spindle and core insulation and relevant engine

Technical field

The utility model relates to a kind of rotor, between the armature spindle of this rotor and iron core, insulating barrier is set, and also relates to the starter of the engine that uses this rotor, also relates to and has used the motor vehicle that the engine starter of insulating barrier is set between armature spindle, iron core.

Background technology

In prior art, the armature spindle of automotive engine starter rotor is to be directly connected with iron core, armature spindle, the shell of iron core and starter is electrically connected to automobile frame and as the negative pole of battery, automotive engine starter is when igniting, for various reasons as winter temperature low, the duration of ignition is too short, oil circuit is not smooth, cell voltage is on the low side etc., the situation that there will be continuous several times starting ignition or long-time starting ignition, starter can produce the pulsating current that is greater than 500A while starting, make coil windings produce vibrations, produce high temperature simultaneously, can reach more than 300 ℃, conventionally, the coil windings of starter armature and the insulating barrier between iron core adopt C class F insulation paper, the highest can only bearing temperature 220 ℃, under the double action of vibrations and high temperature, insulating paper is softening, damaged, finally there is coil windings and iron core short circuit, now, the positive pole of power supply is directly linked armature spindle and the shell as power cathode by the connected coil windings of commutator segment, current surge, in addition, we know, the contact resistance of commutator segment is relatively large, the performance of holding heat is also relatively poor, during short circuit current process commutator segment, produce large spark, make commutator segment softening, wherein, always having a or two commutator segment takes the lead in damaging, cause that the row of jumping is that commutator segment perk departs from commutator, damage commutator, the final starter that damages.

Utility model content

The utility model, according to above not enough, provides a kind of rotor, and by armature spindle and iron core mutual insulating, electric flowing through coil winding, iron core, the armature spindle short circuit of having stopped anode are back to battery cathode.

The technical solution of the utility model is:

, comprising: armature spindle, iron core, be provided with insulating barrier between armature spindle, iron core.

For this insulating barrier can be set, between armature spindle, iron core, leave gap, can reduce the diameter of armature spindle, or, can expand the aperture of iron core, or the diameter that reduces armature spindle expands again the aperture of iron core, thereby reserve gap.

Insulating barrier can be that the form by injection moulding obtains, and also can first insulating barrier be processed, and refills and is fitted between armature spindle and iron core.

As one of scheme, described insulating barrier is comprised of some uniform arc plates.

Further, twist, the direction that rotor rotates meets can make air-flow enter in spirality to described arc plate.In the time of in air-flow enters spiral arc plate, heat can be taken away, reduce the internal temperature of rotor, particularly reduce the temperature of arc plate, further improve the insulation property of insulating barrier.

As preferably, the axial included angle A of described spirality and armature spindle is 15-30 degree.

As one of preferred version, described insulating barrier is hollow cylinder.This scheme is easy to process, processing cost is low.

Further, on the periphery of described hollow cylinder, offer some grooves.Can increase heat radiation gap.

As preferably, described insulating barrier is made by epoxy glass fiber.

The utility model also provides a kind of starter of engine, comprises starter housing, the carbon brush component of stator and end cap, also comprises described rotor.

The utlity model has simple in structure, cost is low, the beneficial effect of easy to process, high temperature resistance, long service life.

Accompanying drawing explanation

Fig. 1 is cutaway view of the present utility model.

Fig. 2 is the end view that the utility model insulating barrier adopts circular arc sheet.

Fig. 3 is the end view that the utility model insulating barrier adopts spirality circular arc sheet.

Fig. 4 is the end view that the utility model insulating barrier adopts hollow cylinder.

Fig. 5 is that the utility model insulating barrier adopts the end view with the hollow cylinder of groove.

Embodiment

Now by reference to the accompanying drawings the utility model is further described:

As shown in the figure, a kind of rotor, comprising: commutator 1, iron core 2 coil windings 4, armature spindle 5, be provided with insulating barrier 3 between armature spindle 5, iron core 2.

Insulating barrier 3 can be comprised of some uniform arc plates 31.

Arc plate can also be selected spirality 32, and the direction C that rotor rotates meets can make air-flow B enter in spirality.

Spirality 32 is 15-30 degree with the axial included angle A of armature spindle 5.

Insulating barrier 3 can also be selected hollow cylinder.

As one of embodiment, on the periphery of hollow cylinder, offer some grooves 33.

Insulating barrier 3 can select epoxy glass fiber to make.

A starter for engine, comprises starter housing, the carbon brush component of stator and end cap and above-mentioned rotor.

With a starter of rotor assembling of the present utility model, no-load running on testing stand, moved after 5 minutes, and spark has strengthened a little, but starter or normal operation; Continue to run until after 10 minutes, starter or normal operation, but starter temperature is very high.Out of service, take starter apart, find that rotor, commutator turn black, but commutator cylindrical or normal does not damage.

With a starter of rotor assembling of prior art, no-load running on testing stand, moving more than 4 minutes after clock, spark is very large, and starter can not run well.Take starter apart, find the row of jumping of commutator segment.

The utility model insulate between armature spindle 5 and iron core 2, when certain of the coil windings 4 in iron core 2 and iron core 2 are short-circuited, rotor integral body can not be short-circuited, while only having at least two place's coil windings 4 in iron core 2 to be short-circuited with iron core 2, rotor integral body just can affect, the particular location of two place's coil windings 4 is also depended in impact now, if two very approaching place's coil windings 4 of path be short-circuited also affect very little, therefore, the utility model greatly reduces short circuit probability, has extended useful life.

The foregoing is only preferred embodiment of the present utility model; with this, do not limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.

Claims

1. a rotor, comprising: armature spindle, iron core, is characterized in that, between armature spindle, iron core, be provided with insulating barrier, described insulating barrier is comprised of some uniform arc plates, and twist, the direction that rotor rotates meets can make air-flow enter in spirality to described arc plate.

2. a kind of rotor as claimed in claim 1, is characterized in that, the axial included angle A of described spirality and armature spindle is 15-30 degree.

3. a kind of rotor as described in claim 1-2 any one, is characterized in that, described insulating barrier is made by epoxy glass fiber.

4. a starter for engine, comprises and it is characterized in that starter housing, the carbon brush component of stator and end cap, also comprises the rotor described in claim 1-3 any one.