CN1005749B - Electric machine - Google Patents

Abstract

A motor has cylindrical conductive motor cover, its inner surface is equipped with the magnet and has a rotor to match with it, there is a non-conductive shroud to grasp the brush; the motor cover and the cover cap are matched at the joint surface of the cover cap, and the motor cover cap is provided with an end hole for leading the brush terminal piece out of the motor; and is provided with a conductive and substantially U-shaped cotter pin to enable the electric brush to be electrically connected with the motor cover; one leg of the conductive, substantially U-shaped cotter pin is inserted into the end hole from the inside of the cover cap after the brush terminal element is inserted into the end hole and secured in place, and the mating surface of the cover cap is inserted into the motor cover so that the other leg of the cotter pin will press against the inner wall of the motor cover when the motor cover is mated with the cover cap.

Description

Motor

The present invention relates generally to motor, particularly relate to this motor, being electrically connected between its center brush terminal and the motor cover is to realize with the pin of the opening that takes the shape of the letter U substantially, the leg and the composition surface that are this pin join, cover cap and motor cover are matched herein, another leg of pin then joins with a stomidium, and the brush terminal is promptly by drawing in this Kong Ercong motor.

In the micromachine, often need the grounding brush terminal.In this case, in the past say for example be will ground connection the brush terminal partly join with the conductive electrode cover that constitutes motor stator with going between.But this can bring the operation of many troubles, such as cutting lead-in wire to suitable length, at the two ends of each wiring lug plate will be arranged, and will join lead-in wire and motor cover and terminal with welding or other method, thereby produces the problem of operating efficiency.Its lead-in wire of position along with motor perhaps can stretch out in addition.As the means that address these problems, the applicant has proposed a kind of motor (Japanese utility model application number 57493/1982).In the motor of this kind prior art, substantially the split pin that takes the shape of the letter U is inserted into from the outside, Xiao a leg just engages that face joins so that cover cap and motor cover are matched like this, its another leg then joins with stomidium, this stomidium that is positioned on the cover cap is used for brush terminal piece is drawn motor, so that this brush and motor cover realize being electrically connected.

Solved aforesaid problem and reached its purpose really according to the motor of this prior art.But motor with this prior art, its be used for judging selectively relative angular position between the magnet that is configured in motor and brush some protruding to locating/recessed be to be positioned at cover cap and motor cover because the influence of projection piece only can make one of two brush terminal pieces (or anode or negative terminal) give ground connection.

The motor of this prior art in addition, be to be inserted into the electrical connection that composition surface and stomidium are realized motor cover and brush from the motor outside by the split pin that takes the shape of the letter U that will conduct electricity, therefore the cross-over connection face of its split pin might unexpectedly join with another electric conductor along with the position of motor, thereby constitutes undesirable short circuit phenomenon.Do not wish that from saying in appearance split pin is exposed to the outside of motor in addition yet.

Purpose of the present invention promptly provides a kind of motor, a magnet is housed and has disposed rotor in this motor that has a conductive electrode cover, and its cover cap rest brush; Its motor cover and cover cap are coupled to the place, a composition surface of cover cap; Its structure will be electrically connected with motor cover for brush when motor cover and cover cap connect in addition, has then utilized the split pin that takes the shape of the letter U of conducting electricity in motor cover.

Another object of the present invention provides a kind of motor, and wherein the split pin made from the bonding jumper with suitable resilience force has a long foot and a short leg; Its short leg is little outwardly-bent to guarantee that motor cover contacts with the good of brush terminal piece with respect to long foot.

Another purpose of the present invention provides a kind of motor, wherein all is furnished with a projection piece to guarantee that motor cover contacts with the good of brush terminal piece when assembling in each long outside with short leg of split pin.

Of the present invention also have a purpose to provide a kind of motor, wherein for the split pin locking is put in place, constitutes another projection piece in case the coming off of this split pin at the medial extremity of split pin long foot.

A further object of the present invention provides a kind of motor, wherein for the groove that matches with the short leg of split pin open with the outer peripheral face shoulder of the matched cover cap of motor cover, be and be made in the notch that the locking projections part on the split pin long foot matches and then open at the stomidium inner surface partly to guarantee that this split pin is positioned at the cover cap place.

The decomposition diagram of Fig. 1 helps to understand according to the present invention, the relation between its motor cover, cover cap and the split pin.

Fig. 2 is motor cover, cover cap and from the installation diagram of the inboard split pin of inserting of motor.

Fig. 3 implements motor phantom of the present invention, and the equipped state that puts in place of this split pin has been described.

Among Fig. 1, the cylindric motor cover that label 1 representative is made with electric conducting material (as iron); 2 and 2 ' represented comprise brush end boots 3 and 3 ' and brush substrate 4 and 4 ' brush; 5 and 5 ' represented the brush terminal piece that will draw from motor, so that the stomidium on being positioned at motor cover connects outside carrying out, this point will be illustrated hereinafter; 6 and 6 ' represented brush carriage, they be by with brush substrate 4 and 4 ' go up and terminal member 5 and 5 ' bent formation of a relative lateral bending so that brush and cover cap match, this puts and also will be illustrated hereinafter; 7 represent cover cap; 8 and 8 ' representative is formed at the stomidium on the cover cap 7; 9 and 9 ' represent the brush installation base, be used to make brush 2 and 2 ' brush carriage 6 and 6 ' matched with cover cap 7; 10 represent a composition surface so that cover cap 7 is matched with motor cover 1; The shaft hole that 11 representatives and machine shaft (not shown) match; 12 is a groove; 13 is that it takes the shape of the letter U substantially according to split pin of the present invention, and its long and short leg has projection piece P, to guarantee motor cover 1 and brush terminal piece 5(or 5 ' when the assembling) excellent electric contact (referring to Fig. 2).Split pin 13 is made by the bonding jumper that has suitable resilience force, and its short leg is outwardly-bent a little to guarantee motor cover 1 and brush terminal piece 5(or 5 ' with respect to long foot) good the contact.The long foot of split pin 13 has another projection piece U so that split pin 13 is locked in its medial extremity.Among this figure, the positioning convex spare of position, brush angle, X representative location.Y then represents the notch that matches with positioning convex spare X.

Can be from Fig. 2 clear seeing, be used for groove 15 that the short leg with split pin 13 matches and with split pin 13 long foot on the notch 16 that matches of the projection piece U that constitutes, all be made in the shoulder 14 of cover cap 7 outer peripheral faces, and just the connecting herein of cover cap 7 and motor cover 1.

In the motor as above-mentioned structure, utilize the split pin 13 that takes the shape of the letter U substantially to make motor cover 1 and brush terminal piece 5(5 ' according to following manner) realize being electrically connected.

Among Fig. 2, before cover cap 7 and motor cover 1 are joined, the long foot of split pin 13 be inserted stomidium 8 from the inboard of motor cover 7, and by giving fix in position built in the projection piece U of split pin 13 long foot ends and the connecting of notch 16 of cover cap 7.At this moment, the projection piece on the long foot of split pin 13 is crushed on the brush terminal piece 5 to improve the electrical connection of split pin 13 and brush terminal piece 5.

Next step inserts motor cover 1 with the cover cap 7 that has connected split pin 13 in the above described manner, arrives to the top of cover cap shoulder 14 up to the end face of motor cover 1.The short leg of split pin 13 just is embedded in the groove 15 like this.In this state, the projection piece P on the split pin 13 short legs is crushed on the madial wall of motor cover 1, with the further electrical connection that improves motor cover 1 and split pin 13.

Thereby insert and fully and motor cover 1 when connecting when cover cap 7, because the resilience force of the split pin 13 that takes the shape of the letter U substantially and owing to be made on the madial wall that the projection piece P of long and short leg outer surface is pressed in the inwall of stomidium 8 and motor cover 1 respectively, thereby realized being electrically connected between brush terminal piece 5 and the motor cover 1.

The state that the partial sectional view of Fig. 3 is illustrated, be the split pin 13 that takes the shape of the letter U substantially from cover cap is inboard connected with cover cap 7 after, the state that cover cap 7 and motor cover 1 are connected fully.The label of the similar elements of representing among the label shown in this figure and Fig. 1 is just the same.

As mentioned above, why the present invention may realize being electrically connected of motor cover and brush terminal piece, be that the split pin 13 that will take the shape of the letter U is substantially inserted stomidium 8 from the inboard of cover cap 7, thereby cause the long foot of split pin 13 and being electrically connected of brush terminal piece 5, then cover cap 7 is inserted in the motor cover 1, so just force the short leg of split pin to be pressed on the inwall of motor cover.

Utilize this kind configuration, need the motor of ground connection, just can utilize split pin 13 and make the positive and negative end ground connection of motor cover 1 and brush terminal piece 5 and give realization for those.

As mentioned above, comprise that the split pin 13 that will take the shape of the letter U substantially inserts the stomidium 8 that is arranged in motor cover 7 from the inboard of motor cover 7, the present invention just can realize being electrically connected motor cover 1 and brush terminal piece 5, and need not consider the notch on the motor cover 1 and the relative position of the projection piece on the cover cap 7, the two then is used to judge position, brush angle.This structure that the present invention in addition had is, split pin 13 is not exposed to the outside of motor cover 1, and cover cap 7 can not make split pin 13 unexpectedly join with other electric conductor, so just can make motor have identical outward appearance with the motor that the sort of no ground connection is connected.

Claims (6)

1, a kind of motor, it has the motor cover of a cylindrical shape conduction, and magnet is positioned at its inner surface and has a rotor to match with it, also has the non-conductive cover cap of a clamping brush in addition; Described motor cover is matched with described cover cap on the composition surface of described cover cap; It is characterized in that having stomidium on the described cover cap, brush terminal piece will be guided to its outside by this stomidium from the inside of motor, also be equipped with the split pin that takes the shape of the letter U substantially of conduction in addition, thereby realized being electrically connected of described motor cover and described brush; A leg of the split pin of conducting electricity and taking the shape of the letter U substantially is inserted into described stomidium and fix in position from the inboard of described cover cap; And when described cover cap faying face is inserted into described motor cover, another leg of described split pin will be forced to be pressed on the inwall of described motor cover so that described motor cover and described cover cap are matched.

2, motor as claimed in claim 1 is characterized in that described split pin is the bonding jumper that takes the shape of the letter U substantially with suitable resilience force, and includes a long foot and a short leg; Described short leg is little outwardly-bent with respect to long foot.

3, motor as claimed in claim 2 is characterized in that the long foot of described split pin and/or the outer surface of short leg respectively dispose projection piece.

4, motor as claimed in claim 2 is characterized in that the promising projection piece of fixing this split pin of internal surface configurations of described split pin long foot end.

5, motor as claimed in claim 2 is characterized in that the shoulder place on the matched described cover cap outer peripheral face of described cover cap and motor cover, has one to be used for and the matched groove of the short leg of described split pin.

6, motor as claimed in claim 4 is characterized in that having on the described cover cap notch, so that to be used for the projection piece of fastening described split pin matched with being made in described split pin long foot end inner surface.

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