CN206806691U - A kind of electric tool commutator - Google Patents

Abstract

The utility model discloses a kind of electric tool commutator, including copper sleeve, rear end fastening bolt and Insulating gap, the inner surface of the copper sleeve is provided with insulating sleeve close to middle position, the left end of the insulating sleeve is provided with front end fastening bolt close to the middle position of copper sleeve, the outside of the copper sleeve is provided with V-arrangement mica ring close to middle position, and the outer surface of the V-arrangement mica ring is provided with commutator segment close to middle position；The utility model is scientific and reasonable, safe ready, the front end rear end of commutator is all fixed nut and fixed, the globality and use intensity of commutator are enhanced, commutator segment surface sets spaced hard and common conductive material so that brush reduces the abrasion to commutator segment in long-term work, and material joint easily forms oxide layer, the commutation of commutator is added, and it is not easy to wear, add the service life of commutator.

Description

A kind of electric tool commutator

Technical field

The utility model belongs to technical field of motors, and in particular to a kind of electric tool commutator.

Background technology

Commutator is commonly called as commutator, is direct current generator, is commutated as electric current on A.C. series motor, in order to allow electricity The part that motivation persistently rotates down, it is round that commutator is that several contact chips surround, and connect respectively on rotor each touches Head, two electrodes of outside connection are referred to as brush and contacted, while only contact two therein, after coil is by electric current, , when it, which goes to, is balanced with magnet, the line of electricity can be led to originally in the presence of permanent magnet, by attracting to rotate with repulsive force The contact relatively corresponded on commutator is just separated with brush, and brush is connected to corresponding to that group of coil for meeting and producing motive force On contact, so ceaselessly repeat down, dc motor is just turned over.

Commutator is rubbed in longtime running by brush, and abrasion is excessive will to make commutator segment surface produce commutation spark Damage commutator.

Utility model content

The purpose of this utility model is to provide a kind of electric tool commutator, to solve what is proposed in above-mentioned background technology Commutator is rubbed in longtime running by brush, and abrasion is excessive will to make commutator segment surface produce commutation spark damage commutation Device problem.

To achieve the above object, the utility model provides following technical scheme：A kind of electric tool commutator, including copper sheathing Cylinder, rear end fastening bolt and Insulating gap, the inner surface of the copper sleeve are provided with insulating sleeve close to middle position, institute The left end for stating insulating sleeve is provided with front end fastening bolt close to the middle position of copper sleeve, and the outside of the copper sleeve is close Middle position is provided with V-arrangement mica ring, and the outer surface of the V-arrangement mica ring is provided with commutator segment close to middle position, The outside of the commutator segment close to right-hand member be provided with piece between mica, the rear end fastening bolt be arranged on V-arrangement mica ring inner side Right-hand member uper side surface close to right-hand member close to copper sleeve, the outer surface of the rear end fastening bolt are provided with rear end fastening bolt External screw thread, the left side of the rear end fastening bolt are provided with V-arrangement steel loop, the Insulating gap point on the right side of V-arrangement mica ring Opening position of the cloth in the outside of V-arrangement mica ring close to commutator segment, the outer surface of the front end fastening bolt is close to insulating sleeve Left end at be provided with front end fastening bolt external screw thread, the uper side surface of the commutator segment is provided with hard commutation conductive layer, institute The uper side surface for stating commutator segment is provided with commutation conductive layer close to hard commutation conductive layer opening position, and the downside of the commutator segment is leaned on Two close end opening position is provided with mica ring neck, and the right side of the commutator segment is provided with mica on the upside of mica ring neck Piece.

Preferably, it is fixedly connected between the front end fastening bolt and copper sleeve.

Preferably, the uper side surface of the commutator segment is intervally distributed with hard commutation conductive layer and commutation conductive layer.

Preferably, it is fixedly connected between the V-arrangement mica ring and commutator segment by neck.

Preferably, it is fixedly connected between the rear end fastening bolt and V-arrangement steel loop.

Compared with prior art, the beneficial effects of the utility model are：The utility model is scientific and reasonable, safe ready, changes Nut is all fixed to the front end rear end of device to be fixed, and enhances the globality and use intensity of commutator, commutator segment surface Spaced hard and common conductive material are set so that brush reduces the abrasion to commutator segment, Er Qiecai in long-term work Material joint easily forms oxide layer, adds the commutation of commutator, and not easy to wear, and add commutator uses the longevity Life.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model；

Fig. 2 is commutator segment structural representation of the present utility model；

In figure：Cloud between 1- copper sleeves, 2- insulating sleeves, 3- front ends fastening bolt, 4-V shapes mica ring, 5- commutator segments, 6- pieces Mother, 7- rear ends fastening bolt external screw thread, 8- rear ends fastening bolt, 9-V shapes steel loop, 10- Insulating gaps, 11- front ends fastening bolt External screw thread, 12- hard commutation conductive layer, 13- commutations conductive layer, 14- mica rings neck, 15- mica sheets.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

Fig. 1 and Fig. 2 are referred to, the utility model provides a kind of technical scheme：Including copper sleeve 1, the and of rear end fastening bolt 8 Insulating gap 10, the inner surface of copper sleeve 1 are provided with insulating sleeve 2 close to middle position, and the left end of insulating sleeve 2 is close The middle position of copper sleeve 1 is provided with front end fastening bolt 3, and the outside of copper sleeve 1 is provided with V-arrangement cloud close to middle position Female ring 4, the outer surface of V-arrangement mica ring 4 are provided with commutator segment 5 close to middle position, and the outside of commutator segment 5 is set close to right-hand member It is equipped with mica 6 between piece, rear end fastening bolt 8 is arranged on the inner side of V-arrangement mica ring 4 close to right-hand member on the right-hand member of copper sleeve 1 Side surface, the outer surface of rear end fastening bolt 8 are provided with rear end fastening bolt external screw thread 7, and the left side of rear end fastening bolt 8 is leaned on The right side of nearly V-arrangement mica ring 4 is provided with V-arrangement steel loop 9, and Insulating gap 10 is distributed in the outside of V-arrangement mica ring 4 close to commutator segment 5 Opening position, the outer surface of front end fastening bolt 3 is provided with front end fastening bolt external screw thread at the left end of insulating sleeve 2 11, the uper side surface of commutator segment 5 is provided with hard commutation conductive layer 12, and the uper side surface of commutator segment 5 is conductive close to hard commutation 12 opening position of layer are provided with commutation conductive layer 13, and the downside of commutator segment 5 is provided with mica ring neck 14 at end positions, changed The upside of the close mica ring neck 14 in the right side of piece 5 is provided with mica sheet 15.

In order that external nut has a tightness to commutation utensil, in the present embodiment, it is preferred that front end fastening bolt 3 with It is fixedly connected between copper sleeve 1.

In order that the good long lifespan of commutator segment commutation property is obtained, in the present embodiment, it is preferred that the uper side surface interval of commutator segment 5 It is dispersed with hard commutation conductive layer 12 and commutation conductive layer 13.

In order that the globality of commutator segment and commutator must be ensured, in the present embodiment, it is preferred that V-arrangement mica ring 4 and commutation It is fixedly connected between piece 5 by neck.

In order that stationarity of the external nut to commutator is obtained, in the present embodiment, it is preferred that rear end fastening bolt 8 and V-arrangement It is fixedly connected between steel loop 9.

Mica sheet 15 in the utility model is made up of phengite, quartz, garnet and rutile etc., have insulation and The thermal resistance function of low loss, or good black matrix.

Operation principle and process for using of the present utility model：After the utility model installs, passed through using fixing nut Front end fastening bolt external screw thread 11 is spun on front end fastening bolt, is then taking a locknut to pass through rear end fastening bolt external screw thread 7 are spun on rear end fastening bolt 8, and then insulating sleeve 2 is enclosed on motor shaft, and brush is placed on commutator segment 5, installs electricity Machine can uses.

While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art, It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from principle of the present utility model and spirit, repaiied Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.

Claims (5)

1. a kind of electric tool commutator, including copper sleeve (1), rear end fastening bolt (8) and Insulating gap (10), its feature exist In：The inner surface of the copper sleeve (1) is provided with insulating sleeve (2), a left side for the insulating sleeve (2) close to middle position End is provided with front end fastening bolt (3) close to the middle position of copper sleeve (1), and the outside of the copper sleeve (1) is close to middle Opening position is provided with V-arrangement mica ring (4), and the outer surface of the V-arrangement mica ring (4) is provided with commutator segment close to middle position (5), the outside of the commutator segment (5) close to right-hand member be provided with piece between mica (6), the rear end fastening bolt (8) is arranged on V-arrangement Right-hand member uper side surface of the inner side of mica ring (4) close to right-hand member close to copper sleeve (1), the outside of the rear end fastening bolt (8) Surface is provided with rear end fastening bolt external screw thread (7), and the left side of the rear end fastening bolt (8) is close to the right side of V-arrangement mica ring (4) Side is provided with V-arrangement steel loop (9), and the Insulating gap (10) is distributed in the outside of V-arrangement mica ring (4) close to the position of commutator segment (5) Place is put, the outer surface of the front end fastening bolt (3) is provided with the left end of insulating sleeve (2) outside the fastening bolt of front end Screw thread (11), the uper side surface of the commutator segment (5) are provided with hard commutation conductive layer (12), the upside of the commutator segment (5) Surface is provided with commutation conductive layer (13) close to hard commutation conductive layer (12) opening position, and the downside of the commutator segment (5) is close Mica ring neck (14) is provided with end positions, the right side of the commutator segment (5) is set on the upside of mica ring neck (14) It is equipped with mica sheet (15).

A kind of 2. electric tool commutator according to claim 1, it is characterised in that：The front end fastening bolt (3) with Copper sleeve is fixedly connected between (1).

A kind of 3. electric tool commutator according to claim 1, it is characterised in that：The upside table of the commutator segment (5) Face is intervally distributed with hard commutation conductive layer (12) and commutation conductive layer (13).

A kind of 4. electric tool commutator according to claim 1, it is characterised in that：The V-arrangement mica ring (4) and commutation Piece is fixedly connected between (5) by neck.

A kind of 5. electric tool commutator according to claim 1, it is characterised in that：The rear end fastening bolt (8) and V Shape steel loop is fixedly connected between (9).