CN202513718U

CN202513718U - Electric brush supporting device with capacitance elements and direct current micro motor

Info

Publication number: CN202513718U
Application number: CN 201220043077
Authority: CN
Inventors: 谢伟; 陈军
Original assignee: Dongming Mechanical and Electrical (Shenzhen) Co Ltd
Current assignee: Dongming Shenzhen Electromechanical Ltd By Share Ltd
Priority date: 2012-02-10
Filing date: 2012-02-10
Publication date: 2012-10-31
Anticipated expiration: 2022-02-10

Abstract

The utility model provides a direct current micro motor comprising a casing, a rotor component and an electric brush supporting device with capacitance elements. The electric brush supporting device also comprises an end cap, two capacitance elements, electric brush fixing pieces which are symmetrically fixed at two positions in the end cap, and two electric brushes which are respectively fixed on the two electric brush fixing pieces. The positions which are fixed with the electric brush fixing pieces are respectively provided with an axial projection. When the two electric brush fixing pieces are respectively fixed in the end cap, each axial projection of the end cap is respectively embedded into a gap of the two electric brush fixing pieces. One leg of each of the two capacitance elements is respectively positioned in the respective gap of the two electric brush fixing pieces, and is respectively pressed and fixed by a top surface of each axial projection of the end cap and a respective connecting convex part inner surface of the two electric brush fixing pieces. According to the electric brush supporting device and the direct current micro motor, the capacitance elements of the direct current micro motor and the electric brush fixing pieces are firmly fixed, and in an operation process of the motor, electromagnetic interferences to other devices in an ambient environment caused by instable contact of the capacitance elements with the electric brush fixing pieces is not generated.

Description

The brush supporting arrangement and the direct current micromotor of equipment capacity cell

[ Technical field]

The utility model relates to direct current micromotor, particularly relates to the supporting of direct current micromotor or the device of protection brush or brush carrier, relates in particular to the brush supporting arrangement of direct current micromotor, also relates to the direct current micromotor of equipping this brush supporting arrangement.

[ Background technology]

Direct current micromotor is because of will (being the abbreviation of Electro-Magnetic Compatibility through EMC; The Chinese meaning is an electromagnetic compatibility) test; The prior art direct current micromotor normally increases the Resistor-Capacitor Unit that anti-interference effect is arranged, like fixing respectively capacity cell on the two brush stators (so-called " brush arm ") of direct current micromotor.Prior art is fixed on capacity cell on the brush stator and adopts welding manner; Be difficult to burn-on when welding with flatiron usually; But also cause the phenomenon of rosin joint and dry joint easily; It is unstable to cause capacity cell to contact with the brush stator, defective when this motor carries out the EMC test, makes equipment or system that this motor is housed when operation, produce electromagnetic interference to the miscellaneous equipment in its surrounding environment.

[ The utility model content]

The technical problem that the utility model will solve is to avoid the weak point of above-mentioned prior art and a kind of brush supporting arrangement and direct current micromotor of equipping capacity cell is provided; Capacity cell and brush stator are fixed; Motor can not contact unstable to the generation of the miscellaneous equipment in its surrounding environment electromagnetic interference because of capacity cell in running with the brush stator.

The technical scheme that the utility model solve the technical problem employing is:

A kind of brush supporting arrangement of equipping capacity cell is provided, is used for direct current micromotor, comprise end cap, two pieces of capacity cells, be fixed on brush stator and two brushes at two places in this end cap symmetrically; Said brush stator comprises cantilever, terminals and the middle transition sheet that is connected with said cantilever, and with said terminals and middle transition sheet be linked together connection convex part, gapped between said terminals and the middle transition sheet; The terminals of said brush stator axially stretch out in said end cap; Two brushes are separately fixed on the inner face of cantilever front end of two brush stators; The fixing two brush stator places of said end cap are provided with axial projection respectively; When said two brush stators are separately fixed in the said end cap, in the gap of the said two brush stators of each self-embedding of each axial projection of said end cap; Each one leg of two capacity cells lays respectively in the said two brush stator gaps separately, and is fixed by each axial raised end face of said end cap and said two brush stators connection convex part inner face separately respectively.

A kind of direct current micromotor also is provided, comprises the brush supporting arrangement of housing, rotor assembly and equipment capacity cell; The brush supporting arrangement of said equipment capacity cell comprises end cap, two pieces of capacity cells again, is fixed on brush stator and two brushes at two places in this end cap symmetrically; Said brush stator comprises cantilever, terminals and the middle transition sheet that is connected with said cantilever, and with said terminals and middle transition sheet be linked together connection convex part, gapped between said terminals and the middle transition sheet; The terminals of said brush stator axially stretch out in said end cap; Two brushes are separately fixed on the inner face of cantilever front end of two brush stators; Under the elastic force effect of said each brush stator, said each brush head slides with the commutator face of said rotor assembly symmetrically and electrically contacts; The fixing two brush stator places of said end cap are provided with axial projection respectively; When said two brush stators are separately fixed in the said end cap, in the gap of the said two brush stators of each self-embedding of each axial projection of said end cap; Each one leg of two capacity cells lays respectively in the said two brush stator gaps separately, and is fixed by each axial raised end face of said end cap and said two brush stators connection convex part inner face separately respectively; Said two capacity cells other one leg separately radially pass the said housing of back electrical connection from the corresponding breach of said end cap respectively.

Compare with prior art, the brush supporting arrangement of the utility model equipment capacity cell and the beneficial effect of direct current micromotor are:

Specially axial projection is set respectively, each one leg of two capacity cells is fixed by each axial raised end face of said end cap and two brush stators connection convex part inner face separately respectively at the fixing two brush stator places of end cap; When this fixed form has overcome prior art and has adopted welding manner with the flatiron welding be difficult to burn-on, the phenomenon of rosin joint and dry joint; The utility model capacity cell and brush stator are fixed, and motor can not contact unstable to the generation of the miscellaneous equipment in its surrounding environment electromagnetic interference because of capacity cell in running with the brush stator.

[ Description of drawings]

Fig. 1 is the axonometric projection sketch map of brush supporting arrangement of the equipment capacity cell of the utility model direct current micromotor;

Fig. 2 is the main sketch map of looking of the orthographic projection of said brush supporting arrangement;

Fig. 3 is the axonometric projection sketch map of the end cap 100 of said brush supporting arrangement;

Fig. 4 is the axonometric projection sketch map of the brush stator 300 of said brush supporting arrangement.

[embodiment]

Below in conjunction with each accompanying drawing the utility model is done further explain.

Referring to Fig. 1 to Fig. 4, a kind of direct current micromotor comprises the brush supporting arrangement of housing (not shown), rotor assembly (not shown) and equipment capacity cell; The brush supporting arrangement of said equipment capacity cell comprises end cap 100, two pieces of capacity cells 500 again, is fixed on brush stator 300 and two brushes 200 at two places in this end cap 100 symmetrically; Said brush stator 300 comprises cantilever 310, terminals 320 and the middle transition sheet 330 that is connected with said cantilever 310; And with said terminals 320 and middle transition sheet 330 be linked together connection convex part 340, between said terminals 320 and the middle transition sheet 330 gapped 350; The terminals 320 of said brush stator 300 axially stretch out in said end cap 100; Two brushes 200 are separately fixed on the inner face 3111 of cantilever 310 front ends 311 of two brush stators 300; Under the elastic force effect of said each brush stator 300, said each brush 200 head slide with the commutator (not shown) surface of said rotor assembly symmetrically and electrically contact; Said end cap 100 fixing two brush stators, 300 places are provided with axial projection 110 respectively; When said two brush stators 300 are separately fixed in the said end cap 100, in the gap 350 of the said two brush stators 300 of each axial projection 110 each self-embedding of said end cap 100; Each one leg 510 of two capacity cells 500 lays respectively in said two brush stators 300 gap 350 separately, and is fixed by the end face of each axial projection 110 of said end cap 100 and said two brush stators 300 connection convex part 340 inner faces 341 separately respectively; Said two capacity cells 500 other one leg 520 separately radially pass the said housing of back electrical connection from the corresponding breach 120 of said end cap 100 respectively.

Among Fig. 1 and Fig. 2 label be 400 be two vibration isolation rubbers 400, this two vibration isolation rubber 400 is separately fixed on the back side 3121 of cantilever 310 rear ends 312 of said two brush stators 300, these vibration isolation rubber 400 good springiness and high temperature resistant.The vibration isolation rubber 400 that is fixed on brush stator 300 has damping action; When motor in when operation; Will weaken the vibration of brush stator 300, thereby it is more stable that brush 200 is contacted with commutator, improved the useful life of brush 200; Also make the direct current micromotor performance more stable, noise also can correspondingly reduce.

The above embodiment has only expressed the preferred implementation of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim; Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection range of the utility model; Therefore, all equivalents and modifications of being done with the utility model claim scope all should belong to the covering scope of the utility model claim.

Claims

1. a brush supporting arrangement of equipping capacity cell is used for direct current micromotor, comprises end cap (100), two pieces of capacity cells (500), is fixed on brush stator (300) and two brushes (200) at two places in this end cap (100) symmetrically; Said brush stator (300) comprises cantilever (310), terminals (320) and the middle transition sheet (330) that is connected with said cantilever (310); And with said terminals (320) and middle transition sheet (330) be linked together connection convex part (340), between said terminals (320) and the middle transition sheet (330) gapped (350); The terminals (320) of said brush stator (300) axially stretch out in said end cap (100); Two brushes (200) are separately fixed on the inner face (3111) of cantilever (310) front end (311) of two brush stators (300); It is characterized in that:

The fixing two brush stators (300) of said end cap (100) locate to be provided with respectively axial projection (110); Said two brush stators (300) are separately fixed at said end cap (100) when interior, in the gap (350) of the said two brush stators (300) of each self-embedding of each axial projection (110) of said end cap (100); Each one leg (510) of two capacity cells (500) lays respectively in said two brush stators (300) gap (350) separately, and is fixed by end face of each axial projection (110) of said end cap (100) and said two brush stators (300) connection convex part (340) inner face (341) separately respectively.

2. direct current micromotor comprises the brush supporting arrangement of housing, rotor assembly and equipment capacity cell; The brush supporting arrangement of said equipment capacity cell comprises end cap (100), two pieces of capacity cells (500) again, is fixed on brush stator (300) and two brushes (200) at two places in this end cap (100) symmetrically; Said brush stator (300) comprises cantilever (310), terminals (320) and the middle transition sheet (330) that is connected with said cantilever (310); And with said terminals (320) and middle transition sheet (330) be linked together connection convex part (340), between said terminals (320) and the middle transition sheet (330) gapped (350); The terminals (320) of said brush stator (300) axially stretch out in said end cap (100); Two brushes (200) are separately fixed on the inner face (3111) of cantilever (310) front end (311) of two brush stators (300); Under the elastic force effect of said each brush stator (300), said each brush (200) head slides with the commutator face of said rotor assembly symmetrically and electrically contacts; It is characterized in that:

The fixing two brush stators (300) of said end cap (100) locate to be provided with respectively axial projection (110); Said two brush stators (300) are separately fixed at said end cap (100) when interior, in the gap (350) of the said two brush stators (300) of each self-embedding of each axial projection (110) of said end cap (100); Each one leg (510) of two capacity cells (500) lays respectively in said two brush stators (300) gap (350) separately, and is fixed by end face of each axial projection (110) of said end cap (100) and said two brush stators (300) connection convex part (340) inner face (341) separately respectively; Said two capacity cells (500) other one leg (520) separately radially pass the said housing of back electrical connection from the corresponding breach (120) of said end cap (100) respectively.