CN2481022Y

CN2481022Y - Improved carbon brush holder

Info

Publication number: CN2481022Y
Application number: CN 01226992
Authority: CN
Inventors: 廖树城; 游孟萩
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-13
Filing date: 2001-06-12
Publication date: 2002-03-06
Anticipated expiration: 2011-06-12

Abstract

An improved carbon brush holder comprises a receiving seat, two carbon brushes, two constantforce springs and two conducting elements, wherein two sides of an opening of the containing seat are respectively provided with a receiving and limiting part, each receiving and limiting part is provided to receive the carbon brush and the constantforce spring which provides a certain propulsion force to push the carbon brush moving forward the opening, to promote the center point of the cross-section of the carbon brush to contact a commutator at any time, and the conducting elements are covered on the top surfaces of the carbon brushes and the constantforce springs, and has the effect of positioning frame.

Description

The carbon brush retainer of improvement

The utility model is relevant with carbon brush retainer structure, the more detailed carbon brush retainer that is meant a kind of improvement.

Press, see also shown in Figure 1, it is the end face schematic diagram of existing carbon brush retainer, this carbon brush retainer is provided with an opening 1a in a pedestal 1 and places for a commutator 2, and this pedestal 1 is provided with two reeds 3 that are oppositely arranged, these each reed 3 one ends are connected with a lead (figure does not show), the one free end then is installed with a carbon brush 4, impel the end face of these carbon brush 4 tightly to be posted by on this stream 2 by the strength that reed 3 is replied, when rotating with convenient commutator 2, the effect of carbon brush makes the sense of current that circulates in armature coil (Armature Coil) oppositely change:

Really, this carbon brush 4 amplexiforms on this commutator 2 by the back stretch of this reed 3 and reaches aforementioned purpose, and only, this reed 3 is the form formation with cantilever spring.Therefore this carbon brush 4 also can't be with section central point conflict commutator 2, it is inhomogeneous easily to form contact-making surface, what is more, when carbon brush 4 shortened its length because of long-term abrasion, this kind phenomenon was more serious, and it will cause this carbon brush 4 to contact bad with 2 in this commutator, cause mechanical operation not normal, even between carbon brush 4 and commutator 2, having the situation generation that electric arc produces, the situation that is misplaced that has non-contravention what is more produces, and finally causes the shortcoming of effect shakiness.

See also another existing carbon brush retainer structure of Fig. 2 again, it is installed with a coil tension spring 6 by a cylindrical shell 5 inside and outwards contacts on the commutator 8 with pushing tow one carbon brush 7, and the lead 7a on this carbon brush 7 is connected conducting with a guide card 9 again after passing this coil tension spring 6.Really, utilize this cylindrical shell 5 to advance with straight line path by this carbon brush 7 of being arranged so that of this coil tension spring 6, and its section central point this commutator 8 of conflicting really.Only, this lead 7a must be reserved with certain length at these coil tension spring 6 places, is communicated with use to deal with the carbon brush 7 that phases down length.Therefore, this lead 7a is winding to be placed through among this coil tension spring 6, right this situation but causes this

lead

7a and 6 of this coil tension springs to produce interference mutually easily, and this cylindrical shell 5 is simultaneously ccontaining this coil tension spring 6 and this carbon brush 7, seems so its stack shell is designed to have certain length and occupies the space.

Main purpose of the present utility model is to provide a kind of carbon brush retainer of improvement, and it is respond well that it makes that carbon brush contacts with commutator.

Again, secondary objective of the present utility model is to provide a kind of carbon brush retainer of improvement, and it effectively utilizes the space.

Edge to be reaching above-mentioned purpose, the carbon brush retainer of a kind of improvement provided by the utility model, and it includes: an accommodation seat has an opening, and is respectively equipped with a tolerance limit portion and a perforation of same structure in these opening both sides; Wherein, this tolerance limit portion is made up of a tank that is connected with and a guide groove, and this guide groove has an open end and communicates with this opening; Two carbon brush be to be placed in respectively among this guide groove, but its this each carbon brush such as pushing tow such as grade are towards this opening direction slippage; Two electric-conductors, it has an Extendible flake that passes this accommodation seat perforation, and the free termination of lead on this conducting strip and this carbon brush is established; By said structure, make the carbon brush balance paste and be butted on the commutator, and reach the respond well purpose of contact.

Wherein this accommodation seat is to establish a flat board in a framework, and this flat board is provided with this opening and these perforation that runs through, and the tank of these tolerance limit portions and guide groove are to be respectively on this flat board to establish and be arranged with downwards and form with protruding wall circle.

Wherein should also be respectively equipped with two perforations by flat board on this opening dual-side, and this electric-conductor is to have extended this Extendible flake downwards and two cards are established sheet in a roof perimeter, these lamellar bodies pass this perforation and perforation, and electric-conductor is and hides and spacing carbon brush and this constant force spring.

Wherein should be provided with this perforation and these perforations in protruding wall periphery by flat board, and this protruding wall is provided with a breach, this electric-conductor card is wherein established the free termination of sheet and this brush lead and is established, and this this lead of breach confession passes through.

Wherein the card of this electric-conductor is established tool one hook part, sheet bottom, and after card was established sheet and passed perforation, this hook part was colluded and is butted on this planar bottom surface.

Below, enumerate preferred embodiment of the present utility model now, and after cooperating following accompanying drawing to be described in more detail in, wherein:

Fig. 1 is the end face schematic diagram of existing a kind of carbon brush retainer.

Fig. 2 is the structural representation of existing another kind of carbon brush retainer.

Fig. 3 is the exploded perspective view of the utility model one preferred embodiment.

Fig. 4 is the combination stereogram of the above-mentioned preferred embodiment of the utility model.

Fig. 5 does not organize the end face schematic diagram that is provided with electric-conductor for the above-mentioned preferred embodiment of the utility model.

See also Fig. 3,4 and shown in Figure 5, the carbon brush retainer 100 of improvement that the utility model provides is made up of an accommodation seat 10, two carbon brush 20, two constant force springs 30 and two electric-conductors 40; Wherein:

This accommodation seat 10 is to form by establishing a flat board 12 in the circular framework 11; These flat board 12 middle positions are provided with a long rectangular aperture 13, and are respectively equipped with a tolerance limit portion 14 and a perforation 15 of same structure in these opening 13 both sides, and:

This tolerance limit portion 14 has and is connected with a tank 141 and a guide groove 142; This tank 141 is to be respectively on this flat board 12 to establish and be arranged with downwards and form with protruding wall circle with this guide groove 142, this guide groove 142 is to pass through and cuts this tank 141 again, make this tank 141 be formed with left and right receiving part 141a, 141b, this guide groove 142 has an open end 142a and communicates with this opening 13;

In addition, the protruding wall epimere that forms this left side receiving part 141a has a breach A, and should be distributed with perforation 15 and two perforations 16,17 that run through this flat board 12 in protruding wall periphery to be triangulation point by flat board 12.

These carbon brush 20 are to be placed in respectively respectively among this guide groove 142, and it equals on the side fragment position and be to be located at the rear and to be connected with a lead 21.

These constant force springs 30, be respectively to establish a left and

right volume end

32,33 to form in a pushing tow face 31 two ends, this left and

right volume end

32,33 distinctly is located among this left and right receiving part 141a, 141b and is kept out by its protruding perseverance spacing, and this with push away face 31 be positioned at these carbon brush 20 rears and with fixing this carbon brush 20 of thrust pushing tow towards these opening 13 direction slippages.

And these electric-conductors 40, be to have extended an Extendible flake 42 downwards and two cards are established

sheet

43,44 in a top board 41 peripheries, these cards are established

sheet

43,41 bottoms and are had a hook part 431,441 of overhead kick shape, after establishing

sheet

43,44 and pass this perforation 15 and these perforations 16,17 respectively with box lunch this Extendible flake 42 and these cards, and, this each hook part 431,441 is colluded and is butted on these flat board 12 bottom surfaces, so will make electric-conductor 40 be and hide and spacing this carbon brush 20 and this constant force spring 30, and this electric-conductor 40 firmly combines with this flat board 12; In addition, the lead 21 of this carbon brush 20 in pass and be this breach A that bridges after establish sheet 43 with this card and be connected, and these Extendible flake 42 bottoms connect a lead (figure does not show), basic this makes overall structure be conducting state.

See also shown in Figure 5 again, it is the application schematic diagram of the utility model carbon brush retainer 100, in this diagram, these electric-conductors 40 are not shown, be the relevant action of relative folder by the pushing tow of this constant force spring 30 respectively by a commutator 200 conveniently to detect these carbon brush 20.

Be with, above-mentionedly be the carbon brush retainer structure of the utility model improvement and the explanation of associated location thereof.Then, again advantage of the present utility model is illustrated in the back:

1. the utility model utilizes this constant force spring with left and right volume end 32 30 to act on this carbon brush 20 so that certain pushing tow strength to be provided, impel the section central point of this carbon brush 20 to remain on the state that certain ironsmith touches this commutator 200 at any time, its improvement is commonly used with single reed or coil tension spring when the pushing tow, the carbon brush section central point skew of when meeting carbon brush abrasion foreshortened length, easily deriving, and spring push strength diminishes and causes the shortcoming of loose contact.

2. the utility model is connected to the two ends of this lead 21 on the side of this carbon brush 20 and these electric-conductor 40 cards are established on the sheet 43, and this lead 21 is and is cross-placed on this breach A.Therefore, when this carbon brush 20 shortens length because of abrasion and moved by these constant force spring 30 pushing tows outwardly, and when pulled, this lead 21 can follow this breach A to move to this lead 21 with these carbon brush 20 displacements, and it does not have similar commonly using easily has the puzzlement situation of interfering and taking up space to take place.

In sum, the utility model is real in like product to have its progressive practicality, and uses and go up conveniently, again, the utility model there is no identical items and sees in publication or public use before application, be with, the real condition that has possessed novel patent of the utility model is so file an application in accordance with the law.

Only, the above only is a preferable possible embodiments of the present utility model, changes so use the equivalent structure that the utility model specification and claim do such as, ought to be included in the claim of the present utility model.

Claims

1. the carbon brush retainer of an improvement is characterized in that it includes:

One accommodation seat has an opening, and is respectively equipped with a tolerance limit portion and a perforation of same structure in these opening both sides; Wherein, this tolerance limit portion is made up of a tank that is connected with and a guide groove, and this guide groove has an open end and communicates with this opening;

Two carbon brush are to be placed in respectively among this guide groove, and its grade is connected with a lead respectively;

But this each carbon brush of two pushing tows is towards the constant force spring of this opening direction slippage, is to be located in respectively among this tank;

Two electric-conductors, it has an Extendible flake that passes this accommodation seat perforation, and the free termination of lead on this conducting strip and this carbon brush is established.

2. according to the carbon brush retainer of the described improvement of claim 1, it is characterized in that, this accommodation seat is to establish a flat board in a framework, and this flat board is provided with this opening and these perforation that runs through, and the tank of these tolerance limit portions and guide groove are to be respectively on this flat board to establish and be arranged with downwards and form with protruding wall circle.

3. according to the carbon brush retainer of the described improvement of claim 2, it is characterized in that, this flat board also is respectively equipped with two perforations on this opening dual-side, and this electric-conductor is to have extended this Extendible flake downwards and two cards are established sheet in a roof perimeter, these lamellar bodies pass this perforation and perforation, and electric-conductor is covering and spacing carbon brush and this constant force spring.

4. according to the carbon brush retainer of the described improvement of claim 3, it is characterized in that this flat board is provided with this perforation and these perforations in protruding wall periphery, and this protruding wall is provided with a breach, this electric-conductor card is wherein established the free termination of sheet and this brush lead and is established, and this breach passes through for this lead.

5. according to the carbon brush retainer of the described improvement of claim 3, it is characterized in that the card of this electric-conductor is established tool one hook part, sheet bottom, after card was established sheet and passed perforation, this hook part was colluded and is butted on this planar bottom surface.