CN102474060A

CN102474060A - Brushholder for an electrical machine

Info

Publication number: CN102474060A
Application number: CN2010800333442A
Authority: CN
Inventors: G.卡斯廷格; M.许斯格斯; M.奥伯特; D.劳克; K.里丁格
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2009-07-22
Filing date: 2010-05-25
Publication date: 2012-05-23
Anticipated expiration: 2030-05-25
Also published as: WO2011009656A1; DE102009027909A1; EP2457295A1; CN102474060B; BR112012001261A2

Abstract

Electrical machines in which the brushes are connected to a loose copper litz wire are known. However, the procedure for making contact with a loose end of the copper litz wire is involved in the manufacturing and fitting process. As an improvement, the invention proposes a brushholder (1) for an electrical machine which has a spring lever (3), on which a brush (2) is held on a fastening section (5), electrical contact being made with said brush by means of a litz wire (10). According to the invention, one end (26) of the litz wire (10) is welded to the spring lever (3), with the result that there is a complete structural unit with which contact is then more easily made for the manufacturing and fitting process. The brushholder according to the invention is provided for electrical machines, in particular in windshield wiper motors.

Description

The brush holder that is used for motor

Prior art

The present invention relates to a kind of according to claim 1 brush holder that is used for motor as described in the preamble and a kind of according to the described motor of claim 7 with such brush holder.

From the known heteroid brush holder that is used for motor of prior art.This brush holder has the carbon brush that is used to electrically contact is bearing in the function between the parts of fixing parts and rotation.

From constitute such DE 10 2,004 063 809A1, disclose a kind of brush holder that is used for motor, it has spring lever.On said spring lever, brush at the canned paragraph upper support.Said brush electrically contacts by means of twisted wire.Said twisted wire partly is fixed on the spring members through electric welding, soldering or stickup, in order that can carry out damping through twisted wire to the vibration that on brush, occurs through this measure.The connection of twisted wire itself can carried out in the brush holder device in the regulation of motor outside away from brush holder on its loosening end with disclosed mode.

Therefore, require when brush holder being installed in the brush holder device at first that the loosening end of pair twist zygonema positions, for example be connected with metal insert in order that be right after to land in order to contact.For example independent clamping element is used for positioning for the loosening end of twisted wire.This clamping part at first clamps the loosening end of twisted wire, in order that and then for example through welding it is connected with metal insert.This loosening end at twisted wire produces the mode that is electrically connected and particularly when producing in enormous quantities, takes a lot of trouble as a kind of operation that connects.In addition, be difficult for operation when mounted, because must give much attention to this loosening and free movable end and the installation of twisted wire on carbon brush as the brush holder of bulk product.

Disclosure of the present invention

By comparison, have following advantage, no longer exist the end of unclamping of the twisted wire of the brush holder that is used to contact according to motor of the present invention, that have claim 1 or brush holder claim 7 characteristic, that be used for motor or have a this brush holder.Simplify the connection operation when making electrical connection significantly through this measure, so just reduced expense and cost.Advantageously can abandon up to the present insert essential in the brush holder device.Can simplify the production of motor significantly through this measure.Install also simplyr, particularly have brush holder that is prefabricated into or brush holder spring bar, and therefore do not have the loosening parts or the loosening end of twisted wire with the copper twisted wire that has contacted.Said loosening parts or loosening end have increased the difficulty that connects operation when producing motor or operation as the brush holder of bulk product.Can directly on spring lever, accomplish simply and reliably with the generation that is electrically connected of carbon brush.Exist a kind of completely and in back to back manufacturing process and installation procedure, can treat the contacting structure unit more simply, this construction unit is made up of the twisted wire of brush holder with brush and welding.

Obtain other advantage of the present invention and favourable scheme by dependent claims and specification.

Very for advantageously; Construct agley on spring lever classification shape ground on its end that is opposite to brush; Through the contact-segment or the welded gasket (Schweisspad) on this measure formation plane, the loosening end that extend on the correspondingly plane of twisted wire can be welded on described contact-segment or the welded gasket with simple mode and method.

Advantageously, the contact-segment of the plane of spring lever extension has the width b than twisted wire at horizontal direction _LBigger width b, through this measure, except said good welding, in principle also can be so that on this side, contact.

Advantageously, can produce and being electrically connected of brush through the contact on the contact-segment of spring lever, like this, just can abandon otherwise in the brush holder device that is made of plastics usually desired additional contact (metal insert).In this case, when brush holder was in the state that is installed in the brush holder device, a kind of eliminating disturbed available its end of choke (Entst rdrossel) to be close to simply on the contact-segment of spring lever, and so produced and being electrically connected of brush.Through smooth contact-segment or welded gasket, particularly in order to disturb choke to contact and to produce enough contact surfaces for a kind of the eliminating.

When brush holder has spring section or supporting section; And when said spring section or supporting section include substantially the segment section on set axle journal design circularly, that be used to be installed in the brush holder device, can brush holder be installed and be bearing in the brush holder device simply and reliably.

Accompanying drawing

In the specification below a kind of embodiment of the present invention is carried out more detailed elaboration, and proceed explanation by means of accompanying drawing.

These accompanying drawings illustrate:

Fig. 1 a: according to the perspective view of brush holder of the present invention;

Fig. 1 b: corresponding lateral plan;

Fig. 2: two be installed in the brush holder device according to brush holder of the present invention.

Execution mode of the present invention

The invention describes a kind of brush holder 1 that is used for brush 2, particularly carbon brush.Said brush with disclosed mode in motor or generator during sliding contact and the parts of the rotation of machine-produce like the current-collector of rotor or armature or collector ring and to electrically contact.

Brush holder 1 shown in Fig. 1 a and Fig. 1 b has the spring lever 3 as punch components.Said spring lever totally is that hook-type or V-arrangement ground are crooked.Spring lever 3 is processed by spring steel, and to the left can be divided into spring or the supporting section 6 of brush canned paragraph 5, V-arrangement from the right side and opposed and form the crooked contact-segment 7 that is classified to of foot with brush 2.Carry electric current for brush 2 through twisted wire 10, particularly copper twisted wire, said copper twisted wire for example has many single copper wires.

The brush canned paragraph 5 of spring lever 3 splits, and the opening 11 in the middle of occupying is arranged between two side members 12 in other words.The brush 2 of square grading design passes said opening.The upper side 15 from brush canned paragraph 5 of brush 2 stretches out bigger square section 16 when installment state and the rotor of motor or armature realize electrically contacting.Over there, less square section 17 of brush 2 usefulness passes opening 11.

Bigger square section 16 of brush 2 is bearing on the brush canned paragraph 5 by means of two side surfaces 20 by upper side 15 corner bends of brush canned paragraph 5.

The spring section that brush canned paragraph 5 carries out the transition to V-arrangement is in other words in the supporting section 6, this supporting section have circular bend substantially, almost formed a kind of segment section 9 of circle of sealing.

As in Fig. 2, illustrating in further detail, have circular bend portion's section 9 the spring section in other words supporting section 6 be used to hold the axle journal 22 of brush holder device 23 of the regulation of brush holder 1 usefulness.In addition, brush holder device 23 for example is made of plastics, and is a kind of working of plastics or support plate.

As Fig. 1 a, 1b illustrated, spring section supporting section 6 in other words carried out the transition to the contact-segment 7 of stairstepping or corner bend.Said contact-segment forms a kind of plane 25 of high shape in end side.According to the present invention, the end 26 that extend on the plane of present said twisted wire 10 is welded on the plane 25 of the high platform shape on its upper side 27, then just there has not been loosening end, but the end 26 of well secured is arranged.Like this, the plane 25 or the contact-segment 7 of high platform shape have formed the welded gasket (Schweisspad) in welding process.

Preassembled brush holder 1 or brush holder spring bar with the copper twisted wire 10 that has contacted have just been arranged after welding process.No longer include the loosening in other words end of loosening parts of twisted wire 10, and these loosening ends are being made motor or can increased the difficulty that connects operation in operation during as the brush holder of bulk parts.Like this, just for manufacturing process and installation procedure provide a kind of complete, and then can treat the contacting structure unit more simply, said construction unit by the brush with brush 22 with weld the twisted wire 10 that finishes and constitute.

As being shown specifically among Fig. 2, producing electrical connection for carbon brush 2 can simply and reliably directly take place on spring lever 3 in the installment state of brush holder 1.Fig. 2 shows two of being installed in the brush holder device 23 according to of the present invention and have a vertical view of the brush holder 1 of brush 2.Said eliminating disturbs element, particularly eliminating to disturb coil or eliminating to disturb choke 30 directly to be connected with brush holder 1.Said eliminating disturbs choke 30 to be integrated in the brush holder device 23, through this measure because spatially near brush 2, so improved efficient.These two get rid of to be disturbed chokes for example to be made up of the circle silk thread, and the plane 25 that for example is close to high platform shape with its end 31 perhaps on the upper side 27 of contact-segment 7 with compressing.Likewise can contact with the downside 28 on the plane 25 of high platform shape.The contact-segment 7 that extend on the plane of spring lever 3 is seen the width b that has than twisted wire 10 along horizontal direction Q _LBigger width b.

Brush holder 1 according to the present invention is used for motor, particularly is used in wiper motor.

Claims

1. the brush holder that is used for motor, said brush holder has spring lever, on said spring lever, brush at the canned paragraph upper support, and said brush electrically contacts by means of twisted wire, it is characterized in that the end (26) of twisted wire (10) and spring lever (3) welding.

2. according to the described brush holder of claim 1, it is characterized in that construct agley on spring lever (3) classification shape ground on its end that is opposite to brush (2), and form the contact-segment (7 on plane; 25) or welded gasket, the respective planes of twisted wire (10) the loosening end (26) of extending is welded on said contact-segment or the welded gasket.

3. according to the described brush holder of claim 2, it is characterized in that the contact-segment (7 that extend on the plane of spring lever (3); 25) on horizontal direction Q, has width b than twisted wire (10) _LBigger width b.

4. according to each the described brush holder in the claim 1 to 3, to it is characterized in that, to be electrically connected in order producing, in the contact-segment (7 of spring lever (3) with brush (2); 25) go up the generation contact.

5. according to the described brush of claim 4, it is characterized in that, get rid of and disturb choke (30) to use its end (31) to be close to the contact-segment (7 of spring lever (3); 25) on, and produce with brush (2) and to be electrically connected.

6. according to each the described brush holder in the claim 1 to 5, it is characterized in that brush holder (1) has spring section or supporting section (6), said supporting section comprises circular design and segment section that be used for being installed in brush holder device (23) (9) substantially.

7. comprise motor according to each the described brush holder in the claim 1 to 6.