CN1139829A

CN1139829A - Mechanical rectification electric motor

Info

Publication number: CN1139829A
Application number: CN96107148.6A
Authority: CN
Inventors: G·哈芬斯坦
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 1995-06-30
Filing date: 1996-06-26
Publication date: 1997-01-08
Anticipated expiration: 2016-06-26
Also published as: GB2302999A; GB2302999B; ITMI961269A0; FR2738087B1; DE19523896B4; IT1284056B1; FR2738087A1; GB9611409D0; DE19523896A1; CH690391A5; CN1068714C; ITMI961269A1

Abstract

A mechanically commutated electric motor, having a brush holder which comprises guide rails (17, 18) for longitudinally guiding engagement into corresponding guide grooves (19, 20) in a brush (11). The arrangement of the brush holder (10) is effected in such a way that a location opening (14) for the brush (11) formed by the guide rails (17, 18) lies substantially in a plane defined by a motor axis (22) and a perpendicular (37) to said motor axis (22).

Description

Mechanical rectification electric motor

The present invention relates to a kind of mechanical rectification electric motor that has a brush clamp, this brush clamp has corresponding pairs ground roughly along the guide rail that becomes direction extends parallel radially with motor axis, corresponding two guide rails form the ccontaining opening of brush betwixt and are designed in order to longitudinally to engage with the respective guide slots of brush, brush is in becomes the position that radially is provided with the rotation of motor.Such brush clamp for example has been disclosed among EP 24 121 B1, the WO84/00445 and EP 482 235 A1.

The common ground of all these brush clamps is, is being approximately perpendicular at the ccontaining opening part that forms between the guide rail on the plane of motor axis stretching, extension.Such configuration mode is seen on the front end face and rear end face that is located at corresponding brush respectively the guide groove of brush along the direction of rotation of commutator, that is guide groove and brush the interface position of downside of commutator side see mutually along direction of rotation and stagger.The fact shows that this brushgear that has guide rail is compared with the brush that is used for stove of routine, has higher wear of brush and is easy to generate spark.For this reason, the brush clamp that has guide rail up to now only adopts in lower-powered motor.

The present invention is intended to overcome above-mentioned shortcoming of the prior art, therefore, the object of the present invention is to provide a kind of motor that has the brush clamp of the band guide rail that reduces wear of brush, the formation of reduction spark, cheapness.

Purpose of the present invention, roughly be located at one by the ccontaining opening that between guide rail, forms and realize, the range of application of the brush clamp brush device of band guide rail is enlarged by in motor axis and the plane that constitutes perpendicular to a vertical line of this motor axis with brush clamp.The invention provides a kind of such brush clamp, it has two tabular thigh portions which is provided with guide rail, and thigh portion interconnects at distolateral bridgeware by the bending that roughly meets at right angles with respect to thigh portion.

The favourable structural development and the improvement of motor of the present invention are described below.At least the bridgeware of this commutator side roughly becomes U-shaped ground to be provided with round the capacity opening that has brush.Be provided with the groove that the edge opens wide in the zone of the extending area of this bridgeware in thigh portion, these grooves can bend the exterior domain of burst portion with respect to the inner region as guide rail.The side towards ccontaining opening at this bridgeware is provided with a grip block, and this grip block curves roughly V-arrangement and is used for the brush stopper.Be formed with a grip block on the bridgeware above another is located at brush, this grip block is used for support spring.Be formed with a flat plug on one of in thigh portion, this flat plug is in order to the pin bushing contact, and this pin bushing is as the electric contact piece of the twisted wire that is electrically connected with brush.Brush clamp is the punching press bending member of being made by sheet material.

The present invention will be described in detail by an embodiment below in conjunction with the accompanying drawings.In the accompanying drawings,

Fig. 1 illustrates the perspective view of the brush clamp of a motor;

Fig. 2 is the end view of brush clamp;

Fig. 3 is the front view of brush clamp;

Fig. 4 is the cutaway view along the IV-IV line intercepting of Fig. 3.

In Fig. 1, brush clamp indicates with label 10, is used to clamp a brush 11.Brush clamp 10 has the thigh portion 12,13 of two strips, and these two bursts of parts separate a distance and are parallel to each other stretching, extension to form the ccontaining opening 14 of a brush 11 betwixt.Thigh portion 12,13 distolaterally interconnects by

bridgeware

15,16 at it.Brush clamp 10 is generally speaking made by board-like material, and its basic configuration for example draws by raw material are carried out punching press, subsequently bridgeware 15,16 is carried out bending.Brush clamp 10 the most handy sheet metals are made, but also can make with plastic material.The part towards ccontaining opening 14 of thigh portion 12,13 is designed for guide rail 17,18 (see figure 4)s that engage with respective guide slots 19,20 in the brush 11.

Guide rail

17,18 and guide groove 19, the 20 common vertical guiding devices that constitute brush 11 allow brush 11 to move axially in ccontaining opening 14.For guaranteeing moving axially of brush 11, the bridgeware 15 of commutator side roughly becomes U-shaped to stretch round ccontaining opening 14 at least.

Brush clamp 10 is provided with facing to the commutator 21 of motor, and brush 11 roughly is in the plane that is made of the motor axis 22 of the rotation that is equivalent to commutator 21 and vertical line 37 perpendicular to motor axis 22.There is a spring 23 to be arranged on the brush 11 in the ccontaining opening 14 and between the bridgeware 16 of commutator 21 brush 11 is pressed against on the periphery of commutator 21 dorsad.Bridgeware 16 equally curves roughly rectangular from thigh portion 12,13 with bridgeware 15.Be formed separately grip block 26,27 in the jumper 24,25 of

bridgeware

15,16, grip block 26 curves V-arrangement roughly and abuts on the end face 11a of brush 11 with the basal edge of its V-arrangement, thereby is designed to brush stopper when packing brush 11 into to help assembling.The grip block 27 that is arranged on the other end of brush clamp 10 is approximately perpendicular to ccontaining opening 14 and stretches outward in order to support spring 23 from jumper 25.In the thigh portion 12, also be to meet at right angles with ccontaining opening 14 additionally on the grip block of bending to be provided with a flat plug 28, in order to pin bushing 29 contacts, this pin bushing 29 is as the electric contact piece of the twisted wire 30 that is electrically connected with brush 11.

In the zone of the extending area of the bridgeware 15 of thigh portion 12,13, the position of thigh portion 12,13 in the middle of roughly has the groove (see figure 3), makes the outer intercept can be towards U-shaped jumper 24 bendings and interior intercept formation guide rail 17,18.Interior guiding zone with outside bend

corresponding groove

35,36 between the zone and in Fig. 3, can know and see.

Importantly,

guide rail

17,18 roughly is located in the plane that is made of motor axis 22 perpendicular lines 37.Thus, brush 11 between the downside of its distolateral 11a and its commutator side, that be roughly parallel to motor axis 22, along the seamed edge the 31, the 32nd of the direction of rotation of commutator 21 biasing, continual.Owing to the guide groove 19,20 that stretches exactly, 11 seamed edge 33,34 places in 11b up and down, side side of brush are interrupted.

Preferably two brush clamps 10 with respect to commutator 21 along the diametric(al) setting of staggering.Described brush clamp 10 can be by a unshowned supporting member, for example supporting lid or housing member interconnect.Under a stable condition, it may be favourable that brush clamp 10 is tilted a little with respect to the plane that is made of motor axis 22 perpendicular lines 37.

Claims

1. mechanical rectification electric motor that has a brush clamp (10), this brush clamp has corresponding pairs ground roughly along the guide rail (17 that becomes direction extends parallel radially with motor axis (22), 18), corresponding two guide rails (17,18) form betwixt the ccontaining opening (14) of brush (11) and be designed in order to longitudinally with the respective guide slots (19 of brush (11), 20) engage, it is characterized in that, at guide rail (17,18) the ccontaining opening (14) that forms between roughly is in the plane that is made of motor axis (22) and a vertical line (37) perpendicular to this motor axis (22).

2. by the described motor of claim 1, it is characterized in that guide rail (17,18) is arranged in the thigh portion (12,13) of brush clamp (10), thigh portion (12,13) interconnects by bridgeware (15,16).

3. by the described motor of claim 2, it is characterized in that bridgeware (15,16) curves roughly rectangular in the end of thigh portion (12,13) with respect to thigh portion.

4. by the described motor of claim 3, it is characterized in that the bridgeware of this commutator side (15) roughly becomes U-shaped ground to be provided with round the ccontaining opening (14) that has brush (11) at least.

5. by claim 2 or 4 described motor, it is characterized in that, be provided with the groove (35,36) that the edge opens wide in the inherent burst portion in zone (12,13) of the extending area of bridgeware (15), these grooves can bend the exterior domain of a burst portion (12,13) with respect to the inner region as guide rail (17,18).

6. by the described motor of claim 5, it is characterized in that, be provided with a grip block (26) in the side towards ccontaining opening (14) of bridgeware (15), this grip block curves roughly V-arrangement and is used for the brush stopper.

7. by a described motor one of in the claim 2 to 5, it is characterized in that, be formed with a grip block (27) on another is located at the bridgeware (16) of brush (11) top, this grip block is used for support spring (23).

8. by a described motor one of in the claim 2 to 5, it is characterized in that, be formed with a flat plug (28) on one of in thigh portion (12,13), this flat plug is in order to contact with pin bushing (29), and this pin bushing is as the electric contact piece of the twisted wire (30) that is electrically connected with brush (11).

9. by a described motor one of in the aforementioned claim, it is characterized in that brush clamp (10) is the punching press bending member of being made by sheet material.

10. brush clamp that is used for the motor of mechanical rectification, this brush clamp has an a pair of separately guide rail apart from extends parallel (17,18), between guide rail (17,18), form a ccontaining opening (14), it is characterized in that, brush clamp (10) has two tabular thigh portions (12,13) which is provided with guide rail (17,18), and thigh portion (12,13) interconnects at distolateral bridgeware (15,16) by the bending that roughly meets at right angles.