Abstract: A brush holder for a vehicle electrical machine having an insulating support, an electrical circuit including a semiconductor control component; and at least one metallic heat dissipation member in contact with the ambient environment and arranged to receive heat from the control component. The dissipation member is composed of two distinct parts, a seat and a dissipator. The seat is fixed to the support and receiving, on one of its faces, the control component and, on the other one of its faces, the dissipator.

Abstract: An object of the invention is to improve a layout property of members arranged on the brush holder. Power feeding terminals are formed in a flat shape extending in an axial direction of an armature shaft, and the power feeding terminal is arranged side by side in a width direction with respect to the power feeding terminal in one end portion of a brush holder. A condenser is provided between the power feeding terminals and the armature shaft. Further, a power supply circuit for electrically connecting the power feeding terminals to a leaf spring brush is electrically connected to a motor housing via a grounding stay, and a choke coil for reducing a noise generated in the power supply circuit is arranged so as to be lapped over a screw member fixing the leaf spring brush to the brush holder in the axial direction of the armature shaft.

Abstract: A surface of a commutator 5 is rubbed by a shakedown brush 21 other than ordinary brushes 11 to produce a carbon coat, whereby a shakedown process can be reduced or abolished.

Abstract: A metal-graphite brush comprises a brush body which is made by mixing and molding metal powder and graphite powder. 2 mg to 30 mg as amounts of phosphate ion of at least one of phosphoric acid and a phosphate compound is added to 1 g of the brush body of the metal-graphite brush.

Abstract: In the present invention, by selecting an optimum combination of plating layer materials or materials, not only the manufacturing cost of motor brush is reduced but also a plating layer having excellent characteristics is formed in a narrow width on the surface of brush base material so as to have a predetermined thickness. The present invention is formed by a brush sliding portion that slides on a motor commutator and a plate-shaped brush base material that is slender as a whole and supports the brush sliding portion. This brush sliding portion is formed by Pd plating portion formed over a predetermined length on a part in the lengthwise direction of the brush base material that supports the brush sliding portion. This Pd plating is applied on the brush base material via backing Ni plating.

Abstract: The present invention aims at making a motor with a brush in the direction of its motor shaft small by providing a thin brush device and at preventing deterioration of functions thereof. A guide portion is provided at a brush base portion and a recess portion is provided at the a brush holder. In the recess, an end portion of a winding portion of a coil-shape spring is held at the brush base portion, and the other end portion is held at the brush holder. Further, the longitudinal direction of the coil-shape spring is set so as to conform to the direction of face of the brush holder, and thereby the coil-shape spring and the brush are disposed on a substantially identical plane, having a state where the winding portion is placed along the guide and recess portion.

Abstract: A driving-side rotator of a clutch has a connecting hole, within which a connecting portion of a rotatable shaft is loosely fitted while providing a space between the connecting hole and the connection portion. The connecting hole of the driving-side rotator is engageable with the connecting portion of the rotatable shaft in a rotational direction to integrally rotate with connecting portion of the rotatable shaft. Two positioning holes are provided in a brush holder, and two positioning projections are provided in a gear housing to allow direct positioning of the brush holder and the gear housing relative to each other.

Abstract: Molybdenum disulfide, tungsten disulfide or the like as a solid lubricant and any of alumina, silica, silicon carbide or the like as an abrasive are added to filter graphite. A metal of good electric conductor is coated over the whole surface of a carbon brush material except a part of the carbon brush material to be contacted with a commutator. When the commutator rotates clockwise, a metal coating of the good electric conductor is removed mechanically from at least a part of at least either of a left side surface or a right side surface.

Abstract: An electrical brush holder and ancillary cable for applying a mechanical force to an electrical brush and for establishing electrical contact between the electrical brush and a current conducting element. The brush holder includes a first wall fastened to the current conducting element, a second wall fastened to the brush, a sidewall lengthwise extendable in an axis direction of the brush and a flexible cable composed of ultra-fine metal fibers configured to conduct current between the current conducting element and the brush. The sidewall cooperates with the first and second walls to form a volume defined by the first wall, the second wall and the sidewall. A fluidic pressurized medium may be contained in the volume for applying a light approximately constant pressure to the brush.

Abstract: An axial direction sliding-contact type brush apparatus is provided which can not only maintain performance of suppressing vibration of a brush of a flat vibrator motor but also allow the brush to form a stable electrical contact with a commutator. The base portion of the brush is installed at the exposed portion of the pattern of the brush base above the bracket at an elevation angle of 45° or less with respect to the brush base. The ultraviolet-cured acryl-based resin is coated on the base portion of the brush to cover a position located at about ? of the side projection length L of the brush arm portion from the base portion of the brush.

Abstract: A multi-brush cage assembly for a subfractional horsepower electric motor has two brushes 22, 23 received in separate chambers 24, 25 of the cage and urged by springs 26, 27 towards a commutator 15 of the motor. An L-shaped changeover lever 30 is located on a pivot 33 between the chambers and keeps one brush 23 retracted until the other brush 22 has worn out.

Abstract: The electric machine includes a collector (60), a brush-holder assembly comprising an end cap (26) and a set of members (28, 30, 32, 34) for electrical connection equipped with guide cages (36, 38, 40, 42) suitable for accommodating a respective brush (44), in which a member (64) for limiting the radial displacement of the brushes in the absence of a collector is provided, the dimensions of the limiting member (64) being suitable for obtaining a tight fit of this member on the end cap (26). Application for the mounting of a brush holder for a motor-vehicle starter.

Abstract: The invention concerns a commutator device (1) for electric motor, comprising a housing part (2) and commutator brushes (3) housed in the housing part, each brush comprising a contact surface (8) designed to be pressed in contact against a commutator of the rotor of the electric motor, and a spring part (9) connected to the contact part (7) so as to exert a force on said contact part towards the rotor commutator. The device further comprises a damping element (14) arranged to absorb the vibrations or movements of the contact part of the brushes. The damping element (14) is a thixotropic lubricant.

Abstract: A flat type vibration motor includes a rotor rotatably assembled between a stator and a housing, wherein the rotor includes an insulator of eccentric mass integrally containing at least a winding coil corresponding to the magnet and a weight arranged eccentrically adjacent to the winding coils, and an upper board mounted on an underside of the insulator; a plurality of brushes; a plurality of annular slip rings arranged on an underside of the upper board to be concentric with the shaft, each of the rings contacting an upper end of each of the brushes; and an IC chip for converting the direction of electric current flowing through the winding coils by alternating the polarity of electric current which is introduced to the slip rings via the brushes and then supplied to the winding coil.

Abstract: A system and method for protecting a motor from a stall condition includes a brush motor 11 having power brushes 14 and 16 that convey power to windings of the motor, and one sensing brush 20 constructed and arranged to sense a speed of rotation of an armature motor. A controller 23 is constructed and arranged to compare a sensed speed of rotation with a minimum speed value that is indicative of a stall condition. A relay 28 is constructed and arranged to disconnect power to the motor if the sensed speed is below the minimum speed value.

Abstract: An brush assembly is provided in which electric power losses in brushes 32 are reduced, thereby suppressing an abnormal or excessive rise in temperature of the brushes. A tip end of a lead wire 33 inserted into a corresponding brush 32 in a direction of pressing upon press molding thereof is embedded in the brush in such a manner that it extends over two thirds or more of the length in the pressing direction of the brush 32.

Abstract: The brush device of a starter with an overheat protection device of the present invention is provided with brush holders, brushes slidably supported in the brush holders, respectively, springs contacting one sides of the brushes to press the brushes in the radial, inner directions, and thermostats disposed on the brushes and adapted to interrupt energization of a starting motor with a power when the brushes exceed a predetermined temperature, caused by the starting motor continuously energized with the power supply.

Abstract: The present invention relates to a wear indicator for a motor carbon brush which includes a housing, carbon brushes, an elastic element, a circuit board with an alarm indicator light and an electric probe disposed on the circuit board. The electric probe is connected to the alarm indicator light and the carbon brush has a contact portion on its outer surface which when the brush is worn and need to be changed is electrically connected to the alarm indicator light through the electrical probe to turn the alarm indicator light on. The present invention is simple to manufacture and gives a indication of wear.

Abstract: Disclosed is a brush assembly of an alternator for a vehicle including a brush holder including a hollow brush holder body, and wired brushes each received in the brush holder, and adapted to be urged against a slip ring fitted around a rotor shaft by a spring along an axis of the slip ring, thereby coming into elastic contact with the slip ring to obtain an electrical connection to an external electrical device, each of the wired brushes consisting of a brush, and a lead wire electrically connected to the brush. The brush holder body of the brush holder has brush channels each adapted to receive the brush of an associated one of the wired brushes, and wire channels each arranged at one side of an associated one of the brush channels while extending longitudinally in parallel to the associated brush channel and communicating with the associated brush channel.

Abstract: A vibration motor having a rotor and a stator is provided. The vibration motor includes a commutator mounted on the rotor and a brush mounted on the stator. The brush is line contact with the commutator of rotor in order to maintain a stable contact between the commutator and the brush and to reduce spark between the commutator and the brush due to the stable line contact between the commutator and the brush.

Abstract: A brush motor for an electric power steering system comprises a four-pole field portion 3, an armature 4 having windings 9 wound around a core 5 with 22 slots 8 to constitute a lap winding, hooks 12 which are formed on one ends of 22 commutator segments 10 respectively and on which the windings 9 are hooked, and a cylindrical commutator 7 constructed by molding integrally the commutator segments 10 with a resin, and four brushes 18 which contact slidably to outer peripheral surfaces of the commutator segments 10, wherein, when the commutator 7 to which a sliding contact portion of the brush 18 contacts is sectioned perpendicularly to an axial direction, a relationship of 0.18≦(A×N)/(D×D)≦0.23 is satisfied, where A is a sectional area of one commutator segment, N is a number of the commutator segments, and D is a diameter of outer peripheral surfaces of the commutator segments.

Abstract: A brush holder assembly for use in an electric actuating device includes a cylindrical sleeve mounted in a housing of the device. The sleeve incorporates a tube that has an end extending inwardly toward a commutator. The tube may also have a length longer than the cylindrical sleeve, such that the end extends beyond the opening. A U-shaped shunt, having a uniform thickness, is slidably positioned within the tube. The U-shaped shunt has flanges extending outwardly from legs that extend towards the commutator. A brush is positioned between the legs of the shunt with a constant force spring being positioned between the brush and the inner surface of the U-shaped shunt. The spring has a pair of coiled ends that are positioned against the flanges. The spring also includes a middle portion that engages one end of the brush to resiliently push the brush against the commutator with a constant applied force. The U-shaped shunt is connected to the brush by a pig tail wire.

Abstract: A brush holder 10 is provided for holding a hammer brush 12 of an electric motor. The brush holder includes a single piece of wire bent to define a brush-engaging portion 14 define an opening 15, and a torsion spring structure 16 connected to and spaced from the brush-engaging portion. The brush-engaging portion is constructed and arranged to prevent rotation of the hammer brush when coupled therewith.

Abstract: An electric motor with brush assembly supporting two separately formed brushes. A fractional horsepower direct current motor has a brush assembly supporting two separately formed brushes and side by side and connected electrically in parallel. This reduces the effective current density required for each brush without increasing the size of the brushes required and affecting the dynamic behavior.

Abstract: Brush holding device includes a brush, a brush holder, a torsion spring and a support pin. The torsion spring applies side pressure to the brush by spring force exerted around the support pin and also temporarily hold the brush in the brush holder. When the temporarily held state of the brush holder is relieved, the spring force of the torsion spring urges the brush toward a commutator.

Abstract: A metal-graphite brush has a copper-graphite brush body to which a metal sulfide solid lubricant is added and a lead embedded. Indium is at least added to an interface between the brush body and the lead in a concentration of 0.4-8 wt %.

Abstract: A DC motor with brushes includes a rotary shaft, an armature rotatable with the rotary shaft, a stator magnet disposed opposite to the armature, a commutator affixed on the side of the armature, and a pair of inside and outside brushes retained by a brush holder in a manner that the brushes are brought in contact with a peripheral surface of the commutator. The pair of brushes has an identical configuration. The outside brush is bent in a direction away from the other brush when the pair of the brushes is retained by the brush holder. The outside brush is further bend when in contact with the commutator. The inside brush has an end section extending toward an intermediate point of the outer brush in a longitudinal direction thereof. Each of the outside brush and the inside brush has a base section that is affixed to a terminal and an end section that is brought in contact with the commutator.

Abstract: A brush assembly has a base with a member to secure the base to a motor end cap assembly. A brush housing is associated with the base. The brush housing includes first and second open ends. A brush, defining an axis, is slidably supported within the housing. The brush extends from one of the first and second open ends. The brush includes a surface with a spring retention plunge. The spring retention plunge defines an arcuate face angled relative to the axis. A biasing member exerts a force directly on the arcuate face to bias the brush into contract with a commutator. An electrical connection is made between the commutator and a power supply.

Abstract: A brush assembly has a base with a member to secure the base to a motor end cap assembly. A brush housing is associated with the base. The brush housing includes first and second open ends. A brush, defining an axis, is slidably supported within the housing. The brush extends from one of the first and second open ends. The brush includes a surface with a spring retention plunge. The spring retention plunge defines an arcuate face angled relative to the axis. A biasing member exerts a force directly on the arcuate face to bias the brush into contract with a commutator. An electrical connection is made between the commutator and a power supply.

Abstract: A choke 10, for suppressing radio-frequency interference of a brush-type motor, includes a single wire having a portion 15 wound about a coil axis A to define a plurality of coils 14 including two outermost coils 16 and 18. An attaching structure 20 extends from each outermost coil and is disposed generally transverse with respect to the coil axis. Each attaching structure is constructed and arranged to be inserted through an associated opening in a supporting structure and to be bent so as secure the choke to the supporting structure. An elongated end portion 22 extends from each attaching structure so as to be spaced from and generally parallel to the coil axis. The elongated end portions extend in opposite directions. One of the elongated end portions is constructed and arranged to be directly electrically connected to an electrical connector of a motor and the other of the elongated end portions is constructed and arranged to be in electrical connection with a brush of the motor.

Abstract: A brush replacement kit for use with a dynamo electric machine of the kind having a yoke, apertures in the yoke through which brushes of the machine are accessible, and a brush holder assembly for supporting the brushes in a predetermined alignment in relation to a commutator or slip-ring assembly of the machine, the kit comprising replacement brushes of a length exceeding the length of the conventional brushes for the machine, and a cover component comprising a cylindrical band for attachment around the exterior of the yoke to close said brush access apertures in use, said band including radially outwardly extending protrusions to be positioned over said apertures of the yoke in use and thereby to accommodate the additional length of the replacement brushes.

Abstract: A motor with brush includes a rotor having a rotary shaft and a commutator retained at the rotary shaft, two brush sections each having a plane surface in an axial direction of the rotor and in sliding contact with the commutator, and two brush terminals that are integral with the brush sections, respectively. Each of the brush terminals includes a brush connecting section formed in the axial direction of the rotary shaft and having a plane surface that connects to the plane surface of each of the corresponding brush sections, and a bent section that is bent in a direction generally orthogonal to the axial direction of the rotary shaft. The bent section restricts and fixedly positions the brush terminal and the brush section, and the brush terminals connect to external connection members that are provided outside the motor and inside an outer circumference of the motor.

Abstract: A choke 10, for suppressing radio-frequency interference of a brush-type motor, includes a single wire having a portion 15 wound about a coil axis A to define a plurality of coils 14 including two outermost coils 16 and 18. An attaching structure 20 extends from each outermost coil and is disposed generally transverse with respect to the coil axis. Each attaching structure is constructed and arranged to be inserted through an associated opening in a supporting structure and to be bent so as secure the choke to the supporting structure. An elongated end portion 22 extends from each attaching structure so as to be spaced from and generally parallel to the coil axis. The elongated end portions extend in opposite directions. One of the elongated end portions is constructed and arranged to be directly electrically connected to an electrical connector of a motor and the other of the elongated end portions is constructed and arranged to be in electrical connection with a brush of the motor.

Abstract: A copper-zinc alloy powder of which zinc content is from 10 to 50 wt % and of which mean particle diameter is from 15 &mgr;m or under is added to a Pb-less brush body comprising graphite, copper and a metal sulfide solid lubricant of a copper-graphite brush.

Abstract: The invention concerns a brush system for a commutated DC motor. As the brush wears, different cross-sectional shapes, at different positions, come into contact with the commutator. The center of contact for each cross-sectional shape can be different, thereby changing brush angle as wear occurs. The change in brush angle can be desirable, in order to offset other effects which occur as a result of wear. For example, motor speed can change as a result of brush wear. Changing brush angle can offset the change in speed.

Abstract: A wet-running direct-current motor for a fuel pump having a commutator (2) formed from carbon lamellas (5), and carbon brushes (3) having brush running faces (6) which are fluted in the direction of rotation. The fluting is obtained by curved, parallel ribs of triangular cross-sections whose apexes define the brush running face. The curved ribs have radii offset from the curvature of the commutator surface, the offset being achieved by offset of the center of the radius of each rib in a direction counter to the direction of relative rotation of the commutator and brushes. The motor is rendered usable for fuel pumps of diesel engines.

Abstract: The invention concerns a device for filtering and interference suppression (62) in an electric motor (34) comprising at least a first powering brush (16) for an armature commutator of the electric motor (34), comprising a capacitor (64) whereof one terminal is electrically connected to a strip conductor (38) electrically powering a first brush (16) powering the armature commutator of the electric motor (34), and the other terminal is electrically connected to a ground-strip conductor (58) connected to the electric ground of the motor (60). The invention is characterised in that the capacitor (72) of the filtering and interference suppression device (62) is non-inductive.

Abstract: A vibration motor having a rotor and a stator is provided. The vibration motor includes a commutator mounted on the rotor and a brush mounted on the stator. The brush is line contact with the commutator of rotor in order to maintain a stable contact between the commutator and the brush and to reduce spark between the commutator and the brush due to the stable line contact between the commutator and the brush.

Abstract: A power tool has a motor housing that comprises housing halves arranged in the circumferential direction of a motor. A brush holder is disposed within the motor housing and serves to support brushes. The brush holder comprises holder halves that are arranged in the circumferential direction of the motor. In order to assemble the brush holder into the housing, one of the holder halves is set onto one of the housing halves. Thereafter, the rotor and the stator are set onto the one of the housing halves. Then, the other holder half is set onto the one of the holder halves and is joined thereto so as to form the brush holder. Finally, the other housing half is set onto the one of the housing halves and are joined thereto so as to form the motor housing.

Abstract: A direct current motor, an apparatus including the direct current motor, and method of assembling the direct current motor with the motor including a stator; a rotor with a rotation shaft and rotor coils, a commutator integrally provided with the stator and connected to the rotor coils, a pair of electrode brushes in sliding contact with the commutator and configured to supply electric power from the commutator to the rotor coils to change a state of a direct current drive voltage to the rotor coils, and at least one rotation detecting brush arranged in a direction along an axis of the rotation shaft and in sliding contact with the commutator at a position different from a contact position of at least one of the pair of electrode brushes such that the rotation detecting brush detects a signal on the commutator indicative of an operation of the direct current motor.

Abstract: A commutator portion or a brush of a motor is formed of electrically conductive resin. When making the commutator portion with electrically conductive resin, a commutator member is molded of non-electrically conductive resin and the commutator members are all integrally formed with the commutator support member. At this time, at least a portion of the outer periphery of the axle is formed simultaneously with an electrically conductive resin layer.

Abstract: A brush assembly (10) for a miniature electric motor has a beryllium copper strip brush arm (14) and a graphite material brush head (12) moulded to an end thereof The brush arm (14) has a number of apertures. The brush head (12) has a number of projections which pass through the apertures and form one or more caps (24) on the reverse side of the brush arm to secure the brush head (12) to the brush arm (14). A method of forming the brush assembly is also provided.

Abstract: In an electric throttle-control apparatus for controlling an open position of a throttle valve 6 connected to reduction gears 47 to reduce rotational speed of the motor 4, by driving a motor 4 which includes a commutator 32 with a plurality of slots 44, and brushes 31 and 31′, the number of the slots in the commutator and the arrangement of brushes on the slots are set such that even and odd number slot states appear alternately in an electrical equivalent-circuit of a wire-connection among slots including the brushes while the motor rotates. Further, if the number of the slots 44 is the odd number 9, 11, or 13, the brushes 31 and 31′ are arranged in a 180° opposed placement, and if the number of the slots 44 is the even number 10 or 12, the brushes 31 and 31′ are arranged in a non-opposed placement shifted from a 180° opposed placement.

Abstract: A brush assembly for a small motor has brushes that are not separated from a commutator when the brushes contact the commutator. The brushes are arranged so that the angles formed by the brushes where the brushes contact the commutator are maintained uniform during assembly of the motor. The pair of brushes include bases connected to each other through a lead frame. The pair of brushes are embedded in a support by molding the support with middle portions of the brushes sandwiched by part of the support so that the angles formed by the pair of brushes where the brushes slidably contact the commutator are uniform.

Abstract: An electric miniature motor having a stator of magnetic soft material and a permanent magnet rotor. The stator has a low electrical conductivity at least in the direction of the rotor shaft to dampen eddy currents in the stator material caused by rotation of the rotor. The magnetizable material of the stator is composed of ring-shaped elements with two sections having their respective diameters so that the elements may be joined co-axially to a tubular stator. This provides the same eddy current damping properties as with a stator composed of segments, but the stator is much cheaper. The coils are formed as flat coils on a flexible foil which are arranged along the internal side of the stator.

Abstract: Proposed is a commutation device for a direct-current motor, designed to improve the ripples in the signal course (40, 50) for the commutation current, so as to obtain reliably and error-free speed information with the aid of an electronic circuit. With the commutation device design according to the invention, the longitudinal edges of the collector bars (11, 21, 31) form an angle (&agr;) of more than zero degrees with the front longitudinal edge (18, 28, 38) of the contact face (16, 26, 36). On the one hand, this results in a reduction of the brush noise (airborne sound) and, on the other hand, in a lowering of the noise development (structure-born sound).

Abstract: Carbon brush including at least one pressed-in stranded copper wire arranged as a plait-woven hollow stranded wire, formed from a plurality of copper strands of diameter 0.05 to 0.1 mm, and recrystallized by heat treatment. The hollow stranded wire contains at least one stiffening inner wire having a diameter of 0.1 to 0.5 mm, the diameter of the at least one stiffening inner wire being at least twice the diameter of any of the copper strands.

Abstract: The invention relates to carbon brushes for electrical machines with commutator in a vehicle with a 36 volt electrical system. According to the invention, the specific electrical resistance of a carbon brush that can be used in a starter motor is greater than 1,000 &mgr;&OHgr;cm, the specific electrical resistance of a carbon brush that can be used in an auxiliary electric motor or an alternator is greater than 10,000 &mgr;&OHgr;cm, and the specific electrical resistance of a carbon brush that can be used in a fuel pump motor is greater than 20,000 &mgr;&OHgr;cm.

Abstract: A wet-running direct-current motor for a fuel pump having a commutator (2) formed from carbon lamellas (5), and carbon brushes (3) having brush running faces (6) which are fluted in the direction of rotation. The fluting is obtained by curved, parallel ribs of triangular cross-sections whose apexes define the brush running face. The curved ribs have radii offset from the curvature of the commutator surface, the offset being achieved by offset of the center of the radius of each rib in a direction counter to the direction of relative rotation of the commutator and brushes. The motor is rendered usable for fuel pumps of diesel engines.

Abstract: The invention concerns a brush system for a commutated DC motor. As the brush wears, different cross-sectional shapes, at different positions, come into contact with the commutator. The center of contact for each cross-sectional shape can be different, thereby changing brush angle as wear occurs. The change in brush angle can be desirable, in order to offset other effects which occur as a result of wear. For example, motor speed can change as a result of brush wear. Changing brush angle can offset the change in speed.