Abstract: Example brush holder assemblies of an electric machine are disclosed. An example brush holder assembly of an electric machine includes a carbon brush including an upper surface and a lower surface opposite the upper surface. The brush holder assembly also includes one or more lead wires extending out of the carbon brush at an insertion point on the upper surface and a first cavity extending into the carbon brush from the upper surface at a location spaced away from the insertion point of the one or more lead wires and unobstructed by the one or more lead wires.

Abstract: Example brush holder assemblies of an electric machine are disclosed. An example brush holder assembly of an electric machine includes a carbon brush including an upper surface and a lower surface opposite the upper surface. The brush holder assembly also includes one or more lead wires extending out of the carbon brush at an insertion point on the upper surface and a first cavity extending into the carbon brush from the upper surface at a location spaced away from the insertion point of the one or more lead wires and unobstructed by the one or more lead wires.

Abstract: A universal motor includes a commutator brush with a cavity for sheltering a constant force spring from a wire shunt. In some examples, the cavity can be formed by milling a blind hole into the brush such that an axial centerline of the hole is perpendicular to the brush's length. The cavity is near the back end of the brush, at the end farthest away from the commutator, but is also slightly forward to leave a rear portion of the brush to serve as a barrier between the wire shunt and the spring. The diameter of the cavity is slightly larger than the width of the brush, so the cavity creates a slot in the side of the brush. The slot allows part of the spring to reach out beyond the cavity to where the spring can hook onto a front edge of a stationary sleeve that supports the brush.

Abstract: A sliding brush assembly for a slipring includes a sliding brush and an absorbing device containing absorbing material attached to the sliding brush, such that the at least one sliding brush is enclosed by the absorbing material. The absorbing device includes a housing with two (optionally identical) housing parts (each having an elongated base with a snap arm at one side and at the opposing side an opening, into which the snap-arm fits). The housing may easily be closed around a sliding brush by snapping two housing parts together.

Abstract: A brush holder apparatus includes a stationary support member having at least one groove, a fork electrical connector, and a conductive bar configured to pass through a portion of a main body of the stationary support member. The conductive bar provides electrical conductivity with a collector mount and fork electrical connector. A brush holder is releasably affixed to the stationary support member, and has at least one rail that slides along the groove(s). The brush holder has a knife electrical connector that mates with the fork electrical connector. A brush spring is clipped on the brush holder, and presses a brush against a collector of a dynamoelectric machine. The brush spring is replaceable in the brush holder. The brush spring or brush holder has a friction enhancing material attached to an area where the brush spring attaches to the brush holder.

Abstract: A brush holder for an electric motor includes a brush magazine forming a receiving space with a wall surface. A carbon brush having an end face and a side face is arranged in the receiving space. The brush holder also includes a spring, which is in contact with the end face and is configured to press the carbon brush in an extension direction of the receiving space. The brush holder also includes a pressing mechanism arranged on a pivot arm and configured to contact the side face and press the carbon brush by the force of the spring in a pressing direction against the wall surface. The pivot arm has a pivot shaft, to which an inner end of the spring is fastened. The pressing mechanism has a rolling surface configured to roll over the side face of the carbon brush when the carbon brush slides in the extension direction.

Abstract: Various embodiments include a brush holder apparatus. In one embodiment, a brush holder apparatus for receiving a brush includes: a first support member; a box member affixed to the first support member; and a cam member operably connected to the first support member, the cam member configured to retain the brush against an inner surface of the box member.

Abstract: An electric motor has a rotor and a stator. The stator has an endcap with two brush assemblies, two brush brackets for holding the brush assemblies and two electrical terminals. Each brush assembly is detachably mounted to its brush bracket and has a brush holder, a brush slidably received in the brush holder, a spring for urging the brush out of the brush holder, and a conductive member electrically connecting the brush with a corresponding electrical terminal via a resilient releasable connection.

Abstract: A brush holder apparatus is disclosed. In one embodiment, the brush holder apparatus includes: a first support member; a second support member affixed to the first support member; a brush retainment member affixed to the first support member and extending substantially parallel with the second support member; and a cam member operably connected to the second support member, the cam member configured to retain a brush against the brush retainment member.

Abstract: A brush motor includes a commutator fixed to a shaft, a pair of brushes in a sliding contact with a circumferential surface of the commutator, a first and a second torsion springs respectively pushing and pressing the pair of the brushes to sides of the commutator, a supporting plate attached with the springs, and a screw supporting the supporting plate. The supporting plate 10 is configured to be rotatable about the screw as a center or a supporting position by the screw is capable to be changed, in such a way that the pushing pressures by the springs to the pair of the brushes become to be equalized. Thus, insulation between the brushes can be secured while noise reduction and durability are improved.

Abstract: An electric motor has a stator, a rotor and brush gear. The rotor includes a shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft, and rotor windings wound on the rotor core and electrically connected to the commutator. The brush gear includes at least two arcuate brushes for making sliding contact with the commutator. The commutator and brush gear are disposed within a space formed in the rotor core to minimize the axial length of the motor.

Abstract: A brush holder extends substantially in a radial direction of a commutator. The brush holder includes a first inner side surface and a second inner side surface, which are separate from each other in the axial direction of the commutator. A torsion spring presses portions-to-be-pressed of a brush-rear end, thereby urging the brush toward the commutator. The portions-to-be-pressed are deviated from a brush-center line in the axial direction of the commutator. The brush is urged by the torsion spring, thereby bringing a brush-tip end into contact with the first inner side surface, and bringing the brush-rear end into contact with the second inner side surface.

Abstract: Systems, methods, and apparatus associated for lifting brushes and shorting slip rings are provided. One embodiment may include a shaft in operable communication with a WRIM rotor; multiple slip rings positioned radially around the shaft and in electrical communication with rotor windings of the WRIM; multiple brushes adapted for selective contact with a respective one of the plurality of slip rings. In addition, the system may include multiple selectively activating electrical contacts in electrical communication with respective terminals of the rotor windings of the WRIM; and an actuating mechanism in operable communication with the brushes and the electrical contacts. When the actuating mechanism is actuated, the electrical contacts create electrical shorts between the slip rings and the rotor windings of the WRIM and the plurality of brushes are lifted from contacting the plurality of slip rings.

Abstract: An enhanced counter-rotating electric motor and an associate propulsion system for use with a water-vehicle includes a motor housing, a stator within the housing that rotates about a central axis in one direction, an armature within the stator that rotates about the central axis in an opposite direction from the stator, a first axle that is secured to the stator and extends out from the housing, a second axle that is secured to the armature and extends out from the housing, water-tight rotational seals about each of the two axles, a centrifugal-force-balancing electrical connection mechanism that supplies functioning electrical communication between the motor and external electrical circuitry while operating the motor, and a propeller secured to each said axle.

Abstract: A rail brush assembly for an electric motor having a commutator, comprises a brush, a spring, a pair of rails and at least one detent for retaining the brush on the rails. The brush has a groove on each of a pair of opposite sides. The rails are disposed in the grooves for guiding the brush to the commutator with the brush being freely slidable along the rails within a predetermined range of motion. The spring is arranged to urge the brush along the rails towards the commutator of the motor and is attached to an end of the brush remote from the commutator. The detent is formed between the spring and at least one rail to limit the range of movement of the brush along the rails.

Abstract: An apparatus for holding a brush in contact with a moving conductive surface, the apparatus includes: a rotatable member disposed adjacent to the brush; and a spring coupled to the brush and to the member and configured to bias the brush towards the moving conductive surface; wherein the rotatable member in a first position makes contact with the brush to secure the brush from movement and in a second position releases the brush from the contact to allow the spring to hold the brush in contact with the moving conductive surface.

Abstract: A brush holder assembly of an electrical device is disclosed. The brush holder assembly includes a brush holder, a spring clip removable from the brush holder, a spring detachably coupled to the spring clip, and a spring retainer for retaining the spring on the spring clip. The spring clip is slidably disposed in channels of the brush holder. The detachable spring includes an end region extending around the end of the spring clip such that a first portion of the spring is facing a first side of the spring clip and a second portion of the spring is facing a second side of the spring clip. The spring retainer extends around the end of the spring clip over the end region of the spring.

Abstract: A brush holder having brush holding portions and coil holding portions is disclosed. Each brush holding portion holds a brush such that the brush is slidable on a commutator attached to a rotary shaft. Each coil holding portion holds a choke coil electrically connected to one of the coils. The brush holder includes a holder base member and brush holding members that are assembled to the holder base member so as to form the brush holding portions. Each brush holding member includes a coil supporting portion, which forms the coil holding portion between the corresponding brush holding member and the holder base member.

Abstract: A power tool has an electric motor that includes a commutator, with which at least one commutator brush is acted upon with spring force via at least one commutator spring in the direction of a non-rotatable collector of the commutator. At least one auxiliary tool for adjusting the commutator spring is located on a component of the power tool.

Abstract: The present invention relates to a carbon brush assembly of a slip ring, wherein the slip ring further has a conductive ring. The carbon brush assembly includes a base having two tilted rails, and on each of which a carbon brush is movably mounted for reciprocation. Two biasing members are mounted on the base to urge the carbon brushes toward a conductive ring for keeping the carbon brushes in contact with the conductive ring.

Abstract: A manufacturing method for a brush that can reduce contact surface area between a commutator and the brush, thereby reducing frictional noise, is provided. Specifically, a method to manufacture a brush, which provides one surface with contact surfaces that make sliding contact with the commutator, involves a step to mold a molded body and a step to cut the molded body. In the molding process, carbon powder containing copper powder is sintered to form a molded body having a groove on the top surface along the direction of the axis of rotation of the commutator, and curved surface margins in the margins of the top surface in the direction of the axis of rotation. In the cutting step, the central part of the top surface of the molded body is cut by a grinding stone along the cutting direction to form contact surfaces between the margins of the top surface.

Abstract: Slip ring assemblies for controlling pitch of a wind driven blade such as those utilized in wind turbines can include a series of grooves disposed about an outer perimeter of a rotating portion, each one of the grooves comprising a first planar surface intersecting with a second planar surface at an angle of 75 to 105 degrees, and a concavely rounded bottom portion at the intersection of the first and planar surfaces. The rotating portion of the slip ring can be formed of a bronze material and may include a graphite coating. Also disclosed herein are wind turbine assemblies employing the slip ring assemblies.

Abstract: A carbon brush holder includes an insulated housing having a through hole with a first section, a second section and a stepped portion between the first and second sections. A carbon brush-holding member is inserted into the first section of the insulated housing and has a first end face, a second end face opposite to the first end face, and an insertion portion adjoined with the second end face. The insertion portion of the carbon brush-holding member extends into the second section of the insulated housing, thereby enabling the second end face of the carbon brush-holding member to be located in the second section of the insulated housing. Thus, the second end face of the carbon brush-holding member can firmly contact a conductive member that is disposed inside the second section of the insulated housing and electrically connected with a carbon brush inserted into the carbon brush-holding member.

Abstract: A slip-ring brush includes a holder and a brush element that has three regions. The brush element is joined in the first region to the holder, and exhibits a cross-sectional geometry having a cross-sectional area in the second region, which is predetermined for the contacting with a slip ring. The brush element has the same cross-sectional area in the third region as in the second region. The brush element is additionally arranged such that its third region is disposed between the first region and the second region. The cross-sectional geometry of the brush element in the third region is shaped so that it deviates from the cross-sectional geometry of the second region, to reduce the effective spring stiffness of the brush element.

Abstract: An electric motor fixedly axially securable in a housing includes a brush plate with a plurality of axially projecting, uniformly circumferentially distributed, convexly shaped, locking segments formed on the brush plate. The brush plate and the locking segments may be formed of an injection-moldable plastic material. The locking segments may be spherically shaped, and the there may be four locking segments. The brush plate may include a plurality of radial, circumferentially distributed, stop surfaces with which are associated a corresponding plurality of radially inwardly projecting radial guides in the housing.

Abstract: A brush holder device includes a brush including an integrally formed engagement portion; a brush arm having an engagement hole formed therein, the engagement hole assuming substantially the same shape as that of the engagement portion of the brush, and including brush contact portions located at laterally opposite edges of the engagement hole; and a holder. The holder has an engagement hole formed therein, the engagement hole assuming substantially the same shape as that of the engagement portion of the brush, and is fixedly attached to the brush arm such that the engagement hole is aligned with that of the brush arm. The engagement portion of the brush is press-fitted into the engagement holes of the holder and the brush arm, which are fixedly attached to each other, to thereby be fixed in place.

Abstract: In one embodiment of the present invention there is provided a brush holder for use with an electric motor, generator, or actuating device. The brush holder includes a body having an upper portion and a lower portion. A pair of flanges separately extends from opposing sides of the lower portion. Each flange includes a channel to provide a method of adjustably attaching the body to the device. A pair of members separately extends from opposing sides of the upper portion and each member includes a curved surface to accommodate coil ends of a constant force spring. A lateral bore is positioned through the body with openings to the bore being positioned about the pair of members. The bore is sized to accommodate a middle section of a constant force spring. An anterior bore positioned through the body transverses the lateral bore and sized to accommodate a carbon brush.

Abstract: According to the present invention, there is provided a rotating electric machine which includes a field, an armature having an armature shaft and a commutator provided on the armature shaft, a brush to slide on the commutator during rotation of the armature, a brush holder holding the brush, and an end frame covering an end of the armature shaft, wherein the brush holder is directly fixed to the end frame. With such an arrangement, heat generated by the brush and transferred to the brush holder can be directly transferred from the brush holder to the end frame, thereby being effectively dissipated. Moreover, without any additional member intervening between the brush holder and the end frame, the parts count of the rotating electric machine is reduced, thus increasing the assembly accuracy and decreasing the manufacturing cost of the rotating electric machine.

Abstract: An electric machine including armature equipped with armature slots for accommodating armature coils, a commutator equipped with commutator segments, and a first and second hammer brush that each rest against the commutator in sliding fashion by means of a spring lever, in which at least one armature coil is comprised of two partial coils that are situated symmetrically to each other in relation to the rotation axis of the armature and the partial coils are connected to two adjacent commutator segments of the commutator.

Abstract: A brush holder assembly that cannot be assembled incorrectly includes a brush inserted into a brush holder, a block attached to the top of the brush, a spring engaging the block that applies radial pressure to the block and brush, and a hook pin that holds the spring onto the block. The block includes a semicircular indentation that cradles a coiled portion of the spring and includes a slotted hole for receiving a portion of the hook pin as the block is glued to the top of the brush. The hook pin is a loop terminating at a first end that is a straight pin and terminating at a second end that is a hook-shaped loop in which the straight pin end is inserted. Alternatively, a U-shaped spool assembly can be used to engage the coiled portion of the spring to lock it in the indentation in the block.

Abstract: The invention relates to a support element on which the commutator brushes are each disposed on one curved spiral spring each. Said spring, on its side facing away from the commutator brush in the area of the end of the coil is trapezoid and is braced between an outer stop and an inner stop with its longest edge that corresponds to the longest side of the trapezoid.

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 brush box assembly for use in an electric motor and an electric motor having a brush biasing mechanism that also retains the brushes to allow installation of a sliding electrical contact assembly is described. The brush box assembly has a plurality of brush holders each with a brush retention slot, a plurality of brushes each adapted to fit in the brush retention slots, the brushes having a contact face and a non-contact face, and a plurality of torsion springs each having a spring loading arm and a spring retention arm, each spring loading arm contacting one brush on the non-contact face and adapted to bias the brush against a sliding electrical contact after installation of the sliding electrical contact assembly, each spring retention arm adapted to contact one brush on the front side and retain the brush in the brush retention slot during installation of the sliding electrical contact assembly. A method of manufacture of a device having brushes with the biasing and retention mechanism is also disclosed.

Abstract: A brush assembly for an electric motor has a base which secures the brush assembly to a motor spider. A brush housing is associated with the base and has first and second open ends. A brush defining an axis is movably positioned in the housing between the first and second open ends. The brush extends from one of the open ends of the housing. The brush includes a surface which is at a desired angle with respect to the brush axis. A biasing member exerts a force on the brush to bias the brush into an electrical connection with a commutator. An electrical connector electrically couples the brush to provide an electrical connection between the commutator and a power supply.

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: 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: Pseudoelastic elements are shaped in order to form springs which exhibit relatively constant force levels over a major fraction of maximum deflection capacity during loading and also during unloading. The shape of sail pseudoelastic elements is chosen to concentrate at least one of flexural and torsional deformations within limited regions. The element may be braced outside said regions in order to further concentrate deformations within said regions. Loading of said pseudoelastic springs thus produces strains within said regions which are largely corresponding to the upper pseudoelastic stress plateau where strain variations cause relatively small changes in stress. Unloading of said pseudoelastic springs also produces strains within said regions which are largely corresponding to the lower stress plateau of the pseudoelastic stress-strain curve where stress is subject to relatively small changes with strain variations.

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 universal motor has a brush holder assembly which is fixed to a support bracket using a single fastener. The brush holder assembly uses a terminal cap to secure the brush and brush spring within the brush holder. The terminal cap is fixed to the brush holder and compresses the brush spring by movement of the terminal cap in a single direction.

Abstract: An electric motor with a stator having two magnetic shells (2, 3) has a spring element (6) which prestresses the magnetic shells (2, 3) against a stop fixed to the housing. The spring element (6) bears on both magnetic shells (2, 3) with in each case two bearing points. The spring element (6) has a particularly low spring stiffness as a result of this.

Abstract: A motorized reduction gear includes a slip-ring housing having a pivot and a ramp to guide a spring slidably fitted on the pivot as far as its base. The ramp is preferably formed on a boss of the slip-ring housing which extends on each side of the associated pivot and partially surrounds it. In a final position, one branch forces a brush against the slip ring and the other branch bears against a slit at the foot of the ramp to provide an improved assembly that avoids soldering.

Abstract: A brush assembly preferably for a universal motor comprises a tubular brush holder 13, a carbon brush 33, an arm 31 for biasing the brush and a spring 85 for biasing the arm. The brush is slidably mounted in the cavity 21 of the holder. A stop 61 is formed between the brush and the holder and has a disengaged position to permit travel of the brush partially through the inner end 25 of the holder and an engaged position to limit travel of the brush through the inner end 25 of the holder. The electrically conductive arm 31 is pivotally mounted on the support and extends through a slot 29 of the holder. A distal end 60 of the brush engages the outer end 53 of the brush and biases the brush 33 toward the inner end 25 of the cavity. The spring 85 is connected between the support 15 and the arm 31 for biasing the arm 31 into engagement with the brush 33. The arm is spaced outwardly of the end of the slot to apply a bias to the brush when the stop is in an engaged position.

Abstract: A disk drive has a sleeve-bearing spindle motor having a rotor for rotating the disk of removable data storage cartridge. A retainer which is compliant in the direction of axial movement of the rotor stops the axial movement. The retainer is mounted on a moveable platform which mounts the disk cartridge as it is inserted into the drive. The retainer includes a cantilevered beam which is compliant in the direction of axial movement.

Abstract: An electric motor with a sensor, in particular an rpm sensor, is proposed. The sensor contains at least one means (20), generating a magnetic field, as the signal emitter, at least one magnetic field sensor (28, 30) as the signal receiver, and signal conducting means (22, 24, 26). The signal conducting means (22, 24, 26) contain magnetically conducting material and conduct the signal of the at least one magnetic field-generating means (20) to the at least one magnetic field sensor (28, 30). At least one current conducting means (40, 42, 44) is arranged essentially along the signal conducting means (22, 24, 26).

Abstract: The present invention offers a commutation assembly for an electrical motor, whereby a constant optimal pressure is maintained upon the commutator of the motor.

Abstract: A brush holder assembly comprises a non-conductive brush holder body covered by a printed wiring board cover. The brush holder body includes a brush cavity for holding a brush, a spring cavity for holding a spring and a shunt wire cavity for holding a shunt wire. The spring is configured to hold the brush in contact with a commutator at a constant brush pressure throughout the entire length of brush travel. The brush holder body and printed wiring board cover are configured to enclose the brush, spring and shunt wire thus protecting the brush, spring and shunt wire.

Abstract: To inform a user of wear on a carbon brush for a motor earlier than when the carbon brush is actually required to be replaced with a new brush. In a motor brush wear indicating device, a metal terminal is attached to a brush holder, being opposed to the inside of a holder shank of the brush holder, and an indicator is operated when the metal terminal contacts a brush spring. The metal terminal has a contact in the middle of a length of the brush holder. The indicator can be operated while the carbon brush is continuously pressed against a commutator by the brush spring. The metal terminal serves as a leaf spring. When the carbon brush is worn and shortened, the indicator is operated. Even after the indicator operates, the carbon brush is still pressed against the commutator by the brush spring. Therefore, the user can operate a motor-driven tool for some time before the carbon brush must be replaced with a new one.

Abstract: Deformation absorbing grooves 16a are recessedly provided on the inner surfaces of both side walls 15a of a main body 15 of a brush holder made of resin in the sliding direction of a brush 44, and brush holding surface portions 16b holding both end edge portions of the outer surfaces of the brush are formed at edge portions of the grooves 16a on the inner surfaces of the side walls 15a. A pair of first reinforcing ribs 16c are projectingly provided at closing end sides of cutaway portions 18 and 19 on the outer surfaces of the both side walls 15a in the sliding direction of the brush, a pair of second reinforcing ribs 16d are projectingly provided at both top sides of the outer surface of a top side wall 15d for closing an end surface across the tops of the both side walls in the sliding direction of the brush, and an end portion 46a on the reaction side of a torsion spring 46 is engaged with an engageable portion 21A projectingly provided on the first reinforcing rib 16c.

Abstract: A ground detector brush which includes at least one metal leaf spring in addition to a metal conductor to which a brush is attached, where the metal conductor is not pre-bent to provide forces when in an active state to electrically engage a surface. The metal leaf spring serves the function of providing forces to electrically engage the brush against the surface and the metal conductor serves only the function of providing a ground or providing an electrical path to monitor a current level of a system.

Abstract: A monitoring apparatus configured for monitoring a carbon brush of a brush holder assembly of an electrical machine. The monitoring apparatus may include a flexible sensor and a signal processing circuit for processing a signal received from the flexible sensor. The flexible sensor may have an electrical resistance that varies based on a radius of curvature of the flexible sensor, wherein the radius of curvature of the flexible sensor may be associated with a deflection of a spring providing a force to engage the carbon brush with a rotating component of the electrical machine. The signal processing circuit may be coupled to the sensor and may be configured to determine a measure of a wear state of the carbon brush using information about the variable resistance of the flexible sensor.