WO2004077646A1 - ブラシ装置及びブラシ付きモータ - Google Patents
ブラシ装置及びブラシ付きモータ Download PDFInfo
- Publication number
- WO2004077646A1 WO2004077646A1 PCT/JP2004/002197 JP2004002197W WO2004077646A1 WO 2004077646 A1 WO2004077646 A1 WO 2004077646A1 JP 2004002197 W JP2004002197 W JP 2004002197W WO 2004077646 A1 WO2004077646 A1 WO 2004077646A1
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- WO
- WIPO (PCT)
- Prior art keywords
- brush
- support shaft
- spring
- commutator
- brush holder
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/38—Brush holders
- H01R39/40—Brush holders enabling brush movement within holder during current collection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/14—Means for supporting or protecting brushes or brush holders
- H02K5/143—Means for supporting or protecting brushes or brush holders for cooperation with commutators
- H02K5/146—Pivotally supported brushes or brush holders
Definitions
- the present invention relates to a brush structure for a motor with a brush using a carbon brush, and in particular, the brush is formed by a coiled spring.
- the present invention relates to a brush device for biasing a commutator and a brushed motor provided with the brush device.
- FIG. 16 shows a conventional brush device provided with a spring means for urging the brush toward the commutator (for example, see Patent Document 1).
- the brush 19 is formed in a substantially arc shape, and a part of the outer peripheral surface of the brush 19 is supported by being in contact with the inner wall of the holding portion 22.
- the outer peripheral surface of the end of the brush 19 on the commutator 2 side is brought into contact with the inner wall of the holding portion 22 by the frictional force with the commutator 2, and the brush 19 is twisted by the biasing force of the torsion spring 23.
- the inner peripheral edge of the spring 23 side end is brought into contact with the inner wall of the holding portion 22. Therefore, the brush 19 is supported with a gap g provided between the brush 19 and the inner wall of the holding portion 22 to improve the followability of the brush 19 to the commutator 2.
- the brush 19 in an arc shape, it is possible to reduce the size of the entire brush device in the radial direction while securing a brush wear allowance due to sliding.
- the brush device 24 shown in FIG. 16 still has a problem in ensuring reliable electrical continuity between the commutator and the brush.
- the brush 19 is merely supported with a gap g on the inner wall of the holding portion 22, and the commutator 2 is formed by a plurality of commutator pieces 2 a in an actual product. . Therefore, when the brush 19 moves between the commutator pieces 2a, the support of the brush 19 becomes unstable, and vibration is likely to occur.
- the commutator may be driven while rotating in the clockwise / counterclockwise direction.
- the brush device shown in Fig. 16 when the commutator 2 is driven in the reverse direction in the clockwise direction, the brush 19 fluctuates due to the gap g between the two locations, and the support of the brush 19 becomes unstable. Vibration easily occurs.
- a brush device 14 as shown in FIGS. 17 and 18 has been commercialized.
- This brush device 14 forms a commutator 2 by equipping a plurality of commutator pieces 2 a at equal intervals on the outer peripheral surface of the motor shaft 1, and fits a carbon brush 10 on a support shaft 7 on the brush holder 4 side. It is composed by holding together.
- This brush device 14 forms a commutator 2 by equipping a plurality of commutator pieces 2 a at equal intervals on the outer peripheral surface of the motor shaft 1, and fits a carbon brush 10 on a support shaft 7 on the brush holder 4 side. It is composed by holding together.
- the brush arm 10a has a sliding surface that makes electrical conduction by contacting the commutator piece 2a, and is formed in an arc shape, as shown in FIG. And a brush base 10 b having a hole 8 for attaching the brush 10 to the brush holder 4.
- a biasing means such as a coil spring 5 is provided on the support shaft 7 concentrically with the support shaft 7 so that the sliding surface of the brush 10 contacts and slides while biasing the commutator piece 2a.
- the brush device 14 has a biasing means (shown only on one brush 10) such as a coil spring 5, so that the contact force to the commutator 2 due to wear of the brush 10 changes. By preventing this, the stability of the electrical conduction between the commutator 2 and the brush 10 is excellent. Further, a brush arm 10a corresponding to the brush 19 in FIG. 16 is supported by a relatively large brush base 10b, and the brush base 10b is fitted to the support shaft 7, so that the brush device in FIG. In comparison with this, there is an advantage in that the support of the brush is more stable and vibration during motor driving is less likely to occur.
- the brush device 14 has a structure in which the brush 10 is placed on the coil-shaped spring 5 serving as an urging means, the thickness of the brush device 14 increases in the direction of the motor shaft 1 accordingly, and as a result, the brush-equipped motor has Motor shaft If miniaturization in the direction is hindered, there is a problem.
- a guide 15 is provided in a part of the brush base 3b, and a recess 6 is provided in the brush holder 14, and in the recess 6, a coiled portion of the coil spring 5 is provided.
- the other end is locked to the locking surface 3c of the brush base 3b, the other end is locked to the step 4a of the brush holder 4, and the longitudinal direction of the coiled spring 5 is
- the coiled spring 5 is aligned with the surface direction (the direction of arrow C in FIG. 20), and the winding part is along at least a part of the inner peripheral shape of the guide part 15 and the recessed part 6.
- a brush device 11 in which the brushes 3 and 3 are arranged on substantially the same plane.
- the longitudinal direction of the coiled spring 5 is mounted on substantially the same plane as the surface direction of the brush holder 14, so that the brush device is thinner than the conventional brush device. Can be formed. Further, by applying the brush device 11 to a motor with a brush, the length in one direction of the motor shaft can be reduced without deteriorating the characteristics of the motor with a brush. is there.
- the brush device 11 of the above application also has the following disadvantages. Since the brush device 11 mounts the coiled spring 5 in substantially the same direction as the surface direction of the brush holder 14, the brush device 11 has a structure in which the spring 5 is exposed when the brush holder 4 is viewed from a direction perpendicular to the plane of the brush holder 4. Become. Accordingly, the winding portion gradually rises from the inside of the depression 6 as the brush device 11 is driven, and as a result, the force of the spring 5 for urging the brush 3 is reduced, and The desired urging force of the contact surface against the commutator piece 2a gradually becomes unavailable.
- the support shaft 7 ' is fitted and fixed to the recess 6 of the brush holder 4, whereas on the arrow a side, the support shaft 7' is a small ring member 7'a.
- the structure is merely fitted and fixed. Therefore, when the fixing strength of the arrow a side and the fixing strength of the arrow b side are compared, the fixing strength of the arrow a side is remarkably low, and the support shaft 7 ′ has substantially the fixing strength such as cantilever support.
- the brush holder 4 is fixed to the recess 6. Therefore, wobble is likely to occur in the support shaft 7 ′ due to the sliding between the commutator piece 2 a and the brush sliding surface, and the support of the brush 3 cannot be firm because the support shaft 7 ′ vibrates.
- the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to improve the contact between a brush of a brush device and a commutator, thereby assuring more reliable electrical conduction.
- An object of the present invention is to provide a brush device that can achieve the above.
- the invention according to claim 1 of the present invention is based on a carbon brush arm having a sliding surface formed in a substantially arcuate shape and having a conductive surface in contact with a commutator and a support shaft.
- a brush composed of a brush base that is attached so as to rotate, and a brush attached to the brush holder so that the sliding surface comes into contact with the commutator by rotation about the support shaft.
- the end of the support shaft on the flat side of the brush base is formed in a hollow cylindrical shape, and the overhang is formed on the other end. Then, the overhang is fixed to the brush holder 1 with an insert mold, and a guide part is provided in a part of the brush base, and a recess is provided in the brush holder 1, and in the recess, Attach one end of the coiled spring to the brush base And the other end of the coil spring is aligned with the brush holder, and the longitudinal direction of the coil spring is aligned with the surface of the brush holder.
- An object of the present invention is to provide a brush device characterized in that one end of a support shaft is fixed.
- the invention according to claim 2 of the present invention is characterized in that a brush arm made of a carbon fiber and having a sliding surface formed in a substantially circular arc shape and having a sliding surface for contacting a rectifier to conduct electricity is provided.
- the brush consists of a brush base that is attached so that it rotates around the shaft, and the brush holder is held so that the sliding surface contacts the commutator by rotation about the support shaft.
- a spring for urging the brush toward the commutator, the end of the support shaft is formed in a hollow cylindrical shape, and the other end side is stretched.
- An extension is formed, the overhang is fixed to the brush holder with an insert model, and the brush holder is provided with a recess, and the support shaft is inserted into the brush base made of a flat member.
- a guide for accommodating the coiled spring The provided by the Recessed portion, a brush mounted on the brush holder in the inner Sasuruko the support shaft to the inner ⁇ , further, Koi One end of the wound part of the spring is locked to the brush arm, the other end to the brush holder, and the longitudinal direction of the coil panel is aligned with the plane of the brush holder.
- the coiled spring and brush are arranged on substantially the same plane with the winding part following at least part of the shape of the guide part and the depressed part, and the hollow cylindrical end of the support shaft is provided.
- the present invention provides a brush device characterized in that one end of a support shaft is fixed to one end of an insertion tube by pushing and expanding the end.
- the invention according to claim 3 of the present invention provides a brush arm made of carbon having a substantially arcuate shape and having a sliding surface that comes into contact with the rectifier to conduct electrical conduction,
- the brush is attached to the brush holder so that the brush consisting of a brush base attached to rotate around the shaft and the commutator, so that the sliding surface comes into contact with the commutator by rotation about the support shaft.
- a brush device provided with a spring for urging the brush toward the commutator, an end of the support shaft is formed in a hollow cylindrical shape, and a projecting portion is formed on the other end.
- the overhang is fixed to the brush holder by an insert mold, and the spring is a torsion coil spring.
- An inner cylinder for inserting the support shaft is installed integrally.
- the brush is attached to the brush holder by inserting the inner cylinder into the support shaft, and the torsion coil spring is further fitted into the outer peripheral surface of the inner cylinder to form the torsion coil spring.
- the longitudinal direction is perpendicular to the surface direction of the brush holder, and the end of the spring wire extending from one end of the winding part of the torsion coil spring is engaged with the brush holder.
- the end of the spring wire rod extending from the other end is locked with a brush, and the hollow cylindrical end of the support shaft is pushed and expanded, so that one end of the support shaft is connected to one end of the insertion tube.
- the present invention provides a brush device characterized by fixing the side.
- the invention according to claim 4 of the present invention provides a brush arm made of carbon having a substantially arcuate shape and having a sliding surface that comes into contact with the rectifier and performs electrical conduction, Brush attached to rotate around A brush composed of a base and a brush is mounted on a brush holder so that a sliding surface comes into contact with a commutator by rotation about a support shaft, and the brush is urged toward the commutator.
- a brush device provided with a spring
- a guide part is provided in a part of the brush base, and a recess is provided in the brush holder, and one of the winding portions of the coil-shaped spring is provided in the recess.
- the end is locked to the brush base, the other end is locked to the brush holder, the longitudinal direction of the coil spring is aligned with the surface of the brush holder, and the winding part is guided.
- the coiled spring and brush are arranged on substantially the same plane with at least a part of the shape of the recess, and the coiled shape when viewed from a direction perpendicular to the surface direction of the brush holder Cover cover to cover the winding part of the spring
- the invention according to claim 5 of the present invention provides a brush arm made of carbon and a support shaft, which is formed in a substantially circular arc shape and has a sliding surface which comes into contact with the rectifier and conducts electricity electrically.
- a brush composed of a brush base that is attached so that it rotates around the center, and a brush that fits into the brush holder so that the sliding surface contacts the commutator by rotation around the support shaft.
- the brush device which is mounted and has a spring for urging the brush toward the commutator, a recess is provided in the brush holder and the brush is supported by a brush base formed of a plate-like member.
- An insertion tube for inserting the shaft and a guide portion for accommodating the coiled spring are provided integrally, and the brush is brushed by inserting the support shaft into the inner tube in the recess. Attach it to the holder, and then insert one end of the coiled spring In addition to engaging the brush arm with the brush arm, the other end is also engaged with the brush holder, and the longitudinal direction of the coil spring is aligned with the surface direction of the brush holder.
- a coiled spring and a brush are arranged on a substantially same surface along a part of the shape, and a winding portion of the coiled spring when viewed from a direction perpendicular to a surface direction of the brush holder.
- the present invention provides a brush device characterized in that a cover plate is provided so as to cover the brush. Further, the invention according to claim 6 of the present invention provides a brush arm made of carbon having a sliding surface formed in a substantially circular arc shape and having a conductive surface in contact with a rectifier. Attach the brush to the brush holder so that the sliding surface comes into contact with the commutator by rotating the brush around the spindle And a spring for urging the brush toward the commutator, wherein the end of the support shaft on the flat side of the brush base is formed in a hollow cylindrical shape, and the other end is formed.
- An overhang is formed on the side, the overhang is fixed to the brush holder by insert molding, and a guide part is provided at a part of the brush base, and a fall part is attached to the brush holder.
- a guide part is provided at a part of the brush base, and a fall part is attached to the brush holder.
- one end of the coiled spring winding is closed.
- the base is locked to the base, the other end is locked to the brush holder, and the longitudinal direction of the coiled spring is aligned with the surface of the brush holder.
- a coiled spring and brush are arranged on a substantially same plane along a part of the shape, and a step is provided on the support shaft, and the step is received by the step and a part of the brush holder.
- a cover plate is provided so as to cover the winding part of the coil spring when viewed from the direction perpendicular to the surface direction of the brush holder, and the hollow cylindrical end of the support shaft is pushed and expanded.
- This provides a brush device characterized in that one end of the support shaft is fixed on the plane of the cover plate.
- the invention according to claim 7 of the present invention relates to a carbon brush arm portion and a support shaft which are formed in a substantially circular arc shape and have a sliding surface which comes into contact with the rectifier to conduct electric conduction.
- the brush is attached to the brush holder so that it rotates around the brush.
- the brush is attached to the brush holder so that the sliding surface contacts the commutator by rotation around the support shaft.
- a spring for biasing the brush toward the commutator wherein the end of the support shaft is formed in a hollow cylindrical shape, and the overhang is provided at the other end.
- the overhang portion is fixed to the brush holder 1 by an insert model, and the brush holder 1 is provided with a recess, and is formed of a plate-like member.
- the insertion tube for inserting the support shaft into the brush base and the guide portion for accommodating the coiled spring are integrally provided, and the support shaft is inserted into the inner cylinder in the recess. Then, the brush is attached to the brush holder, and one end of the coiled spring is locked to the brush arm, and the other end is locked to the brush holder.
- the longitudinal direction is aligned with the surface direction of the brush holder, and the coil-shaped spring and brush are arranged on substantially the same surface with the winding part following at least a part of the shape of the guide part and the notch.
- a step portion is provided on the support shaft, and covers the winding portion of the coil-shaped spring when viewed from a direction perpendicular to the surface direction of the brush holder while receiving the step portion and a part of the brush holder.
- Cover plate as well as the hollow shaft
- the invention according to claim 8 of the present invention provides a brushed motor including the brush device.
- FIG. 1 is a plan view showing a brush device according to a first embodiment of the present invention.
- FIG. 2 is a plan view showing a portion covered with the cover plate in FIG. 1 by a broken line.
- FIG. 3 is a plan view showing an appearance of a cover plate provided in the brush device.
- FIG. 4 is a partial side sectional view of the brush device of FIG. 2 taken along a dashed line A—A.
- FIG. 5 is a perspective view showing a support shaft.
- FIG. 6A is a schematic plan view showing the end face 7d of FIG.
- FIG. 6 (b) is a side view of the support shaft of FIG.
- Figure 7 (a) shows the end face 7 d when the end face 7 d is expanded by caulking.
- FIG. 7 (b) is a side view of the support shaft when the end face 7d is pushed out by caulking.
- FIG. 8 is a perspective view of a brush used in the brush device of FIGS.
- FIG. 9 is a perspective view of a coil spring.
- FIG. 10 is a plan view showing a brush device according to a second embodiment of the present invention.
- FIG. 11 is a plan view showing a portion covered with the cover plate in FIG. 10 by a broken line.
- FIG. 12 is a perspective view of a brush used in the brush device of FIGS. 10 and 11.
- FIG. 13 is a plan view showing a brush device according to a third embodiment of the present invention.
- FIG. 14 is a partial side cross-sectional view of FIG. 7 taken along a dashed line DD.
- FIG. 15 is a perspective view showing another embodiment of the brush used in the brush device according to the present invention.
- FIG. 16 is a plan view showing a conventional brush structure.
- FIG. 17 is a plan view showing another conventional brush device.
- FIG. 18 is a schematic partial cross-sectional side view of FIG. 17 partially cut along a dashed-dotted line FF.
- FIG. 19 is a plan view showing the content of an application for a brush device by the present applicant.
- FIG. 20 is a schematic partial cross-sectional side view of FIG. 19 partially cut along a dashed line AA.
- FIGS. 1 and 2 are plan views of the brush device 11 according to the first embodiment
- FIG. 3 is a plan view showing the appearance of a cover plate 30 provided in the brush device 11
- FIG. 2 is a partial cross-sectional view of the brush holder 4 of the brush device 11 of FIG. 2 taken along a chain line A--A.
- FIGS. 5 to 7 are views showing a support shaft 7 for fixing the brush 3;
- FIG. 8 is a perspective view of the brush 3, and
- FIG. 9 is a perspective view of a coiled spring 5 used in the brush device 11.
- the brush base 3b of the brush 3 is provided with a hole 8 for inserting the support shaft 7, and a part of the outer shape is formed in an arc shape, so that a coil spring 5 is formed.
- the guide part 15 retains at least a part of the winding part of.
- Reference numeral 1 denotes a motor shaft rotatably mounted on a motor body with a brush (not shown).
- a plurality of commutator pieces 2a are provided at equal intervals on an outer peripheral surface of the motor shaft 1. Thus, the commutator 2 is formed.
- the brush 3 has a brush arm 3 a having a sliding surface in contact with the commutator 2 and the brush base 3 b continuously and integrally formed.
- it is formed in a substantially U-shape. It is sufficient that at least only the brush arm 3a of the brush 3 is made of carbon, but in the present embodiment, an example in which the entire brush 3 is formed with a force pad will be described.
- the brush arm 3a is formed in a gentle, substantially circular arc shape.
- an overhang 7b formed on the other end of the support shaft 7 is inserted into the brush holder 14 by insert molding. Then, the hole 8 of the brush 3 is fitted to the support shaft 7 shown in FIGS.
- the support shaft 7 is formed of a metal material such as brass.
- the fixed support shaft 7 is formed such that an end 7d located on the side of the plane 31b of the brush base 3b has a hollow cylindrical shape. . That is, the support shaft 7 is formed in a substantially columnar shape having an inner diameter portion 7a in the length direction (the direction of arrow D in FIGS. 5 and 6) halfway.
- one end 5a of a coil-shaped spring 5 winding portion shown in FIG. 9 is locked on a locking surface 3c formed on the brush 3 in advance, and a shape forming a recess 6 is formed.
- the other end 5b is engaged with the step 4a provided as the above.
- a part of the winding part is formed with the guide part 15.
- a coil spring 5 is loaded into the recess 6 along at least a part of the inner peripheral shape of the recess 6.
- the coil-shaped spring 5 extends along the inner peripheral shape of the guide portion 15 and the recessed portion 6, so that each of the two brushes 3 moves in the direction of the rectifier 2 around the support shaft 7. Rotation causes the sliding surface at the tip of the brush arm 3a to come into contact with the commutator piece 2a while being urged.
- a cover plate 30 as shown in FIGS. 1 to 4 is further attached to the support shaft 7.
- the force plate 30 is provided with a hole 30 a for fitting to the support shaft 7, and the cover plate 30 is provided on the brush holder 4 by fitting the hole 30 a to the support shaft 7.
- the flat portion of the cover plate 30 near the hole 30a is received by a step 7c (see FIGS. 4 to 6) provided on the outer periphery of the support shaft 7.
- the flat portions of the peripheral portions 30b and 30c of the cover plate 30 are received by a step 4b which is a part of the brush holder 4, as shown in FIGS.
- the stepped portion 7c and the stepped portion 4b are configured to have the same height when viewed from a direction perpendicular to the surface direction of the brush holder 4 (the direction of arrow C in FIG. 4).
- the height of the step 7c and the step 4b is determined by the distance (dimension G in FIG. 4) from the plane 31b to the bottom of the recess 6 when the brush 3 is fitted on the support shaft 7, and the winding of the spring 5 It is preferable that the height is set to be 0.1 to 0.2 mm higher than the height of the turning part (dimension H in Fig. 4). As shown in FIGS.
- the size of the cover plate 30 is set in the brush holder 14 in a direction perpendicular to the surface direction of the brush holder 4 (the direction of arrow C in FIG. 4). It shall be set so as to cover the wound part of the spring 5 when viewed. More preferably, even if the winding part is extended due to wear of the brush arm part 3a, the winding part is set to be covered.
- one end of the support shaft 7 is fixed on the flat surface of the cover plate 30 by pressing and expanding the end 7d by caulking as shown in FIGS. 4 and 7. Is done. Since the cover plate 30 is received by the stepped portion 7c and the stepped portion 4b at the time of fixing by caulking, the cover plate 30 is prevented from being pressed against the brush 3 by excessive pressure. Therefore, the brush 3 can be smoothly rotated by the bias of the spring 5.
- the commutator 2 and the brush 3 slide and the electric conduction is performed by rotating the motor shaft 1 which is a rotor.
- the motor can be driven.
- the sliding surface of the brush 3 is worn away by the friction with the commutator 2, and the brush arm 3a is gradually shortened.
- 3 is constantly biased toward the commutator 2 side, so that the electrical continuity between the commutator 2 and the brush 3 is constantly maintained.
- the other end of the support shaft 7 supporting the brush 3 is fixed to the brush holder 14 by insert molding, and the other end is fixed by pushing and expanding by caulking.
- the fixing means at both ends of the support shaft 7 is a means whose fixing strength does not change even if it receives heat accompanying motor driving, both ends are firmly fixed for a long time when the motor is driven. Therefore, since the brush 3 and the commutator piece 2a are always in contact with each other, it is possible to improve the electrical and mechanical reliability of the brush 3 and the commutator 2 for a long period of motor driving.
- both ends of the support shaft 7 can be firmly fixed, so that the brush 3 can be supported firmly.
- the brush 3 and the commutator piece 2a can always be brought into contact with each other, thereby improving the electrical and mechanical reliability of the motor-driven brush 3 and the rectifier 2 for a long time. You can do this.
- the cover plate 30 is fixed to the support shaft 7 so as to cover the winding portion of the spring 5, the upward movement of the spring 5 can be restricted. Therefore, it is possible to keep the brush contact surface in sliding contact with the commutator piece 2a with a desired urging force.
- the present embodiment can be variously modified based on the technical idea.
- the cover plate 30 may be omitted, and the end portion 7d may be pushed and spread on the flat surface 31b and fixed by caulking.
- the support shaft 7 may be formed of a solid column having no inner diameter portion 30a, and the column may be inserted into the hole 30a to provide the cover plate 30 on the brush device 11.
- the present embodiment is most suitable in that it has both effects of improving the electrical and mechanical reliability and preventing the spring 5 from rising.
- FIGS. 10 and 11 are plan views of a brush device 13 according to the second embodiment
- FIG. 12 is a perspective view of a brush 3 ′ in the brush device 13 of FIGS. 10 and 11. is there.
- the same components as those in the first embodiment will be denoted by the same reference numerals, and duplicate description will be omitted, or It is described simply.
- the brush base 3 ′ b of the brush 3 ′ is made of a metal plate-like member, and a support shaft 7 is provided at a predetermined position with a hole 8 for inserting the shaft. , And insert the insertion tube 9 inside the support shaft 7 so as to extend from the hole 8.
- a brush arm 3′a having a sliding surface that comes into contact with the commutator 2 is provided as a separate member, and a clamper 3′c provided on the brush base 3′b is used to separate the brush arm 3′a from the sliding surface.
- the brush arm 3'a is made of carbon and is formed in a gentle and substantially arcuate shape.
- the hole 8, the inner cylinder 9, and the clamper 3'c provided in the brush base 3'b are integrally formed by pressing a metal plate.
- the support shaft 7 is fixed to the brush holder 4 with an insert mold in the same manner as in the first embodiment, the support shaft 7 is inserted into the hole 8 and inserted into the inner cylinder 9.
- the brush 3 ′ is mounted in the recess 6 so as to be rotatable about the support shaft 7.
- the step 7 c of the support shaft 7 is configured to be higher than the end surface 9 a of the insertion tube 9 (see FIG. 12).
- one end 5a (see FIG. 9) of a coiled spring 5 winding part is locked to the end face on the clamper fastening side of the brush arm part 3'a, and the recess 6 is formed.
- the other end 5b is engaged with the stepped portion 4a provided in the above manner.
- the coiled spring 5 A guide portion 16 in which a part of the winding portion is provided integrally with the brush base portion 3'b, and a coil-shaped spring 5 along at least a part of the inner peripheral shape of the recess portion 6 are provided. Load inside.
- the two brushes 3 ′ are respectively arranged in the two directions of the commutator around the support shaft 7. rotates, the sliding surface of the distal end of the brush arm portion 3'a is brought into contact while being urged to the commutator segments 2a, 0
- the cover plate 30 is attached.
- the size of the cover plate 30 is such that when the cover plate 30 is provided in the brush holder 4 and viewed from a direction perpendicular to the surface direction of the brush holder 4, the spring 5 is wound. It shall be set so as to cover the turning part. More preferred In other words, the setting is made so as to cover the wound portion even if the wound portion is extended due to wear of the brush arm portion 3a. Further, when provided in the recess 6, the flat portion of the cover plate 30 near the hole 30a is received by a step 7c (see FIGS.
- the stepped portion 7c and the stepped portion 4b have the same height when viewed from a direction perpendicular to the surface direction of the brush holder 4 (the direction of arrow C in FIGS. 10 and 11). It is configured so that The height of the stepped portion 7c and the stepped portion 4b is determined by the height of the end surface 9a of the inner tube 9 and the winding portion of the spring 5 when the inner tube 9 is fitted to the support shaft 7 (see FIG. 4). It is preferably set to be higher than the dimension H) by about 0:! ⁇ 0.2 mm.
- the end 7 d is pushed and spread by a force crimp as shown in FIG. 7 so that one end of the support shaft 7 is positioned on the plane of the cover plate 30. Fixed.
- the cover plate 30 is fixed by swaging, the cover plate 30 is received by the step 7c and the step 4b of the force-par holder 4, so that the cover plate 30 is pressed against the brush 3 'by excessive pressure. Is prevented. Therefore, the brush 3 'can be smoothly rotated by the bias of the spring 5.
- the fixing means at both ends of the support shaft 7 are the means for which the fixing strength does not change even when receiving the heat accompanying the motor driving, so that the motor driving can be performed at both ends for a long time. Is firmly fixed, and the brush 3 and the rectifier piece 2a are always in contact. Therefore, it is possible to improve the electrical and mechanical reliability of the motor driven brush 3 and commutator 2 for a long period of time.
- the fixing of one end of the support shaft 7 is performed by caulking, it is possible to secure a sufficient fixing strength, and it is possible to firmly fix both ends of the support shaft 7 and the brush 3 Support can also be strengthened. As a result, the brush 3 and the commutator piece 2a can be brought into contact with each other at all times, so that the electrical and mechanical Reliability can be improved.
- the cover plate 30 is fixed to the support shaft 7 so as to cover the winding portion of the spring 5, the rising of the spring 5 can be restricted. Therefore, it is possible to keep the brush contact surface in sliding contact with the commutator piece 2a with a desired urging force.
- the brush base 3 ′ b is formed of a plate-shaped member to reduce the thickness, and the coil-shaped spring 5 is wound around the brush 3 ′ by utilizing the reduced thickness. In order not to protrude from the thickness, it is possible to load the coil-shaped spring 5 in the longitudinal direction substantially on the same plane as the brush holder 4.
- the brush arm 3'a is made separate from the brush base 3'b, so that only the worn brush arm can be replaced. Therefore, it is necessary to replace the entire brush 3. Therefore, the brush device is also easier to maintain.
- the present embodiment can be variously modified based on the technical concept.
- the cover plate 30 is omitted, the end portion 7d is pushed to the end face 9a of the inner cylinder 9, and is swaged and fixed.
- the support shaft 7 may be constituted by a solid column having no inner diameter portion 30a, and the column may be inserted into the hole 8 to provide the force bar plate 30 on the brush device 11.
- this embodiment is the most suitable in that it has both effects of improving the electrical and mechanical reliability and preventing the spring 5 from rising.
- FIG. 13 is a plan view of a brush device 12 according to the third embodiment.
- FIG. 14 is a partial cross-sectional side view of the brush holder 4 of the brush device 12 of FIG. It is.
- the description of the third embodiment will be made only for points different from the first or second embodiment, and the same components as those of the above embodiment will be the same. Numbers are given and duplicate descriptions are omitted or simplified.
- the brush base 3 ′ b of the brush 3 ′ is formed of a metal plate-like member, and a hole for inserting the support shaft 7 is provided at a predetermined position of the brush base 3 ′ b (not shown). ) And an inner cylinder (not shown) for inserting the support shaft 7 is integrally provided so as to extend from the hole.
- the brush arm 3'a is provided as a separate member and fastened by the clamper 3'c, thereby forming a substantially U-shaped brush 3 'as a whole.
- the brush arm portion 3′a is formed of carbon, and is formed in a gentle and substantially circular arc shape.
- the support shaft 7 is inserted into the hole and the inside thereof is inserted.
- the brush 3 ′ is mounted in the recess 6 so as to be rotatable about the support shaft 7.
- the torsion coil spring 5 ′ is fitted into the outer peripheral surface of the inner cylinder, and the end 5 ′ c of the spring wire rod extending from one end of the winding portion of the torsion coil spring 5 ′ is attached to the brush holder. 4 and the end 5'd of the spring wire extending from the other end is locked to the end face on the clamper fastening side of the brush arm 3'a constituting the brush 3 '.
- each of the two brushes 3 ′ rotates in the direction of the commutator 2 around the support shaft 7, and a sliding surface at the tip end of the brush arm 3 ′ a. Contact the commutator piece 2a while being urged.
- the fixing means at both ends of the support shaft 7 is a means whose fixed strength does not change even if it receives heat accompanying motor driving, so that both ends are fixed firmly even when the motor is driven for a long time.
- the brush 3 'and the commutator piece 2a are always in contact. Thus, it is possible to improve the electrical and mechanical reliability of the motor-driven brush 3 and the commutator 2 for a long time.
- the fixing of one end of the support shaft 7 is caulked, so that sufficient fixing strength is provided.
- both ends of the support shaft 7 can be firmly fixed, and the brush 3 ′ can be firmly supported.
- the brush 3 'and the commutator piece 2a can always be in contact with each other, so that the electrical and mechanical reliability of the motor-driven brush 3' and the commutator 2 for a long time can be improved. Can be improved.
- the brush base 3 ′ b of the brush 3 ′ is formed of a flat member to reduce the thickness. Therefore, even if the longitudinal direction of the torsion coil spring 5 'is perpendicular to the surface direction (arrow C) of the brush holder 4 and the torsion coil spring 5' is mounted, the winding part of the torsion coil spring 5 'is It does not extend beyond the thickness of the arm 3'a. Therefore, a thin brush device can be formed as compared with the conventional brush device.
- the brush arm 3 ′ a is formed as a separate member, so that only the worn brush arm 3 ′ a can be replaced. Therefore, it is not necessary to replace the entire brush 3 ′. The maintainability of the brush device is excellent.
- the present invention is not limited to this.
- the brush of the brush 3 of the first embodiment The arm 3a and the brush base 3b may be separate villages, and only the brush arm 3a may be made of carbon.
- INDUSTRIAL APPLICABILITY As described above, according to the present invention, the support shaft for supporting the brush and the brush hood are fixed with an insert mold, and the other end of the support shaft is caulked. Since the means of pushing and expanding is used to fix, it is possible to prevent a situation in which the fixing strength is reduced due to the action of heat generated by driving the motor, such as when the fitting is fixed.
- the fixing of the both ends of the support shaft can be firmly held, and the brush can be stably supported. Therefore, the brush can be always in contact with the commutator, and the brush for long-term motor drive can be adjusted. It is possible to improve the electrical and mechanical reliability of the gang.
- by fixing the end surface of the support shaft by crimping as described above it is possible to secure a sufficient fixing strength as compared with fixing by the insert mold at the other end. Therefore, since both ends of the spindle can be firmly fixed, the brush can be firmly supported. As a result, the brush and the commutator can always be brought into contact with each other, so that the electrical and mechanical reliability of the motor-driven brush and the commutator can be improved over a long period of time.
- a cover plate is provided so as to cover the wound portion of the spring, so that it is possible to restrict the rising of the spring accompanying the driving of the brush device. I can do it. Therefore, it is possible to keep the brush contact surface in sliding contact with the commutator piece 2a with a desired urging force.
- a step is provided on the spindle, and the cover plate is provided while receiving the step and a part of the brush holder. Since the plate is prevented from being pressed against the brush, the brush can be smoothly rotated by the bias of the spring.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Current Collectors (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE602004032111T DE602004032111D1 (ja) | 2003-02-28 | 2004-02-25 | |
EP04714429A EP1598922B1 (en) | 2003-02-28 | 2004-02-25 | Brush device and motor with brush |
US10/545,966 US7242127B2 (en) | 2003-02-28 | 2004-02-25 | Brush device and motor with brush |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-053695 | 2003-02-28 | ||
JP2003053695A JP4223837B2 (ja) | 2003-02-28 | 2003-02-28 | ブラシ装置及びブラシ付きモータ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004077646A1 true WO2004077646A1 (ja) | 2004-09-10 |
Family
ID=32923439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/002197 WO2004077646A1 (ja) | 2003-02-28 | 2004-02-25 | ブラシ装置及びブラシ付きモータ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7242127B2 (ja) |
EP (1) | EP1598922B1 (ja) |
JP (1) | JP4223837B2 (ja) |
DE (1) | DE602004032111D1 (ja) |
WO (1) | WO2004077646A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7722444B2 (en) | 2005-05-13 | 2010-05-25 | Black & Decker Inc. | Angle grinder |
US10818450B2 (en) | 2017-06-14 | 2020-10-27 | Black & Decker Inc. | Paddle switch |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7432627B2 (en) * | 2004-11-10 | 2008-10-07 | Black & Decker Inc. | Brush assembly including biasing member for applying force |
EP2600503B1 (de) * | 2011-12-02 | 2019-02-13 | Lakeview Innovation Ltd. | Bürstendeckel für einen bürstenkommutierten Elektromotor und Elektromotor |
CN109560653A (zh) * | 2018-12-24 | 2019-04-02 | 贵阳万江航空机电有限公司 | 一种刷盒及其与刷架环的配合结构 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4412964Y1 (ja) * | 1965-08-18 | 1969-05-30 | ||
JPS4860398U (ja) * | 1971-11-09 | 1973-08-01 | ||
JPH07213023A (ja) | 1994-01-20 | 1995-08-11 | Mabuchi Motor Co Ltd | 小型モータ |
DE29605114U1 (de) | 1996-03-19 | 1996-07-11 | Interelectric Ag | Bürstendeckel für Gleichstrommaschinen |
JP2003169450A (ja) * | 2001-11-30 | 2003-06-13 | Namiki Precision Jewel Co Ltd | ブラシ装置及びブラシ付きモータ |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3177388A (en) * | 1960-03-18 | 1965-04-06 | Singer Co | Brush holder assembly for electric motor |
GB1134498A (en) * | 1965-08-06 | 1968-11-27 | Int Research & Dev Co Ltd | Electrical current transfer devices |
DE8227370U1 (de) * | 1982-09-29 | 1983-06-09 | Siemens AG, 1000 Berlin und 8000 München | Hammer-Bürstenhalter für einen Elektro-Kommutatormotor |
JPH0323824Y2 (ja) * | 1985-12-09 | 1991-05-23 | ||
JPH08223848A (ja) * | 1995-02-07 | 1996-08-30 | Sawafuji Electric Co Ltd | 回転電機 |
US5631513A (en) * | 1995-03-20 | 1997-05-20 | Ametek, Inc. | Dynamoelectric brush holder clip and connector |
JP2004139792A (ja) * | 2002-10-16 | 2004-05-13 | Toshiba Corp | 電子銃構体用抵抗器、これを備えた電子銃構体及び陰極線管装置 |
-
2003
- 2003-02-28 JP JP2003053695A patent/JP4223837B2/ja not_active Expired - Fee Related
-
2004
- 2004-02-25 US US10/545,966 patent/US7242127B2/en not_active Expired - Fee Related
- 2004-02-25 DE DE602004032111T patent/DE602004032111D1/de not_active Expired - Lifetime
- 2004-02-25 EP EP04714429A patent/EP1598922B1/en not_active Expired - Lifetime
- 2004-02-25 WO PCT/JP2004/002197 patent/WO2004077646A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4412964Y1 (ja) * | 1965-08-18 | 1969-05-30 | ||
JPS4860398U (ja) * | 1971-11-09 | 1973-08-01 | ||
JPH07213023A (ja) | 1994-01-20 | 1995-08-11 | Mabuchi Motor Co Ltd | 小型モータ |
DE29605114U1 (de) | 1996-03-19 | 1996-07-11 | Interelectric Ag | Bürstendeckel für Gleichstrommaschinen |
JP2003169450A (ja) * | 2001-11-30 | 2003-06-13 | Namiki Precision Jewel Co Ltd | ブラシ装置及びブラシ付きモータ |
Non-Patent Citations (1)
Title |
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See also references of EP1598922A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7722444B2 (en) | 2005-05-13 | 2010-05-25 | Black & Decker Inc. | Angle grinder |
US8087977B2 (en) | 2005-05-13 | 2012-01-03 | Black & Decker Inc. | Angle grinder |
US10818450B2 (en) | 2017-06-14 | 2020-10-27 | Black & Decker Inc. | Paddle switch |
Also Published As
Publication number | Publication date |
---|---|
JP4223837B2 (ja) | 2009-02-12 |
EP1598922A4 (en) | 2008-10-08 |
US20070001537A1 (en) | 2007-01-04 |
JP2004266922A (ja) | 2004-09-24 |
DE602004032111D1 (ja) | 2011-05-19 |
EP1598922B1 (en) | 2011-04-06 |
EP1598922A1 (en) | 2005-11-23 |
US7242127B2 (en) | 2007-07-10 |
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