End case mounted brush holder assembly
First Claim
1. An electric machine comprising:
- a casing,an armature shaft assembly journaled for rotation on the casing about an axis of rotation and comprising an armature and a commutator disposed internally of the casing, the casing comprising a transverse wall that is disposed proximate the commutator, and at least one brush holder assembly disposed on the casing transverse wall, the brush holder assembly comprising;
a brush,a brush guide that supports and guides the brush for travel relative to the commutator in a direction that has a radial component relative to the axis of rotation, the brush guide including a generally flat plate member defining a side wall, andan electric insulator mounting that mounts the brush guide with respect to the transverse wall, the electric insulator mounting comprising at least one electric insulator element having a length extending in a direction generally parallel to the brush guide side wall and comprising a groove engaging an edge of the brush guide side wall at a location spaced from the transverse wall to support the brush guide and the brush in spaced relation with respect to the transverse wall, wherein said side wall being in generally parallel relation with respect to said transverse wall.
1 Assignment
0 Petitions
Accused Products
Abstract
A brush holder assembly for mounting on an electric machine casing. The brush holder assembly includes a brush, a brush guide that supports and guides the brush for travel, a spring for biasing the brush in a direction toward a commutator, and an electric insulator mounting for mounting the brush guide on a casing. The electric insulator mounting has electric insulator elements containing grooves engaging the side edges of the brush guide to support the brush guide and the brush in spaced relation to a casing when the brush holder assembly is mounted thereon. The brush guide has at least one wiring tab. Several forms for attaching the insulator elements to the casing are disclosed including threaded fasteners; integral grommet formations of the insulator elements; and the insulator elements being integral formations of the casing.
46 Citations
43 Claims
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1. An electric machine comprising:
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a casing, an armature shaft assembly journaled for rotation on the casing about an axis of rotation and comprising an armature and a commutator disposed internally of the casing, the casing comprising a transverse wall that is disposed proximate the commutator, and at least one brush holder assembly disposed on the casing transverse wall, the brush holder assembly comprising; a brush, a brush guide that supports and guides the brush for travel relative to the commutator in a direction that has a radial component relative to the axis of rotation, the brush guide including a generally flat plate member defining a side wall, and an electric insulator mounting that mounts the brush guide with respect to the transverse wall, the electric insulator mounting comprising at least one electric insulator element having a length extending in a direction generally parallel to the brush guide side wall and comprising a groove engaging an edge of the brush guide side wall at a location spaced from the transverse wall to support the brush guide and the brush in spaced relation with respect to the transverse wall, wherein said side wall being in generally parallel relation with respect to said transverse wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An electric machine comprising:
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a casing, an armature shaft assembly journaled for rotation on the casing about an axis of rotation and comprising an armature and a commutator disposed internally of the casing, the casing comprising a transverse wall that is disposed proximate to the commutator, and at least one brush holder assembly disposed on the casing transverse wall, the brush holder assembly comprising; brush, a brush guide that supports and guides the brush for travel relative to the commutator in a direction that has a radial component relative to the axis of rotation, said brush guide including a generally flat plate member defining side walls, and an electric insulator mounting that mounts the brush guide with respect to the transverse wall, the electric insulator mounting comprising plural, spaced apart, electric insulator elements each having a length extending in a direction generally parallel to the side walls, each electric insulator element having a groove engaging a respective edge of a brush guide side wall at a location spaced from the transverse wall to support the brush guide and the brush in spaced relation with respect to the transverse wall, wherein said side wall being in generally parallel relation with respect to said transverse wall.
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27. A brush holder assembly for mounting on an electric machine casing, the brush holder assembly comprising:
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a brush, a brush guide that supports and guides the brush for travel, said brush guide including a generally flat plate member defining a side wall, and an electric insulator mounting for mounting the brush guide on a casing, the electric insulator mounting comprising; at least one electric insulator element having a length extending in a direction generally parallel to the side wall and comprising a groove engaging an edge of the side wall of the brush guide to support the brush guide and the brush in spaced relation with respect to a casing when the brush holder assembly is mounted thereon, wherein said side wall being in generally parallel relation with respect to a transverse wall of said casing. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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34. A brush holder assembly for mounting on an electric machine casing, the brush holder assembly comprising:
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a brush, a brush guide holder that supports and guides the brush for travel, the brush guide including a generally flat plate member defining a side wall, and plural electric insulator elements which are spaced apart and each of which has a length extending in a direction generally parallel to the side wall of the brush guide, each electric insulator element having a groove which engages a respective edge of the side wall of the brush guide to support the brush guide and the brush in spaced relation with respect to a casing when the brush holder assembly is mounted thereon, wherein said side wall being in generally parallel relation with respect to a transverse wall of said casing. - View Dependent Claims (35, 36, 37)
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38. An electric machine end casing assembly comprising:
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an end casing, a brush holder assembly on the machine casing, the brush holder assembly comprising; a brush, a brush guide that supports and guides the brush for travel, the brush guide including a generally flat plate member defining a side wall, and an electric insulator mounting for mounting the brush guide on the end casing, the electric insulator mounting having a length extending in a direction generally parallel to the side wall of the brush guide, the electric insulator mounting comprising at least one electric insulator element comprising a groove engaging an edge of the side wall of the brush guide to support the brush guide and the brush in spaced relation with respect to the end casing, wherein said side wall being in generally parallel relation with respect to a transverse wall of the end casing. - View Dependent Claims (39, 40, 41)
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42. An electric machine comprising:
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a casing, an armature shaft assembly journaled for rotation on the casing about an axis of rotation and comprising an armature and a commutator disposed internally of the casing, the casing comprising a transverse wall that is disposed proximate the commutator, and at least one brush holder assembly disposed on the casing transverse wall, the brush holder assembly comprising; a brush, a brush guide that supports and guides the brush for travel relative to the commutator in a direction that has a radial component relative to the axis of rotation, and an electric insulator mounting that mounts the brush guide with respect to the transverse wall, the electric insulator mounting comprising at least one electric insulator element comprising a groove engaging the brush guide at a location spaced from the transverse wall to support the brush guide and the brush in spaced relation with respect to the transverse wall, and wherein the brush guide comprises marginal edge portions that define a slot providing the guide path for the brush, and the brush comprises grooves that fit onto the marginal edge portions.
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43. A brush holder assembly for mounting on an electric machine casing, the brush holder assembly comprising:
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a brush, a brush guide that supports and guides the brush for travel, and an electric insulator mounting for mounting the brush guide on a casing, the electric insulator mounting comprising; at least one electric insulator element comprising a groove engaging the brush guide to support the brush guide and the brush in spaced relation to a casing when the brush holder assembly is mounted thereon, wherein the brush guide comprises a guide path for the brush disposed circumferentially between two electric insulator elements, and wherein said brush guide comprises marginal edge portions that define a slot providing the guide path for the brush, and the brush comprises grooves that fit onto these marginal edge portions.
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Specification