Commutator, and electrical motor and fluid pump using the same
A commutator and motor technology, applied in the field of commutators, can solve the problems of longer production time, difficulty in changing shape, and difficulty in dissolving, etc., and achieve the effects of reducing production cost, easy re-use, and shortening production time
Inactive Publication Date: 2005-07-20
DENSO CORP
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0003] However, when a thermosetting resin is used as the resin material of this commutator, since the resin is hardened by raising the temperature during melting, the production time becomes long
Moreover, once the thermosetting resin is hardened, it is difficult to change its hardened shape, and it is also difficult to dissolve in a solvent.
Therefore, excess resin material generated and cut off during melting cannot be reused
Therefore, the production cost of the commutator is increased
Method used
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Embodiment Construction
[0017] will now refer to Figures 1 to 4 A preferred embodiment of the present invention will be described. figure 1 A fuel pump 1 is shown having an electric motor 4 using a commutator 70 according to the invention. For example, the fuel pump 1 is a suction pump installed in a fuel tank of a vehicle to supply fuel to a fuel consumption system such as an engine in the fuel tank. The fuel pump 1 includes a pump section 2 for increasing the pressure of sucking fuel and a motor 4 that drives the pump section 2 by rotating a rotor 40 around a shaft 42 . The pump section 2 includes a suction side cover 14 , an impeller case 15 and a circular impeller 16 . The electric motor 4 is configured as a DC motor and is provided with permanent magnets 30 and a rotor 40 .
[0018] The casing 12 of the fuel pump 1 secures the suction side cover 14 and a discharge side cover 20 which are provided at both end sides of the shaft 42 of the rotor 40 . The suction side cover 14 and the impeller ...
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A commutator includes plural segments arranged in a rotational direction, and segment terminals electrically connected to respective segments. The segment terminals include middle terminals and end terminal portions, and the segments are electrically connected to the end terminal portions through middle terminal portions. The segments, the middle terminals and the end terminal portions are supported by a resin material made of a thermoplastic resin. By electrically connecting the end terminal portions of the commutator and coil terminals of an armature, the segments of the commutator and coils of the armature can be electrically connected. An electrical motor can be provided with the commutator and the armature. Further, this structure of the electrical motor can be suitably used for a fluid pump such as a fuel pump.
Description
technical field [0001] The present invention relates to a commutator having a commutator section electrically connected to a coil of an armature by contacting its terminals, and to an electric motor and a fluid pump, such as a fuel pump, using the commutator. Background technique [0002] In the conventional commutator described in Japanese Patent JP-A-7-161428, a plurality of commutator segments arranged along the rotation direction and commutator segment terminals electrically connected to each commutator segment are supported by a resin material. Also, each coil of the armature is bonded to each commutator segment terminal so that each commutator segment of the commutator and each coil of the armature are electrically connected together by melting. A thermosetting resin is used as the resin material of the commutator in order to prevent the resin material of the commutator from being softened by heat generated during melting when the commutator segment terminals and the c...
Claims
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IPC IPC(8): F02M37/10F04D5/00H01R39/04H01R39/06H01R39/32H01R43/06H01R43/08H02K5/10H02K5/12H02K13/00H02K13/04H02K23/00
CPCH01R39/32H02K13/006H02K5/12H01R43/08
Inventor 伊藤元也山下庆一
Owner DENSO CORP