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Generators or Motors

Motor-casing-and-method-of-producing-same

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Details

Inventors: Yamakoshi, Issei; Koike, Yoshikazu; Takagi, Kunihiko;
Assignee: Seiko Epson Corporation (Tokyo, JP)
Primary Examiner: Dougherty; Thomas M.
Assistant Examiner: Le; Dang Dinh
Attorney, Agent or Firm: Kanesaka & Takeuchi

A motor casing comprises a first casing member (2) and a second casing member (3) which are separated in a direction of the rotational shaft of a motor, the first and second casing members are coupled by coupling members (4), a stator (6) of the motor is held and fixed within the casing by the first casing member and the second casing member, and the coupling portions between the first casing member and the second casing member are positioned inside and also deep into the first casing member. A method for producing a motor casing is such that when it is assumed that a length of the stator (6) held is L1 and a length from an engaging portion of the coupling member (4) with the first casing member to an engaging portion of the coupling member (4) with the second casing member is L2, a strength classification of the required coupling member is determined in advance by converting it into a ratio of L1 and L2.

DETAILED DESCRIPTION The invention relates to a motor casing comprising a first casing member and a second casing member which are separated in a direction of a rotational shaft of a motor wherein the first and second casing members are coupled by coupling members, a stator of the motor is held and fixed within the casing by the first casing member and the second casing member, characterized by that the coupling portions between the first casing member and the second casing member are positioned inside and also deep into the first casing member.
And, the invention also relates to a method for producing a motor casing having a first casing member and a second casing member which are separated in a direction of a rotational shaft of a motor, the first and second casing members being coupled by coupling members, and a stator of the motor being held by the first casing member and the second casing member to be fixed within the casing, the method is characterized in that when it is assumed that a length of the stator held is L1 and a length from an engaging portion of the coupling member with the first casing member to an engaging portion of the coupling member with the second casing member is L2, a strength classification of the required coupling member is determined in advance by converting it into a ratio of L1 and L2 .

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