Toyota Jidosha Kabushiki Kaisha

Aisin Seiki Kabushiki Kaisha

Aisin Corporation

Jun Kamitake

Takahito Endo

Keisuke Uchida

Shingo Iwatani

Go Kuramoto

Shuhei Yamaguchi

Hirokazu Tsunekawa

Makoto Taniguchi

Yuki Kurosaki

Shotaro Kato

Yoshito Sekiguchi

Yoshihiko Ukai

Masanori Sakai

Takeshi Matsumoto

Jo Kayahana

Katsuaki Makino

Takeyoshi Horibe

A planetary gear mechanism including a plurality of pinion gears held rotatably and revolvably, and a ring gear meshing with the plurality of pinion gears, wherein the ring gear includes a plurality of low rigidity portions (through holes) having a small section modulus in a radial direction of the ring gear at predetermined intervals in a circumferential direction of the ring gear, and the plurality of teeth of the ring gear include a thermally-treated distortion portion (gear portion) in which an accumulated pitch error based on thermal treatment fluctuates.

Planetary gear mechanism

A double side welding method used for producing a differential gear for welding a weld part to join a ring gear fitted on a gear case from both sides. The method uses welding distortion caused by welding to improve product accuracy. The method includes welding from both sides of a weld part where a first member and a second member, which are the objects being joined, face each other. The method is performed by first welding, which is performed from one side, and second welding, which is performed from the other opposite side from that first welding. Heat quantity adjustment, that adjusts the quantity of heat input to the weld part for the second welding, is performed after the first welding, and is carried out such that an amount of welding distortion that is the objective arises.

Double sided welding method

A welded structure has a first member and a second member that are welded together. The first member comprises a second-member joining part, and the second member comprises a first-member joining part. If the direction in which the first member and the second member are arranged is the first direction, and the direction intersecting the first direction is the second direction, welded parts are provided at least at both ends in the second direction of the joining surface where the first member and the second member are joined. The first member is such that the second-member joining part and a linking part which connects to the second-member joining part are arranged in succession from the joining surface in the first direction, and the dimensions of the second-member joining part are greater than the dimensions of the linking part in a third direction perpendicular to the first direction.

Welded structure and welding method

An annular caulking-fastened component to be fastened to a counterpart component by caulking includes a notch formed in an inner peripheral edge portion at one end side in a center axis direction, the notch being to be fixed to the counterpart component by caulking; and at least one of an inner-peripheral stepped portion formed between an inner peripheral surface and the inner peripheral edge portion and outward from the inner peripheral surface in a radial direction and an end-face stepped portion formed between an end face at one end side in the center axis direction and the inner peripheral edge portion and from the end face toward the other end side in the center axis direction.

Caulking-fastened component, method of fastening the caulking-fastened component, and method of manufacturing the caulking-fastened component

Assuming that a direction in which a first member and a second member are arranged is a first direction and a direction orthogonal to the first direction is a second direction, a welding structure includes: a pressure fit portion; a first cavity; a second cavity; a first weld bead formed between the first cavity and an end of a joining part of the first member and the second member on one side in the second direction by welding the first member and second member while the second cavity is communicated with outside; a second weld bead formed between the second cavity and an end of the joining part on the other side in the second direction; and a cutout groove communicating between the first cavity and the second cavity.

Welding structure and method for manufacturing welding structure

A welded structure and welding method make it possible to improve welding strength and welding quality. A welded structure in which a first member and a second member are joined by welding, wherein the first member comprises a second-member joining part which is joined to the second member, and the second member comprises a first-member joining part which is joined to the first member. If the direction in which the first member and the second member are arranged is the first direction, and the direction intersecting the first direction is the second direction, the welded structure comprises a cavity part which is provided between the first-member joining part and the second-member joining part, and a welded part which is provided between the cavity part and both end parts in the second direction of the joining surface where the first-member joining part and the second-member joining part are joined.

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Toyota, Japan

Jun Kamitake