Transmission
First Claim
1. A transmission comprising a dissimilar metal joined shaft in which at least a first shaft and a second shaft made of dissimilar materials are joined coaxially, the transmission including a stator supported by said second shaft, the second shaft being non-rotatably fixed within the transmission, whereinsaid first shaft has a hollow structure and said second shaft is press fitted into said first shaft,an inner circumferential face of said first shaft and an outer circumferential face of said second shaft have an axial overlap section where said first and second shafts overlap each other in an axial direction,said axial overlap section is joined by friction stir welding,said axial overlap section is a press fitted portion, andsaid axial overlap section is joined by friction stir welding in the press fitted portion.
1 Assignment
0 Petitions
Accused Products
Abstract
A transmission includes a first shaft and a second shaft. The first shaft is made of a first metal material. The first shaft has a hollow structure. The second shaft is made of a second metal material different from the first metal material. The second shaft is fitted into the hollow structure of the first shaft at an axial overlap section. The first shaft and the second shaft are coaxially connected at the axial overlap section with friction stir welding.
5 Citations
19 Claims
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1. A transmission comprising a dissimilar metal joined shaft in which at least a first shaft and a second shaft made of dissimilar materials are joined coaxially, the transmission including a stator supported by said second shaft, the second shaft being non-rotatably fixed within the transmission, wherein
said first shaft has a hollow structure and said second shaft is press fitted into said first shaft, an inner circumferential face of said first shaft and an outer circumferential face of said second shaft have an axial overlap section where said first and second shafts overlap each other in an axial direction, said axial overlap section is joined by friction stir welding, said axial overlap section is a press fitted portion, and said axial overlap section is joined by friction stir welding in the press fitted portion.
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9. A transmission comprising:
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a first shaft made of a first metal material and having a hollow structure; a second shaft made of a second metal material different from the first metal material and fitted into the hollow structure of the first shaft at an axial overlap section, the first shaft and the second shaft being coaxially connected at the axial overlap section with friction stir welding, the second shaft being non-rotatably fixed within the transmission, the axial overlap section being a press fitted portion, the axial overlap section being formed by friction stir welding in the press fitted portion; and a stator supported by the second shaft. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification