| 摘要 |
An improved draft gear for transmitting draft forces in railway vehicles. The invention includes a housing with a closed end and an open opposite end provided with a tapered internal friction surface. A wedge is mounted for axial movement in the open end of the housing and friction shoes are positioned within the housing between the wedge and adjacent portions of the internal friction surface. A follower member is positioned adjacent the friction shoes and springs are positioned between the closed end of the housing and the follower member to urge the follower member against the shoes. Each of the shoes has a beveled outer surface in engagement with a beveled inner surface of the wedge, the beveled inner and outer surfaces being formed at a first selected angle with respect to the axis of the housing. Each of the shoes also has a beveled inner face in engagement with a beveled outer face of the follower member, the beveled inner and outer faces being formed at a second selected angle with respect to the axis of the housing. The angle of the bevel on the outer faces of the follower thereby assists in the assembly of the draft gear. The surface area of each of the inner faces is at least equal to the surface area of the engaged outer face of the follower member such that during application of force to the draft gear, the inner face traverses the entire surface of the outer face to prevent accumulation of metal at the interface of the inner and outer faces. |
