Patent ID: 8418862

Claim:
A semi-permanent vehicle coupler for light rail comprising a buffer end and a buffer-free end, wherein the buffer end comprises a buffer, a joint bearing connected with the buffer and a mounting seat, wherein the joint bearing is connected with the mounting seat through a coupler yoke key; the buffer-free end comprises a left pull ring, a joint bearing connected with the left pull ring and a mounting seat, wherein the joint bearing is connected with the mounting seat through a coupler yoke key; the buffer is a double-acting buffer and comprises a shell, a left end cover, a right pull ring, elastic bodies, a central shaft and a middle partition plate, wherein the central shaft passes through the centers of the left end cover and the right pull ring and is glidingly contacted with the left end cover and the right pull ring, one end of the central shaft extends out of the left end cover, the middle partition plate is fixedly arranged on the central shaft and divides the inner part of the shell into two elastic body accommodating cavities, and the elastic bodies are positioned in the two elastic body accommodating cavities; and the other end of the left pull ring is provided with a lug boss, one end of the central shaft extending out of the left end cover is also provided with a lug boss, and the two lug bosses are connected through a connecting ring, wherein a convex shim plate is arranged between the elastic body and the left end cover, and a flat shim plate is arranged between the elastic body and the right pull ring, and a conical surface matching mode is adopted between the convex shim plate and the left end cover and between the flat shim plate and the right pull ring, and wherein the semi-permanent vehicle coupler for light rail is provided with stretching overload protection devices which comprise a shaft shoulder arranged on the central shaft and a lug boss positioned on the convex shim plate.