Connecting rod type two-level locking device, hopper car bottom door and hopper car

US10640133B2 · kind B2 · utility

Assignee

• CRRC YANGTZE GROUP CO., LTD. · CN

Inventors

• Chunjiang Shi · 红钢城街道, CN
• Mingdao Sun · 红钢城街道, CN
• Qiangjun Jiang · 红钢城街道, CN
• Fengwei Liu · Chengdu, CN
• Baolei Wang · 红钢城街道, CN
• Wenliang Liu · Beijing, CN
• Chuqiang Tang · 红钢城街道, CN
• Ruijin Jiang · 红钢城街道, CN
• Liangcai Lin · 红钢城街道, CN
• Tiejun Fu · 红钢城街道, CN

Key dates

• Filing date: Nov 17, 2017
• Grant date: May 5, 2020
• Expiry date: May 31, 2038

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D19/00
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The present invention discloses a connecting rod type two-level locking device, a hopper car bottom door and a hopper car, and belongs to the technical field of rail wagons. The connecting rod type two-level locking device includes a transmission shaft, a door opening arm, a first roller, a second roller, a first locating pin, a standstill locking disk and a linkage mechanism. The hopper car bottom door includes the connecting rod type two-level locking device. The hopper car includes the bottom door. Even if the connecting rod type two-level locking device is accidentally stressed, the linkage mechanism cannot rotate, and at this time, the slave arm cannot rotate neither. The accidental opening of the hopper car bottom door can be avoided. The hopper car is more reliable to use.