Two-level locking device, hopper car bottom door and hopper car

US9789883B2 · 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 6, 2014
• Grant date: Oct 17, 2017
• Expiry date: Apr 7, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B61D7/26
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The present invention discloses a two-level locking device, a hopper car bottom door and a hopper car. The device includes a first transmission shaft, a second transmission shaft, a clutch, a pressure mechanism and a reset mechanism, wherein under the pressure action of the pressure mechanism, the clutch separates the first transmission shaft from the second transmission shaft, and under the action of the reset mechanism, the clutch joints the first transmission shaft with the second transmission shaft. The bottom door includes the device. The hopper car includes the bottom door. By adopting the device, when the clutch is accidently separated by the pressure action of the pressure mechanism, the reset mechanism can re-joint the clutch to prevent the accidental rotation of the first transmission shaft and the second transmission shaft. By adopting the bottom door, the hopper car bottom door opened and closed by a planar four-bar linkage passing a dead point is more reliable to use. The hopper car is more reliable to use.