CONNECTING ROD TYPE TWO-LEVEL LOCKING DEVICE, HOPPER CAR BOTTOM DOOR AND HOPPER CAR

• US 20180072333A1
• Filed: 11/17/2017
• Published: 03/15/2018
• Est. Priority Date: 11/15/2013
• Status: Active Grant

• Current Assignee: CRRC Yangtze Corporation Limited
• Original Assignee: CSR Yangtze Co., Ltd.
• Inventors: SHI, Chunjiang, SUN, Mingdao, JIANG, Qiangjun, LIU, Fengwei, WANG, Baolei, LIU, Wenliang, TANG, Chuqiang, JIANG, Ruijin, LIN, Liangcai, FU, Tiejun
• Granted Patent: US 10,640,133 B2
• Time in Patent Office: Days
• CPC Class Codes: B61D 7/02 with discharge openings in the bottoms with body in two halves and discharge by tipping the halves B61D9/00
• CPC Class Codes: B61D 7/16 Closure elements for discharge openings
• CPC Class Codes: B61D 7/26 mechanical
• CPC Class Codes: F16D 19/00 Clutches with mechanically-actuated clutching members not otherwise provided for

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.

Claims

1. A connecting rod type two-level locking device, comprising 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, wherein the door opening arm comprises a master arm and a slave arm, a slotted hole is formed on one end of the master arm, the other end of the master arm is fixedly connected to the transmission shaft, the first locating pin is fixedly connected to the first roller, the first roller forms a sliding pair with the slotted hole through the first locating pin, the second roller is hinged with one end of the slave arm, and the other end of the slave arm is fixedly connected to the transmission shaft;

the standstill locking disk is fixedly connected to the transmission shaft, and convex teeth are arranged at the bottom end of the standstill locking disk;

the linkage mechanism comprises an unlocking lever, an unlocking connecting rod and a linkage locking pawl, the unlocking lever is provided with an end a and an end b, the unlocking connecting rod is provided with an end c and an end d, the linkage locking pawl is provided with an end m and end n, the end b of the unlocking lever is hinged with the end c of the unlocking connecting rod, and the end d of the unlocking connecting rod is hinged with the end m of the linkage locking pawl;

the middle position of the unlocking lever is hinged with the master arm, the end a of the unlocking lever is lapped on the first roller, and the end n of the linkage locking pawl is hinged with the slave arm;

in general, the first locating pin is located at the lower semicircle of the slotted hole, at this time, the end m of the linkage locking pawl abuts against the convex teeth, and the connecting rod type two-level locking device is a truss;

when the first roller is applied with an upward acting force, the first roller is driven by the first locating pin to slide upwards in the slotted hole, when the first locating pin is located at the upper semicircle of the slotted hole, the end m of the linkage locking pawl deviates from the convex teeth, at this time, a force is continuously applied to the first roller, and the slave arm moves together with the master arm and the linkage mechanism.

2. The connecting rod type two-level locking device of claim 1, further comprising a torsion spring, wherein the torsion spring is sleeved on the hinge point of the end n of the linkage locking pawl and the slave arm in an intercrossing manner, one end of the torsion spring is fixedly connected to the slave arm, the other end of the torsion spring is fixedly connected to the linkage locking pawl, and the torsion spring can provide a standstill locking force to the linkage mechanism.

3. The connecting rod type two-level locking device of claim 1, wherein a reserved amount is arranged between the end m of the linkage locking pawl and the convex teeth, and the range of the reserved amount is the maximum dead point passing position to the maximum dead point departing position of the door opening arm.

4. The connecting rod type two-level locking device of claim 3, wherein the range of the reserved amount is the maximum dead point passing position to the minimum dead point passing position of the door opening arm.

5. A hopper car bottom door, comprising the connecting rod type two-level locking device of claim 1.

6. A hopper car bottom door, comprising the connecting rod type two-level locking device of claim 2.

7. A hopper car bottom door, comprising the connecting rod type two-level locking device of claim 3.

8. A hopper car bottom door, comprising the connecting rod type two-level locking device of claim 4.

9. A hopper car, comprising the hopper car bottom door of claim 5.

10. A hopper car, comprising the hopper car bottom door of claim 6.

11. A hopper car, comprising the hopper car bottom door of claim 7.

12. A hopper car, comprising the hopper car bottom door of claim 8.