Hook-headed type wedge key anti-loosening device of railway wagon and railway wagon

Abstract

The invention discloses a hook-headed wedge key anti-loosening device of a railway wagon and the railway wagon, and relates to the technical field of railway wagons. The hook-headed wedge key anti-loosening device is used for preventing a key connection structure of a transmission shaft and a crank throw from loosening, and comprises a hook-headed wedge key, a lever, a mounting seat and eyelet bolt, wherein the hook-headed wedge key is matched with a key groove in the transmission shaft and a key groove in the crank throw; one end of the lever abuts against the exposed end of the hook-headed wedge key, and a long round hole is formed in the other end of the lever; one side of the mounting seat is arranged on a web plate of the crank throw, and one end, close to the hook-headed wedge key, of the other side of the mounting seat is hinged with the middle part of the lever; and a round hole of the eyelet bolt is hinged to the end, away from the hook-headed wedge key, of the other side of the mounting seat, the middle of a threaded rod of the eyelet bolt penetrates through the long round hole of the lever, and a first adjusting nut and a second adjusting nut are arranged on the portions, on the two sides of the lever, of the threaded rod of the eyelet bolt respectively. The anti-loosening device is simple in structure, labor-saving, convenient to operate, fast, time-saving, capable of meeting the requirement for fast adjustment and capable of meeting the requirements for high reliability and safety.

Description

technical field [0001] The invention belongs to the technical field of railway freight cars, and more specifically relates to a coupler head type wedge key anti-loosening device for railway freight cars and a railway freight car. Background technique [0002] At present, my country's railway coal and ballast hopper cars all adopt a two-stage transmission bottom door opening and closing mechanism, which is mainly composed of an upper transmission device, a connecting rod, and a lower transmission device. The upper bell crank drives the connecting rod to form a movement, and the connecting rod drives the lower bell crank at the end of the lower transmission shaft in the lower transmission device to rotate. ), the ejector rod (bottom door connecting rod) and other four-bar linkages control the opening and closing of the bottom door. [0003] As a common part of mechanical connection, the hook type wedge key is mainly used for the connection between the transmission shaft and the...

AI Technical Summary

Problems solved by technology

[0005] 1. The anti-loosening effect is not good. The hook head type wedge key is anti-loosening through the self-locking of the inclined surface, but in actual use, there are loosening phenomena due to factors such as oil immersion and long-term alternating loads.

[0006] 2. Once the hook head type wedge key is loosened, the side of the key will become the working surface. Due to the small thickness of the key body, the extrusion stress of the keyway will increase sharply, which will often cause the keyway to be deformed and damaged by extrusion

[0007] 3. There is a risk of the hook-shaped wedge key falling off. Once it falls off, the bottom door of the railway freight car may be accidentally opened due to the failure of the locking function of the transmission mechanism, resulting in the unloading of the goods to the track and affecting the safety of train transportation.

[0009] 1. It is inconvenient to replace and repair the parts on the transmission shaft 3', and the manufacturing and repairing efficiency is low, resulting in high manufacturing and repairing costs and potential safety hazards

When repairing and replacing the parts on the transmission shaft 3', it is necessary to cut off the iron block welded at the end of the transmission shaft 3', and then weld it after assembly, and if the welding precautions are not taken properly, the axle end bearing of the bogie of the vehicle will be damaged. Bearing pitting corrosion and other problems caused by over-electricity will affect driving safety

[0010] 2. Due to the influence of the manufacturing error and welding deformation of the iron stop 1', there may be a gap between the iron stop 1' and the hook-shaped wedge key 2' after assembly and welding. In order to eliminate the gap, the iron stop 1' should be pressed tightly against the hook-shaped wedge key 2'. Hammers are often used on site to hit the iron stop. Due to the space limitation between the stop iron 1' and the shaft end surface, only one side welding can be used and the weld seam is relatively short, which is easy to cause defects such as weld cracks. In addition, hammering will further cause the block If the iron 1' falls off, at this time, the anti-loosening function of the hook-shaped wedge key 2' will fail, and the fall-off of the iron stop 1' may hit the railway signal and other facilities on the ground, posing a safety hazard

[0011] 3. The iron stop 1' is an L-shaped cantilever structure, which has eccentricity, and the force is not good, and the iron stop 1' adopts a steel plate bending structure. In order to facilitate bending, the steel plate is made of a thin-walled steel plate, so the iron stop 1' The rigidity is small, and when the hook head type wedge key 2' escapes toward the shaft end, it is easy to cause the deformation of the iron stopper 1', resulting in the failure of the anti-loosening function of the hook head type wedge key 2' by the stopper iron 1', and the hook head type wedge key 2' After the loosening, the extrusion stress of the keyway increases sharply, causing the keyway to be damaged by extrusion deformation

[0012] 4. After the iron stopper 1' is assembled, it is not easy to adjust the pressing force on the end of the hook head wedge key 2'. When the pressing force is too small to overcome the escape force of the hook head wedge key 2' or there is no pressing force , there will be a problem that the anti-loosening effect of the hook-shaped wedge key 2' will fail

However, this solution has problems such as large errors in the positioning dimensions of the matching holes, which will lead to difficulties in installing the anti-loosening screws, or the hook-shaped wedge key 2' will not be in the right position after assembly, causing problems such as insufficient pre-tightening force due to uneven force. The anti-loosening technology requires high manufacturing precision for the relevant matching transmission parts, and there are problems such as the hook head wedge key 2' cannot be used universally and the cost of repair is high, which affects the quality of the hook head wedge key 2', gears or crank throws 4' and other accessories. Interchangeability and repair efficiency, so there are problems such as low production efficiency and poor economy

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