A telescopic and foldable brake crank for rail vehicle hand brake

Abstract

The invention discloses a telescopic folding braking crank for hand braking of a rail vehicle. Chutes are formed inside both ends of a rotating rod; sliding rods are arranged in a sliding mode in the chutes; handgrips are arranged on the sliding rods; the sliding rods as well as the handgrips can slide in the chutes together, and stop blocks for preventing the sliding rods from falling out of the chutes are arranged at one ends of the sliding rods, which are positioned in the chutes; the handgrips are hinged to the sliding rods, can rotate around hinged shafts, and form two relative position states with the rotating rod, i.e., a perpendicular state and a parallel state. According to the telescopic folding braking crank disclosed by the invention, a length of the rotating rod is designed into an adjustable length, and a suitable length can be selected according to the space size of an operation environment; the length of the rotating rod is regulated, and rotating radii of the handgrips are changed, so that rotation of the handgrips becomes more flexible and convenient; the rotating rod with a proper length can be selected according to personal conditions, so that the telescopic folding braking crank is more comfortable and efficient to use; the rotating rod can extend and retract and the handgrips can be folded, so that the space is saved, and the telescopic folding braking crank is also more attractive in appearance.

Description

technical field [0001] The invention relates to the technical field of rail vehicle brakes, in particular to a retractable and foldable brake crank for rail vehicle hand brakes. Background technique [0002] Railway passenger car braking system is generally divided into air brake and hand brake, wherein the hand brake is realized by turning the brake handle artificially, that is, by manpower. Existing hand brake handles, such as figure 1 As shown, the length is long, and the length cannot be adjusted. When the staff is operating, the arm turns a large range, and the number of turns is large, which is very inconvenient to use and operate. Specifically, there are the following shortcomings: [0003] (1) The length of the crank is a fixed value, and the appropriate arm size cannot be adjusted according to personal force habits and body differences. [0004] (2) Since the handle is relatively long and the range of rotation is relatively large, it is inconvenient to rotate when...

AI Technical Summary

Problems solved by technology

Existing hand brake handles, such as figure 1 As shown, the length is long, and the length cannot be adjusted. When the staff is operating, the arm turns a large range, and the number of turns is large, which is very inconvenient to use and operate. Specifically, there are the following shortcomings:

[0003] (1) The length of the rocker is a fixed value, and the appropriate arm size cannot be adjusted according to personal force habits and physical differences

[0004] (2) Since the handle is long and the rotation range is large, it is very inconvenient to rotate when the force on the handle is small

[0005] (3) The shape is large and takes up a lot of space, which affects the appearance from the perspective of appearance

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