A new type of hand brake device for railway wagons with pulleys

Abstract

The invention belongs to a railway wagon braking system and particularly relates to a novel railway wagon hand braking device with a movable pulley. The novel railway wagon hand braking device comprises a front braking lever of a wind braking device and a wagon body assembly; the wind braking device is arranged below a side beam in the middle of the wagon body assembly; a hand brake mounting seat is fixed on the wagon body assembly; the hand brake mounting seat is arranged on one side of the front braking lever; a hand brake is mounted on the hand brake mounting seat; a chain mounting seat is fixed at the upper end of the hand brake mounting seat; a movable pulley assembly connection hole is formed in the head part of the front braking lever; the front braking lever is connected with a movable pulley assembly through the movable pulley assembly connection hole; a chain assembly crosses over the movable pulley assembly; one end of the chain assembly is connected with the chain mounting seat; an European-type dual-ring buckle is arranged at the other end of the chain assembly; and the other end of the European-type dual-ring buckle is connected with a chain link of the hand brake.

Description

technical field [0001] The invention belongs to the braking system of railway freight cars, in particular to a novel hand braking device for railway freight cars with pulleys. Background technique [0002] The hand brake is used to produce a braking effect when the railway vehicle is shunting to prevent the parked vehicle from slipping away. The braking ratio is directly related to whether the vehicle can be parked safely as required. At present, railway freight cars are usually arranged under the car body underframe, and the hand brake pull rod that drives the pulley device near the center beam is used to amplify the manual force magnification and transmit the hand brake force to the wind brake foundation brake device. The original hand brake tie rod reinforcement is welded by three round steels with a diameter of 16 mm. Due to sudden changes in geometric dimensions, the stress at this place is very concentrated, and it is possible that the hand brake tie rod reinforcement ...

AI Technical Summary

Problems solved by technology

The original hand brake tie rod reinforcement is welded by three round steels with a diameter of 16 mm. Due to sudden changes in geometric dimensions, the stress at this place is very concentrated, and it is possible that the hand brake tie rod reinforcement (that is, 3 Cracks and breaks occur at the welded part of the round steel group). In addition, the positioning of the hand brake lever bracket is not accurate. After the hand brake is tightened, the tie rod reinforcement will be pulled out of the bracket. , because there is a step at the reinforcing rib, it cannot automatically return to the bracket, so that the bracket is supported on the single round steel of the tie rod during use

In addition, the reinforcement of the hand brake pull rod and the pulley are relatively heavy, and the stress state is not good, and the reinforcement is easily broken during operation.

The hand brake lever chain is too long, the brake round pin is lost, broken or the brake adjuster fails, etc., which will also cause the reinforcing rib to be pulled out of the lever bracket, and it is easy to lift and cause the reinforcing rib to break suddenly during operation.

Once the reinforcing rib of the hand brake tie rod breaks or falls off, it will hit the ground facilities such as sleepers or turnouts, affecting driving safety

[0003] Since newly designed railway wagons generally use relatively short draw beams and traditional hand brake pulley devices, and when the hand brake is in the release position, the distance between the hand brake chain at the joint of the moving pulley and the axle and wheels is relatively close and It is possible to bump into the axle or wheel, causing the chain to rub against the axle or wheel, which affects driving safety, which causes great difficulties to the traditional design of the hand brake lever that drives the pulley device, and even cannot be arranged

[0004] The traditional hand brake lever device with pulleys is mainly installed on the bottom frame of the railway wagon close to the end beam and the middle beam, and this place is close to the bogie, resulting in a narrow space and difficult access for the operator. Therefore, manual assembly, inspection and maintenance Inconvenience caused by the moving rod device

[0005] The traditional pulley pulley hand brake lever device includes movable pulley, movable pulley, hand brake pull rod, pull rod guide frame, chain and other accessories, so there are many accessories, complex assembly and maintenance processes, low production efficiency, and hand brake transmission. Low efficiency and other issues

[0006] In addition, the narrow-gauge railway freight car bogie and the lower part of the car body frame are relatively compact, and the traditional hand brake device scheme with pulleys cannot be used in the design of the hand brake device.

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