Railway passenger car end pedaling device based on safety design

Abstract

The utility model provides a railway vehicle end part pedaling device based on safety design, which comprises a pedal, a frame, a mounting seat and a fastener, and is positioned at an end door at one end of a vehicle, the connection design is optimized, the lap joint is optimized into the hanging installation, the main stress of a bolt is improved into the direct stress of the frame, and during installation, the mounting seat is fixed on the frame. The bolt head is arranged on the upper portion, the nut is arranged on the lower portion, even if the nut is loosened, the frame cannot fall off, the secondary protection effect is achieved, the newly developed tread anti-skid design develops a tooth-shaped protrusion anti-skid scheme on the basis of the original punching protrusion design, the friction force during treading is effectively increased, and the use safety is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to railcar body structure, especially railcar end part of the device for climbing on the car. BACKGROUND

[0002] At present, the design of the railcar end part climbing on the car should fully consider safety and ergonomics, and a climbing system for the driver to climb on the car is often designed at one end of the vehicle, which mainly meets and ensures the safe entry and exit of the driver from the end door at one end of the vehicle, and the existing climbing ladder is connected to the vehicle body in a "overlapping" manner and then fixed at the mounting seat of the vehicle body by bolt pre-tightening force. Once the bolt loosens, the bolt is subjected to shear force, which easily leads to the falling of the climbing ladder, affecting the safety of the driver climbing on the car and even the operation safety of the vehicle. Therefore, the design not only needs to ensure the functional requirements, but also needs to ensure the safety of the driver. The traditional end part climbing on the car design often starts from the optimal development cost and manufacturing accessibility, and does not fully consider the connection mode of the parts and the vehicle body and the anti-slip safety design. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the utility model is to improve the safety of the driver climbing on the car by the new "tooth-shaped protrusion" anti-slip design, and to enhance the linking safety of the climbing ladder and the vehicle body by the "hanging" structure. At the same time, the bolt used for fastening the climbing ladder is inserted from top to bottom, which avoids the risk of direct falling of the bolt caused by loosening of the nut.

[0004] To achieve the above purpose, the utility model provides a railcar end part climbing on the car device based on safety design, which comprises a pedal, a frame, a mounting seat and a fastener. The device is located at the end door at one end of the vehicle, a tooth-shaped hole is arranged on the tread of the pedal, and then the pedal is punched to form a protruding tooth shape. The pedal and the frame formed by bending are assembled and welded by Tig welding. The mounting seat is welded at the end part of the vehicle body steel structure chassis. The upper part of the frame is connected to the mounting seat welded at the end part of the vehicle body chassis.

[0005] Further, the upper part of the frame is bent on both sides and in an "L" shape. The upper part of the frame is hung on the mounting seat. The upper part of the frame and the mounting seat are respectively provided with mounting holes. The fastener comprises a bolt and a nut. The head of the bolt is at the upper part, and the nut is at the lower part. The bolt is inserted into the mounting hole from the upper part, and the nut is used to fix the frame and the mounting seat. Even if the nut loosens, the frame will not fall off, which plays a "secondary" protection role.

[0006] Further, the mounting seat can be made of carbon steel or stainless steel.

[0007] This utility model optimizes the connection design, changing from "lap joint" to "hanging" and improving the load-bearing structure from bolts to the frame. During installation, the bolt head is on top and the nut is on the bottom, so even if the nut loosens, the frame will not fall off, providing a "secondary" protection. The newly developed anti-slip design for the tread surface, based on the original punched protrusion design, has developed a toothed protrusion anti-slip solution, which effectively increases the friction when stepping on the tread and significantly improves the safety of use. Attached Figure Description

[0008] Fig. 1 This is a schematic diagram of the device in operation;

[0009] Fig. 2 This is a front view of the device;

[0010] Fig. 3 This is a side view of the device;

[0011] Fig. 4 This is a top view of the device. Detailed Implementation

[0012] Reference Figs. 1 to 4 The entire device mainly consists of a pedal 1, a frame 2, a mounting base 3, fasteners 4, and toothed holes 5.

[0013] Based on the standard GB / T 33974-2017, a new anti-slip tread design has been developed. On the basis of the original (punched) protrusion design, a toothed protrusion design has been developed. This design mainly adopts stamping technology, laser or plasma cutting to form toothed holes 5, and then stamping them to form protruding teeth. The teeth are then bent to form pedals 1 of specified dimensions. After the pedals 1 are formed, they are assembled and welded with the bent pedal frame 2 using Tig welding. Finally, the whole system is sandblasted and passivated to achieve corrosion protection.

[0014] The raw material of the mounting base 3 can be consistent with the material of the welding part of the vehicle body, namely carbon steel or stainless steel. After being stamped, the mounting base 3 is welded to the end of the steel structure of the vehicle body. If it is made of stainless steel, it is passivated; if it is made of carbon steel, it is painted. The purpose of both is to prevent rust.

[0015] This device is located at the end door of one end of the vehicle. The upper part of the frame 2 is connected to the mounting base 3 welded to the end of the vehicle body frame. The upper part of the frame 2 is bent on both sides and is in the shape of an "L". The upper bent part of the frame 2 is hung on the mounting base 3. The upper bent part of the frame 2 and the mounting base 3 are respectively provided with mounting holes. The fastener 4 includes a bolt and a nut. The bolt head is on the upper part and the nut is on the lower part. The bolt extends from the top into the mounting hole and the nut fixes the frame 2 and the mounting base 3. Even if the nut is loose, the frame 2 will not fall off, which plays a "secondary" protective role.

[0016] In operation, the device is usually connected to the upper part of the frame 2 by bolts, and is welded to the mounting seat 3 at the bottom of the vehicle body. After the bolts are tightened according to the torque requirements and marked with a lock mark, the installation is complete. During vehicle debugging and operation, the driver steps on the device to enter and exit the outer door of the driver's cabin, and the pedal 1 with a tooth-shaped hole 5 is stamped and formed, and is welded with the frame 2 of the vehicle ladder to form a vehicle ladder.

Claims

1. A railcar end kick device based on a safety design, characterized in that, The device comprises a pedal, a frame, a mounting seat and a fastener, and is arranged at an end door of a vehicle. A tooth-shaped hole is arranged on a tread of the pedal, and the pedal is formed into a convex tooth shape by stamping. The pedal and the frame formed by bending are assembled and welded by Tig welding. The mounting seat is welded to an end of a steel structure chassis of the vehicle body. The upper part of the frame is connected to the mounting seat welded to the end of the chassis of the vehicle body.

2. A railcar end kick device based on a safety design according to claim 1, characterized in that, The upper part of the frame is bent and formed into an "L" shape on both sides. The upper part of the frame is hung on the mounting seat at the bent part. The bent part of the upper part of the frame and the mounting seat are respectively provided with mounting holes. The fastener comprises a bolt and a nut. The head of the bolt is at the upper part, and the nut is at the lower part. The bolt is inserted into the mounting hole from the upper part, and the nut is used to fix the frame to the mounting seat. Even if the nut is loose, the frame will not fall off, and a "second" protection effect is achieved.

3. A railcar end kick device based on a safety design according to claim 1, characterized in that, The mounting seat can be made of carbon steel or stainless steel.

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