Front suspension system having overload protection

Abstract

Disclosed is a front suspension system having overload protection. The system comprises a mounting seat, a centering device, a support device used for supporting a coupling buffer and a coupling end pin, wherein the mounting seat is connected to a railway vehicle body, and the centering device and the support device are both installed on the mounting seat. The system further has a coupling connection seat and an overload protection element, wherein the coupling connection seat comprises a base and a coupling connection part connected as one with the base. The base is connected to a rear face of the mounting seat by means of the overload protection element. The coupling connection part passes through a through hole provided in the middle of the mounting seat and is connected with the coupling buffer by means of the coupling end pin. The coupling connection part is closely fitted with the through hole. The front suspension system has a simple structure and is lightweight.

Claims

1. A front suspension system having overload protection comprising a mounting seat, a centering device, a support device for supporting a coupling buffer and a coupling end pin, wherein the mounting seat is connected to a railway vehicle body, and the centering device and the support device are installed on the mounting seat; wherein the system further comprises a coupling connection seat and an overload protection element, the coupling connection seat comprises a base and a coupling connection part connected with the base; the base is connected to a rear face of the mounting seat by the overload protection element which is breakable under an overload; the coupling connection part passes through a through hole provided in a central portion of the mounting seat and is connected with the coupling buffer by the coupling end pin; the coupling connection part is tightly fitted with the through hole.

2. The front suspension system having overload protection according to claim 1, wherein the through hole positioned in the central portion middle of the mounting seat is a cylindrical through hole, the coupling connection part is of a cylindrical shape, and an inner diameter of the through hole is equal to an outer diameter of the coupling connection part.

3. The front suspension system having overload protection according to claim 1, wherein the overload protection element comprises four snap bolts.

4. The front suspension system having overload protection according to claim 2, wherein the overload protection element comprises four snap bolts.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a front perspective view of an embodiment of the invention.

(2) FIG. 2 is a right side view of an embodiment of the invention.

(3) FIG. 3 is a front view of an embodiment of the invention.

(4) FIG. 4 is a state diagram of the coupling buffer before the overload protection element comes into play in an embodiment of the invention.

(5) FIG. 5 is a state diagram of the coupling buffer after the overload protection element comes into play in an embodiment of the invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(6) Further description of the invention is made in combination with the accompanying drawings.

(7) Disclosed is a front suspension system having overload protection. The system comprises a mounting seat 1, a centering device 2, a support device 3 used for supporting a coupling buffer 8 and a coupling end pin 4, wherein the mounting seat 1 is connected to a railway vehicle body, and the centering device 2 and the support device 3 are both installed on the mounting seat 1. The system further has a coupling connection seat 5 and an overload protection element 6, and is provided with a cylindrical through hole 7, wherein the coupling connection seat 5 comprises a base 51 and a coupling connection part 52 connected as one with the base 51, the coupling connection seat 5 is cylindrical, the base 51 is connected to a rear face of the mounting seat 1 by means of the overload protection element 6; the coupling connection part 52 passes through the cylindrical through hole 7 provided in the middle of the mounting seat 1 and is connected with the coupling buffer 8 by means of the coupling end pin 4; the outer diameter of the coupling connection part 52 is equal to the inner diameter of the cylindrical through hole 7 provided in the middle of the mounting seat 1, and the coupling connection part 52 is closely fitted with the cylindrical through hole 7 provided in the middle of the mounting seat 1. The overload protection element 6 uses four snap bolts.

(8) The working principle: components in front of the coupler transmit load to the coupling buffer, and the coupling buffer is restricted by the coupling connection seat and the coupling end pin, thus being compressed; the overload protection element fails in case the compression load exceeds its design value, namely, four snap bolts are fractured, thus the connection between the coupling connection seat and the mounting seat is broken, so the coupling connection seat separates from the mounting seat, and the anticreeper and vehicle body energy absorption area of a vehicle impacted come into play; at this moment, both the vehicle body connecting base and the coupling buffer enter into the space under the vehicle body through the mounting seat, and continue to move backward under the action of impact load. Tractive force directly compresses the elastic component in the coupling buffer and is transmitted to the coupling connection seat, the mounting seat and the vehicle body in case the tractive force is applied to the coupler, and in this process the overload protection element bears no force.