Search

EP-4467414-B1 - BUFFER STOP

EP4467414B1EP 4467414 B1EP4467414 B1EP 4467414B1EP-4467414-B1

Inventors

  • YANG, XIN
  • ZHOU, JUNFENG
  • GUO, PENGFEI
  • XU, XIN
  • HAN, XU

Dates

Publication Date
20260506
Application Date
20221129

Claims (10)

  1. A buffer stop, comprising: a mounting seat (1), and a stopping cap (2) made of a rubber material, wherein the stopping cap (2) is connected to the mounting seat (1) to enclose and form an accommodation cavity (A) being sealed, and characterised in that the accommodation cavity (A) is filled with a fluid medium; and a buffer cylinder (3) and a resilient member (4) provided in the accommodation cavity (A), wherein the buffer cylinder (3) comprises a cylinder body (31) and a piston (32), the piston (32) is provided with a damping hole, the piston (32) is connected with the resilient member (4), one of the cylinder body (31) and the resilient member (4) is configured to interact with the stopping cap (2), and the other one of the cylinder body (31) and the resilient member (4) is configured to interact with the mounting seat (1).
  2. The buffer stop according to claim 1, wherein the mounting seat (1) comprises a body (11) and a barrel body (12), the body (11) is provided with a thread hole, the barrel body (12) comprises a peripheral wall portion and a bottom wall portion, the peripheral wall portion is assembled to the thread hole by a thread, and the other one of the cylinder body (31) and the resilient member (4) is configured to interact with the bottom wall portion.
  3. The buffer stop according to claim 2, wherein a portion of the peripheral wall portion located in the accommodation cavity (A) is provided with a limiting component (121), and the limiting component (121) is for limiting in cooperation with the body (11).
  4. The buffer stop according to claim 2, comprising a locking nut (5), wherein the locking nut (5) is screwed onto the peripheral wall portion, and abuts against a face of the body (11) away from the accommodation cavity (A).
  5. The buffer stop according to claim 2, wherein the resilient member (4) is a spring, and a portion of the spring is located in the barrel body (12), and abuts against the bottom wall portion.
  6. The buffer stop according to any one of claims 1 to 5, wherein the mounting seat (1) is made of a metal material; and/or a coating is provided on an inner wall surface of the stopping cap (2).
  7. The buffer stop according to any one of claims 1 to 5, comprising a spacer (6), wherein the spacer (6) is arranged between the mounting seat (1) and a to-be-mounted component (7).
  8. The buffer stop according to claim 7, wherein the spacer (6) is made of a non-metallic material.
  9. The buffer stop according to claim 7, wherein the spacer (6) is provided with an avoidance hole (61).
  10. The buffer stop according to any one of claims 1 to 5, wherein the fluid medium is at least one of a gas medium and a liquid medium.

Description

The present application claims the priority to Chinese Patent Application No. 202210051136.X, titled "BUFFER STOP", filed with the China National Intellectual Property Administration on January 17, 2022. FIELD The present application relates to the technical field of stop structures, and in particular to a buffer stop. BACKGROUND A conventional buffer stop, being applied to a rail vehicle or the like, is generally a rubber buffer stop, which is made of a single material and has a limited buffering and stopping performance. Furthermore, based on characteristics of rubber, a relation between its stiffness and a compression distance thereof is simply a non-linear curve (a compression stiffness curve). Adjusting the compression stiffness curve can only be achieved by changing the type of rubber, which leads to a limited adjusting range. Document CN 208 760 632 U, which is considered to be a relevant prior-art document, discloses a relevant buffer stop according to the pre-amble of claim 1. SUMMARY An object of the present application is to provide a buffer stop, which has a good buffering and stopping performance, and facilitates adjusting and easily forms various compression stiffness curves, so as to better satisfy using demands. To solve the above technical problem, a buffer stop provided according to the present application includes: a mounting seat, and a stopping cap made of a rubber material, and the stopping cap is connected to the mounting seat to enclose and form an accommodation cavity being sealed, and the accommodation cavity is filled with a fluid medium; anda buffer cylinder and a resilient member provided in the accommodation cavity, and the buffer cylinder includes a cylinder body and a piston, the piston is provided with a damping hole, the piston is connected with the resilient member, one of the cylinder body and the resilient member is configured to interact with the stopping cap, and the other one of the cylinder body and the resilient member is configured to interact with the mounting seat. Applying the above structure, in a case that the stopping cap contacts a to-be-stopped component and is compressed and deformed, both the stopping cap itself and the fluid medium in the accommodation cavity can resist the above deformation. Furthermore, the fluid medium in a cavity formed being enclosed by the cylinder body and the piston can enter the accommodation cavity through the damping hole. After being damped by the damping hole, the fluid medium is more difficult to flow out of the buffer cavity, which can resist the deformation of the stopping cap to a greater degree. Moreover, in a case that the piston contacts a bottom wall portion of the cylinder body, the resilient member can directly resist the deformation of the stopping cap. In this way, the buffer stop according to the present application has multiple forms of buffering and stopping, therefore having a better buffering and stopping performance. In addition, since the buffer stop in the present application is provided with the fluid medium, the damping hole, the resilient member and other multiple components having the buffering and stopping performance, in specific practice, compression stiffness curves with various shapes can be formed by adjusting the type of the fluid medium, the size of the damping hole and the type of the resilient member, in cooperation with adjusting the material of the stopping cap, thereby better satisfying using demands. In one embodiment, the mounting seat includes a body and a barrel body, and the body is provided with a thread hole, the barrel body includes a peripheral wall portion and a bottom wall portion, the peripheral wall portion is assembled to the thread hole by thread, and the other one of the cylinder body and the resilient member is configured to interact with the bottom wall portion. In another embodiment, a portion of the peripheral wall portion located in the accommodation cavity is provided with a limiting component, and the limiting component is for limiting in cooperation with the body. In another embodiment, the buffer stop further includes a locking nut, and the locking nut is screwed onto the peripheral wall portion, and abuts against a face of the body away from the accommodation cavity. In another embodiment, the resilient member is a spring, and a portion of the spring is located in the barrel body, and abuts against the bottom wall portion. In another embodiment, the mounting seat is made of a metal material; and/or, a coating is provided on an inner wall surface of the stopping cap. In another embodiment, the buffer stop further includes a spacer, and the spacer is arranged between the mounting seat and a to-be-mounted component. In another embodiment, the spacer is made of a non-metallic material. In another embodiment, the spacer is provided with an avoidance hole. In another embodiment, the fluid medium is at least one of a gas medium and a liquid medium. BRIEF DESCRIPTION OF