Hydraulic oil ring spring buffer suitable for connecting car coupler device of motor train unit
Through the design of hydraulic oil ring spring buffer combined with piston rod and throttle hole, the insufficient energy absorption capacity and leakage of the EMU connection hook device is solved, achieving better energy absorption and buffering effect, and the initial pressure is stable and reliable.
Patent Information
- Application Number
- CN202422812175.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-19
AI Technical Summary
The buffers connected to the hook device of the existing EMU have limited energy absorption capacity, and the gas-liquid buffers are prone to leakage, making it difficult to adapt to high impact strength working conditions.
A hydraulic oil ring spring buffer is designed to combine hydraulic oil with the ring spring. Through the cooperation of the piston rod and the throttle hole, the flow of hydraulic oil generates damping force and elastic reset of the ring spring to achieve energy absorption and buffering.
It improves the energy absorption and buffering performance of the buffer, and the initial pressure is stable and reliable, avoids gas leakage and reduces maintenance costs.
Smart Images
Figure CN223266790U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of buffers, in particular to a hydraulic oil ring spring buffer suitable for a coupling device of an EMU. Background Art
[0002] Buffers are widely used as components for buffering and absorbing energy. They are used in mechanical vibration and impact such as vehicle equipment and power machinery. Their purpose is to alleviate unnecessary vibration and impact.
[0003] In order to connect two sets of trains and reduce the impact generated when the two sets of trains are connected, the connecting coupler device of the EMU train is usually equipped with a buffer inside. At present, the buffers commonly used in train couplers mainly include ring spring buffers, rubber buffers, clay buffers and gas-liquid buffers. Ring spring buffers are a type of buffer used in train couplers in the early days. They have a relatively simple structure, are easy to maintain, and have low maintenance costs. Rubber buffers are a type of buffer that uses the elastic deformation and shock absorption properties of rubber to alleviate mechanical shock. However, due to their small energy absorption capacity, they are no longer used as the main energy-absorbing and buffering elements of couplers. Clay buffers and gas-liquid buffers both use the viscous resistance of fluid flow to do work to absorb energy. However, the above-mentioned buffers generally have limited energy absorption capacity, and liquid buffers are prone to leakage, making it difficult to adapt to working conditions with high impact intensity. Therefore, there is a need to provide a buffer with better energy absorption and buffering performance. Summary of the Invention
[0004] The technical problem to be solved by the utility model is to provide a hydraulic oil ring spring buffer suitable for the EMU vehicle coupler device. The device introduces a buffer combining hydraulic oil and a ring spring into the EMU vehicle coupler structure to avoid leakage caused by sealing problems and has better energy absorption and buffering performance.
[0005] The technical solution to the technical problem to be solved by the present invention is: a hydraulic oil ring spring buffer suitable for a coupling device of an EMU, comprising a piston rod, a sealing end cover, a throttle hole, a piston, hydraulic oil, a cylinder body and a ring spring; the sealing end cover is arranged on the cylinder body, and a closed space is formed inside the two to be filled with hydraulic oil; the piston rod passes through the sealing end cover, one end is arranged outside the sealing end cover and the cylinder body, and the other end is fixedly connected to the ring spring, and hydraulic oil is filled between the piston rod and the cylinder body; the ring spring is arranged inside the cylinder body and does not contact the hydraulic oil, and can be compressed when the ring spring is subjected to the thrust of the piston rod, and can slowly return to its original position under the action of elastic force when the thrust of the piston rod disappears; a piston is integrally formed on the piston rod, and the piston is located inside the cylinder body and is provided with at least one throttle hole. When the piston rod drives the piston to move laterally in the cylinder body, the hydraulic oil can flow from one side of the piston to the other side of the piston through the throttle hole in the cylinder body.
[0006] The ring spring is initially in a compressed state. When the EMU coupler is connected, the external pressure on the piston rod exceeds the initial pressure of the ring spring, and the piston rod begins to move, thereby compressing the hydraulic oil on the right side of the piston. The pressurized hydraulic oil flows to the left side of the piston through the throttle hole on the piston, generating a damping force to the left during the flow. At the same time, the ring spring is also compressed. When the piston reaches the rightmost side of the hydraulic oil chamber, the hydraulic oil stops flowing through the throttle hole, and the damping force disappears. At this time, the compression force of the ring spring reaches its maximum value. The piston rod body then moves to the left and resets under the action of the ring spring force. During the reset process, the hydraulic oil on the left side of the piston is pressurized and flows through the throttle hole, generating a damping force to the right until the piston rod body returns to its initial position. During this process, the hydraulic oil ring spring buffer achieves the functions of energy absorption and buffering.
[0007] Positive effects of the present invention: The buffer of the present invention adopts a combination of hydraulic oil and ring spring for buffering, which improves the energy absorption and buffering effect of the buffer; in addition, compared with the gas-liquid buffer, the present invention uses a ring spring instead of compressed gas to provide the initial pressure, the initial pressure is more stable, and there is no risk of initial pressure reduction due to gas leakage, it is simpler and more reliable, and the maintenance cost is low. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0009] Figure 1 It is a cross-sectional diagram of a hydraulic oil ring spring buffer.
[0010] In the figure, 1 is piston rod, 2 is sealing end cover, 3 is throttle hole, 4 is piston, 5 is hydraulic oil, 6 is cylinder body, and 7 is ring spring. DETAILED DESCRIPTION
[0011] like Figure 1As shown, the utility model discloses a hydraulic oil ring spring buffer suitable for a train-train coupling device, comprising a piston rod (1), a sealing end cover (2), a throttle hole (3), a piston (4), hydraulic oil (5), a cylinder body (6) and a ring spring (7), wherein the sealing end cover (2) is arranged on the cylinder body (6), and a closed space is formed inside the two to be filled with hydraulic oil (5); the piston rod (1) passes through the sealing end cover (2), one end of which is arranged outside the sealing end cover (2) and the cylinder body (6), and the other end is fixedly connected to the ring spring (7), and the space between the piston rod (1) and the cylinder body (6) is filled with hydraulic oil (5); the ring spring (7) is fixedly connected to the ring spring (7), and the space between the piston rod (1) and the cylinder body (6) is filled with hydraulic oil (5); the ring spring (7) is fixedly connected to the ring spring (7), and the space between the piston rod (1) and the cylinder body (6) is filled with hydraulic oil (5); the ring spring (7) is fixedly connected to the ring spring (7), and the hydraulic oil (5) is fixedly connected to the ring spring (7). The spring (7) is arranged inside the cylinder body (6) and does not contact the hydraulic oil (5). When the ring spring (7) is subjected to the thrust of the piston rod (1), it can be compressed. When the thrust of the piston rod (1) disappears, the ring spring (7) can slowly return to its original position under the action of the elastic force. The piston rod (1) is integrally formed with a piston (4), and the piston (4) is located inside the cylinder body (6) and is provided with at least one throttle hole (3). When the piston rod (1) drives the piston (4) to move horizontally in the cylinder body (6), the hydraulic oil (5) can flow from one side of the piston (4) to the other side of the piston (4) through the throttle hole (3) in the cylinder body (6).
[0012] Working process: The ring spring (7) is initially in a compressed state. When the EMU coupler is connected, the piston rod (1) is subjected to an external impact force, the pressure of which exceeds the initial pressure of the ring spring (7), and the piston rod (1) begins to move. Figure 1 The piston (4) moves to the right, thereby compressing the hydraulic oil (5) on the right side of the piston (4). The pressurized hydraulic oil (5) flows to the left side of the piston (4) through the throttle hole (3) on the piston (4), and a damping force to the left is generated during the flow. At the same time, the ring spring (7) is also compressed. When the piston (4) reaches the rightmost side of the hydraulic oil chamber, the hydraulic oil (5) stops flowing through the throttle hole, and the damping force disappears. At this time, the compression force of the ring spring (7) reaches its maximum value. Afterwards, the piston rod (1) moves to the left and resets under the action of the elastic force of the ring spring (7). During the reset process, the hydraulic oil (5) on the left side of the piston (4) is pressurized and flows through the throttle hole (3), generating a damping force to the right until the piston rod (1) returns to its initial position. In this process, the hydraulic oil ring spring buffer achieves the function of energy absorption and buffering.
[0013] The above figure only illustrates some functional structural principles of a hydraulic oil ring spring buffer suitable for connecting the coupler device of an EMU related to the present invention. Since it is easy for technicians in the same technical field to make several modifications on this basis, this specification is not intended to limit the hydraulic oil ring spring buffer suitable for connecting the coupler device of an EMU described in the present invention to the specific structure and applicable scope shown or described. Therefore, all corresponding modifications and equivalents that may be used are within the scope of protection of the present utility model patent.
Claims
1. A hydraulic oil ring spring buffer suitable for connecting a coupler device of an EMU, characterized by: It includes a piston rod, a sealing end cover, a throttle hole, a piston, hydraulic oil, a cylinder body and a ring spring; the sealing end cover is arranged on the cylinder body, the piston rod passes through the sealing end cover, one end is arranged on the outside of the sealing end cover and the cylinder body, and the other end is fixedly connected to the ring spring, hydraulic oil is filled between the piston rod and the cylinder body, the ring spring is arranged inside the cylinder body, the ring spring does not contact the hydraulic oil, the piston rod is integrally sleeved with a piston, the piston is located inside the cylinder body and is provided with at least one throttle hole, when the piston rod drives the piston to move laterally in the cylinder body, the hydraulic oil can flow from one side of the piston to the other side of the piston through the throttle hole in the cylinder body.