Composite impact resistance apparatus and applications thereof

Patent metadata

Field	Value
Publication number	US-11879514-B2
Application number	US-202118043733-A
Country	US
Kind code	B2
Filing date	Jun 15, 2021
Priority date	Feb 23, 2021
Publication date	Jan 23, 2024
Grant date	Jan 23, 2024

Abstract

Disclosed are a compound impact-resistant device and an application thereof. The compound impact-resistant device includes an inner cylinder, a first pressure sensor and an outer cylinder; an inner cavity of the inner cylinder is connected to a magnetorheological damper, a spiral valve element, a floating piston and a spring from bottom to top; and the outer cylinder is connected to a piston rod, a bottom end of the piston rod penetrates a top of the inner cylinder, the spring and the floating piston to be connected to the spiral valve element, and a portion below the spiral valve element is filled with hydraulic oil. The compound impact-resistant device can provide specific initial support force and achieve active self-adaptation to dynamic impact, thus solving the problems that traditional hydraulic buffers cannot provide initial support force and traditional mechanical crushing members have difficulty in providing large support force.

First claim

What is claimed is:

1. A compound impact-resistant device, comprising an inner cylinder, a first pressure sensor and an outer cylinder, wherein the inner cylinder is connected to an inner bottom surface of the outer cylinder, and the first pressure sensor is placed in the outer cylinder and connected to a bottom of the inner cylinder;
an inner cavity of the inner cylinder is sequentially connected to a magnetorheological damper, a spiral valve element, a floating piston and a spring from bottom to top; and an inner top surface of the outer cylinder is connected to a piston rod, a bottom end of the piston rod penetrates a top of the inner cylinder, the spring and the floating piston to be connected to the spiral valve element, and a portion below the spiral valve element is filled with hydraulic oil;
wherein the outer cylinder comprises a top cover, a crushing member and a base which are connected in sequence from top to bottom, and an upper end and a lower end of the crushing member are inserted into recesses provided in the top cover and the base respectively; wherein the crushing member is in a hollowed structure, is provided with multi-layered staggered transverse openings and the crushing member is adapted for supporting, recessing and energy absorbing;
wherein a surface of the spiral valve element is provided with a plurality of circles of spiral recesses.

2. The compound impact-resistant device according to claim 1 , wherein an inner surface of the top cover is provided with a top cover welded member, and an upper end and a lower end of the piston rod are in threaded connection to the top cover welded member and the spiral valve element respectively.

3. The compound impact-resistant device according to claim 1 , wherein the inner cylinder comprises an end cover, a cylinder body and a cylinder base which are sequentially connected from top to bottom, the end cover being connected to the cylinder body by means of a bolt, the cylinder body being welded on the cylinder base, and the cylinder base being placed on the base of the outer cylinder.

4. The compound impact-resistant device according to claim 3 , wherein silicone seals are arranged between the floating piston and an inner wall of the cylinder body, between the piston rod and the end cover, and between the piston rod and the floating piston.

5. The compound impact-resistant device according to claim 3 , wherein a lower half of the cylinder body is provided with a sensor interface, and the first pressure sensor is in threaded connection to the sensor interface.

6. The compound impact-resistant device according to claim 1 , wherein the magnetorheological damper comprises a magnetorheological damper piston rod, a magnetorheological damper piston, a magnetorheological damper coil and a magnetorheological damper cylinder, wherein the magnetorheological damper piston is placed in the magnetorheological damper cylinder, the magnetorheological damper coil encircles the magnetorheological damper piston, and the magnetorheological damper piston rod extends into the magnetorheological damper cylinder to be connected to the magnetorheological damper piston.

7. The compound impact-resistant device according to claim 6 , wherein the compound impact-resistant device further comprises a control system, an outer surface of the top cover is provided with a second pressure sensor, and the first pressure sensor, the second pressure sensor and the magnetorheological damper coil are connected to the control system respectively.

8. A working method of the compound impact-resistant device according to claim 7 , comprising:
1) mounting the impact-resistant device at a position needs to bear impact buffering, and connecting a first pressure sensor, a second pressure sensor and a magnetorheological damper coil to a control system, wherein in this case, a magnetorheological damper outputs a maximum resistance, and the whole impact-resistant device is in a maximum buffer resistance output state;
2) collecting, when the impact-resistant device receives external impact pressure, pressure information and transmitting the pressure information to the control system by the second pressure sensor, and adjusting, by the control system, a current of the magnetorheological damper coil to cause an output resistance of the magnetorheological damper to be zero; wherein in this case, only a crushing member bears external impact pressure, and the crushing member is crushed and deformed; and
3) driving, when the crushing member deforms and descends, a top cover, a piston rod and a spiral valve element to move downwards synchronously, wherein hydraulic oil below the spiral valve element is pressed to flow through a spiral recess, thereby consuming impact energy.

Assignees

• Univ Shandong Science & Tech

Inventors

• Wang Chenglong
• Chen Meng

Classifications

• F16F13/007 Primary

  the damper being a fluid damper · CPC title

• F16F7/12

  using plastic deformation of members {(F16F9/30 takes precedence; yieldable means for mounting bumpers on vehicles B60R19/26; yieldable or collapsible steering columns B62D1/192)} · CPC title

• F16F9/3242

  of cylinder ends, e.g. caps · CPC title

• F16F9/3292

  Sensor arrangements · CPC title

• F16F9/34

  Special valve constructions ({F16F9/44, F16F9/50 take precedence; filtering details F16F9/3285} ; valves in general F16K); Shape or construction of throttling passages · CPC title