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Round tube combination buffering device

A buffer device and circular tube technology, applied in the direction of elastic shock absorbers, etc., can solve the problems of large load fluctuations, unstable buffer force, and low ratio, and achieve low cost, stable impact force, and average load/peak load ratio high effect

Inactive Publication Date: 2013-11-27
NORTHWEST INST OF NUCLEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3. When the thin-walled metal pipe buckles axially, the load fluctuates greatly, the buffer force is not stable, and the load efficiency, that is, the ratio of average load / peak load is usually low

Method used

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  • Round tube combination buffering device
  • Round tube combination buffering device
  • Round tube combination buffering device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1: Combining figure 1 Describe this embodiment, the buffer of this embodiment includes a small round tube 1 and a large round tube 2; the small round tube 1 is provided with a first boss 4, the large round tube 2 is provided with a second boss, the first boss 4 and the second The two bosses 5 are closely matched to realize the restraint and positioning of the small round tube 1 and the large round tube 2, and ensure that the round tube combined buffer device does not lose stability during deformation and energy absorption; the destructive strength of the small round tube 1 and the large round tube 2 is different, It is necessary to ensure that the higher-strength round pipe does not undergo plastic deformation during the shearing and extrusion deformation of the lower-strength round pipe, and the round pipe that undergoes shear deformation in the round-pipe combined buffer device is a plastic material.

Embodiment 2

[0055] Example 2: Combining figure 1 and figure 2 Describe this embodiment, the buffer of this embodiment includes a small round tube 1 and a large round tube 2; The restraint and positioning of the large round tube 2 ensure that the round tube combined buffer device will not lose stability during deformation and energy absorption.

Embodiment 3

[0056] Example 3: Binding figure 1 and image 3 Describe this embodiment, the buffer of this embodiment includes a small round tube 1 and a large round tube 2; The restraint and positioning of the large round tube 2 ensure that the round tube combined buffer device will not lose stability during deformation and energy absorption.

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Abstract

The invention discloses a round tube combination buffering device which comprises a large round tube and a small round tube which have different strengths and are contacted in sequence in the load direction. Wherein the inner diameter of large round pipe is slightly smaller than the outer diameter of the small round pipe; the round tubes with different strengths and different sizes are overlapped coaxially; under the condition that the volume of a plurality of layers of round tube buffering device is not changed, a manner of absorbing energy by single circular tube flexion deformity is changed into a manner of absorbing energy by shear failure among the round tubes; the device has the advantages that the energy absorption amount in unit volume is large, impact force is stable, and the ratio value of a mean load / a peak load is relatively high, so that a protected object can be well protected.

Description

technical field [0001] The invention relates to a load buffering energy-absorbing method and device, in particular to a load buffering energy-absorbing method and device combined with circular tubes. Background technique [0002] Metal thin-walled circular tubes have a stable structure, stable deformation and failure modes, and controllable energy absorption. Therefore, as buffer energy-absorbing structures, they are widely used in fields closely related to collision safety, such as vehicles, spacecraft, and engineering protection. However, metal thin-walled circular tubes have some shortcomings in the process of absorbing impact energy as buffer devices: [0003] 1. The deformation mode will be affected by factors such as the diameter-thickness ratio and length-to-diameter ratio of the metal pipe. For example, a metal pipe with an excessively large length-to-diameter ratio will undergo Euler buckling and fail to achieve the purpose of buffering; [0004] 2. After the buckl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F7/12
Inventor 徐海斌谭书舜张德志马艳军李运良李进
Owner NORTHWEST INST OF NUCLEAR TECH
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