Anti-impact structure of shock absorber

Abstract

The utility model discloses an anti-impact structure of shock absorbers, which comprises a mounting base and eight shock absorbers positioned on the mounting base, and is characterized in that four corners of the upper surface and the lower surface of the mounting base are respectively provided with a groove, a port of each groove is correspondingly provided with one shock absorber, and the bottom end of each groove is provided with a rubber anti-vibration pad. And a space of 4 mm + / -0.1 mm exists between each rubber anti-vibration pad and the corresponding shock absorber, so that the shock absorbers are prevented from being directly contacted with the rigid mounting base during impact, and damage is avoided. Compared with the prior art, the shock resistance of the shock absorber is improved only by adding the rubber shock absorption pad, the structure is simple, and the cost is low; the requirements of small displacement and impact resistance of the shock absorber are met, and the shock absorption space is saved; and meanwhile, the rubber anti-vibration pad has a certain protection effect on the shock absorber, and the service life of the shock absorber can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to an anti-impact structure of shock absorber, can improve inertia sensitive component impact environment, promote shock absorber anti-impact performance, belong to inertia equipment anti-impact field. BACKGROUND

[0002] Impact is one of the necessary factors considered in product design in high-tech fields such as aerospace, and inertia sensitive devices are prone to damage and failure when subjected to high-frequency large-scale impact, and need to be designed for impact protection. Effective isolation or damping measures can improve the reliability and service life of inertia sensitive devices, and currently designers often use shock absorber isolation to reduce the negative impact of high-frequency impact on inertia sensitive devices. When the shock absorber is subjected to high-frequency impact, the sharply input energy is stored, and the system free vibration slowly releases the energy after impact, reducing the impact of external high-frequency impact on inertia sensitive devices.

[0003] The greater the stiffness of the shock absorber facing high-frequency impact, the worse the impact performance, and the worse the protection of the inertia sensitive device. A small stiffness requires more damping space to deform and store energy, and also easily causes the shock absorber to be damaged.

[0004] At present, there are many researches on shock absorber materials, structures and other aspects at home and abroad, which improve the impact mechanical properties of shock absorbers and achieve in-depth theoretical results. For example, S.Zh Shah et al. used fiber reinforced composite materials to improve the impact performance, and explored the influence of fiber fabric structure on the impact resistance of the material. A. Carrella et al. used a three-spring structure to realize the shock absorber to meet the smaller static displacement while realizing the smaller natural frequency under the vibration isolation. Yue Shuai et al. designed a reusable oil-honeycomb damper for device vertical landing, and analyzed the influence of the landing strut friction coefficient on the vibration isolation performance of the damper by modeling the damper. However, new materials and complex structures improve the impact resistance of shock absorbers and increase the product price and installation requirements. UTILITY MODEL CONTENT

[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, provide an anti-impact structure of shock absorber, improve the impact resistance of the shock absorber without increasing the damping space, and increase the impact protection of the inertia sensitive component.

[0006] The technical solution of the utility model is an anti-impact structure of shock absorber, comprising: a mounting base and eight shock absorbers located on the mounting base, wherein: recesses are arranged at the four corners of the upper surface and the lower surface of the mounting base, one shock absorber is installed at each recess port, and a rubber damping pad is installed at the bottom end of each recess.

[0007] Preferably, there is a space of 4mm±0.1mm between each rubber damping pad and the corresponding damper.

[0008] Preferably, the rubber damping pad is a cylindrical structure with a diameter of 25mm±0.1mm and a thickness of 2mm±0.1mm, and is made of silicone rubber GD414 and attached to the mounting base.

[0009] Preferably, the dampers are distributed in eight-point spatial symmetry, and each damper is the same distance from the center of mass of the mounting base.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] (1) Only rubber damping pads are added to improve the impact resistance of the damper, the structure is simple, and the cost is low;

[0012] (2) It meets the impact resistance requirements of small displacement (i.e. limited damping space) of the damper, and compared with only absorbing energy through deformation of the damper to reduce impact, it can save damping space;

[0013] (3) The rubber damping pad has a certain protective effect on the damper, and can improve the service life of the damper. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic view of the damper impact protection structure of the utility model;

[0015] Figure 2 It is a top view of the damper impact protection structure of the utility model;

[0016] Figure 3 It is a sectional view of the impact protection structure of the utility model. DETAILED DESCRIPTION

[0017] The utility model designs a damper impact protection structure, as shown in Figure 1 and Figure 3 , comprising: a mounting base 1, eight dampers 3, and eight rubber damping pads 2; as shown in Figure 2 and Figure 3 , recesses are arranged at the four corners of the upper surface and the lower surface of the mounting base 1, one damper 3 is installed at each recess port, and a rubber damping pad 2 is installed at the bottom end of each recess.

[0018] As shown in Figure 3 , there is a space of 4mm±0.1mm between each rubber damping pad 2 and the corresponding damper 3, which avoids direct contact between the damper 3 and the rigid mounting base 1 during impact, causing damage.

[0019] The rubber damping pad 2 is a cylindrical structure with a diameter of 25mm±0.1mm and a thickness of 2mm±0.1mm, and is attached to the mounting base using silicon rubber GD414.

[0020] The dampers 3 are eight-point spatially symmetrical, as shown in Figure 1 Each damper is the same distance from the center of mass of the mounting base.

[0021] The utility model adopts eight-point damping layout. The rubber damping pad 2 is added in the damping space between the damper 3 and the mounting base 1, so that the damper 3 and the rigid mounting base 1 are not directly contacted during impact, and damage is avoided.

[0022] 1. The rubber damping pad 2 is fixed to the bottom of the base using epoxy glue, and is left to stand for 12h to solidify.

[0023] 2. After the epoxy glue is solidified, the damper 3 is positioned and installed through process screws, and the installation position is centered to avoid contact between the damper glue and the mounting base. After positioning is completed, the damper is fixed with screws. There is a 4mm damping space between the damper and the rubber pad. The rubber damping pad 2 is a cylindrical structure with a diameter of 25mm and a thickness of 2mm, and is attached to one side of the inside of the mounting base using silicon rubber GD414.

[0024] When the device is subjected to a small amount of impact, the damper deforms in the reserved damping space to store external excitation energy, thereby playing a role in damping and impact resistance. When the device is subjected to a large amount of impact vibration, the damper deforms beyond the reserved damping space and collides with the rubber damping pad, both of which further deform to store external energy, thereby reducing the acceleration transmitted to the inertial instrument, and at the same time, the damper has a certain protective effect, thereby improving the impact resistance of the damper.

[0025] The contents not described in detail in the utility model specification belong to the prior art known to those skilled in the art.

Claims

1. An impact absorbing structure of a shock absorber, characterized by The application relates to a shock-absorbing structure of a shock absorber. The application comprises: an installation base (1) and eight shock absorbers (3) arranged on the installation base (1), recesses are arranged at the four corners of the upper surface and the lower surface of the installation base (1), one shock absorber (3) is arranged at each recess port, and a rubber shock-absorbing pad (2) is arranged at the bottom end of each recess.

2. The shock-absorbing structure of the shock absorber according to claim 1, wherein: a space of 4mm+ / -0.1mm exists between each rubber shock-absorbing pad (2) and the corresponding shock absorber (3).

3. The shock-absorbing structure of the shock absorber according to claim 1, wherein: the rubber shock-absorbing pad (2) is a cylindrical structure with a diameter of 25mm+ / -0.1mm and a thickness of 2mm+ / -0.1mm, and is pasted with the installation base by using silicon rubber GD414.

4. The shock-absorbing structure of the shock absorber according to claim 1, wherein: the shock absorbers (3) are distributed in eight-point spatial symmetry, and the distance from each shock absorber to the mass center of the installation base is the same. ​ ​ ​

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