CN201812749U - A vibration damping device with lug relay installed - Google Patents

Abstract

The utility model relates to a damping device with a lug-mounted relay, which comprises a relay pedestal, a first metal insert, a first rubber pad, relay lugs, a second rubber pad, a second metal insert, a plain washer, a spring washer, a nut and a bolt, wherein the rubber pads are made of viscoelastic damping material silicon rubber; and the metal inserts are made of stainless steel. The cross section of the bulge of each rubber pad is matched with the mounting hole in the relay lug in shape and size so as to ensure the stable damping efficacy of the damping device in three directions. When in use, the user needs to consider the influence of static and dynamic added spaces after additionally mounting the damping device, thereby ensuring the safety requirement, and also needs to ensure that the efficacy of the damping device is free from the influences of electric fitting and sealing. The utility model has the advantages of simple structure, easy application and obvious damping effect, has obvious actions on high frequency damping and inhibition for the amplification of integral vibration energy, and can ensure normal operation of the relay in a severe mechanical environment.

Description

A vibration damping device with lug relay installed

technical field

The utility model relates to a vibration damping device, in particular to a vibration damping device with lug relays installed, which can be used as a vibration damping device for electronic products and components in industries with harsh mechanical environments such as aerospace.

Background technique

As a switch control device for switching on and off the load in the product, the relay is an acceleration sensitive component. In a strong random vibration environment, especially under the action of broadband load multi-formant vibration loads such as spacecraft electronic equipment, the relay may be in an abnormal working state, and the contact system of the relay will vibrate periodically. In severe cases, there will be a drop in contact pressure, instantaneous open circuit, contact vibration, and damage to the relay structure.

At present, the vibration reduction methods when relays are used in electronic equipment mainly include improving the rigidity of equipment level and printed board assembly level, adjusting the layout of components on printed boards, adopting measures of solid sealing or potting of components, and adopting equipment level and printed circuit board components. There are several methods such as printed board component level damping structure and so on. Among them, although the first two types of methods can reduce the mechanical response value of components to a certain extent, it is difficult to make the natural frequency of the structure avoid the broadband excitation frequency range, which cannot be achieved for electronic components with mechanical structures such as relays. Effective vibration control purpose; the method of solid sealing or potting of components cannot change the boundary conditions of the relay with installed lugs, so it cannot achieve the effect of vibration reduction; the method of damping and vibration reduction structure at the equipment level and printed board component level The disadvantage is that in order to achieve the purpose of vibration reduction of individual components, the whole structure of the equipment needs to be changed, which is costly, and will affect the heat conduction and heat dissipation performance and installation characteristics of the equipment, and the structure is generally more complicated. At the same time, external shock absorption is installed The equipment of the device needs a large free space during the vibration process to avoid collisions. It is especially not suitable for aerospace and other products with narrow internal geometric space and compact equipment installation. It can be seen that the simple and efficient external shock absorption is lost. The shock absorption method of the electronic equipment component level has become very difficult, and new solutions need to be explored.

Utility model content

The technical solution of the utility model is to overcome the deficiencies of the prior art and provide a vibration damping device with lug relays. The device is a relay vibration damping device with simple structure, easy application and remarkable vibration damping effect. The device can ensure the normal operation of the relay in the harsh mechanical environment.

The technical solution of the utility model is:

A shock absorber for a relay with mounting tabs, comprising a base, a first metal insert, a first rubber pad, a relay tab, a second rubber pad, a second metal insert, a flat washer, a spring washer, a nut and bolt;

There is an inverted T hole on the base, the bolt shaft of the bolt passes through the inverted T hole of the base from bottom to top, and the bolt cap is stuck in the inverted T hole of the base; the bottom of the first metal insert is disc-shaped , there is also a cylinder in the center of the bottom disc and the disc and the cylinder are integrated, a through hole is punched in the center of the cylinder and the disc, the first metal insert is set on the bolt rod of the bolt in an inverted T, and the first metal insert The lower surface is in contact with the upper surface of the base; the bottom of the first rubber pad is a cylinder, and there is a raised cylinder in the center of the bottom cylinder, and the cylinder and the bottom cylinder are integrated, and the first rubber pad is punched with a through hole. It is placed on the raised part of the first metal insert in an inverted T shape. The shape and size of the raised part of the first rubber pad are the same as the shape and size of the mounting hole on the relay lug. The relay lug passes through the mounting hole Set on the raised cylinder of the first rubber pad; the second rubber pad is a cylinder with a through hole, the shape and size of the through hole are the same as the shape and size of the mounting hole of the relay lug, the second rubber pad cover On the raised part of the first rubber pad, and the lower surface of the second rubber pad is in contact with the upper surface of the relay tab; the upper surface of the second rubber pad, the upper surface of the first rubber pad and the first metal insert The upper surface forms a ring-shaped plane, and a second metal insert is placed on this ring-shaped plane. The second metal insert is a disc-shaped object with a through hole, which is set on the bolt shaft of the bolt; the flat washer Sleeved on the bolt shank of the bolt and located above the second metal insert; the spring washer is sleeved on the bolt shank of the bolt and located above the flat washer; the upper part of the spring washer is fixed by the nut.

The first rubber pad and the second rubber pad are made of viscoelastic damping material.

The viscoelastic damping material is silicone rubber.

The beneficial effects of the utility model compared with the prior art are:

(1) The relay damping device of the utility model achieves the purpose of remarkable three-way damping effect through the structural design matched with the relay, so that the random vibration response curve of the relay in the product is moved backward as a whole, and the peak value of the power spectrum density is reduced. High-frequency vibration reduction and suppression of overall vibration energy amplification have a significant effect, which can effectively improve the reliability and vibration resistance of electronic products.

(2) The vibration damping device of the utility model adopts the rubber pad of viscoelastic damping material silicon rubber to give full play to the damping and energy-absorbing characteristics of the viscoelastic material, and the elastic solid deforms under the action of external force to generate potential energy without consuming Dissipate energy, the viscous fluid undergoes irreversible viscous flow under the action of external force to generate heat energy and dissipate energy. Therefore, when the relay is subjected to external force, the shock absorber can store energy and dissipate energy under the reciprocating action of the force. The function of damping and shock absorption.

(3) The shock absorbing device of the utility model acts directly on the relay. This method is highly targeted and does not require electronic equipment to be modified at the whole machine level because of the design of shock absorbing equipment, which is convenient for maintenance and local structural improvement, and can greatly save The cost of product redesign, demonstration, processing and testing, etc.; it will not make the whole electronic equipment need a large free space because of the installation of external shock absorbers to avoid collisions, especially suitable for aerospace and other fields Products with narrow internal geometric space and compact equipment installation provide an effective method of component-level shock absorption for electronic equipment that cannot be installed with external shock absorbers; the shock absorber installed inside the device is not like the installation of external shock absorbers with equipment The installation surface will not affect the heat conduction and heat dissipation performance of the equipment and the installation characteristics, and the structure is simple and easy to apply.

Description of drawings

Fig. 1 is a schematic diagram of the damping structure of the utility model.

Detailed ways

As a switch control device for switching on and off the load in the product, the relay is an acceleration sensitive component and a widely used electronic device. In a strong random vibration environment, especially under the action of broadband load multi-formant vibration loads such as spacecraft electronic equipment, the vibration may cause the relay to be in an abnormal working state, and the contact system of the relay will vibrate periodically , In severe cases, there will be contact pressure reduction, instantaneous open circuit, contact vibration, relay structure damage and other phenomena. Therefore, solving the shock absorption of relays, especially the shock absorption of relays in spacecraft electronics, has become an important issue.

The utility model proposes a vibration damping device with lug relays, which can be used as a vibration damping device for electronic products and components in industries with harsh mechanical environments such as aerospace. It has a very good damping effect and has a prospect of popularization .

Below in conjunction with Fig. 1, introduce a kind of damping device of the utility model with the lug relay installed.

As shown in Figure 1, the utility model includes a base 1, a first metal insert 2, a first rubber pad 3, a relay lug 4, a second rubber pad 5, a second metal insert 6, a flat washer 7, a spring Washer 8, nut 9 and bolt 10.

There is an inverted T-shaped hole on the base 1, which is similar to a ⊥-shaped hole. The bolt rod of the bolt 10 passes through the inverted T-shaped hole of the base 1 from bottom to top, and the bolt cap of the bolt 10 is stuck on the inverted T of the base 1. In the hole; the bottom of the first metal insert 2 is disc-shaped, and there is a cylinder in the center of the bottom disc and the disc and the cylinder are integrated, and a through hole is punched in the center of the cylinder and the disc. The first metal insert 2 The bottom surface of the first metal insert 2 is in contact with the upper surface of the base 1; the bottom of the first rubber pad 3 is a cylinder, and there is a protrusion in the center of the bottom cylinder The cylinder and the cylinder at the bottom are integrated, the first rubber pad 3 has a through hole, and is placed on the raised part of the first metal insert 2 in an inverted T shape, and the raised part of the first rubber pad 3 The shape and size of the outer profile are the same as the shape and size of the mounting hole on the relay lug 4, and the relay lug 4 is sleeved on the raised cylinder of the first rubber pad 3 through the mounting hole; the second rubber pad 5 is a The cylinder of the through hole, the shape and size of the through hole are the same as the shape and size of the mounting hole of the relay lug 4, the second rubber pad 5 is sleeved on the raised part of the first rubber pad 3, and the second rubber pad 5 The lower surface is in contact with the upper surface of the relay lug 4; the upper surface of the second rubber pad 5, the upper surface of the first rubber pad 3 and the upper surface of the first metal insert 2 form a circular plane, in this circle A second metal insert 6 is placed on the annular plane, and the second metal insert 6 is a disc-shaped object with a through hole, which is set on the bolt shank of the bolt 10; the flat washer 7 is set on the bolt shank of the bolt 10 , located above the second metal insert 6; the spring washer 8 is set on the bolt shaft of the bolt 10, located above the flat washer 7; the top of the spring washer 8 is fixed by the nut 9

The relay installation base 1 provides installation space for the relay and the vibration damping device. The three-way first-order resonance frequency is greater than 200Hz, which can fully exert the performance of the vibration damping device; the mounting hole of the relay lug 4 is an oval shape of 4.4mm×3.8mm. The shape of the mounting hole will be different according to different relay models, but it does not matter, as long as the outer shape and size of the raised cylinder part of the first rubber pad 3 are the same as the mounting hole, and the through hole of the second rubber pad 5 The shape and size are also the same as the mounting holes.

The profile of the cross section of the raised cylinder part of the first rubber pad 3 is consistent with the shape of the installation hole of the relay 4, and the inner profile is consistent with the profile of the section of the raised part of the first metal insert 2, so that the first metal insert 2 penetrates therein; The annular cross-sectional inner contour of the second rubber pad 5 is consistent with the raised cylinder outer contour of the first rubber pad 3, so that it is well wrapped outside the raised cylinder of the first rubber pad 3; the first metal insert 2 and The diameter of the cylindrical through hole of the second metal insert 6 is 2.2mm, and the outer diameter of the first metal insert 2 is 2.8mm, which is used to install the bolt 10 whose specification is M2; the thickness of the second rubber pad is 2.5mm, and the relay tab 4 The thickness is 1mm, the thickness of the raised part of the first rubber pad 3 is the sum of the thickness of the second rubber pad 5 and the thickness of the relay lug 4, which is 3.5mm; the thickness of the base of the first rubber pad 3 is 2.5mm, and the thickness of the first metal insert The height of the cylinder of the convex part of the piece 2 is the overall height of the first rubber pad 3, which is 6mm, and the thickness of the second metal insert 6 is 2mm.

The assembly position relationship of this vibration damping device is that the first rubber pad 3 is located under the relay lug, and the section of the raised part of the first rubber pad 3 matches the shape of the mounting hole of the relay lug 4 to ensure the three-way damping of the shock absorber. The stability of the vibration performance; the second rubber pad 5 is located above the relay lug 4, and wraps the raised part of the first rubber pad 3; the first metal insert 2 runs through the first rubber pad 3, and the first metal insert 2 The upper surface of the base is in contact with the lower surface of the base of the first rubber pad 3; the second metal insert 6 is placed on the upper surface of the second rubber pad 5, and the centers of the two coincide; each mounting hole is equipped with a relay lug of the vibration damping device. The piece 4 is placed on the relay installation base 1, and the lower surface of the base of the first metal insert 2 is in contact with the relay installation base 1; the bolt rod of the bolt 10 passes through the relay installation base 1, the first metal insert 2 in turn , the second metal insert 6, the flat washer 7, the spring washer 8 and the nut 9, and the bolt cap of the bolt 10 is stuck in the inverted T-shaped hole of the base 1. The specification of the bolt 10 is selected according to the size of the mounting hole of the relay lug 4 and the vibration damping device.

The first rubber pad 3 and the second rubber pad 5 are made of viscoelastic damping material silicone rubber, and the first metal insert 2 and the second metal insert 6 are made of stainless steel to prevent rust. Polymer silicone rubber has both elastic solid properties and viscous fluid properties. Under the reciprocating action of force, it can both store energy and dissipate energy, and play the role of damping and vibration reduction.

The vibration damping device of the utility model has realized the engineering application in aerospace products, verified the feasibility and effectiveness of various engineering links such as structural design, material selection, safe space design, electrical installation and solid sealing, and can be popularized The research and application of vibration damping devices for electronic products in industries with harsh mechanical environments such as aviation, compared with the prior art, the utility model has a far better damping effect on electronic components such as relays than the prior art, and after It has verified the practical engineering application and has a good promotion prospect.

Claims (3)

1. A vibration damping device with installed lug relays, characterized in that it includes a base (1), a first metal insert (2), a first rubber pad (3), a relay lug (4), a second Two rubber pads (5), second metal inserts (6), flat washers (7), spring washers (8), nuts (9) and bolts (10); There is an inverted T-shaped hole on the base (1), the bolt shank of the bolt (10) passes through the inverted T hole of the base (1) from bottom to top, and the bolt cap of the bolt (10) is stuck on the bottom of the base (1). Inverted T hole; the bottom of the first metal insert (2) is disc-shaped, and there is a cylinder in the center of the bottom disc and the disc and the cylinder are integrated, the center of the cylinder and the disc is punched with a through hole, and the first metal The insert (2) is placed on the bolt shank of the bolt (10) in an inverted T, the lower surface of the first metal insert (2) is in contact with the upper surface of the base (1); the bottom of the first rubber pad (3) It is a cylinder, and there is a raised cylinder in the center of the bottom cylinder, and the cylinder is integrated with the bottom cylinder. The first rubber pad (3) is punched with a through hole, which is placed on the first metal insert (2) in an inverted T. On the raised part of the first rubber pad (3), the shape and size of the raised part of the first rubber pad (3) are the same as the shape and size of the mounting hole on the relay lug (4), and the relay lug (4) passes through the mounting hole sleeve On the raised cylinder of the first rubber pad (3); the second rubber pad (5) is a cylinder with a through hole, the shape and size of the through hole are the same as the shape and size of the mounting hole of the relay tab (4) The same size, the second rubber pad (5) is set on the raised part of the first rubber pad (3), and the lower surface of the second rubber pad (5) is in contact with the upper surface of the relay lug (4); the second The upper surface of the rubber pad (5), the upper surface of the first rubber pad (3) and the upper surface of the first metal insert (2) form a ring-shaped plane, and the second metal insert is placed on this ring-shaped plane. The insert (6), the second metal insert (6) is a disc-shaped object with a through hole, which is sleeved on the bolt shaft of the bolt (10); the flat washer (7) is sleeved on the bolt shaft of the bolt (10) on the top of the second metal insert (6); the spring washer (8) is set on the bolt shank of the bolt (10), above the flat washer (7); the top of the spring washer (8) is covered by the nut (9) fixed. 2. A vibration damping device with lug relays according to claim 1, characterized in that: the first rubber pad (3) and the second rubber pad (5) are made of viscoelastic damping and vibration damping materials become. 3 . The damping device for a relay with mounting lugs according to claim 2 , wherein the viscoelastic damping and damping material is silicon rubber. 4 .