CN201327994Y

CN201327994Y - Over displacement protective switch

Info

Publication number: CN201327994Y
Application number: CNU200820199577XU
Authority: CN
Inventors: 陈晨; 谢罕杰
Original assignee: SUZHOU TESTING INSTRUMENT FACTORY
Current assignee: Suzhou Su extensive environmental reliability laboratory Co., Ltd.
Priority date: 2008-12-08
Filing date: 2008-12-08
Publication date: 2009-10-14
Anticipated expiration: 2018-12-08

Abstract

The utility model relates to an over displacement protective switch, which is characterized in that the protective switch consists of a transmission swing stem on a stage body, a first micro switch, a second micro switch and two impact blocks fixedly arranged on a moving coil. The middle of the transmission swing stem supports the stage body rotationally with a pivot perpendicular to the vibration direction of the moving coil and forms a pivot. One end of the transmission swing stem extends towards the moving coil to be a force application end and the other end serves as a pressure action end. The impact blocks are respectively arranged at the two sides of the force application end of the transmission swing stem. The first micro switch and the second micro switch are respectively arranged at the two sides of the pressure action end of the transmission swing stem. When the impact blocks contact the force application end of the transmission swing stem, the transmission swing stem swings and the pressure action end thereof presses the operation part of the first micro switch or the second micro switch so that the first micro switch and the second micro switch output an electric signal and consequently an alarm is given in time or an electric vibration table stops. The collision and the damage to the moving coil are avoided; the manufacture and maintenance cost of the electric vibration table is reduced; and at the same time, the use cost and the use risk of the electric vibration table are reduced.

Description

Cross the displacement protection switch

Technical field

The utility model relates to the electric vibration table in the dynamic environmental test equipment, is specifically related to the displacement protection switch excessively of moving-coil on the electric vibration table.This is crossed the displacement protection switch and export the signal of telecommunication automatically when electric jigging platform moving coil is crossed displacement, so that alarm or control are shut down.

Background technology

Vibration mechine is a kind of equipment that product or parts is carried out the vibration simulation test, can evaluate the anti-seismic performance of a product by such test, for examining this product quality that rational basis is provided, therefore be widely used in industries such as space flight, aviation, boats and ships, automobile, electronics, communication, household electrical appliances and instrument and meter.

Electric vibration table utilizes the electric and magnetic oscillation principle design, and its structure mainly is made up of stage body (comprising magnetic cylinder, excitation winding), several parts such as moving-coil, bearing guiding device and cooling device of having work top and a drive coil.Basic functional principle is: excitation winding feeds direct current and produces the stationary magnetic field, the moving-coil that has work top and drive coil is connected with alternating current and produces alternating magnetic field, the moving-coil that produces alternating magnetic field is arranged in the stationary magnetic field, owing to interact between alternating magnetic field and the stationary magnetic field, produce certain exciting force, promote moving-coil and vibrate back and forth according to the definite center of bearing guiding device.

When the starting of oscillation position of jigging platform moving coil not at centre bit or when surpassing the motion of rated displacement, fierce collision will take place with stage body in moving-coil, and this collision is enough to make moving-coil even test specimen to be damaged.Moving-coil is one of core component of electric vibration table, and many test specimens that is used to do vibration test all are precision instruments, in case damage, loss greatly, not to be subjected to the damage of similar collision fault be crucial so effectively protect vibration machine.

Summary of the invention

The purpose of this utility model provides a kind of displacement protection switch of crossing, the Oscillation Amplitude of monitoring moving-coil, and the output signal of telecommunication when it crosses displacement so that report to the police or electric vibration table is shut down, is not collided damage thereby effectively protect vibration machine.

For achieving the above object, the technical solution adopted in the utility model is: a kind of displacement protection switch of crossing, form by two impact blocks that set firmly on the transmission fork on the stage body, first sensitive switch, second sensitive switch and the moving-coil, described transmission fork middle part is with the pivot perpendicular to the moving-coil direction of vibration, and rotational support forms fulcrum on stage body; One end of described transmission fork extends as the force side to the moving-coil side, and the other end is as pressing the effect end; Described impact block is respectively in the both sides of transmission fork force side on the moving-coil direction of vibration; Described first sensitive switch, second sensitive switch are respectively in the both sides that press effect end of transmission fork on the direction of vibration of moving-coil, and the operating portion on first sensitive switch, second sensitive switch all is provided with towards the effect that the presses end of transmission fork; When impact block touching transmission fork force side, make the swing of transmission fork, it presses the operating portion that the effect end presses first sensitive switch or second sensitive switch, makes first sensitive switch or second sensitive switch action output signal of telecommunication.

Related content in the technique scheme is explained as follows:

1, in the such scheme, the effect that the presses end of described transmission fork is folded between the operating portion of first sensitive switch, second sensitive switch, when impact block is not touched transmission fork force side, keep the transmission fork to be in actionless state (as shown in the figure promptly perpendicular to the level of the direction of vibration of moving-coil) with the Flexible Reset of the operating portion of first sensitive switch, second sensitive switch, avoid the transmission fork that swing takes place under action of gravity own and cause false triggering, this is a preferred plan.Certainly, also can keep the actionless state of transmission fork by on the transmission fork, adding elastic components such as torsion spring.

2, in the such scheme, described two impact blocks to the distance of the force side of transmission fork is set according to the displacement of vibration machine.When vibration machine was not worked, the force side of transmission fork was sitting at the center between two impact blocks, and two impact blocks to the distance of the force side of transmission fork can design 1/2 of the rated displacement peak-to-peak value that is equal to or slightly greater than vibration machine.

3, in the such scheme, described impact block and transmission fork adopt nonmetal conductive devices, thereby save manufacturing cost.

4, in the such scheme, described sensitive switch is existing switch member, on the existing market multiple version is arranged, and the operating portion of described sensitive switch is meant pushes touching portion on the switch, and it specifically can be that flap form also can be the button form.

Because the utilization of technique scheme, this use is novel compared with prior art to have the following advantages:

1, because application of the present utility model, when the moving-coil of vibration machine is crossed displacement up or down, this protection switch all can be connected output one signal of telecommunication, thereby report to the police timely or electric vibration table is shut down, avoid taking place the accident of moving-coil damaged in collision, save the cost of electric vibration table production and maintenance, also reduced the use cost of electric vibration table simultaneously, reduced application risk;

2, the utility model simplicity of design is cheap;

3, the utility model adopts this finished parts of sensitive switch, be active in one's movements, and current-carrying part all is built in the sensitive switch, does not reveal electricity outward, avoids the generation of shock hazard, and fail safe is good.

Description of drawings

Accompanying drawing 1 is the utility model example structure schematic diagram one, and this figure represents the state of mistake displacement of moving-coil;

Accompanying drawing 2 is the utility model example structure schematic diagram two, this protection switch on-state when this figure represents that moving-coil is crossed displacement.

In the above accompanying drawing:

1, transmission fork; 2, first sensitive switch; 3, second sensitive switch; 4, impact block; 5, pivot; 6, force side; 7, press the effect end; 8, operating portion; 9, operating portion; 10, stage body; 11, moving-coil; 12, pedestal.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment: shown in accompanying drawing 1, accompanying drawing 2, a kind of displacement protection switch of crossing is made up of two impact blocks 4 that set firmly on the transmission fork on the stage body 10 1, first sensitive switch 2, second sensitive switch 3 and the moving-coil 11; Concrete transmission fork 1, first sensitive switch 2, second sensitive switch 3 are arranged on the pedestal 12, and pedestal 12 is fixed on the magnetic cylinder ring upper surface of stage body again.

Described transmission fork 1 middle part is with the pivot 5 perpendicular to moving-coil 11 direction of vibration, and rotational support goes up in pedestal 12 (being stage body 10) and forms fulcrum; One end of described transmission fork 1 extends as force side 6 to moving-coil 11 sides, and the other end is as pressing effect end 7; Described impact block 4 is respectively in the both sides of transmission fork force side 6 on moving-coil 11 direction of vibration (being illustrated as vertical direction up and down); Described first sensitive switch 2, second sensitive switch 3 are respectively in the both sides that press effect end (7) of transmission fork on the direction of vibration (being illustrated as vertical direction up and down) of moving-coil 11, and the

operating portion

8,9 on first sensitive switch 2, second sensitive switch 3 all towards and be against the pressing on the effect end 7 of transmission fork, promptly the

operating portion

8,9 of first sensitive switch 2, second sensitive switch 3 is clamped the effect that the presses end 7 of transmission fork, has Flexible Reset with its

operating portion

8,9 and remains on level transfixion state as shown in Figure 1.Described two impact blocks 4 to the distance of the force side 6 of transmission fork is set according to the displacement of vibration machine, when moving-coil 11 vibrated displacement, as shown in Figure 2, impact block 4 touching transmission fork force sides 6, promptly equal the application of force on transmission fork force side 6, make 1 swing of transmission fork, it presses the operating portion that effect end 7 presses first sensitive switch 2 (or second sensitive switch 3), makes the signal of telecommunication of first sensitive switch 2 (or second sensitive switch 3) action output break-make.

During described wiring; normally opened contact in available first sensitive switch 2 and second sensitive switch 3; also can adopt the normally-closed contact in first sensitive switch 2 and second sensitive switch 3; its circuit taking alarm is reported to the police to the warning circuit input signal, thereby the power amplifier that inserts electric vibration table is simultaneously shut down to power amplifier input signal rupturing duty amplifier output control.

The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection range of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection range of the present utility model.

Claims

1, a kind of displacement protection switch of crossing, it is characterized in that: form by two impact blocks (4) that set firmly on the transmission fork (1) on the stage body (10), first sensitive switch (2), second sensitive switch (3) and the moving-coil (11), described transmission fork (1) middle part is with the pivot (5) perpendicular to moving-coil (11) direction of vibration, and rotational support forms fulcrum on stage body; One end of described transmission fork (1) extends as force side (6) to moving-coil (11) side, and the other end is as pressing effect end (7); Described impact block (4) is respectively in the both sides of transmission fork force side (6) on moving-coil (11) direction of vibration; Described first sensitive switch (2), second sensitive switch (3) are respectively in the both sides that press effect end (7) of transmission fork on the direction of vibration of moving-coil (11), and the operating portion (8,9) on first sensitive switch (2), second sensitive switch (3) all presses effect end (7) setting towards the transmission fork; When impact block (4) touching transmission fork force side (6), make transmission fork (1) swing, it presses the operating portion that effect end (7) presses first sensitive switch (2) or second sensitive switch (3), makes first sensitive switch (2) or second sensitive switch (3) the action output signal of telecommunication.

2, the displacement protection switch of crossing according to claim 1; it is characterized in that: the effect end (7) that presses of described transmission fork is folded between the operating portion (8,9) of first sensitive switch (2), second sensitive switch (3); when impact block (4) is not touched transmission fork force side (6), keep transmission fork (1) to be in actionless state with the Flexible Reset of the operating portion (8,9) of first sensitive switch (2), second sensitive switch (3).