CN103824719A

CN103824719A - Microswitch trigger apparatus

Info

Publication number: CN103824719A
Application number: CN201210464094.9A
Authority: CN
Inventors: 王庆立; 季茂龄; 王永和; 宋宪龙; 宋彦南; 徐继红; 刘双
Original assignee: Harbin Aircraft Industry Group Co Ltd
Current assignee: Harbin Aircraft Industry Group Co Ltd
Priority date: 2012-11-16
Filing date: 2012-11-16
Publication date: 2014-05-28
Anticipated expiration: 2032-11-16
Also published as: CN103824719B

Abstract

The invention belongs to the technical field of microswitch application, and relates to a microswitch trigger apparatus which has special microswitch protection effects. The apparatus comprises a housing (1), a microswitch (2), a rocking arm (3), a shaft (4), a pin (5), a push rod (6), a clasp (7), a guide sleeve (8), a dustproof loop (9), a pin (10), a roller (11), a guide shaft (12), a spring (13), a nut (14), a gasket (15), a self lubricating lining (16), a gasket (17) and a jump ring (18). According to the invention, the motion of a detected motion mechanism is converted to motion with only positive pressure applied to a microswitch lower contact by use of the spring, the rocking arm, the push rod and the like in a shell, the positive pressure is supplied by the spring, there is no possibility of damaging the microswitch due to too much pressure, and at the same time, a housing installation position can be adjusted through a waist-shaped hole in the housing to enable the roller to be contacted with the detected mechanism at a proper position.

Description

A kind of microswitch trigger device

Technical field

The invention belongs to sensitive switch applied technical field, relate to a kind of microswitch trigger device, particularly there is the effect of protection sensitive switch.

Background technology

Sensitive switch is a kind of quick converting switch of exerting pressure and actuating, because the contact spacing of its switch is smaller, therefore named sensitive switch, is again sensitive switch.Outer mechanical force is used for moving reed by actuated element (push-piece, button, lever, roller etc.) by masterpiece, in the time that action reed is displaced to critical point, produces instantaneous operation, makes to move moving contact and fixed contact quick-make or the disconnection of reed end.After the active force on actuated element is removed, action reed produces counteragent power, when actuated element reverse stroke reaches after the action critical point of reed, and the instantaneous counteragent that completes.The contact spacing of sensitive switch is little, actuating length is short, press that power is little, break-make is rapid.The responsiveness of its moving contact and actuated element responsiveness are irrelevant.

The invention belongs to sensitive switch applied technical field, relate to a kind of microswitch trigger device, particularly there is the effect of protection sensitive switch.At present, common sensitive switch work mainly directly acts on sensitive switch lower contact by transmission mechanism (cam, push rod etc.), transmits displacement variation, is converted to the signal of telecommunication.This working method is simply direct, but sensitive switch is subject to Moment, fragile, and when while transmission mechanism occurs that the force and moment of the displacement larger situation of variation and transmission is larger, sensitive switch is directly fail in compression easily, causes greater loss.

Summary of the invention

The technical problem to be solved in the present invention:

The object of the invention is to overcome the flimsy shortcoming of existing sensitive switch; provide one to there is protection sensitive switch; extend sensitive switch useful life; reduce the trigger equipment of failure rate; it can be converted to the motion of tested motion displacement variable accurately, only has the normal pressure and the power that act on sensitive switch lower contact to be worth minimum motion; make sensitive switch in guaranteeing sensitivity, can not be subject to exceeding again the power of rated load, can protect sensitive switch, reduce rate of breakdown.

Technical scheme of the present invention:

A trigger equipment for sensitive switch, this device comprises shell 1, sensitive switch 2, rocking arm 3, axle 4, bearing pin 5, push rod 6, snap ring 7, fairlead 8, dust ring 9, bearing pin 10, roller 11, the axis of guide 12, spring 13, nut 14, packing ring 15, self-lubricating bushing 16, packing ring 17 and jump ring 18; Wherein, sensitive switch 2, the axis of guide 12 and axle 4 are directly installed on shell 1, fairlead 8 is arranged on shell 1 by nut 14 and packing ring 15, dust ring 9 is glued on fairlead 8, roller 11 is connected with push rod 6 by bearing pin 10, push rod 6 is connected with rocking arm 3 with bearing pin 5 by the endoporus of fairlead 8; rocking arm 3 is arranged on axle 4 by self-lubricating bushing 16, packing ring 17 and jump ring 18; spring 13 is enclosed within on the axis of guide 12; spring 13 other ends withstand on rocking arm 3, promotes rocking arm 3 and withstands on sensitive switch 2 lower contacts.

This device also has on the draw-in groove that snap ring 7 is stuck in push rod 6.

Beneficial effect of the present invention:

The present invention is by the spring in housing, the structure such as rocking arm and push rod is converted to the motion of tested motion only to have the motion that acts on the normal pressure on sensitive switch lower contact, and normal pressure is to be provided by spring, do not have pressure to cross the possibility that ambassador's sensitive switch damages, can regulate shell installation site that roller is contacted with tested mechanism in place by the mounting hole on shell simultaneously, keep between snap ring and fairlead distance and sensitive switch is installed by clearance gauge, to guarantee the sensitivity of sensitive switch, the novel power that makes sensitive switch can not be subject to exceeding again rated load in guaranteeing sensitivity that reached of this use, can protect sensitive switch, reduce rate of breakdown, overcome the shortcoming of common application form.

Accompanying drawing explanation

Fig. 1 is microswitch trigger device schematic diagram;

Fig. 2 is push rod and fairlead cutaway view;

Fig. 3 is spring and axis of guide cutaway view;

Fig. 4 is rocking arm and housing connecting portion cutaway view;

In above-mentioned figure: 1. shell, 2. sensitive switch, 3. rocking arm, 4. axle, 5. bearing pin, 6. push rod, 7. snap ring, 8. fairlead, 9. dust ring, 10. bearing pin, 11. rollers, 12. axis of guides, 13. springs, 14. nuts, 15. packing rings, 16. self-lubricating bushings, 17. packing rings, 18. jump rings.

Embodiment

A trigger equipment for sensitive switch, this device comprises shell 1, sensitive switch 2, rocking arm 3, axle 4, bearing pin 5, push rod 6, snap ring 7, fairlead 8, dust ring 9, bearing pin 10, roller 11, the axis of guide 12, spring 13, nut 14, packing ring 15, self-lubricating bushing 16, packing ring 17 and jump ring 18, wherein, sensitive switch 2, the axis of guide 12 and axle 4 are directly installed on shell 1, the axis of guide 12 is for restraining spring 13 direction of action, fairlead 8 is arranged on shell 1 by nut 14 and packing ring 15, fairlead 8 is to make with self-lubricating materials such as engineering duroplasts, for the motion guide of push rod 6 and reduce the frictional force that motion produces, dust ring 9 is glued on fairlead 8, dust ring 9 is for preventing that the foreign matters such as dust from entering shell 1 and affecting the function of this device, roller 11 is connected with push rod 6 by bearing pin 10, roller 11 is for directly contacting with tested mechanism, in the time of tested mechanism kinematic, roller 11 can effectively reduce the frictional force of this motion, reduce friction loss, push rod 6 is connected with rocking arm 3 with bearing pin 5 by the endoporus of fairlead 8, rocking arm 3 is by self-lubricating bushing 16, packing ring 17 and jump ring 18 are arranged on axle 4, self-lubricating bushing 16 is to make with self-lubricating materials such as polytetrafluoroethylene, can effectively reduce rocking arm 3 at the frictional resistance in the time that axle 4 rotates, improve the sensitivity of this device, spring 13 is enclosed within on the axis of guide 12, spring 13 other ends withstand on rocking arm 3, promote rocking arm 3 and withstand on sensitive switch 2 lower contacts.

This device also has on the draw-in groove that snap ring 7 is stuck in push rod 6, and the displacement moving downward for limiting push rod 6 has limited rocking arm 3 and compress the displacement of sensitive switch 2, reaches the object of protection sensitive switch 2.

Below the present invention is described in further details.For example: 0.7mm clearance gauge is filled between snap ring 7 and fairlead 8, sensitive switch 2 is installed, the lower contact of sensitive switch 2 is contacted with rocking arm; By adjusting clearance gauge testing jiggle switch transition position, keep this position, and this trigger equipment is installed, make roller 11 and tested mechanism (cam) basis, cam rotates away from roller 11, and push rod 6 is discharged, spring 13 promotes rocking arm 3 and clockwise rotates, push rod 6 is moved downward along fairlead 8 endoporus, and rocking arm 3 contacts sensitive switch 2 parts and is subject to spring 13 pressure-acting compression sensitive switches to obtain the signal of telecommunication, identifies the state of the mechanism that now connects cam.Fairlead 8 and self-lubricating bushing 16 coefficient of frictions are very little, so this device internal friction power is less, do not affect the sensitivity of sensitive switch; Sensitive switch 2 is only subject to positive pressure; the force value upper limit determines by spring 13, and snap ring 7 limits the displacement of push rod 6 simultaneously, is equal to restriction rocking arm 3 and compresses the displacement of sensitive switch 2; make rocking arm 3 can not cause brokenly ring to sensitive switch 2, play the effect of protection sensitive switch.

Claims

1. the trigger equipment of a sensitive switch, it is characterized in that, this device comprises shell (1), sensitive switch (2), rocking arm (3), axle (4), bearing pin (5), push rod (6), snap ring (7), fairlead (8), dust ring (9), bearing pin (10), roller (11), the axis of guide (12), spring (13), nut (14), packing ring (15), self-lubricating bushing (16), packing ring (17) and jump ring (18), wherein, sensitive switch (2), the axis of guide (12) and axle (4) are directly installed on shell (1), fairlead (8) is arranged on shell (1) by nut (14) and packing ring (15), dust ring (9) is glued on fairlead (8), roller (11) is connected with push rod (6) by bearing pin (10), push rod (6) is connected with rocking arm (3) with bearing pin (5) by the endoporus of fairlead (8), rocking arm (3) is by self-lubricating bushing (16), packing ring (17) and jump ring (18) are arranged on axle (4), spring (13) is enclosed within on the axis of guide (12), spring (13) other end withstands on rocking arm (3), promote rocking arm (3) and withstand on sensitive switch (2) lower contact.

2. the trigger equipment of a kind of sensitive switch as claimed in claim 1, is characterized in that, this device also has snap ring (7) and is stuck on the draw-in groove of push rod (6).