CN113936933A

CN113936933A - Actuator signal switch trigger mechanism

Info

Publication number: CN113936933A
Application number: CN202111341763.9A
Authority: CN
Inventors: 曾华勇; 田荐宏; 闫绪骞; 汪驰
Original assignee: SICHUAN LINGFENG AVIATION HYDRAULIC MACHINERY CO Ltd
Current assignee: SICHUAN LINGFENG AVIATION HYDRAULIC MACHINERY CO Ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-01-14
Anticipated expiration: 2041-11-12
Also published as: CN113936933B

Abstract

The actuator signal switch triggering mechanism disclosed by the invention is compact and simple in structure and high in reliability. The invention is realized by the following technical scheme: a return spring is assembled on a spring seat at the tail end of the switch touch ejector rod, a push rod, a driving steel ball and a guiding steel ball are assembled in radial through holes of an end cover stand column, are assembled in grooves at two ends of the push rod and respectively contact the sliding surface of a conical necking down of the switch touch ejector rod and the outer surface of the small diameter of a piston rod. The piston rod extends out of the necking conical surface to the right to be contacted with the guide steel ball, the push rod is pushed to enable the drive steel ball to extrude the switch to touch the sliding surface of the ejector rod to enable the switch to move leftwards, the switch touches a contact trigger switch at the end part of the ejector rod, the switch is connected with an output signal, and the detection circuit sends a displacement signal synchronized by the control mechanism; the piston rod moves leftwards and retracts, the guide steel ball is separated from the necking conical surface of the piston rod, the switch touches the ejector rod to move rightwards and reset under the reset spring force, the ejector rod is separated from the switch, the signal is disconnected, the reciprocating motion is repeated in such a way, and the on-off control of the reciprocating motion direction of the actuator is realized.

Description

Actuator signal switch trigger mechanism

Technical Field

The invention relates to a trigger mechanism of an actuator signal switch, belonging to the technical field of mechanical engineering for limiting the movement limit position of mechanical equipment. The actuator with the terminal signal switch triggering mechanism is mainly used for hydraulic and pneumatic system actuating mechanisms in the industries of aviation, aerospace, ships, vehicles, large engineering equipment and the like.

Background

An Actuator (Actuator) is a common type of Actuator in a hydropneumatic transmission system, and is a key component for applying a control force to a control object according to a determined control law. The working medium generally comprises a liquid and a gas. In recent years, on the basis of conventional hydraulic actuators, pneumatic actuators and electromagnetic actuators, various intelligent actuators, such as piezoelectric ceramic actuators, piezoelectric thin film actuators, electrostrictive actuators, magnetostrictive actuators, shape memory alloy actuators, electrorheological fluid actuators, and the like, have been developed. The actuator converts hydraulic energy or air pressure energy into mechanical energy for operating the movable part, and can also be used for performing servo control through a displacement sensor or a travel switch of a product according to requirements, and the servo control is used for executing commands of a main controller and controlling the speed, the direction, the displacement, the force and the like of a load. The actuators are basically classified into two types, a reciprocating linear actuator and a reciprocating swing type actuator. The reciprocating linear actuator is widely applied to movable parts such as retraction and release of landing gears, flaps and speed reducers, adjustment of tail nozzles and air inlet cones and the like on modern airplanes. Besides external action and self-locking, the actuator is generally required to have a function of outputting a signal when a piston rod moves to a position. The actuator is typically externally fitted with a micro-switch or proximity switch which is connected to an external power source. In the switch trigger mechanism at the extending end of the actuator, a rotating shaft type trigger mechanism is generally used, and the rotating shaft is arranged in the actuator and is pushed by a piston rod to rotate so as to drive an external mechanism to trigger the switch, so that the output of a voltage signal or an induction signal is realized. The outside of the actuator is provided with a return spring, the rotating shaft is reset by the return spring after the piston rod retracts, and the switch signal is disconnected. The mechanism has the problems of complex structure, large occupied space, difficult part processing, more parts, more sealing elements, large leakage hidden danger and the like.

Disclosure of Invention

The invention aims to solve the problems in the prior art and aims to provide an actuator with a switch triggering mechanism function, which has the advantages of compact and simple structure, high reliability and good operability and has a limiting effect.

The above object of the present invention can be achieved by a trigger mechanism for an actuator signal switch, comprising: the assembly is at the variable cross section piston rod 17 of making reciprocating motion in working cylinder 1, the encapsulation is at the end cover 16 of 1 tip of working cylinder, set up in end cover 16 afterbody top, pass auricle 4, with the parallel signal switch 2 of 1 axis of working cylinder, along the stand 8 that end cover 16 radially stretches out, pass stand 8 with signal switch 2 is coaxial and the switch touch ejector pin 11 that corresponds in opposite directions, its characterized in that: a conical necking and a return spring 10 assembled on a tail end spring seat are arranged on a rod body of a switch touch ejector rod 11, a push rod 14, a driving steel ball 12 and a guiding steel ball 15 which are assembled in grooves at two ends of the push rod 14 and respectively contact the sliding surface of the conical necking and the outer surface of the small diameter of a piston rod 17 are assembled in a radial through hole 13 below the conical necking, the piston rod 17 extends rightwards and moves until the conical surface of the necking is contacted with the guiding steel ball 15, then the guiding steel ball 15 is pushed to generate upward movement thrust, the driving steel ball 12 is pushed by the push rod 14 to transmit the force to the sliding surface of the conical necking of the switch touch ejector rod 11, so that the sliding surface of the conical necking is moved leftwards, a contact touch signal switch 2 at the end part of the switch touch ejector rod 11 is driven to output a position signal of the piston rod 17, and a detection circuit sends a displacement signal synchronized by a control mechanism after the signal switch 2 is triggered and switched on; the piston rod 17 moves leftwards and retracts, the guide steel ball 15 is separated from the necking conical surface of the piston rod 17, the switch touch ejector rod 11 moves rightwards and resets under the force of the reset spring 10, and the switch is separated from the signal switch 2. The reciprocating motion is carried out in such a circulating way, and the switch control of the reciprocating motion direction of the actuator motion mechanism is realized.

Compared with the prior art, the invention has the following beneficial effects.

The invention adopts the end cover 16 encapsulated at the end part of the working cylinder barrel 1, the signal switch 2 which is arranged above the tail part of the end cover 16, passes through the lug 4 and is parallel to the axis of the working cylinder barrel 1, the upright post 8 which extends out along the radial direction of the end cover 16, the switch touch ejector rod 11 which passes through the upright post 8 and is coaxial and opposite to the signal switch 2, and the reset spring 10 which is assembled on the spring seat at the tail end. The piston rod 17 extends out, before the necking conical surface contacts the guide steel ball 15, the guide steel ball 15 contacts the small-diameter surface of the piston rod 17, the radial action of the piston rod 17 is avoided, the axial thrust along the radial through hole 13 is not generated, and the mechanism does not act; after the necking conical surface of the piston rod 17 is contacted with the guide steel ball 15, the guide steel ball 15 is pushed to generate upward moving thrust, the push rod 14 pushes the driving steel ball 12 to transmit the force to the conical necking sliding surface of the switch touch ejector rod 11, so that the conical necking sliding surface moves leftwards, the switch is driven to touch the contact touch signal switch 2 at the end part of the ejector rod 11 to output a piston rod 17 in-place signal until the guide steel ball 15 moves to the large-diameter outer surface of the piston rod 17, and the reliability is high and the operability is good.

The invention adopts a conical neck formed on a rod body of a switch touch ejector rod 11 and a return spring 10 assembled on a spring seat at the tail end, the end part of the switch touch ejector rod 11 is provided with a limit block 5, a push rod 14 is assembled in a radial through hole 13 below the conical neck, and a driving steel ball 12 and a guide steel ball 15 are assembled in a push rod groove and respectively contact the sliding surface of the conical neck and the outer surface of the small diameter of a piston rod 17, the limit of the limit block 5 ensures that a trigger mechanism is in a free state, the sliding surface of the conical neck of the switch touch ejector rod 11 is not in contact with the driving steel ball 12 to have no acting force on the push rod 14 and the guide steel ball 15, the guide steel ball 15 is only in slight contact with the outer surface of the small diameter of the piston rod 17, the surface of the piston rod 17 cannot be extruded and damaged, and the reliability is good.

According to the invention, the piston rod 17 extends rightwards to move until the necking conical surface is contacted with the guide steel ball 15, then the guide steel ball 15 is pushed to generate upward movement thrust, the push rod 14 pushes the driving steel ball 12 to transmit force to the conical necking inclined surface of the switch touch ejector rod 11, so that the force moves leftwards, the switch touch ejector rod 11 end contact touch signal switch 2 is driven to output the in-place signal of the piston rod 17, the transmission efficiency is high, the response speed is high, the movement mechanism can be prevented from falling out of the set movement range, and the safety is high. The motion stroke of the switch touching the ejector rod 11 can be adjusted by adjusting one or more of the difference between the outer diameters of the small diameter and the large diameter of the piston rod 17, the diameter of the driving steel ball 12, the diameter of the guide steel ball 15 and the sliding surface angle of the conical neck of the switch touching ejector rod 11.

All parts of the trigger mechanism are mechanically connected, no special limitation requirement exists, and the trigger mechanism can be widely applied to hydraulic, pneumatic or electric equipment with in-place signal output requirements.

Drawings

FIG. 1 is a cross-sectional view of an actuator signal switch triggering mechanism of the present invention.

Fig. 2 is a top view of fig. 1.

In the figure: the device comprises a working cylinder barrel 1, a signal switch 2, a nut 3, a lug 4, a limiting block 5, a plug cap 6, a plug cap 7, a stand column 8, an axial through hole 9, a reset spring 10, a switch 11 touch ejector rod 12, a driving steel ball 13, a radial through hole, a push rod 14, a guide steel ball 15, an end cover 16 and a piston rod 17.

The invention is further illustrated with reference to the following figures and examples, without thereby limiting the scope of the invention to the described examples. All such concepts are intended to be within the scope of the present disclosure and patent.

Detailed Description

Refer to fig. 1 and 2. In the embodiments described below, an actuator signal switch triggering mechanism includes: the assembly is at the variable cross section piston rod 17 of making reciprocating motion in working cylinder 1, the encapsulation is at the end cover 16 of 1 tip of working cylinder, set up in end cover 16 afterbody top, pass auricle 4, with the parallel signal switch 2 of 1 axis of working cylinder, along the stand 8 that end cover 16 radially stretches out, pass stand 8 with signal switch 2 is coaxial and the switch touch ejector pin 11 that corresponds in opposite directions, its characterized in that: a conical necking and a return spring 10 assembled on a tail end spring seat are arranged on a rod body of a switch touch ejector rod 11, a push rod 14, a driving steel ball 12 and a guiding steel ball 15 which are assembled in grooves at two ends of the push rod 14 and respectively contact the sliding surface of the conical necking and the outer surface of the small diameter of a piston rod 17 are assembled in a radial through hole 13 below the conical necking, the piston rod 17 extends rightwards and moves until the conical surface of the necking is contacted with the guiding steel ball 15, then the guiding steel ball 15 is pushed to generate upward movement thrust, the driving steel ball 12 is pushed by the push rod 14 to transmit the force to the sliding surface of the conical necking of the switch touch ejector rod 11, so that the sliding surface of the conical necking is moved leftwards, a contact touch signal switch 2 at the end part of the switch touch ejector rod 11 is driven to output a position signal of the piston rod 17, and a detection circuit sends a displacement signal synchronized by a control mechanism after the signal switch 2 is triggered and switched on; the piston rod 17 moves leftwards and retracts, the guide steel ball 15 is separated from the necking conical surface of the piston rod 17, the switch touch ejector rod 11 moves rightwards and resets under the force of the reset spring 10, and the switch is separated from the signal switch 2. The reciprocating motion is carried out in such a circulating way, and the switch control of the reciprocating motion direction of the actuator motion mechanism is realized.

A variable cross-section piston rod 17 which does reciprocating motion is assembled in the working cylinder barrel 1, an end cover 16 is packaged at the end part of the working cylinder barrel 1, and a signal switch 2 is fixed in a lug 4 hole above the tail part of the end cover 16 through a nut 3 and is parallel to the axis of the working cylinder barrel 1.

The vertical column 8 radially extends out of an end cover 16, a switch touch ejector rod 11 is assembled in a hole of the vertical column 8 and is coaxial and opposite to the signal switch 2, a conical necking and a return spring 10 assembled on a tail end spring seat are manufactured on a rod body of the switch touch ejector rod 11, a push rod 14, a driving steel ball 12 and a guiding steel ball 15 are assembled in grooves at two ends of the push rod 14 and respectively contact a sliding surface of the conical necking and a small-diameter outer surface of a piston rod 17, and the radial through hole 13 below the conical necking is internally provided with the push rod 14.

After the piston rod 17 extends rightward and moves until the necking conical surface is contacted with the guide steel ball 15, the guide steel ball 15 is pushed to generate upward movement thrust, the push rod 14 pushes the drive steel ball 12, the force is transmitted to the conical necking sliding surface of the switch touch ejector rod 11, the switch is driven to move leftward, the switch touches the contact touch signal switch 2 at the end part of the ejector rod 11, and the switch is switched on to output signals.

The piston rod 17 moves leftwards and retracts, the guide steel ball 15 is separated from the necking conical surface of the piston rod 17, the switch touch ejector rod 11 moves rightwards and resets under the force of the reset spring 10, the switch is separated from the signal switch 2, the signal is disconnected, the switch touch ejector rod 11 reaches the limit position and is limited by the limiting block 5, and the mechanism resets.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. Alternatives and modifications, the scope of the invention being defined by the appended claims and equivalents thereof.

Claims

1. An actuator signal switch trigger mechanism, comprising: a variable-section piston rod (17) assembled in a working cylinder (1) for reciprocating motion, an end cover (16) encapsulated at the end of the working cylinder (1) ), a signal switch (2) arranged above the tail of the end cover (16), passing through the lugs (4) and parallel to the axis of the working cylinder (1), and a column (8) extending radially along the end cover (16). ), through the column (8) and the signal switch (2) coaxial and opposite to the corresponding switch to touch the ejector rod (11), characterized in that: the switch touches the ejector rod (11) on the rod body is made of a cone A return spring (10) that is constricted and assembled on the tail end spring seat, a push rod (14) is assembled in the radial through hole (13) below the conical constriction, and a push rod (14) is assembled at both ends of the push rod (14). In the groove, the driving steel ball (12) and the guiding steel ball (15) respectively contacting the sliding surface of the conical constriction and the small diameter outer surface of the piston rod (17), the piston rod (17) extends to the right and moves to the constriction cone After the surface is in contact with the guide steel ball (15), push the guide steel ball (15) to generate upward thrust, push the driving steel ball (12) through the push rod (14), and transmit the force to the switch to touch the ejector rod (11) The conical necked sliding surface of the slack makes it move to the left, and drives the switch to touch the end contact of the ejector rod (11) to touch the signal switch (2) to output the in-position signal of the piston rod (17), and the signal switch (2) triggers the contact After the switch is turned on, the detection circuit sends out a displacement signal synchronized by the control mechanism; the piston rod (17) moves to the left and retracts, the guiding steel ball (15) is separated from the conical surface of the piston rod (17), and the switch touches the top rod ( 11) Under the force of the reset spring (10), move to the right to reset, disengage the signal switch (2), and so on and so forth, to realize the switch control of the reciprocating movement direction of the actuator movement mechanism.

2. The actuator signal switch trigger mechanism as claimed in claim 1, characterized in that: the working cylinder barrel (1) is assembled with a variable section piston rod (17) for reciprocating motion, and the end of the working cylinder barrel (1) is packaged The end cover (16) and the signal switch (2) are fixed in the hole of the ear piece (4) above the tail of the end cover (16) through the nut (3), which is parallel to the axis of the working cylinder (1).

3. The actuator signal switch trigger mechanism according to claim 1, characterized in that: the column (8) extends radially along the end cover (16), and the switch touch ejector rod (11) is assembled on the column (11). 8) and corresponding to the signal switch (2) coaxially and oppositely, the switch touches the ejector rod (11) on the rod body is made with a conical neck and a return spring (10) assembled on the end spring seat, A push rod (14) is assembled in the radial through hole (13) below the conical constriction, and a push rod (14) is assembled in the grooves at both ends of the push rod (14), respectively contacting the conical constriction sliding surface and the piston rod (17). ) The driving steel ball (12) and the guiding steel ball (15) on the outer surface of the small diameter.

4. The actuator signal switch trigger mechanism according to claim 1, characterized in that: the piston rod (17) extends to the right and moves to the right until the conical surface of the neck contacts with the guide steel ball (15), then pushes the guide steel ball (15) Generate upward thrust, push the driving steel ball (12) through the push rod (14), and transmit the force to the conical necked sliding surface of the switch touching the ejector rod (11), so that it moves to the left and drives the switch Touch the end contact of the ejector rod (11) to touch the signal switch (2), and the switch is turned on to output the signal.

5. The actuator signal switch trigger mechanism according to claim 1, characterized in that: the piston rod (17) moves and retracts to the left, and the guide steel ball (15) is separated from the constricted tapered surface of the piston rod (17). , the switch touches the ejector rod (11) and moves to the right under the force of the reset spring (10) to reset, disengages the signal switch (2), the signal is disconnected, the switch touches the ejector rod (11) to reach the limit position and is moved by the limit block ( 5) Limit, mechanism reset.