Zero position detection and linear displacement testing device of linear actuator

Abstract

The application discloses a zero position detection and linear displacement testing device of a linear steering engine, which comprises a base, a zero position correction mechanism and a linear displacement detection mechanism; the zero position correction mechanism comprises a mounting bracket and a fixing seat fixed on the base and a positioning pin hole arranged on the base, the linear steering engine is connected between the mounting bracket and the fixing seat and the accurate zero position is determined through the positioning pin hole; the linear displacement detection mechanism comprises a mounting seat fixed on the base and a fixing bracket movably connected to the base, a scale shaft is slidably arranged in the fixing bracket, the linear steering engine is connected between the mounting seat and the scale shaft and the corresponding moving distance value of the linear steering engine is directly read through the movement of the scale shaft. The application can detect the consistency of the zero position of the linear steering engine and the design requirement by adjusting the different positions of the mounting seat and the mounting bracket on the base; the linear displacement structure of the linear steering engine is simple and the operation is convenient by the scale value corresponding to the movement of the scale shaft in the fixing bracket.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of rudder control, and particularly relates to a zero position detection and linear displacement testing device of a linear rudder. BACKGROUND

[0002] The linear rudder generates axial displacement (extension and contraction) following a control command, and deflects a rudder surface following a rudder control signal, and is an actuating mechanism for ensuring stable flight of an aircraft. The axial displacement distance directly affects the deflection angle of the rudder surface, and therefore the zero position and linear displacement of the linear rudder need to be measured.

[0003] At present, there is no device for measuring the zero position and linear displacement of the linear rudder, and how to provide a simple and convenient testing device is a problem that needs to be solved by those skilled in the art. SUMMARY

[0004] The application provides a zero position detection and linear displacement testing device of a linear rudder, and provides a testing device with simple structure, convenient operation, and zero position detection and linear displacement detection functions of the linear rudder.

[0005] To achieve the above-mentioned purpose, the application adopts the following technical scheme:

[0006] A zero position detection and linear displacement testing device of a linear rudder, comprising a base, two groups of guide plates fixedly installed on the base, a zero position correction mechanism and a linear displacement detection mechanism respectively installed on the two groups of guide plates;

[0007] The zero position correction mechanism comprises a mounting bracket and a fixed seat fixedly connected with the base, and a positioning pin hole provided on the base and the guide plate, and the fixed seat is provided with a positioning pin, one end of the linear rudder is connected and fixed with the mounting bracket through the positioning pin, the other end is connected with the fixed seat through the positioning pin, and the accurate zero position is determined through the positioning pin hole;

[0008] The linear displacement detection mechanism comprises a mounting seat fixedly connected with the base, and a fixed bracket movably connected with the base, and a scale shaft slidably installed in the fixed bracket, one end of the linear rudder is connected and fixed with the mounting seat through the positioning pin, the other end is connected with the scale shaft through the connecting block, and the corresponding moving distance value of the linear rudder is directly read through the movement of the scale shaft.

[0009] As a preferred embodiment of the above-mentioned scheme, one side of the base is provided with a group of mounting screw holes and pin holes for fixing and positioning of the mounting bracket and the fixed seat; one end of the other side is provided with a group of screw holes for fixing of the mounting seat, and the other end is provided with a long waist-shaped hole for connection with the fixed bracket; the base is further provided with two groups of screw holes for fixing of the guide plates.

[0010] As the preferred of the above scheme, the bottom surface of the mounting bracket, the fixing seat, the mounting seat and the fixing bracket is provided with a through hole for fixing with the base, and the bottom of the mounting bracket, the fixing seat and the mounting seat is further provided with a pin hole matched with the pin hole on the base.

[0011] As the preferred of the above scheme, the base is provided with a scale line for use when the zero size of the linear actuator is changed.

[0012] As the preferred of the above scheme, the guide plate is provided with a boss, and the bottom of the mounting seat, the mounting bracket, the fixing seat and the fixing bracket is provided with a groove matched with the guide plate.

[0013] As the preferred of the above scheme, the top of the fixing seat is provided with a pin hole matched with the positioning pin, and the fixing seat is connected and fixed with the linear actuator through the threaded hole and the pin hole on the linear actuator.

[0014] As the preferred of the above scheme, the upper end surface of the fixing bracket is provided with a through hole for mounting the scale line shaft.

[0015] As the preferred of the above scheme, the fixing bracket is mounted with a set screw, and the outer circle of the scale line shaft is provided with a milled flat part, and the set screw is fixed on the milled flat part.

[0016] As the preferred of the above scheme, the scale line shaft is marked with a scale and a linear displacement mark, the scale is a symmetric moving distance value, the scale line shaft is connected with a connecting block through a square hole, and the connecting block is connected with the linear actuator through a special screw.

[0017] Due to the above structure, the application has the following advantages:

[0018] (1) The linear actuator is fixed through the mounting bracket, the positioning pin and the fixing seat, and the zero position of the linear actuator is detected through the positioning pin hole on the base, so that the detection accuracy is high; the consistency of the zero position of the linear actuator with the design requirement can be detected by adjusting the different positions of the mounting seat and the mounting bracket on the base; and the size range of the linear actuator zero position detection is expanded through the group of mounting holes on the base.

[0019] (2) The linear displacement of the linear actuator can be detected through the scale line value corresponding to the movement of the scale line shaft in the fixing bracket; and the linear displacement of the linear actuator with different zero positions can be detected through the waist-shaped hole on the base.

[0020] (3) The application has the characteristics of simple structure and convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the base of the present invention;

[0024] Figure 3 for Figure 2 Enlarged view of point I in the image;

[0025] Figure 4 This is a schematic diagram of the connecting block of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the fixing bracket of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the engraving shaft of the present invention;

[0028] In the diagram: 1-Mounting base, 2-Guide plate, 3-Mounting bracket, 4-Linear servo, 5-Base, 6-Positioning pin, 7-Fixed base, 8-Set screw, 9-Fixed bracket, 10-Scale spool, 11-Special screw, 12-Connecting block, 13-Connecting pin, 14-Special nut. Detailed Implementation

[0029] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] like Figures 1 to 6 As shown, this embodiment provides a zero-position detection and linear displacement testing device for a linear servo 4, including a base 5, two sets of guide plates 2 fixedly installed on the base 5, a zero-position correction mechanism and a linear displacement detection mechanism respectively installed on the two sets of guide plates 2;

[0031] The zero-position correction mechanism includes a mounting bracket 3 and a fixed base 7 fixedly connected to the base 5, and a positioning pin hole provided on the base 5 and the guide plate 2. The fixed base 7 is provided with a positioning pin 6. One end of the linear servo 4 is connected and fixed to the mounting bracket 3 through the positioning pin, and the other end is connected to the fixed base 7 through the positioning pin 6. The precise zero position is determined through the positioning pin hole.

[0032] The straight line displacement detection mechanism comprises a mounting base 1 fixedly connected with the base 5, and a fixed support 9 movably connected with the base 5, wherein a scale shaft 10 is slidably arranged in the fixed support 9; one end of the straight line servo 4 is connected and fixed with the mounting base 1 through a positioning pin, and the other end is connected with the scale shaft 10 through a connecting block 12; the mounting base 1, the fixed support 9 and the scale shaft 10 are connected into a whole through the guide plate 2, and the corresponding moving distance value of the straight line servo 4 is directly read through the movement of the scale shaft 10.

[0033] During installation, the installation position of the mounting base 1 and the mounting support 3 on the base 5 can be adjusted to install servo motors of different sizes, and the consistency of the mechanical zero position of the straight line servo 4 with the design required zero position is detected.

[0034] In the embodiment, a group of mounting screw holes and pin holes are arranged on one side of the base 5 for fixing and positioning the mounting support 3 and the fixed seat 7; a group of screw holes are arranged at one end of the other side of the base 5 for fixing the mounting base 1, and a long waist-shaped hole is arranged at the other end for connecting with the fixed support 9; the fixed support 9 can be moved and adjusted in the waist-shaped hole to meet the installation of straight line servos 4 of different models, and is fixed on the base 5 through a special screw 11 after adjustment; two groups of screw holes are further arranged on the base 5 for fixing the guide plate 2; the guide plate 2 is fixed on the base 5 through 90° countersunk head screws, and the countersunk head screws are not allowed to protrude from the guide plate 2 to avoid affecting the installation of the mounting base 1, the mounting support 3, the fixed seat 7 and the fixed support 9.

[0035] In the embodiment, through holes are arranged on the bottom surfaces of the mounting support 3, the fixed seat 7, the mounting base 1 and the fixed support 9 for fixing the base 5 together, and pin holes are further arranged on the bottom of the mounting support 3, the fixed seat 7 and the mounting base 1 for matching with the pin holes on the base 5.

[0036] In the embodiment, scales are arranged on the base 5 for use when the zero position size of the straight line servo 4 is changed.

[0037] In the embodiment, a boss is arranged on the guide plate 2, recesses are arranged on the bottoms of the mounting base 1, the mounting support 3, the fixed seat 7 and the fixed support 9, and the boss and the recesses are matched and positioned with each other, and small gap cooperation is adopted between the boss and the recess, which can guarantee the coaxiality requirement of the assembled straight line servo 4 and the convenience of assembly.

[0038] In the embodiment, a pin hole matched with the positioning pin 6 is arranged on the top of the fixed seat 7, and the pin hole and the support of the positioning pin 6 adopt H7 / g6 gap cooperation, i.e. a certain gap is guaranteed; the fixed seat 7 is connected and fixed with the straight line servo 4 through the screw holes and the pin holes on the servo.

[0039] In the embodiment, the upper end surface of the fixed support 9 has a through hole for mounting the scribing shaft 10. The fixed support 9 is provided with a set screw 8, and the outer circle of the scribing shaft 10 has a milled flat portion, and the set screw 8 is fixed on the milled flat portion. The fixed support 9 is an important detection component and needs to be repeatedly used. The component has certain strength and wear resistance. The component is made of a steel plate and is subjected to quenching and tempering treatment. The hole on the component is matched with the scribing shaft 10 in the H7 / g6 matching requirement. The end surface A of the fixed support 9 is flush with the "0" scribe line on the bottom surface. The A surface of the fixed support 9 is a conical annular surface, which facilitates observation of the scribe line and scribe line numbers of the scribing shaft 10.

[0040] In the embodiment, the scribing shaft 10 is scribed with a scale and a linear displacement mark. The scale is a symmetrical moving distance value, and the moving distance can be adjusted according to the design requirement of the linear actuator 4. When different displacement signals are input to each linear actuator 4 by using a tester, the corresponding displacement of the linear actuator 4 should meet the requirement. The scribing shaft 10 is matched with the outer square of the connecting block 12 through the square hole. The connecting block 12 is connected with the linear actuator 4 through a special screw 11. The connecting block 12 is matched with the connecting pin 13 of the linear actuator 4 in a small gap, which facilitates disassembly during detection. The scribing shaft 10 needs to be frequently slid in the fixed support 9. The component is made of a round steel and is subjected to quenching treatment. The scribing shaft 10 is scribed with a scribe line. When used, the "0" scribe line of the scribing shaft 10 is ensured to be consistent with the end surface of the fixed support 9. The scribing shaft 10 has a flat surface on the back of the scribe line. After the linear actuator 4 moves to a specified position, the set screw 8 is fixed.

[0041] In the embodiment, the two positioning pins of the mounting seat 1 are connected with the linear actuator 4, and the other end is fixed in the hole of the mounting support 3 through the positioning pin 6 to detect the zero position of the linear actuator 4. The mounting holes on the base 5 enlarge the size range of the zero position detection of the linear actuator 4. The fixed seat 7 and the fixed support 9 are mounted on the base 5. The linear displacement detection of the linear actuator 4 is completed through the movement of the scribing shaft 10 in the fixed support 9. The waist-shaped hole on the base 5 can be used for linear displacement detection of the linear actuator 4 with different zero positions.

[0042] The above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for zero-position detection and linear displacement testing of a linear servo motor, characterized in that: The device comprises a base, two sets of guide plates fixedly installed on the base, zero correction mechanisms respectively installed on the two sets of guide plates, and a linear displacement detection mechanism; The zero correction mechanism comprises an installation support and a fixing seat fixedly connected with the base, and a positioning pin hole arranged on the base and the guide plates, the fixing seat is provided with a positioning pin, one end of the linear actuator is connected and fixed with the installation support through the positioning pin, the other end is connected with the fixing seat through the positioning pin, and the accurate zero position is determined through the positioning pin hole; The linear displacement detection mechanism comprises an installation seat fixedly connected with the base and a fixing support movably connected with the base, a scale shaft is slidably installed in the fixing support, one end of the linear actuator is connected and fixed with the installation seat through the positioning pin, the other end is connected with the scale shaft through the connecting block, and the corresponding moving distance value of the linear actuator is directly read through the movement of the scale shaft; The base is provided with a scale line for use when the zero size of the linear actuator is changed; The guide plate has a boss, the installation seat, the installation support, the fixing seat and the fixing support are all provided with grooves, and the grooves are matched with the guide plate for positioning; The upper end surface of the fixing support is provided with a through hole for installing the scale shaft; The scale shaft is marked with a scale and a linear displacement mark, the scale is symmetrical in moving distance value, the scale shaft is connected with the connecting block through the square hole, and the connecting block is connected with the linear actuator through the special screw.

2. The zero position detection and linear displacement testing device of a linear actuator according to claim 1, characterized in that: One side of the base is provided with a set of installation screw holes and pin holes for fixing and positioning of the installation support and the fixing seat, one end of the other side is provided with a set of screw holes for fixing of the installation seat, and the other end is provided with a long waist-shaped hole for connection with the fixing support; the base is also provided with two sets of screw holes for fixing of the guide plates.

3. The zero position detection and linear displacement testing device of a linear actuator according to claim 2, characterized in that: The bottom surfaces of the installation support, the fixing seat, the installation seat and the fixing support are all provided with through holes for fixing with the base, and the bottom surfaces of the installation support, the fixing seat and the installation seat are also provided with pin holes matched with the pin holes on the base.

4. The zero position detection and linear displacement testing device of a linear actuator according to claim 1, characterized in that: The top of the fixing seat is provided with a pin hole matched with the positioning pin, and the fixing seat is connected and fixed with the linear actuator through the screw hole and the pin hole on the actuator.

5. The zero position detection and linear displacement testing device of a linear actuator according to claim 1, wherein: The fixing support is provided with a set screw, and the outer circle of the scale shaft has a milled flat part, and the set screw is fixed on the flat surface of the milled flat part.

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