Rotating lever type aircraft safety valve microswitch device

Abstract

The utility model discloses a rotary lever aircraft safety valve microswitch device, and relates to a microswitch device. The switch comprises a switch base, a switch connecting seat, a switch rotating support and a microswitch, a switch rotating shaft is arranged in the switch rotating support and is connected with an inner ring of a torsion spring, one fulcrum of the torsion spring is contacted with one end of the switch rotating plectrum, and the other fulcrum is contacted with the top of the right end of the switch base; one end of the switch rotating plectrum corresponds to the microswitch and is in contact with one fulcrum of the torsion spring, and the other end of the switch rotating plectrum corresponds to the pressing block screw. The device can meet the requirement for accurate feedback of the opening state of the aircraft safety valve.

Description

Technical Field

[0001] The utility model relates to a micro switch device, more specifically to a micro switch device for a rotating lever aircraft safety valve. Background Art

[0002] In the field of civil aircraft, the open and closed status signal feedback of the cabin pressure valve is of great significance to the aircraft's operating status and health monitoring. With the rapid development of my country's civil aviation design and manufacturing, the requirements for the open and closed status detection of safety valves are becoming increasingly higher, and the requirements for the accuracy and reliability of opening status monitoring are becoming increasingly higher.

[0003] The existing technology focuses on whether the microswitch is turned on, and does not conduct in-depth analysis on the accuracy and reliability of the micro-opening signal feedback at the opening point; whether the microswitch is turned on is determined by the trigger stroke of the microswitch. The trigger stroke of the microswitch is above 0.5mm and not more than 1mm, which can meet the requirements of the valve body's sealing and vibration resistance environment; the micro-opening signal state of the opening point is determined by the differential stroke of the microswitch, but the differential stroke of the microswitch is about 0.13mm, which cannot meet the accuracy and reliability requirements of the opening state monitoring (the trigger point is the point where the microswitch starts to trigger, the release point is the point where the microswitch starts to release, and the distance between the trigger point and the release point is the differential stroke).

[0004] Therefore, it is necessary to develop a micro switch device that can amplify the differential stroke of the micro switch. Utility Model Content

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and to provide a rotary lever aircraft safety valve micro switch device.

[0006] To achieve the above-mentioned object, the technical solution of the present utility model is: a rotary lever aircraft safety valve micro switch device, characterized in that it includes a switch base, a switch connecting seat arranged on the top left side of the switch base, a switch rotating support arranged on the top right side of the switch base, and a micro switch arranged on the top of the switch connecting seat;

[0007] A switch rotating shaft is provided in the switch rotating support, the switch rotating shaft is connected to the inner ring of the torsion spring, one fulcrum of the torsion spring contacts one end of the switch rotating paddle, and the other fulcrum contacts the top of the right end of the switch base;

[0008] One end of the switch rotating paddle corresponds to the micro switch and contacts a fulcrum of the torsion spring, and the other end corresponds to the pressing block screw.

[0009] In the above technical solution, the switch rotating paddle is L-shaped, one end of the switch rotating paddle contacts a fulcrum of the torsion spring, and the other end passes through the switch rotating support and corresponds to the pressure block screw.

[0010] In the above technical solution, a distance-adjusting gasket is provided between the switch connecting seat and the micro switch.

[0011] In the above technical solution, the switch connecting seat is fixed to the switch base by a first screw and a first washer.

[0012] In the above technical solution, the switch rotating support is fixed to the switch base through a second washer and a second screw.

[0013] In the above technical solution, the micro switch is fixed to the switch connecting base through a third washer, a third screw, and a nut.

[0014] In the above technical solution, retaining rings are provided at both ends of the switch rotating shaft.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1) The present invention can meet the demand for accurate feedback on the opening status of aircraft safety valves. It can not only effectively amplify and adjust the differential stroke of the micro switch of 0.13mm to the stroke of the pressure block screw connected to the valve body of 0.5mm, but also has the advantages of high rigidity of the L-shaped switch rotary paddle and long life and reliability of the torsion spring drive. In addition, the switch rotary paddle effectively saves space and has a compact structure.

[0017] 2) The utility model is suitable for monitoring the opening status of the safety valve of the aircraft pressurized cabin. It has the advantages of amplifying the differential stroke of the micro switch (0.13mm is amplified to a maximum of 0.8mm), adjustable amplification stroke (0.3mm-0.8mm), high opening signal monitoring accuracy (0.5mm), high reliability, and resistance to vibration and impact.

[0018] 3) The utility model realizes the adjustable rotation lever ratio, which overcomes the difficulty of signal debugging during assembly caused by the non-adjustable lever ratio of the micro switch in the prior art, and can greatly shorten the micro switch adjustment time during assembly.

[0019] 4) The utility model meets the requirements of aircraft airworthiness, has a simple and reliable structure, high signal accuracy, is resistant to aircraft vibration and impact environment, has complete functions, and is easy to use and promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the utility model.

[0021] Figure 2 for Figure 1 Cross-sectional view at AA in the middle.

[0022] Figure 3 This is a schematic diagram of the valve body opening point and the differential stroke of the micro switch in the present invention.

[0023] Figure 4 It is a schematic diagram of the matching between the pressure block screw and the valve body.

[0024] Among them, 1-switch base, 2-switch connecting base, 21-first screw, 22-first washer, 3-switch rotating support, 31-switch rotating shaft, 32-torsion spring, 33-switch rotating paddle, 34-second washer, 35-second screw, 36-retaining ring, 4-micro switch, 41-adjustable distance gasket, 42-third washer, 43-third screw, 44-nut, 5-block screw, 6-valve body. DETAILED DESCRIPTION

[0025] The following detailed description of the implementation of the present invention is provided in conjunction with the accompanying drawings, which do not limit the present invention and are merely examples. The advantages of the present invention will become clearer and easier to understand through the description.

[0026] Referring to the accompanying drawings, a rotary lever aircraft safety valve micro switch device is characterized by comprising a switch base 1, a switch connecting base 2 disposed on the left top of the switch base 1, a switch rotating support 3 disposed on the right top of the switch base 1, and a micro switch 4 disposed on the top of the switch connecting base 2;

[0027] A switch rotating shaft 31 is provided in the switch rotating support 3, and the switch rotating shaft 31 is connected to the inner ring of the torsion spring 32. One fulcrum of the torsion spring 32 contacts one end of the switch rotating paddle 33, and the other fulcrum contacts the top of the right end of the switch base 1;

[0028] One end of the switch rotating paddle 33 corresponds to the micro switch 4 and contacts a fulcrum of the torsion spring 32, and the other end corresponds to the pressure block screw 5;

[0029] The pressure block screw 5 is connected to the valve body 6; when the valve body 6 is opened, the first fulcrum of the torsion spring 32 drives the switch rotating paddle 33 to trigger the micro switch 4; when the valve body 6 is closed, the pressure block screw 32 presses the switch rotating paddle 33, releases the pressure on the micro switch 4, and releases the micro switch 4.

[0030] The switch rotating paddle 33 is L-shaped, one end of the switch rotating paddle 33 contacts a fulcrum of the torsion spring 32 , and the other end passes through the switch rotating support 3 and corresponds to the pressure block screw 5 .

[0031] Distance-adjusting spacers 41 are provided between the switch connection base 2 and the micro switch 4 ; the number of the distance-adjusting spacers 41 can be adjusted, and the thickness of the distance-adjusting spacers 41 is 0-0.5 mm. The installation distance of the micro switch 4 is adjusted by the number of the distance-adjusting spacers 41 .

[0032] The switch connection base 2 is fixed to the switch base 1 by a first screw 21 and a first washer 22 .

[0033] The switch rotating support 3 is fixed to the switch base 1 through a second washer 34 and a second screw 35 .

[0034] The micro switch 4 is fixed to the switch connecting base 2 by a third washer 42 , a third screw 43 , and a nut 44 .

[0035] Retaining rings 36 are provided at both ends of the switch rotating shaft 31 to prevent the switch rotating shaft 31 from escaping from the switch rotating support 3 .

[0036] In actual use, the pressure block screw 5 is connected to the valve body 6; when the valve body 6 is opened, the torsion spring 32 drives the switch rotating paddle 33 to trigger the micro switch 4; when the valve body 6 is closed, the pressure block screw 5 presses the switch rotating paddle 33 to release the micro switch 4.

[0037] The switch rotating shaft 31 hinges the inner ring of the torsion spring 32 and the mounting hole of the switch rotating paddle 33 to the mounting hole of the switch rotating support 3; the torsion spring 32 and the switch rotating paddle 33 are radially supported on the switch rotating support 3 by the switch rotating shaft 31; the main body of the switch rotating paddle 33 is an L-shaped pressure plate with mounting holes on both sides of the L-shape, and is installed on the switch rotating shaft 31.

[0038] The main body of the switch rotary paddle 33 is an L-shaped pressure plate, which has the characteristics of high rigidity and compact structure compared with the existing flat-plate pressure plate; it meets the signal accuracy and stability requirements in harsh environments such as vibration and impact at the opening point of the safety valve.

[0039] The pressure block screw 5 changes with the opening and closing positions of the valve body 6, and the fully closed position of the valve body 6 is defined as the zero position; when the safety valve is in the fully closed position, the pressure block screw 5 installed on the valve body 6 presses the switch rotating paddle 33, and the pressure block screw 5 installed on the valve body 6 presses the switch rotating paddle 33, and the switch rotating paddle 33 overcomes the force of the torsion spring 32 and rotates to release the contacts of the micro switch 4; when the safety valve is opened, the pressure block screw 5 loosens the switch rotating paddle 33, and the torque of the torsion spring 32 presses the switch rotating paddle 33, and the switch rotating paddle 33 triggers the contacts of the micro switch 4.

[0040] The micro switch 4 is wired to a common terminal and a normally open terminal; when the safety valve is in the fully closed position, the pressure block screw 5 presses the switch rotating paddle 33 to rotate, and the micro switch 4 is in the released state and outputs an open circuit signal; when the safety valve is opened, the pressure block screw 5 loosens the switch rotating paddle 33, and the torque of the torsion spring 32 drives the switch rotating paddle 33 to rotate, and the switch rotating paddle 33 presses the micro switch 4 to close, and the micro switch 4 outputs a connection signal.

[0041] The utility model realizes the adjustable rotation lever ratio, overcomes the difficulty of signal debugging during assembly caused by the non-adjustable lever ratio of the micro switch in the prior art, and can greatly shorten the adjustment time of the micro switch 4 during assembly.

[0042] The existing technology focuses on whether the micro switch 4 is turned on, but does not analyze the feedback status of the micro switch opening signal at the opening point; whether the micro switch 4 turns on the signal function is determined by the trigger stroke of the micro switch 4. When the trigger stroke of the micro switch 4 reaches 0.5mm, it can only meet the sealing and vibration resistance requirements of the closed position of the valve body 6; the opening signal performance of the micro switch 4 is determined by the differential stroke of the micro switch 4. The differential stroke of the micro switch 4 is about 0.13mm, which cannot meet the accuracy and reliability requirements of the opening state monitoring.

[0043] When the valve body 6 of the safety valve of the present invention drives the pressure block screw 5 to move upward from fully closed to no more than 0.5 mm, the micro switch 4 remains in the released state (this 0.5 mm is the stroke of the micro switch 4 corresponding to the amplified stroke of the pressure block screw 5); when the valve body 6 of the safety valve drives the pressure block screw 5 to move upward from fully closed to 1 mm, the micro switch 4 is triggered. The difference between the two is the differential stroke of the micro switch 4, which corresponds to the amplified stroke of the pressure block screw 5 of 0.5 mm.

[0044] The utility model realizes that when the initial displacement is within 0.5mm, the micro switch 4 feeds back an open signal; when the displacement reaches 1mm, the micro switch 4 feeds back a connection signal; the initial 0.5mm stroke ensures the sealing and vibration and impact resistance environment requirements of the valve body 6, avoids false alarms of the opening signal, and improves reliability; the 0.5mm-1mm stroke meets the accuracy requirements of the opening state; therefore, the utility model meets the accuracy and reliability requirements of aircraft for monitoring the opening state of the cabin safety valve.

[0045] In the present utility model, the differential stroke of the micro switch 4 of 0.13mm corresponds to the amplified stroke of 0.5mm at the pressure block screw 5, which is only an implementation case of the present utility model; the present utility model can adjust the differential stroke of the micro switch 4 of 0.13mm to the movement stroke of the valve body 6 end to a range of 0.3mm-0.8mm.

[0046] Other parts not described belong to the prior art.

Claims

1. A rotary lever aircraft safety valve micro switch device, characterized by: The switch comprises a switch base (1), a switch connecting base (2) arranged on the top of the left side of the switch base (1), a switch rotating support (3) arranged on the top of the right side of the switch base (1), and a micro switch (4) arranged on the top of the switch connecting base (2); A switch rotating shaft (31) is provided in the switch rotating support (3), the switch rotating shaft (31) is connected to the inner ring of the torsion spring (32), one fulcrum of the torsion spring (32) contacts one end of the switch rotating paddle (33), and the other fulcrum contacts the top of the right end of the switch base (1); One end of the switch rotating paddle (33) corresponds to the micro switch (4) and contacts a fulcrum of the torsion spring (32), and the other end corresponds to the pressing block screw (5).

2. The rotary lever aircraft safety valve micro switch device according to claim 1, characterized in that: The switch rotating paddle (33) is L-shaped, one end of the switch rotating paddle (33) contacts a fulcrum of the torsion spring (32), and the other end passes through the switch rotating support (3) and corresponds to the pressing block screw (5).

3. The rotary lever aircraft safety valve micro switch device according to claim 1, characterized in that: A distance-adjusting gasket (41) is provided between the switch connection seat (2) and the micro switch (4).

4. The rotary lever aircraft safety valve micro switch device according to claim 1, characterized in that: The switch connection seat (2) is fixed to the switch base (1) via a first screw (21) and a first washer (22).

5. The rotary lever aircraft safety valve micro switch device according to claim 4, characterized in that: The switch rotating support (3) is fixed to the switch base (1) via a second washer (34) and a second screw (35).

6. The rotary lever aircraft safety valve micro switch device according to claim 3, characterized in that: The micro switch (4) is fixed to the switch connection seat (2) via a third washer (42), a third screw (43), and a nut (44).

7. The rotary lever aircraft safety valve micro switch device according to claim 1, characterized in that: Retaining rings (36) are provided at both ends of the switch rotating shaft (31).

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