Position area identification device based on microswitch

Abstract

The invention belongs to the technical field of position area identification of aviation equipment, and particularly relates to a position area identification device based on a microswitch, which is used for position area identification of a multi-position actuator and comprises a mounting bottom plate, a cam mechanism, a trigger and the microswitch, the position area where the output shaft of the electric actuator is located can be recognized under the condition that traditional sensors such as a potentiometer are not used, the advantages of a switching circuit of the microswitch are combined, a control circuit can be simpler and more reliable, operation is flexible and convenient, and the control circuit can be widely applied to aviation electric actuator devices.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation equipment location area identification, and in particular relates to a location area identification device based on a micro switch. Background Art

[0002] In the prior art, the position area identification of the rotating device is mainly based on angular position sensors, resolvers, etc., while the micro switch is mainly used for automatic control and monitoring in electronics, instruments, aviation, aerospace, and mechanical electrical appliances. Its characteristics are that under the action of the instantaneous mechanism inside the switch, the switch contacts can switch quickly, the action is sensitive, and the parameter accuracy is high. The micro switch is generally driven by a mechanical mechanism. The mechanical force acts on the action reed through the transmission element (pin, button, lever, roller, etc.). When the action reed moves to the critical point, an instantaneous action is generated, so that the moving contact and the fixed contact of the action reed are quickly connected or disconnected. At present, there are few mechanisms that use micro switches to switch to identify the position area of ​​the product. Summary of the invention

[0003] In view of this, the present invention provides a position area identification device based on a micro switch, and designs a position area identification device based on a micro switch in combination with the structural characteristics of the micro switch.

[0004] The technical solution of the present invention is:

[0005] A position area recognition device based on a micro switch is used for position area recognition of a multi-position actuator, and the area recognition device comprises:

[0006] Install the base plate;

[0007] A cam mechanism, rotatably mounted on the base plate and fixedly connected to the rotating shaft of the actuator;

[0008] A trigger, fixed to the mounting base plate, which generates a specific displacement after being triggered by the cam mechanism at a specific angular position;

[0009] A micro switch, mounted on the mounting base plate, is triggered by the specific displacement and emits an electrical signal;

[0010] Among them, the number of the triggers is at least three groups, the number of the micro switches is at least three groups, and each of the micro switches is triggered by each of the triggers respectively; the electrical signals of each of the micro switches are combined to describe the angular position of the actuator.

[0011] Furthermore, the cam mechanism includes a plate-shaped upper cam and a lower cam that are arranged in parallel; the upper cam is used to trigger one group of the triggers, and the lower cam triggers the remaining two groups of the triggers.

[0012] Furthermore, the three upper triggering concave points arranged on the upper cam have an angle of 90° between the lines connecting adjacent upper triggering concave points and the central axis of the actuator.

[0013] Furthermore, the cam surface edge of the upper cam includes an upper circular arc convex edge and three upper circular arc concave edges; the upper circular arc convex edge is coaxially arranged with the actuator; the centers of the three upper circular arc concave edges are at the same distance from the central axis of the actuator; one group of the upper circular arc concave edges is rotated 90° on both sides with the central axis as the axis center and then coincides with the remaining two groups of the upper circular arc concave edges, and the midpoint of this upper circular arc concave edge is on the line connecting the midpoint of the upper circular arc convex edge and the central axis.

[0014] Furthermore, the arc angle of the upper arc edge is less than 90°, and both ends are connected to an upper arc concave edge.

[0015] Furthermore, two lower triggering concave points are arranged on the lower cam, and the angle between the two lower triggering concave points and the central axis is less than 90°.

[0016] Further, the cam surface edge of the lower cam includes two lower circular arc convex edges and two lower circular arc concave edges;

[0017] The midpoints of the two lower arc convex edges and the line connecting the central axis are on the same straight line; the two lower arc concave edges are located at the intersection of the two ends of the two upper arc convex edges.

[0018] Further, the trigger includes a small shaft, a rocker arm, a bearing, a trigger block and a torsion spring;

[0019] The middle part of the rocker arm is rotatably connected to the small shaft, and the small shaft is mounted on the mounting base plate; the bearing and the trigger block are respectively arranged at two ends of the rocker arm;

[0020] One end of the torsion spring acts on the mounting base plate, and the other end acts on the rocker arm; the torsion spring pushes the rocker arm to rotate around the small shaft, so that the outer ring of the bearing moves close to the cam surface edge of the upper cam or the lower cam; the trigger block is used to trigger the micro switch.

[0021] Furthermore, the micro switch sends different electrical signals based on different triggering depths of the trigger.

[0022] Furthermore, the trigger block is a set screw; and the length of the set screw protruding from the rocker arm is adjustable.

[0023] The beneficial effects brought by the present invention are as follows: the present invention proposes a position area identification device based on a micro switch, which can identify the position area of ​​the output shaft of the electric actuator without using traditional sensors such as potentiometers, and combined with the advantages of the micro switch's own switching circuit, can make the control circuit simpler and more reliable, and the operation is flexible and convenient, and can be widely used in aviation electric actuator devices;

[0024] The present invention arranges a double-layer cam and sets a special trigger angle for the micro switch, which can reduce the complexity of the device while ensuring the measuring range. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a structural schematic diagram of a position area identification device based on a micro switch in a specific implementation manner of the present invention;

[0027] Figure 2 It is a structural schematic diagram of a cam mechanism in a specific implementation manner of the present invention;

[0028] Figure 3 It is a schematic diagram of the cam surface edge structure of the upper cam in a specific implementation manner of the present invention;

[0029] Figure 4 It is a schematic diagram of the cam surface edge structure of the lower cam in a specific implementation manner of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of a trigger in a specific implementation manner of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of a torsion spring in a specific embodiment of the present invention;

[0032] Among them: 1. Installation base plate; 2. Trigger; 3. Micro switch; 4. Torsion spring; 6. Cam mechanism; 7. Small shaft; 21. Set screw; 22. Rocker arm; 23. Mounting screw; 24. Bushing; 25. Bearing; 31. First micro switch; 32. Second micro switch; 33. Third micro switch; 61. Upper cam; 62. Lower cam. DETAILED DESCRIPTION

[0033] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0034] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0035] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0036] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The illustrations only show components related to the present disclosure rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0037] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described may be practiced without these specific details.

[0038] In one embodiment of the present invention, a position region identification device based on a micro switch is provided for position region identification of a multi-position actuator, such as Figure 1-6 As shown, the region identification device includes:

[0039] Install the base plate 1;

[0040] The cam mechanism 6 is rotatably mounted on the bottom plate and fixedly connected to the rotating shaft of the actuator;

[0041] The trigger 2 is fixed on the mounting base plate 1 and generates a specific displacement after being triggered by the cam mechanism 6 at a specific angular position;

[0042] The micro switch 3 is mounted on the mounting base plate 1 and is triggered by a specific displacement and emits an electrical signal;

[0043] There are at least three groups of triggers 2 and at least three groups of micro switches 3. Each micro switch 3 is triggered by each trigger 2. The electrical signals of each micro switch 3 are combined to describe the angular position of the actuator.

[0044] In this embodiment, the cam mechanism 6 includes a plate-shaped upper cam 61 and a lower cam 62 that are arranged in parallel; the upper cam 61 is used to trigger one group of triggers 2, and the lower cam 62 triggers the remaining two groups of triggers 2.

[0045] In this embodiment, the three upper triggering concave points disposed on the upper cam 61 have an angle of 90° between the lines connecting adjacent upper triggering concave points and the central axis of the actuator.

[0046] In this embodiment, the cam surface edge of the upper cam 61 includes an upper circular arc convex edge and three upper circular arc concave edges; the upper circular arc convex edge is coaxially arranged with the actuator; the centers of the three upper circular arc concave edges are at the same distance from the central axis of the actuator; one group of upper circular arc concave edges is rotated 90° on both sides with the central axis as the axis center and then coincides with the remaining two groups of upper circular arc concave edges, and the midpoint of this upper circular arc concave edge is on the line connecting the midpoint of the upper circular arc convex edge and the central axis.

[0047] In this embodiment, the arc angle of the upper arc edge is less than 90°, and both ends are connected to an upper arc concave edge.

[0048] In this embodiment, two lower triggering concave points are arranged on the lower cam 62, and the angle between the two lower triggering concave points and the central axis is less than 90°.

[0049] In this embodiment, the cam surface edge of the lower cam 62 includes two lower arc convex edges and two lower arc concave edges;

[0050] The midpoints of the two lower arc convex edges and the line connecting the central axis are on the same straight line; the two lower arc concave edges are located at the intersection of the two ends of the two upper arc convex edges.

[0051] In this embodiment, the trigger 2 includes a small shaft 7, a rocker arm 22, a bearing 25, a trigger block and a torsion spring 4;

[0052] The middle part of the rocker arm 22 is rotatably connected to the small shaft 7, and the small shaft 7 is mounted on the mounting base plate 1; the bearing 25 and the trigger block are respectively arranged at both ends of the rocker arm 22;

[0053] One end of the torsion spring 4 acts on the mounting base plate 1, and the other end acts on the rocker arm 22; the torsion spring 4 pushes the rocker arm 22 to rotate around the small shaft 7, so that the outer ring of the bearing 25 moves close to the cam surface edge of the upper cam 61 or the lower cam 62; the trigger block is used to trigger the micro switch 3.

[0054] In this embodiment, the micro switch 3 sends different electrical signals based on different triggering depths of the trigger 2 .

[0055] In this embodiment, the trigger block is a set screw 21; the length of the set screw 21 protruding from the rocker arm 22 is adjustable.

[0056] The torsion spring 4 and the trigger 2 of this embodiment are connected to the mounting base plate 1 through the small shaft 7, and the trigger 2 can rotate around the small shaft 7. The extension length of the set screw 21 on the trigger 2 can be adjusted by adjusting the screwing length, wherein the bushing 24 and the bearing 25 are connected to the rocker arm 22 through the mounting screw 23, and the bearing 25 can rotate around the mounting screw 23;

[0057] The trigger 2 of this embodiment compresses the torsion spring 4, and the torsion spring 4 acts on the button of the micro switch 3 through the set screw 21 on the trigger 2, and the micro switch 3 is in a pressed state. When the switch is triggered, the cam mechanism 6 rotates to make the contact surface of the bearing 25 slide from the concave surface to the convex surface, and the cam mechanism 6 begins to compress the bearing 25). The trigger 2 rotates to release the torsion force acting on the micro switch 3, and the micro switch 3 automatically flips to achieve the switching of the micro switch 3;

[0058] In order to enable the micro switch 3 to send different signals in different areas, a cam mechanism 6 with two layers is designed. The lower cam surface is mainly used to trigger the second micro switch 32 and the third micro switch 33, and the upper cam surface is mainly used to trigger the first micro switch 31.

[0059] like Figure 3 , 4 As shown, the lower cam surface of the cam mechanism 6 of this embodiment consists of a convex surface and a concave surface, the angle of the concave surface is greater than 90°, and the upper cam surface consists of three concave surfaces and two convex surfaces, wherein the angle between the three concave surfaces is 90°.

[0060] In this embodiment, the output shaft of the electric actuator drives the cam mechanism 6 to rotate within a certain angle range. When the cam mechanism 6 rotates to different positions, different micro switches 3 are triggered in sequence to emit different signals corresponding to different positions. When the bearing 25 on the trigger 2 is on the concave surface of the cam mechanism 6, the micro switch emits one signal; when the bearings 25 on the trigger 2 are all on the convex surface of the cam mechanism 6, the micro switch switches to emit another signal.

[0061] In this embodiment, when the output shaft of the actuator is at the middle position (0 degree position), the bearings 25 on the three triggers 2 are all located on the concave surface of the cam mechanism 6 .

[0062] When the output shaft of the actuator rotates counterclockwise at the middle position (0 degree position) (the output shaft rotates from 0 degree to -90 degree area), the bearing 25 on the trigger 2 corresponding to the first micro switch 31 slides from the concave surface of the cam mechanism 6 to the convex surface, and the signal sent by the micro switch switches from the concave surface of the cam to the convex surface; the bearing 25 on the trigger 2 corresponding to the second micro switch 32 is still on the concave surface of the cam mechanism 6; the bearing 25 on the trigger 2 corresponding to the third micro switch 33 slides from the concave surface of the cam mechanism 6 to the convex surface.

[0063] Job Description

[0064] When the cam mechanism 6 is at the 0 degree position, the bearing 25 on the trigger 2 is on the concave surface of the cam mechanism 6, and the torsion force of the torsion spring 4 installed on the trigger 2 is applied to the button of the micro switch 3 through the set screw 21 via the L-shaped rocker arm 22 that can rotate around the axis, so that the micro switch 3 is always kept in the pressed state. At this time, the signal sent by the micro switch can be recorded as a 0 signal.

[0065] When the cam mechanism 6 rotates with the output shaft, the bearing 25 on the trigger 2 slides to the convex surface of the cam mechanism 6, and the convex surface squeezes the bearing 25 on the trigger 2, overcoming the torque of the torsion spring 4 to make the trigger 2 rotate around the small shaft 7. At this time, the set screw 21 is away from the button of the micro switch 3, and the micro switch 3 realizes reverse switching. At this time, the signal sent by the micro switch can be recorded as signal 1.

[0066] When the cam mechanism 6 rotates with the output shaft, the convex and concave surfaces at different positions of the cam mechanism 6 trigger three different micro switches 3 to send different signals, thereby determining the position area of ​​the output shaft:

[0067] When the cam mechanism 6 is at the 0 degree position, the micro switch 3 sends a 000 signal;

[0068] When the cam mechanism 6 is in the -90°~0 area, the micro switch 3 sends a 101 signal;

[0069] When the cam mechanism 6 is at the -90° position, the micro switch 3 sends a 001 signal;

[0070] When the cam mechanism 6 is in the 0-90° area, the micro switch 3 sends a 110 signal;

[0071] When the cam mechanism 6 is at the 90° position, the micro switch 3 sends a 010 signal.

[0072] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A position area recognition device based on a micro switch, characterized in that: Used for position area recognition of a multi-position actuator, the area recognition device comprises: Install the base plate; A cam mechanism, rotatably mounted on the base plate and fixedly connected to the rotating shaft of the actuator; A trigger, fixed to the mounting base plate, which generates a specific displacement after being triggered by the cam mechanism at a specific angular position; A micro switch, mounted on the mounting base plate, is triggered by the specific displacement and emits an electrical signal; Among them, the number of the triggers is at least three groups, the number of the micro switches is at least three groups, and each of the micro switches is triggered by each of the triggers respectively; the electrical signals of each of the micro switches are combined to describe the angular position of the actuator.

2. The position area recognition device based on micro switch according to claim 1 is characterized in that: The cam mechanism comprises a plate-shaped upper cam and a lower cam which are arranged in parallel; the upper cam is used to trigger one group of the triggers, and the lower cam triggers the remaining two groups of the triggers.

3. The position area recognition device based on micro switch according to claim 2 is characterized in that: The three upper triggering concave points arranged on the upper cam have an angle of 90° between the lines connecting the adjacent upper triggering concave points and the central axis of the actuator.

4. The position area recognition device based on micro switch according to claim 3 is characterized in that: The cam surface edge of the upper cam includes an upper circular arc convex edge and three upper circular arc concave edges; the upper circular arc convex edge is coaxially arranged with the actuator; the centers of the three upper circular arc concave edges are at the same distance from the central axis of the actuator; one group of the upper circular arc concave edges is rotated 90° on both sides with the central axis as the axis center and then coincides with the remaining two groups of the upper circular arc concave edges respectively, and the midpoint of this upper circular arc concave edge is on the line connecting the midpoint of the upper circular arc convex edge and the central axis.

5. The micro switch-based position area recognition device according to claim 4, characterized in that: The arc angle of the upper arc edge is less than 90°, and both ends are connected to an upper arc concave edge.

6. The position area recognition device based on micro switch according to claim 5 is characterized in that: The lower cam is provided with two lower triggering concave points, and the angle between the two lower triggering concave points and the central axis is less than 90°.

7. The micro switch-based position area recognition device according to claim 6, characterized in that: The cam surface edge of the lower cam includes two lower circular arc convex edges and two lower circular arc concave edges; The midpoints of the two lower arc convex edges and the line connecting the central axis are on the same straight line; The two lower arc concave edges are located at the intersection of two ends of the two upper arc convex edges.

8. The position area recognition device based on micro switch according to claim 7 is characterized in that: The trigger comprises a small shaft, a rocker arm, a bearing, a trigger block and a torsion spring; The middle part of the rocker arm is rotatably connected to the small shaft, and the small shaft is mounted on the mounting base plate; the bearing and the trigger block are respectively arranged at two ends of the rocker arm; One end of the torsion spring acts on the mounting base plate, and the other end acts on the rocker arm; the torsion spring pushes the rocker arm to rotate around the small shaft, so that the outer ring of the bearing moves close to the cam surface edge of the upper cam or the lower cam; the trigger block is used to trigger the micro switch.

9. The position area recognition device based on micro switch according to claim 1, characterized in that: The micro switch sends different electrical signals based on different triggering depths of the trigger.

10. The position area recognition device based on micro switch according to claim 8, characterized in that: The trigger block is a set screw; the length of the set screw protruding from the rocker arm is adjustable.

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