Position detection device for space cabin door opening and closing mechanism

Abstract

The invention discloses a position detection device for a space cabin door opening and closing mechanism. The position detection device comprises the space cabin door opening and closing mechanism, a microswitch, a cabin door closing position detection device and a cabin door opening position detection device, the space cabin door opening and closing mechanism comprises a cabin door, a base plate, a connecting rod mechanism and a driving mechanism. The connecting rod mechanism is fixedly connected with the cabin door and hinged to the base plate, and the cabin door and the connecting rod mechanism can rotate relative to the base plate. The driving mechanism is fixed on the base plate, is connected with the connecting rod mechanism and drives the cabin door to rotate through the connecting rod mechanism; the cabin door closing position detection device and the cabin door opening position detection device are both fixed to the driving mechanism, the position detection function is achieved when the cabin door is opened and closed, the microswitch is triggered, and the cabin door is opened and closed. The in-place condition of the cabin door can be detected when the cabin door is opened and closed, it is guaranteed that the microswitch is in a non-pressed state for a long time, stress damage is avoided, the sensitivity of the microswitch is kept, and the in-place opening and closing reliability of the cabin door is improved.

Description

Technical Field

[0001] The present invention relates to the field of aerospace vehicles, and particularly to a position detection device for a space hatch opening and closing mechanism. Background Art

[0002] With the progress of space technology, space vehicles such as space stations, spacecrafts, and space shuttles have been fully improved and developed. The hatch mechanism is an important part of the vehicle, undertaking the functions of sealing the space inside the cabin and ensuring the release of relevant payloads. Whether the hatch is opened and closed in place and accurately directly determines the realization of the vehicle's functions. At present, most hatch opening and closing mechanisms adopt the method of pressing microswitches to collect in-place signals and perform motion control. However, in the harsh mechanical environments such as overload, vibration, and shock during the launch stage, the microswitch requires an additional pressing force, which is extremely easy to cause damage and failure; and after the vehicle is in orbit, the hatch remains closed for a long time, resulting in the switch being prone to plastic deformation due to long-term compression, reducing the reliability and affecting the accuracy of the hatch closing in place. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a position detection device for a space hatch opening and closing mechanism.

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

[0005] A position detection device for a space hatch opening and closing mechanism includes a space hatch opening and closing mechanism, a microswitch, a hatch closing position detection device, and a hatch opening position detection device;

[0006] The space hatch opening and closing mechanism includes a hatch, a substrate, a linkage mechanism, and a driving mechanism;

[0007] The linkage mechanism is fixedly connected to the hatch and hinged to the substrate, and the hatch and the linkage mechanism can rotate relative to the substrate;

[0008] The driving mechanism is fixed on the substrate, connected to the linkage mechanism, and drives the hatch to rotate through the linkage mechanism;

[0009] The hatch closing position detection device and the hatch opening position detection device are both fixed on the driving mechanism, realizing the position detection function during the opening and closing of the hatch, triggering the microswitch, and realizing the opening and closing of the hatch.

[0010] The microswitch includes a microswitch for the opening position detection device and a microswitch for the closing position detection device.

[0011] The link mechanism includes a crank, a connecting rod, a hinge, a rocker arm, and a fork; the rocker arm is fixed on the hatch door, articulated with the substrate through the hinge, and can rotate relative to the substrate around the hinge; the crank is connected with the rocker arm through the connecting rod; the fork is installed on the crank and used to trigger the microswitch.

[0012] The drive mechanism includes a planetary reducer and a drive motor;

[0013] The drive motor is fixedly installed on the planetary reducer and outputs torque when the hatch door opening and closing mechanism works;

[0014] The planetary reducer is fixedly installed on the substrate, increases the torque output by the drive motor, enables the output torque to meet the motion requirements, drives the link mechanism to move, and realizes the rotation of the hatch door.

[0015] The hatch door closing position detection device includes a spring pressure plate, a spring support, a closing position detection device mounting seat, a closing position detection device microswitch, a spring sleeve, and a spring;

[0016] The closing position detection device mounting seat is fixedly installed on the planetary reducer;

[0017] The spring support and the closing position detection device microswitch are fixedly installed on the closing position detection device mounting seat;

[0018] The spring pressure plate is articulated on the closing position detection device mounting seat;

[0019] The spring sleeve and the spring can slide within the spring support.

[0020] The closing position detection device microswitch is in the "normally closed" state; when the hatch door is opened, the fork is separated from the spring pressure plate, the spring pushes the spring sleeve to move upward, drives the spring pressure plate to rotate clockwise, presses the closing position detection device microswitch, and at this time the closing position detection device microswitch is not triggered. When the hatch door is closed in place, the fork drives the spring pressure plate to rotate counterclockwise, compresses the spring, and at the same time releases the closing position detection device microswitch, and the internal circuit of the closing position detection device microswitch is conducted and triggered, and the hatch door is closed in place.

[0021] There are two closing position detection device microswitches, and it is effective to touch either one or both of them.

[0022] The hatch door opening position detection device includes an opening position detection device mounting seat, a microswitch reed, and an opening position detection device microswitch;

[0023] The opening position detection device mounting seat is fixedly installed on the planetary reducer;

[0024] The microswitch reed and the microswitch of the opening position detection device are fixedly installed on the mounting seat of the opening position detection device.

[0025] The microswitch of the opening position detection device is in the "normally open" state. When the hatch door is fully opened, the fork presses the microswitch reed, and the internal circuit of the microswitch of the opening position detection device is conducted and triggered, indicating that the hatch door is fully opened.

[0026] There are two microswitches of the opening position detection device, and touching either one or both are effective.

[0027] The schematic diagram of the position detection device of the space hatch door opening and closing mechanism. The switch has three contacts, namely C, NO, and NC. When the microswitch contacts are C and NO, it is in the "normally open" state. Press the microswitch, and it conducts and triggers. When the microswitch contacts are C and NC, it is in the "normally closed" state. Press the microswitch, and the inside does not conduct. Release the microswitch, and it conducts and triggers. The microswitch of the hatch door opening position detection device is in the "normally open" state, and the microswitch of the hatch door closing position detection device is in the "normally closed" state. In the "normally closed" state, without pressing the microswitch, the microswitch is in a non-pressed state, avoiding damage due to force and maintaining the sensitivity of the switch.

[0028] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0029] The present invention can detect the position of the hatch door when it is opened and closed, ensure that the microswitch is in a non-pressed state during the launch stage, avoid damage due to force, maintain the sensitivity of the microswitch, and improve the reliability of the hatch door opening and closing in place. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is an external view of a space hatch door opening and closing mechanism in an embodiment;

[0032] Figure 2 It is a diagram of the opening and closing process of a space hatch door opening and closing mechanism in an embodiment;

[0033] Figure 3 It is a schematic diagram of the microswitch of a space hatch door opening and closing mechanism in an embodiment;

[0034] Figure 4 It is an external view of a space hatch door opening position detection device in an embodiment;

[0035] Figure 5 It is an external view of a space hatch closing position detection device in the embodiment;

[0036] Figure 6 It is a cross-sectional view of a space hatch position detection device in the embodiment.

[0037] Description of the markings in the figure:

[0038] 1 is the hatch; 2 is the substrate; 3 is the space hatch closing position detection device; 4 is the space hatch opening position detection device; 5 is the crank; 6 is the connecting rod; 7 is the reducer; 8 is the driving motor; 9 is the hinge; 10 is the rocker arm; 11 is the mounting seat of the opening position detection device; 12 is the fork; 13 is the micro switch reed; 14 is the micro switch of the opening position detection device; 15 is the spring pressure plate; 16 is the spring support; 17 is the mounting seat of the closing position detection device; 18 is the micro switch of the closing position detection device; 19 is the spring sleeve; 20 is the spring. Specific implementation mode

[0039] The following uses specific specific examples to illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0040] The following combines the appendix Figures 1 - 6 A further detailed description of the present invention is as follows:

[0041] A position detection device for a space hatch opening and closing mechanism, as Figure 1 shown, includes a space hatch opening and closing mechanism, a micro switch, a space hatch closing position detection device 3 and a space hatch opening position detection device 4;

[0042] The space hatch opening and closing mechanism includes a hatch 1, a substrate 2, a connecting rod mechanism and a driving mechanism;

[0043] The connecting rod mechanism is fixedly connected to the hatch 1 and hinged to the substrate 2. The hatch 1 and the connecting rod mechanism can rotate relative to the substrate 2;

[0044] The driving mechanism is fixed on the substrate 2, connected to the connecting rod mechanism, and drives the hatch 1 to rotate through the connecting rod mechanism;

[0045] The space hatch closing position detection device 3 and the space hatch opening position detection device 4 are both fixed on the driving mechanism, realizing the position detection function when the hatch opens and closes, triggering the micro switch, and realizing the opening and closing of the hatch.

[0046] The microswitch includes an opening position detection device microswitch 14 and a closing position detection device microswitch 18.

[0047] As Figure 2 shown, the linkage mechanism includes a crank 5, a connecting rod 6, a hinge 9, a rocker arm 10 and a fork 12; the rocker arm 10 is fixed on the hatch 1, is hinged to the substrate 2 through the hinge 9, and can rotate relative to the substrate 2 around the hinge 9; the crank 5 is connected to the rocker arm 10 through the connecting rod 6; the fork 12 is installed on the crank 5 and is used to trigger the microswitch.

[0048] As Figure 1 shown, the driving mechanism includes a planetary reducer 7 and a driving motor 8;

[0049] The driving motor 8 is fixedly installed on the planetary reducer 7 and outputs torque when the hatch opening and closing mechanism works;

[0050] The planetary reducer 7 is fixedly installed on the substrate 2, increases the torque output by the driving motor 8, enables the output torque to meet the motion requirements, drives the linkage mechanism to move, and realizes the rotation of the hatch 1.

[0051] As Figure 3 and Figure 4 shown, the hatch closing position detection device 3 includes a spring pressure plate 15, a spring support 16, a closing position detection device mounting seat 17, a closing position detection device microswitch 18, a spring sleeve 19 and a spring 20;

[0052] The closing position detection device mounting seat 17 is fixedly installed on the planetary reducer 7;

[0053] The spring support 16 and the closing position detection device microswitch 18 are fixedly installed on the closing position detection device mounting seat 17;

[0054] The spring pressure plate 15 is hinged to the closing position detection device mounting seat 17;

[0055] The spring sleeve 19 and the spring 20 can slide within the spring support 16.

[0056] The closing position detection device microswitch 18 is in the "normally closed" state; when the hatch 1 is opened, the fork 12 is separated from the spring pressure plate 15, the spring 20 pushes the spring sleeve 19 to move upward, drives the spring pressure plate 15 to rotate clockwise, presses the closing position detection device microswitch 18, and at this time the closing position detection device microswitch 18 is not triggered; when the hatch 1 is closed in place, the fork 12 drives the spring pressure plate 15 to rotate counterclockwise, compresses the spring 20, and at the same time releases the closing position detection device microswitch 18, and the internal circuit of the closing position detection device microswitch 18 is conducted and triggered, and the hatch 1 is closed in place.

[0057] There are two micro switches 18 in the closing position detection device, and touching either one or both of them is effective.

[0058] As Figure 5 shown, the hatch opening position detection device 4 includes an opening position detection device mounting seat 11, a micro switch reed 13, and an opening position detection device micro switch 14;

[0059] The opening position detection device mounting seat 11 is fixedly installed on the planetary reducer 7;

[0060] The micro switch reed 13 and the opening position detection device micro switch 14 are fixedly installed on the opening position detection device mounting seat 11.

[0061] The opening position detection device micro switch 14 is in the "normally open" state. When the hatch 1 is opened in place, the fork 12 presses the micro switch reed 13, and the internal circuit of the opening position detection device micro switch 14 is conducted and triggered, and the hatch 1 is opened in place.

[0062] There are two opening position detection device micro switches 14, and touching either one or both of them is effective.

[0063] The principle of the space hatch opening and closing mechanism position detection device is as Figure 6 shown: The switch has three contacts, namely C, NO, and NC. When the micro switch contacts are C and NO, it is in the "normally open" state, and when the micro switch is pressed, it is conducted and triggered; when the micro switch contacts are C and NC, it is in the "normally closed" state, and when the micro switch is pressed, the inside is not conducted, and when the micro switch is released, it is conducted and triggered. The opening position detection device micro switch of the hatch 1 is in the "normally open" state, and the closing position detection device micro switch of the hatch 1 is in the "normally closed" state. In the "normally closed" state, the micro switch is not pressed, and the micro switch is in an uncompressed state, avoiding damage due to force and maintaining the sensitivity of the switch.

[0064] Although the present invention has been disclosed above with preferred embodiments, it is not used to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention without departing from the spirit and scope of the present invention. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A position detection device for a space hatch opening and closing mechanism, characterized in that, It includes a space hatch opening and closing mechanism, a microswitch, a hatch closing position detection device (3), and a hatch opening position detection device (4); The space hatch opening and closing mechanism includes a hatch (1), a base plate (2), a linkage mechanism, and a driving mechanism; The linkage mechanism is fixedly connected to the hatch (1) and hinged to the base plate (2), and the hatch (1) and the linkage mechanism can rotate relative to the base plate (2); The driving mechanism is fixed on the base plate (2), connected to the linkage mechanism, and drives the hatch (1) to rotate through the linkage mechanism; The hatch closing position detection device (3) and the hatch opening position detection device (4) are both fixed on the driving mechanism, realizing the position detection function during the opening and closing of the hatch, triggering the microswitch, and realizing the opening and closing of the hatch.

2. The position detection device for a space hatch opening and closing mechanism according to claim 1, characterized in that The microswitch includes a microswitch for the opening position detection device (14) and a microswitch for the closing position detection device (18).

3. A position detection device for a space hatch opening and closing mechanism according to claim 1, characterized in that, The linkage mechanism includes a crank (5), a connecting rod (6), a hinge (9), a rocker arm (10), and a fork (12); the rocker arm (10) is fixed on the hatch (1), hinged to the base plate (2) through the hinge (9), and can rotate relative to the base plate (2) around the hinge (9); the crank (5) is connected to the rocker arm (10) through the connecting rod (6); the fork (12) is installed on the crank (5) and is used to trigger the microswitch.

4. A position detection device for a space hatch opening and closing mechanism according to claim 1, characterized in that, The driving mechanism includes a planetary reducer (7) and a driving motor (8); The driving motor (8) is fixedly installed on the planetary reducer (7) and outputs torque when the hatch opening and closing mechanism works; The planetary reducer (7) is fixedly installed on the base plate (2), increases the torque output by the driving motor (8), makes the output torque meet the motion requirements, drives the linkage mechanism to move, and realizes the rotation of the hatch (1).

5. The position detection device for the space hatch opening and closing mechanism according to claim 1, characterized in that The hatch closing position detection device (3) includes a spring pressure plate (15), a spring support (16), a closing position detection device mounting seat (17), a closing position detection device microswitch (18), a spring sleeve (19), and a spring (20); The closing position detection device mounting seat (17) is fixedly installed on the planetary reducer (7); The spring support (16) and the closing position detection device microswitch (18) are fixedly installed on the closing position detection device mounting seat (17); The spring pressure plate (15) is hinged on the closing position detection device mounting seat (17); The spring sleeve (19) and the spring (20) can slide within the spring support (16).

6. The position detection device for a space hatch opening and closing mechanism according to claim 5, characterized in that There are two closing position detection device microswitches (18), and touching either one or both are effective.

7. The position detection device for the space hatch opening and closing mechanism according to claim 1, characterized in that The hatch opening position detection device (4) includes an opening position detection device mounting seat (11), a microswitch reed (13), and an opening position detection device microswitch (14); The opening position detection device mounting seat (11) is fixedly installed on the planetary reducer (7); The microswitch reed (13) and the opening position detection device microswitch (14) are fixedly installed on the opening position detection device mounting seat (11).

8. The position detection device for a space hatch opening and closing mechanism according to claim 7, characterized in that, The microswitches (14) of the opening position detection device are two, and touching any one or both of them is effective.

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