A locking mechanism

Abstract

The application provides a locking mechanism for in-orbit calibration locking of an in-flight spectrometer calibration cabin, comprising a locking part and a driving part; the locking part is installed on a calibration cabin cover, and the driving part is installed on an in-flight spectrometer base; when the mechanism performs a locking action, the movement of the cabin cover to a position can be judged by a micro switch, and the in-orbit calibration locking action of the calibration cabin can be completed by a motor and a speed reduction assembly of the driving part driving a rotating shaft and being screwed with a locking nut of the locking part. The locking mechanism has simple structure and control mode and high reliability.

Description

Technical Field

[0001] This invention relates to the field of space exploration technology, and in particular to a locking mechanism for on-orbit calibration locking of an airborne spectrometer calibration cabin. Background Technology

[0002] During flight observation missions, airborne spectrometers require calibration of their optomechanical systems to ensure the effectiveness of data acquisition. Because the flight process is continuous, the calibration must be completed in the air. This necessitates that the equipment, while meeting design requirements, be as simple in structure as possible, and places higher demands on the equipment's control accuracy and reliability. Existing calibration locking mechanisms suffer from insufficient reliability.

[0003] Therefore, those skilled in the art are dedicated to developing a method that relies on the restoring force of a preloaded spring to lock the motor-driven shaft and the locking nut to complete the on-orbit calibration locking action of the airborne spectrometer calibration cabin. This method is simple in structure and highly reliable. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that the original drive is multi-functional, the structure is complex and the reliability is insufficient. The on-orbit calibration locking action of the airborne spectrometer calibration cabin is completed by using the restoring force of the pre-tightened spring to lock the motor drive shaft and the locking nut.

[0005] To achieve the above objectives, the present invention provides an on-orbit locking mechanism for a calibration cabin of an airborne spectrometer, comprising a locking part and a driving part;

[0006] The locking part includes a nut fixing sleeve, a locking nut, a spring limit cover, a preload spring, an upper micro switch, and an upper contact. The bottom of the guide groove inside the nut fixing sleeve is provided with a platform with a through hole. The locking nut, the preload spring, and the spring limit cover are arranged sequentially from bottom to top on the platform. The preload spring pre-locks the locking nut, and the spring limit cover is installed on the top of the nut fixing sleeve through a slot. The nut fixing sleeve is provided with an upper contact and a lower contact around its perimeter. An upper micro switch is installed at the corresponding position of the upper contact.

[0007] The drive unit includes a drive mounting bracket, bearings, spacers, a reducer assembly, a shaft, bearing retaining rings, bearing end caps, a support bracket, and a motor. The reducer assembly and motor are sequentially fixed to the bottom of the drive mounting bracket by bolts. The shaft is mounted inside the drive mounting bracket via bearings. The guide end of the shaft is threaded and can be locked with a lock nut. The bottom of the shaft is connected to the output end of the reducer assembly via a key. Bearing retaining rings and spacers are respectively provided at the top and middle of the bearing for fixing the shaft. A bearing end cap is provided at the top of the drive mounting bracket, and a lower microswitch is provided on the bearing end cap at a position corresponding to the lower contact. A support bracket is bolted to the outside of the drive mounting bracket.

[0008] Furthermore, the upper micro switch is used in conjunction with the upper contact, and the number of such contacts is no less than two pairs.

[0009] Furthermore, the lower micro switch is used in conjunction with the lower contact, and the number of such pairs is no less than two.

[0010] Furthermore, the locking nut can move up and down within a certain range.

[0011] Furthermore, the reducer assembly is a harmonic reducer assembly.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] The on-orbit locking action of the airborne spectrometer calibration cabin is completed by using the restoring force of a pre-tightened spring, which, along with the motor drive shaft and locking nut, achieves the locking action. The structure is simple and highly reliable. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the locking part of the locking mechanism according to an embodiment of the present invention;

[0015] Figure 2 This is a three-dimensional schematic diagram of the driving part of the locking mechanism according to an embodiment of the present invention;

[0016] Figure 3 This is a three-dimensional schematic diagram of the locking mechanism in the locked state according to an embodiment of the present invention;

[0017] Figure 4 yes Figure 1 Top view;

[0018] Figure 5 yes Figure 4 Sectional view along line AA;

[0019] Figure 6 yes Figure 4 Sectional view along line BB. Detailed Implementation

[0020] The present invention is described below with reference to the accompanying drawings to make its technical content clearer and easier to understand.

[0021] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0022] like Figures 1-6 As shown, the on-orbit locking mechanism includes a locking part and a driving part;

[0023] The locking part includes a nut fixing sleeve 1, a locking nut 2, a preload spring 3, a spring limit cover 4, an upper micro switch 5, an upper contact 6, and a lower contact 7. The bottom of the guide groove inside the nut fixing sleeve 1 is provided with a platform with a through hole. The locking nut 2, the preload spring 3, and the spring limit cover 4 are arranged sequentially from bottom to top on the platform. The preload spring 3 pre-locks the locking nut 2. Specifically, the locking nut 2 can move up and down within a certain range. The spring limit cover 4 is installed on the top of the nut fixing sleeve 1 through a slot. The nut fixing sleeve 1 is provided with an upper contact 6 and a lower contact 7 around its perimeter. An upper micro switch 5 is installed at the corresponding position of the upper contact 6. Specifically, the upper micro switch 5 is used in conjunction with the upper contact 6. Preferably, there are no fewer than two pairs of them.

[0024] The drive unit includes a lower micro switch 8, a drive mounting bracket 9, a bearing 10, a spacer 11, a reducer assembly 12, a rotating shaft 13, a bearing retaining ring 14, a bearing end cover 15, a support bracket 16, and a motor 17. The reducer assembly 12 and the motor 17 are sequentially fixed to the bottom of the drive mounting bracket 9 by bolts. The rotating shaft 13 is installed inside the drive mounting bracket 9 through the bearing 10. The guide end of the rotating shaft 13 is threaded and can be connected and locked with the locking nut 2. The bottom of the rotating shaft 13 is connected to the output end of the reducer assembly 12 by a key. The bearing 10 has a bearing retaining ring 14 and a spacer 11 at its top and middle, respectively, for fixing the rotating shaft 13. The top of the drive mounting bracket 9 has a bearing end cover 15, and the bearing end cover 15 has a lower micro switch 8 at a position corresponding to the lower contact 7. Specifically, the lower micro switch 8 is used in conjunction with the lower contact 7. Preferably, there are no fewer than two pairs of them. The drive mounting bracket 9 is externally connected to the support bracket 16 by bolts for connecting the airborne frame.

[0025] Preferably, the reducer assembly 12 is a harmonic reducer assembly.

[0026] The working process of the onboard spectrometer calibration chamber locking mechanism is as follows:

[0027] When the airborne spectrometer deploys into calibration mode and the calibration bay is in place, the calibration locking action begins. At this time, the locking part installed on the calibration bay contacts the drive part of the airborne spectrometer frame, and the lower contact of the locking part contacts the lower micro switch of the drive part, thus initiating the locking action. The motor drives the rotating shaft to rotate through the reducer, and the rotating shaft engages with the locking nut until the upper contact contacts the upper micro switch, at which point the motor stops rotating, the locking action ends, and the on-orbit locking action of the airborne spectrometer calibration bay is completed.

Claims

1. A locking mechanism for locking the calibration chamber of an airborne spectrometer, characterized in that, Includes a locking part and a driving part; The locking part includes a nut fixing sleeve, a locking nut, a spring limit cover, a preload spring, an upper micro switch, and an upper contact. The bottom of the guide groove inside the nut fixing sleeve is provided with a platform with a through hole. The locking nut, the preload spring, and the spring limit cover are arranged sequentially from bottom to top on the platform. The preload spring pre-locks the locking nut, and the spring limit cover is installed on the top of the nut fixing sleeve through a slot. The nut fixing sleeve is provided with an upper contact and a lower contact around its perimeter. An upper micro switch is installed at the corresponding position of the upper contact. The drive unit includes a drive mounting bracket, bearings, spacers, a reducer assembly, a rotating shaft, bearing retaining rings, bearing end caps, a support bracket, and a motor. The reducer assembly and motor are sequentially fixed to the bottom of the drive mounting bracket by bolts. The rotating shaft is mounted inside the drive mounting bracket via bearings. The guide end of the rotating shaft is threaded and can be locked with a lock nut. The bottom of the rotating shaft is connected to the output end of the reducer assembly by bolts. Bearing retaining rings and spacers are respectively provided at the top and middle of the bearing for fixing the rotating shaft. A bearing end cap is provided at the top of the drive mounting bracket, and a lower microswitch is provided on the bearing end cap at a position corresponding to the lower contact. A support bracket is bolted to the outside of the drive mounting bracket.

2. The locking mechanism as described in claim 1, characterized in that, The upper micro switch is used in conjunction with the upper contact, and there are no fewer than two pairs of them.

3. A locking mechanism as described in claim 1, characterized in that, The lower micro switch is used in conjunction with the lower contact, and there are no fewer than two pairs of them.

4. A locking mechanism as described in claim 1, characterized in that, The locking nut can move up and down within a certain range.

5. A locking mechanism as described in claim 1, characterized in that, The reducer assembly is a harmonic reducer assembly.

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