Screw drive protection device for large-view-field window of infrared scanning imager
By designing a large field of view window spiral transmission protection device for infrared scanning imagers, the problem of reducing imaging quality of the equipment under wind, sand and dust pollution is solved, automated protection is achieved, and the reliability and maintenance simplicity of the equipment are improved. .
Patent Information
- Application Number
- CN202421390530.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-18
AI Technical Summary
When existing infrared scanning imagers are contaminated by wind, sand and dust in large field of view windows, the imaging quality of the equipment is reduced, and it is difficult to effectively protect the window in all occasions by manually wiping or manually covering the window.
A large field of view window spiral transmission protection device of infrared scanning imager is designed, using a bottom plate transmission mechanism, left protection baffle, right protection baffle and upper cover plate. The spiral transmission mechanism is driven by an automatic control of the motor to realize automatic protection of the window. .
The device can self-lock in a high vibration environment, ensuring that the window is effectively protected when it is not working, improving imaging quality, simplifying maintenance processes, and reducing costs.
Smart Images
Figure CN222528780U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of infrared scanning imagers, in particular to a spiral transmission protection device for a large-viewing-field window of an infrared scanning imager. Background Art
[0002] The infrared scanning imager is an infrared imaging device installed on a vehicle, ship, aircraft or fixed platform, which has the functions of scanning imaging in pitch direction and rotation imaging in azimuth direction. The infrared scanning imager performs pitch scanning through a large field of view infrared window. Generally, the large field of view window has a large area. When the large field of view window is contaminated by wind, sand and dust, the infrared imaging quality of the equipment will be reduced.
[0003] At present, infrared scanning imagers generally adopt manual wiping or manual window cover to prevent contamination by wind, sand and dust. Frequent manual wiping can easily cause damage to the window coating layer, and it is difficult to protect the window when the equipment is not working in some occasions where manual intervention is impossible. When the window is contaminated by wind, sand and dust, the performance of the infrared scanning imager will be greatly reduced. Therefore, improvements need to be made to the existing problems. Utility Model Content
[0004] In view of the above situation, in order to overcome the current technical defects, the utility model provides a spiral transmission protection device for a large field of view window of an infrared scanning imager with a compact structure, a large protection area, simple control and low cost. The device is suitable for various infrared scanning imagers to protect the infrared window with a large field of view. The device has simple processing, low structural complexity, a high degree of automation and can achieve self-locking in a high vibration environment. The device is more suitable for mature market use and scientific research use, and meets the needs of automatic protection of the large field of view window of the infrared scanning imager.
[0005] The technical scheme adopted by the utility model is as follows: the spiral transmission protection device of the large field window of the infrared scanning imager proposed in this scheme includes a bottom plate transmission mechanism, a left protection baffle, a right protection baffle and an upper cover plate, and the bottom plate transmission mechanism includes a bottom plate, a front side plate, a rear side plate, a left side plate, a right side plate, a front slider linear guide, a rear slider linear guide, a left slider linear guide, a right slider linear guide, a motor seat, a stepper motor, a pinion support seat, a transmission gear, a left screw support seat, a right screw support seat, a transmission screw, a left transmission nut and a right transmission nut, and its structure is: the bottom plate is a rectangular structure, and there are mounting bosses and mounting holes on the left and right sides of the bottom plate, and a square light-through hole is processed in the middle of the bottom plate; the front side plate is fixedly mounted on the bottom by screws On the upper end surface of the front side of the plate, the rear side plate is fixedly mounted on the upper end surface of the rear side of the base plate by screws, the left side plate is fixedly mounted on the upper end surface of the left side of the base plate by screws, and the right side plate is fixedly mounted on the upper end surface of the right side of the base plate by screws; a left side plate magnetic strip is fixedly mounted in the left groove of the left side plate by gluing, and a right side plate magnetic strip is fixedly mounted in the right groove of the right side plate by gluing; the front slider linear guide is fixedly mounted on the front upper end surface of the base plate by screws, and the front slider linear guide is mounted behind the front side plate 1; the rear slider linear guide is fixedly mounted on the rear upper end surface of the base plate by screws, and the rear slider linear guide is mounted in front of the rear side plate; the left slider linear guide is fixedly mounted on the left upper end of the base plate by screws On the surface, the left slider linear guide is installed in front of the rear slider linear guide; the right slider linear guide is fixedly installed on the upper end surface of the right part of the base plate by screws, and the right slider linear guide is installed in front of the rear slider linear guide 1; the motor seat is fixedly installed behind the square light-through hole on the upper end surface of the base plate by screws, and the motor seat is installed in the middle position between the left slider linear guide and the right slider linear guide, and the stepper motor is fixedly connected to the motor seat by screws; the center hole of the pinion support seat is provided with a deep groove ball bearing, and the pinion support seat is fixedly connected to the base plate by screws, and the pinion support seat is installed on the left side of the motor seat; the transmission gear is composed of a small gear and a large gear meshing with each other, The left end of the pinion of the transmission gear is installed in the inner ring of the deep groove ball bearing of the pinion support seat through a shaft sleeve, and the center hole of the pinion of the transmission gear is fixedly connected to the output shaft of the stepper motor through a set screw and a flat key; the center hole of the left screw rod support seat is provided with a deep groove ball bearing, and the left screw rod support seat is fixedly installed on the left side of the upper end surface of the base plate by screws, and the left screw rod support seat is installed in the middle position between the rear slider linear guide and the left slider linear guide; the center hole of the right screw rod support seat is provided with a deep groove ball bearing, and the right screw rod support seat is fixedly installed on the right side of the upper end surface of the base plate by screws, and the right screw rod support seat is installed in the middle position between the rear slider linear guide 1- and the right slider linear guide;The left part of the transmission screw is a left-handed transmission thread, and the right part of the transmission screw is a right-handed transmission thread. The left end of the transmission screw is installed in the inner ring of the deep groove ball bearing of the left screw support seat through a shaft sleeve, and the right end of the transmission screw is installed in the inner ring of the deep groove ball bearing of the right screw support seat through a shaft sleeve. The large gear of the transmission gear is fixedly sleeved on the installation shaft in the middle part of the transmission screw through a set screw and a flat key; the left transmission nut is sleeved on the left-handed transmission thread of the left part of the transmission screw, and is installed so that the left transmission nut hole thread is meshed with the left-handed transmission thread of the transmission screw; the right transmission nut is sleeved on the right-handed transmission thread of the transmission screw, and is installed so that the right transmission nut hole thread is meshed with the right-handed transmission thread of the transmission screw. ;
[0006] The left protective baffle and the right protective baffle are both rectangular structures; the left magnetic strip of the left baffle is fixedly installed on the left side of the lower end surface of the left protective baffle by screws, and the right magnetic strip of the left baffle is fixedly installed on the right side of the lower end surface of the left protective baffle by screws, and a groove is processed on the right side surface of the left protective baffle; the left magnetic strip of the right baffle is fixedly installed on the left side of the lower end surface of the right protective baffle by screws, and the right magnetic strip of the right baffle is fixedly installed on the right side of the lower end surface of the right protective baffle by screws, and a boss is processed on the left side surface of the right protective baffle.
[0007] The lower end surface of the left protective baffle is fixedly connected to the left slider of the front slider linear guide, the left slider of the rear slider linear guide, the slider of the left slider linear guide and the left transmission nut of the base plate transmission mechanism by screws, and the lower end surface of the right protective baffle is fixedly connected to the right slider of the front slider linear guide, the right slider of the rear slider linear guide, the slider of the right slider linear guide and the right transmission nut of the base plate transmission mechanism by screws; the upper cover plate is a rectangular structure, and a square light-through hole is processed in the middle of the upper cover plate. The lower end surface of the upper cover plate is fixedly connected to the front side plate, the rear side plate, the left side plate and the right side plate of the base plate transmission mechanism by screws.
[0008] The beneficial effects achieved by the utility model using the above structure are as follows: The spiral transmission protection device for the large field of view window of the infrared scanning imager of this scheme has the following advantages: the invention has a reasonable, simple, compact structure, high reliability, large protection area, easy manufacturing, and simple installation. It uses motor automation control to drive a forward spiral transmission mechanism and a reverse spiral transmission mechanism to control the opening and closing of the infrared window protection baffle. The volume is reduced by gear transmission, the magnetic positioning of the device makes the function reliable, and the linear guide guide function of the slider makes the device move smoothly and the friction is small. Since the spiral transmission can realize the self-locking of the device in a complex vibration environment, the device has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0010] Figure 1 This is a schematic diagram of the overall structure of this scheme;
[0011] Figure 2 This is a schematic diagram of the overall structure of the protection baffle of this solution in an open state;
[0012] Figure 3 It is a structural schematic diagram of the bottom plate transmission mechanism of this scheme;
[0013] Figure 4 This is a schematic diagram of the structure of the left protective baffle of this solution;
[0014] Figure 5 This is a schematic diagram of the structure of the right protective baffle of this solution.
[0015] Among them, 1. Bottom plate transmission mechanism, 2. Left protective baffle, 3. Right protective baffle, 4. Upper cover plate, 1-2. Front side plate, 1-3. Rear side plate, 1-4. Left side plate, 1-5. Right side plate, 1-6. Front slider linear guide, 1-7. Rear slider linear guide, 1-8. Left slider linear guide, 1-9. Right slider linear guide, 1-10. Motor seat, 1-11. Stepper motor, 1-12. Pinion support seat, 1-13. Transmission gear, 1-14. Left screw support seat, 1-15. Right screw support seat, 1-16. Transmission screw, 1-17. Left transmission nut, 1-18. Right transmission nut. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0017] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.
[0018] The technical solution adopted by the utility model is as follows: Figure 1 and Figure 2The spiral transmission protection device for the large field window of the infrared scanning imager comprises a bottom plate transmission mechanism 1, a left protection baffle 2, a right protection baffle 3, and an upper cover plate 4; the characteristics are:
[0019] See also Figure 3The bottom plate transmission mechanism 1 includes a bottom plate 1-1, a front side plate 1-2, a rear side plate 1-3, a left side plate 1-4, a right side plate 1-5, a front slider linear guide 1-6, a rear slider linear guide 1-7, a left slider linear guide 1-8, a right slider linear guide 1-9, a motor seat 1-10, a stepper motor 1-11, a pinion support seat 1-12, a transmission gear 1-13, a left screw support seat 1-14, a right screw support seat 1-15, a transmission screw 1-16, a left transmission nut 1-17, and a right transmission nut 1-18; its structure is as follows: the bottom plate 1-1 is a rectangular structure, with mounting bosses and mounting holes on the left and right sides, and a square light hole is processed in the middle of the bottom plate 1-1; the front side plate 1-2 is fixedly mounted on the upper end surface of the front side of the bottom plate 1-1 by screws The rear side plate 1-3 is fixedly installed on the upper end surface of the rear side of the bottom plate 1-1 by screws, the left side plate 1-4 is fixedly installed on the upper end surface of the left side of the bottom plate 1-1 by screws, and the right side plate 1-5 is fixedly installed on the upper end surface of the right side of the bottom plate 1-1 by screws; the left side plate 1-4 is fixedly installed with a left plate magnetic strip in the left groove by gluing, and the right side plate 1-5 is fixedly installed with a right plate magnetic strip in the right groove by gluing; the front slider linear guide 1-6 adopts the SSE2BV-MX13-295 of Japan MISUMI Company, the front slider linear guide 1-6 is fixedly installed on the front upper end surface of the bottom plate 1-1 by screws, and the front slider linear guide 1-6 is installed behind the front side plate 1-2; the rear slider linear guide 1-7 adopts the SSE2BV-MX13-295 of Japan MISUMI Company SSE2BV-MX13-295, the rear slider linear guide 1-7 is fixedly mounted on the upper end surface of the rear of the base plate 1-1 by screws, and the rear slider linear guide 1-7 is installed in front of the rear side plate 1-3; the left slider linear guide 1-8 adopts the SSEBV-MX13-120 of Japan MISUMI Company, the left slider linear guide 1-8 is fixedly mounted on the upper end surface of the left part of the base plate 1-1 by screws, and the left slider linear guide 1-8 is installed in front of the rear slider linear guide 1-7; the right slider linear guide 1-9 adopts the SSEBV-MX13-120 of Japan MISUMI Company, the right slider linear guide 1-9 is fixedly mounted on the upper end surface of the right part of the base plate 1-1 by screws, and the right slider linear guide 1-9 is installed In front of the rear slider linear guide 1-7; the motor seat 1-10 is fixedly installed behind the square light hole on the upper end face of the base plate 1-1 by screws, and the motor seat 1-10 is installed in the middle position of the left slider linear guide 1-8 and the right slider linear guide 1-9. The stepper motor 1-11 adopts KH4254-B95101 of Japan's NIDEC company, and the stepper motor 1-11 is fixedly connected to the motor seat 1-10 by screws; the center hole of the pinion support seat 1-12 is equipped with a deep groove ball bearing, and the center deep groove ball bearing of the pinion support seat 1-12 adopts B6001VV of Japan's MISUMI company. The pinion support seat 1-12 is fixedly connected to the base plate 1-1 by screws, and the pinion support seat 1-12 is installed on the left side of the motor seat 1-10;The transmission gear 1-13 is composed of a small gear and a large gear meshing with each other. The left end mounting shaft sleeve of the small gear of the transmission gear 1-13 is installed in the inner ring of the deep groove ball bearing of the small gear support seat 1-12. The center hole of the small gear of the transmission gear 1-13 is fixedly connected to the output shaft of the stepper motor 1-11 by a set screw and a flat key; the center hole of the left screw support seat 1-14 is equipped with a deep groove ball bearing, and the center deep groove ball bearing of the left screw support seat 1-14 adopts SUB6201ZZ of Japan MISUMI Company. The left screw support seat 1-14 is fixedly installed on the left side of the upper end surface of the base plate 1-1 by screws, and the left screw support seat 1-14 is installed in the middle position between the rear slider linear guide 1-7 and the left slider linear guide 1-8; the center hole of the right screw support seat 1-15 is equipped with a deep groove ball bearing, and the center deep groove ball bearing of the right screw support seat 1-15 adopts SUB6201ZZ of Japan MISUMI Company. The right screw support seat 1-15 is fixedly installed on the base plate by screws On the right side of the upper end face of 1-1, the right screw support seat 1-15 is installed in the middle position between the rear slider linear guide 1-7 and the right slider linear guide 1-9; the left part of the transmission screw 1-16 is a left-handed transmission thread, and the right part is a right-handed transmission thread. The left end of the transmission screw 1-16 is installed in the inner ring of the deep groove ball bearing of the left screw support seat 1-14, and the right end of the transmission screw 1-16 is installed in the inner ring of the deep groove ball bearing of the right screw support seat 1-15. The large transmission gear 1-13 The gear is fixed on the middle mounting shaft of the transmission screw 1-16 by means of a set screw and a flat key; the left transmission nut 1-17 is mounted on the left-handed transmission thread on the left side of the transmission screw 1-16, and is installed so that the left transmission nut 1-17 hole thread is meshed with the left-handed transmission thread of the transmission screw 1-16; the right transmission nut 1-18 is mounted on the right-handed transmission thread on the right side of the transmission screw 1-16, and is installed so that the right transmission nut 1-18 hole thread is meshed with the right-handed transmission thread of the transmission screw 1-16. ;
[0020] See also Figure 4 and Figure 5 , the left protective baffle 2 and the right protective baffle 3 are both rectangular structures; the left magnetic strip of the left baffle is fixedly installed on the left side of the lower end surface of the left protective baffle 2 by screws, and the right magnetic strip of the left baffle is fixedly installed on the right side of the lower end surface of the left protective baffle 2 by screws, and a groove is processed on the right side surface of the left protective baffle 2; the left magnetic strip of the right baffle is fixedly installed on the left side of the lower end surface of the right protective baffle 3 by screws, and the right magnetic strip of the right baffle is fixedly installed on the right side of the lower end surface of the right protective baffle 3 by screws, and a boss is processed on the left side surface of the right protective baffle 3.
[0021] The lower end surface of the left protective baffle 2 is fixedly connected with the left slider of the front slider linear guide 1-6, the left slider of the rear slider linear guide 1-7, the slider of the left slider linear guide 1-8, and the left transmission nut 1-17 of the base plate transmission mechanism 1 by screws, and the lower end surface of the right protective baffle 3 is fixedly connected with the right slider of the front slider linear guide 1-6, the right slider of the rear slider linear guide 1-7, the slider of the right slider linear guide 1-9, and the right transmission nut 1-18 of the base plate transmission mechanism 1 by screws; the upper cover plate 4 is a rectangular structure, and a square light-through hole is processed in the middle of the upper cover plate 4. The lower end surface of the upper cover plate 4 is fixedly connected with the front side plate 1-2, the rear side plate 1-3, the left side plate 1-4, and the right side plate 1-5 of the base plate transmission mechanism 1 by screws.
[0022] The action flow of the embodiment is as follows: the spiral transmission protection device of the large field of view window of the infrared scanning imager is fixed in front of the large field of view window of the infrared scanning imager by screws, and the stepper motor 1-11 is started to make the output shaft of the stepper motor 1-11 rotate forward, and the meshing transmission of the large gear and the small gear of the transmission gear 1-13, the meshing transmission of the left-handed transmission thread of the transmission screw 1-16 and the left transmission nut 1-17, and the meshing transmission of the right-handed transmission thread of the transmission screw 1-16 and the right transmission nut 1-18, the left protection baffle 2 and the right protection baffle 3 are connected through the front slider The linear guide 1-6, the rear slider linear guide 1-7, the left slider linear guide 1-8, and the right slider linear guide 1-9 are guided by the sliding friction movement and move away from the opening in the opposite direction. After the left plate 1-4 and the right plate 1-5 move to the limit position through the limiting action, the left magnetic strip of the left baffle 2 is magnetically adsorbed to the left plate 1-4, the right magnetic strip of the right baffle 3 is magnetically adsorbed to the right plate 1-5, and the left protective baffle 2 and the right protective baffle 3 are positioned in the left and right directions, realizing a large field of view of the infrared scanning imager. The window spiral transmission protection device opens and the infrared scanning imager can start working; the stepper motor 1-11 is started to make the output shaft of the stepper motor 1-11 rotate in the opposite direction, through the meshing transmission of the large gear and the small gear of the transmission gear 1-13, the meshing transmission of the left-handed transmission thread of the transmission screw 1-16 and the left transmission nut 1-17, and the meshing transmission of the right-handed transmission thread of the transmission screw 1-16 and the right transmission nut 1-18, the left protection baffle 2 and the right protection baffle 3 are connected through the front slider linear guide 1-6, the rear slider linear guide 1-7, and the left slider linear guide. Under the guidance of the sliding friction movement of the guide rail 1-8 and the right slider linear guide rail 1-9, they move in the opposite direction towards closing. When the left protective baffle 2 contacts the side of the right protective baffle 3, the left side boss of the right protective baffle 3 extends into the right side groove of the left protective baffle 2, and the right magnetic strip of the left baffle of the left protective baffle 2 and the left magnetic strip of the right baffle of the right protective baffle 3 are magnetically adsorbed to position the left protective baffle 2 and the right protective baffle 3 in the left and right directions, thereby realizing the closing movement of the spiral transmission protection device of the large field of view window of the infrared scanning imager, and protecting the window of the infrared scanning imager when it is not working.
[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, material or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, material or apparatus.
[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A spiral transmission protection device for a large field of view window of an infrared scanning imager, comprising a bottom plate transmission mechanism (1), a left protection baffle (2), a right protection baffle (3) and an upper cover plate (4), characterized in that: The base plate transmission mechanism (1) comprises a base plate (1-1), a front side plate (1-2), a rear side plate (1-3), a left side plate (1-4), a right side plate (1-5), a front slider linear guide rail (1-6), a rear slider linear guide rail (1-7), a left slider linear guide rail (1-8), a right slider linear guide rail (1-9), a motor seat (1-10), a stepping motor (1-11), a pinion support seat (1-12), a transmission gear (1-13), a left screw support seat (1-14), a right screw support seat (1-15), a transmission screw (1-16), a left transmission nut (1-17) and a right transmission nut (1-18). The base plate (1-1) is a rectangular structure. There are mounting bosses and mounting holes on the left and right sides, and a square light-through hole is processed in the middle of the bottom plate (1-1); the front side plate (1-2) is fixedly mounted on the front upper end surface of the bottom plate (1-1) by screws, the rear side plate (1-3) is fixedly mounted on the rear upper end surface of the bottom plate (1-1) by screws, the left side plate (1-4) is fixedly mounted on the left upper end surface of the bottom plate (1-1) by screws, and the right side plate (1-5) is fixedly mounted on the right upper end surface of the bottom plate (1-1) by screws; the left side plate (1-4) is fixedly mounted with a left side plate magnetic strip in the left groove by gluing, and the right side plate (1-5) is fixedly mounted with a right side plate magnetic strip in the right groove by gluing; the front slider is straight The linear guide rail (1-6) is fixedly mounted on the front upper end surface of the base plate (1-1) by screws, and the front slider linear guide rail (1-6) is mounted behind the front side plate (1-2); the rear slider linear guide rail (1-7) is fixedly mounted on the rear upper end surface of the base plate (1-1) by screws, and the rear slider linear guide rail (1-7) is mounted in front of the rear side plate (1-3); the left slider linear guide rail (1-8) is fixedly mounted on the left upper end surface of the base plate (1-1) by screws, and the left slider linear guide rail (1-8) is mounted in front of the rear slider linear guide rail (1-7); the right slider linear guide rail (1-9) is fixedly mounted on the right upper end surface of the base plate (1-1) by screws, and the The right slider linear guide (1-9) is installed in front of the rear slider linear guide (1-7); the motor seat (1-10) is fixedly installed behind the square light-through hole on the upper end surface of the base plate (1-1) by screws, the motor seat (1-10) is installed in the middle position between the left slider linear guide (1-8) and the right slider linear guide (1-9), and the stepper motor (1-11) is fixedly connected to the motor seat (1-10) by screws; the center hole of the pinion support seat (1-12) is provided with a deep groove ball bearing, the pinion support seat (1-12) is fixedly connected to the base plate (1-1) by screws, and the pinion support seat (1-12) is installed on the left side of the motor seat (1-10);The transmission gear (1-13) is composed of a small gear and a large gear meshing with each other. The left end of the small gear of the transmission gear (1-13) is installed in the inner ring of the deep groove ball bearing of the small gear support seat (1-12) through a shaft sleeve. The center hole of the small gear of the transmission gear (1-13) is fixedly connected to the output shaft of the stepper motor (1-11) through a set screw and a flat key. The center hole of the left screw support seat (1-14) is sleeved with a deep groove ball bearing. The left screw support seat (1-14) is The left screw support seat (1-14) is fixedly mounted on the left side of the upper end surface of the base plate (1-1) by screws, and is installed in the middle position between the rear slider linear guide rail (1-7) and the left slider linear guide rail (1-8); the center hole of the right screw support seat (1-15) is sleeved with a deep groove ball bearing, and the right screw support seat (1-15) is fixedly mounted on the right side of the upper end surface of the base plate (1-1) by screws, and the right screw support seat (1-15) is installed in the middle position between the rear slider linear guide rail (1-7) and the right slider linear guide rail (1-9) in the middle position; the left part of the transmission screw (1-16) is a left-handed transmission thread, and the right part is a right-handed transmission thread; the left end of the transmission screw (1-16) is installed in the inner ring of the deep groove ball bearing of the left screw support seat (1-14) through a shaft sleeve, and the right end of the transmission screw (1-16) is installed in the inner ring of the deep groove ball bearing of the right screw support seat (1-15) through a shaft sleeve; the large gear of the transmission gear (1-13) is fixedly sleeved on the transmission screw (1-14) through a set screw and a flat key. 16) is installed on the middle installation shaft; the left transmission nut (1-17) is sleeved on the left-handed transmission thread of the left part of the transmission screw (1-16), and is installed so that the hole thread of the left transmission nut (1-17) is meshed with the left-handed transmission thread of the transmission screw (1-16); the right transmission nut (1-18) is sleeved on the right-handed transmission thread of the right part of the transmission screw (1-16), and is installed so that the hole thread of the right transmission nut (1-18) is meshed with the right-handed transmission thread of the transmission screw (1-16). ; 2. According to claim 1, a spiral transmission protection device for a large field of view window of an infrared scanning imager, characterized in that: The left protective baffle (2) and the right protective baffle (3) are both rectangular structures; the left magnetic strip of the left baffle is fixedly installed on the left side of the lower end surface of the left protective baffle (2) by screws, and the right magnetic strip of the left baffle is fixedly installed on the right side of the lower end surface of the left protective baffle (2) by screws, and a groove is processed on the right side surface of the left protective baffle (2); the left magnetic strip of the right baffle is fixedly installed on the left side of the lower end surface of the right protective baffle (3) by screws, and the right magnetic strip of the right baffle is fixedly installed on the right side of the lower end surface of the right protective baffle (3) by screws, and a boss is processed on the left side surface of the right protective baffle (3).
3. According to claim 2, a spiral transmission protection device for a large field of view window of an infrared scanning imager, characterized in that: The lower end surface of the left protective baffle (2) is fixedly connected to the left slider of the front slider linear guide (1-6), the left slider of the rear slider linear guide (1-7), the slider of the left slider linear guide (1-8) and the left transmission nut (1-17) of the base plate transmission mechanism (1) through screws; the lower end surface of the right protective baffle (3) is fixedly connected to the right slider of the front slider linear guide (1-6), the right slider of the rear slider linear guide (1-7), the slider of the right slider linear guide (1-9) and the right transmission nut (1-18) of the base plate transmission mechanism (1) through screws; the upper cover plate (4) is a rectangular structure, a square light-through hole of the cover plate is processed in the middle of the upper cover plate (4), and the lower end surface of the upper cover plate (4) is fixedly connected to the front side plate (1-2), the rear side plate (1-3), the left side plate (1-4) and the right side plate (1-5) of the base plate transmission mechanism (1) through screws.