A single-point fixed, light, small, and wide-range downward viewing angle adjustable mechanism

Abstract

The present invention relates to a light and small-sized mechanism with a large range of downward viewing angle adjustment fixed at a single point, which is mainly composed of a hanging arm, a stud, a large nut, a pitch axis, a pitch bearing, a guide head mounting ring, an L-shaped inertial navigation mounting plate, a set screw, etc. The mechanism can be connected to a flying platform through a stud and a large nut, and two anti-loosening methods are simultaneously adopted to prevent the large nut from loosening, thereby ensuring flight safety; the guide head mounting ring and the L-shaped inertial navigation mounting plate are fixed to the hanging arm by using a pitch bearing and a pitch axis, and the angle can be adjusted by twisting the guide head mounting ring and fixing it to the hanging arm with the set screw. The mechanism adopts a single-point fixing method to greatly reduce its own weight, and is convenient for installation on different flying platforms, such as unmanned aerial vehicles, helicopters, and fixed-wing aircraft; the mechanism can achieve pitch adjustment of +10° to ‑120° by adjusting the fixed position of the set screw.

Description

Technical Field

[0001] The invention belongs to the field of aerospace technology, and specifically relates to a single-point fixed, light, small, and wide-range downward viewing angle adjustable mechanism, which is particularly suitable for installation on helicopters and drones of general aviation. Background Art

[0002] Precision-guided weapons have become an important means of destruction in information warfare, and the seeker is the core component of precision-guided weapons. As the development cycle shortens, many performance characteristics of the seeker are verified through flight tests.

[0003] Most of the existing hanging flying mechanisms are fixed and non-adjustable, and are only suitable for specific products; a small number of adjustable hanging flying mechanisms are mainly height-adjustable mechanisms to meet the mounting requirements of different aircraft; there are also pitch-adjustable structures, but the adjustment angle range is no more than 40°, and the installation weight is large and the installation is time-consuming.

[0004] For radar seekers, the signal-to-noise ratio at different ground-rubbing angles has a huge impact on the performance of the radar seeker, while the pitch angle range of the seeker position marker cannot verify the large ground-rubbing angle required by the test, and the general aviation aircraft carried in the flight cannot expand this angle. A single-point fixed, lightweight, large-range downward viewing angle adjustable mechanism is an effective solution. Summary of the invention

[0005] Technical issues to be solved

[0006] In order to avoid the shortcomings of the prior art, the present invention provides a small, lightweight and wide-range downward viewing angle adjustable mechanism that is fixed at a single point.

[0007] Technical Solution

[0008] A single-point fixed, light and small-sized, large-range downward viewing angle adjustable mechanism, characterized in that it includes a hanging arm, a stud, a large nut, a pitch bearing, a guide head mounting ring, an L-shaped inertial navigation mounting plate, a set screw, a set screw seat, a first pitch half-axis, a second pitch half-axis, and a pitch bearing; the upper end of the hanging arm is fixed to the hanging interface component by the stud and the large nut, and the lower end is provided with a bearing hole for mounting the pitch bearing; the first pitch half-axis and the second pitch half-axis are respectively fixed together from both sides of the pitch bearing; the guide head mounting ring is mounted on the second pitch half-axis; the L-shaped inertial navigation mounting plate is mounted on the first pitch half-axis; the set screw seat is mounted on the lower side of the L-shaped inertial navigation mounting plate; after the guide head mounting ring is turned to the required angle, the set screw is fixed to the hanging arm through the set screw seat to achieve angle adjustment.

[0009] A further technical solution of the present invention includes a GPS antenna, a first data link antenna, and a second data link antenna, and the three antennas are all fixed on the hanging arm.

[0010] A further technical solution of the present invention is that the upper and lower ends of the stud are both provided with latch slots, and the middle is a positioning plane.

[0011] A further technical solution of the present invention is as follows: an anti-loosening screw hole is provided at the upper end of the large nut, and a slot is provided on one side close to the anti-loosening screw hole.

[0012] A further technical solution of the present invention is as follows: the first pitch semi-axis is a circular ring structure, one side of which is provided with a screw hole connected to the L-shaped inertial navigation mounting plate, and the other side of which is provided with a threaded hole connected to the second pitch semi-axis.

[0013] A further technical solution of the present invention is that the upper and lower ends of the second pitch semi-axis are provided with screw holes connected to the guide head mounting ring, the axial direction of the screw hole is vertical, and a circular hole with an axial direction in the horizontal direction is provided in the middle, and a screw hole connected to the first pitch semi-axis is provided on the circular hole.

[0014] A further technical solution of the present invention is as follows: two parallel bosses are provided on the outer side of the seeker mounting ring, screw holes for mounting in cooperation with the second pitch semi-axis are provided on the bosses, and the inside of the ring is used for mounting the seeker.

[0015] A further technical solution of the present invention is as follows: the L-shaped inertial navigation installation plate is L-shaped, a through hole is provided on the vertical surface, a threaded hole matching the first pitch semi-axis is provided on the through hole, and the horizontal surface is used to place the inertial navigation.

[0016] A further technical solution of the present invention is as follows: 13 threaded holes are arranged at intervals of 10° on the hanging arm as fixing holes for set screws.

[0017] A further technical solution of the present invention is that the pitch bearing is installed in the bearing hole of the suspension arm, the axial clearance of the bearing is controlled by adjusting the washer, and then the bearing end cover is used to limit and fix it.

[0018] Beneficial Effects

[0019] The present invention provides a single-point fixed, light and small-sized mechanism with a wide range of downward viewing angle adjustment, which can be equipped with a variety of flight platforms and used to verify the characteristics of the seeker against the ground, sea and other targets. In particular, the downward viewing angle of the radar seeker is expanded to verify the influence of the signal-to-clutter ratio on the performance of the seeker at a larger ground-grazing angle.

[0020] The mechanism can be connected to the flying platform through a stud and a large nut, and two anti-loosening methods are used to prevent the large nut from loosening to ensure flight safety; the mechanism adopts a single-point fixing method to greatly reduce its own weight, which is convenient for installation on different flying platforms, such as drones, helicopters and fixed-wing aircraft; the mechanism can achieve pitch adjustment of +10° to -120° by adjusting the fixing position of the set screw, and the downward viewing angle has a large adjustment range. The manual mechanism can be adjusted every 10°, which is easy to adjust, simple to install, light weight, safe and reliable. It can be installed on different flying platforms and has strong versatility.

[0021] The details are as follows:

[0022] 1. The hanging arm can be connected to the hanging platform through a stud and a large nut, which greatly simplifies the connection method, improves the connection efficiency and reduces the connection difficulty.

[0023] 2. The connection between the hanging arm and the flying platform adopts two anti-loosening methods to prevent the large nut from loosening, ensuring the safety of product flight.

[0024] 3. The single-point fixing method greatly reduces its own weight, making it easy to install on different flying platforms, such as drones, helicopters and fixed-wing aircraft.

[0025] 4. By adjusting the fixing position of the set screw of the pitch dimension, the pitch can be adjusted from +10° to -120°.

[0026] 5. The pitch bearing is supported by a cross roller bearing to achieve high rigidity of the mechanism and can withstand radial load, axial load and overturning moment at the same time.

[0027] 6. The seeker mounting ring and the L-shaped inertial navigation mounting plate are coaxially mounted on both sides of the hanging arm, which ensures the accuracy of inertial navigation measurement and helps balance the bearing load. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0029] Figure 1 Structural diagram of the present invention: (a) front view; (b) side view;

[0030] Figure 2 Large nut structure diagram;

[0031] Figure 3 Double-ended stud structure diagram;

[0032] Figure 4 A partial enlarged view of the set screw seat;

[0033] Figure 5Three-dimensional views: (a) front view; (b) back view;

[0034] Figure 6 Installation diagram of the present invention: (a) front view; (b) cross-sectional view;

[0035] Figure 7 Exploded diagram of the pitch axis installation.

[0036] Among them: 1-first data link antenna; 2-GPS antenna; 3-seeker mounting ring; 4-flying interface component (belonging to the flying platform); 5-first latch; 6-first anti-loosening screw; 7-first large nut; 8-inertial navigation; 9-stud; 10-hanging arm; 11-second large nut; 12-second anti-loosening screw; 13-second latch; 14-second data link antenna; 15-fastening screw; 16-fastening screw seat; 17-L-type inertial navigation mounting plate; 18-GPS antenna bracket; 19-first pitch semi-axis; 20-pitch bearing; 21-bearing pressure plate; 22-second pitch semi-axis; 23-data link antenna bracket; 24-seeker; 25-first screw; 26-second screw; 27-third screw; 28-fourth screw. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] The invention provides a single-point fixed, light and small-sized, large-range downward viewing angle adjustable mechanism, which is composed of a hanging arm, a double-headed stud, a large nut, a pitch bearing, a guide head mounting ring, an L-shaped inertial navigation mounting plate, a set screw and the like.

[0039] The hanging arm is a core load-bearing component, and adopts a U-shaped structure, which not only ensures the strength and rigidity of the component, but also facilitates installation.

[0040] First, fix one end of the stud with a positioning plane on the hanging arm through the second large nut. The positioning plane is designed to prevent the screw from rotating with the nut when the nut is tightened and thus failing to tighten. The first large nut and the second large nut have the same shape, such as Figure 2 The stud has a latch slot and a positioning plane, as shown in Figure 3 shown.

[0041] Install the second anti-loosening screw into the corresponding hole of the second large nut and tighten it. Use the pressure of the set screw to squeeze the slot of the large nut to prevent the large nut from loosening. Then insert the second pin into the pin slot of the stud and press Figure 1When the mechanism is fixed to the hanging flying interface component by using the first latch, the first anti-loosening screw and the first large nut, its function and installation method are the same as described above.

[0042] Install the pitch bearing into the bearing hole of the suspension arm (see Figure 6 ), control the axial clearance of the bearing by adjusting the washer, and then limit and fix it with the bearing end cover.

[0043] The seeker mounting ring and the L-shaped inertial navigation mounting plate are respectively connected to the inner ring shaft of the pitch bearing to achieve synchronous movement of the test product and the inertial navigation.

[0044] Install the set screw seat on the lower side of the L-shaped inertial navigation mounting plate, align the position scale on the set screw seat with the position scale with a scale of 0 on the position hanging arm, install the set screw and tighten it. This indicates that the adjustment mechanism is at the horizontal position of 0°.

[0045] Thirteen threaded holes are arranged at intervals of 10° on the arm as fixing holes for set screws (see Figure 4 ). When adjusting the angle, take out the set screw, turn the guide head mounting ring to the required angle, and then fix the set screw. This mechanism can adjust the pitch of the tested product by +10° to -120°.

[0046] Install the inertial navigation system onto the L-shaped inertial navigation system mounting plate, ensuring that the inertial navigation system mounting reference surface is closely fitted with the reference surface on the L-shaped inertial navigation system mounting plate.

[0047] Install the tested product on the seeker mounting ring; install the GPS antenna, data link antenna, etc. Figure 1 Position shown.

[0048] Figure 4 and Figure 5 A single-point fixed, light and small-sized mechanism with a large range of downward viewing angle adjustment is shown. The example mechanism includes a first data link antenna 1, a GPS antenna 2, a seeker mounting ring 3, a flight hanging interface component 4 (belonging to a flight hanging platform), a first latch 5, a first anti-loosening screw 6, a first large nut 7, an inertial navigation 8, a stud 9, a hanging arm 10, a second large nut 11, a second anti-loosening screw 12, a second latch 13, a second data link antenna 14, a set screw 15, a set screw seat 16, an L-shaped inertial navigation mounting plate 17, a GPS antenna bracket 18, a first pitch semi-axis 19, a pitch bearing 20, a bearing pressure plate 21, a second pitch semi-axis 22, a data link antenna bracket 23, a seeker 24, a first screw 25, a second screw 26, a third screw 27, and a fourth screw 28.

[0049] like Figure 7As shown, the upper end of the hanging arm 10 is provided with a through hole connected to the hanging interface component 4, the axial direction of the through hole is in the vertical direction, and the inner side of the through hole is provided with a positioning surface matching the stud 9; the lower end is provided with a bearing hole for installing the pitch bearing 20, and the axial direction of the bearing hole is in the horizontal direction.

[0050] The second pitch semi-axis 22 is provided with two screw holes connected to the guide head mounting ring 3 at the upper and lower ends, the axial direction of the screw hole is vertical, and a circular hole with a horizontal axial direction is provided in the middle, and a circle of screw holes connected to the first pitch semi-axis 19 is provided on the circular hole.

[0051] The first pitch semi-axis 19 is a circular ring structure, one side of which is provided with a circle of screw holes connected to the L-shaped inertial navigation mounting plate 17 , and the other side of which is provided with a circle of threaded holes connected to the second pitch semi-axis 22 .

[0052] The outer side of the seeker mounting ring 3 is provided with two parallel bosses, on which screw holes for mounting in cooperation with the second pitch semi-axis 22 are provided, and the inside of the ring is used for mounting the seeker 24.

[0053] The L-shaped inertial navigation mounting plate 17 is L-shaped, with a through hole on the vertical surface, a circle of threaded holes matching the pitch semi-axis 19 on the through hole, and a horizontal surface for placing the inertial navigation 8.

[0054] Described stud 9 is as Figure 3 As shown, there are latch slots at the upper and lower ends, and a positioning plane in the middle.

[0055] The first large nut 7 and the second large nut 11 are as follows Figure 2 As shown, a locking screw hole is provided at the upper end, and a slot is provided on one side close to the locking screw hole.

[0056] The set screw seat 16 is provided with a screw hole for installing the set screw 15, and a scale is provided on the lower side thereof.

[0057] The set screw 15 passes through the screw hole on the set screw seat 16 and is fixed in the adjustment hole on the hanging arm 10 .

[0058] The installation steps are as follows:

[0059] The first step is to fasten the stud 9 to the hanging arm 10 through the first large nut 7, and then tighten the first anti-loosening screw 6 (see Figure 1 ) is installed on the first large nut 7 (see Figure 2 ), and finally insert the first latch 5 into the corresponding groove of the stud 9 (see Figure 3 ) and press Figure 1 Bending the first latch 5;

[0060] The second step is to install the pitch bearing 20 into the hanging arm 10, control the axial clearance of the bearing by adjusting the washer, and then install the bearing pressure plate 21 into the hanging arm 10 with the third screw 27 to complete the positioning and fixing of the outer ring of the bearing;

[0061] Step 3: Install the first pitch semi-shaft 19 and the second pitch semi-shaft 22 from both ends of the inner ring of the pitch bearing 20, and connect and fix the first pitch semi-shaft 19 and the second pitch semi-shaft 22 by the second screw 26;

[0062] Step 4: Use the first screw 25 to fix the seeker mounting ring 3 to the second pitch semi-axis 22, and use the fourth screw 28 to fix the L-shaped inertial navigation mounting plate 17 to the first pitch semi-axis 19;

[0063] Step 5: Install the set screw seat 16 on the lower side of the L-shaped inertial navigation mounting plate 17, and align the position scale on the set screw seat 16 with the position scale with a scale of 0 on the position hanging arm 10, then install the set screw 15 and tighten it. At this time, it indicates that the adjustment mechanism is at the horizontal position of 0°. When adjusting the angle, take out the set screw 15, turn the guide head mounting ring 3 to the required angle, and then fix the set screw 15.

[0064] Step 6: fix the GPS antenna bracket 18 to the hanging arm 10, and then fix the GPS antenna 2 to the GPS antenna bracket 18;

[0065] Step 7: directly fix the first data link antenna 1 to one side of the bracket 10; the second data link antenna 14 is installed on the bracket 10 through the data link antenna bracket 23;

[0066] Step 8: Install the inertial navigation system 8 on the L-shaped inertial navigation system mounting plate 17;

[0067] The ninth step is to install the seeker 24 on the seeker mounting ring 3 .

[0068] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should be included in the protection scope of the present invention.

Claims

1. A small, light and wide-range downward viewing angle adjustable mechanism with a single point fixation, characterized in that The invention comprises a hanging arm (10), a stud (9), a large nut, a pitch bearing (20), a guide head mounting ring (3), an L-shaped inertial navigation mounting plate (17), a set screw (15), a set screw seat (16), a first pitch semi-axis (19), a second pitch semi-axis (22), and a pitch bearing (20); the upper end of the hanging arm (10) is fixed to the hanging interface component by the stud (9) and the large nut, and the lower end is provided with a bearing hole for mounting the pitch bearing (20); the first pitch semi-axis (19), the second pitch semi-axis (22) are ... The pitch half-axes (22) are fixed together from both sides of the pitch bearing (20); the seeker mounting ring (3) is mounted on the second pitch half-axes (22); the L-shaped inertial navigation mounting plate (17) is mounted on the first pitch half-axes (19); the set screw seat (16) is mounted on the lower side of the L-shaped inertial navigation mounting plate (17); after the seeker mounting ring (3) is moved to a required angle, the set screw (15) is fixed to the hanging arm (10) through the set screw seat (16) to achieve angle adjustment.

2. According to claim 1, a single-point fixed, light and small-sized mechanism with a wide range of downward viewing angle adjustment is characterized in that It also includes a GPS antenna (2), a first data link antenna (1), and a second data link antenna (14), and the three antennas are all fixed on the hanging arm.

3. According to claim 1, a single-point fixed, light and small-sized mechanism with a wide range of downward viewing angle adjustment is characterized in that The stud bolt (9) is provided with latch slots at the upper and lower ends, and a positioning plane is provided in the middle.

4. According to claim 1, a single-point fixed, light and small-sized mechanism with a wide range of downward viewing angle adjustment is characterized in that The upper end of the large nut is provided with a screw hole for preventing loosening, and a slot is provided on one side close to the screw hole for preventing loosening.

5. According to claim 1, a single-point fixed, light and small-sized mechanism with a wide range of downward viewing angle adjustment is characterized in that The first pitch semi-axis (19) is a circular ring structure, one side of which is provided with a screw hole connected to the L-shaped inertial navigation mounting plate (17), and the other side of which is provided with a threaded hole connected to the second pitch semi-axis (22).

6. The single-point fixed, light and small-sized, large-range downward viewing angle adjustable mechanism according to claim 1, characterized in that The upper and lower ends of the second pitch semi-axis (22) are both provided with screw holes for connecting to the guide head mounting ring (3), the axial direction of the screw hole is in the vertical direction, and a circular hole with an axial direction in the horizontal direction is provided in the middle, and a screw hole for connecting to the first pitch semi-axis (19) is provided on the circular hole.

7. The single-point fixed, light and small-sized mechanism with a wide range of downward viewing angle adjustment according to claim 1, characterized in that The outer side of the seeker mounting ring (3) is provided with two parallel bosses, the bosses are provided with screw holes for mounting in cooperation with the second pitch semi-axis (22), and the inside of the ring is used for mounting the seeker.

8. The single-point fixed, light and small-sized mechanism with a wide range of downward viewing angle adjustment according to claim 1, characterized in that The L-shaped inertial navigation installation plate (17) is L-shaped, with a through hole on the vertical surface, a threaded hole matching the first pitch semi-axis on the through hole, and a horizontal surface for placing the inertial navigation.

9. The single-point fixed, light and small-sized mechanism with a wide range of downward viewing angle adjustment according to claim 1, characterized in that Thirteen threaded holes are arranged at intervals of 10° on the hanging arm (10) as fixing holes for set screws.

10. The single-point fixed, light and small-sized mechanism with a wide range of downward viewing angle adjustment according to claim 1, characterized in that The pitch bearing (20) is installed in the bearing hole of the suspension arm (10), the axial clearance of the bearing is controlled by adjusting the washer, and then the bearing end cover (21) is used to limit and fix it.

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