Airborne radio altimeter structure with damping bracket

Abstract

The airborne radio altimeter structure with the damping bracket comprises a radio altimeter module, an integral shell of the radio altimeter module is composed of a lower shell and an upper cover plate, the top of the lower shell is provided with a signal processing plate mounting cavity, and the top of the lower shell is connected with the upper cover plate through bolts; the shock-absorbing bracket is positioned below the radio altimeter module and comprises a horizontal mounting bottom plate, a bracket plate and four groups of shock-absorbing springs which are symmetrically distributed; the damping spring is arranged between the horizontal mounting bottom plate and the bracket plate; the locking mechanism comprises round guide sleeves arranged on the two sides of the lower shell, a guide pin arranged on the top of the bracket, and an eccentric wheel locker for driving the guide pin to be locked with the round guide sleeves; wherein the radio altimeter module slides to a preset position along the top of the bracket through the locking mechanism and then is locked. The eccentric wheel locker is matched with the round guide sleeve and the conical guide pin for use, so that a product can be effectively locked, the locking effect is good, and the product is firmly locked.

Description

TECHNICAL FIELD

[0001] The utility model relates to airborne radio equipment technical field especially relates to a radio altimeter structure with shock attenuation bracket for airborne. BACKGROUND

[0002] The traditional airborne radio altimeter usually adopts rigid connection mode when installing, cannot effectively isolate the vibration caused by the aircraft engine and airflow, leads to the internal electronic components vulnerable to impact damage, and the electromagnetic shielding performance is insufficient. In addition, the installation and dismounting process of the existing altimeter module is complicated, cannot be quickly locked and released. UTILITY MODEL CONTENTS

[0003] The utility model discloses a radio altimeter structure with shock attenuation bracket for airborne, which solves the aforementioned problems in the prior art.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme as follows:

[0005] A radio altimeter structure with shock attenuation bracket for airborne, comprising:

[0006] A radio altimeter module, the integral shell is composed of a lower shell and an upper cover plate, the lower shell top is provided with a signal processing plate installation cavity, and the top is connected with the upper cover plate through bolts;

[0007] A bracket with shock attenuation is located below the radio altimeter module and comprises a horizontal installation bottom plate, a bracket plate and four groups of symmetrically distributed shock absorber springs; the shock absorber springs are arranged between the horizontal installation bottom plate and the bracket plate, the top end is connected with the bottom end of the bracket plate, and the bottom end is connected with the top end of the horizontal installation bottom plate;

[0008] A locking mechanism, comprising a round guide sleeve arranged on both sides of the lower shell, a guide pin arranged on the top of the bracket, and an eccentric wheel locker for driving the guide pin and the round guide sleeve to lock;

[0009] The radio altimeter module is locked after sliding to the preset position along the top of the bracket through the locking mechanism, and the junction of the lower shell and the upper cover plate is provided with an annular groove, and a bimodal conductive rubber strip is embedded in the groove.

[0010] In some specific embodiments, the back plate of the bracket is provided with symmetrically distributed guide pin mounting holes, the guide pin is embedded into the guide pin mounting hole through the flange at the rear end, and the conical surface at the front end of the guide pin forms linear contact locking with the inner circular surface of the round guide sleeve.

[0011] In some specific embodiments, the bimodal conductive rubber strip comprises:

[0012] The outer side silicon rubber peak is interference fit with the annular groove of the lower shell to form a sealed interface;

[0013] The inner conductive rubber peak contacts the conductive plating layer of the lower shell when the upper cover plate is pressed, forming an electromagnetic shielding path.

[0014] In some embodiments, a bracket is arranged in the signal processing plate mounting cavity, and the signal processing plate and the microwave assembly are fixed on the bracket by bolts, and a shock absorbing pad is arranged between the bracket and the inner wall of the lower shell.

[0015] In some embodiments, the shock absorbing springs of the bracket are helical springs, the stiffness coefficient of which is 20N / mm-50N / mm, and the four groups of springs are symmetrically distributed at four corners of the bracket and are welded and fixed with the flanges of the horizontally mounted bottom plate.

[0016] In some embodiments, the eccentric wheel locker is arranged outside the bracket, the guide pin is driven to move along the axis by rotating the eccentric wheel, and the contact length between the conical surface of the guide pin and the circular guide sleeve after locking is not less than 5mm.

[0017] In some embodiments, the upper cover plate is provided with a power panel slot at the bottom, and the power panel is inserted into the slot through wires.

[0018] The radio altimeter structure with the shock absorbing bracket comprises a radio altimeter module, a lower shell and an upper cover plate, the lower shell is provided with a signal processing plate mounting cavity at the top, and the top is connected with the upper cover plate through bolts; the bracket with shock absorption is located below the radio altimeter module and comprises a horizontally mounted bottom plate, a bracket plate and four groups of symmetrically distributed shock absorbing springs; the shock absorbing springs are arranged between the horizontally mounted bottom plate and the bracket plate; the locking mechanism comprises a circular guide sleeve arranged on both sides of the lower shell, a guide pin arranged on the top of the bracket, and an eccentric wheel locker for driving the guide pin and the circular guide to lock; wherein the radio altimeter module is locked after being slid to a preset position along the top of the bracket through the locking mechanism, an annular groove is arranged at the joint of the lower shell and the upper cover plate, and a double-peak conductive rubber strip is embedded in the groove. The eccentric wheel locker, the circular guide sleeve and the conical guide pin are used in cooperation, so that the locking of the product can be effectively realized, the locking effect is good, and the product is firmly locked. The shock absorbing springs can ensure that the product has sufficient rigidity and is not shaken greatly, effectively alleviate the vibration of the product in the actual use process, reduce the wear of the product, and improve the reliability of the product. The radio altimeter module adopts a whole structure design, can ensure that the product has good electromagnetic compatibility, and the double-peak conductive rubber strip installed at the structure joint can ensure the sealing property and the conduction of the electrical property of the structural member. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a radio altimeter whole structure schematic view of the utility model;

[0020] Figure 2 is a radio altimeter profile of the utility model;

[0021] Figure 3 is a radio altimeter module exploded view of the utility model;

[0022] Figure 4 is the assembly drawing of the radio altimeter with shock absorbing bracket of the utility model.

[0023] In the drawing, 1, radio altimeter module;101, lower shell;102, upper cover plate;103, annular groove;2, bracket;201, horizontal installation bottom plate;202, shock absorbing spring;203, bracket plate;3, back plate;301, round guide sleeve;302, guide pin;303, eccentric wheel lock;5, support;501, signal processing board;502, microwave assembly;601, power board;12, handle;13, nameplate;14, TNC connector;

[0024] 15, download port cover plate;16, lock hook. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following will be further described in detail. It should be understood that the specific embodiment described herein is only used to explain the utility model, and is not used to limit the utility model.

[0026] Referring to Figure 1 、 Figure 2 、 Figure 3 And Figure 4 The radio altimeter structure with shock absorbing bracket for airborne shown in the drawing, comprising:

[0027] Radio altimeter module 1, the integral shell is composed of lower shell 101 and upper cover plate 102, and the lower shell 101 top is equipped with signal processing board 501 installation cavity, is used to install signal processing board 501 and other key components.The top is connected with the upper cover plate 102 through bolt, and the stability of structure is ensured.

[0028] The bracket with shock absorption is located below radio altimeter module 1, and plays the role of support and shock absorption.The bracket includes horizontal installation bottom plate 201, bracket plate 203 and four groups of symmetrically distributed shock absorbing springs 202;Shock absorbing spring 202 is arranged between horizontal installation bottom plate 201 and bracket plate 203, and the top end is connected with the bottom end of bracket plate 203, and the bottom end is connected with the top end of horizontal installation bottom plate 201;Effectively absorb and relieve vibration.Spring stiffness coefficient is 20N / mm-50N / mm, which ensures that there is enough rigidity to support the whole structure, and vibration can be effectively relieved.

[0029] The locking mechanism includes a round guide sleeve 301 arranged on both sides of the lower housing 101, a guide pin 302 arranged on the top of the bracket 2, and an eccentric wheel locker 303 for locking the guide pin 302 and the round guide sleeve 301. The locking mechanism is used to lock the radio altimeter module 1 on the bracket 2, ensuring the stability and safety of the radio altimeter module 1 during use.

[0030] The radio altimeter module 1 is locked by the locking mechanism after being slid to a preset position along the top of the bracket 2. An annular groove 103 is arranged at the joint of the lower housing 101 and the upper cover plate 102, and a bimodal conductive rubber strip is embedded in the groove. It should be noted that the bimodal conductive rubber strip is installed in the groove, and the outer side of the bimodal conductive rubber strip is made of silicone rubber, which can effectively prevent water and gas from entering the cavity. The inner side is made of conductive rubber. When the cover plate is pressed, the cover plate and the housing form a conductive path, improving the electromagnetic compatibility of the product.

[0031] In some embodiments, the back plate 3 of the bracket 2 is provided with symmetrically distributed guide pin 302 mounting holes. The guide pin 302 is embedded in the guide pin 302 mounting hole through the flange at the rear end. This design enables the guide pin 302 to be stably fixed on the bracket 2 and cooperates with the round guide sleeve 301 to realize the locking function. The conical surface at the front end of the guide pin 302 forms a line contact with the inner surface of the round guide sleeve 301.

[0032] In some embodiments, the bimodal conductive rubber strip includes:

[0033] The outer silicone rubber peak is in interference fit with the annular groove 103 of the lower housing 101, forming a sealed interface.

[0034] The inner conductive rubber peak contacts the conductive plating layer of the lower housing 101 when the upper cover plate 102 is pressed, forming an electromagnetic shielding path.

[0035] In this embodiment, an annular groove 103 is arranged at the joint of the lower housing 101 and the upper cover plate 102, and a bimodal conductive rubber strip is embedded in the groove. The bimodal conductive rubber strip includes an outer silicone rubber peak and an inner conductive rubber peak. The silicone rubber peak is in interference fit with the annular groove 103 of the lower housing 101, forming a sealed interface. The conductive rubber peak contacts the conductive plating layer of the lower housing 101 when the upper cover plate 102 is pressed, forming an electromagnetic shielding path. This design not only ensures the sealing of the structure, but also ensures the electromagnetic shielding performance.

[0036] In some embodiments, the signal processing board 501 is installed in the cavity with a bracket 5, and the signal processing board 501 and the microwave assembly 502 are fixed on the bracket 5 by bolts. A damping pad is arranged between the bracket 5 and the inner wall of the lower shell 101, further reducing the influence of vibration on electronic components. The signal processing board 501 is fastened to the bracket 5 by screws, and the microwave assembly 502 is fastened to the bracket 5 by screws, forming a component. This component can be disassembled as a whole in the later stage, improving the efficiency of assembly and maintenance. It should be noted that the bracket 5 has two parallel mounting grooves for installing the signal processing board 501 and the microwave assembly 502 respectively.

[0037] The connector at the rear end of the signal processing board 501 is connected to the connector of the microwave assembly 502 component, realizing the communication between the signal processing board 501 and the microwave assembly 502. The two rectangular connectors of the signal processing board 501 are connected to the rectangular connector of the power board 601, realizing the power supply of the signal processing board 501 and the communication between the two boards.

[0038] The cover plate is pasted with a heat-conducting silicone pad of appropriate height, so that the heat of the microwave assembly 502 with high heat generation can be quickly conducted to the shell of the height module, realizing the heat dissipation of the microwave assembly 502.

[0039] The design of the handle 12 makes it easier to carry the product during installation and transfer.

[0040] The nameplate 13 is made of aluminum alloy, the surface is black oxidized, and the product information is printed out by laser engraving. The surface is coated with a three-proofing paint to effectively meet the "three-proofing" requirements of the nameplate.

[0041] The TNC connector 14 is connected to the SMA connector on the microwave assembly 502, realizing the communication between the module and the antenna.

[0042] The download cover plate 15 serves as the download port of the product program. When in use, the screws on both sides are removed, and the connector is connected to the connector of the downloader to realize the download and update of the product software.

[0043] The lock hook 16 is used in combination with the eccentric wheel locker 303 to lock the product.

[0044] In some embodiments, the damping spring 202 of the bracket is a spiral spring with a stiffness coefficient of 20N / mm-50N / mm. Four groups of springs are symmetrically distributed at the four corners of the bracket and are welded and fixed with the flange of the horizontally installed bottom plate.

[0045] In some embodiments, the eccentric wheel locker 303 is arranged on the outside of the bracket, and the guide pin 302 is driven to move along the axis by rotating the eccentric wheel. The contact length between the conical surface of the guide pin 302 and the circular guide sleeve 301 after locking is not less than 5mm.

[0046] In the present embodiment, the working principle of the eccentric wheel lock 303: the eccentric wheel lock 303 is arranged outside the bracket, and the guide pin 302 is driven to move along the axis by rotating the eccentric wheel. When the conical surface at the front end of the guide pin 302 forms a line contact with the inner circular surface of the circular guide sleeve 301, the locking function is realized. After locking, the contact length of the conical surface of the guide pin 302 with the circular guide sleeve 301 is not less than 5mm, which ensures the firmness of the locking.

[0047] In some specific embodiments, the upper cover plate 102 is provided with a power board 601 slot at the bottom, and the power board 601 is inserted into the slot through the wire. This design facilitates the installation and disassembly of the power board 601, and improves the convenience of maintenance.

[0048] It should be noted that the power board 601 is integrated by two PCBs, the lower PCB with larger size provides the required power for the signal processing board 501, and the upper PCB with smaller size is a download port adapter board, and the two PCBs communicate through a connector. When the power board 601 is installed, the lower PCB with larger size first contacts the boss inside the height gauge module shell, and then slides along the boss to the panel end until the connector contacts the height gauge module shell, and then the PCB is fastened to the height gauge module shell with screws.

[0049] In specific embodiments, the assembly and use can be carried out according to the following steps:

[0050] 1. Weld the shock absorbing spring 202 to the flange of the horizontal mounting bottom plate, and connect the bracket plate 203 to the top end of the shock absorbing spring 202.

[0051] 2. Insert the guide pin 302 through the rear flange into the guide pin 302 mounting hole of the bracket back plate 3.

[0052] 3. Place the radio altimeter module on the top of the bracket, and slide along the top of the bracket to the preset position after locking by the locking mechanism.

[0053] 4. Insert the double-peak conductive rubber strip into the annular groove 103 at the junction of the lower shell 101 and the upper cover plate 102.

[0054] 5. Connect the upper cover plate 102 to the top of the lower shell 101 through bolts to ensure the stability and sealing of the structure.

[0055] 6. Insert the power board 601 into the power board 601 slot at the bottom of the upper cover plate 102 through the wire.

[0056] By following the above steps, the assembly and use of this utility model can be completed. This utility model, through the design of structures such as the shock-absorbing spring 202 and the eccentric wheel locking device 303, effectively solves the problems existing in the prior art and improves the reliability and electromagnetic shielding performance of the radio altimeter.

[0057] Overall Plan:

[0058] A radio altimeter mainly consists of two parts: the radio altimeter module and a shock-absorbing bracket. For example... Figure 1 As shown. During installation on the aircraft, first align the four through holes of the shock-absorbing bracket with the threaded holes on the frame, and then use four M5 screws to secure the shock-absorbing bracket to the frame. Loosen the two eccentric wheel locks 303 at the front end of the bracket, and slide the radio altimeter module inward along the top of the shock-absorbing bracket until the circular guide sleeve 301 on the radio altimeter is fully in contact with the guide pin 302 on the bracket. At this point, tighten the eccentric wheel locks 303 until the lock nut cannot be rotated, thus completing the securing of the radio altimeter.

[0059] The circular guide sleeve 301 is cylindrical on both the inner and outer sides, with a square flange as the mounting surface. Four countersunk holes are milled into the flange, and it is secured to the altimeter housing with four countersunk screws. The guide pin 302 is cylindrical in body, conical at the front end, and a square flange at the rear end. Four countersunk holes are milled into the flange, and it is secured to the bracket plate 203 with four countersunk screws. When the altimeter is locked, the inner circular surface of the circular guide sleeve 301 contacts the conical surface at the front end of the guide pin 302. This contact is a line contact, which effectively eliminates contact gaps and ensures a stable contact.

[0060] The front of the altimeter uses an eccentric wheel locker 303. The axial spring force of the locker ensures that the round guide sleeve 301 and the guide pin 302 are in complete contact. At the same time, the locker has an anti-loosening function to prevent the locker from reversing and causing a gap between the contact surface of the round guide sleeve 301 and the guide pin 302, thus increasing unnecessary shaking.

[0061] This locking method can completely secure the altimeter module to the bracket, preventing the product from loosening during vibration testing and use.

[0062] By adopting the above-disclosed technical solution of this utility model, the following beneficial effects are obtained:

[0063] The utility model discloses an airborne radio altimeter structure with shock attenuation bracket, including radio altimeter module, its integrated casing is by lower casing 101 and upper cover plate 102 is formed, and the lower casing 101 top is equipped with signal processing board 501 installation cavity, and the top is connected through bolt with upper cover plate 102, the bracket with shock attenuation is located radio altimeter module below, including horizontal installation bottom plate, bracket plate 203 and four groups of symmetrical distribution's shock attenuation spring 202, shock attenuation spring 202 sets up between horizontal installation bottom plate and bracket plate 203, locking mechanism, including being located in the both sides of lower casing 101 round guide sleeve 301, being located in the top of bracket guide pin 302 and drive guide pin 302 and round guide locking eccentric wheel locker 303, wherein radio altimeter module is locked after sliding to the preset position along the top of bracket through locking mechanism, and the junction of lower casing 101 and upper cover plate 102 is equipped with annular groove 103, and the double-peak type conductive rubber strip is inlayed in the groove. The utility model discloses through eccentric wheel locker 303 and round guide sleeve 301, taper guide pin 302 cooperation uses, can effectively realize the locking of product, and its locking effect is very good, and product locking is firm. Through the design shock attenuation spring 202, can guarantee that product whole has enough rigidity, and product will not swing greatly, effectively relieve the vibration of product in actual use process simultaneously, reduce the attrition of product, can improve the reliability of product. The altimeter module adopts integrated structure design, can guarantee that product has good electromagnetic compatibility, and installs the double-peak type conductive rubber strip in the structure joint, guarantees the sealing property and guarantees the conduction of structural member electric property.

[0064] The above only is the preferred implementation mode of the utility model, should point out, for ordinary skill in the art of the prior art, under the premise of not departing from the principle of the utility model, can also make a number of improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model.

Claims

1. An airborne radio altimeter structure with a shock absorbing bracket, characterized by, The application relates to a radio altimeter module (1) which is composed of a lower shell (101) and an upper cover plate (102), the top of the lower shell (101) is provided with a signal processing plate mounting cavity, and the top and the upper cover plate (102) are connected through bolts; a bracket (2) with shock absorption is arranged below the radio altimeter module (1) and comprises a horizontal mounting bottom plate (201), a bracket plate (203) and four groups of symmetrically-distributed shock absorption springs (202); the shock absorption springs (202) are arranged between the horizontal mounting bottom plate (201) and the bracket plate (203), the top end of the shock absorption springs (202) is connected with the bottom end of the bracket plate (203), and the bottom end of the shock absorption springs (202) is connected with the top end of the horizontal mounting bottom plate (201); a locking mechanism is arranged and comprises round guide sleeves (301) arranged on both sides of the lower shell (101), guide pins (302) arranged on the top of the bracket (2) and an eccentric wheel locker (303) for driving the guide pins (302) to lock with the round guide sleeves (301); wherein the radio altimeter module (1) is locked after being slid to a preset position along the top of the bracket (2) through the locking mechanism, an annular groove (103) is arranged at the joint of the lower shell (101) and the upper cover plate (102), and a double-peak conductive rubber strip is embedded in the groove. A back plate (3) of the bracket (2) is provided with symmetrically-distributed guide pin mounting holes (204), the guide pins (302) are embedded into the guide pin mounting holes (204) through flanges at the rear ends of the guide pins (302), and a conical surface (305) at the front end of the guide pins (302) forms linear contact locking with the inner circular surface of the round guide sleeves (301). The double-peak conductive rubber strip comprises: An outer silicon rubber peak which is in interference fit with the annular groove (103) of the lower shell (101) and forms a sealed interface; An inner conductive rubber peak which is in contact with a conductive plating layer of the lower shell (101) when the upper cover plate (102) is pressed and forms an electromagnetic shielding path.

2. The radio altimeter structure of claim 1, wherein, A support (5) is arranged in the signal processing plate mounting cavity, a signal processing plate (501) and a microwave assembly (502) are fixed on the support (5) through bolts, and a shock absorption pad is arranged between the support (5) and the inner wall of the lower shell (101).

3. The radio altimeter structure of claim 1, wherein, The shock absorption springs (202) of the bracket (2) are helical springs, the stiffness coefficient of the helical springs is 20N / mm-50N / mm, four groups of the springs are symmetrically distributed at four corners of the bracket (2) and are welded and fixed with flanges of the horizontal mounting bottom plate (201). The eccentric wheel locker (303) is arranged outside the bracket (2) and drives the guide pins (302) to move along the axis by rotating the eccentric wheel, the contact length between the conical surface of the guide pins (302) and the round guide sleeves (301) is not less than 5mm after locking. The bottom of the upper cover plate (102) is provided with a power board slot, and a power board (601) is inserted into the slot through wires.

4. The radio altimeter structure of claim 1, wherein, ​ 5. The radio altimeter structure of claim 1, wherein, ​ 6. The radio altimeter structure of claim 1, wherein, ​ 7. The radio altimeter structure of claim 1, wherein ​

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