CN219513330U - Ground expansion stay bar of space-borne SAR antenna - Google Patents

Abstract

The utility model relates to the technical field of synthetic aperture radar antennas, in particular to a ground unfolding brace of a satellite-borne SAR antenna. The ground unfolding brace of the spaceborne SAR antenna comprises a ground supporting wheel, a sleeve, a screw, a movable rod and an elastic device; one end of the sleeve is connected with the ground supporting wheel, the other end of the sleeve is provided with a nut, and the screw rod is connected with the sleeve through the nut; the elastic device is arranged in the screw rod, the movable rod is connected with the screw rod through the elastic device, and one end of the movable rod is inserted into the screw rod. According to the utility model, the supporting wheel is arranged on the ground to support the whole body, the sleeve and the screw rod are used for stretching and adjusting the free height of the movable rod, and the movable rod is connected with the screw rod through the elastic device to balance the gravity of the antenna, so that the unfolding mechanism of the antenna is protected from being damaged. Simple structure, portable transport can expand at any moment and carry out ground support to the antenna.

Description

Ground expansion stay bar of space-borne SAR antenna

Technical Field

The utility model relates to the technical field of synthetic aperture radar antennas, in particular to a ground unfolding brace of a satellite-borne SAR antenna.

Background

SAR (Synthetic Aperture Radar), namely a synthetic aperture radar, is an active earth observation system, can be installed on a flight platform such as an airplane, a satellite, a spacecraft and the like, can observe the earth all the time and all the weather, and has certain earth surface penetrating capacity.

The satellite-borne SAR antenna is not influenced by sand dust, cloud mist and water vapor, can be observed on the ground in all weather, has more application in remote sensing and investigation satellites, has larger general size, needs a spreading mechanism to drive the SAR antenna to spread and keep the spreading state of the antenna after the satellite enters orbit, so that gravity offset needs to be carried out on the antenna during the ground spreading test of the SAR antenna, the spreading mechanism of the antenna is protected from being damaged, the spreading of the ground antenna mostly adopts a truss hanging mode, but the truss has larger size and cannot be carried portably, so that the spreading of the antenna is limited by the field, and the ground supporting tool which can be spread at any moment is urgently needed.

Disclosure of Invention

The utility model aims to provide a ground unfolding brace of a satellite-borne SAR antenna, which can be unfolded at any time conveniently to support the antenna.

Embodiments of the present utility model are implemented as follows:

the utility model provides a ground unfolding brace of a satellite-borne SAR antenna, which comprises a ground supporting wheel, a sleeve, a screw, a movable rod and an elastic device, wherein the sleeve is arranged on the ground supporting wheel;

one end of the sleeve is connected with the ground supporting wheel, the other end of the sleeve is provided with a nut, and the screw rod is connected with the sleeve through the nut;

the elastic device is arranged in the screw rod, the movable rod is connected with the screw rod through the elastic device, and one end of the movable rod is inserted into the screw rod.

In an alternative embodiment, the nut is connected to the sleeve by a collar.

In an alternative embodiment, the retainer ring includes an inner ring, an outer ring, and a connecting ring;

a connecting groove is formed in the outer wall of the sleeve, one end of the inner ring is inserted into the connecting groove, the other end of the inner ring is connected with the connecting ring, and the other end of the connecting ring is connected with the outer ring;

the outer ring is provided with a connecting hole, and the connecting bolt penetrates through the connecting hole to fix the outer ring on the nut.

In an alternative embodiment, the inner ring and the outer ring are arranged in parallel, and the connecting ring is perpendicular to the inner ring.

In an alternative embodiment, balls are provided between the nut and the sleeve.

In an alternative embodiment, a limit threaded hole is formed in the side wall of the sleeve, a first limit bolt is arranged in the limit hole, and the end portion of the first limit bolt penetrates through the limit threaded hole and then is connected with the screw.

In an alternative embodiment, a chute is provided on a side wall of the screw, and the first limit bolt is inserted into the chute to limit rotation of the screw.

In an alternative embodiment, the end of the screw at the end inserted into the sleeve is provided with a guide block.

In an alternative embodiment, the elastic device is a compression spring;

the movable rod is provided with a blocking step, and a baffle ring is arranged in the screw rod;

one end of the pressure spring is abutted with the blocking step, and the other end of the pressure spring is abutted with one side of the blocking ring.

In an alternative embodiment, a second limit bolt is arranged at the end part of the movable rod penetrating through the baffle ring, and a baffle is arranged between the second limit bolt and the baffle ring.

The embodiment of the utility model has the beneficial effects that:

through setting up the supporting wheel subaerial, support the whole, sleeve and screw rod are flexible adjusts the free height of movable rod, are connected through resilient means between movable rod and the screw rod for balance antenna's gravity, thereby protect antenna's expansion mechanism not receive the damage.

The ground unfolding brace rod provided by the utility model has a simple structure, is convenient to carry and carry, and can be unfolded at any time to support the antenna on the ground.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a ground deployment support bar of a satellite-borne SAR antenna according to an embodiment of the present utility model;

fig. 2 is a front view of a ground deployment supporting rod of the spaceborne SAR antenna according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 2 at I;

FIG. 4 is a cross-sectional view A-A of FIG. 2;

FIG. 5 is an enlarged view of a portion at II of FIG. 4;

FIG. 6 is an enlarged view of a portion of FIG. 4 at III;

fig. 7 is a schematic structural diagram of a retainer ring of a ground deployment supporting rod of a satellite-borne SAR antenna according to an embodiment of the present utility model.

Icon: 1-a sleeve; 2-a screw; 3-a movable rod; 4-nuts; 5-supporting wheels; 6-a compression spring; 7-a chute; 8-a first limit bolt; 9-corner fitting; 10-limiting threaded holes; 11-scale; 12-a baffle; 13-a second limit bolt; 14-a guide block; 15-blocking the step; 16-baffle ring; 17-check ring; 18-balls; 19-an inner ring; 20-connecting rings; 21-outer ring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Some embodiments of the present utility model are described in detail below with reference to fig. 1 to 7. The following embodiments and features of the embodiments may be combined with each other without conflict.

The utility model provides a ground unfolding brace of a satellite-borne SAR antenna, which is shown in figures 1, 2 and 4 and comprises a ground supporting wheel 5, a sleeve 1, a screw rod 2, a movable rod 3 and an elastic device; one end of the sleeve 1 is connected with a ground supporting wheel 5, the other end of the sleeve 1 is provided with a nut 4, and the screw 2 is connected with the sleeve 1 through the nut 4; the elastic device is arranged in the screw rod 2, the movable rod 3 is connected with the screw rod 2 through the elastic device, and one end of the movable rod 3 is inserted into the screw rod 2.

In this embodiment, the support wheel 5 is a universal wheel, which is supported on the ground to be freely movable.

In this embodiment, one end of the sleeve 1 is fixedly connected with the universal wheel through a flange plate or other structures, the other end of the sleeve 1 is connected with a nut 4, the nut 4 is connected with a screw rod 2, the screw rod 2 is connected with a movable rod 3 through an elastic device, a corner fitting 9 is connected with the other end of the movable rod 3, and the movable rod 3 is connected with the spaceborne SAR antenna through the corner fitting 9.

Specifically, in this embodiment, the nut 4 is rotationally connected with the sleeve 1, the screw 2 is slidingly connected with the sleeve 1, and the screw 2 is driven to linearly move by the rotation of the nut 4, so that the lifting and telescoping of the screw 2 are realized, and the manual adjustment of the height of the diagonal member 9 is achieved.

Specifically, in this embodiment, one end of the screw rod 2 far away from the sleeve 1 is provided with a cavity, the elastic device is arranged in the cavity, and the movable rod 3 is connected with the elastic device after being inserted into the space, so as to realize flexible connection between the movable rod 3 and the screw rod 2.

When the corner fitting 9 is connected with the spaceborne SAR antenna, the elastic device is compressed after the antenna is subjected to gravity, so that the gravity of the antenna is counteracted, and the purpose of protecting the unfolding mechanism of the antenna from damage is achieved.

In this embodiment, to facilitate the rotation of the nut 4, a knurled screen is provided on the outer surface of the nut 4 for increasing the friction force when gripped by a human hand.

In an alternative embodiment, the nut 4 is connected to the sleeve 1 by a collar 17.

In this embodiment, the nut 4 is connected with the sleeve 1 through the retainer ring 17, wherein one end of the retainer ring 17 is rotationally connected with the sleeve 1, and the other end of the retainer ring 17 is fixedly connected with the nut 4, so that the rotational connection between the nut 4 and the sleeve 1 is realized.

In an alternative embodiment, the retainer ring 17 includes an inner ring 19, an outer ring 21, and a connecting ring 20; a connecting groove is formed in the outer wall of the sleeve 1, one end of the inner ring 19 is inserted into the connecting groove, the other end of the inner ring 19 is connected with the connecting ring 20, and the other end of the connecting ring 20 is connected with the outer ring 21; the outer ring 21 is provided with a connecting hole through which a connecting bolt passes to fix the outer ring 21 to the nut 4.

Specifically, in the present embodiment, a connecting groove is provided on the outer wall of the sleeve 1, and the inner end of the inner ring 19 is inserted into the connecting groove, and can rotate around the central axis of the sleeve 1 in the connecting groove.

The inner end of the outer ring 21 is connected with the connecting ring 20, and the outer end of the outer ring 21 is flush with the outer side wall of the nut 4. The side of the outer ring 21 away from the connecting ring 20 is abutted against the end part of the nut 4, and the outer ring 21 is fixedly connected with the nut 4 through bolts, so that the nut 4 and the retainer ring 17 can rotate simultaneously.

One end of the connecting ring 20 is connected with the other end of the inner ring 19, and the other end of the connecting ring 20 is connected with one end of the outer ring 21, so that the sections of the outer ring 21, the connecting ring 20 and the inner ring 19 form a Z shape, namely the inner ring 19 and the outer ring 21 are not on the same plane, and the bearing capacity of the inner ring 19 to the outer ring 21 is increased.

When the telescopic screw rod is used, the nut 4 and the retainer ring 17 simultaneously rotate around the sleeve 1, meanwhile, the nut 4 and the screw rod 2 are in threaded connection, and the nut 4 cannot axially move due to the action of the inner ring 19, so that the screw rod 2 is driven to axially move, the screw rod 2 axially moves relative to the sleeve 1, and the purpose that the screw rod 2 stretches and stretches in the sleeve 1 is achieved.

When the antenna is borne, the adjusting nut 4 moves the screw rod 2 upwards when the height of the antenna is higher, so that the antenna can be connected with the corner fitting 9 at the upper end of the movable rod 3, and the antenna can be supported conveniently; when the height of the antenna is lower, the screw rod 2 is downwards moved by the adjusting nut 4, so that the antenna can be connected with the corner fitting 9 at the upper end of the movable rod 3, and the antenna can be supported conveniently.

In an alternative embodiment, the inner ring 19 and the outer ring 21 are arranged in parallel, and the connecting ring 20 is perpendicular to the inner ring 19.

Specifically, in this embodiment, the inner ring 19 and the outer ring 21 are disposed in parallel, so that the supporting force of the retainer ring 17 on the nut 4 is relatively large, stability of the nut 4 is ensured, and installation of the retainer ring 17 is facilitated.

In an alternative embodiment, balls 18 are provided between the nut 4 and the sleeve 1.

A rolling groove is formed between the nut 4 and the sleeve 1, and the balls 18 are arranged in the rolling groove and respectively abutted against the sleeve 1 and the nut 4, so that the friction force between the nut 4 and the sleeve 1 can be reduced, and the nut 4 can be screwed conveniently.

In this embodiment, the rolling groove may be provided at the end of the sleeve 1, at the end of the nut 4, or on both the sleeve 1 and the nut 4, and disposed correspondingly.

In an alternative embodiment, a limit threaded hole 10 is formed in the side wall of the sleeve 1, a first limit bolt 8 is arranged in the limit hole, and the end part of the first limit bolt 8 passes through the limit threaded hole 10 and then is connected with the screw rod 2.

In this embodiment, the cooperation of spacing screw hole 10 and first stop bolt 8 can realize rotating the location to screw rod 2, avoids screw rod 2 to produce the rotation and skid when flexible, has guaranteed that screw rod 2 can normally stretch out and draw back relative sleeve 1.

In an alternative embodiment, a chute 7 is provided on the side wall of the screw 2, and a first limit bolt 8 is inserted into the chute 7 for limiting the rotation of the screw 2.

Specifically, in this embodiment, the side wall of the screw 2 is provided with the chute 7, and the first limit bolt 8 can be inserted into the chute 7, so as to achieve the purpose of limiting the rotation of the screw 2.

More specifically, in this embodiment, the chute 7 may be a groove structure penetrating the screw 2 and connecting the inside and outside of the screw 2, or may be provided only on the outer surface of the screw 2, so long as it can cooperate with the first limit bolt 8 to realize rotation limit of the screw 2.

In an alternative embodiment, the end of the screw 2 at the end inserted into the sleeve 1 is provided with a guide block 14.

In this embodiment, the guide block 14 is provided at the end of the screw 2, so that the screw 2 can be effectively prevented from shaking during expansion and contraction.

Specifically, in this embodiment, the outer wall of the guide block 14 is attached to the inside of the sleeve 1, and has a certain length, so that the effect of radially limiting the screw 2 can be effectively achieved.

In this embodiment, the guide block 14 is made of a material with a small friction coefficient, such as polytetrafluoroethylene, and the outer cylinder of the guide block is sleeved in the inner hole of the sleeve 1, and the outer diameter of the guide block 14 is larger than the inner diameter of the nut 4, so that the screw 2 and the sleeve 1 can be ensured not to be separated.

In an alternative embodiment, as shown in fig. 5, the elastic means is a compression spring 6; the movable rod 3 is provided with a blocking step 15, and the inside of the screw rod 2 is provided with a blocking ring 16; one end of the pressure spring 6 is abutted with the blocking step 15, and the other end of the pressure spring 6 is abutted with one side of the blocking ring 16.

Specifically, in this embodiment, a cavity is provided at the end of the screw rod 2, a stop ring 16 is provided in the cavity, one side of the stop ring 16, which is close to the movable rod 3, is abutted against one end of the pressure spring 6, and the other end of the pressure spring 6 is abutted against a blocking step 15 on the movable rod 3, so that the pressure spring 6 is limited between the movable step and the stop ring 16.

More specifically, in the present embodiment, the other side of the blocking step 15 is flush with the end face of the screw 2 in the normal state of the compression spring 6.

In an alternative embodiment, the end of the movable rod 3 penetrating through the baffle ring 16 is provided with a second limit bolt 13, and a baffle plate 12 is arranged between the second limit bolt 13 and the baffle ring 16.

In this embodiment, in order to avoid the movable rod 3 from being separated from the screw rod 2, a second limit bolt 13 is disposed at the end of the movable rod 3, and the cap peak of the second limit bolt 13 is larger than the middle hole of the baffle ring 16, so as to achieve the purpose of limiting the highest height of the movable rod 3.

In order to ensure blocking stability between the second limit bolt 13 and the stop ring 16, in this embodiment, a blocking piece 12 is provided between the second limit bolt 13 and the stop ring 16.

The baffle plate 12 has certain rigidity, and can increase the contact area between the second limit bolt 13 and the baffle ring 16, so that the second limit bolt 13 is prevented from being separated from the middle hole of the baffle ring 16.

Specifically, in the present embodiment, a spacer is provided between the blocking piece 12 and the visor of the second limiting bolt 13, so as to reduce friction between the second limiting bolt 13 and the blocking piece 12.

In the present embodiment, the movable rod 3 is provided with the scale 11, and the scale 11 of the movable rod 3 is provided on the side of the blocking step 15 away from the compression spring 6.

In the vertical state, the scale of the 0 position of the movable rod 3 is flush with the end face of the screw rod 2, and the compression amount of the scale can reflect the elastic force born by the pressure spring 6.

The embodiment of the utility model has the beneficial effects that:

through setting up supporting wheel 5 subaerial, support the whole, sleeve 1 and screw rod 2 are flexible adjust the free height of movable rod 3, are connected through resilient means between movable rod 3 and the screw rod 2 for balance antenna's gravity, thereby protect antenna's expansion mechanism not receive the damage.

The ground unfolding brace rod provided by the utility model has a simple structure, is convenient to carry and carry, and can be unfolded at any time to support the antenna on the ground.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The ground unfolding brace of the satellite-borne SAR antenna is characterized by comprising a ground supporting wheel, a sleeve, a screw rod, a movable rod and an elastic device;

one end of the sleeve is connected with the ground supporting wheel, the other end of the sleeve is provided with a nut, and the screw rod is connected with the sleeve through the nut;

the elastic device is arranged in the screw rod, the movable rod is connected with the screw rod through the elastic device, and one end of the movable rod is inserted into the screw rod.

2. The ground deployment brace of the on-board SAR antenna of claim 1, wherein the nut is coupled to the sleeve via a retainer ring.

3. The ground deployment brace of the on-board SAR antenna of claim 2, wherein the retainer ring comprises an inner ring, an outer ring, and a connection ring;

a connecting groove is formed in the outer wall of the sleeve, one end of the inner ring is inserted into the connecting groove, the other end of the inner ring is connected with the connecting ring, and the other end of the connecting ring is connected with the outer ring;

the outer ring is provided with a connecting hole, and the connecting bolt penetrates through the connecting hole to fix the outer ring on the nut.

4. A ground deployment brace in accordance with claim 3, wherein the inner and outer loops are disposed in parallel and the connection loop is perpendicular to the inner loop.

5. The ground deployment brace of the on-board SAR antenna of claim 2, wherein a ball is disposed between the nut and the sleeve.

6. The ground deployment brace of a spaceborne SAR antenna according to claim 1, wherein a limiting threaded hole is provided on the sidewall of the sleeve, a first limiting bolt is provided in the limiting threaded hole, and the end of the first limiting bolt is connected with the screw after passing through the limiting threaded hole.

7. The ground deployment brace of the on-board SAR antenna of claim 6, wherein a chute is provided on a sidewall of the screw, and wherein the first stop bolt is inserted into the chute for limiting rotation of the screw.

8. The ground deployment brace of the on-board SAR antenna of claim 1, wherein an end of the screw inserted into the sleeve is provided with a guide block.

9. The ground deployment brace of a spaceborne SAR antenna of claim 1, wherein said elastic means is a compression spring;

the movable rod is provided with a blocking step, and a baffle ring is arranged in the screw rod;

one end of the pressure spring is abutted with the blocking step, and the other end of the pressure spring is abutted with one side of the blocking ring.

10. The ground deployment brace of the spaceborne SAR antenna of claim 9, wherein a second stop bolt is disposed at an end of the movable rod that passes through the stop ring, and a stop is disposed between the second stop bolt and the stop ring.