Lifting mechanism of ground radar antenna and working method of lifting mechanism

Abstract

The invention discloses a lifting mechanism of a ground radar antenna and a working method thereof, and relates to the technical field of radar antennae, the lifting mechanism comprises a first driving mechanism, a turnover arm and a second driving mechanism; one end of the radar antenna is hinged to an antenna pedestal, and the antenna pedestal is fixedly connected to a working platform of a carrier vehicle; the first driving mechanism and the second driving mechanism are linear reciprocating motion mechanisms, one end of the first driving mechanism is hinged to a radar antenna, the other end of the first driving mechanism is hinged to one end of the overturning arm and one end of the second driving mechanism, the other end of the overturning arm is hinged to the radar antenna, and the radar antenna is hinged to the overturning arm. And the other end of the second driving mechanism is hinged with the antenna pedestal. The device has the advantages that the lifting angle of the radar antenna is increased by adopting the lifting mechanism combining the first driving mechanism and the second driving mechanism, so that the ground radar antenna can be simply and quickly subjected to darkroom testing.

Description

Technical Field

[0001] The present invention relates to the technical field of radar antennas, and in particular to a lifting mechanism of a ground radar antenna and a working method thereof. Background Art

[0002] In order to evaluate the performance of radar antennas, simulate electromagnetic wave tests in different frequency bands, detect and solve problems such as signal interference, reflection, and leakage, and reduce trial and error costs and risks, ground radar antenna darkroom testing is an essential part of the radar product development process. During darkroom testing, the antenna often needs to be lifted to 90 degrees, that is, perpendicular to the ground. At this time, the antenna has better radiation characteristics and can receive and transmit signals more effectively, thereby improving the accuracy of the test. In addition, placing the antenna vertically can reduce the equivalent distributed capacitance and improve test efficiency.

[0003] At present, to conduct darkroom testing of radar antennas, it is generally necessary to first make darkroom testing tooling and fix the antenna to a vertical position for darkroom testing. For example, the patent document with announcement number CN205484572U discloses a radar antenna testing work, which uses horizontal plates and vertical plates that intersect each other vertically and are fixedly connected to fix the radar antenna. This method of fixing the radar antenna by testing tooling not only affects the assembly time of the whole machine, but also increases the cost. Especially for large-caliber radar antennas, the production cost of the testing tooling is high, the cycle is long and it cannot be recycled. For ground radars, the antenna is installed on the working platform, and the antenna is lifted to the working angle by the main cylinder. However, the existing radar antenna main cylinder installation method can only lift the antenna to an angle of about 75 degrees with the antenna seat, and cannot lift the antenna to be perpendicular to the antenna seat. Therefore, it can only be used for the work and transportation of radar antennas, and cannot be used for darkroom testing of radar antennas. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to enable a ground radar antenna to be tested in a darkroom simply and quickly.

[0005] The present invention solves the above technical problems through the following technical means: a lifting mechanism for a ground radar antenna, comprising a first driving mechanism, a flip arm and a second driving mechanism; one end of the radar antenna is hinged on the antenna seat, and the antenna seat is fixedly connected to the working platform of the vehicle; the first driving mechanism and the second driving mechanism are both linear reciprocating motion mechanisms, one end of the first driving mechanism is hinged to the radar antenna, the other end of the first driving mechanism is hinged to one end of the flip arm and one end of the second driving mechanism, the other end of the flip arm is hinged to the radar antenna, and the other end of the second driving mechanism is hinged to the antenna seat. The lifting mechanism combining the first driving mechanism and the second driving mechanism increases the lifting angle of the radar antenna, and the second driving mechanism can realize the conversion of the transport state and the working state of the radar antenna. When the radar antenna is lifted to the working state, the state conversion of the radar antenna test can be realized through the first driving mechanism, so that the ground radar antenna can be tested in a darkroom simply and quickly, greatly reducing the test cost and cycle.

[0006] As an optimized technical solution, the flip arm is an L-shaped structure, with a concave corner facing the portion between the first drive mechanism and the radar antenna, and a convex corner facing the portion between the second drive mechanism and the radar antenna.

[0007] As an optimized technical solution, the hinged position of the flip arm on the radar antenna is closer to the end of the radar antenna hinged on the antenna base than the hinged position of the first driving mechanism on the radar antenna.

[0008] As an optimized technical solution, the first driving mechanism includes a first cylinder body and a first push rod, the first push rod is used for linear reciprocating motion in the first cylinder body, the first push rod is hinged to the radar antenna, and the first cylinder body is hinged to the flip arm and the second driving mechanism.

[0009] As an optimized technical solution, the first driving mechanism further includes a fixing mechanism, which is used to fix the first cylinder body and the first push rod. The fixing mechanism can ensure that the first push rod cannot move during transportation. At this time, the first driving mechanism is equivalent to a two-force rod, which plays a role in supporting and relieving the radar antenna, thereby reducing the force on the radar antenna.

[0010] As an optimized technical solution, the fixing mechanism includes a connecting plate, a bolt and a nut. The two connecting plates are respectively fixedly connected to the outer periphery of the first cylinder body and the first push rod. The bolt is used to pass through the two connecting plates, and the nut is used to be threadedly connected to the bolt by the outer end of the connecting plate.

[0011] As an optimized technical solution, the second driving mechanism includes a second push rod and a second cylinder body, the second push rod is used to reciprocate linearly in the second cylinder body, the second push rod is hinged to the first driving mechanism and the flip arm, and the second cylinder body is hinged to the antenna base.

[0012] As an optimized technical solution, the lifting mechanism of the ground radar antenna also includes a first support ear, a first rotating shaft, a second rotating shaft, a third rotating shaft and a second support ear, the first support ear and the second support ear are both fixedly connected to the radar antenna, the first driving mechanism is hinged to the radar antenna through the first support ear and the first rotating shaft and is hinged to the flip arm and the second driving mechanism through the second rotating shaft, and the flip arm is hinged to the radar antenna through the second support ear and the third rotating shaft.

[0013] As an optimized technical solution, the first support ear and the second support ear are both double support ear structures; both ends of the first driving mechanism are provided with double support ear structures, and the first rotating shaft is rotatably matched with the first support ear and the double support ear structure on the first driving mechanism; both ends of the flip arm are provided with double support ear structures, and the third rotating shaft is rotatably matched with the second support ear and the double support ear structure on the flip arm; the second driving mechanism is provided with a single support ear structure, and the second rotating shaft is rotatably matched with the double support ear structure on the first driving mechanism, the double support ear structure on the flip arm and the single support ear structure on the second driving mechanism.

[0014] A method for operating a lifting mechanism of a ground radar antenna, using the lifting mechanism of the ground radar antenna described in any of the above schemes, comprises the following steps:

[0015] During transportation, the first driving mechanism and the second driving mechanism are both retracted to their shortest positions, so that the radar antenna remains parallel to the antenna base;

[0016] When working, the radar antenna is lifted to an acute angle with the antenna base by extending the second driving mechanism, and the first driving mechanism is still retracted to the shortest position;

[0017] During the test, the second driving mechanism is first extended to lift the radar antenna to an acute angle with the antenna base, and then the first driving mechanism is extended to lift the radar antenna to be perpendicular to the antenna base.

[0018] The advantages of the present invention are:

[0019] 1. The lifting mechanism combining the first driving mechanism and the second driving mechanism is adopted to increase the lifting angle of the radar antenna. The second driving mechanism can realize the conversion of the radar antenna transportation state and the working state. When the radar antenna is lifted to the working state, the first driving mechanism can realize the state conversion of the radar antenna test, so that the ground radar antenna can be tested in the darkroom simply and quickly, which greatly reduces the test cost and cycle.

[0020] 2. The fixing mechanism can ensure that the first push rod cannot move during transportation. At this time, the first driving mechanism is equivalent to a two-force rod, which plays a role in supporting and relieving the force of the radar antenna, thereby reducing the force on the radar antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front schematic diagram of the transportation state of the lifting mechanism of the ground radar antenna according to an embodiment of the present invention.

[0022] Figure 2 It is a front view schematic diagram of the working state of the lifting mechanism of the ground radar antenna according to an embodiment of the present invention.

[0023] Figure 3 It is a schematic front view of the test state of the lifting mechanism of the ground radar antenna according to an embodiment of the present invention.

[0024] Figure 4 It is an axial schematic diagram of a lifting mechanism of a ground radar antenna according to an embodiment of the present invention.

[0025] Figure 5 The figure is a bottom view schematic diagram of the lifting mechanism of the ground radar antenna according to an embodiment of the present invention.

[0026] Figure 6 It is a front view schematic diagram of the first driving mechanism according to an embodiment of the present invention.

[0027] Figure 7 It is a schematic isometric view of a flip arm according to an embodiment of the present invention.

[0028] Figure 8 Schematic diagram of an axonometric view of a second driving mechanism according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0030] like Figures 1 to 5 As shown, an embodiment of the present invention discloses a lifting mechanism of a ground radar antenna, comprising a first support ear 1, a first driving mechanism 2, a flip arm 3, a second driving mechanism 4, a first rotating shaft 5, a second rotating shaft 6, a third rotating shaft 7 and a second support ear 8. One end of a radar antenna 9 is hinged on an antenna base 10, and the antenna base 10 is fixedly connected to a working platform 12 of a vehicle 11. The lifting mechanism of the ground radar antenna is connected between the antenna base 10 and the radar antenna 9.

[0031] The first driving mechanism 2 and the second driving mechanism 4 are both linear reciprocating mechanisms, such as oil cylinders, electric cylinders, gas cylinders, etc. One end of the first driving mechanism 2 is hinged to the radar antenna 9 through the first support ear 1 and the first rotating shaft 5, the other end of the first driving mechanism 2 is hinged to one end of the flip arm 3 and one end of the second driving mechanism 4 through the second rotating shaft 6, the other end of the flip arm 3 is hinged to the radar antenna 9 through the second support ear 8 and the third rotating shaft 7, the other end of the second driving mechanism 4 is hinged to the antenna base 10, and the hinge position of the flip arm 3 on the radar antenna 9 is closer to the end of the radar antenna 9 hinged on the antenna base 10 than the hinge position of the first driving mechanism 2 on the radar antenna 9.

[0032] The first ear 1 and the second ear 8 are both welded at appropriate positions on the radar antenna 9, and the first ear 1 and the second ear 8 are both double ear structures used in pairs on the left and right; both ends of the first driving mechanism 2 are provided with double ear structures, and the first rotating shaft 5 is rotatably matched with the double ear structures on the first ear 1 and the first driving mechanism 2; both ends of the flip arm 3 are provided with double ear structures, and the third rotating shaft 7 is rotatably matched with the second ear 8 and the double ear structures on the flip arm 3; both ends of the second driving mechanism 4 are provided with single ear structures, and the second rotating shaft 6 is rotatably matched with the double ear structures on the first driving mechanism 2, the double ear structures on the flip arm 3 and the single ear structures on the second driving mechanism 4.

[0033] like Figures 1 to 3 , Figure 6 As shown, the first driving mechanism 2 adopts an oil cylinder, and the first driving mechanism 2 includes a first cylinder body 21, a fixing mechanism 22 and a first push rod 23; the first push rod 23 is used for linear reciprocating motion in the first cylinder body 21, the first push rod 23 is hinged to the radar antenna 9 through the first support ear 1 and the first rotating shaft 5, and the first cylinder body 21 is hinged to the flip arm 3 and the second driving mechanism 4 through the second rotating shaft 6; the fixing mechanism 22 is used to fix the first cylinder body 21 and the first push rod 23 to ensure that the first push rod 23 cannot move during transportation. At this time, the first driving mechanism 2 is equivalent to a two-force rod, which plays a role in supporting and relieving the radar antenna 9, and can reduce the force on the radar antenna 9; the fixing mechanism 22 includes a connecting plate, a bolt and a nut, and the two connecting plates are fixedly connected to the outer periphery of the first cylinder body 21 and the first push rod 23 respectively, the bolt is used to pass through the two connecting plates, and the nut is used to be threadedly connected to the bolt by the outer end of the connecting plate.

[0034] like Figures 1 to 3 , Figure 7 As shown, the flip arm 3 is an L-shaped structure, with its concave corner facing the portion between the first driving mechanism 3 and the radar antenna 9 , and its convex corner facing the portion between the second driving mechanism 4 and the radar antenna 9 .

[0035] like Figures 1 to 3 , Figure 8As shown, the second driving mechanism 4 adopts an oil cylinder, and the second driving mechanism 4 includes a second push rod 41 and a second cylinder body 42; the second push rod 41 is used for linear reciprocating motion in the second cylinder body 42, the second push rod 41 is hinged to the flip arm 3 and the second driving mechanism 4 through the second rotating shaft 6, and the second cylinder body 42 is hinged to the antenna base 10.

[0036] The embodiment of the present invention further discloses a working method of a lifting mechanism of a ground radar antenna, which adopts the lifting mechanism of the ground radar antenna and includes the following steps:

[0037] During transportation, the first driving mechanism 2 and the second driving mechanism 4 are both shortened to their shortest, so that the radar antenna 9 and the antenna base 10 remain parallel. At this time, the first cylinder 21 and the first push rod 23 are fixedly connected by the fixing mechanism 22.

[0038] During operation, the fixing mechanism 22 is released, and the radar antenna 9 is lifted up to an acute angle with the antenna base 10 by extending the second driving mechanism 4. At this time, the first driving mechanism 2 is still retracted to the shortest position.

[0039] During the test, the second driving mechanism 4 is extended to lift the radar antenna 9 to an acute angle with the antenna base 10 , and then the first driving mechanism 2 is extended to lift the radar antenna 9 to be perpendicular to the antenna base 10 .

[0040] Working principle: A lifting mechanism combining the first driving mechanism 2 and the second driving mechanism 4 is adopted to increase the lifting angle of the radar antenna 9. The second driving mechanism 4 can realize the conversion of the transportation state and the working state of the radar antenna 9. When the radar antenna 9 is lifted to the working state, the state conversion of the radar antenna 9 test can be realized through the first driving mechanism 2, so that the ground radar antenna can be tested in the darkroom simply and quickly, which greatly reduces the test cost and cycle.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lifting mechanism for a ground radar antenna, characterized in that: It includes a first driving mechanism, a flip arm and a second driving mechanism; one end of the radar antenna is hinged on the antenna seat, and the antenna seat is fixedly connected to the working platform of the vehicle; the first driving mechanism and the second driving mechanism are both linear reciprocating motion mechanisms, one end of the first driving mechanism is hinged to the radar antenna, the other end of the first driving mechanism is hinged to one end of the flip arm and one end of the second driving mechanism, the other end of the flip arm is hinged to the radar antenna, and the other end of the second driving mechanism is hinged to the antenna seat.

2. The lifting mechanism of the ground radar antenna according to claim 1, characterized in that: The flip arm is an L-shaped structure, with a concave corner facing the portion between the first driving mechanism and the radar antenna, and a convex corner facing the portion between the second driving mechanism and the radar antenna.

3. The lifting mechanism of the ground radar antenna according to claim 1, characterized in that: The hinged position of the flip arm on the radar antenna is closer to the end of the radar antenna hinged on the antenna base than the hinged position of the first driving mechanism on the radar antenna.

4. The lifting mechanism of the ground radar antenna according to claim 1, characterized in that: The first driving mechanism includes a first cylinder body and a first push rod, the first push rod is used for linear reciprocating motion in the first cylinder body, the first push rod is hinged to the radar antenna, and the first cylinder body is hinged to the flip arm and the second driving mechanism.

5. The lifting mechanism of the ground radar antenna according to claim 4, characterized in that: The first driving mechanism further includes a fixing mechanism, and the fixing mechanism is used to fix the first cylinder body and the first push rod.

6. The lifting mechanism of the ground radar antenna according to claim 5, characterized in that: The fixing mechanism includes a connecting plate, a bolt and a nut. The two connecting plates are respectively fixedly connected to the outer periphery of the first cylinder body and the first push rod. The bolt is used to pass through the two connecting plates. The nut is used to be threadedly connected to the bolt at the outer end of the connecting plate.

7. The lifting mechanism of the ground radar antenna according to claim 1, characterized in that: The second driving mechanism comprises a second push rod and a second cylinder body, the second push rod is used for linear reciprocating motion in the second cylinder body, the second push rod is hinged to the first driving mechanism and the flip arm, and the second cylinder body is hinged to the antenna seat.

8. The lifting mechanism of the ground radar antenna according to claim 1, characterized in that: The lifting mechanism of the ground radar antenna also includes a first lug, a first rotating shaft, a second rotating shaft, a third rotating shaft and a second lug, wherein the first lug and the second lug are both fixedly connected to the radar antenna, the first driving mechanism is hinged to the radar antenna through the first lug and the first rotating shaft and is hinged to the flip arm and the second driving mechanism through the second rotating shaft, and the flip arm is hinged to the radar antenna through the second lug and the third rotating shaft.

9. The lifting mechanism of the ground radar antenna according to claim 8, characterized in that: The first support ear and the second support ear are both double support ear structures; both ends of the first driving mechanism are provided with double support ear structures, and the first rotating shaft is rotatably matched with the first support ear and the double support ear structure on the first driving mechanism; both ends of the flip arm are provided with double support ear structures, and the third rotating shaft is rotatably matched with the second support ear and the double support ear structure on the flip arm; the second driving mechanism is provided with a single support ear structure, and the second rotating shaft is rotatably matched with the double support ear structure on the first driving mechanism, the double support ear structure on the flip arm and the single support ear structure on the second driving mechanism.

10. A method for operating a lifting mechanism of a ground radar antenna, characterized in that: The lifting mechanism of the ground radar antenna according to any one of claims 1 to 9 comprises the following steps: During transportation, the first driving mechanism and the second driving mechanism are both retracted to their shortest positions, so that the radar antenna remains parallel to the antenna base; When working, the radar antenna is lifted to an acute angle with the antenna base by extending the second driving mechanism, and the first driving mechanism is still retracted to the shortest position; During the test, the second driving mechanism is first extended to lift the radar antenna to an acute angle with the antenna base, and then the first driving mechanism is extended to lift the radar antenna to be perpendicular to the antenna base.

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