A support frame for Beidou antenna testing

Abstract

The present invention discloses a support frame for testing a Beidou antenna, comprising a base, a mounting rod fixedly connected to the middle portion of the upper end of the base, an electric telescopic push rod fixedly connected to the middle portion of the upper end of the mounting rod, a placement cavity for mounting a Beidou antenna fixedly connected to the upper end of the electric telescopic push rod, symmetrical grooves formed on the lower sidewalls of the base, a rotating plate rotatably connected between the sidewalls of the grooves, a limiting groove formed on the upper end of the rotating plate near the base, a limiting mechanism for limiting and fixing the rotating plate is provided in the middle portion of the upper end of the base, and when the input end of the limiting mechanism rotates, its output end moves horizontally away from the limiting groove. The present invention can simultaneously drive multiple L-shaped rods to synchronously move away from the limiting groove by rotating a second circular plate, thereby simultaneously releasing the limits on the multiple rotating plates, and when the multiple rotating plates are in a horizontal state, the multiple L-shaped rods can simultaneously support the rotating plates.

Description

Technical Field

[0001] The present invention relates to the technical field of antenna testing, and in particular to a support frame for Beidou antenna testing. Background Art

[0002] Beidou antennas usually need to undergo electromagnetic compatibility radiated emission (RE) testing before being put into use. This test is required whether it is ground-based, ship-based, or airborne. It can be said that it is a key indicator for measuring an electronic device or subsystem.

[0003] For example, Chinese patent publication No. CN218275073U discloses a test antenna bracket, which includes: a movable base; a fixed rod, which is vertically arranged on the movable base; a movable rod assembly, which is vertically movably arranged on the fixed rod, and is used to support the antenna; a drive assembly, which is arranged on the movable base; and a transmission assembly, which respectively transmits and connects the drive assembly and the movable rod assembly to drive the movable rod to move vertically.

[0004] In this solution, the entire bracket is driven to move by rollers, but the rollers are not limited when stationary. As a result, during the antenna testing process, if the wind speed in the environment is high or the tester collides with the bracket during the test, the bracket may move, requiring the tester to repeatedly align the bracket to the preset test position. Summary of the Invention

[0005] The purpose of the present invention is to provide a support frame for Beidou antenna testing to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A support frame for Beidou antenna testing includes a base, a mounting rod is fixedly connected to the middle part of the upper end of the base, an electric telescopic push rod is fixedly connected to the middle part of the upper end of the mounting rod, and the upper end of the electric telescopic push rod is fixedly connected to a placement cavity for installing the Beidou antenna. Symmetrical grooves are provided on the lower side walls of the base, and a rotating plate is rotatably connected between the side walls of the grooves. A limiting groove is provided on the side of the upper end of the rotating plate close to the base, and a limiting mechanism for limiting and fixing the rotating plate is provided in the middle part of the upper end of the base. When the input end of the limiting mechanism rotates, its output end will horizontally move away from the limiting groove.

[0008] As a further solution of the present invention: the limiting mechanism includes a second circular plate, the lower part of the second circular plate is rotatably connected to the base, the upper end of the base is provided with a first annular groove for cooperating with the second circular plate, the lower part of the second circular plate is rotatably connected in the first annular groove, the end of the second circular plate away from the base is fixedly connected to a gear ring, the end of the gear ring away from the second circular plate is fixedly connected to the first circular plate, the inner cavity diameters of the first circular plate and the second circular plate are equal, and the inner cavity diameter of the second circular plate is smaller than the inner cavity diameter of the gear ring.

[0009] As a further solution of the present invention: a first clamping block is provided between the first circular plate and the second circular plate, the upper and lower ends of the first clamping block are respectively fitted with the first circular plate and the second circular plate, the first clamping block is slidably connected to the middle part of one side close to the mounting rod, the outer wall of the first balance rod is sleeved with a first spring, the two ends of the first spring are fixedly connected to the first clamping block and the side wall of the mounting rod, and a handle is fixedly connected to the side wall of one side of the upper end of the first circular plate.

[0010] As a further solution of the present invention: the upper part of the inner cavity of the groove is horizontally slidably connected with a symmetrical L-shaped rod, the number and position of the L-shaped rods correspond to the number and position of the rotating plates, the L-shaped rod is composed of a horizontal rod and a vertical rod, the middle part of the upper end of the vertical rod is fixedly connected with a guide rod, the plane where the upper end of the guide rod is located is lower than the plane where the bottom of the inner cavity of the first annular groove is located, the lower end of the second circular plate is provided with a guide groove used to cooperate with the guide rod, and the upper end of the guide rod is slidably connected to the inner cavity of the guide groove.

[0011] As a further solution of the present invention: the lower part of the end of the rotating plate away from the base is rotatably connected to the connecting rod, the middle part of the lower end of the connecting rod is rotatably connected to the wheel, the lower part of the inner cavity of the connecting rod is vertically slidably connected to the brake block, the middle part of the upper end of the brake block is fixedly connected to the fixing rod, the upper end of the fixing rod passes through the top of the connecting rod and extends into the inner cavity of the rotating plate, and the upper end of the fixing rod is fixedly connected to the driven block.

[0012] As a further solution of the present invention: the driven block is movably connected to the side of the rotating plate inner cavity away from the base, the upper outer wall of the driven block is provided with an arc-shaped surface, and a push plate is provided on the side of the driven block close to the base, the upper end of the push plate is horizontally slidably connected to the top of the rotating plate inner cavity, the lower end of the push plate is fixedly connected to the second rack, and a gear is provided below the second rack, the gear is rotatably connected to the side wall of the rotating plate inner cavity, a first rack is provided below the second rack, the first rack is slidably connected to the bottom of the rotating plate inner cavity, the second rack and the first rack are both meshed with the gear, and the push plate is provided with an inclined surface on the side close to the driven block.

[0013] As a further solution of the present invention: a second annular groove is provided in the middle of the lower end of the driven block, and a symmetrical conical block is provided below the second annular groove. The bottom of the symmetrical conical block is fixedly connected to the bottom of the inner cavity of the rotating plate. The lower end of the driven block is rotatably connected to a circular ring, and the lower end of the circular ring is vertically slidably connected to a symmetrical second balance rod, the lower end of the second balance rod is fixedly connected to the bottom of the inner cavity of the rotating plate, and the outer wall of the second balance rod is sleeved with a second spring.

[0014] As a further solution of the present invention: the end of the rack away from the driven block is fixedly connected to a moving block, the lower end of the moving block is horizontally slidably connected to the bottom of the inner cavity of the turn plate, the end of the moving block away from the first rack is elastically connected to the side wall of the inner cavity of the turn plate through a third spring, the middle part of the side of the moving block away from the first rack is fixedly connected to a rope, the middle part of the lower end of the base is fixedly connected to a moving column, the end of the rope away from the moving block passes through the middle part of the side of the lower end of the turn plate close to the base, and is fixedly connected to the lower end side wall of the moving column, and the lower part of the inner cavity side wall of the groove is fixedly connected to an arc block.

[0015] As a further solution of the present invention: the movable column is vertically slidably connected to the lower part of the inner cavity of the mounting rod, the upper end of the movable column is fixedly connected to a support rod, the middle part of the inner cavity of the first circular plate is fixedly connected to a symmetrical driving rod, the end of the driving rod away from the outer wall of the movable column is slidably connected, the outer wall of the mounting rod is provided with an adapter groove for cooperating with the driving rod, the outer wall of the movable column is provided with a No. 1 groove for cooperating with the driving rod, and one end of the No. 1 groove is provided with a No. 2 groove.

[0016] As a further solution of the present invention: a balancing groove is opened on one side of the guide groove, the balancing groove is slidably connected to the guide rod, and the horizontal distances from both ends of the balancing groove to the center of the first circular plate are equal.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By rotating the second circular plate, multiple L-shaped rods can be driven to move away from the limit slots simultaneously, thereby releasing the limits on multiple rotating plates at the same time, and when multiple rotating plates are in a horizontal state, multiple L-shaped rods can support the rotating plates at the same time. When the first rack moves toward the direction of the base, it pushes the driven block to move down, thereby driving the brake block to move down and contact the wheel, and then limiting the wheel through friction. During the clockwise rotation of the handle, the driving rod will enter the inside, and the movement remains stable and does not move. During the counterclockwise rotation of the handle from the initial position, the driving rod will enter the No. 2 slot, thereby driving the moving column to move up, thereby driving the rope to move through the moving column. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the overall storage state in the present invention.

[0021] Figure 3 For the present invention Figure 2 Schematic diagram of the structure of area A.

[0022] Figure 4 It is a structural schematic diagram of the limiting mechanism in the present invention.

[0023] Figure 5 Schematic diagram of the structure of the L-shaped rod in the present invention.

[0024] Figure 6 Schematic diagram of the structure of the second circular plate in the present invention.

[0025] Figure 7 Schematic diagram of the structure of the groove in the present invention.

[0026] Figure 8 It is a structural schematic diagram of the driven block in the present invention.

[0027] Figure 9 It is a schematic diagram of the bottom structure of the driven block in the present invention.

[0028] Figure 10 Schematic diagram of the structure of the movable column in the present invention.

[0029] In the figure: 1. base; 2. mounting rod; 3. electric telescopic push rod; 4. placement cavity; 5. first circular plate; 6. gear ring; 7. second circular plate; 8. handle; 9. groove; 10. first clamping block; 11. first balancing rod; 12. guide groove; 13. limit groove; 14. rotating plate; 15. first annular groove; 16. L-shaped rod; 17. guide rod; 18. connecting rod; 19. fixing rod; 20. brake block; 21. driven block; 22. push plate; 23. first rack; 24. gear; 25. second rack; 26. moving block; 27. rope; 28. ring; 29. second balancing rod; 30. second annular groove; 31. conical block; 32. moving column; 33. arc block; 34. support rod; 35. balancing groove; 36. adapter groove; 37. No. 1 groove; 38. No. 2 groove; 39. driving rod. DETAILED DESCRIPTION

[0030] See also Figure 1-3In an embodiment of the present invention, a support frame for testing a Beidou antenna includes a base 1, a mounting rod 2 is fixedly connected to the middle part of the upper end of the base 1, an electric telescopic push rod 3 is fixedly connected to the middle part of the upper end of the mounting rod 2, and the upper end of the electric telescopic push rod 3 is fixedly connected to a placement cavity 4 for installing a Beidou antenna. Symmetrical grooves 9 are provided on the lower side walls of the base 1, and a rotating plate 14 is rotatably connected between the side walls of the grooves 9. A limiting groove 13 is provided on the side of the upper end of the rotating plate 14 close to the base 1, and a limiting mechanism for limiting and fixing the rotating plate 14 is provided in the middle part of the upper end of the base 1. When the input end of the limiting mechanism rotates, its output end will be horizontally away from the limiting groove 13.

[0031] See also Figure 4-6 The limiting mechanism includes a second circular plate 7, the lower part of the second circular plate 7 is rotatably connected to the base 1, and the upper end of the base 1 is provided with a first annular groove 15 for cooperating with the second circular plate 7. The lower part of the second circular plate 7 is rotatably connected to the first annular groove 15, and the end of the second circular plate 7 away from the base 1 is fixedly connected to the gear ring 6, and the end of the gear ring 6 away from the second circular plate 7 is fixedly connected to the first circular plate 5. The inner cavity diameters of the first circular plate 5 and the second circular plate 7 are equal, and the inner cavity diameter of the second circular plate 7 is smaller than the inner cavity diameter of the gear ring 6. A first clamping block 10 is provided between the first circular plate 5 and the second circular plate 7, and the upper and lower ends of the first clamping block 10 are respectively fitted with the first circular plate 5 and the second circular plate 7. The middle part of the first clamping block 10 close to the side of the mounting rod 2 is slidably connected to the first balance bar 11, and the outer wall of the first balance bar 11 is provided with a first spring, and the two ends of the first spring are fixed Connected to the side wall of the first clamping block 10 and the mounting rod 2, the end of the first clamping block 10 away from the first balance rod 11 is engaged with the inner cavity side wall of the gear ring 6, that is, the first spring pushes the first clamping block 10 to fit with the inner cavity side wall of the gear ring 6, thereby elastically limiting the gear ring 6 through the first clamping block 10, and one side wall of the upper end of the first circular plate 5 is fixedly connected to a handle 8, and the gear ring 6 can be driven to rotate synchronously by rotating the handle 8. During the rotation of the gear ring 6, the first clamping block 10 will continue to move back and forth horizontally, and after the gear ring 6 rotates clockwise, the elastically connected first clamping block 10 will again limit and fix the position of the gear ring 6, and the upper part of the inner cavity of the groove 9 is horizontally slidably connected with a symmetrical L-shaped rod 16. The number and position of the L-shaped rod 16 correspond to the number and position of the rotating plate 14, and the L-shaped rod 16 is composed of a horizontal rod and a vertical rod.

[0032] When the handle 8 is not rotated, the guide rod 17 is located in the inner cavity of the guide groove 12 away from the mounting rod 2. After the second circular plate 7 is rotated clockwise with the handle 8, the guide rod 17 will move relatively to the end of the inner cavity of the guide groove 12 close to the mounting rod 2, thereby driving the L-shaped rod 16 to move horizontally toward the direction of the mounting rod 2, so that the horizontal rod is separated from the limiting groove 13, thereby releasing the limit of the rotating plate 14, and then the rotating plate 14 can be rotated from the vertical state to the horizontal state, and when rotating. When the plate 14 is in the horizontal state, the second circular plate 7 is rotated counterclockwise to reset it, which can drive the L-shaped rod 16 to move horizontally away from the position of the mounting rod 2, so that the upper end surface of the horizontal rod is in contact with the lower end surface of the rotating plate 14, thereby supporting the rotating plate 14, thereby avoiding that the rotating plate 14 rotates toward the direction of the mounting rod 2 due to its own weight during the process of pulling the device downward, which causes the need to adjust the position of the rotating plate 14 multiple times, thereby affecting the test of the Beidou antenna and causing a waste of test time. By rotating the second circular plate 7, multiple L-shaped rods 16 can be driven to move away from the limit slots 13 at the same time, thereby releasing the limit of multiple rotating plates 14 at the same time, and when multiple rotating plates 14 are in the horizontal state, multiple L-shaped rods 16 can support the rotating plate 14 at the same time, that is, by repeatedly rotating the second circular plate 7, the rotating plate 14 in the horizontal and vertical states can be limited or released.

[0033] See also Figure 7-9The lower part of the rotating plate 14 is rotated to connect the connecting rod 18 at one end away from the base 1, and the middle part of the lower end of the connecting rod 18 is rotatably connected to the wheel, and the lower part of the inner cavity of the connecting rod 18 is vertically slidably connected to the brake shoe 20, and the middle part of the upper end of the brake shoe 20 is fixedly connected to the fixing rod 19. Since the fixing rod 19 and the brake shoe 20 are vertically slidably connected to the connecting rod 18, the fixing rod 19 and the brake shoe 20 are driven to rotate synchronously during the rotation of the connecting rod 18. That is, regardless of whether the connecting rod 18 rotates or not, the brake shoe 20 will contact the outer wall of the wheel after moving down, thereby limiting the rotation of the wheel, thereby preventing the wheel from moving due to external force during the Beidou antenna test, thereby causing the position of the antenna to deviate from the preset position, thereby affecting the test effect of the antenna. The upper end of the fixing rod 19 passes through the top of the connecting rod 18 and extends into the inner cavity of the rotating plate 14. The upper end of the fixing rod 19 is fixedly connected to a driven block 21, which is movably connected to the side of the inner cavity of the rotating plate 14 away from the base 1. , the upper outer wall of the driven block 21 is provided with an arc surface, and a push plate 22 is provided on the side of the driven block 21 close to the base 1. The upper end of the push plate 22 is horizontally slidably connected to the top of the inner cavity of the rotating plate 14, and the lower end of the push plate 22 is fixedly connected to the second rack 25. A gear 24 is provided below the second rack 25. The gear 24 is rotatably connected to the side wall of the inner cavity of the rotating plate 14. A first rack 23 is provided below the second rack 25. The first rack 23 is slidably connected to the bottom of the inner cavity of the rotating plate 14. The second rack 25 and the first rack 23 are slidably connected to the bottom of the inner cavity of the rotating plate 14. Each rack 23 is meshed with the gear 24. When the first rack 23 moves toward the direction of the base 1, it will drive the gear 24 to rotate, thereby driving the second rack 25 to move horizontally in the direction of the driven block 21, thereby driving the push plate 22 to move horizontally. The push plate 22 is provided with an inclined surface on the side close to the driven block 21. After the inclined surface contacts the arc surface, it pushes the driven block 21 to move downward, thereby driving the brake block 20 to move downward and contact with the wheel, and then limiting the wheel through friction.

[0034] A second annular groove 30 is provided in the middle portion of the lower end of the driven block 21, and a symmetrical conical block 31 is provided below the second annular groove 30. The bottom of the symmetrical conical block 31 is fixedly connected to the bottom of the inner cavity of the rotating plate 14. The top length of the conical block 31 is smaller than the width of the inner cavity of the second annular groove 30, while the bottom length of the conical block 31 is larger than the width of the inner cavity of the second annular groove 30. That is, after the driven block 21 moves downward, the conical block 31 and the second annular groove 30 will abut against each other to limit the driven block 21, thereby limiting the rotation of the driven block 21, and then limiting the rotation of the connecting rod 18 by the fixing rod 19 and the brake block 20. Through the cooperation of the second annular groove 30 and the conical block 31, the conical block 31 can limit the second annular groove 30 regardless of the rotation angle of the driven block 21. The lower end of the driven block 21 is rotatably connected to a ring 28, and the lower end of the ring 28 is vertically slidably connected to a symmetrical second balance bar 29. The lower end of the second balance bar 29 is fixedly connected to the bottom of the inner cavity of the rotating plate 14, and the outer wall of the second balance bar 29 is provided with a second spring. The two ends of the second spring are respectively fixedly connected to the ring 28 and the bottom of the inner cavity of the rotating plate 14. After the driven block 21 moves downward, it will push the ring 28 to move downward along the second balance bar 29 synchronously. After the push plate 22 is separated from the driven block 21, the second spring will push the ring 28 to move upward, thereby driving the driven block 21 to move upward, and then driving the brake block 20 to separate from the wheel. The end of the first rack 23 away from the driven block 21 is fixedly connected to the moving block 26, and the lower end of the moving block 26 slides horizontally with the bottom of the inner cavity of the rotating plate 14 The end of the moving block 26 away from the first rack 23 is elastically connected to the inner cavity side wall of the rotating plate 14 by a third spring. The middle part of the side of the moving block 26 away from the first rack 23 is fixedly connected with a rope 27. The middle part of the lower end of the base 1 is fixedly connected to a moving column 32. The end of the rope 27 away from the moving block 26 passes through the middle part of the side of the lower end of the rotating plate 14 close to the base 1 and is fixedly connected to the lower end side wall of the moving column 32. The lower part of the inner cavity side wall of the groove 9 is fixedly connected with an arc block 33. The arc block 33 is located below the L-shaped rod 16. The position of the rope 27 can be limited by the setting of the arc block 33, so as to avoid the rope 27 being tightly attached to the lower end of the horizontal rod after being pulled tight, thereby affecting the movement of the L-shaped rod 16. The column 32 is vertically slidably connected to the lower part of the inner cavity of the mounting rod 2, and the upper end of the movable column 32 is fixedly connected to the support rod 34. The middle part of the inner cavity of the first circular plate 5 is fixedly connected to a symmetrical driving rod 39. The end of the driving rod 39 away from 6 is slidably connected to the outer wall of the movable column 32. The outer wall of the mounting rod 2 is provided with an adapter groove 36 for use with the driving rod 39. The outer wall of the movable column 32 is provided with a No. 1 groove 37 for use with the driving rod 39. One end of the No. 1 groove 37 is provided with a No. 2 groove 38. The No. 2 groove 38 is inclined. When the handle 8 is in the initial state, the driving rod 39 is located at the connection between the No. 1 groove 37 and the No. 2 groove 38. During the clockwise rotation of the handle 8, the driving rod 39 will enter 37. At this time, the movable column 32 remains stable and does not move.During the counterclockwise rotation of the handle 8 from the initial position, the driving rod 39 will enter the second slot 38, thereby driving the movable column 32 to move upward, thereby driving the rope 27 to move through the movable column 32, and then driving the first rack 23 to move through the rope 27, thereby causing the driven block 21 to move downward to limit the wheel and the connecting rod 18. The first clamping block 10 will limit the rotated gear ring 6, thereby limiting the upward moving column 32. A balancing groove 35 is provided on one side of the guide groove 12. During the counterclockwise rotation of the second circular plate 7 along with the gear ring 6, the guide rod 17 will enter the balancing groove 35 from the connection between the guide groove 12 and the balancing groove 35. After the guide rod 17 enters the inner cavity of the balancing groove 35, the position of the guide rod 17 will not change. Therefore, during the testing of the Beidou antenna, the wheel and the connecting rod 18 can be continuously limited.

[0035] See also Figure 10 After the Beidou antenna test is completed, the handle 8 is turned again so that the handle 8 drives the gear ring 6 and the driving rod 39 to reset, thereby moving the movable column 32 downward, thereby releasing the limit of the wheel and releasing the limit of the movable column 32, thereby causing the driven block 21 to return to the initial position, and then the second circular plate 7 can be driven by the handle 8 to rotate, so that the upper end surface of the horizontal rod is separated from the lower end surface of the rotating plate 14 in the horizontal state, so that the rotating plate 14 can be rotated to the vertical state again, and the horizontal rod can be clamped in the limiting groove 13 again, and the rotating plate 14 in the vertical state is more convenient to store and carry, thereby making the Beidou antenna test more convenient, and when the rotating plate 14 is in the vertical state, the rope 27 is in a loose state and separated from the lower end surface of the arc block 33, and when the rotating plate 14 is in the horizontal state, the rope 27 will contact the lower end surface of the arc block 33.

Claims

1. A support frame for Beidou antenna testing, including a base, characterized in that: The cam is fixedly provided with a mounting rod at the middle portion of the upper end of the base, and the upper end of the mounting rod is fixedly connected with an electric telescopic push rod, and the upper end of the electric telescopic push rod is fixedly connected with a placement cavity for installing a Beidou antenna, and the lower side wall of the base is provided with a symmetrical groove, and a rotating plate is rotatably connected between the side walls of the groove, and a limiting groove is provided on the side of the upper end of the rotating plate close to the base, and a limiting mechanism is provided in the middle portion of the upper end of the base for limiting and fixing the rotating plate, and the limiting mechanism includes a second circular plate, the lower portion of the second circular plate is rotatably connected to the base, and the upper end of the base is provided with a first ring groove for cooperating with the second circular plate, the lower end of the second circular plate is rotatably connected to the first ring groove, and the end of the second circular plate away from the base is fixedly connected to a gear ring, and the end of the gear ring away from the second circular plate is fixedly connected to the first circular plate, the inner cavity diameters of the first circular plate and the second circular plate are equal, and the inner cavity diameter of the second circular plate is smaller The locking lever is secured to a location where the first and second levers are engaged and disengaged, and the locking lever is secured to a location where the first and second levers are engaged and disengaged, respectively. The guide rod is located at one end of the guide groove cavity away from the mounting rod. After the second circular plate is rotated clockwise as the handle rotates clockwise, the guide rod will move relatively to the end of the guide groove cavity close to the mounting rod, thereby driving the L-shaped rod to move horizontally toward the direction of the mounting rod, so that the horizontal rod is separated from the limit slot, thereby releasing the limit on the rotating plate, and then allowing the rotating plate to rotate from a vertical state to a horizontal state. When the rotating plate is in the horizontal state, the second circular plate is rotated counterclockwise to reset it, which can drive the L-shaped rod horizontally away from the position of the mounting rod, so that the upper end surface of the horizontal rod is in contact with the lower end surface of the rotating plate, thereby supporting the rotating plate.

2. The support frame for Beidou antenna testing according to claim 1, characterized in that: The lower part of one end of the rotating plate away from the base is rotatably connected to the connecting rod, the middle part of the lower end of the connecting rod is rotatably connected to the wheel, the lower part of the inner cavity of the connecting rod is vertically slidably connected to the brake block, the middle part of the upper end of the brake block is fixedly connected to the fixing rod, the upper end of the fixing rod passes through the top of the connecting rod and extends into the inner cavity of the rotating plate, and the upper end of the fixing rod is fixedly connected to the driven block.

3. The support frame for Beidou antenna testing according to claim 2, characterized in that: The driven block is movably connected to the side of the rotating plate inner cavity away from the base, and the upper outer wall of the driven block is provided with an arc surface, and the side of the driven block close to the base is provided with a push plate, the upper end of the push plate is horizontally slidably connected to the top of the rotating plate inner cavity, and the lower end of the push plate is fixedly connected to the second rack, and a gear is provided below the second rack, and the gear is rotatably connected to the side wall of the rotating plate inner cavity, and a first rack is provided below the second rack, and the first rack is slidably connected to the bottom of the rotating plate inner cavity, and the second rack and the first rack are both meshed with the gear, and the push plate is provided with an inclined surface on the side close to the driven block.

4. The support frame for Beidou antenna testing according to claim 2, characterized in that: A second annular groove is provided in the middle of the lower end of the driven block, and a symmetrical conical block is provided below the second annular groove. The bottom of the symmetrical conical block is fixedly connected to the bottom of the inner cavity of the rotating plate. The lower end of the driven block is rotatably connected to a circular ring, and the lower end of the circular ring is vertically slidably connected to a symmetrical second balance rod, the lower end of the second balance rod is fixedly connected to the bottom of the inner cavity of the rotating plate, and the outer wall of the second balance rod is sleeved with a second spring.

5. The support frame for Beidou antenna testing according to claim 3, characterized in that: The cam is connected to the bottom of the inner cavity of the rotating plate, and the lower end of the movable block is horizontally slidably connected to the bottom of the inner cavity of the rotating plate. The end of the movable block away from the first rack is elastically connected to the side wall of the inner cavity of the rotating plate by a third spring. The middle part of the side of the movable block away from the first rack is fixedly connected to a rope, and the middle part of the lower end of the base is fixedly connected to the movable column, and the end of the rope away from the movable block passes through the middle part of the side of the lower end of the rotating plate close to the base, and is fixedly connected to the lower end side wall of the movable column, and the lower part of the inner cavity side wall of the groove is fixedly connected to an arc block.

6. The support frame for Beidou antenna testing according to claim 5, characterized in that: The movable column is vertically slidably connected to the lower part of the inner cavity of the mounting rod, the upper end of the movable column is fixedly connected to a support rod, the middle part of the inner cavity of the first circular plate is fixedly connected to a symmetrical driving rod, the end of the driving rod away from the outer wall of the movable column is slidably connected, the outer wall of the mounting rod is provided with an adapter groove for cooperating with the driving rod, the outer wall of the movable column is provided with a No. 1 groove for cooperating with the driving rod, and one end of the No. 1 groove is provided with a No. 2 groove.

7. The support frame for Beidou antenna testing according to claim 1, characterized in that: A balancing groove is provided on one side of the guide groove, and the balancing groove is slidably connected to the guide rod. The horizontal distances from both ends of the balancing groove to the center of the first circular plate are equal.

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