Antenna pitching transmission device based on double worm gear reducer

Abstract

The utility model provides an antenna pitching transmission device based on a double-worm gear reducer, which comprises an antenna reflector, a high-frequency box, a left support arm, a right support arm, an azimuth turntable and a worm gear reduction transmission assembly arranged on the azimuth turntable, the worm gear and worm speed reduction transmission assembly comprises two symmetrically-arranged double-worm type worm gear and worm speed reducers, the two sides of the high-frequency box are fixedly connected with the ends of worm gear outer rings of the two double-worm type worm gear and worm speed reducers respectively, and the high-frequency box is driven by the double-worm type worm gear and worm speed reducers to rotate around a pitch axis in a pitching mode. The worm and gear speed reduction transmission assembly is provided with four worm input ends, and the speed reduction and reversing functions are achieved through the four reversing planetary speed reducers. The four reversing planetary reducers are connected through the coupler, the input synchronism of the worm input end is ensured, when the device is used for driving the antenna to do pitching motion, pitching balance weights do not need to be additionally added, and the device is suitable for driving the antenna with a great unbalanced load to do pitching motion.

Description

Technical Field

[0001] This utility model belongs to the field of antenna structure technology, specifically relating to an antenna pitch transmission device based on a dual worm gear reducer. Background Technology

[0002] Because gear transmission offers advantages such as smooth transmission and high efficiency, conventional antenna elevation drive systems, both domestically and internationally, currently employ a transmission mechanism consisting of a planetary reducer and a large final-stage gear. However, these conventional antenna elevation drive systems lack a self-locking function. Without added counterweight, the antenna elevation section will become unbalanced, and the antenna will rapidly rotate along the heavier side the moment the motor releases the brake, potentially causing a safety hazard. To ensure the elevation drive system can properly drive the antenna's elevation rotation, a counterweight equal to or even several times the antenna's weight is typically designed to maintain elevation balance. However, this approach undoubtedly increases the overall weight of the antenna system, making it unsuitable for the lightweight design requirements of some vehicle-mounted and ship-mounted antennas.

[0003] Therefore, there is an urgent need to design an antenna pitch transmission mechanism that does not require additional pitch counterweights and has a compact structure. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing antenna elevation transmission devices that require additional elevation counterweights when using gear structures, which increases the weight of the antenna system and fails to meet the requirements for miniaturization. Instead, this invention provides an antenna elevation transmission device based on a dual worm gear reducer.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] An antenna pitch transmission device based on a dual worm gear reducer includes an antenna reflector and a high-frequency box, wherein the antenna reflector is fixedly installed on the top of the high-frequency box; it also includes an azimuth turntable, a first arm, a second arm, and a worm gear reducer transmission assembly located between the first arm and the second arm;

[0007] The first arm and the second arm are vertically mounted on the top surface of the azimuth turntable and are respectively fixed to both ends of the worm gear reducer assembly; and the bottom of the worm gear reducer assembly does not contact the azimuth turntable.

[0008] The worm gear reducer assembly includes a first double worm type worm gear reducer, a second double worm type worm gear reducer, a first AC servo motor, a second AC servo motor, a third AC servo motor, a fourth AC servo motor, a first reversing planetary reducer, a second reversing planetary reducer, a third reversing planetary reducer, a fourth reversing planetary reducer, a first coupling, and a second coupling.

[0009] The first dual worm gear reducer and the second dual worm gear reducer are arranged in parallel.

[0010] The output shafts of the first AC servo motor, the second AC servo motor, the third AC servo motor, and the fourth AC servo motor are respectively connected to the input ends of the first reversing planetary reducer, the second reversing planetary reducer, the third reversing planetary reducer, and the fourth reversing planetary reducer.

[0011] The output shafts of the first reversing planetary reducer and the second reversing planetary reducer are respectively connected to the two worm input ends of the first double worm gear reducer, so that the output end of the first double worm gear reducer rotates in a set direction; and the first coupling output end of the first reversing planetary reducer is connected to the first coupling output end of the second reversing planetary reducer through a first coupling.

[0012] The output shafts of the third and fourth reversing planetary reducers are respectively connected to the two worm input ends of the second double worm gear reducer, such that the rotation direction of the output end of the second double worm gear reducer is the same as the rotation direction of the output end of the first double worm gear reducer; the first coupling output end of the third reversing planetary reducer is connected to the first coupling output end of the fourth reversing planetary reducer through another first coupling, and the second coupling output end of the second reversing planetary reducer is connected to the second coupling output end of the fourth reversing planetary reducer through a second coupling;

[0013] The first reversing planetary reducer, the second reversing planetary reducer, the third reversing planetary reducer, and the fourth reversing planetary reducer have the same speed ratio; all AC servo motors have the same rotation speed, and the two AC servo motors set on the same double worm gear reducer have the same rotation direction, while the AC servo motors set on different double worm gear reducers have different rotation directions.

[0014] The symmetrical side walls of the high-frequency box are fixedly connected to the outer rings of the worm wheels of the two dual worm gear reducers, so that the high-frequency box can pitch under the drive of the dual worm gear reducers.

[0015] Furthermore, the input end of the reversing planetary reducer is connected to the output shaft of the AC servo motor by a key; the output shaft of the reversing planetary reducer is connected to the worm input end of the dual worm gear reducer by a key.

[0016] Furthermore, a single dual-worm gear reducer includes a worm gear assembly and two worms, the two worms being arranged in parallel, the worm gear assembly being located between the two worms, and the central axis of the worm gear assembly being perpendicular to the plane containing the two worms;

[0017] The worm gear assembly comprises, from the inside out, a support housing, a bearing inner ring, and a worm gear outer ring that are coaxially stacked together, and the support housing is radially fixed to the bearing inner ring;

[0018] The outer wall of the bearing inner ring and the inner wall of the worm gear outer ring have mutually cooperating annular tracks, and the annular tracks contain a number of balls.

[0019] Furthermore, the outer ring end face of the worm gear of the dual worm gear reducer has several positioning stops for positioning and mounting the high-frequency box and the outer ring end face of the worm gear.

[0020] Furthermore, the first arm and the second arm have coaxially opened annular portions on their opposite sides;

[0021] The annular portions of the first and second arms respectively mate with the inner holes of the support housings on the two dual worm gear reducers to support the dual worm gear reducers.

[0022] Furthermore, the first arm and the second arm have the same structure, including a rectangular piece with an arc-shaped top and a connector fixed to the bottom of the rectangular piece; the side wall of the connector is fitted and fixedly connected to the side wall of the azimuth turntable.

[0023] Furthermore, the rectangular component has several reinforcing ribs at the junction with the connecting component.

[0024] Furthermore, the first coupling and the second coupling have the same composition, including a connecting shaft and plum blossom-shaped couplings installed at both ends of the connecting shaft.

[0025] The advantages of this utility model are:

[0026] 1. This utility model relates to an antenna elevation transmission device based on a dual worm gear reducer, comprising an antenna reflector, a high-frequency box, a left support arm, a right support arm, an azimuth turntable, and a worm gear reducer assembly mounted on the azimuth turntable. The worm gear reducer assembly includes two symmetrically arranged dual worm gear reducers. The high-frequency box is fixedly connected to the outer ring ends of the worm wheels of these two dual worm gear reducers on both sides, and rotates around the elevation axis under the drive of the dual worm gear reducers. This utility model's worm gear reducer assembly has four worm input ends, and achieves deceleration and reversing functions through four reversing planetary reducers. The four reversing planetary reducers are connected by couplings, ensuring the synchronization of the worm input ends. When using this utility model to drive antenna elevation movement, no additional elevation counterweight is required, making it suitable for driving antenna elevation movement with extremely large unbalanced loads.

[0027] 2. In this utility model, the small helix angle of the worm in the dual worm gear reducer allows for significant friction between the worm wheel and the worm. This friction prevents the worm wheel from rotating in the opposite direction, thus achieving a self-locking function. Specifically, when the AC servo motor releases its brake, the dual worm gear reducer will not rotate due to its self-locking function. Only when the AC servo motor starts rotating will the dual worm gear reducer rotate, thereby driving the high-frequency box and antenna reflector to perform pitch motion. Based on the self-locking effect of the dual worm gear reducer, the safety of the pitch motion of the antenna system under unbalanced loads is ensured.

[0028] 3. The device of this utility model has a compact structure. It can drive the pitch movement of the antenna system with four low-power AC servo motors, which compresses the structural space of the entire antenna system and effectively reduces the weight of the antenna system. It provides important guidance for the design of antennas with strict requirements on size and weight, such as those for vehicle-mounted and ship-mounted devices.

[0029] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0031] Figure 1 This is a three-dimensional schematic diagram of the antenna pitch transmission device based on the dual worm gear reducer of this utility model;

[0032] Figure 2 This is the main view of the antenna pitch transmission device based on the dual worm gear reducer of this utility model;

[0033] Figure 3 This is a left view of the antenna pitch transmission device based on a dual worm gear reducer according to this utility model;

[0034] Figure 4 This is a schematic diagram showing the layout and connection of the double worm gear reducer, the reversing planetary reducer, and the AC servo motor in this utility model.

[0035] Figure 5 This is a schematic diagram of the structure of the left and right support arms and the orientation turntable in this utility model;

[0036] Figure 6 This is a schematic diagram of the rotation direction of the double worm gear reducer and the AC servo motor in this utility model;

[0037] Figure 7 This is a schematic diagram of the antenna reflector in this utility model with an elevation of 30°.

[0038] In the diagram: 1-Antenna reflector, 2-High frequency box, 3-Left support arm, 4-Right support arm, 5-Azimuth turntable, 6-Pitch axis, 7-Dual worm gear reducer, 8-AC servo motor, 801-First AC servo motor, 802-Second AC servo motor, 803-Third AC servo motor, 804-Fourth AC servo motor, 9-First reversing planetary reducer, 10-Second reversing planetary reducer, 11-Third reversing planetary reducer, 12-Fourth reversing planetary reducer, 13-First coupling, 14-Second coupling. Detailed Implementation

[0039] The embodiments of the present invention are described in detail below. These embodiments are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0040] Reference Figure 1-4 This embodiment provides an antenna elevation transmission device based on a dual worm gear reducer, including an antenna reflector 1, a high-frequency box 2, a left support arm 3, a right support arm 4, an azimuth turntable 5, and a worm gear reducer transmission assembly. The antenna reflector 1 is fixedly mounted on the top of the high-frequency box 2.

[0041] The worm gear reducer assembly includes two double worm gear reducers 7, four AC servo motors 8, a first reversing planetary reducer 9, a second reversing planetary reducer 10, a third reversing planetary reducer 11, a fourth reversing planetary reducer 12, a first coupling 13, and a second coupling 14. The four AC servo motors are designated as first AC servo motor 801, second AC servo motor 802, third AC servo motor 803, and fourth AC servo motor 804.

[0042] The two dual worm gear reducers 7 include a first dual worm gear reducer and a second dual worm gear reducer. The first dual worm gear reducer and the second dual worm gear reducer are arranged in parallel. The output shafts of the first AC servo motor 801, the second AC servo motor 802, the third AC servo motor 803, and the fourth AC servo motor 804 are respectively connected to the input ends of the first reversing planetary reducer 9, the second reversing planetary reducer 10, the third reversing planetary reducer 11, and the fourth reversing planetary reducer 12 by parallel keys, which can effectively prevent slippage of the AC servo motor output shafts. The output shafts of the first reversing planetary reducer 9 and the second reversing planetary reducer 10 are respectively connected to the two worm input ends of the first dual worm gear reducer by parallel keys, so that the output ends of the dual worm gear reducer rotate in a set direction. Furthermore, the first coupling output ends of the first reversing planetary reducer 9 and the second reversing planetary reducer 10 are connected by a first coupling 13. The output shafts of the third reversing planetary reducer 11 and the fourth reversing planetary reducer 12 are respectively connected to the two worm input ends of the second double worm gear reducer by flat keys, so that the rotation direction of the output end of the second double worm gear reducer is the same as the rotation direction of the output end of the first double worm gear reducer; the first coupling output ends of the third reversing planetary reducer 11 and the fourth reversing planetary reducer 12 are connected by another first coupling 13; and the second coupling output end of the second reversing planetary reducer 10 is connected to the second coupling output end of the fourth reversing planetary reducer 12 by a second coupling 14, ensuring mechanical synchronization of the worm input ends, so that the outputs of the two double worm gear reducers are synchronized.

[0043] The two symmetrical side walls of the high-frequency box 2 are fixedly connected to the outer rings of the worm wheels of two double worm gear reducers, so that the high-frequency box 2 can pitch under the drive of the double worm gear reducers.

[0044] Because the helix angle of the worm in the dual worm gear reducer is small, a large frictional force is generated between the worm wheel and the worm. This frictional force prevents the worm wheel from rotating in the opposite direction, thus achieving a self-locking function. Based on the self-locking effect of the dual worm gear reducer, when the AC servo motor releases its brake, the dual worm gear reducer will not rotate due to its self-locking function. Only when the AC servo motor starts rotating will the dual worm gear reducer rotate, thereby driving the high-frequency box 2 and the antenna reflector 1 to perform pitch motion. The self-locking effect of the dual worm gear reducer ensures the safety of the antenna system's pitch motion under unbalanced loads.

[0045] Reference Figure 6To ensure the antenna elevation transmission device of this invention can properly drive the antenna elevation movement and avoid jamming caused by misalignment of the worm input end of the dual worm gear reducer, the four AC servo motors 8 in this invention operate at the same speed. The first AC servo motor 801 and the second AC servo motor 802, both mounted on the same dual worm gear reducer, rotate in the same direction. The third AC servo motor 803 and the fourth AC servo motor 804, also mounted on the same dual worm gear reducer, rotate in the same direction. However, the AC servo motors mounted on different dual worm gear reducers rotate in different directions. The first reversing planetary reducer 9, the second reversing planetary reducer 10, the third reversing planetary reducer 11, and the fourth reversing planetary reducer 12 have the same speed ratio.

[0046] Specifically, a single dual-worm gear reducer 7 includes a worm gear assembly and two worms arranged in parallel. The worm gear assembly is located between the two worms, and its central axis is perpendicular to the length of the worms. The worm gear assembly, from the inside out, includes a support housing, a bearing inner ring, and a worm gear outer ring, all coaxially stacked. The support housing is radially fixed to the bearing inner ring. The outer wall of the bearing inner ring and the inner wall of the worm gear outer ring have mating tracks containing several balls to withstand loads in various directions. The worm gear outer ring and the tracks on its inner wall are integrally machined. The support housing and the bearing inner ring are radially fixed by screws and pins. The symmetrical side walls of the high-frequency box 2 are fixedly connected to the end faces of the worm gear outer rings of the two dual-worm gear reducers by several high-strength bolts. The end faces of the worm gear outer rings have positioning stops for easy positioning and installation of the high-frequency box. The dual worm gear reducer of this utility model integrates the worm gear and bearing into one design, which can realize the pitching motion of the high-frequency box and also act as a bearing to support the high-frequency box 2.

[0047] The first coupling 13 and the second coupling 14 have the same composition, including a connecting shaft and plum blossom-shaped couplings installed at both ends of the connecting shaft. The only difference between the connecting shaft of the first coupling 13 and the connecting shaft of the second coupling 14 is their length. The plum blossom-shaped coupling has a simple structure, requires no lubrication, can operate continuously for a long time, and has a large axial, radial, and angular compensation capacity.

[0048] Reference Figure 5 The left support arm 4 and the right support arm 5 have the same structure, including a rectangular component with an arc-shaped top and a connector fixed to the bottom of the rectangular component. The side wall of the connector is fitted and fixed to the side wall of the azimuth turntable 5. Several reinforcing ribs are provided at the joint between the rectangular component and the connector to improve the reliability of the connection between the rectangular component and the connector.

[0049] During operation, four AC servo motors are started simultaneously. The first AC servo motor 801 and the second AC servo motor 802 rotate in the same direction. After being reversed by the first reversing planetary reducer 9 and the second reversing planetary reducer 10 connected to them, the two worms of the first double worm gear reducer rotate simultaneously in the same direction. The worm gear meshes and drives the worm wheel of the first double worm gear reducer to rotate counterclockwise (in this example, counterclockwise refers to the direction facing). Figure 6 (as shown in the direction); simultaneously, the third AC servo motor 803 and the fourth AC servo motor 804 rotate in the same direction (opposite to the rotation direction of the first AC servo motor 801 and the second AC servo motor 802), and after being reversed by the third reversing planetary reducer 11 and the fourth reversing planetary reducer 12 connected to them, the two worms of the second double worm gear reducer rotate simultaneously in the same direction (the same rotation direction of the worms of the first double worm gear reducer), and the worm gear meshes and drives the worm wheel of the second double worm gear reducer to rotate counterclockwise (the counterclockwise direction mentioned in this example is facing) Figure 6 (as shown in the direction); thereby driving the high-frequency box 2, which is fixed to the output ends of the first and second double worm gear reducers, to perform pitching motion with the central axis of the worm gear assembly as the pitch axis 6. Figure 7 The image shows a schematic diagram of the high-frequency box and antenna reflector in a 30° pitch state.

[0050] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present utility model, and these modifications or substitutions should all be covered within the protection scope of the present utility model.

Claims

1. An antenna pitch transmission device based on a dual worm gear reducer, comprising an antenna reflector and a high-frequency box, wherein the antenna reflector is fixedly mounted on the top of the high-frequency box; characterized in that, It also includes an orientation turntable, a first arm, a second arm, and a worm gear reduction transmission assembly located between the first arm and the second arm; The first arm and the second arm are vertically mounted on the top surface of the azimuth turntable and are respectively fixed to both ends of the worm gear reducer assembly; and the bottom of the worm gear reducer assembly does not contact the azimuth turntable. The worm gear reducer assembly includes a first double worm type worm gear reducer, a second double worm type worm gear reducer, a first AC servo motor, a second AC servo motor, a third AC servo motor, a fourth AC servo motor, a first reversing planetary reducer, a second reversing planetary reducer, a third reversing planetary reducer, a fourth reversing planetary reducer, a first coupling, and a second coupling. The first dual worm gear reducer and the second dual worm gear reducer are arranged in parallel. The output shafts of the first AC servo motor, the second AC servo motor, the third AC servo motor, and the fourth AC servo motor are respectively connected to the input ends of the first reversing planetary reducer, the second reversing planetary reducer, the third reversing planetary reducer, and the fourth reversing planetary reducer. The output shafts of the first reversing planetary reducer and the second reversing planetary reducer are respectively connected to the two worm input ends of the first double worm gear reducer, so that the output end of the first double worm gear reducer rotates in a set direction; and the first coupling output end of the first reversing planetary reducer is connected to the first coupling output end of the second reversing planetary reducer through a first coupling. The output shafts of the third and fourth reversing planetary reducers are respectively connected to the two worm input ends of the second double worm gear reducer, such that the rotation direction of the output end of the second double worm gear reducer is the same as the rotation direction of the output end of the first double worm gear reducer; the first coupling output end of the third reversing planetary reducer is connected to the first coupling output end of the fourth reversing planetary reducer through another first coupling, and the second coupling output end of the second reversing planetary reducer is connected to the second coupling output end of the fourth reversing planetary reducer through a second coupling; The first reversing planetary reducer, the second reversing planetary reducer, the third reversing planetary reducer, and the fourth reversing planetary reducer have the same speed ratio; all AC servo motors have the same rotation speed, and the two AC servo motors set on the same double worm gear reducer have the same rotation direction, while the AC servo motors set on different double worm gear reducers have different rotation directions. The symmetrical side walls of the high-frequency box are fixedly connected to the outer rings of the worm wheels of the two dual worm gear reducers, so that the high-frequency box can pitch under the drive of the dual worm gear reducers.

2. The antenna pitch transmission device based on a dual worm gear reducer according to claim 1, characterized in that, The input end of the reversing planetary reducer is connected to the output shaft of the AC servo motor by a flat key; the output shaft of the reversing planetary reducer is connected to the worm input end of the dual worm gear reducer by a flat key.

3. The antenna pitch transmission device based on a dual worm gear reducer according to claim 2, characterized in that, A single dual-worm gear reducer includes a worm gear assembly and two worms, the two worms being arranged in parallel, the worm gear assembly being located between the two worms, and the central axis of the worm gear assembly being perpendicular to the plane containing the two worms; The worm gear assembly comprises, from the inside out, a support housing, a bearing inner ring, and a worm gear outer ring that are coaxially stacked together, and the support housing is radially fixed to the bearing inner ring; The outer wall of the bearing inner ring and the inner wall of the worm gear outer ring have mutually cooperating annular tracks, and the annular tracks contain a number of balls.

4. The antenna pitch transmission device based on a dual worm gear reducer according to claim 3, characterized in that, The worm gear reducer has several positioning stops on the outer ring end face of the worm gear, which are used to achieve positioning and installation of the high-frequency box and the outer ring end face of the worm gear.

5. The antenna pitch transmission device based on a dual worm gear reducer according to claim 3, characterized in that, The first arm and the second arm have coaxially opened annular portions on their opposite sides; The annular portions of the first and second arms respectively mate with the inner holes of the support housings on the two dual worm gear reducers to support the dual worm gear reducers.

6. The antenna pitch transmission device based on a dual worm gear reducer according to claim 5, characterized in that, The first arm and the second arm have the same structure, including a rectangular piece with an arc-shaped top and a connector fixed to the bottom of the rectangular piece; the side wall of the connector is fitted and fixedly connected to the side wall of the azimuth turntable.

7. The antenna pitch transmission device based on a dual worm gear reducer according to claim 6, characterized in that, The rectangular component has several reinforcing ribs at the junction with the connecting component.

8. The antenna pitch transmission device based on a dual worm gear reducer according to claim 1, characterized in that, The first coupling has the same composition as the second coupling, including a connecting shaft and plum blossom-shaped couplings installed at both ends of the connecting shaft.

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