Vehicle-mounted radar antenna pitching lifting mechanism

Abstract

The utility model relates to a kind of vehicle-mounted radar antenna pitch lifting mechanism, including connecting rod structure, antenna frame and platform, electric cylinder;Platform installs connecting rod structure and electric cylinder, electric cylinder is hinged with connecting rod structure, and connecting rod structure is hinged with antenna frame;Connecting rod structure includes upper connecting rod and lower connecting rod, one end of upper connecting rod is hinged with the upper portion of antenna frame by pivot, and its other end is hinged with platform by pivot;One end of lower connecting rod is hinged with the bottom end of antenna frame by pivot, and its other end is hinged with platform by pivot;The rod end of electric cylinder is hinged with upper connecting rod by pivot, and the cylinder body bottom end of electric cylinder is hinged with double-ear B fixed in platform.The beneficial effects reached by the utility model are: beam obstruction, center of gravity deviation and the wobble caused by the structure gap of overall mechanism can be solved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted radar technology, and in particular to a vehicle-mounted radar antenna elevation and lifting mechanism. Background Technology

[0002] Vehicle-mounted radar systems have high requirements for mobility and environmental adaptability. They need to meet the vehicle's height and width restrictions during transport, while having sufficient lifting height, pitch range adjustment capability, high mechanical tracking accuracy, and reliable pipeline and wiring connection performance during operation. The antenna lifting mechanism in the system is to reduce the obstruction of the antenna beam by the surrounding environment. Currently, most systems use a fixed shaft mechanism with an electric cylinder as the drive unit. The pitch movement of the antenna is used to precisely adjust the beam direction according to mission requirements. In addition to using a fixed shaft mechanism, this can also be achieved using a gear transmission or belt drive pitch box mechanism.

[0003] However, for large vehicle-mounted radar antennas, when using a fixed pivot mechanism or an elevation box mechanism, the antenna beam is easily blocked by the front of the vehicle when the elevation angle is 90° (the antenna's normal is parallel to the horizontal plane), creating a detection blind zone and affecting the radar's all-space detection performance. Secondly, when using a fixed pivot mechanism, the antenna's center of gravity shifts significantly during elevation, resulting in insufficient stability during azimuth rotation and affecting the overall accuracy of the radar. In addition, at specific elevation angles, the fixed pivot mechanism may cause the electric cylinder's output force to change from thrust to pull. Due to the mechanical backlash and hinge gaps inherent in the electric cylinder, the antenna is prone to swaying due to instability near that angle, further reducing tracking and positioning accuracy.

[0004] Therefore, based on the shortcomings of the existing device, the inventors made further improvements to overcome the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a vehicle-mounted radar antenna pitch lifting mechanism that can solve problems such as beam obstruction, center of gravity shift, and swaying caused by structural gaps.

[0006] The purpose of this utility model is achieved through the following technical solution: a vehicle-mounted radar antenna pitch lifting mechanism, including a linkage structure, an antenna frame, a platform, and an electric cylinder; The platform is equipped with a linkage structure and an electric cylinder. The electric cylinder is hinged to the linkage structure, and the linkage structure is hinged to the antenna frame. The linkage structure includes an upper linkage and a lower linkage. One end of the upper linkage is hinged to the upper part of the antenna frame via a pivot, and the other end is hinged to the platform via a pivot. One end of the lower linkage is hinged to the bottom of the antenna frame via a pivot, and the other end is hinged to the platform via a pivot. The rod end of the electric cylinder is hinged to the upper connecting rod via a rotating shaft, and the bottom end of the cylinder body is hinged to the double lugs B fixed on the platform.

[0007] As a preferred technical solution of this application, it also includes a thin connecting rod; one end of the thin connecting rod is hinged to the lower connecting rod by a pin, and the other end is hinged to a damper by a pin.

[0008] As a preferred technical solution of this application, the damper includes a cylinder and a tie rod; the tie rod is coaxial with the cylinder and can move along the cylinder axial direction; the tie rod in the damper is hinged to a thin connecting rod; and the end of the cylinder is hinged to a double lug A fixed on a platform via a pin.

[0009] As a preferred technical solution of this application, the platform is provided with symmetrical mounting slots on the left and right sides respectively. An electric cylinder is arranged in the mounting slot. Two sets of pitch and lifting mechanisms are arranged on the platform in a left-right symmetrical structure and are hinged to the same antenna frame.

[0010] As a preferred technical solution of this application, the electric cylinder includes a motor and a cylinder body; the motor is connected to the cylinder body via a reducer, and the motor drives the cylinder body to push the hinged upper connecting rod to move, and the upper connecting rod drives the antenna frame and the lower connecting rod to start moving.

[0011] As a preferred technical solution of this application, the center of gravity of the antenna frame is always located near the rotation center of the platform during the pitching motion.

[0012] As a preferred technical solution of this application, the antenna frame is in a retracted state when the pitch angle is 0°, and is raised when the pitch angle is 90°. The antenna as a whole in the antenna frame is higher than the front of the vehicle to avoid the beam being blocked.

[0013] As a preferred technical solution of this application, when the antenna frame moves to the pitch range of 80° to 90°, the damper's pull rod is pulled out from the cylinder.

[0014] As a preferred technical solution of this application, the antenna frame is provided with two symmetrical grooves, and the grooves are provided with hinge holes. The grooves are used to accommodate and connect the connecting rod structure.

[0015] This utility model has the following advantages: (1) In this scheme, the antenna frame movement mechanism is achieved by setting two sets of symmetrical linkages on the platform and cooperating with electric cylinders. Both sets of electric cylinders are synchronously controlled by displacement sensors. The linkage structure in this scheme enables the antenna frame that is hinged to it to be lifted and pitched along a fixed trajectory. The radar antenna surface on it is higher than the front of the vehicle, avoiding the blind spot of vehicle radar detection caused by the front of the vehicle, and avoiding affecting the function of vehicle radar. (2) At the same time, the upper connecting rod, lower connecting rod, electric cylinder and each hinge point of the platform and antenna frame are accurately set in this scheme, so that the center of gravity of the antenna frame is always in the same center when it is pitching, thereby avoiding the antenna being unbalanced and unstable when rotating in azimuth. In addition, this scheme also designs a damper and a thin connecting rod to ensure that the electric cylinder maintains thrust output throughout the entire movement stroke, and the output direction does not change, avoiding structural shaking and improving overall stability. At the same time, the damper can provide a certain buffer to avoid rigid impact, thereby improving the stability of the mechanism. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the present invention viewed from a 90° angle while in operation. Figure 2 This is a first-view structural schematic diagram of the electric cylinder of this utility model; Figure 3 This is a first-view structural schematic diagram of the damper of this utility model; Figure 4 This is a structural schematic diagram of the present invention viewed from a side angle at an 80° elevation while it is in operation. Figure 5 This is a structural schematic diagram of the present invention in its stored state, viewed from a 0° tilt angle. Figure 6 This is a structural schematic diagram of the present invention in its working state with a 90° pitch angle from a first-person perspective; Figure 7 This is a structural schematic diagram of the present invention in a 90° pitch second-view state during operation; Figure 8 This is a first-view structural schematic diagram of the antenna frame of this utility model; Figure 9 This is a first-person view structural diagram of the platform of this utility model; In the diagram: 1-antenna frame, 2-shaft, 3-lower connecting rod, 4-pin, 5-thin connecting rod, 6-damper, 7-platform, 8-double lug A, 9-upper connecting rod, 10-electric cylinder, 11-double lug B, 12-motor, 13-displacement sensor, 14-reducer, 15-cylinder body, 16-cylinder barrel, 17-connecting rod. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0018] It should be noted that the orientation or positional relationship indicated by terms such as "left" and "right" is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this invention is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. Such terms are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0020] Therefore, based on the above issues, please refer to Figure 1 This utility model proposes a vehicle-mounted radar antenna pitch lifting mechanism to solve the problem.

[0021] See Figures 1-9 The present implementation scheme proposes a vehicle-mounted radar antenna pitch lifting mechanism, including a platform 7 for mounting the pitch lifting mechanism, an antenna frame 1, and a connecting rod structure. See Figure 1 and Figure 9 Platform 7 serves as the basic mounting base for this mechanism. A linkage structure and an electric cylinder 10, which acts as a power source, are installed on platform 7. The linkage structure is movably connected to the antenna frame 1. By driving the electric cylinder 10, the linkage structure is moved, thereby causing the antenna frame 1 to pitch and lift. The radar antenna in the antenna frame 1 then performs detection, avoiding blind spots. See Figure 1 and Figures 4-5 The linkage structure includes two rod structures: an upper linkage 9 and a lower linkage 3. The upper end of the upper linkage 9 is hinged to the upper part of the antenna frame 1 via a pivot 2, and the lower end of the upper linkage 9 is also hinged to the platform 7 via a pivot 2, so that the upper linkage 9 can rotate around the hinge point of the platform 7, thereby driving the antenna frame 1 to move. The upper end of the lower linkage 3 is hinged to the lower part of the antenna frame 1 via a pivot 2, and its lower end is hinged to the platform 7 via a pivot 2, so that when the upper linkage 9 rotates, the lower linkage 3 moves synchronously. See Figures 1-2 The electric cylinder 10 serves as a power mechanism, with its rod end hinged to the upper connecting rod 9 via a rotating shaft 2, while the bottom end of the cylinder body 15 of the electric cylinder 10 is movably hinged to the platform 7 via a double lug B11 fixedly mounted on the platform 7. The upper connecting rod 9 is driven by the electric cylinder 10 to rotate around the hinge point of its platform 7, thereby driving the movable antenna frame 1 to move. As a result, the lower connecting rod 3, which is hinged to the antenna frame 1, also rotates, driving the antenna frame 1 to be lifted for operation.

[0022] Currently, large vehicle-mounted radar antennas are often susceptible to beam obstruction by the front of the vehicle during installation, which can affect radar detection. Furthermore, the existing mechanisms used in vehicle-mounted radar antennas exhibit significant center-of-gravity shifts during elevation, resulting in insufficient stability during rotation and also impacting radar detection. Therefore, this solution designs a vehicle-mounted radar antenna elevation lifting mechanism. Through the cooperation of a linkage structure and an electric cylinder 10, the antenna frame 1 is elevated and lifted without being obstructed by the front of the vehicle. Moreover, this solution uses an upper connecting rod 9 and a lower connecting rod 3 to perform a fixed-point hinge to the antenna frame 1, ensuring that the center of gravity of the antenna frame 1 remains close to the azimuth rotation center during elevation and lifting, resulting in smoother movement.

[0023] In this embodiment, see Figures 1-4 For the electric cylinder 10, the electric cylinder 10 includes a motor 12, a cylinder body 15, a reducer 14, and a displacement sensor 13; the motor 12 is connected to the cylinder body 15 via the reducer 14, and the cylinder body 15 is driven by the motor 12 to push the hinged upper connecting rod 9 to move, and the upper connecting rod 9 drives the antenna frame 1 and the lower connecting rod 3 to start moving.

[0024] It should be noted that the motor 12 is connected to the reducer 14 as a power source by bolts (the output shaft of the motor 12 is connected to the reducer 14). The reducer 14 is simultaneously connected to the mounting flange on the cylinder body 15 by bolts. The output gear of the reducer 14 meshes with the gear inside the cylinder body 15. A displacement sensor 13 is fixedly installed on the side of the cylinder body 15, and its movable end is installed at the upper end of the cylinder body 15.

[0025] Furthermore, when the antenna frame 1 starts to work and pitches, the motor 12 is energized and rotates. At this time, the torque output by the motor 12 is proportionally amplified by the reducer 14, while the speed is reduced by the same proportion. The reducer 14 transmits the torque and speed to the cylinder 15 through gear transmission, so that the cylinder 15 converts the rotational motion into linear motion, which further pushes the upper connecting rod 9, which is hinged to it, to rotate clockwise around the hinge point of its platform 7, thereby driving the antenna frame 1, which is hinged to the upper connecting rod 9, to move. Thus, the lower connecting rod 3, which is hinged to the antenna frame 1, also moves synchronously according to the predetermined motion trajectory, and the antenna frame 1 achieves pitching motion.

[0026] In this embodiment, see Figure 3 and Figure 4It also includes a thin connecting rod 5; the thin connecting rod 5 is movably connected to the lower connecting rod 3, and the upper end of the thin connecting rod 5 is hinged to the body of the lower connecting rod 3 via a pin 4. The lower connecting rod 3 has an ear pin plate. After the pin 4 is inserted into the end of the thin connecting rod 5, the pin 4 and the ear pin plate are inserted into each other. The lower end of the thin connecting rod 5 is also hinged to the damper 6 via a pin 4. The damper 6 includes a cylinder 16 and a pull rod 17. One end of the cylinder 16 extends out of the pull rod 17, and the pull rod 17 is hinged to the thin connecting rod 5. The other end of the cylinder 16 is connected to the double lug A8 fixed on the platform 7 via a pin 4. The pull rod 17 is coaxial with the cylinder 16 and can move along the axial direction of the cylinder 16.

[0027] Further, see Figure 1 and Figures 6-9 For platform 7, symmetrical mounting grooves are provided on the left and right sides of platform 7 respectively. In each area, an electric cylinder 10, upper connecting rod 9, lower connecting rod 3, thin connecting rod 5 and damper 6 are independently arranged. That is, two sets of pitch lifting mechanisms are set on platform 7 in a strictly symmetrical structure and are hinged to the same antenna frame 1, thus forming a stable and reliable parallel support mechanism. At the same time, the electric cylinders 10 in these two mechanisms receive feedback data through displacement sensors 13, thereby realizing synchronous mechanical movement.

[0028] Furthermore, two corresponding grooves are provided at the lower end of the antenna frame 1. These grooves are provided with corresponding hinge holes to accommodate the arrangement of the upper connecting rod 9 and the lower connecting rod 3, so that the connecting rod structure can be fitted to the antenna frame 1. The grooves are used to accommodate and connect the connecting rod structure.

[0029] It should be noted that in this scheme, when the antenna frame 1 is at the 0° pitch position, both the electric cylinder 10 and the damper 6 are retracted, and the pitch lifting mechanism is compactly folded on the platform 7. At this time, the height of the mechanism is at its lowest, the antenna's center of gravity is low, and it can be transported smoothly. When the antenna frame 1 needs to be lifted, the symmetrical motors 12 on the platform 7 are activated simultaneously. The motors 12 drive the cylinder 15 to push the upper connecting rod 9 to rotate around its hinge point with the platform 7. Under the constraint of the multi-link mechanism formed by the upper connecting rod 9, the lower connecting rod 3, and the antenna frame 1, the antenna frame 1 moves along a predetermined composite trajectory, simultaneously achieving lifting and pitching. During this process, the electric cylinder 10 always provides thrust (without changing the direction of the force). When the antenna frame 1 moves to 80° with the platform 7, the thin connecting rod 5, which is hinged to the lower connecting rod 3, coincides with the axis of the damper 6. In the final stage of the movement of the antenna frame 1 (80°-90°), the pull rod 17 of the damper 6 is gradually pulled out. The damping force generated by it ensures that the electric cylinder always provides thrust (without changing the direction of the force), thereby avoiding swaying (eliminating impact) and ensuring that the antenna in the antenna frame 1 can accurately and smoothly reach an elevation of 90°. The pulling force generated by the damper 6 is proportional to the distance that the pull rod 17 is pulled out.

[0030] It should also be noted that during the full range of pitch motion from 0° to 90°, the center of gravity of the antenna frame 1 always moves slightly near the azimuth rotation center of the platform 7, resulting in a small center of gravity eccentricity, making the rotation of the radar antenna more stable and the overall structure under good stress. In addition, when the pitch angle of the antenna frame 1 is 90°, the entire antenna is lifted and moved to a specific height, which ensures that the antenna is higher than the front of the vehicle, thus completely avoiding the problem of the beam being blocked by the front of the vehicle.

[0031] In this mechanism, when the antenna frame 1 moves to the pitch range of 80° to 90°, the pull rod 17 of the damper 6 is gradually pulled out from the cylinder 16 and generates a damping force proportional to the extension distance, ensuring that the electric cylinder always provides thrust (without changing the direction of the output force), thereby avoiding swaying (eliminating impact).

[0032] Furthermore, the stacked groove provided on the antenna frame 1 and the mounting groove provided on the platform 7 for the electric cylinder 10 provide the necessary space for the device during movement. The hinge hole provided on the side wall of the groove can securely and accurately insert the rotating shaft 2 and connect it to the upper and lower connecting rods 3 by hinge.

[0033] Existing vehicle-mounted radar antennas, when tilted to 90°, have their beams blocked by the vehicle's front, creating a detection blind spot and reducing the radar's all-space detection capability. Furthermore, in traditional antenna mechanisms, the antenna's center of gravity shifts significantly, leading to inertial imbalance and large swaying during azimuth rotation, affecting tracking accuracy and structural stability. Additionally, in traditional mechanisms, the electric cylinder 10's output direction changes from thrust to pull when it reaches a certain angle. This change in output direction, due to the electric cylinder 10's mechanical backlash and hinge gaps, causes unstable, minute swaying of the antenna at this critical position. Therefore, this solution uses the cooperation of the upper connecting rod 9 and the lower connecting rod 3 to lift the antenna as a whole above the front of the vehicle when it reaches 90°, eliminating the blind spot caused by the vehicle body itself. At the same time, due to the arrangement of the hinge points in this solution, the center of gravity of the antenna is near the rotation center of the platform 7, avoiding the problem of structural instability. In addition, this solution also includes a damper 6 that cooperates with the thin connecting rod 5 (as an auxiliary constraint mechanism). The thin connecting rod 5 is hinged to the lower connecting rod 3 to ensure that the thrust output is always maintained during the stroke of the main drive source electric cylinder 10, and the direction of the force remains unchanged, so that the antenna movement in this mechanism is smooth and the positioning is accurate.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vehicle-mounted radar antenna pitch lifting mechanism, characterized in that: Includes a linkage structure, an antenna frame (1), a platform (7), and an electric cylinder (10); The platform (7) is equipped with a connecting rod structure and an electric cylinder (10). The electric cylinder (10) is hinged to the connecting rod structure, and the connecting rod structure is hinged to the antenna frame (1). The connecting rod structure includes an upper connecting rod (9) and a lower connecting rod (3). One end of the upper connecting rod (9) is hinged to the upper part of the antenna frame (1) through a rotating shaft (2), and the other end is hinged to the platform (7) through a rotating shaft (2). One end of the lower connecting rod (3) is hinged to the bottom end of the antenna frame (1) through a rotating shaft (2), and the other end is hinged to the platform (7) through a rotating shaft (2). The rod end of the electric cylinder (10) is hinged to the upper connecting rod (9) via a rotating shaft (2), and the bottom end of the cylinder body (15) of the electric cylinder (10) is hinged to the double lugs B (11) fixed on the platform (7).

2. The vehicle-mounted radar antenna pitch lifting mechanism according to claim 1, characterized in that: It also includes a thin connecting rod (5); one end of the thin connecting rod (5) is hinged to the lower connecting rod (3) by a pin (4), and the other end is hinged to a damper (6) by a pin (4).

3. The vehicle-mounted radar antenna pitch lifting mechanism according to claim 2, characterized in that: The damper (6) includes a cylinder (16) and a tie rod (17); the tie rod (17) is coaxial with the cylinder (16) and can move along the cylinder (16) axially. The tie rod (17) in the damper (6) is hinged to the thin connecting rod (5), and the end of its cylinder (16) is hinged to the double lug A (8) fixed on the platform (7) via a pin (4).

4. The vehicle-mounted radar antenna pitch lifting mechanism according to claim 1, characterized in that: The platform (7) has symmetrical mounting slots on its left and right sides respectively. An electric cylinder (10) is arranged in the mounting slot. Two sets of pitch lifting mechanisms are arranged on the platform (7) in a left-right symmetrical structure and are hinged to the same antenna frame (1).

5. The vehicle-mounted radar antenna pitch lifting mechanism according to claim 4, characterized in that: The electric cylinder (10) includes a motor (12) and a cylinder body (15); the motor (12) is connected to the cylinder body (15) via a reducer (14), and the cylinder body (15) is driven by the motor (12) to push the hinged upper link (9) to move, and the upper link (9) drives the antenna frame (1) and the lower link (3) to start moving.

6. The vehicle-mounted radar antenna pitch lifting mechanism according to claim 5, characterized in that: During the pitching motion, the center of gravity of the antenna frame (1) is always located near the rotation center of the platform (7).

7. The vehicle-mounted radar antenna pitch lifting mechanism according to claim 6, characterized in that: The antenna frame (1) is in a retracted state when the pitch angle is 0°, and is raised when the pitch angle is 90°. The antenna in the antenna frame (1) is higher than the front of the vehicle to avoid the beam being blocked.

8. The vehicle-mounted radar antenna pitch lifting mechanism according to claim 7, characterized in that: When the antenna frame (1) moves to the pitch range of 80° to 90°, the pull rod (17) of the damper (6) is pulled out from the cylinder (16).

9. The vehicle-mounted radar antenna pitch lifting mechanism according to claim 8, characterized in that: The antenna frame (1) is provided with two symmetrical grooves, and the grooves are provided with hinge holes. The grooves are used to accommodate and connect the connecting rod structure.

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