A rotating table dedicated to laser radar

Abstract

The utility model relates to laser radar technical field especially is a kind of rotating platform special for laser radar, including seat body, the upper end fixedly connected with boss of seat body, the inside of seat body is provided with driving motor, and the output end cooperation of connecting plate is butt joint with harmonic reducer, the bottom of seat body is provided with recess, and the inside of recess is provided with double buffering assembly, the utility model is provided with double buffering assembly in the recess of seat body bottom, by the elastic deformation of rubber and the elastic buffering double effect of spring, can efficiently absorb the vibration of outside transmission in vehicle-mounted or mobile scene, significantly reduce the transmission intensity of vibration to rotating platform body, avoid the slight amplitude of rotation shaft system to be shaken due to vibration, to guarantee the scanning accuracy of laser radar radian level above, improve the coincidence degree and spatial resolution of point cloud data, reduce target identification error and environmental modeling distortion problem.

Description

Technical Field

[0001] This utility model relates to the field of lidar technology, specifically a lidar-specific rotary table. Background Technology

[0002] As a core sensor in fields such as autonomous driving, intelligent surveying and mapping, and industrial inspection, the performance of LiDAR directly depends on the precise control and stable operation of the scanning angle. The rotary table, as a key support and driving component of LiDAR, must maintain high-precision rotational positioning capabilities in dynamic environments to ensure the accuracy and reliability of LiDAR point cloud data.

[0003] Currently, most rotating platforms for LiDAR on the market use traditional mechanical rotating structure designs. The bottom support structure of existing rotating platforms generally does not have shock absorption components. In vehicle or mobile device scenarios, external vibrations will be directly transmitted to the rotating platform body through the bottom support. Since the scanning accuracy of LiDAR usually requires milliradian level or even higher, such vibrations will significantly reduce the overlap and spatial resolution of its point cloud data, and in severe cases may lead to target recognition errors or environmental modeling distortion.

[0004] Therefore, a dedicated rotary table for lidar is needed to improve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a dedicated rotating stage for lidar to solve the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A rotary table for lidar includes a base, with a boss fixedly connected to the upper end of the base. A drive motor is installed inside the base, and a harmonic reducer is connected to the output end of a connecting plate. A groove is formed at the bottom of the base, and a double buffer assembly is installed inside the groove. A rotating frame is connected to the harmonic reducer. A limit structure is provided at the upper end of the base to maintain the rotational stability of the rotating frame. A mounting rod is connected to the rotating frame, and a drive component is mounted on the rotating frame. The output end of the drive component is connected to the mounting rod to drive the rotational adjustment of the mounting rod.

[0008] As a preferred embodiment of this utility model, the dual buffer assembly includes a rubber plate b and a rubber plate a. The rubber plate b is fixedly connected to the inner upper surface of the groove, and several springs are connected at equal intervals between the rubber plate b and the rubber plate a.

[0009] As a preferred embodiment of this utility model, the side of the seat is fixedly connected with several mounting ears, and the seat is fixedly installed through the mounting ears, which, together with the double buffer assembly, absorbs and buffers the vibration during transportation.

[0010] As a preferred embodiment of this utility model, the rotating frame includes a connecting plate that mates with the harmonic reducer. Connecting plates are fixedly connected to both sides of the connecting plate. Vertical plates are fixedly connected to the outer ends of the connecting plates on both sides, and a rotating ring is connected to the lower ends of the vertical plates on both sides.

[0011] As a preferred embodiment of this utility model, the limiting structure includes a plurality of limiting members arranged in a circular array.

[0012] As a preferred embodiment of this utility model, the limiting component is a limiting block, each of the limiting blocks is L-shaped, and the rotating ring limiting component is rotatably disposed between the limiting block and the base.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model uses a dual buffer component set in the groove at the bottom of the seat. Through the elastic deformation of the rubber and the elastic buffering of the spring, it can efficiently absorb the vibration transmitted from the outside in the vehicle or mobile scene, significantly reduce the intensity of vibration transmitted to the rotary table body, avoid the slight vibration of the rotating shaft system caused by vibration, thereby ensuring the scanning accuracy of the lidar at the milliradian level or above, improving the overlap and spatial resolution of point cloud data, and reducing target recognition error and environmental modeling distortion.

[0015] 2. This utility model, through the transmission structure of a drive motor and a harmonic reducer, can effectively reduce the backlash error of traditional gear transmission and improve the angle control accuracy of the rotary table. At the same time, the integrated design of the rotating frame, connecting plate, vertical plate and rotating ring, combined with the limiting structure at the upper end of the base, can limit the radial sway of the rotating ring, maintain the stability of the rotating frame under high-frequency start-stop or variable speed conditions, avoid scanning angle deviation caused by shaft sway, and ensure the synchronization and continuity of lidar scanning. Attached Figure Description

[0016] Figure 1 This is a first-view perspective perspective view of the present invention;

[0017] Figure 2 This is a second-view perspective perspective view of the present invention;

[0018] Figure 3 This is a third-view perspective view of the present invention;

[0019] Figure 4 This is a fourth-view perspective view of the present invention;

[0020] Figure 5 This is a fifth-view perspective view of the present invention;

[0021] Figure 6 This is a cross-sectional schematic diagram of the present invention.

[0022] In the diagram: 1. Base body; 2. Mounting ear; 3. Limiting block; 4. Protrusion; 5. Connecting plate; 6. Vertical plate; 7. Driving component; 8. Mounting rod; 9. Rubber plate a; 10. Rotary ring; 11. Spring; 12. Rubber plate b; 13. Groove; 14. Harmonic reducer; 15. Drive motor; 16. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below with reference to relevant embodiments. Several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0025] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Please see Figure 1-6 This utility model provides a technical solution:

[0028] For an example, please refer to... Figure 1 , 23, 4, 5, and 6, a special rotating platform for lidar, comprising a base 1, a boss 4 fixedly connected to the upper end of the base 1, a drive motor 16 disposed inside the base 1, and a harmonic reducer 15 mating with the output end of the connecting plate 6, a groove 14 formed at the bottom of the base 1, and a double buffer assembly disposed inside the groove 14; a rotating frame mating with the harmonic reducer 15, a limit structure disposed at the upper end of the base 1 to maintain the rotational stability of the rotating frame, a mounting rod 9 connected to the rotating frame, a drive component 8 mounted on the rotating frame, the output end of the drive component 8 mating with the mounting rod 9 to drive the rotational adjustment of the mounting rod 9.

[0029] The base 1 is the basic support component of the entire rotary table. It integrates the core power source - drive motor 16. The output end of drive motor 16 is directly connected to harmonic reducer 15. Through the precision transmission characteristics of harmonic reducer 15, the high-speed rotation of drive motor 16 is converted into low-speed, high-torque output, which effectively reduces the backlash error in traditional gear transmission and ensures the angle control accuracy of the rotary table.

[0030] A drive unit 8 is mounted on the vertical plate 7 of the rotating frame, and the output end of the drive unit 8 is connected to the mounting rod 9. The lidar is fixed by the mounting rod 9. When the drive unit 8 is activated, it can drive the mounting rod 9 to rotate and adjust around its own axis, thereby changing the vertical scanning angle of the lidar. Combined with the horizontal rotation of the rotating frame, the lidar can achieve two-dimensional scanning coverage.

[0031] Please refer to Figure 1 , 2 3, 4, 5 and 6, the double buffer assembly includes rubber plate b13 and rubber plate a10. Rubber plate b13 is fixedly connected to the inner upper surface of the groove 14, and several springs 12 are connected at equal intervals between rubber plate b13 and rubber plate a10. Several mounting ears 2 are fixedly connected to the side of the seat 1. The seat 1 is fixedly installed through the mounting ears 2, and works with the double buffer assembly to absorb and buffer the vibration during transportation.

[0032] To address the issue of external vibrations being transmitted to the rotary table body, a groove 14 is provided at the bottom of the base 1. A double buffer assembly, consisting of a rubber plate b13, a spring 12, and a rubber plate a10, is installed within the groove 14.

[0033] Rubber plate b13 is fixedly connected to the inner upper surface of groove 14, and rubber plate a10 is located at the bottom of groove 14. The two are connected by springs 12 that are evenly distributed.

[0034] When external vibrations are transmitted to the rotary table, the vibration energy is first partially absorbed by the elastic deformation of the rubber plate a10; the remaining vibration is further buffered by the compression / tension of the spring 12; and the vibration that is not completely absorbed is then transmitted to the base 1 body after secondary elastic buffering by the rubber plate b13. Through the dual action of rubber buffering and spring buffering, the impact of vibration on the rotary table is significantly reduced, and the slight vibration of the rotating shaft system is avoided.

[0035] Please refer to Figure 1 , 2 3, 4, 5 and 6, the rotating frame includes a connecting plate 5 that mates with the harmonic reducer 15, connecting plates 6 are fixedly connected to both sides of the connecting plate 5, vertical plates 7 are fixedly connected to one side of the connecting plates 6 on both sides, and the lower ends of the vertical plates 7 on both sides are connected to a rotating ring 11.

[0036] The limiting structure includes several limiting components arranged in a circular array. Each limiting component is a limiting block 3, and each limiting block 3 is L-shaped. The rotating ring 11 is rotatably positioned between the limiting block 3 and the base 1.

[0037] The output end of the harmonic reducer 15 is fitted with a docking rotating frame, which consists of a connecting disc 5, a connecting plate 6, a vertical plate 7, and a rotating ring 11.

[0038] The connecting plate 5 is directly fixed to the output shaft of the harmonic reducer 15. When the output of the harmonic reducer 15 rotates, the connecting plate 5 rotates synchronously, and drives the vertical plate 7 and the rotating ring 11 to rotate as a whole through the connecting plates 6 fixed on both sides.

[0039] To maintain the stability of the rotating frame, a limiting structure is provided at the upper end of the base 1, which consists of several limiting blocks 3 arranged in a circumferential array. Each limiting block 3 is L-shaped, with its horizontal section covering the upper surface of the rotating ring 11 and its vertical section close to the outer wall of the rotating ring 11. The rotating ring 11 is limited and rotated between the limiting block 3 and the base 1. This design can limit the radial sway and axial movement of the rotating ring 11, ensuring the smooth operation of the rotating frame under high-frequency start-stop or variable speed conditions.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary table for laser radar, comprising a base (1), a boss (4) fixedly connected to the upper end of the base (1), a drive motor (16) disposed inside the base (1), and a harmonic reducer (15) mating with the output end of the connecting plate (6), characterized in that: The bottom of the seat (1) is provided with a groove (14), and a double buffer assembly is provided inside the groove (14); The harmonic reducer (15) is fitted with a rotating frame. The upper end of the base (1) is provided with a limit structure to maintain the rotational stability of the rotating frame. The rotating frame is connected to a mounting rod (9). A driving component (8) is installed on the rotating frame. The output end of the driving component (8) is fitted with the mounting rod (9) to drive the rotation adjustment of the mounting rod (9).

2. The dedicated rotary table for lidar according to claim 1, characterized in that: The dual buffer assembly includes a rubber plate b (13) and a rubber plate a (10). The rubber plate b (13) is fixedly connected to the inner upper surface of the groove (14), and several springs (12) are connected at equal intervals between the rubber plate b (13) and the rubber plate a (10).

3. The dedicated rotary table for lidar according to claim 2, characterized in that: The side of the seat (1) is fixedly connected with several mounting ears (2). The seat (1) is fixedly installed through the mounting ears (2) and, together with the double buffer assembly, absorbs and buffers the vibration during transportation.

4. The dedicated rotary table for lidar according to claim 3, characterized in that: The rotating frame includes a connecting plate (5) that mates with the harmonic reducer (15). Connecting plates (6) are fixedly connected to both sides of the connecting plate (5). Vertical plates (7) are fixedly connected to the outer ends of the connecting plates (6) on both sides, and a rotating ring (11) is connected to the lower ends of the vertical plates (7) on both sides.

5. The dedicated rotary table for lidar according to claim 4, characterized in that: The limiting structure includes several limiting components arranged in a circular array.

6. The dedicated rotary table for lidar according to claim 5, characterized in that: The limiting component adopts a limiting block (3), each of the limiting blocks (3) is L-shaped, and the rotating ring (11) is limited to rotate between the limiting block (3) and the seat (1).

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