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DE-112024003034-T5 - Rotating support device for lidar and lidar

DE112024003034T5DE 112024003034 T5DE112024003034 T5DE 112024003034T5DE-112024003034-T5

Abstract

The present disclosure relates to a rotary support device for a LiDAR and the LiDAR itself. The rotary support device comprises a housing, a central spindle, a bearing support element, and a drive module. The housing is provided with a receiving cavity. The central spindle is arranged in the receiving cavity and is fixed relative to the housing. The bearing support element is coupled to the central spindle by a bearing. The drive module is configured to drive the bearing support element to rotate. The drive module comprises a stator and a rotor. The rotor includes an electromagnetic component, the electromagnetic component being attached to an outer wall of the bearing support element. The stator includes a magnetic component, the magnetic component being arranged on an outer surface of the electromagnetic component and fixed relative to the housing. The rotary support device has a simple and compact design, thereby reducing the size of the LiDAR and the number of internal components of the LiDAR, thus saving costs without compromising the performance of the LiDAR. This, in turn, facilitates the assembly and mass production of the LiDAR.

Inventors

  • Shanhui Feng
  • Jie Chen
  • Hui Nie
  • Jinming TIAN
  • Jinsong Chen
  • Shaoqing Xiang

Assignees

  • HESAI TECHNOLOGY CO., LTD.

Dates

Publication Date
20260513
Application Date
20240719
Priority Date
20230720

Claims (20)

  1. Rotary support device (200) for a LiDAR, comprising: a housing (1) provided with a receiving cavity; a central spindle (2) arranged in the receiving cavity and fixed relative to the housing (1); a bearing support element (3) arranged in the receiving cavity and coupled to the central spindle by a bearing (5) so that the bearing support element (3) is able to rotate relative to the central spindle (2); and a drive module (4) arranged in the receiving cavity and configured to drive the bearing support element (3) to rotation, the drive module (4) comprising a stator and a rotor, the rotor comprising an electromagnetic component (41) wherein the electromagnetic component (41) is attached to an outer wall of the bearing support element (3), and the stator comprising a magnetic component (42) wherein the magnetic component (42) is arranged on an outer surface of the electromagnetic component (41) and is attached relative to the housing (1).
  2. Rotary support device (200) according to Claim 1 , wherein the electromagnetic component (41) is arranged around the bearing support element (3) and the magnetic component (42) is arranged around the electromagnetic component (41) and is axially opposite the electromagnetic component (41).
  3. Rotary support device (200) according to Claim 1 or 2 , further comprising: a stator mounting element (43) which is attached relative to the housing (1), wherein the magnetic component (42) is attached to the stator mounting element (43).
  4. Rotary support device (200) according to Claim 3 , wherein the magnetic component (42) has a ring-shaped structure and the stator mounting element (43) is arranged around a circumferential surface of the magnetic component (42).
  5. Rotary support device (200) according to one of the Claims 1 until 4 , further comprising a wireless power supply module (6), wherein the wireless power supply module (6) is configured to supply power to a component rotating with the bearing support element (3) in the LiDAR.
  6. Rotary support device (200) according to Claim 5 , wherein the wireless power supply module (6) comprises: a transmitting coil (61) which is fixed relative to the housing (1); and a receiving coil (62) which is arranged axially opposite the transmitting coil (61) and is configured to rotate with the bearing support element (3).
  7. Rotary support device (200) according to Claim 6 , further comprising a lower circuit board (11), wherein the lower circuit board (11) is fixed relative to the housing (1) and is arranged around the central spindle (2) or the bearing (5) or the bearing support element (3), and wherein the transmitting coil (61) is arranged on the lower circuit board (11) to supply the transmitting coil (61) with energy via the lower circuit board (11).
  8. Rotary support device (200) according to Claim 7 , further comprising: a transmitting coil mounting element (63) arranged around a circumferential surface of the stator mounting element (43), wherein the transmitting coil mounting element (63) is configured to secure the transmitting coil (61) and is arranged between the stator mounting element (43) and the transmitting coil (61).
  9. Rotary support device (200) according to Claim 8 , wherein the magnetic component (42) and the transmitting coil mounting element (63) are arranged on the stator mounting element (43) and the stator mounting element (43) is firmly connected to the housing (1).
  10. Rotary support device (200) according to Claim 8 or 9 , wherein the transmitting coil mounting element (63) is made of an insulating material.
  11. Rotary support device (200) according to one of the Claims 1 until 10 , further comprising: a rotating support element (7) which is fixed relative to the bearing support element (3), wherein a detection device (100) of the LiDAR is mounted on the rotating support element (7).
  12. Rotary support device (200) according to Claim 11 , wherein the housing (1) comprises a base and a side wall arranged around the base, wherein the rotary support device (200) further comprises a position detector module (8) configured to detect rotational position information from the detection device (100), and wherein the position detector module (8) comprises: a code disk (81) arranged around an inner surface of the side wall and provided with a code track; and a code reader (82) attached relative to the rotary support element (7) and radially to the code disk (81) is arranged opposite each other, with the code reader (82) rotating with the rotating carrier element (7) to detect the code track on the code disk (81).
  13. Rotary support device (200) according to Claim 12 , wherein one extension direction of the code track runs parallel to the central spindle (2).
  14. Rotary support device (200) according to Claim 12 or 13 , wherein an upper circuit board (71) is arranged between the rotating carrier element (7) and the detection device (100) and the code reader (82) is attached to the upper circuit board (71).
  15. Rotary support device (200) according to Claim 14 , wherein a code reader circuit board (83) is arranged below the upper circuit board (71) and the code reader (82) is arranged on the code reader circuit board (83).
  16. Rotary support device (200) according to Claim 15 , wherein the upper circuit board (71) is perpendicular to the central spindle (2) and the code reader circuit board (83) runs parallel to the central spindle (2).
  17. Rotary support device (200) according to Claim 15 or 16 , wherein the upper circuit board (71) is further equipped with a processor and the processor is electrically connected to the code reader (82) to process the rotation position information detected by the code reader (82).
  18. Rotary support device (200) according to one of the Claims 14 until 17 , further comprising a middle circuit board (72) and the lower circuit board (11), wherein the middle circuit board (72) is arranged on the rotating carrier element (7) and is located between the upper circuit board (71) and the lower circuit board (11), wherein the middle circuit board (72) is arranged around the central spindle (2) or the bearing (5) or the bearing carrier element (3), and the middle circuit board (72) is able to supply energy to the upper circuit board (71) and the electromagnetic component (41).
  19. Rotary support device (200) according to Claim 18 , further comprising a wireless power supply module (6) wherein a receiving coil of the wireless power supply module (6) is arranged on the rotating carrier element (7), and the receiving coil and the central circuit board (72) are each arranged on two sides of the rotating carrier element (7).
  20. Rotary support device (200) according to one of the Claims 12 until 19 , wherein a gap between the code reader (82) and the code disk (81) is smaller than a width of the code disk (81) in an axial direction.

Description

Rotating support device for lidar and lidar The present application claims priority over the following Chinese patent applications: Chinese patent application no. 202310896713 X, filed with the National Intellectual Property Office of the People's Republic of China on [July 20, 2023] under the title "Rotating Support Device for Lidar and Lidar", and Chinese patent application no. 202310896488 X, submitted to the National Intellectual Property Administration of the People's Republic of China on [July 20, 2023] under the title "LIDAR DETECTION DEVICE", the contents of which are hereby incorporated in their entirety by reference. TECHNICAL AREA The present disclosure relates to the field of LiDAR and in particular to a rotary support device for a LiDAR and the LiDAR itself. BACKGROUND Light Detection and Ranging (LiDAR) is typically divided into mechanically rotating LiDAR, forward-looking LiDAR with scanning devices, and solid-state LiDAR. A mechanically rotating LiDAR refers to a LiDAR in which a transmitting and receiving device rotate 360°. The mechanically rotating LiDAR drives multiple vertically oriented laser emitters to continuously rotate horizontally to scan an environment. The mechanically rotating LiDAR comprises a rotating support and a detection device mounted on the rotating support. The detection device includes a transmitter and a receiver. The rotating support drives the detection device to rotate in order to detect the LiDAR's surroundings. The mechanically rotating LiDAR offers advantages such as a 360-degree field of view in the horizontal direction. However, existing mechanically rotating LiDARs have certain disadvantages. For example, the structure of the rotating support device is not sufficiently compact, the arrangement of elements is not properly optimized, radial distances between modules on a circuit board are large, and the number of axially arranged elements is relatively high. These disadvantages increase the size and cost of the LiDAR, which is unfavorable for assembly and mass production. SUMMARY Based on a rotary support device for a LiDAR and the LiDAR provided by the present disclosure, without impairing the performance of the LiDAR, the structure of the LiDAR can be compact, the arrangement of the elements can be more optimal, radial distances between modules on a printed circuit board can be reduced, the number of axially arranged elements can be reduced, and the size and cost of the LiDAR can be reduced, thereby facilitating the assembly and mass production of the LiDAR. According to a first aspect, embodiments of the present disclosure provide a rotary support device for a LiDAR, comprising a housing, a central spindle (central axis), a bearing support element, and a drive module. The housing is provided with a receiving cavity. The central spindle is arranged in the receiving cavity and fixed relative to the housing. The bearing support element is arranged in the receiving cavity and coupled to the central spindle via a bearing, enabling the bearing support element to rotate relative to the central spindle. The drive module is arranged in the receiving cavity and configured to drive the bearing support element to rotate. The drive module comprises a stator and a rotor. The rotor comprises an electromagnetic component, the electromagnetic component being attached to a side wall of the bearing support element. The stator comprises a magnetic component arranged on an outer surface of the electromagnetic component and fixed relative to the housing. Optionally, the electromagnetic component is arranged around the bearing support element, and the magnetic component is arranged around the electromagnetic component and is radially opposite the electromagnetic component. Optionally, the rotary support device also includes a stator mounting element. The stator mounting element is attached relative to the housing. The magnetic component is attached to the stator mounting element. Optionally, the magnetic component has a ring-shaped structure. The stator mounting element is arranged around a circumferential surface of the magnetic component. Optionally, the rotary support device also includes a wireless power supply module. The wireless power supply module is configured to power a component in the LiDAR that rotates with the bearing support element. Optionally, the wireless power supply module includes a transmitting coil and a receiving coil. The transmitting coil is mounted relative to the housing. The receiving coil is positioned axially opposite the transmitting coil and configured to rotate with the bearing support element. Optionally, the rotary support device also includes a lower circuit board. The lower circuit board is mounted relative to the housing and arranged around the central spindle, bearing, or bearing support element. The transmitting coil is mounted on the lower circuit board to supply power to it. Optionally, the rotary support device also includes a transmit