Double-bearing laser radar

Abstract

The invention relates to a dual-bearing laser radar, which comprises a shell internally provided with a mounting cavity, and a bottom plate arranged at the bottom of the mounting cavity, the core plate is arranged above the bottom plate; the rotating assembly comprises a main bearing arranged above the bottom plate; one end of the rotating bracket is connected with the main bearing and the other end is connected with the core plate; the rotor is arranged on the periphery of the stator and is in telecommunication connection with the stator; the optical assembly comprises an optical module which is connected with the rotating bracket and is driven to rotate; an auxiliary bearing with the same rotating axis as the optical module is arranged between the upper end face of the optical module and the shell. A bearing rubber sleeve is arranged between the auxiliary bearing and the optical module; a power supply assembly. The bearing rubber sleeve of the laser radar is made of the flexible material, rotation impact caused by different axes can be absorbed, and noise is reduced; part of assembly tolerance in the height direction can be absorbed; and up-and-down jumping of rotation of the radar core can be better buffered.

Description

Technical Field

[0001] The present invention relates to the technical field of laser radar, and in particular to a dual-bearing laser radar. Background Art

[0002] Since the emergence of LiDAR, it has been applied to many fields such as robots, AGVs and automobiles. With the continuous increase in demand, the installation requirements of LiDAR are also getting higher and higher. Early LiDAR only considered the requirements of horizontal placement, and there were no strict tests for vertical and inverted installations. As these installation methods become more and more common, it is found that the life of rotating LiDAR is significantly reduced when installed vertically and inverted, and the operating stability and abnormal noise will seriously affect the installation effect. In order to solve the above problems, the industry introduced the main and auxiliary double bearing solution, but the main and auxiliary double bearings are not installed on the same part, so the coaxiality of the main and auxiliary double bearings cannot be completely consistent; in addition, the assembly and production of the shell also have a certain degree of position, which eventually causes the bearing to be stuck or abnormal noise. Summary of the invention

[0003] The purpose of the present invention is to provide a dual-bearing laser radar in order to overcome at least one of the defects of the above-mentioned prior art. The laser radar utilizes the flexible characteristics of silicone to absorb the collision of the secondary bearing and solve the problems caused by the concentricity of the secondary bearing and the main bearing. It can significantly improve the operating stability of the rotating laser radar and significantly improve the laser radar in terms of abnormal noise and life.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A dual-bearing laser radar comprises a housing having a mounting cavity therein, and:

[0006] A base plate disposed at the bottom of the installation cavity;

[0007] A core plate disposed above the base plate;

[0008] A rotating assembly, the rotating assembly comprising:

[0009] A main bearing disposed above the base plate;

[0010] A rotating bracket, one end of which is connected to the main bearing, and the other end of which is connected to the core board to drive the core board to rotate;

[0011] A stator and a rotor are arranged in the rotating bracket, the rotor is arranged outside the stator, and the two are connected by telecommunication;

[0012] An optical component, wherein the optical component comprises an optical module connected to the rotating bracket and driven to rotate, wherein the optical module is used to emit a projection light beam to the target to be measured and receive a reflection light beam reflected by the target to be measured, and then convert the reflection light beam into an electrical signal; a secondary bearing having the same rotation axis as the optical module is arranged between the upper end surface of the optical module and the housing; a bearing rubber sleeve is arranged between the secondary bearing and the optical module;

[0013] A power supply component receives the electrical signal transmitted by the optical component and is used to supply power to the rotating component to provide power for the rotating bracket to rotate, and to supply power to the optical component to provide power for the optical component to operate.

[0014] Furthermore, the housing includes a bottom shell, a bottom cover connected to the bottom surface of the bottom shell, and an optical cover connected to the top surface of the bottom shell, and the three surround each other to form a mounting cavity;

[0015] The bottom plate is arranged above the bottom cover; the optical cover is connected to the secondary bearing to support the secondary bearing.

[0016] Further, the optical assembly further comprises a photoelectric transmission element, and the photoelectric transmission element comprises an upper photoelectric tube and a lower photoelectric tube;

[0017] The upper photoelectric tube is arranged on the bottom plate, and the lower photoelectric tube is arranged on the core plate;

[0018] The core board converts the reflected light beam into an electrical signal and transmits it to the power supply component through the upper photoelectric tube and the lower photoelectric tube.

[0019] Furthermore, the optical component also includes an encoder arranged on the core board and used for obtaining the rotation speed of the optical component.

[0020] Furthermore, the core board drives the encoder and the optical module to rotate together.

[0021] Further, the power supply assembly includes an external wire and a power supply member;

[0022] One end of the external wire extends into the installation cavity and is connected to the base plate, and the other end is connected to an external power supply device for supplying power to the rotating component; the power supply is arranged on the base plate and is used to supply power to the optical component.

[0023] Furthermore, the power supply component includes a power supply coil and a power receiving coil, the power supply coil is connected to the base plate and is used to obtain alternating current, the power receiving coil is arranged inside the rotating bracket and is connected to the power supply coil, and the power receiving coil generates an induced electromotive force based on the induced electromagnetic field generated by the power supply coil and supplies power to the core board.

[0024] Furthermore, the main bearing and the secondary bearing are located on the same axis, and the optical module and the core board are controlled to rotate on the same axis through the secondary bearing.

[0025] Furthermore, the auxiliary bearing and the bearing rubber sleeve are located on the same axis.

[0026] Furthermore, the bearing rubber sleeve is made of silicone material.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The present invention provides a dual-bearing laser radar, wherein the bearing rubber sleeve of the laser radar is made of a flexible material, which can absorb the rotation impact caused by different axes and reduce noise; it can also absorb the assembly tolerance of part of the height direction; and it can also buffer the up and down bounce of the radar core rotation;

[0029] (2) The present invention provides a dual-bearing laser radar, the bearing rubber sleeve of which is made of silicone material, which has self-lubricating properties and can increase the life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a cross-sectional view of a dual-bearing coaxial laser radar in an embodiment;

[0031] As shown in the figure: 1- bottom shell; 2- stator; 3- rotor; 4- rotating bracket; 5- optical cover; 6- optical module; 7- auxiliary bearing; 8- bearing rubber sleeve; 9- core board; 10- encoder; 11- main bearing; 12- external wiring; 13- bottom plate; 14- power supply coil; 15- receiving coil; 16- bottom cover; 17- upper photoelectric tube; 18- lower photoelectric tube. DETAILED DESCRIPTION

[0032] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0033] Example

[0034] After the dual-bearing solution is adopted for the existing rotating laser, due to the optical limitation of the radar, the secondary bearing and the main bearing cannot be assembled on the same part, resulting in low coaxiality of the two bearings. The coaxiality problem of the secondary bearing and the main bearing causes large rotation damping in a certain direction, which is manifested as unstable rotation speed; in addition, the low concentricity of the secondary bearing and the main bearing also affects the life of the radar. This embodiment provides a dual-bearing laser radar, the specific structure of which is shown in Figure 1 , comprising a housing having a mounting cavity therein, and:

[0035] A bottom plate 13 disposed at the bottom of the installation cavity;

[0036] A core plate 9 disposed above the bottom plate 13;

[0037] A rotating assembly, the rotating assembly comprising:

[0038] A main bearing 11 disposed above the base plate 13;

[0039] A rotating bracket 4, one end of which is connected to the main bearing 11, and the other end of which is connected to the core plate 9, so as to drive the core plate 9 to rotate;

[0040] A stator 2 and a rotor 3 are arranged in the rotating bracket 4, and the rotor 3 is arranged outside the stator 2, and the two are connected by telecommunication;

[0041] An optical component, wherein the optical component comprises an optical module 6 connected to the rotating bracket 4 and driven to rotate, wherein the optical module 6 is used to emit a projection light beam to the target to be measured and receive a reflection light beam reflected by the target to be measured, and then convert the reflection light beam into an electrical signal; a secondary bearing 7 having the same rotation axis as the optical module 6 is arranged between the upper end surface of the optical module 6 and the housing; a bearing rubber sleeve 8 is arranged between the secondary bearing 7 and the optical module 6; wherein the bearing rubber sleeve 8 is made of a flexible material, can absorb the rotation impact caused by different axes, and reduce noise; in addition, the bearing rubber sleeve 8 can also absorb part of the assembly tolerance in the height direction, and buffer the up and down jump of the radar core rotation;

[0042] A power supply component receives the electrical signal transmitted by the optical component, and is used to supply power to the rotating component to provide power for the rotating bracket 4 to rotate, and to supply power to the optical component to provide power for the optical component to operate.

[0043] In this embodiment, the shell includes a bottom shell 1, a bottom cover 16 connected to the bottom surface of the bottom shell 1, and an optical outer cover 5 connected to the top surface of the bottom shell 1, and the three together form an installation cavity; the bottom plate 13 is arranged above the bottom cover 16; the optical outer cover 5 is connected to the auxiliary bearing 7 to support the auxiliary bearing 7.

[0044] In this embodiment, the optical component also includes a photoelectric transmission component, which includes an upper phototube 17 and a lower phototube 18; the upper phototube 17 is arranged on the base plate 13, and the lower phototube 18 is arranged on the core board 9; the core board 9 converts the reflected light beam into an electrical signal and transmits it to the power supply component through the upper phototube 17 and the lower phototube 18.

[0045] In this embodiment, the optical component further includes an encoder 10 disposed on the core board 9 and used for acquiring the rotation speed of the optical component.

[0046] In this embodiment, the core board 9 drives the encoder 10 and the optical module 6 to rotate together.

[0047] In this embodiment, the power supply component includes an external wire 12 and a power supply member; one end of the external wire 12 extends into the installation cavity and is connected to the base plate 13, and the other end is connected to an external power supply device for supplying power to the rotating component; the power supply member is arranged on the base plate 13 and is used to supply power to the optical component.

[0048] In this embodiment, the power supply component includes a power supply coil 14 and a power receiving coil 15. The power supply coil 14 is connected to the base plate 13 and is used to obtain alternating current. The power receiving coil 15 is arranged inside the rotating bracket 5 and is connected to the power supply coil 14. The power receiving coil 15 generates an induced electromotive force based on the induced electromagnetic field generated by the power supply coil 14 and supplies power to the core board 9.

[0049] In this embodiment, the main bearing 11 and the secondary bearing 7 are located on the same axis, and the optical module 6 and the core board 9 are controlled to rotate on the same axis through the secondary bearing 7 .

[0050] In this embodiment, the auxiliary bearing 7 and the bearing rubber sleeve 8 are on the same axis. Preferably, the bearing rubber sleeve 8 is made of a self-lubricating silicone material, which can increase the life of the bearing.

[0051] Working principle:

[0052] The laser radar provided in this embodiment supplies power to the bottom plate 13 through the external wiring 12. The bottom plate 13 controls the stator 2 to drive the rotor 3 to rotate and drive the rotating bracket 4 to rotate synchronously. The main bearing 11 supports the rotating bracket 4 to rotate. The rotating bracket 4 drives the core board 9 to rotate. The core board 9 rotates together with the encoder 10 and the optical module 6. The optical module 6 is controlled by the secondary bearing 7 to rotate coaxially. The bearing rubber sleeve 8 buffers the shaking of the optical module 6 and the secondary bearing 7. The outer cover 5 supports the rotation of the inner wall of the secondary bearing 7. At the same time, the bottom plate 13 controls the power supply coil 14 to supply power to the receiving coil 15. The receiving coil 15 supplies power to the core board 9. The core board 9 transmits and receives light signals through the optical component 6, converts them into photoelectric signals, sends them to the lower photoelectric tube 18 through the upper phototube 17, and converts them into electrical signals through the bottom plate 13 and transmits them from the external wiring 12.

[0053] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A dual-bearing laser radar, characterized in that: The invention comprises a housing having a mounting cavity therein, and: A bottom plate (13) arranged at the bottom of the installation cavity; A core plate (9) disposed above the bottom plate (13); A rotating assembly, the rotating assembly comprising: A main bearing (11) disposed above the base plate (13); A rotating bracket (4), one end of the rotating bracket (4) is connected to the main bearing (11), and the other end is connected to the core plate (9) to drive the core plate (9) to rotate; A stator (2) and a rotor (3) are arranged in the rotating bracket (4), wherein the rotor (3) is arranged outside the stator (2), and the two are connected in telecommunication; An optical assembly, the optical assembly comprising an optical module (6) connected to the rotating bracket (4) and driven to rotate; a secondary bearing (7) having the same rotation axis as the optical module (6) is arranged between the upper end surface of the optical module (6) and the housing; a bearing rubber sleeve (8) is arranged between the secondary bearing (7) and the optical module (6); A power supply component receives the electrical signal transmitted by the optical component and is used to supply power to the rotating component to provide power for the rotating bracket (4) to rotate, and to supply power to the optical component to provide power for the optical component to operate.

2. A dual-bearing laser radar according to claim 1, characterized in that: The housing comprises a bottom shell (1), a bottom cover (16) connected to the bottom surface of the bottom shell (1), and an optical cover (5) connected to the top surface of the bottom shell (1), the three of which together form a mounting cavity; The bottom plate (13) is arranged above the bottom cover (16); the optical cover (5) is connected to the auxiliary bearing (7) to support the auxiliary bearing (7).

3. A dual-bearing laser radar according to claim 1, characterized in that: The optical assembly further comprises a photoelectric transmission element, wherein the photoelectric transmission element comprises an upper photoelectric tube (17) and a lower photoelectric tube (18); The upper photoelectric tube (17) is arranged on the bottom plate (13), and the lower photoelectric tube (18) is arranged on the core plate (9); The core board (9) converts the reflected light beam into an electrical signal and transmits the electrical signal to the power supply component through the upper photoelectric tube (17) and the lower photoelectric tube (18).

4. A dual-bearing laser radar according to claim 1, characterized in that: The optical component further comprises an encoder (10) arranged on the core board (9) and used for acquiring the rotation speed of the optical component.

5. A dual-bearing laser radar according to claim 4, characterized in that: The core board (9) drives the encoder (10) and the optical module (6) to rotate together.

6. A dual-bearing laser radar according to claim 1, characterized in that: The power supply assembly comprises an external wire (12) and a power supply member; One end of the external wire (12) extends into the installation cavity and is connected to the base plate (13), and the other end is connected to an external power supply device for supplying power to the rotating assembly; The power supply is arranged on the base plate (13) and is used to supply power to the optical component.

7. A dual-bearing laser radar according to claim 6, characterized in that: The power supply component comprises a power supply coil (14) and a power receiving coil (15); the power supply coil (14) is connected to the base plate (13) and is used to obtain alternating current; the power receiving coil (15) is arranged inside the rotating bracket (5) and is connected to the power supply coil (14); the power receiving coil (15) generates an induced electromotive force based on the induced electromagnetic field generated by the power supply coil (14) and supplies power to the core board (9).

8. The dual-bearing laser radar according to claim 1, characterized in that: The main bearing (11) and the auxiliary bearing (7) are located on the same axis, and the optical module (6) and the core plate (9) are controlled to rotate on the same axis through the auxiliary bearing (7).

9. The dual-bearing laser radar according to claim 1, characterized in that: The auxiliary bearing (7) and the bearing rubber sleeve (8) are located on the same axis.

10. The dual-bearing laser radar according to claim 1, characterized in that: The bearing rubber sleeve (8) is made of silica gel.

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