Laser radar rotating mirror

Abstract

The invention relates to a laser radar rotating mirror, which belongs to the technical field of laser radar scanning mirrors and comprises a rod mirror, a rotating shaft, a stator and a rotor. The two ends of the rotating shaft extend out of the shaft hole; the stator is of an annular structure and is wound with an electromagnetic coil; the stator sleeves the peripheral side, extending out of the shaft hole, of the rotating shaft in a clearance manner; the rotor is of an annular structure and has magnetism, and the rotor is arranged outside the stator in a clearance sleeving mode and fixed to the rod mirror. According to the invention, the rotating shaft fixed in the shaft hole of the rod mirror in a penetrating manner is rotationally connected to the two brackets, then the annular rotor is fixed on the rod mirror, and the rotating shaft, the rod mirror and the rotor are assembled together; when the electromagnetic coil wound on the stator is electrified, the rod mirror can be driven to rotate at a high speed, the rod mirror is prevented from being influenced by centrifugal force, and the high-speed rotation stability of the rod mirror is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser radar scanning mirrors, and in particular to a laser radar rotating mirror. Background Art

[0002] Radar is an electronic device that uses electromagnetic waves to detect targets. It is mainly composed of a turntable, a bracket, a motor, and a rod mirror with a polygonal cross-section. For example, the patent number is 202410356054.5, and the patent name is a radar device with a wide coverage range, wherein there are two brackets fixed on the turntable at intervals; the motor is fixed on one bracket; the rod mirror is located between the two brackets and one end of it rotates on the other bracket; in actual applications, the output shaft of the motor is fixed at the other end of the rod mirror, which can drive the rod mirror to rotate at high speed, scan a larger range, and obtain a larger field of view.

[0003] At present, radar generally requires high-frequency detection, which requires the rod mirror to rotate at high speed. However, since the output shaft of the motor is directly fixed on the other end of the rod mirror, it is very easy to be affected by centrifugal force during the high-speed rotation of the mirror, resulting in unstable operation and affecting the accuracy of laser detection.

[0004] Therefore, how to design a rotating mirror laser radar that has a firm connection, runs smoothly and does not affect the laser measurement accuracy is an urgent problem that technical personnel in this field need to solve. Summary of the invention

[0005] The invention provides a laser radar rotating mirror, which solves the technical problems that the existing rod mirror runs unsteadily and has low laser measurement accuracy after high-speed rotation.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: a laser radar rotating mirror, the laser radar includes a turntable and a bracket, the bracket is two and fixed on the turntable at intervals; the laser radar rotating mirror includes: a rod mirror with a polygonal cross section, a rotating shaft, a stator and a rotor,

[0007] The rod mirror is located between the two brackets and has an axial hole passing through both ends thereof; the rotating shaft is fixed in the axial hole and both ends thereof extend out of the axial hole, and the two ends of the rotating shaft extending out of the axial hole are rotatably connected to the two brackets through bearings respectively; the stator is an annular structure and is wound with an electromagnetic coil, and the stator gap is sleeved on the outer peripheral side of the rotating shaft extending out of the axial hole and is fixed on the corresponding bracket; the rotor is an annular structure and is magnetic, and the rotor gap is sleeved outside the stator and is fixed on the rod mirror, so as to drive the rod mirror to rotate after the electromagnetic coil is energized.

[0008] The beneficial effects of the present invention are: improving the structure of the traditional laser radar scanning mirror, first using the rotating shaft inserted into the shaft hole of the rod mirror to rotatably connect to the two brackets, and then using the annular rotor to fix on the rod mirror, assembling the rotating shaft, the rod mirror and the rotor together, because the annular stator gap is sleeved outside the rotating shaft and inserted into the rotor and fixed on the corresponding bracket, when the electromagnetic coil wound on the stator is energized, it can drive the rod mirror to rotate at high speed, avoiding the rod mirror from being affected by centrifugal force, improving the stability of the high-speed rotation of the rod mirror, and improving the detection accuracy of the laser radar.

[0009] Based on the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the cross-section of the rod mirror is a triangle, a quadrilateral, a pentagon, a hexagon, a heptagon or an octagon.

[0011] Furthermore, both ends of the rod mirror are provided with weight-reducing grooves.

[0012] A further beneficial effect of adopting the above method is that by opening weight-reducing grooves at both ends of the rod mirror, the weight of the rod mirror can be reduced, the rotation speed of the rod mirror can be increased, and the preparation cost of the rod mirror can be reduced.

[0013] Furthermore, it also includes a shaft sleeve, the shaft hole passes through the two weight-reducing grooves; there are two shaft sleeves and one end of each shaft sleeve is respectively fixed to the bottom of the two weight-reducing grooves, and the inner holes of the two shaft sleeves are relatively connected to the shaft hole; the two ends of the rotating shaft extending out of the shaft hole respectively pass through the two shaft sleeves; the stator gap is sleeved on the outer peripheral side of the rotating shaft passing through the shaft sleeve.

[0014] The above-mentioned further beneficial effect is: the two ends of the rotating shaft extending out of the rod mirror axis hole are respectively passed through two bushings, and since one end of the two bushings is respectively fixed to the bottom of the weight-reducing grooves at both ends of the rod mirror, the firmness of the connection between the rod mirror and the rotating shaft can be improved.

[0015] Furthermore, the stator includes a stator seat and a stator ring, the stator seat includes a bearing sleeve and a connecting ring, the bearing sleeve is gap-sleeved on the outer peripheral side of the rotating shaft passing through the sleeve and is fixed on the corresponding bracket; the bearing close to the bearing sleeve is inserted and fixed in the bearing sleeve; the connecting ring is located between the bearing sleeve and the rod mirror and is gap-sleeved on the outer peripheral side of the rotating shaft passing through the sleeve, and the end of the connecting ring away from the rod mirror is fixed to the end of the bearing sleeve close to the rod mirror; the stator ring is fixed on the connecting ring; the electromagnetic coil is wound on the stator ring; and the rotor is gap-sleeved outside the stator ring.

[0016] Furthermore, the rotor includes a rotor ring, a rotor seat and a connecting plate, the rotor ring is magnetic and is gap-mounted outside the stator ring; the rotor seat is an annular structure and is sleeved on the rotor ring; the connecting plate is an annular structure, the connecting plate is fixed to one end of the rotor seat close to the rod mirror and is sleeved on the corresponding shaft sleeve.

[0017] A further beneficial effect of the above method is that the annular connecting plate is directly sleeved on the corresponding shaft sleeve, which can improve the convenience and stability of the connection between the rotor and the rod mirror.

[0018] Furthermore, it also includes a nut and a gasket, wherein one end of the rotating shaft away from the stator passes through the corresponding bearing and an external thread is provided on the shaft wall of the passing end; the gasket is an annular structure, and the gasket is fixed on the outer periphery of the rotating shaft passing through the corresponding bearing and one side thereof contacts the inner ring surface of the corresponding bearing; the nut is threadedly connected to the external thread of the rotating shaft and pressed against the other side of the gasket.

[0019] The above method has the further beneficial effect of firstly passing the end of the rotating shaft away from the stator through the corresponding bearing and setting an external thread on the shaft wall at the outgoing end, and then threading the nut on the external thread of the rotating shaft, thereby preventing the rotating shaft from being separated from the corresponding bearing and improving the stability and firmness of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a laser radar rotating mirror of the present invention;

[0021] Figure 2 This is a schematic diagram of the assembly structure of a rod mirror, a rotating shaft, a stator, a rotor, a nut and a gasket in a laser radar rotating mirror of the present invention;

[0022] Figure 3 The present invention is a schematic diagram of the disassembled structure of a rod mirror, a rotating shaft, a stator, a rotor, a nut and a gasket in a laser radar rotating mirror.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Rod mirror, 11. Weight reduction groove, 2. Rotating shaft, 3. Stator, 31. Stator seat, 311. Bearing sleeve, 312. Connecting ring, 32. Stator ring, 4. Rotor, 41. Rotor ring, 42. Rotor seat, 43. Connecting plate, 5. Turntable, 6. Bracket, 7. Bearing, 8. Bushing, 9. Nut, 10. Gasket. DETAILED DESCRIPTION

[0025] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, a laser radar rotating mirror, the laser radar includes a turntable 5 and a bracket 6, two brackets 6 are fixed on the turntable 5 at intervals; the laser radar rotating mirror includes: a rod mirror 1 with a polygonal cross section, a rotating shaft 2, a stator 3 and a rotor 4,

[0027] The rod mirror 1 is located between two brackets 6 and has an axial hole passing through both ends; the rotating shaft 2 is fixed in the axial hole and both ends thereof extend out of the axial hole, and the two ends of the rotating shaft 2 extending out of the axial hole are rotatably connected to the two brackets 6 through bearings 7 respectively; the stator 3 is an annular structure and is wound with an electromagnetic coil, and the stator 3 is gap-mounted on the outer peripheral side of the axial hole of the rotating shaft 2 and is fixed on the corresponding bracket 6; the rotor 4 is an annular structure and is magnetic, and the rotor 4 is gap-mounted outside the stator 3 and is fixed on the rod mirror 1, so as to drive the rod mirror 1 to rotate after the electromagnetic coil is energized.

[0028] Specifically, the cross section of the rod mirror 1 can be a triangle, a quadrilateral, a pentagon, a hexagon, a heptagon or an octagon.

[0029] like Figure 3 As shown, in some specific embodiments, both ends of the rod mirror 1 are provided with a weight-reducing groove 11 .

[0030] like Figure 3 As shown, in some specific embodiments, a shaft sleeve 8 may also be included, and the shaft hole passes through the two weight-reducing grooves 11; there are two shaft sleeves 8 and one end of each shaft sleeve is respectively fixed to the bottom of the two weight-reducing grooves 11, and the inner holes of the two shaft sleeves 8 are relatively connected to the shaft hole; the two ends of the rotating shaft 2 extending out of the shaft hole respectively pass through the two shaft sleeves 8; the stator 3 is gap-sleeved on the outer peripheral side of the rotating shaft 2 passing through the shaft sleeve 8.

[0031] like Figure 3 As shown, in some specific embodiments, the stator 3 may include a stator seat 31 and a stator ring 32, the stator seat 31 includes a bearing sleeve 311 and a connecting ring 312, the bearing sleeve 311 is gap-sleeved on the outer peripheral side of the rotating shaft 2 passing through the sleeve 8 and is fixed on the corresponding bracket 6; the bearing 7 close to the bearing sleeve 311 is inserted and fixed in the bearing sleeve 311; the connecting ring 312 is located between the bearing sleeve 311 and the rod mirror 1 and is gap-sleeved on the outer peripheral side of the rotating shaft 2 passing through the sleeve 8, and the end of the connecting ring 312 away from the rod mirror 1 is fixed to the end of the bearing sleeve 311 close to the rod mirror 1; the stator ring 32 is sleeved on the connecting ring 312; the electromagnetic coil is wound on the stator ring 32; the rotor 4 is gap-sleeved outside the stator ring 32.

[0032] like Figure 3As shown, in some specific embodiments, the rotor 4 may include a rotor ring 41, a rotor seat 42 and a connecting plate 43. The rotor ring 41 is magnetic and is gap-mounted outside the stator ring 32; the rotor seat 42 is an annular structure and is fixed on the rotor ring 41; the connecting plate 43 is an annular structure, and the connecting plate 43 is fixed to one end of the rotor seat 42 close to the rod mirror 1 and is fixed on the corresponding shaft sleeve 8.

[0033] like Figure 3 As shown, in some specific embodiments, a nut 9 and a gasket 10 may also be included. The end of the rotating shaft 2 away from the stator 3 passes through the corresponding bearing 7 and the shaft wall of the passing end is provided with an external thread; the gasket 10 is an annular structure, and the gasket 10 is sleeved on the outer periphery of the rotating shaft 2 passing through the corresponding bearing 7 and one side thereof contacts the inner ring surface of the corresponding bearing 7; the nut 9 is threadedly connected to the external thread of the rotating shaft 2 and pressed against the other side of the gasket 10.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser radar rotating mirror, the laser radar comprising a rotating disk (5) and a bracket (6), wherein the bracket (6) is two and is fixed on the rotating disk (5) at intervals; characterized in that: include: A rod mirror (1) with a polygonal cross section, the rod mirror (1) is located between the two brackets (6) and is provided with an axial hole passing through both ends in its axial direction; A rotating shaft (2), the rotating shaft (2) is inserted into the shaft hole and both ends of the rotating shaft (2) extend out of the shaft hole, and the two ends of the rotating shaft (2) extending out of the shaft hole are rotatably connected to the two brackets (6) via bearings (7) respectively; A stator (3), the stator (3) being an annular structure and wound with an electromagnetic coil, the stator (3) being loosely sleeved on the outer peripheral side of the rotating shaft (2) extending out of the shaft hole and being fixed on the corresponding bracket (6); A rotor (4) is an annular structure and has magnetism. The rotor (4) is sleeved outside the stator (3) and fixed on the rod mirror (1) to drive the rod mirror (1) to rotate when the electromagnetic coil is energized.

2. A laser radar rotating mirror according to claim 1, characterized in that: The cross section of the rod mirror (1) is a triangle, a quadrilateral, a pentagon, a hexagon, a heptagon or an octagon.

3. The laser radar rotating mirror according to claim 1, characterized in that: Both ends of the rod mirror (1) are provided with weight-reducing grooves (11).

4. The laser radar rotating mirror according to claim 3, characterized in that: It also includes a shaft sleeve (8), the shaft hole passes through the two weight-reducing grooves (11); the shaft sleeve (8) is two and one end of each is fixed to the bottom of the two weight-reducing grooves (11), and the inner holes of the two shaft sleeves (8) are relatively connected to the shaft hole; the two ends of the rotating shaft (2) extending out of the shaft hole respectively pass through the two shaft sleeves (8); the stator (3) is loosely sleeved on the outer peripheral side of the rotating shaft (2) passing through the shaft sleeve (8).

5. The laser radar rotating mirror according to claim 4, characterized in that: The stator (3) comprises a stator seat (31) and a stator ring (32); the stator seat (31) comprises a bearing sleeve (311) and a connecting ring (312); the bearing sleeve (311) is loosely sleeved on the outer peripheral side of the shaft (2) passing through the shaft sleeve (8) and is fixed on the corresponding bracket (6); the bearing (7) close to the bearing sleeve (311) is inserted into the bearing sleeve (311); the connecting ring (312) is located on the bearing sleeve (311) and the rod mirror (1) and is gap-sleeved on the outer peripheral side of the rotating shaft (2) passing through the shaft sleeve (8); one end of the connecting ring (312) away from the rod mirror (1) is fixed to one end of the bearing sleeve (311) close to the rod mirror (1); the stator ring (32) is sleeved on the connecting ring (312); the electromagnetic coil is wound on the stator ring (32); and the rotor (4) is gap-sleeved outside the stator ring (32).

6. The laser radar rotating mirror according to claim 5, characterized in that: The rotor (4) comprises a rotor ring (41), a rotor seat (42) and a connecting plate (43); the rotor ring (41) is magnetic and is sleeved outside the stator ring (32) with a gap; the rotor seat (42) is an annular structure and is sleeved on the rotor ring (41); the connecting plate (43) is an annular structure, and is fixed to one end of the rotor seat (42) close to the rod mirror (1) and sleeved on the corresponding shaft sleeve (8).

7. A laser radar rotating mirror according to any one of claims 1 to 6, characterized in that: It also includes a nut (9) and a gasket (10); one end of the rotating shaft (2) away from the stator (3) passes through the corresponding bearing (7) and the shaft wall of the passing end is provided with an external thread; the gasket (10) is an annular structure, the gasket (10) is sleeved on the outer periphery of the rotating shaft (2) passing through the corresponding bearing (7) and one side surface of the gasket is in contact with the inner ring surface of the corresponding bearing (7); the nut (9) is threadedly connected to the external thread of the rotating shaft (2) and pressed against the other side surface of the gasket (10).

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