Protection device for protecting laser radar and prolonging service life of laser radar

Abstract

The invention relates to the technical field of automobile laser radars, and provides a protection device for protecting a laser radar and prolonging the service life of the laser radar, which comprises a shell, a rotating motor is mounted in the shell, and the output end of the rotating motor is connected with a coaxially arranged rotating shaft through a coupler. A worm and a driving bevel gear are fixedly arranged on the peripheral face of the rotating shaft in a sleeving mode, a bottom round frame is rotatably installed in the shell, and through arrangement of a rotating motor, folding covering cloth and other structures, when the radar body needs to be used, the rotating motor is started, the rotating motor enables the radar body to stretch out of the shell for use, and meanwhile, the rotating motor is driven to rotate; the limiting sliding seat drives the folding covering cloth to unfold for shading sun and rain, the radar body is protected against sun and rain while the influence of falling objects such as rainwater and leaves on radar precision is reduced, the service life of equipment is prolonged, and through the technical scheme, the problems that in the prior art, the service life is short and heat dissipation is insufficient are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive laser radar, and in particular to a protection device for protecting a laser radar and extending its service life. Background Art

[0002] At present, automotive laser radar, full name Light Detection And Ranging (LiDAR), is an advanced sensor technology specially designed for automotive autonomous driving and assisted driving systems. This technology emits laser beams to the surrounding environment and receives light signals reflected by objects. It uses the laser's time of flight (ToF) principle or phase difference measurement principle to accurately calculate the distance, direction, speed and other characteristic quantities between the target and the vehicle. Laser radar can not only create a three-dimensional image of the surrounding environment, but also provide detailed information such as the reflectivity and texture of the target surface, thereby achieving high-precision and high-resolution environmental perception.

[0003] First, traditional radar systems often rely on manual intervention for cleaning and maintenance, which is not only inefficient but also difficult to ensure the thoroughness and timeliness of cleaning. Especially in bad weather or complex road conditions, dust, moisture and other pollutants are easily accumulated on the radar surface, seriously affecting its detection accuracy and lifespan. Secondly, traditional solutions are often relatively passive when facing the sun and rain problems faced by radar equipment when used outdoors. For example, simple covering or waterproofing cannot effectively isolate the intrusion of natural factors such as ultraviolet rays, rain and fallen leaves. Furthermore, traditional radar systems often use passive cooling or simple fan assistance in heat dissipation design, which cannot meet the needs of efficient heat dissipation in high temperature or closed environments. Summary of the invention

[0004] The present invention proposes a protection device for protecting a laser radar and extending its service life, thereby solving the problems of low service life and insufficient heat dissipation in related technologies.

[0005] The technical solution of the present invention is as follows: A protection device for protecting a laser radar and extending the service life of the laser radar comprises a shell, a rotating motor is installed inside the shell, an output end of the rotating motor is connected to a coaxially arranged rotating shaft through a coupling, a worm and an active bevel gear are fixedly sleeved on the outer circumference of the rotating shaft, a bottom circular frame is rotatably installed inside the shell, an inner ring bevel gear is fixedly connected to the inner wall of the bottom circular frame, the active bevel gear is meshed with the inner ring bevel gear, the top of the bottom circular frame is fixedly connected to an inner frame body by screws, a cleaning brush is fixedly connected to the inner wall of the inner frame body, a long shaft is rotatably installed inside the shell, a worm gear is fixedly sleeved on the outer circumference of the long shaft, and the top of the long shaft is fixedly connected to A transmission screw is connected, a sliding base is movably sleeved on the outer circumference of the transmission screw, four symmetrically arranged limit blocks are fixedly connected to the outer circumference of the sliding base, a radar body is installed on the top of the sliding base, the internal sliding assembly of the long axis has a limit shaft, and the outer circumference of the limit shaft is respectively fixedly sleeved with an active bevel gear and a limit disc, four circumferentially evenly distributed follower shafts are rotatably installed inside the radar body, one end of the follower shaft is fixedly connected with a rotating screw, a follower bevel gear is fixedly sleeved on the outer circumference of the rotating screw, the four follower bevel gears are all meshed with the active bevel gear, a limit sliding block is movably sleeved on the outer circumference of the rotating screw, and one side of every two limit sliding blocks is commonly connected with a folding cover cloth.

[0006] As a preferred solution of the present invention, four semicircular opening and closing doors evenly distributed around the circumference are rotatably installed on the top of the radar body, a top block is fixedly connected to the inner wall of the semicircular opening and closing door, both sides of the semicircular opening and closing door are fixedly connected to a connecting shaft, the connecting shaft is rotatably installed inside the radar body, and a torsion spring is arranged on the connecting shaft.

[0007] As a preferred solution of the present invention, an air inlet is provided on the outer circumferential surface of the inner frame, an air inlet filter is provided on the outer circumferential surface of the shell, an air outlet filter is provided at the bottom of the shell, a fixed circular frame is fixedly sleeved on the outer circumferential surface of the inner frame, a rotating motor is installed at the bottom of the fixed circular frame, the output end of the rotating motor is connected to a coaxially arranged rotating shaft through a coupling, a meshing gear is fixedly sleeved on the outer circumferential surface of the rotating shaft, a rotating disk is rotatably installed inside the fixed circular frame, an internal gear is fixedly connected to the inner wall of the rotating disk, the meshing gear is meshed with the internal gear, and an axial flow fan blade is fixedly sleeved on the outer circumferential surface of the rotating disk.

[0008] As a preferred solution of the present invention, a top cover is fixedly connected to the top of the shell, a servo motor is installed inside the top cover, eight circumferentially evenly distributed straight shafts are rotatably installed inside the top cover, one of the straight shafts is connected to the output end of the servo motor through a coupling, a rotating gear is fixedly sleeved on the outer circumference of the straight shaft, a rotating disk is rotatably installed inside the top cover, an internal gear is fixedly connected to the inner wall of the rotating disk, the eight rotating gears are all meshed with the internal gear, and eight circumferentially evenly distributed sliding racks are slidably assembled inside the top cover, the sliding racks are meshed with the rotating gears, and a closing plate is fixedly connected to the top of the sliding racks.

[0009] As a preferred solution of the present invention, four mounting seats with evenly distributed circular axes are fixedly connected to the bottom of the shell, and two symmetrically arranged mounting holes are provided on the mounting seats.

[0010] As a preferred solution of the present invention, eight symmetrically arranged limiting rods are fixedly connected to the bottom of the top cover, and every two limiting rods pass through the interior of one limiting block.

[0011] As a preferred solution of the present invention, a sealing block is provided on one side and the top of the closing plate, and a clamping groove matched with the sealing block is provided on the other side of the closing plate, and the sealing block is clamped inside the clamping groove.

[0012] As a preferred embodiment of the present invention, a plurality of round balls evenly distributed around the circumference are installed for rotation inside the bottom circular frame, a plurality of auxiliary balls evenly distributed around the circumference are installed for rotation inside the rotating disc, and a plurality of rotating balls evenly distributed around the circumference are installed for rotation inside the rotating disc. The round balls, the auxiliary balls and the rotating balls assist the rotation of the bottom circular frame, the rotating disc and the rotating disc respectively.

[0013] The working principle and beneficial effects of the present invention are:

[0014] 1. The present invention arranges structures such as a rotating motor and a folding cover cloth. When the radar body needs to be used, the rotating motor is turned on, and the rotating motor causes the radar body to extend out of the shell for use. At the same time, the limiting sliding seat drives the folding cover cloth to unfold to provide sunshade and rain protection. While reducing the impact of falling objects such as rainwater and leaves on the radar accuracy, the radar body is protected from the sun and rain, thereby increasing the service life of the equipment.

[0015] 2. The present invention arranges structures such as a rotating motor and axial flow fan blades. When the radar is in use, the rotating motor is turned on. The rotation of the rotating motor causes the axial flow fan blades to rotate. The axial flow fan blades compress the air and blow it into the interior of the inner frame, thereby cooling and ventilating the bottom of the radar body and the interior of the entire device.

[0016] 3. The present invention arranges structures such as a servo motor and a closing plate. When the radar body is extended or retracted into the device, the servo motor starts to rotate, so that the closing plate is opened and closed. A sealing block is arranged on the closing plate, and when the radar body is retracted, the top is sealed and preserved, thereby improving its protection level. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a bottom view of the overall structure of the present invention;

[0020] Figure 3 It is a cross-sectional view of the internal structure of the shell of the present invention;

[0021] Figure 4 This is a cross-sectional view of the internal structure of the fixed circular frame of the present invention;

[0022] Figure 5 It is a cross-sectional view of the internal structure of the inner frame of the present invention;

[0023] Figure 6 This is a bottom view of the internal structure of the inner frame of the present invention;

[0024] Figure 7 It is a schematic diagram of the transmission structure of the closing plate of the present invention;

[0025] Figure 8 This is a schematic diagram of the transmission structure of the radar body of the present invention;

[0026] Fig. 9 This is a schematic diagram of the transmission structure of the folding cover cloth of the present invention;

[0027] Fig.10 This is a schematic diagram of the overall structure of the semicircular opening and closing door of the present invention;

[0028] Fig.11 It is a schematic diagram of the internal structure of the transmission screw rod of the present invention.

[0029] In the figure: 1, housing; 11, mounting seat; 111, mounting hole; 112, air inlet filter; 113, air outlet filter; 12, inner frame; 120, cleaning brush; 121, air inlet; 122, fixed round frame; 123, rotating motor; 124, rotating shaft; 125, meshing gear; 126, rotating disc; 127, internal gear; 128, auxiliary ball; 129, axial flow fan blade; 13, top cover; 130, limit rod; 131, servo motor; 132, straight shaft; 133, rotating gear; 14, rotating disc; 141, rotating ball; 142, internal gear; 15, sliding rack; 151, closing plate; 1 52. Sealing block; 16. Rotating motor; 161. Rotating shaft; 162. Worm; 163. Active bevel gear; 17. Bottom round frame; 171. Inner bevel gear; 172. Ball; 18. Long shaft; 181. Worm gear; 182. Transmission screw; 183. Sliding base; 184. Limit block; 185. Radar body; 19. Limit shaft; 191. Active bevel gear; 192. Limit disc; 20. Follow-up shaft; 201. Rotating screw; 202. Follow-up bevel gear; 203. Limit sliding block; 204. Folding cover cloth; 21. Semicircular opening and closing door; 211. Top block; 212. Connecting shaft; 213. Torsion spring. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figures 1 to 11As shown, this embodiment proposes a protection device for protecting a laser radar and extending the service life of the laser radar, including a housing 1, a rotating motor 16 is installed inside the housing 1, and the output end of the rotating motor 16 is connected to a coaxially arranged rotating shaft 161 through a coupling, and a worm 162 and an active bevel gear 163 are fixedly sleeved on the outer circumference of the rotating shaft 161, respectively, and a bottom circular frame 17 is rotatably installed inside the housing 1, and an inner ring bevel gear 171 is fixedly connected to the inner wall of the bottom circular frame 17, and the active bevel gear 163 and the inner ring bevel gear 171 are fixedly connected. 1 is meshed, the top of the bottom round frame 17 is fixedly connected to the inner frame 12 by screws, the inner wall of the inner frame 12 is fixedly connected to the cleaning brush 120, the inner part of the housing 1 is rotatably mounted with a long shaft 18, the outer circumference of the long shaft 18 is fixedly sleeved with a worm gear 181, the top of the long shaft 18 is fixedly connected with a transmission screw 182, the outer circumference of the transmission screw 182 is movably sleeved with a sliding base 183, the outer circumference of the sliding base 183 is fixedly connected with four symmetrically arranged limit blocks 184, the top of the sliding base 183 is installed with a radar body The radar body 185 is provided with a limit shaft 19 for internal sliding assembly of the long shaft 18. The outer circumference of the limit shaft 19 is respectively fixedly sleeved with an active bevel gear 191 and a limit disc 192. The radar body 185 is internally rotatably installed with four follower shafts 20 evenly distributed on the circumference. One end of the follower shaft 20 is fixedly connected with a rotating screw 201. The outer circumference of the rotating screw 201 is fixedly sleeved with a follower bevel gear 202. The four follower bevel gears 202 are all meshed with the active bevel gear 191. The outer circumference of the rotating screw 201 is movably sleeved with a limit sliding block. 203, one side of each two limit sliding blocks 203 is commonly connected with a folding cover cloth 204. Through the arrangement of the rotating motor 16, the folding cover cloth 204 and other structures, when the radar body 185 needs to be used, the rotating motor 16 is turned on, and the rotating motor 16 makes the radar body 185 extend out of the shell 1 for use. At the same time, the limit sliding seat drives the folding cover cloth 204 to unfold to provide sunshade and rain protection. While reducing the impact of rain, leaves and other falling objects on the radar accuracy, the radar body 185 is protected from the sun and rain, thereby increasing the service life of the equipment.

[0033] like Figures 1 to 10 As shown, four semicircular opening and closing doors 21 evenly distributed around the circumference are rotatably installed on the top of the radar body 185, a top block 211 is fixedly connected to the inner wall of the semicircular opening and closing door 21, both sides of the semicircular opening and closing door 21 are fixedly connected to a connecting shaft 212, the connecting shaft 212 is rotatably installed inside the radar body 185, and a torsion spring 213 is arranged on the connecting shaft 212.

[0034] like Figure 1-2 As shown, four mounting seats 11 with evenly distributed circular axes are fixedly connected to the bottom of the housing 1 , and two symmetrically arranged mounting holes 111 are provided on the mounting seats 11 .

[0035] In this embodiment, when the device needs to be used, the rotating motor 16 is turned on, and the rotating motor 16 rotates to rotate the rotating shaft 161. When the rotating shaft 161 rotates, the worm 162 and the active bevel gear 163 are driven to rotate. The active bevel gear 163 drives the bottom circular frame 17 to rotate by meshing with the inner bevel gear 171. When the bottom circular frame 17 rotates, the ball 172 assists in its rotation. The rotation of the bottom circular frame 17 causes the inner frame 12 to rotate. The rotation of the inner frame 12 causes the cleaning brush 120 to rotate and clean when the radar body 185 is extended and retracted, thereby improving its cleanliness and reducing the corrosion effect of the radar body 185 caused by dirt thereon. When the worm 162 rotates, it drives the worm wheel 181 to rotate, and the rotation of the worm wheel 181 causes the transmission screw 182 to rotate. The rotation of the transmission screw 182 causes the sliding base 183 to slide. When the sliding base 183 slides, the limit block 184 and the limit rod 130 limit its sliding position, and the sliding base 183 moves to During the upward sliding, the active bevel gear 191 is driven to rotate due to the limit shaft 19, and the upper and lower positions of the active bevel gear 191 are limited by the limit disc 192. When the active bevel gear 191 rotates, the four follower shafts 20 are driven to rotate by meshing with the four follower bevel gears 202. The rotation of the follower shaft 20 drives the rotating screw 201 to rotate. The rotation of the rotating screw 201 drives the limit sliding block 203 to slide toward the outside of the radar body 185. The limit sliding block 203 slides When it reaches the outermost distance, the folding cover cloth 204 is fully opened to shade the top of the radar body 185 from the sun and rain. When the limit sliding block 203 slides out, the limit sliding block 203 pushes the top block 211 to open the semicircular opening and closing door 21. When it is retracted after use, the semicircular opening and closing door 21 is closed by the setting of the connecting shaft 212 and the torsion spring 213. While reducing the impact of fallen objects such as rainwater and leaves on the radar accuracy, the radar body 185 is protected from the sun and rain, thereby increasing the service life of the equipment.

[0036] Example 2

[0037] like Figure 1 to Figure 4As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes that an air inlet 121 is provided on the outer circumference of the inner frame 12, an air inlet filter 112 is provided on the outer circumference of the shell 1, and an air outlet filter 113 is provided at the bottom of the shell 1. A fixed circular frame 122 is fixedly sleeved on the outer circumference of the inner frame 12, and a rotating motor 123 is installed at the bottom of the fixed circular frame 122. The output end of the rotating motor 123 is connected to a coaxially arranged rotating shaft 124 through a coupling, and a meshing gear 125 is fixedly sleeved on the outer circumference of the rotating shaft 124. The internal rotating shaft 124 of the fixed circular frame 122 is provided with a meshing gear 125. A rotating disk 126 is dynamically installed, and an internal gear 127 is fixedly connected to the inner wall of the rotating disk 126. The meshing gear 125 meshes with the internal gear 127. An axial flow fan blade 129 is fixedly sleeved on the outer circumference of the rotating disk 126. By setting the rotating motor 123, the axial flow fan blade 129 and other structures, when the radar is in use, the rotating motor 123 is turned on, and the rotation of the rotating motor 123 causes the axial flow fan blade 129 to rotate. The axial flow fan blade 129 compresses air and blows it into the interior of the inner frame 12, so as to cool and ventilate the bottom of the radar body 185 and the interior of the entire device.

[0038] In this embodiment, when the radar is in use, the rotating motor 123 on the fixed circular frame 122 is turned on, and the rotation of the rotating motor 123 causes the rotating shaft 124 to rotate, and the rotation of the rotating shaft 124 drives the meshing gear 125 to rotate, and the rotation of the meshing gear 125 drives the internal gear 127 to rotate, and the rotation of the internal gear 127 drives the rotating disk 126 to rotate, and when the rotating disk 126 rotates, there is an auxiliary ball 128 to assist its rotation, and the rotation of the rotating disk 126 causes the axial flow fan blade 129 to rotate, and the housing 1 The configuration is a cone that is thin at the top and thick at the bottom. When the axial flow fan blades 129 rotate, the more air in the lower part of the shell 1 is compressed, so that the air flow speed is increased, and the air enters from the air inlet filter 112. The air inlet filter 112 can effectively prevent dust from entering the interior of the device when in use. The air entering from the air inlet filter 112 passes through the axial flow fan blades 129 and enters the inner frame 12 from the air inlet 121, and is then sent out from the air outlet filter 113 at the bottom of the shell 1, so as to cool and ventilate the bottom of the radar body 185 and the interior of the entire device.

[0039] Example 3

[0040] like Figure 1 to Figure 7As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes that a top cover 13 is fixedly connected to the top of the housing 1, a servo motor 131 is installed inside the top cover 13, eight straight shafts 132 evenly distributed around the circumference are rotatably installed inside the top cover 13, one of the straight shafts 132 is connected to the output end of the servo motor 131 through a coupling, a rotating gear 133 is fixedly sleeved on the outer circumference of the straight shaft 132, a rotating disk 14 is rotatably installed inside the top cover 13, an internal gear 142 is fixedly connected to the inner wall of the rotating disk 14, and the eight rotating gears 133 are all connected to the inner wall of the rotating disk 14. The internal gear 142 is meshed with each other, and the internal sliding assembly of the top cover 13 is equipped with eight circumferentially evenly distributed sliding racks 15, which are meshed with the rotating gear 133. The top of the sliding rack 15 is fixedly connected with a closing plate 151. Through the arrangement of the servo motor 131, the closing plate 151 and other structures, when the radar body 185 is extended and retracted into the equipment, the servo motor 131 starts to rotate, so that the closing plate 151 is opened and closed. A sealing block 152 is arranged on the closing plate 151, and the top is sealed and preserved when the radar body 185 is retracted, thereby improving its protection level.

[0041] like Figures 1 to 8 As shown, eight symmetrically arranged limiting rods 130 are fixedly connected to the bottom of the top cover 13 , and every two limiting rods 130 pass through the interior of a limiting block 184 .

[0042] like Figure 1 to Figure 7 As shown, a sealing block 152 is disposed on one side and the top of the closing plate 151 , and a clamping groove matched with the sealing block 152 is disposed on the other side of the closing plate 151 , and the sealing block 152 is clamped inside the clamping groove.

[0043] like Figures 1 to 8 As shown, a plurality of round balls 172 evenly distributed around the circumference are installed for internal rotation of the bottom circular frame 17, a plurality of auxiliary balls 128 evenly distributed around the circumference are installed for internal rotation of the rotating disk 126, and a plurality of rotating balls 141 evenly distributed around the circumference are installed for internal rotation of the rotating disk 14. The round balls 172, the auxiliary balls 128 and the rotating balls 141 respectively assist the rotation of the bottom circular frame 17, the rotating disk 126 and the rotating disk 14.

[0044] In this embodiment, before the radar body 185 needs to be extended for use, the servo motor 131 is first turned on. The start of the servo motor 131 causes one of the straight shafts 132 to rotate, and this straight shaft 132 drives the rotating gear 133 to rotate. This rotating tooth drives the rotating disk 14 to rotate by engaging with the internal gear 142. When the rotating disk 14 rotates, it is assisted by the auxiliary ball 128 to rotate. When the rotating disk 126 rotates, the internal gear 142 is engaged with the remaining rotating gears 133 to drive the remaining rotating gears 133 to rotate, so that all the rotating gears 133 rotate synchronously, and the rotation of the rotating gear 133 causes the sliding rack 15 to slide, and the sliding of the sliding rack 15 causes the closing plate 151 to unfold, thereby extending the radar body 185. A sealing block 152 is provided on the closing plate 151, and the top of the radar body 185 is sealed and preserved when it is retracted, thereby improving its protection level.

[0045] 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 protective device for protecting a laser radar and extending its service life, comprising a housing (1), characterized in that: A rotating motor (16) is installed inside the housing (1); the output end of the rotating motor (16) is connected to a coaxially arranged rotating shaft (161) via a coupling; a worm (162) and an active bevel gear (163) are respectively fixedly sleeved on the outer circumference of the rotating shaft (161); a bottom circular frame (17) is rotatably installed inside the housing (1); an inner ring bevel gear (171) is fixedly connected to the inner wall of the bottom circular frame (17); the active bevel gear (163) and the inner ring bevel gear (171) are fixedly connected to the inner wall of the bottom circular frame (17); The inner bevel gear (171) is meshed with the inner ring bevel gear (171), the top of the bottom circular frame (17) is fixedly connected to the inner frame (12) by screws, the inner wall of the inner frame (12) is fixedly connected to a cleaning brush (120), a long shaft (18) is rotatably mounted inside the shell (1), a worm gear (181) is fixedly sleeved on the outer circumference of the long shaft (18), a transmission screw (182) is fixedly connected to the top of the long shaft (18), and a movable sleeve is provided on the outer circumference of the transmission screw (182). A sliding base (183) is provided, and four symmetrically arranged limit blocks (184) are fixedly connected to the outer circumference of the sliding base (183); a radar body (185) is installed on the top of the sliding base (183); a limit shaft (19) is slidably assembled inside the long shaft (18); an active bevel gear (191) and a limit disc (192) are fixedly sleeved on the outer circumference of the limit shaft (19); and four symmetrically arranged limit blocks (184) are rotatably installed inside the radar body (185). A follower shaft (20) of the cloth, one end of the follower shaft (20) is fixedly connected to a rotating screw (201), a follower bevel gear (202) is fixedly sleeved on the outer circumference of the rotating screw (201), four follower bevel gears (202) are all meshed with the active bevel gear (191), a limit sliding block (203) is movably sleeved on the outer circumference of the rotating screw (201), and one side of every two limit sliding blocks (203) is commonly connected to a folding cover cloth (204).

2. The protective device for protecting a laser radar and extending its service life according to claim 1, characterized in that: Four semicircular opening and closing doors (21) evenly distributed around the circumference are rotatably mounted on the top of the radar body (185); a top block (211) is fixedly connected to the inner wall of the semicircular opening and closing door (21); connecting shafts (212) are fixedly connected to both sides of the semicircular opening and closing door (21); the connecting shafts (212) are rotatably mounted inside the radar body (185); and a torsion spring (213) is arranged on the connecting shafts (212).

3. The protective device for protecting a laser radar and extending its service life according to claim 1, characterized in that: An air inlet (121) is arranged on the outer circumference of the inner frame (12), an air inlet filter (112) is arranged on the outer circumference of the shell (1), an air outlet filter (113) is arranged at the bottom of the shell (1), a fixed circular frame (122) is fixedly sleeved on the outer circumference of the inner frame (12), a rotating motor (123) is installed at the bottom of the fixed circular frame (122), and the output end of the rotating motor (123) is connected to a coaxially arranged A rotating shaft (124) is disposed on the outer circumference of the rotating shaft (124), a meshing gear (125) is fixedly sleeved on the outer circumference of the rotating shaft (124), a rotating disc (126) is rotatably mounted inside the fixed circular frame (122), an internal gear (127) is fixedly connected to the inner wall of the rotating disc (126), the meshing gear (125) meshes with the internal gear (127), and an axial flow fan blade (129) is fixedly sleeved on the outer circumference of the rotating disc (126).

4. The protection device for protecting a laser radar and extending its service life according to claim 3, characterized in that: The top of the shell (1) is fixedly connected to a top cover (13), a servo motor (131) is installed inside the top cover (13), eight circumferentially evenly distributed straight shafts (132) are rotatably installed inside the top cover (13), one of the straight shafts (132) is connected to the output end of the servo motor (131) through a coupling, a rotating gear (133) is fixedly sleeved on the outer circumference of the straight shaft (132), a rotating disk (14) is rotatably installed inside the top cover (13), an internal gear (142) is fixedly connected to the inner wall of the rotating disk (14), and the eight rotating gears (133) are all meshed with the internal gear (142), and eight circumferentially evenly distributed sliding racks (15) are slidably installed inside the top cover (13), the sliding racks (15) are meshed with the rotating gears (133), and a closing plate (151) is fixedly connected to the top of the sliding racks (15).

5. The protection device for protecting a laser radar and extending its service life according to claim 1, characterized in that: The bottom of the housing (1) is fixedly connected to four mounting seats (11) with evenly distributed circular axes, and the mounting seats (11) are provided with two symmetrically arranged mounting holes (111).

6. The protection device for protecting a laser radar and extending its service life according to claim 4, characterized in that: Eight symmetrically arranged limiting rods (130) are fixedly connected to the bottom of the top cover (13), and every two limiting rods (130) pass through the interior of one limiting block (184).

7. The protection device for protecting a laser radar and extending its service life according to claim 4, characterized in that: A sealing block (152) is provided on one side and the top of the closing plate (151), and a clamping groove matched with the sealing block (152) is provided on the other side of the closing plate (151), and the sealing block (152) is clamped inside the clamping groove.

8. The protection device for protecting a laser radar and extending its service life according to claim 4, characterized in that: A plurality of round balls (172) evenly distributed around the circumference are rotatably mounted inside the bottom circular frame (17), a plurality of auxiliary balls (128) evenly distributed around the circumference are rotatably mounted inside the rotating disc (126), and a plurality of rotating balls (141) evenly distributed around the circumference are rotatably mounted inside the rotating disc (14). The round balls (172), the auxiliary balls (128) and the rotating balls (141) respectively assist the rotation of the bottom circular frame (17), the rotating disc (126) and the rotating disc (14).

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