A height limit detection radar for a mobile lifting platform

Abstract

The present invention relates to the technical field of height-limiting detection radars, and specifically to a height-limiting detection radar for a mobile lifting platform, which includes a mounting bracket, a detection radar main body, and a protection structure. The mounting bracket is arched, and both ends of the mounting bracket are fixed to the guardrail above the mobile lifting platform through positioning bolts. An installation plate is integrally formed at the middle position of the mounting bracket, and installation holes are provided on the installation plate. By setting the protection structure to be composed of a fastening seat and a protection seat, an annular air cavity and an air supply hole are provided on the fastening seat, and an air clearance groove, a main air duct, and a dust removal air duct are provided on the protection seat. Thus, by supplying air through an air pump, the air flow passes through the annular air cavity, the air supply hole, the air clearance groove, and the main air duct in sequence, and is blown out from the dust removal air duct, so as to form self-cleaning on the lens surface of the detection radar main body, thereby ensuring the detection accuracy of the detection radar main body, and effectively ensuring the safety of the mobile lifting platform during operation.

Description

Technical Field

[0001] The present invention relates to the technical field related to height-limiting detection radars, and specifically to a height-limiting detection radar for a mobile lifting platform. Background Art

[0002] An infrared lidar is a radar system that emits laser beams to detect the position, speed, and other characteristic quantities of a target. Its working principle is to emit a detection signal (ultrasonic wave or laser beam) to the target, and then compare the received signal (target echo) reflected from the target with the transmitted signal. After appropriate processing, relevant information about the target can be obtained. An ultrasonic radar is based on the emission and reception of sound waves. High-frequency ultrasonic pulses propagate in the air, reflect back after encountering an obstacle, and the distance of the target object is calculated based on the time difference of the round-trip of the sound wave;

[0003] The existing Chinese patent document with the publication number CN218727964U discloses a railway tunnel radar detection platform. The solution includes a detection platform body, and the detection platform body includes a support plate and a tunnel. A lifting mechanism is installed at the bottom of the support plate, one end of the lifting mechanism is fixed with a base, a moving mechanism is installed at the bottom of the base, movable components are respectively installed at both ends of the support plate, universal wheels are installed on the movable components, a fixed seat is fixed on the top of the support plate, a power mechanism is installed on the fixed seat, and a rotating disk is installed on the power mechanism;

[0004] However, in the above solution, no special protection structure is provided for the signal transmitting end and receiving end of the radar. The working environment of this device belongs to outdoor or indoor high-dust environments. When dust adheres to the signal transmitting end and receiving end, it will affect the normal transmission and reception of ultrasonic and laser signals, thereby interfering with the detection of the lidar and affecting the detection accuracy. Therefore, the present invention proposes a height-limiting detection radar for a mobile lifting platform to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a height-limiting detection radar for a mobile lifting platform to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A height-limiting detection radar for a mobile lifting platform, comprising:

[0007] A mounting bracket, the mounting bracket is arched, and both ends of the mounting bracket are fixed on the guardrail above the mobile lifting platform through positioning bolts. An installation plate is integrally formed at the middle position of the mounting bracket. Installation holes are provided on the installation plate, and through holes are provided at positions on the mounting bracket corresponding to the installation holes;

[0008] Detection radar main body, a laser emission module and a laser reception module are arranged in the lens on the detection radar main body, the laser emission module and the laser reception module are both electrically connected to a signal processing module in the detection radar main body, and the signal processing module is electrically connected to a control module on a mobile lifting platform through a signal line;

[0009] Protection structure, the protection structure includes a fastening seat and a protection seat, a threaded seat is integrally formed on the outer side wall of the lens, the fastening seat is threadedly connected to the threaded seat, and when the fastening seat is actually tightened, the detection radar main body is positioned on the mounting plate.

[0010] Preferably, an annular air cavity is formed in the inner cavity side wall of the fastening seat, air supply holes are formed in the inner side wall of the annular air cavity, an air pipe connector is arranged on the outer side wall of the annular air cavity, the air pipe connector is connected to an air outlet port of an air pump on the mobile lifting platform through an air pipe, a dust filter is connected to the air inlet port of the air pump, the protection seat is installed in the inner cavity of the threaded seat, an avoidance groove is formed in the outer side wall of the protection seat, the avoidance groove is arranged corresponding to the air supply holes, a main air duct is formed in the side wall of the avoidance groove, the main air ducts are arranged in a circle around the avoidance groove, and the ends of the main air ducts are all communicated with dust removal air ducts, and the ends of the dust removal air ducts all face the end face of the lens.

[0011] Preferably, a first-stage rotation groove and a second-stage rotation groove are formed in the inner cavity side wall of the fastening seat, a first-stage rotation ring and a second-stage rotation ring are integrally formed on the outer side wall of the protection seat, the first-stage rotation ring and the second-stage rotation ring are respectively arranged in a matching manner with the first-stage rotation groove and the second-stage rotation groove, and when the protection seat is actually installed, the first-stage rotation ring and the second-stage rotation ring are respectively movably arranged in the first-stage rotation groove and the second-stage rotation groove, a force-bearing tooth body is integrally formed on the side wall of the avoidance groove, and the force-bearing tooth body is arranged corresponding to the air supply holes.

[0012] Preferably, the force-bearing tooth bodies and the air supply holes are arranged in a circle equally in circumference, and the cross section of the force-bearing tooth body is an obtuse triangle, the end of the air supply hole is inclined towards the force-bearing tooth body, and when the air supply hole blows out air, the air blown out by the air supply hole applies a force to the force-bearing tooth body and drives the protection seat to rotate along the fastening seat, and the set number of the force-bearing tooth bodies is 1.5 times the set number of the air supply holes.

[0013] Preferably, there are gaps between the first-stage rotation ring and the second-stage rotation ring and the first-stage rotation groove and the second-stage rotation groove, and when the first-stage rotation ring and the second-stage rotation ring are arranged in the first-stage rotation groove and the second-stage rotation groove, the fastening seat and the protection seat do not contact each other.

[0014] Preferably, the end of the dust removal air duct is inclined, and the inclination angles of the ends of different dust removal air ducts are set to increase successively. When the protective seat rotates, the gas blown out from the ends of all dust removal air ducts completely cleans the surface of the lens.

[0015] Preferably, a primary air distribution groove is formed at the bottom of the primary rotation groove, and a secondary air distribution groove is formed at the bottom of the secondary rotation groove. Both the primary air distribution groove and the secondary air distribution groove are annularly arranged. The primary air distribution groove is communicated with the annular air cavity through a primary connection groove, and the secondary air distribution groove is communicated with the annular air cavity through a secondary connection groove. The primary connection groove and the secondary connection groove are both arranged in a circle around the annular air cavity.

[0016] Preferably, a blowing air duct is formed at the end of the main air duct.

[0017] Preferably, a dust inlet is formed on the inner side wall of the fastening seat, and a dust accumulation cavity is formed at the root of the dust inlet. Both the dust inlet and the dust accumulation cavity are annularly arranged. A cleaning port is formed at the bottom of the dust accumulation cavity, and a sealing plate groove is formed on the bottom surface of the fastening seat. A sealing plate is snap-fitted in the sealing plate groove. The lower port of the dust inlet is flush with the end surface of the threaded seat.

[0018] Preferably, the cross-sections of the dust inlet and the dust accumulation cavity are both right-angled triangles. An anti-backflow plate is integrally formed on the side wall of the dust accumulation cavity. The anti-backflow plate is annularly arranged and is arranged in pairs. The cross-section of the same pair of anti-backflow plates is in an inverted V shape.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. By providing a mobile lifting platform height limit detection radar composed of a mounting bracket, a detection radar main body, and a protective structure, and setting the protective structure to be composed of a fastening seat and a protective seat, an annular air cavity and air supply holes are formed on the fastening seat, and an avoidance groove, a main air duct, and a dust removal air duct are formed on the protective seat. Thus, through the air supply of an air pump, the air flow sequentially passes through the annular air cavity, the air supply holes, the avoidance groove, and the main air duct, and is blown out from the dust removal air duct, so as to form self-cleaning on the lens surface of the detection radar main body, thereby ensuring the detection accuracy of the detection radar main body and effectively ensuring the safety of the mobile lifting platform during operation;

[0021] 2. An upper rotating groove and a lower rotating groove are formed in the fastening seat, an upper rotating ring and a lower rotating ring are arranged on the protective seat, a circle of stress teeth is arranged on the side wall of the clearance groove, and the end of the air supply hole is inclined towards the stress teeth, so that the gas blown out of the air supply hole exerts a force on the stress teeth, enabling the protective seat to rotate automatically, and ensuring that the inclination angle of the end of the dust removal air duct increases successively, so as to ensure that the gas blown out of the dust removal air duct completely cleans the surface of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present invention;

[0023] Figure 2 is a sectional view of the present invention along the main air duct;

[0024] Figure 3 is Figure 2 an enlarged schematic view of the structure at A in

[0025] Figure 4 is Figure 3 an enlarged schematic view of the structure at B in

[0026] Figure 5 is Figure 3 an enlarged schematic view of the structure at C in

[0027] Figure 6 is a half-sectional view of the fastening seat of the present invention;

[0028] Figure 7 is Figure 6 an enlarged schematic view of the structure at D in

[0029] Figure 8 is Figure 6 an enlarged schematic view of the structure at E in

[0030] Figure 9 is a schematic structural diagram of the protective seat of the present invention;

[0031] Figure 10 is Figure 9 an enlarged schematic view of the structure at F in

[0032] Figure 11 is a schematic structural diagram of the fastening seat of the present invention;

[0033] Figure 12 is Figure 11 an enlarged schematic view of the structure at G in

[0034] Figure 13 is a schematic diagram of the actual use effect of the present invention;

[0035] Figure 14 is Figure 13Schematic enlarged view of the structure at H in the middle.

[0036] In the figure: mounting bracket 1, detection radar main body 2, protective structure 3, mobile lifting platform 4, guardrail 5, mounting plate 6, through hole 7, lens 8, threaded seat 9, fastening seat 10, protective seat 11, signal line 12, annular air cavity 13, air pipe 14, air supply hole 15, clearance groove 16, force-bearing tooth body 17, main air duct 18, blowing air duct 19, first-level rotation groove 20, second-level rotation groove 21, first-level connection groove 22, second-level connection groove 23, first-level rotation ring 24, second-level rotation ring 25, first-level air distribution groove 26, second-level air distribution groove 27, dust removal air duct 28, dust inlet 29, dust accumulation cavity 30, cleaning port 31, sealing plate groove 32, sealing plate 33, anti-backflow plate 34. Specific implementation mode

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to Figures 1 - 14 , the present invention provides embodiments of the following three preferred solutions:

[0039] Embodiment 1: A height-limiting detection radar for a mobile lifting platform, including a mounting bracket 1, a detection radar main body 2 and a protective structure 3. The mounting bracket 1 is arched, and both ends of the mounting bracket 1 are fixed on the guardrail 5 above the mobile lifting platform 4 through positioning bolts. An integral mounting plate 6 is formed at the middle position of the mounting bracket 1. Mounting holes are provided on the mounting plate 6, and through holes 7 are provided at positions corresponding to the mounting holes on the mounting bracket 1. A laser emission module and a laser reception module are arranged in the lens 8 of the detection radar main body 2. Both the laser emission module and the laser reception module are electrically connected to the signal processing module in the detection radar main body 2, and the signal processing module is electrically connected to the control module on the mobile lifting platform 4 through a signal line 12. The protective structure 3 includes a fastening seat 10 and a protective seat 11. A threaded seat 9 is integrally formed on the outer side wall of the lens 8. The fastening seat 10 is threadedly connected to the threaded seat 9. When the fastening seat 10 is actually tightened, the detection radar main body 2 is positioned on the mounting plate 6.

[0040] The fastening base 10 is provided with an annular air cavity 13. An air supply hole 15 is opened on the inner side wall of the annular air cavity 13, and an air pipe connector is arranged on the outer side wall of the annular air cavity 13. The air pipe connector is connected to the air outlet port of an air pump on the mobile lifting platform 4 through an air pipe 14. The air inlet port of the air pump is connected with a dust filter. The protective seat 11 is installed in the inner cavity of the threaded seat 9. An avoidance groove 16 is opened on the outer side wall of the protective seat 11. The avoidance groove 16 is arranged corresponding to the air supply hole 15. A main air duct 18 is opened on the side wall of the avoidance groove 16. The main air duct 18 is arranged in a circle around the avoidance groove 16, and the ends of the main air ducts 18 are all communicated with dust removal air ducts 28. The ends of the dust removal air ducts 28 are all arranged towards the end face of the lens 8. By providing a mobile lifting platform height limit detection radar composed of an installation bracket 1, a detection radar main body 2 and a protective structure 3, and by setting the protective structure 3 to be composed of a fastening base 10 and a protective seat 11, and opening an annular air cavity 13 and an air supply hole 15 on the fastening base 10, and opening an avoidance groove 16, a main air duct 18 and a dust removal air duct 28 on the protective seat 11, the air pump supplies air, so that the air flow passes through the annular air cavity 13, the air supply hole 15, the avoidance groove 16, the main air duct 18 in sequence, and is blown out from the dust removal air duct 28, so as to form self-cleaning on the surface of the lens 8 of the detection radar main body 2, so as to ensure the detection accuracy of the detection radar main body 2, and effectively ensure the safety of the mobile lifting platform 4 during operation.

[0041] Embodiment 2: On the basis of Embodiment 1, a first-level rotation groove 20 and a second-level rotation groove 21 are opened on the inner side wall of the fastening base 10. A first-level rotation ring 24 and a second-level rotation ring 25 are integrally formed on the outer side wall of the protective seat 11. The first-level rotation ring 24 and the second-level rotation ring 25 are respectively arranged in a matching manner with the first-level rotation groove 20 and the second-level rotation groove 21. When the protective seat 11 is actually installed, the first-level rotation ring 24 and the second-level rotation ring 25 are respectively movably arranged in the first-level rotation groove 20 and the second-level rotation groove 21. A force-bearing tooth body 17 is integrally formed on the side wall of the avoidance groove 16. The force-bearing tooth body 17 is arranged corresponding to the air supply hole 15.

[0042] The force-bearing tooth bodies 17 and the air supply holes 15 are arranged in a circle at equal circumferences, and the cross section of the force-bearing tooth body 17 is in an obtuse triangle shape. The end of the air supply hole 15 is inclined towards the force-bearing tooth body 17. When the air supply hole 15 blows out air, the air blown out by the air supply hole 15 exerts a force on the force-bearing tooth body 17 and drives the protective seat 11 to rotate along the fastening base 10. The set number of the force-bearing tooth bodies 17 is 1.5 times the set number of the air supply holes 15, which can ensure that a part of the force-bearing tooth bodies 17 are always in a stable force-bearing state.

[0043] There are gaps between the first - level rotating ring 24, the second - level rotating ring 25 and the first - level rotating groove 20, the second - level rotating groove 21. When the first - level rotating ring 24 and the second - level rotating ring 25 are arranged in the first - level rotating groove 20 and the second - level rotating groove 21, the fastening seat 10 and the protective seat 11 do not contact each other, which can reduce the friction force and improve the rotational flexibility of the protective seat 11.

[0044] The end of the dust - removing air duct 28 is inclined, and the inclination angles of the ends of different dust - removing air ducts 28 are set to increase in sequence. When the protective seat 11 rotates, the gas blown out from the ends of all the dust - removing air ducts 28 completely cleans the surface of the lens 8. An first - level rotating groove 20 and a second - level rotating groove 21 are opened on the fastening seat 10, an first - level rotating ring 24 and a second - level rotating ring 25 are arranged on the protective seat 11, a circle of force - receiving tooth bodies 17 are arranged on the side wall of the clearance groove 16, and the end of the air - supply hole 15 is inclined towards the force - receiving tooth bodies 17, so that the gas blown out from the air - supply hole 15 exerts a force on the force - receiving tooth bodies 17, enabling the protective seat 11 to rotate automatically, and ensuring that the inclination angles of the ends of the dust - removing air ducts 28 increase in sequence, thereby ensuring that the gas blown out from the dust - removing air ducts 28 completely cleans the surface of the lens 8.

[0045] An first - level air - distributing groove 26 is opened at the bottom of the first - level rotating groove 20, and a second - level air - distributing groove 27 is opened at the bottom of the second - level rotating groove 21. Both the first - level air - distributing groove 26 and the second - level air - distributing groove 27 are annularly arranged. The first - level air - distributing groove 26 is communicated with the annular air cavity 13 through a first - level connecting groove 22, and the second - level air - distributing groove 27 is communicated with the annular air cavity 13 through a second - level connecting groove 23. The first - level connecting groove 22 and the second - level connecting groove 23 are both arranged in a circle around the annular air cavity 13 at equal circumferences. The settings of the first - level air - distributing groove 26 and the second - level air - distributing groove 27 can better distribute the gas into the gaps between the first - level rotating ring 24, the second - level rotating ring 25 and the first - level rotating groove 20, the second - level rotating groove 21, thus forming an air lubrication effect, and further improving the relative movement flexibility between the protective seat 11 and the fastening seat 10.

[0046] A blowing air duct 19 is opened at the end of the main air duct 18, and air is blown out towards the outside through the blowing air duct 19 to form an air wall to reduce the entry of dust to the position of the lens 8.

[0047] Embodiment 3: On the basis of Embodiment 2, a dust inlet 29 is formed on the inner side wall of the fastening seat 10, and a dust accumulation cavity 30 is formed at the root of the dust inlet 29. Both the dust inlet 29 and the dust accumulation cavity 30 are annularly arranged. A cleaning port 31 is formed at the bottom of the dust accumulation cavity 30, and a sealing plate groove 32 is formed on the bottom surface of the fastening seat 10. A sealing plate 33 is snap-fitted in the sealing plate groove 32. The lower port of the dust inlet 29 is flush with the end surface of the threaded seat 9. Through the settings of the dust inlet 29 and the dust accumulation cavity 30, it is convenient to blow the dust into the dust accumulation cavity 30 for collection, so as to avoid secondary pollution of the dust, and it is convenient for the staff to centrally clean the dust.

[0048] The cross-sections of the dust inlet 29 and the dust accumulation cavity 30 are both right-angled triangles. An anti-backflow plate 34 is integrally formed on the side wall of the dust accumulation cavity 30. The anti-backflow plate 34 is annularly arranged, and the anti-backflow plate 34 is arranged in pairs. The cross-section of the same pair of anti-backflow plates 34 is arranged in an inverted V shape. The setting of the anti-backflow plate 34 can effectively prevent the dust from flowing back, thus effectively ensuring the protection and cleaning effect of the protection structure 3.

[0049] Although the above describes the illustrative specific embodiments of the present application to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the appended claims, all applications and creations using the concept of the present application are within the scope of protection.

Claims

1. A height limit detection radar for a mobile lifting platform, characterized in that: Including: An installation bracket (1), the installation bracket (1) is arched, and both ends of the installation bracket (1) are fixed on the guardrail (5) above the mobile lifting platform (4) through positioning bolts, and a mounting plate (6) is integrally formed at the middle position of the installation bracket (1). Mounting holes are provided on the mounting plate (6), and through holes (7) are provided at positions on the installation bracket (1) corresponding to the mounting holes; A detection radar main body (2), in which a laser emission module and a laser reception module are arranged in a lens (8) of the detection radar main body (2). Both the laser emission module and the laser reception module are electrically connected to a signal processing module in the detection radar main body (2), and the signal processing module is electrically connected to a control module on the mobile lifting platform (4) through a signal line (12); A protection structure (3), the protection structure (3) includes a fastening seat (10) and a protection seat (11). A threaded seat (9) is integrally formed on the outer side wall of the lens (8). The fastening seat (10) is threadedly connected to the threaded seat (9). When the fastening seat (10) is actually tightened, the detection radar main body (2) is positioned on the mounting plate (6); An annular air cavity (13) is provided on the inner side wall of the fastening seat (10). Air supply holes (15) are provided on the inner side wall of the annular air cavity (13), and an air pipe connector is provided on the outer side wall of the annular air cavity (13). The air pipe connector is connected to an air outlet port of an air pump on the mobile lifting platform (4) through an air pipe (14). The air inlet port of the air pump is connected with a dust filter. The protection seat (11) is installed in the inner cavity of the threaded seat (9). An avoidance groove (16) is provided on the outer side wall of the protection seat (11). The avoidance groove (16) is arranged corresponding to the air supply holes (15). A main air duct (18) is provided on the side wall of the avoidance groove (16). The main air duct (18) is arranged in a circle around the avoidance groove (16) at equal circumferences, and the ends of the main air ducts (18) are all communicated with dust removal air ducts (28). The ends of the dust removal air ducts (28) are all arranged towards the end face of the lens (8); A first-stage rotation groove (20) and a second-stage rotation groove (21) are provided on the inner side wall of the inner cavity of the fastening seat (10). A first-stage rotation ring (24) and a second-stage rotation ring (25) are integrally formed on the outer side wall of the protection seat (11). The first-stage rotation ring (24) and the second-stage rotation ring (25) are respectively arranged in a matching manner with the first-stage rotation groove (20) and the second-stage rotation groove (21). When the protection seat (11) is actually installed, the first-stage rotation ring (24) and the second-stage rotation ring (25) are respectively movably arranged in the first-stage rotation groove (20) and the second-stage rotation groove (21). A force-bearing tooth body (17) is integrally formed on the side wall of the avoidance groove (16). The force-bearing tooth body (17) is arranged in alignment with the air supply holes (15).

2. The height limit detection radar for a mobile lifting platform according to claim 1, wherein: The force-bearing tooth bodies (17) and the air supply holes (15) are arranged in an equal circle. The cross-section of the force-bearing tooth bodies (17) is an obtuse triangle. The end of the air supply hole (15) is inclined towards the force-bearing tooth body (17). When the air supply hole (15) blows out air, the air blown out by the air supply hole (15) exerts a force on the force-bearing tooth body (17) and drives the protective seat (11) to rotate along the fastening seat (10). The number of the force-bearing tooth bodies (17) is 1.5 times the number of the air supply holes (15).

3. The height limit detection radar for a mobile lifting platform according to claim 2, characterized in that: There are gaps between the first-level rotating ring (24), the second-level rotating ring (25) and the first-level rotating groove (20), the second-level rotating groove (21). When the first-level rotating ring (24) and the second-level rotating ring (25) are arranged in the first-level rotating groove (20) and the second-level rotating groove (21), the fastening seat (10) and the protective seat (11) do not contact each other.

4. The height limit detection radar for a mobile lifting platform according to claim 3, characterized in that: The end of the dust removal air duct (28) is inclined, and the inclination angles of the ends of different dust removal air ducts (28) increase in sequence. When the protective seat (11) rotates, the air blown out from the ends of all the dust removal air ducts (28) completely cleans the surface of the lens (8).

5. The height limit detection radar for a mobile lifting platform according to claim 4, wherein: A first-level air distribution groove (26) is opened at the bottom of the first-level rotating groove (20), and a second-level air distribution groove (27) is opened at the bottom of the second-level rotating groove (21). The first-level air distribution groove (26) and the second-level air distribution groove (27) are both annular. The first-level air distribution groove (26) is communicated with the annular air cavity (13) through a first-level connecting groove (22), and the second-level air distribution groove (27) is communicated with the annular air cavity (13) through a second-level connecting groove (23). The first-level connecting groove (22) and the second-level connecting groove (23) are both arranged in an equal circle around the annular air cavity (13).

6. The height limit detection radar for a mobile lifting platform according to claim 5, characterized in that: A blowing air duct (19) is opened at the end of the main air duct (18).

7. A height limit detection radar for a mobile lifting platform according to claim 5, characterized in that: A dust inlet (29) is opened on the inner side wall of the fastening seat (10). A dust accumulation cavity (30) is opened at the root of the dust inlet (29). The dust inlet (29) and the dust accumulation cavity (30) are both annular. A cleaning port (31) is opened at the bottom of the dust accumulation cavity (30). A sealing plate groove (32) is opened on the bottom surface of the fastening seat (10). A sealing plate (33) is snap-fitted and installed in the sealing plate groove (32). The lower side port of the dust inlet (29) is flush with the end face of the threaded seat (9).

8. A height limit detection radar for a mobile lifting platform according to claim 7, characterized in that: The cross-sections of the dust inlet (29) and the dust accumulation cavity (30) are both right-angled triangles. An anti-backflow plate (34) is integrally formed on the side wall of the dust accumulation cavity (30). The anti-backflow plate (34) is annular and is arranged in pairs. The cross-section of the same pair of anti-backflow plates (34) is in an inverted V shape.

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