Road traffic monitoring camera suitable for severe weather

Abstract

The invention relates to the technical field of monitoring cameras, and particularly discloses a road traffic monitoring camera suitable for severe weather, the side surface of the camera is fixedly connected with a lens, the bottom of the camera is fixedly connected with a mounting part, the side surface of a limiting shell is fixedly connected with a fixing plate, and the fixing plate is fixedly connected with a limiting plate. A limiting plate is fixedly connected to the other side of the fixing plate, a flow guide mechanism is fixedly connected to the side, away from the fixing plate, of the limiting shell, a cleaning mechanism is fixedly connected to the inner side of the fixing plate, and blowing mechanisms are fixedly connected to the two sides of an inner cavity of the limiting shell. According to the road traffic monitoring camera suitable for the severe weather, the cleaning mechanism is arranged, water throwing is achieved through centrifugal force instead of traditional contact type wiping, shooting interruption caused by the fact that a cleaning tool shields the lens is avoided, the situation that an anti-fog coating and a hydrophobic coating on the surface of the transparent piece are damaged due to friction can be prevented, and the service life of the transparent piece is prolonged.

Description

Technical Field

[0001] This invention relates to the field of surveillance camera technology, specifically to a road traffic surveillance camera suitable for adverse weather conditions. Background Technology

[0002] As the core sensing terminal of intelligent transportation systems, road traffic monitoring cameras construct a "visual neural network" for road traffic with their all-weather, high-precision sensing capabilities. They not only capture real-time road dynamics but also achieve automatic traffic event identification and data statistical analysis through intelligent algorithms, providing crucial support for traffic management, accident tracing, and congestion mitigation. They are core equipment for modern urban traffic governance and road safety assurance. Functionally, road traffic monitoring cameras achieve full-process coverage of monitoring, identification, analysis, and tracing. In real-time monitoring, mainstream equipment is equipped with high-definition lenses, with some high-speed scenarios employing ultra-high-definition configurations. Combined with focus adjustment, they can clearly capture vehicle license plates, vehicle models, and driver behavior.

[0003] In severe rainstorms, due to the rapid flow of rainwater, a large amount of rainwater can easily cover and adhere to the surface of camera lenses, directly interfering with the normal recording operation of the lenses, resulting in blurred images and reduced image quality. In existing technologies, cleaning rainwater from lenses mostly adopts contact wiping methods, that is, using cleaning tools such as scrapers or brushes to directly wipe the lens surface. Although this method can remove rainwater from the lens to a certain extent, the process of cleaning tools contacting the lens will directly obstruct the camera's field of view, which will create new interference with real-time recording and affect the continuity and integrity of the monitoring footage. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides the following technical solution: a road traffic monitoring camera suitable for severe weather, comprising: A camera, wherein a lens is fixedly connected to the side of the camera and a mounting component is fixedly connected to the bottom of the camera; A cleaning component is used to protect and clean the lens, and the side of the cleaning component is fixedly connected to the inside of the camera. The cleaning component includes a limiting shell, a fixing plate fixedly connected to one side of the limiting shell, a limiting plate fixedly connected to the other side of the fixing plate, a flow guiding mechanism fixedly connected to the side of the limiting shell away from the fixing plate, a cleaning mechanism fixedly connected to the inner side of the fixing plate, and air blowing mechanisms fixedly connected to both sides of the inner cavity of the limiting shell. The sides of the limiting shell, the limiting plate, and the fixing plate are all fixedly connected to the inner side of the camera. The cleaning mechanism includes a transparent sheet, a drive gear, and three transmission gears. The sides of the three transmission gears are rotatably connected to the side of the limiting housing near the fixed plate. The sides of the transparent sheet are rotatably connected to the limiting housing and the middle of the inner side of the limiting plate. The sides of the drive gear are meshed with the inner side of the driven gear. A drive component is fixedly connected to the inner side of the limiting housing. A driven gear is fixedly connected to the middle of the side of the transparent sheet. The sides of both the driven gear and the drive gear are rotatably connected to the sides of the limiting housing. The sides of the driven gear are meshed with the inner side of the driven gear. The middle of the drive gear is fixedly connected to the output end of the drive component. The transparent sheet is bidirectionally limited by the limiting housing and the limiting plate. The coaxiality error is small during rotation, which can reduce the problem of uneven centrifugal force caused by shaking, ensure that rainwater is shaken off more thoroughly, and does not affect the stability of lens imaging. Preferably, the air blowing mechanism includes a connecting ring and a piston cylinder. The side of the piston cylinder is fixedly connected to the inner side of the limiting shell. The side of the connecting ring is rotatably connected to the inner side of the limiting shell. The inner side of the connecting ring is fixedly connected to the middle of a transmission gear via a transmission shaft. A connecting shaft is fixedly connected to the side of the connecting ring. A connecting member is rotatably connected to the connecting shaft. A connecting block is rotatably connected to the other end of the connecting member. A piston rod is rotatably connected to the other end of the connecting block. A piston plate is fixedly connected to the other end of the piston rod. The side of the piston plate is slidably connected to the inner side of the piston cylinder. Air guide pipes are fixedly connected to both sides of the middle portion of the piston cylinder. The sides of the air guide pipes are fixedly connected to the inner side of the limiting shell. Air inlet grooves are evenly distributed on the side of the piston cylinder. The enlarged air intake area reduces resistance during gas intake and ensures more uniform gas discharge, providing a continuous and stable airflow for the air guiding mechanism. The directional airflow not only quickly blows away the cleaned rainwater but also prevents rainwater from splashing back onto the lens or accumulating on the equipment surface, further reducing the risk of lens obstruction. The entire airflow generation and cleaning mechanism share the same drive source, eliminating the need for additional independent drive components. This enables synchronized rainwater cleaning and airflow guidance, improving protection efficiency in severe weather. The airflow guidance does not require any parts to directly contact the lens. Compared to the contact cleaning of traditional cleaning tools, it does not obstruct the lens's field of view or damage the anti-fog and hydrophobic coatings on the lens or transparent sheet surface. While guiding rainwater, it always ensures the continuity and clarity of the monitoring image. Preferably, the flow guiding mechanism includes a guide ring, and the end of the air guide tube away from the piston cylinder is fixedly connected to the inner side of the guide ring. Both the guide ring and the flow guiding ring are fixedly connected to the side of the limiting shell away from the fixed plate. The inner side of the guide ring is provided with an air blowing groove. The air blowing groove provided on the inner side of the guide ring can form a uniform airflow field, covering the area around the transparent sheet, ensuring that rainwater splashed off when the transparent sheet rotates can be guided downward by the airflow no matter which direction it splashes, avoiding the problem of residual water leakage. A flow guiding ring is fixedly connected to the bottom of the guide ring. A first flow guiding groove is uniformly opened on the side of the flow guiding ring, and a second flow guiding groove is uniformly opened on the side of the guide ring away from the first flow guiding groove. Through the dual effect of active downward airflow and structured drainage, the situation of rainwater flowing back and splashing around the transparent sheet can be prevented, preventing rainwater from re-attaching to the transparent sheet or seeping into the lens area, and continuously ensuring the clarity of the lens's field of view. The entire flow guiding process relies on airflow and structural guidance, and no mechanical parts directly contact the transparent sheet, so as not to obstruct the real-time shooting image and ensure the continuity of monitoring. Preferably, the mounting component includes a mounting base and a mounting plate. The top of the mounting plate is fixedly connected to the bottom of the camera, and both sides of the mounting plate are rotatably connected to both sides of the mounting frame. A support frame is fixedly connected to the side of the mounting base, and a mounting frame is fixedly connected to the top of the support frame. Mounting blocks one are fixedly connected to both sides of the top of the mounting frame, and mounting blocks two are fixedly connected to the middle of the bottom of the mounting plate. Both sides of mounting blocks two are rotatably connected to two mounting blocks one. The inner sides of mounting blocks one and two are threadedly connected to threaded rods, and threaded rods are threadedly connected to the inner sides of the mounting plate and the mounting frame.

[0005] This invention provides a road traffic monitoring camera suitable for use in inclement weather. It has the following advantages: 1. This road traffic monitoring camera, suitable for severe weather, is equipped with a cleaning mechanism that uses centrifugal force to shake off water instead of traditional contact wiping. This avoids interruptions to recording caused by cleaning tools obstructing the lens, and also prevents the anti-fogging and hydrophobic coating on the transparent film from being damaged by friction, thus extending the service life of the transparent film.

[0006] 2. This road traffic monitoring camera, suitable for severe weather, is equipped with a cleaning mechanism. While cleaning the lens from rain, it eliminates the need for cleaning tools to directly contact the lens surface, fundamentally eliminating obstruction of the lens's field of view during the cleaning process and ensuring the continuity and clarity of the monitoring image at all times.

[0007] 3. This road traffic monitoring camera, suitable for severe weather, is equipped with an air blowing mechanism. The transmission from the drive component to the piston plate is connected layer by layer through mechanical structures such as gear meshing and shaft transmission, which can ensure the stability of the frequency and stroke of the piston plate's reciprocating motion, thereby ensuring the uniform pressure and flow of the gas output and avoiding the problem of incomplete rainwater diversion caused by the fluctuating strength of the guiding airflow.

[0008] 4. This road traffic monitoring camera, suitable for severe weather, is equipped with a flow guiding mechanism. Flow guiding channel one, flow guiding ring and flow guiding channel two form a complete drainage link to guide and collect rainwater for discharge. Rainwater can be discharged quickly, and the impact of residual rainwater freezing on the operation of the mechanism in low-temperature environments is also avoided. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the road traffic monitoring camera applicable to severe weather according to the present invention; Figure 2 This is a schematic diagram of the camera structure of the present invention; Figure 3 This is a schematic diagram of the cleaning component of the present invention; Figure 4 This is a schematic diagram of the structure of the limiting shell of the present invention; Figure 5 This is a schematic diagram of the cleaning mechanism of the present invention; Figure 6 This is a schematic diagram of the structure of the transparent sheet of the present invention; Figure 7 This is a schematic diagram of the flow guiding mechanism of the present invention; Figure 8 This is a schematic diagram of the air blowing mechanism of the present invention; Figure 9 This is a schematic diagram of the guide ring structure of the present invention; Figure 10 This is a schematic diagram of the mounting component of the present invention.

[0010] In the diagram: 1. Camera; 2. Mounting components; 21. Mounting base; 22. Support frame; 23. Mounting bracket; 24. Threaded rod; 25. Mounting block one; 26. Mounting plate; 27. Mounting block two; 3. Cleaning components; 31. Limiting housing; 32. Fixing plate; 33. Limiting plate; 34. Flow guiding mechanism; 341. Guide ring; 342. Air blowing channel; 343. Flow guiding ring; 344. Flow guiding channel one; 345 36. Flow guide channel 2; 36. Cleaning mechanism; 361. Driving component; 362. Drive gear; 363. Driven gear; 364. Transparent sheet; 365. Transmission gear; 37. Air blowing mechanism; 371. Connecting ring; 372. Coupling shaft; 373. Connecting component; 374. Connecting block; 375. Piston rod; 376. Piston plate; 377. Piston cylinder; 378. Air guide pipe; 379. Air inlet slot; 4. Lens. Detailed Implementation

[0011] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0012] Example 1, please refer to Figures 1-2 This invention provides a technical solution: a road traffic monitoring camera suitable for inclement weather, comprising: Camera 1, with lens 4 fixedly connected to the side of camera 1 and mounting component 2 fixedly connected to the bottom of camera 1; Cleaning component 3 is used to protect and clean the lens 4. The side of the cleaning component 3 is fixedly connected to the inside of the camera 1. Please see Figures 3-4 The cleaning component 3 includes a limiting shell 31, a fixing plate 32 fixedly connected to the side of the limiting shell 31, a limiting plate 33 fixedly connected to the other side of the fixing plate 32, a flow guiding mechanism 34 fixedly connected to the side of the limiting shell 31 away from the fixing plate 32, a cleaning mechanism 36 fixedly connected to the inner side of the fixing plate 32, and an air blowing mechanism 37 fixedly connected to both sides of the inner cavity of the limiting shell 31. The sides of the limiting shell 31, the limiting plate 33, and the fixing plate 32 are all fixedly connected to the inner side of the camera 1. In severe weather, the cleaning mechanism 36 can be opened to rotate within the space formed by the limiting housing 31, the fixing plate 32 and the limiting plate 33, thereby cleaning the rainwater on the surface of the lens 4 and preventing rainwater from obstructing the lens 4 and affecting normal video recording. Meanwhile, as the cleaning mechanism 36 operates and the rainwater is cleaned and falls, the diversion mechanism 34 can simultaneously divert the falling rainwater to prevent the rainwater from interfering with the lens 4 again. Please see Figures 5-6The cleaning mechanism 36 includes a transparent sheet 364, a drive gear 362, and three transmission gears 365. The sides of the three transmission gears 365 are rotatably connected to the side of the limiting housing 31 near the fixed plate 32. The sides of the transparent sheet 364 are rotatably connected to the middle of the inner side of the limiting housing 31 and the limiting plate 33. The sides of the drive gear 362 are meshed with the inner side of the driven gear 363. A drive member 361 is fixedly connected to the inner side of the limiting housing 31. A driven gear 363 is fixedly connected to the middle of the side of the transparent sheet 364. The sides of both the driven gear 363 and the drive gear 362 are rotatably connected to the side of the limiting housing 31. The side of the driven gear 363 is meshed with the inner side of the driven gear 363. The middle of the drive gear 362 is fixedly connected to the output end of the drive member 361. In harsh rainy weather, by activating the drive unit 361, the output end of the drive unit 361 drives the drive gear 362 to rotate stably within the fixed plate 32. With the help of gear meshing transmission, the driving gear 362 further drives the driven gear 363 to rotate synchronously in the fixed plate 32, and then the driven gear 363 drives the transparent sheet 364 to rotate at high speed in the inner side of the limiting shell 31, the limiting plate 33 and the fixed plate 32. During the rotation of the transparent sheet 364, the rainwater attached to its surface is quickly thrown off by the centrifugal force, preventing the rainwater from accumulating on the surface of the transparent sheet 364 and forming an obstruction, thus ensuring that the lens 4 always maintains a clear field of view. At the same time, when the driven gear 363 rotates, it also drives the three transmission gears 365 inside the fixed plate 32 to rotate synchronously on the side of the limiting housing 31 through meshing. Please see Figures 7-8 The blowing mechanism 37 includes a connecting ring 371 and a piston cylinder 377. The side of the piston cylinder 377 is fixedly connected to the inner side of the limiting housing 31. The side of the connecting ring 371 is rotatably connected to the inner side of the limiting housing 31. The inner side of the connecting ring 371 is fixedly connected to the middle of the transmission gear 365 through a transmission shaft. A connecting shaft 372 is fixedly connected to the side of the connecting ring 371. A connecting piece 373 is rotatably connected to the connecting shaft 372. A connecting block 374 is rotatably connected to the other end of the connecting piece 373. A piston rod 375 is rotatably connected to the other end of the connecting block 374. A piston plate 376 is fixedly connected to the other end of the piston rod 375. The side of the piston plate 376 is slidably connected to the inner side of the piston cylinder 377. Air guide pipes 378 are fixedly connected to both sides of the middle part of the piston cylinder 377. The side of the air guide pipes 378 is fixedly connected to the inner side of the limiting housing 31. Air inlet grooves 379 are evenly opened on the side of the piston cylinder 377. When the output end of the drive component 361 drives the drive gear 362 to rotate, the drive gear 362 will synchronously drive the driven gear 363 to rotate through the transmission relationship of gear meshing. Driven gear 363 further drives transmission gear 365 to operate stably within fixed plate 32. Transmission gear 365 drives connecting ring 371 to rotate synchronously within the cavity of limiting housing 31. After connecting ring 371 drives connecting member 373 to rotate via connecting shaft 372, connecting member 373 drives piston rod 375 to perform reciprocating linear motion via connecting block 374. Piston rod 375 then drives piston plate 376 to move synchronously reciprocating within piston cylinder 377. Gas generated during piston plate 376 movement is transported to flow guiding mechanism 34 via air guide pipe 378, and rainwater is guided and blown through directional airflow. Meanwhile, the intake grooves 379 are evenly opened on the side of the piston cylinder 377, which can further optimize the gas intake efficiency. Please see Figure 9 The flow guiding mechanism 34 includes a guide ring 341. The end of the air guide tube 378 away from the piston cylinder 377 is fixedly connected to the inner side of the guide ring 341. The guide ring 341 and the flow guiding ring 343 are both fixedly connected to the side of the limiting shell 31 away from the fixed plate 32. The inner side of the guide ring 341 is provided with an air blowing groove 342. The flow guiding ring 343 is fixedly connected to the lower part of the guide ring 341. The side of the flow guiding ring 343 is provided with a first flow guiding groove 344 evenly. The side of the flow guiding ring 343 away from the first flow guiding groove 344 is provided with a second flow guiding groove 345 evenly. When the piston plate 376 reciprocates within the piston cylinder 377, the gas it generates is transported to the guide ring 341 through the gas pipe. With the help of the air blowing grooves 342 arranged in a ring on the inner side of the guide ring 341, the gas is blown out evenly and in a direction, acting on the rainwater that is thrown off when the transparent sheet 364 rotates, blowing the rainwater downward and guiding it. The rainwater guided by the airflow will first flow into the guide ring 343 through the first guide groove 344, and then be smoothly discharged through the second guide groove 345 on the guide ring 343, thereby preventing the thrown-off rainwater from remaining around the transparent sheet 364 and preventing it from flowing again and interfering with the cleanliness of the lens 4 or the transparent sheet 364. Example 2, please refer to Figure 10 Based on Embodiment 1, the present invention provides a technical solution: Mounting component 2 includes mounting base 21 and mounting plate 26. The top of mounting plate 26 is fixedly connected to the bottom of camera 1. Both sides of mounting plate 26 are rotatably connected to both sides of mounting frame 23. Support frame 22 is fixedly connected to the side of mounting base 21. Mounting frame 23 is fixedly connected to the top of support frame 22. Mounting block 1 25 is fixedly connected to both sides of the top of mounting frame 23. Mounting block 27 is fixedly connected to the middle of the bottom of mounting plate 26. Both sides of mounting block 27 are rotatably connected to two mounting blocks 1 25. The inner sides of mounting blocks 1 25 and mounting block 27 are threadedly connected to threaded rod 24. Threaded rod 24 is threadedly connected to the inner sides of mounting plate 26 and mounting frame 23. After fixing the mounting base 21 to a suitable plane using fasteners, the angle of the mounting plate 26 on the mounting base 21 can be adjusted to drive the second mounting block 27 on the mounting plate 26 to rotate synchronously between the two first mounting blocks 25 on the mounting base 21, thereby completing the angle adjustment of the camera 1. After adjustment, use the fixing threaded rod 24 to pass through the corresponding holes of the mounting base 21 and the mounting plate 26 to lock their relative positions. Finally, install camera 1 on top of mounting plate 26, so that camera 1 can be positioned at a preset angle to perform normal video recording.

[0013] Specific workflow: After the camera 1 is fixed in a suitable position by the mounting component 2, it will start shooting. If there is heavy rain, and the rainwater adheres to the surface of the lens 4, causing obstruction and affecting the shooting effect, the cleaning component 3 can be activated to clean the rainwater from the lens 4, thus avoiding the problem of rainwater obstructing the lens 4 and interfering with normal monitoring work during heavy rain.

[0014] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A road traffic monitoring camera suitable for inclement weather, characterized in that, include: A camera (1) has a lens (4) fixedly connected to its side and a mounting component (2) fixedly connected to its bottom. Cleaning component (3) is used to protect and clean the lens (4), and the side of the cleaning component (3) is fixedly connected to the inside of the camera (1); The cleaning component (3) includes a limiting shell (31), a fixing plate (32) is fixedly connected to the side of the limiting shell (31), a limiting plate (33) is fixedly connected to the other side of the fixing plate (32), a flow guiding mechanism (34) is fixedly connected to the side of the limiting shell (31) away from the fixing plate (32), a cleaning mechanism (36) is fixedly connected to the inner side of the fixing plate (32), and an air blowing mechanism (37) is fixedly connected to both sides of the inner cavity of the limiting shell (31). The sides of the limiting shell (31), the limiting plate (33) and the fixing plate (32) are all fixedly connected to the inner side of the camera (1). The cleaning mechanism (36) includes a transparent sheet (364), a drive gear (362) and three transmission gears (365). A drive member (361) is fixedly connected to the inner side of the limiting housing (31). A driven gear (363) is fixedly connected to the middle of the side of the transparent sheet (364). The middle of the drive gear (362) is fixedly connected to the output end of the drive member (361).

2. A road traffic monitoring camera suitable for severe weather as described in claim 1, characterized in that: The side of the driving gear (362) meshes with the inside of the driven gear (363), and the side of the driven gear (363) meshes with the inside of the driven gear (363).

3. A road traffic monitoring camera suitable for severe weather as described in claim 2, characterized in that: The sides of the driven gear (363) and the driving gear (362) are rotatably connected to the side of the limiting shell (31). The side of the transparent sheet (364) is rotatably connected to the middle of the inner side of the limiting shell (31) and the limiting plate (33). The sides of the three transmission gears (365) are rotatably connected to the side of the limiting shell (31) near the fixing plate (32).

4. A road traffic monitoring camera suitable for severe weather as described in claim 1, characterized in that: The air blowing mechanism (37) includes a connecting ring (371) and a piston cylinder (377). The inner side of the connecting ring (371) is fixedly connected to the middle of the transmission gear (365) via a transmission shaft. A connecting shaft (372) is fixedly connected to the side of the connecting ring (371). A connecting piece (373) is rotatably connected to the connecting shaft (372). A connecting block (374) is rotatably connected to the other end of the connecting piece (373). A piston rod (375) is rotatably connected to the other end of the connecting block (374). A piston plate (376) is fixedly connected to the other end of the piston rod (375). Air guide pipes (378) are fixedly connected to both sides of the middle of the piston cylinder (377). Air inlet grooves (379) are evenly opened on the side of the piston cylinder (377).

5. A road traffic monitoring camera suitable for severe weather as described in claim 4, characterized in that: The side of the connecting ring (371) is rotatably connected to the inside of the limiting shell (31), the side of the piston cylinder (377) is fixedly connected to the inside of the limiting shell (31), the side of the piston plate (376) is slidably connected to the inside of the piston cylinder (377), and the side of the air guide pipe (378) is fixedly connected to the inside of the limiting shell (31).

6. A road traffic monitoring camera suitable for severe weather as described in claim 5, characterized in that: The flow guiding mechanism (34) includes a guide ring (341), an air blowing groove (342) is provided on the inner side of the guide ring (341), a flow guiding ring (343) is fixedly connected to the lower part of the guide ring (341), a flow guiding groove one (344) is uniformly provided on the side of the flow guiding ring (343), and a flow guiding groove two (345) is uniformly provided on the side of the flow guiding ring (343) away from the flow guiding groove one (344).

7. A road traffic monitoring camera suitable for severe weather as described in claim 6, characterized in that: The guide ring (341) and the flow guide ring (343) are both fixedly connected to the side of the limiting shell (31) away from the fixed plate (32), and the end of the air guide pipe (378) away from the piston cylinder (377) is fixedly connected to the inner side of the guide ring (341).

8. A road traffic monitoring camera suitable for severe weather as described in claim 1, characterized in that: The mounting component (2) includes a mounting base (21) and a mounting plate (26). A support frame (22) is fixedly connected to the side of the mounting base (21). A mounting frame (23) is fixedly connected to the top of the support frame (22). Mounting blocks (25) are fixedly connected to both sides of the top of the mounting frame (23). Mounting blocks (27) are fixedly connected to the middle of the bottom of the mounting plate (26). Threaded rods (24) are threadedly connected to the inner sides of the mounting plate (26) and the mounting frame (23).

9. A road traffic monitoring camera suitable for severe weather as described in claim 8, characterized in that: The top of the mounting plate (26) is fixedly connected to the bottom of the camera (1). Both sides of the second mounting block (27) are rotatably connected to the two first mounting blocks (25). Both sides of the mounting plate (26) are rotatably connected to the two sides of the mounting frame (23). The inner sides of the first mounting block (25) and the second mounting block (27) are threadedly connected to the threaded rod (24).

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