Angle-adjustable LED municipal street lamp

Abstract

The application relates to the technical field of street lamps, in particular to an angle-adjustable LED municipal street lamp, which comprises a lampshade and a lamp panel, the lampshade comprises a lower cover and an upper cover, the lower cover and the upper cover are fixedly connected through bolts, a mounting hole is arranged in the lower end surface of the lower cover and penetrates to the inner side of the lower cover, an elastic ring is fixedly arranged in the lower cover, the lower end of the elastic ring penetrates through the mounting hole and extends to the lower side of the lampshade, and an insertion groove is arranged in the outer side wall of the lamp panel; the angle-adjusting mechanism and the elastic ring are arranged in the lampshade, the elastic support of the elastic ring and the pulling force of the angle-adjusting mechanism are cooperated, the dynamic adjustment function of the light-emitting angle of the lamp panel is achieved, the street lamp can adapt to the lighting requirements of different-width lanes, curve radii and ramp angles, the construction and debugging difficulty and the later maintenance cost are reduced, the municipal facilities are promoted to develop in the direction of standardization, modularization and high efficiency, and the road lighting quality and the intelligent management level are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of street light technology, specifically to an angle-adjustable LED municipal street light. Background Technology

[0002] LED light sources, due to their advantages such as high luminous efficiency, long lifespan, strong directivity, and energy saving, have completely replaced traditional high-pressure sodium lamps and become the mainstream choice for municipal road lighting. In conventional road lighting design, the light emission angle of the lighting module directly affects the beam's projection distance, coverage width, and glare control. Most LED municipal lighting fixtures, for cost and sealing reasons, adopt a fixed internal structure, meaning the light-emitting module and the lamp housing are rigidly connected. This fixed light emission angle design has the following prominent drawbacks in actual large-scale municipal applications: First, existing lighting fixtures lack reliable and easily adjustable angle adjustment mechanisms. When there is an inherent tilt deviation in the on-site installation foundation, or when it is necessary to adjust the illumination angle of the installed lighting fixture, it is often necessary to disassemble the lighting fixture or loosen its main structural bolts for a rough overall adjustment. This process damages the initial seal and structural stability of the lighting fixture, and the adjustment accuracy is low and the repeatability is poor. Some lighting fixture angle adjustment schemes that use simple hinges and bolt locking are prone to loosening under long-term outdoor vibration, resulting in angle drift and insufficient reliability.

[0003] Secondly, road lighting needs are not static. For example, road widening, lane reclassification, tree growth blocking light, or the need to optimize lighting modes to cope with specific traffic conditions may all require adjustments to the illumination angle of the lighting modules. For streetlights with fixed beam angles, any angle adjustment is equivalent to a complex reinstallation, requiring the use of aerial work equipment and professional personnel. This results in high maintenance costs and slow response times, making dynamic optimization of road lighting difficult to achieve.

[0004] To address the aforementioned issues, while some simple angle adjustment structures have emerged in the existing technology, such as hinge mechanisms using bolt pairs for tightening or adjustment plates with elongated holes, these methods generally suffer from drawbacks such as insufficient linearity and intuitiveness in the adjustment process, poor locking reliability, and complex waterproof and dustproof structures, thus failing to fundamentally solve the problem.

[0005] Therefore, developing an LED municipal street light with a precise, efficient, reliable, and easy-to-operate angle adjustment mechanism to flexibly adapt to different road conditions and significantly reduce construction and commissioning difficulties and subsequent maintenance costs has become an urgent technical problem to be solved in this field. This is not only necessary to improve the quality of road lighting and the level of intelligent management, but also an inevitable requirement to promote the standardization, modularization, and efficiency of municipal facilities. Summary of the Invention

[0006] The purpose of this invention is to provide an angle-adjustable LED municipal street light to solve the problems of LED municipal street lights with fixed elevation angle design, that is, the angle between the lighting module and the rotating arm or lamp post is fixed at the factory, which cannot adapt to complex and ever-changing road conditions in actual municipal applications, and the difficulty in adjustment and high maintenance costs when road lighting needs change.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An angle-adjustable LED municipal street light includes a lampshade and a lamp panel. The lampshade includes a lower cover and an upper cover, which are fixedly connected by bolts. The lower end face of the lower cover has a mounting hole extending to the inside of the lower cover. An elastic ring is fixedly installed inside the lower cover, with its lower end passing through the mounting hole and extending to the lower side of the lampshade. An insertion groove is provided on the outer side wall of the lamp panel, and the lower end of the elastic ring is inserted into the insertion groove. The lamp panel is fixedly connected to the elastic ring. In its natural state, the elastic ring has an upward elastic potential energy. Four angle adjustment mechanisms are fixedly connected inside the lampshade. The lamp panel is rectangular, and the lower ends of the four angle adjustment mechanisms have movable ends, which are respectively connected to the four sides of the lamp panel. The angle adjustment mechanisms drive the lamp panel to deflect around the support point of the elastic ring by changing the tension applied to different sides of the lamp panel, thereby adjusting the light emission angle.

[0008] By incorporating an angle adjustment mechanism and an elastic ring within the lampshade, the dynamic adjustment of the light emission angle of the lamp panel is achieved through the synergistic effect of the elastic ring's elastic support and the angle adjustment mechanism's tension. Specifically, when adjusting the illumination direction, the tension at the moving ends of each of the four angle adjustment mechanisms can be independently controlled: for example, increasing the tension on the left side and decreasing the tension on the right side causes the lamp panel to deflect to the right around the elastic ring's support point, shifting the light projection direction to the right. Similarly, differential adjustment of the tension on the front and rear sides allows for adjustment of the pitch angle. This design overcomes the limitations of traditional fixed-angle streetlights, offering an adjustment range of ±15°, flexibly adapting to lighting needs of lanes with different widths, curve radii, and slope angles. Furthermore, the structure utilizes the elastic reset characteristic of the elastic ring to automatically maintain the current angle when the adjustment mechanism stops applying force, avoiding the drawbacks of traditional hinged structures requiring additional locking devices, significantly improving adjustment reliability and ease of operation.

[0009] Preferably, the elastic ring includes a mounting portion, a deformation portion, and an insertion portion. The mounting portion is located above the insertion portion, and the deformation portion is located between the mounting portion and the insertion portion. The mounting portion is horizontally positioned. A connecting flange is fixedly connected to the inner bottom wall of the lower cover. The upper end face of the mounting portion is fixedly connected to the lower end face of the connecting flange. The upper end of the deformation portion is connected to the inner side wall of the mounting portion, and the lower end of the deformation portion is connected to the outer side wall of the insertion portion. The deformation portion is inserted into the insertion groove and is fixedly connected to the lamp plate. The cross-section of the elastic ring is Z-shaped.

[0010] By designing the elastic ring as a mounting section, a deformation section, and an insertion section, and utilizing the elastic deformation characteristics of the deformation section, the lamp panel can deflect around the support point of the elastic ring when subjected to the pulling force of the angle adjustment mechanism, thereby achieving flexible adjustment of the light emission angle. This structural design not only ensures the stability of the lamp panel during adjustment but also automatically maintains the current angle after adjustment through the elastic reset effect of the deformation section, eliminating the need for additional locking devices, greatly simplifying the operation process and improving adjustment efficiency. Simultaneously, the Z-shaped cross-section design of the elastic ring enhances its structural strength, ensuring stable performance of the entire street light during long-term use.

[0011] Preferably, the upper end of the lamp panel is fixedly connected to a first reinforcing plate and a second reinforcing plate, and there are two first reinforcing plates and two second reinforcing plates. The two first reinforcing plates are symmetrically arranged on the upper side of the long side of the lamp panel, and the two second reinforcing plates are symmetrically arranged on the upper side of the short side of the lamp panel. The two first reinforcing plates are fixedly connected to the two adjacent second reinforcing plates.

[0012] By installing reinforcing plates No. 1 and No. 2 on the lamp panel, the overall structural strength of the lamp panel is enhanced, making it less prone to deformation or damage when subjected to the tension of the angle adjustment mechanism. This also improves the lamp panel's wind resistance, ensuring stable operation of the streetlights even in adverse weather conditions. Simultaneously, the reinforcing plates provide a more stable connection point for the angle adjustment mechanism, resulting in more even and reliable force transmission, further improving the accuracy and stability of angle adjustment. Furthermore, the symmetrical layout of the reinforcing plates helps maintain the balance of the lamp panel, preventing deflection or tilting due to excessive force on one side, thus guaranteeing the streetlight's lighting effect and lifespan.

[0013] Preferably, the angle adjustment mechanism includes a mounting frame, a reduction motor, a take-up reel, and a pull rope. Pull ropes are fixedly connected to the upper center of both the first and second reinforcing plates. The mounting frame has an L-shaped cross-section, and its lower end is fixedly connected to the upper surface of the connecting flange. The reduction motor is fixedly connected to the outer wall of the mounting frame, and its output end passes through the mounting frame. The take-up reel is coaxially fixedly connected to the output end of the reduction motor, and the upper end of the pull rope is fixedly connected to the outer wall of the take-up reel.

[0014] By employing an angle adjustment mechanism comprised of a mounting bracket, a geared motor, a take-up reel, and a pull rope, precise electric control of the light emission angle of the lamp panel is achieved. In operation, the geared motor rotates under the drive of the control system, causing the take-up reel to rotate synchronously. The tension of the pull rope is altered by the take-up or release of the wire: when increased tension is needed on one side, the corresponding geared motor rotates forward to tighten the pull rope; conversely, it rotates in the opposite direction to release the pull rope. This design converts motor torque into linear tension through mechanical transmission. Combined with the elastic support of the elastic ring, this allows the lamp panel to smoothly deflect within a ±15° range around the support point. Compared to traditional manual adjustment structures, this solution not only significantly improves adjustment accuracy (error controlled within ±0.5°) but also greatly reduces the difficulty of high-altitude operations through electric operation. Maintenance personnel can adjust the angle from the ground using a remote control, reducing the adjustment time from 30 minutes to less than 2 minutes. Meanwhile, the rigid connection design of the L-shaped mounting bracket and the connecting flange ensures the structural stability of the adjustment mechanism under long-term vibration environment, and the cooperative structure of the take-up reel and the pull rope effectively avoids the tangling problem that is prone to occur in traditional wire ropes, further improving the reliability of the system.

[0015] Preferably, an annular first limiting groove is formed on the upper end of the lower side wall of the insertion groove, and an annular second limiting groove is formed on the lower end surface of the insertion part. When the insertion part is inserted into the insertion groove, the first limiting groove and the second limiting groove are coaxial, and the insertion part and the insertion groove are fixedly connected by sealant.

[0016] By incorporating a coaxial annular limiting groove structure in the insertion slot and insertion part, and using sealant for bonding and fixing, a double sealing and protection effect is achieved. The combined design of the first and second limiting grooves not only enhances the connection stability between the elastic ring and the lamp panel, preventing loosening due to long-term vibration, but also effectively prevents rainwater, dust, and other external impurities from entering the lamp cover. The sealant filling the annular space formed by the limiting grooves creates a reliable waterproof barrier, and its bonding strength can withstand temperature cycles from -30℃ to 80℃ without failure. Compared with traditional planar sealing methods, this sealing structure increases the contact area by 3 times, achieving an IP67 waterproof rating, ensuring that the streetlight remains internally dry even in harsh environments such as heavy rain and sandstorms, significantly extending the service life of electronic components. Simultaneously, the annular design of the limiting grooves also serves a positioning function, ensuring that the assembly accuracy between the elastic ring and the lamp panel reaches ±0.1mm, providing a precise reference position for subsequent angle adjustments.

[0017] Preferably, a cable management groove is provided on the outer side wall of the take-up reel. The cable management groove is spirally arranged and coaxial with the take-up reel. The upper end of the pull rope is fixedly connected to the end of the cable management groove near the reduction motor.

[0018] By incorporating a spiral cable management groove on the outer wall of the take-up reel, orderly cable winding and unwinding are achieved. When the geared motor drives the take-up reel to rotate, the cable winds and unwinds evenly along the spiral trajectory of the cable management groove, effectively avoiding the problems of cable stacking and jamming that are prone to occur in traditional flat reel structures. This not only ensures that the cable maintains a neat arrangement during winding and unwinding, reducing cable wear caused by friction, but also prevents the cable from slipping on the take-up reel. Furthermore, the design of placing the cable fixing end near the motor side of the cable management groove allows the cable to naturally tighten towards the reel core during winding, further enhancing the stability of the winding process and ensuring the long-term operational accuracy of the adjustment mechanism.

[0019] Preferably, an isolation layer is provided on the lower end face of the mounting part, the outer side wall of the deformable part, and the lower end face of the insertion part. The isolation layer is made of resin material and the thickness of the isolation layer is 0.1 to 0.3 mm.

[0020] By incorporating a resin isolation layer at key locations on the elastic ring, multiple protective effects are achieved. This isolation layer, made of highly weather-resistant engineering resin, has a thickness precisely calculated and controlled within the range of 0.1-0.3 mm. It effectively prevents direct contact between metal components and the external environment without affecting the elastic deformation characteristics of the elastic ring. Specifically, the isolation layer on the lower end face of the mounting section prevents rainwater from seeping into the lamp housing along the connecting flange; the isolation layer on the outer wall of the deformation section resists erosion from corrosive particles contained in road dust; and the isolation layer on the lower end face of the insertion section avoids electrochemical corrosion with the metal components of the lamp panel. Furthermore, the low coefficient of friction of the resin material reduces the relative movement resistance between the elastic ring and the lamp panel, making the angle adjustment process smoother and further improving the system's response speed.

[0021] Preferably, the pull rope includes a steel wire and a weather-resistant layer, the weather-resistant layer being wrapped around the outer wall of the steel wire, the steel wire being made of stainless steel, and the weather-resistant layer being made of flexible resin material.

[0022] The pull rope employs a composite structure of steel wire and a weather-resistant layer, achieving a balance between strength and durability. The inner layer of steel wire is made of 304 stainless steel, with a tensile strength exceeding 520MPa, ensuring no plastic deformation under long-term tensile stress. Simultaneously, the stainless steel effectively resists chloride ion corrosion in road environments. The outer flexible resin weather-resistant layer is controlled to a thickness of 0.5mm. This double-layer design not only increases the overall service life of the pull rope to more than three times that of traditional steel wire ropes but also reduces frictional wear with the take-up reel through the lubrication effect of the resin layer, ensuring that the adjustment mechanism maintains an adjustment accuracy of ±0.3° across a wide temperature range of -40℃ to 85℃. In particular, the steel wire surface undergoes electrolytic polishing, achieving a surface roughness Ra≤0.8μm, further reducing the coefficient of friction between the steel wire and the weather-resistant layer, avoiding the risk of premature failure due to fretting wear.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention achieves dynamic adjustment of the light emission angle of the lamp panel by setting an angle adjustment mechanism and an elastic ring inside the lamp cover. The elastic support of the elastic ring and the tension of the angle adjustment mechanism work together to enable the street light to adapt to the lighting needs of lanes of different widths, curve radii, and slope angles. At the same time, it reduces the difficulty of construction and debugging and the cost of later maintenance, which strongly promotes the development of municipal facilities towards standardization, modularization, and efficiency, and effectively improves the quality of road lighting and the level of intelligent management.

[0024] 2. This invention designs the elastic ring as a combination of an installation part, a deformation part, and an insertion part. Utilizing the elastic deformation characteristics of the deformation part, the lamp panel can flexibly deflect around the support point of the elastic ring when subjected to the pulling force of the angle adjustment mechanism, achieving precise adjustment of the light emission angle. This not only ensures stability during the adjustment process but also automatically maintains the current angle after adjustment through elastic reset, eliminating the need for additional locking devices. This simplifies the operation process, improves adjustment efficiency, reduces the difficulty of high-altitude operations, and allows maintenance personnel to complete adjustments from the ground via remote control, enhancing the intelligent management level of road lighting.

[0025] 3. The present invention sets up a first reinforcing plate and a second reinforcing plate symmetrically distributed on the lamp panel. The first and second reinforcing plates not only provide a stable connection base for the angle adjustment mechanism, making the tension transmission more uniform and reliable, but also avoid the deflection phenomenon caused by unilateral force through the balance design, thereby ensuring the lighting effect and service life.

[0026] 4. This invention achieves electric control of the light emission angle of the lamp panel by using an angle adjustment mechanism consisting of a mounting frame, a reduction motor, a take-up reel, and a pull rope. Compared with the traditional manual adjustment structure, it improves the adjustment accuracy and ease of operation. At the same time, through the synergistic effect of mechanical transmission and elastic support, it ensures smooth deflection of the lamp panel within a range of ±15°, meeting the lighting needs of complex road conditions. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of the angle-adjustable LED municipal street light of the present invention; Figure 2 This is a schematic diagram of the structure of the luminaire in the angle-adjustable LED municipal street light of the present invention; Figure 3 for Figure 2 Full sectional view at point AA; Figure 4 for Figure 3 A magnified view of a section at point B in the middle; Figure 5 for Figure 4 A magnified view of a section at point C; Figure 6 for Figure 4 A magnified view of a section at point D; Figure 7 This is a schematic diagram of the structure of the adjustable LED municipal street light of the present invention after removing the upper cover; Figure 8 for Figure 7 A magnified view of a section at point E in the middle; Figure 9 for Figure 7 A magnified view of a section at point F.

[0028] In the diagram: 1. Lamp post; 2. Lamp arm; 3. Lamp cover; 301. Upper cover; 3011. Mounting hole; 302. Lower cover; 4. Lamp panel; 401. Insertion slot; 402. First limiting slot; 5. Elastic ring; 501. Mounting part; 502. Deformation part; 503. Insertion part; 505. Second limiting slot; 506. Isolation layer; 6. Connecting flange; 7. First reinforcing plate; 8. Second reinforcing plate; 9. Mounting bracket; 10. Gear motor; 11. Cable reel; 1101. Cable management trough; 12. Pull rope; 1201. Steel wire; 1202. Weather-resistant layer. Detailed Implementation

[0029] Please see Figures 1 to 9 This invention provides an angle-adjustable LED municipal street light, the technical solution of which is as follows: An angle-adjustable LED municipal street light, please refer to Figure 2 , Figure 5 , Figures 7 to 9The lamp includes a lampshade 3 and a lamp plate 4. The lampshade 3 includes a lower cover 302 and an upper cover 301, which are fixedly connected by bolts. The lower end face of the lower cover 302 has a mounting hole 3011 that extends to the inside of the lower cover 302. An elastic ring 5 is fixedly installed inside the lower cover 302. The lower end of the elastic ring 5 passes through the mounting hole 3011 and extends to the lower side of the lampshade 3. The outer wall of the lamp plate 4 has an insertion groove 401, and the lower end of the elastic ring 5 is inserted into the insertion groove 401. The lamp plate 4 and the elastic ring 5 are connected by bolts. Ring 5 is fixedly connected. In its natural state, the elastic ring 5 has upward elastic potential energy. The lamp plate 4 is rectangular. The upper end of the lamp plate 4 is fixedly connected to a first reinforcing plate 7 and a second reinforcing plate 8. There are two first reinforcing plates 7 and two second reinforcing plates 8. The two first reinforcing plates 7 are symmetrically arranged on the upper side of the long side of the lamp plate 4, and the two second reinforcing plates 8 are symmetrically arranged on the upper side of the short side of the lamp plate 4. The two first reinforcing plates 7 are fixedly connected to the two adjacent second reinforcing plates 8. Four angle adjustment mechanisms are fixedly connected inside the lamp cover 3. The angle adjustment mechanism includes a mounting frame 9, a reduction motor 10, a take-up reel 11, and a pull rope 12. Pull ropes 12 are fixedly connected to the upper middle parts of both the first reinforcing plate 7 and the second reinforcing plate 8. The pull rope 12 includes a steel wire 1201 and a weather-resistant layer 1202. The weather-resistant layer 1202 wraps around the outer wall of the steel wire 1201. The steel wire 1201 is made of stainless steel, and the weather-resistant layer 1202 is made of flexible resin material. The mounting frame 9 has an L-shaped cross-section, and its lower end is fixedly connected to the upper surface of the connecting flange 6. The geared motor 10 is fixedly connected to the outer wall of the mounting frame 9. The output end of the geared motor 10 passes through the mounting frame 9. The take-up reel 11 is coaxially fixedly connected to the output end of the geared motor 10. The upper end of the pull rope 12 is fixedly connected to the outer wall of the take-up reel 11. A cable management groove 1101 is provided on the outer wall of the take-up reel 11. The cable management groove 1101 is spirally arranged and coaxially arranged with the take-up reel 11. The upper end of the pull rope 12 is fixedly connected to the end of the cable management groove 1101 near the geared motor 10.

[0030] For further details, please refer to Figure 3 , Figure 4 and Figure 6The elastic ring 5 includes a mounting part 501, a deformable part 502, and an insertion part 503. The mounting part 501 is located above the insertion part 503, and the deformable part 502 is located between the mounting part 501 and the insertion part 503. The mounting part 501 is horizontally arranged. A connecting flange 6 is fixedly connected to the inner bottom wall of the lower cover 302. The upper end face of the mounting part 501 is fixedly connected to the lower end face of the connecting flange 6. The upper end of the deformable part 502 is connected to the inner side wall of the mounting part 501, and the lower end of the deformable part 502 is connected to the outer side wall of the insertion part 503. The deformable part 502 is inserted into the insertion groove 401 and is fixedly connected to the lamp plate 4. The elastic ring 5 has a Z-shaped cross-section; the upper end of the lower side wall of the insertion groove 401 is provided with an annular first limiting groove 402, and the lower end face of the insertion part 503 is provided with an annular second limiting groove 505. When the insertion part 503 is inserted into the insertion groove 401, the first limiting groove 402 and the second limiting groove 505 are coaxial, and the insertion part 503 and the insertion groove 401 are fixedly connected by sealant; the lower end face of the mounting part 501, the outer side wall of the deformable part 502 and the lower end face of the insertion part 503 are provided with an isolation layer 506. The isolation layer 506 is made of resin material and the thickness of the isolation layer 506 is 0.1 to 0.3 mm.

[0031] Please refer to [link / reference needed] for further information. Figure 1 The angle-adjustable LED municipal street light provided in this specific embodiment also includes a lamp post 1 and a lamp arm 2. Two lamp arms 2 are fixedly connected to the side wall of each lamp post 1. The two lamp arms 2 are arranged on the left and right sides and are arranged at different heights. A lamp cover 3 is fixedly connected to the end of each lamp arm 2 away from the lamp post 1. The power supply line passes through the lamp post 1 from the bottom end, passes through the lamp arm 2 from the lamp post 1, and then passes through the lamp cover 3 from the lamp arm 2. The end of the power supply line is connected to the lamp panel 4, and the power supply line provides power to the lamp panel 4.

[0032] It should also be noted that in some embodiments, the angle-adjustable LED municipal street light is installed in the alley. This type of angle-adjustable LED municipal street light does not have a lamp post 1, but only a lamp arm 2. One end of the lamp arm 2 is fixedly connected to the lamp cover 3, and the other end of the lamp arm 2 is fixedly connected to the wall by a flange and bolts. The power supply enters the lamp arm 2 and then enters the lamp cover 3 from the lamp arm 2. The end of the power supply line is connected to the lamp panel 4, and the power supply line provides power to the lamp panel 4.

[0033] Working principle: Please refer to Figures 1 to 9When installing angle-adjustable LED municipal streetlights, the foundation fixing of the lamp post 1 or lamp arm 2 must be completed first. If the lamp post 1 structure is used, the lamp post 1 must be vertically buried in the predetermined position and reinforced with concrete to ensure that the verticality error does not exceed ±0.5°. If the wall-mounted structure is used, expansion bolts must be pre-embedded in the wall, and the lamp arm 2 must be horizontally fixed through the flange, with the horizontality error controlled within ±0.3°. Then, the internal wiring is laid. The power supply line uses flame-retardant RVV sheathed wire, which is introduced from the bottom of the lamp post 1 or the junction box of the lamp arm 2, and laid along the internal wire groove to the lamp cover 3. The wire diameter is selected according to the power of the lamp board 4 to ensure that the voltage drop does not exceed 3%. Waterproof connectors must be used when connecting the cables. They are connected to the terminal block of the lamp board 4 inside the lamp cover 3 and then wrapped with insulating tape for secondary protection. After the wiring connection is completed, the mounting part 501 of the elastic ring 5 is fixed to the connecting flange 6 with bolts to ensure that the deformation part 502 hangs down naturally without twisting. Finally, the angle adjustment mechanism is debugged. The geared motor 10 is controlled to rotate forward and backward by remote control. The deflection angle of the lamp panel 4 is observed to be consistent with the set value. At the same time, the entanglement of the pull rope 12 in the cable management groove 1101 is checked to ensure that there is no overlapping or jamming. After debugging, the initial angle parameters are recorded and the control system is locked, thus completing the installation of the angle-adjustable LED municipal street light.

[0034] When the light emission angle of the lamp panel 4 needs to be adjusted according to different road conditions, the maintenance personnel send a command to the control system via remote control. After receiving the command, the control system drives the corresponding side reduction motor 10 to operate. If the light emission angle of a certain side of the lamp panel 4 needs to be increased, the reduction motor 10 on that side rotates in the forward direction, driving the take-up reel 11 to rotate synchronously. The cable groove 1101 on the take-up reel 11 makes the pull rope 12 evenly wound, increasing the tension of the pull rope 12 and pulling the first reinforcing plate 7 or the second reinforcing plate 8 on the corresponding side. Due to the elastic deformation characteristics of the deformation part 502 of the elastic ring 5, the lamp panel 4 will deflect around the support point of the elastic ring 5 in the direction of the pulling force, thereby increasing the light emission angle. Conversely, if the light emission angle needs to be decreased, the reduction motor 10 rotates in the reverse direction, the take-up reel 11 releases the pull rope 12, the tension of the pull rope 12 decreases, and under the elastic reset action of the elastic ring 5, the lamp panel 4 automatically returns to the position of the smaller light emission angle. Throughout the adjustment process, the two No. 1 reinforcing plates 7 and the two No. 2 reinforcing plates 8 are symmetrically distributed, providing a stable connection foundation for the angle adjustment mechanism. This ensures uniform and reliable force transmission, avoids deflection caused by unilateral force, and guarantees the stability of the adjustment. Meanwhile, the pull rope 12 adopts a composite structure of steel wire 1201 and weather-resistant layer 1202. The steel wire 1201 is made of 304 stainless steel, which has high tensile strength, can withstand tension for a long time without plastic deformation, and effectively resists chloride ion corrosion in the road environment. The outer flexible resin weather-resistant layer 1202 reduces friction and wear with the take-up reel 11 through lubrication, ensuring that the adjustment mechanism maintains high adjustment accuracy over a wide temperature range. Furthermore, the isolation layer 506 on the elastic ring 5 prevents rainwater from seeping into the lamp cover 3 along the connecting flange 6 on the lower end face of the mounting part 501. The isolation layer 506 on the outer wall of the deformable part 502 resists the erosion of corrosive particles in road dust. The isolation layer 506 on the lower end face of the insertion part 503 avoids electrochemical corrosion with the metal parts of the lamp panel 4. The low coefficient of friction of the resin material reduces the relative movement resistance between the elastic ring 5 and the lamp panel 4, making the angle adjustment process smoother and further improving the system's response speed. Through this synergistic effect, dynamic, precise, and stable adjustment of the light emission angle of the lamp panel 4 is achieved, meeting the lighting needs of lanes of different widths, curve radii, and slope angles. This reduces the difficulty of construction and debugging, as well as subsequent maintenance costs, and improves the quality of road lighting and the level of intelligent management.

[0035] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. An angle-adjustable LED municipal street light, comprising a lampshade (3) and a lamp panel (4), characterized in that, The lampshade (3) includes a lower cover (302) and an upper cover (301), which are fixedly connected by bolts. The lower end face of the lower cover (302) is provided with a mounting hole (3011), which extends through to the inside of the lower cover (302). An elastic ring (5) is fixedly installed inside the lower cover (302), and the lower end of the elastic ring (5) passes through the mounting hole (3011) and extends to the lower side of the lampshade (3). An insertion groove (401) is provided on the outer wall of the lamp plate (4), and the lower end of the elastic ring (5) is inserted into the lamp. Inserted into the insertion slot (401), the lamp plate (4) is fixedly connected to the elastic ring (5). In its natural state, the elastic ring (5) has an upward elastic potential energy. Four angle adjustment mechanisms are fixedly connected inside the lamp cover (3). The lamp plate (4) is rectangular. The lower ends of the four angle adjustment mechanisms are provided with movable ends. The four movable ends are respectively connected to the four sides of the lamp plate (4). The angle adjustment mechanism drives the lamp plate (4) to deflect around the support point of the elastic ring (5) by changing the tension applied to different sides of the lamp plate (4), thereby realizing the adjustment of the light emission angle.

2. The angle-adjustable LED municipal street light according to claim 1, characterized in that, The elastic ring (5) includes a mounting part (501), a deformation part (502), and an insertion part (503). The mounting part (501) is located on the upper side of the insertion part (503), and the deformation part (502) is located between the mounting part (501) and the insertion part (503). The mounting part (501) is horizontally arranged. A connecting flange (6) is fixedly connected to the inner bottom wall of the lower cover (302). The upper end face of the mounting part (501) is fixedly connected to the lower end face of the connecting flange (6). The upper end of the deformation part (502) is connected to the inner side wall of the mounting part (501), and the lower end of the deformation part (502) is connected to the outer side wall of the insertion part (503). The deformation part (502) is inserted into the insertion groove (401) and is fixedly connected to the lamp plate (4). The cross-section of the elastic ring (5) is Z-shaped.

3. The angle-adjustable LED municipal street light according to claim 2, characterized in that, The upper end of the lamp plate (4) is fixedly connected to a first reinforcing plate (7) and a second reinforcing plate (8). There are two first reinforcing plates (7) and two second reinforcing plates (8). The two first reinforcing plates (7) are symmetrically arranged on the upper side of the long side of the lamp plate (4), and the two second reinforcing plates (8) are symmetrically arranged on the upper side of the short side of the lamp plate (4). The two first reinforcing plates (7) are fixedly connected to the two adjacent second reinforcing plates (8).

4. The angle-adjustable LED municipal street light according to claim 3, characterized in that, The angle adjustment mechanism includes a mounting frame (9), a reduction motor (10), a take-up reel (11), and a pull rope (12). The pull rope (12) is fixedly connected to the upper middle part of the first reinforcing plate (7) and the second reinforcing plate (8). The mounting frame (9) has an L-shaped cross section. The lower end of the mounting frame (9) is fixedly connected to the upper end face of the connecting flange (6). The reduction motor (10) is fixedly connected to the outer wall of the mounting frame (9). The output end of the reduction motor (10) passes through the mounting frame (9). The take-up reel (11) is coaxially fixedly connected to the output end of the reduction motor (10). The upper end of the pull rope (12) is fixedly connected to the outer wall of the take-up reel (11).

5. An angle-adjustable LED municipal street light according to claim 2, characterized in that, The lower side wall of the insertion groove (401) is provided with an annular first limiting groove (402), and the lower end surface of the insertion part (503) is provided with an annular second limiting groove (505). When the insertion part (503) is inserted into the insertion groove (401), the first limiting groove (402) and the second limiting groove (505) are coaxial. The insertion part (503) and the insertion groove (401) are fixedly connected by adhesive.

6. An angle-adjustable LED municipal street light according to claim 4, characterized in that, The outer wall of the take-up reel (11) is provided with a cable management groove (1101). The cable management groove (1101) is spirally arranged and is coaxial with the take-up reel (11). The upper end of the pull rope (12) is fixedly connected to the end of the cable management groove (1101) near the reduction motor (10).

7. An angle-adjustable LED municipal street light according to claim 2, characterized in that, An isolation layer (506) is provided on the lower end face of the mounting part (501), the outer side wall of the deformable part (502), and the lower end face of the insertion part (503). The isolation layer (506) is made of resin material and the thickness of the isolation layer (506) is 0.1 to 0.3 mm.

8. An angle-adjustable LED municipal street light according to claim 4, characterized in that, The pull rope (12) includes a steel wire (1201) and a weather-resistant layer (1202). The weather-resistant layer (1202) is wrapped around the outer wall of the steel wire (1201). The steel wire (1201) is made of stainless steel, and the weather-resistant layer (1202) is made of flexible resin material.

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