A mobile lighting vehicle with a lifting lighting lamp

Abstract

The application discloses a mobile lighting vehicle with a lifting lighting lamp, relates to the technical field of lamp poles, and improves the problem that the lifting stroke is restricted by the volume of a mechanism, and the mobile lighting vehicle comprises a base, a telescopic rod vertically arranged on the base and comprising a plurality of telescopic sections which are axially nested and relatively slid, and a telescopic driving assembly for controlling the telescoping of the telescopic rod, wherein the telescopic driving assembly comprises a chain box, a driving box arranged on one side of the bottom of the chain box and connected with the chain box, the driving box is fixed on the base, the bottom of the telescopic rod is fixedly connected with the top end of the driving box, a pushing chain is wound in the chain box, and the chain box is provided with an output port for the pushing chain to extend out.

Description

Technical Field

[0001] This application relates to the field of light pole lifting technology, and in particular to a mobile lighting vehicle with a lifting light. Background Technology

[0002] Mobile lighting vehicles, as a type of flexibly deployable lighting equipment, are widely used in outdoor scenarios such as nighttime construction and emergency repairs. One of their core functions is to adjust the lighting height and range by raising and lowering the lights to adapt to different on-site needs.

[0003] Currently, the lamp post lifting mechanisms of mobile lighting vehicles mainly rely on hydraulic cylinders or pneumatic cylinders. These pneumatic / hydraulic drive methods directly raise and lower the lamp post through the extension and retraction of the cylinder. While providing some driving force, they have significant limitations: First, the lifting stroke is directly limited by the length of the cylinder itself. To achieve a larger lifting stroke, a longer and larger cylinder must be used, resulting in a bulky and space-consuming lifting mechanism, as well as increasing the overall weight and manufacturing cost of the mobile lighting vehicle. Second, pneumatic / hydraulic systems typically include complex components such as pumps, valves, and pipelines, posing a risk of leakage (oil or gas) due to aging seals. This necessitates high maintenance requirements and challenges to long-term stability. Utility Model Content

[0004] To address the issue of the lifting stroke being constrained by the size of the mechanism, this application provides a mobile lighting vehicle with a lifting light.

[0005] This application provides a mobile lighting vehicle with a lifting light, which adopts the following technical solution: A mobile lighting vehicle with a lifting light includes: a base; a telescopic rod vertically mounted on the base, comprising several telescopic joints nested together axially and sliding relative to each other; and a telescopic drive assembly for controlling the extension and retraction of the telescopic rod. The telescopic drive assembly includes a chain box and a drive box located on one side of the bottom of the chain box and connected to it. The drive box is fixed to the base. The bottom of the telescopic rod is fixedly connected to the top of the drive box. A push chain is wound inside the chain box, and the chain box has an output port for the push chain to extend out. A conveying channel is formed inside the drive box, the upper end of which communicates with the internal cavity of the telescopic rod, and the lower end of which connects to the output port of the chain box. The telescopic drive assembly also includes a drive component for driving the push chain to move. The free end of the push chain extends from the output port through the conveying channel into the interior of the telescopic rod and extends axially upward, being fixedly connected to the bottom end of the topmost telescopic joint. This allows the extension and retraction of the push chain to directly pull the topmost telescopic joint up and down, thereby causing the entire telescopic rod to extend and retract synchronously.

[0006] By adopting the above technical solution, the bottleneck of the stroke of traditional hydraulic / pneumatic lifting mechanisms being limited by the length of the cylinder itself is fundamentally broken. By utilizing a coilable chain stored in a compact chain box, the required length for a large stroke is achieved, realizing the core objective of driving a large stroke in a small volume.

[0007] Optionally, the chain box is provided with a track plate for the push chain to pass through; the track plate has a spiral structure and is composed of alternating straight segments and arc segments connecting the two ends of the straight segments.

[0008] By adopting the above technical solution, a precise, orderly, and space-efficient motion path is provided for the deployment and retraction of the push chain. The spiral coiled structure ensures that the chain can be coiled regularly and densely within a limited space, effectively preventing the chain from jamming, tangling, or becoming disordered during movement, thereby ensuring a smooth and reliable lifting process with high repeatability.

[0009] Optionally, the straight section and the curved section of the chain box adopt a spliced ​​structure, and the curved section of the track plate is made of non-metallic material.

[0010] By adopting the above technical solutions, the modular structure facilitates manufacturing, assembly, and subsequent maintenance and replacement. In particular, the use of non-metallic materials (such as nylon and engineering plastics) in the curved sections of the track slab significantly reduces operating noise caused by friction and collision between the chain and the track at turns, improving the equipment's quiet operation. Simultaneously, non-metallic materials typically possess good wear resistance and self-lubricating properties, which helps extend the service life of the chain and track slab.

[0011] Optionally, the telescopic rod further includes a support block, which is fixedly installed in the bottom inner cavity of the telescopic joint. The support block has a support hole that matches the push chain and provides support and guidance for the push chain as it passes through.

[0012] By adopting the above technical solution, multiple intermediate support points and radial constraints are provided along the path for the slender push chain extending axially inside the telescopic rod. This effectively prevents the push chain from excessively sagging, swinging, or drifting laterally due to its own weight or movement, ensuring the straightness and stability of the force transmission path.

[0013] Optionally, the telescopic rod further includes a sleeve, which is fixedly installed on the top outer periphery of the telescopic joint; a base plate is provided at the bottom of the support block, and a guide ring is fixed on the base plate; the outer peripheral surface of the guide ring slides in conjunction with the inner wall of the adjacent outer telescopic joint, and an insertion groove for the telescopic joint to be inserted is formed between the guide ring and the support block; the inner wall of the sleeve is provided with a limiting protrusion to prevent the guide ring from dislodging from the top of the adjacent inner telescopic joint.

[0014] By adopting the above technical solution, the guide ring achieves coaxial sliding between sections, preventing skewing and jamming; the cooperation between the insertion groove and the limiting protrusion achieves reliable mechanical hard limiting at the end of the telescopic stroke, preventing the telescopic joint from disengaging when fully extended.

[0015] Optionally, the inner wall of the limiting protrusion is provided with a sealing ring groove for installing a sealing ring.

[0016] By adopting the above technical solution, the sealing ring, such as an O-ring, installed in the sealing ring groove can form an effective sealing barrier between the sleeve and the guide ring, preventing external pollutants such as rainwater and dust from entering the telescopic rod, protecting key components such as the push chain and support block from corrosion and contamination, thereby significantly improving the protection level and long-term working reliability of the entire equipment in harsh outdoor environments.

[0017] Optionally, the driving component includes a first toothed sprocket that meshes with the push chain and is installed inside the driving housing, and a driving motor. The driving motor is installed on the outer wall of the driving housing, and the output shaft of the driving motor is coaxially and fixedly connected to the first toothed sprocket that extends into the driving housing, so as to control the forward and reverse rotation of the first toothed sprocket.

[0018] By adopting the above technical solution, a drive implementation method that features direct power transmission, compact structure, and precise control is provided. By directly driving the toothed sprocket to engage the chain with a motor, precise electrical control of the lifting stroke and speed is achieved, resulting in rapid response.

[0019] Optionally, the drive unit further includes a synchronous belt and a second toothed sprocket. The output shaft of the drive motor extends out of the drive box and is coaxially fixed to a drive wheel. The lower arc segment of the chain box is rotatably connected to a synchronous shaft. The second toothed sprocket is coaxially fixed to the synchronous wheel and meshes with the push chain inside the chain box. One end of the synchronous shaft extends out of the chain box and is coaxially fixed to a driven wheel. The synchronous belt is tensioned and sleeved on the drive wheel and the driven wheel, so that the second toothed sprocket rotates synchronously with the first toothed sprocket.

[0020] By adopting the above technical solution, a dual-point synchronous drive mechanism is added to the basic drive system. Synchronous drive and constraint of the push chain are achieved by linking the toothed sprockets at both ends of the drive box and chain box via a synchronous belt. This effectively eliminates chain slack, vibration, or stress concentration that may occur with single-point drive, resulting in more even chain force distribution, smoother transmission, and further improved stability, smoothness, durability, and reliability of the lifting motion, as well as the overall drive system. In addition, the dual gears also synchronously solve the problem of large frictional forces generated by a single chain inside the track, allowing for longer product extension dimensions.

[0021] In summary, this application includes at least one of the following beneficial effects: 1. The chain winding drive replaces the traditional hydraulic / pneumatic cylinder, and the push chain is stored in the chain box, which fundamentally solves the problem of the lifting stroke being limited by the length of the cylinder. It can achieve large stroke lifting while significantly reducing the size of the mechanism, reducing the overall weight and manufacturing cost, and there is no risk of medium leakage. It is easy to maintain and has stable and reliable long-term operation. 2. Through multiple optimized structures such as spiral track plate, support block guidance, guide ring limit and double toothed sprocket synchronous drive, the push chain runs smoothly and is subjected to balanced force, effectively preventing chain deviation, expansion joint shaking or disengagement. Combined with the sealing design to block external contaminants, it significantly improves the stability of lifting motion, coaxial accuracy and working reliability in harsh environments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure in the embodiments of this application; Figure 2 This is a cross-sectional schematic diagram of an embodiment of this application; Figure 3 This is a schematic diagram of the connection between the chain box and the drive box in an embodiment of this application; Figure 4 This is a cross-sectional view of the chain box in an embodiment of this application; Figure 5 This is a partial cross-sectional view of the telescopic rod in an embodiment of this application; Figure 6 This is a schematic diagram of the support block structure in an embodiment of this application; Figure 7 This is a schematic diagram of the explosion of the sleeve in an embodiment of this application.

[0023] Explanation of reference numerals in the attached drawings: 1. Base; 2. Telescopic rod; 3. Telescopic joint; 4. Lighting lamp; 5. Chain box; 6. Drive box; 7. Push chain; 8. Track plate; 9. Straight section; 10. Curved section; 11. Output port; 12. Conveying channel; 13. Drive motor; 14. First toothed sprocket; 15. Output shaft; 16. Support block; 17. Support hole; 18. Sleeve; 19. Base plate; 20. Guide ring; 21. Insertion groove; 22. Limiting protrusion; 24. Sealing ring groove; 25. Synchronous shaft; 26. Second toothed sprocket; 27. Driving wheel; 28. Driven wheel; 29. ​​Synchronous belt. Detailed Implementation

[0024] The present application will be further described in detail below with reference to the accompanying drawings.

[0025] This application discloses a mobile lighting vehicle with a lifting lighting lamp. (See also...) Figure 1 , 2The mobile lighting vehicle includes a base 1, a telescopic rod 2, and a telescopic drive assembly. The base 1 serves as the overall support foundation. The telescopic rod 2 is vertically fixed to the base 1, supporting four lighting lamps and enabling its raising and lowering. The telescopic rod 2 is composed of multiple cylindrical telescopic sections 3 with progressively varying diameters nested together axially, allowing adjacent sections 3 to slide relative to each other. The bottommost telescopic section 3 is fixedly connected to the drive assembly, while the topmost telescopic section 3 is used to mount the lighting lamps 4.

[0026] Reference Figure 2 , 3 The telescopic drive assembly includes a chain box 5, a drive box 6, a push chain 7, and a drive component. The chain box 5 houses the push chain 7 and a track plate 8 that guides the push chain 7 as it is wound in an orderly fashion. The track plate 8 has a spiral structure, consisting of multiple straight segments 9 and alternating arc segments 10 connecting the ends of these straight segments 9, forming a continuous, spiraling upward or downward guide track. The push chain 7 is wound and laid on this track, allowing long sections of the push chain 7 to be regularly and tightly stored within the limited space of the chain box 5. An outlet 11 is provided on the side of the chain box 5 for the free end of the push chain 7 to extend out.

[0027] Reference Figure 3 , 4 As a preferred embodiment, the straight section 9 and the curved section 10 of the track slab 8 can be connected by a splicing structure, for example, by bolts or clips. This facilitates the processing, assembly, and subsequent maintenance and replacement of the components. Furthermore, the curved section 10 of the track slab 8 can be made of non-metallic materials such as nylon or polyoxymethylene. Since the chain makes frequent contact and friction with the track slab 8 when turning at the curved section 10, using such non-metallic materials with self-lubricating and shock-absorbing properties can effectively reduce operating noise and chain wear.

[0028] Reference Figure 2 , 3 The drive box 6 is fixedly mounted on the base 1, located on one side of the chain box 5. The drive box 6 contains the drive components. An internal conveying channel 12 is also formed within the drive box 6. The lower inlet of this channel 12 is aligned with and communicates with the output port 11 of the chain box 5, while its upper outlet communicates with the internal cavity of the bottom telescopic joint 3 of the telescopic rod 2. This conveying channel 12 provides a protected, directional path for the push chain 7 extending from the chain box 5, allowing it to smoothly transition from a horizontal or inclined coiled state to an initial state ready for vertical upward movement.

[0029] Reference Figure 2 , 3The free end of the push chain 7 passes sequentially through the output port 11 of the chain box 5 and the conveying channel 12 of the drive box 6, finally extending into the internal cavity of the telescopic rod 2. The free end of the push chain 7 extends straight upward along the axial direction of the telescopic rod 2 and is finally fixedly connected to the bottom end of the topmost telescopic joint 3. The connection method can be direct bolt fixing, or it can be hinged or fixed through a dedicated connecting seat.

[0030] Reference Figure 2 , 3 The driving component provides power for the movement of the push chain 7. The driving component includes a drive motor 13 and a first toothed sprocket 14. The drive motor 13 is mounted on the outer wall of the drive housing 6, and its output shaft 15 extends through the housing wall into the drive housing 6. The first toothed sprocket 14 is coaxially fixed to the output shaft 15 of the drive motor 13 and meshes with the chain link of the push chain 7 passing through the drive housing 6. By controlling the forward and reverse rotation of the drive motor 13, the first toothed sprocket 14 can be driven to rotate forward or reverse, thereby engaging and driving the push chain 7 to output outward or retract inward. In other embodiments, a transmission mechanism, such as a speed reducer, can be used for indirect control between the drive motor 13 and the first toothed sprocket 14; the drive motor 13's shaft drives the speed reducer, and the speed reducer's output shaft 15 extends into the drive housing 6 and is fixedly connected to the first toothed sprocket 14.

[0031] When the drive motor 13 starts and drives the first toothed sprocket 14 to rotate to release the push chain 7, the free end of the push chain 7 is pushed out of the chain box 5. Since this free end is fixed to the bottom of the top telescopic joint 3, it will generate an upward direct thrust on the top telescopic joint 3. The top telescopic joint 3 begins to rise, driving the nested telescopic joints 3 below it to extend one by one in sequence. Conversely, when it is necessary to descend, the drive motor 13 reverses, the push chain 7 is retracted and wound back into the chain box 5, and the tension of the chain pulls the top telescopic joint 3 downward, and the telescopic joints 3 retract one by one. This process is achieved entirely through mechanical chain drive, and the lifting stroke depends only on the effective length of the push chain 7 and is not directly related to the volume of the drive assembly itself, thus achieving the design goal of small volume and large stroke.

[0032] Reference Figure 2 , 5 To ensure that the push chain 7 can stably and straightenly transmit tension inside the telescopic rod 2 and prevent it from swaying or sagging due to its own weight or movement, this embodiment provides a support structure inside the telescopic rod 2. Specifically, a support block 16 is fixedly installed in the inner cavity at the bottom of the telescopic joint 3. The support block 16 has a support hole 17 that matches the cross-sectional shape of the push chain 7. When the push chain 7 passes through the telescopic joint 3, the support hole 17 provides radial constraint and circumferential support to the push chain 7, acting as an intermediate bearing seat and effectively ensuring the straightness of the push chain 7.

[0033] Reference Figure 5 , 6 To ensure smooth movement, high coaxiality, and prevent accidental disassembly during the extension and retraction of the multi-section telescopic rod 2, a sleeve 18 is fixedly installed on the top outer periphery of each telescopic section 3. Simultaneously, a base plate 19 extends downwards from the bottom of the support block 16, and a guide ring 20 is fixedly installed on the base plate 19. The outer peripheral surface of the guide ring 20 serves as a sliding surface, slidingly engaging with the inner wall of the adjacent outer telescopic section 3, thereby achieving coaxial guidance between adjacent telescopic sections 3 and preventing misalignment and jamming. An annular insertion groove 21 is formed between the guide ring 20 and the support block 16.

[0034] On the inner wall of the sleeve 18 at the top of the telescopic joint 3, there is a ring of inwardly protruding limiting protrusions 22. When the telescopic rod 2 is fully extended to its limit position, the upper end face of the guide ring 20 at the bottom of the lower support block 16 will abut against the lower surface of the limiting protrusion 22, thereby forming a mechanical hard limit, reliably preventing the inner and outer telescopic joints 3 from being excessively pulled apart, and ensuring structural safety.

[0035] In other preferred embodiments, in order to increase the overlap area between adjacent telescopic joints 3 when they are extended to their maximum position, thereby improving the overall stability of the telescopic joint 3, an extension sleeve of the same thickness as the guide ring 20 can be fitted around the bottom outer periphery of the telescopic joint 3. The extension sleeve abuts against the upper end face of the guide ring 20, and the extension sleeve replaces the guide ring 20 in contacting the limiting protrusion 22, thereby controlling the telescopic amount of the telescopic joint 3.

[0036] Reference Figure 7 To prevent rainwater and dust from entering and corroding components such as the push chain 7 and support block 16 through the sliding gaps between the expansion joints 3, an annular sealing groove 24 is formed on the inner wall of the aforementioned limiting protrusion 22. An elastic sealing ring, such as an O-ring, can be fitted into this sealing groove 24. When the telescopic rod 2 extends and the guide ring 20 slides within the adjacent outer expansion joint 3, the sealing ring always maintains elastic contact with the expansion joint 3, thereby forming an effective dynamic seal at the sliding joint, significantly improving the protection level and durability of the equipment.

[0037] Reference Figure 2 , 3 To further improve the smoothness of the push chain 7 transmission and reduce the local stress concentration or vibration of the chain that may be caused by single-point drive, a synchronous transmission mechanism is added to the drive component in addition to the aforementioned drive motor 13 and first toothed sprocket 14.

[0038] Specifically, inside the chain box 5, at its lowest point, in the arc segment 10 near the output port 11, a synchronous shaft 25 is rotatably connected via bearings. A second-tooth sprocket 26 is coaxially fixed on the synchronous shaft 25, and its teeth mesh with the push chain 7 links located in this area.

[0039] Reference Figure 2 , 3 A drive pulley 27, such as a belt pulley, is coaxially fixedly mounted on the end of the drive motor 13 or the output shaft 15 of the transmission mechanism that extends outside the drive box 6. Correspondingly, one end of the synchronization shaft 25 also extends outside the chain box 5, and a driven pulley 28 is coaxially fixedly mounted on that end. The synchronization belt 29 is tightly fitted onto the drive pulley 27 and the driven pulley 28, thereby synchronously transmitting the power of the drive motor 13 to the second toothed sprocket 26 inside the chain box 5.

[0040] When the drive motor 13 is working, the first toothed sprocket 14 and the second toothed sprocket 26 rotate completely synchronously under the linkage of the synchronous belt 29. Both simultaneously engage and drive or constrain the push chain 7, forming a dual-point synchronous drive for the push chain 7. This allows the push chain 7 to simultaneously obtain driving force near both the output and force-bearing ends, effectively improving the stress state of the chain and avoiding potential loosening, shaking, or wavy deformation of the chain during long-distance transmission. This results in a smoother and more stable lifting motion with lower noise, and improves the overall reliability and lifespan of the drive system.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mobile lighting vehicle with a lifting lighting lamp, characterized in that: include: Base (1); The telescopic rod (2) is vertically mounted on the base (1) and includes several telescopic joints (3) that are nested together along the axial direction and slide relative to each other. Telescopic drive assembly for controlling the extension and retraction of the telescopic rod (2); The telescopic drive assembly includes a chain box (5) and a drive box (6) located on one side of the bottom of the chain box (5) and connected to the chain box (5). The drive box (6) is fixed on the base (1). The bottom of the telescopic rod (2) is fixedly connected to the top of the drive box (6). A push chain (7) is wound inside the chain box (5). The chain box (5) has an output port (11) for the push chain (7) to extend out. A conveying channel (12) is formed inside the drive box (6). The upper end of the conveying channel (12) is connected to the inner end of the telescopic rod (2). The cavity is connected, and the lower end is connected to the output port (11) of the chain box (5); the telescopic drive assembly also includes a drive component for driving the push chain (7) to move; the free end of the push chain (7) extends from the output port (11) through the conveying channel (12) into the interior of the telescopic rod (2) and extends upward along the axis, and is fixedly connected to the bottom end of the telescopic joint (3) located at the top; so that the extension and retraction of the push chain (7) can directly pull the top telescopic joint (3) to rise and fall, thereby driving the entire telescopic rod (2) to extend and retract synchronously.

2. A mobile lighting vehicle with a lifting lighting lamp according to claim 1, characterized in that: The chain box (5) is provided with a track plate (8) for the push chain (7) to pass through; the track plate (8) has a spiral coiled structure and is composed of alternating straight segments (9) and arc segments (10) connected to both ends of the straight segments (9).

3. A mobile lighting vehicle with a lifting lighting lamp according to claim 2, characterized in that: The straight section (9) and the arc section (10) of the chain box (5) are connected by a splicing structure, and the arc section (10) of the track plate (8) is made of non-metallic material.

4. A mobile lighting vehicle with a lifting lighting lamp according to claim 1, characterized in that: The telescopic rod (2) also includes a support block (16), which is fixedly installed in the bottom cavity of the telescopic joint (3). The support block (16) has a support hole (17) that matches the push chain (7) and provides support and guidance for the push chain (7) that passes through it.

5. A mobile lighting vehicle with a lifting lighting lamp according to claim 4, characterized in that: The telescopic rod (2) also includes a sleeve (18), which is fixedly installed on the top outer periphery of the telescopic joint (3); the bottom of the support block (16) is provided with a base plate (19), and a guide ring (20) is fixed on the base plate (19); the outer peripheral surface of the guide ring (20) slides with the inner wall of the adjacent outer telescopic joint (3), and a insertion groove (21) for the telescopic joint (3) to be inserted is formed between the guide ring (20) and the support block (16); the inner wall of the sleeve (18) is provided with a limiting protrusion (22) to prevent the guide ring (20) from coming out of the top of the adjacent inner telescopic joint (3).

6. A mobile lighting vehicle with a lifting lighting lamp according to claim 5, characterized in that: The inner wall of the limiting protrusion (22) is provided with a sealing ring groove (24) for installing the sealing ring.

7. A mobile lighting vehicle with a lifting lighting lamp according to claim 1, characterized in that: The driving component includes a first toothed sprocket (14) installed inside the drive box (6) and meshing with the push chain (7) and a drive motor (13). The drive motor (13) is installed on the outer wall of the drive box (6). The output shaft (15) of the drive motor (13) is coaxially fixedly connected to the first toothed sprocket (14) that extends into the drive box (6) to control the forward and reverse rotation of the first toothed sprocket (14).

8. A mobile lighting vehicle with a lifting lighting lamp according to claim 7, characterized in that: The drive unit also includes a synchronous belt (29) and a second toothed sprocket (26). The output shaft (15) of the drive motor (13) extends out of the drive box (6) and is coaxially fixed to a drive wheel (27). The arc segment (10) at the lower end of the chain box (5) is rotatably connected to a synchronous shaft (25). The second toothed sprocket (26) is coaxially fixed on the synchronous wheel and meshes with the push chain (7) inside the chain box (5). One end of the synchronous shaft (25) extends out of the chain box (5) and is coaxially fixed to a driven wheel (28). The synchronous belt (29) is tensioned and sleeved on the drive wheel (27) and the driven wheel (28) so that the second toothed sprocket (26) rotates synchronously with the first toothed sprocket (14).

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