Lifting structure for the working head of a leveling machine

Abstract

This invention discloses a lifting structure for the working head of a concrete laser screed, comprising a lifting mechanism, an adjusting bracket, a vibration damping component, and a laser receiver. The lifting mechanism is fixedly installed at the front end of the working head of the screed via an assembly bracket. The adjusting bracket includes a support platform that slides vertically on the assembly bracket and an adjusting plate for connecting a scraper mechanism. The lifting mechanism drives the support platform to slide vertically on the surface of the assembly bracket. Multiple sets of drive components for controlling the three-dimensional rotation adjustment of the adjusting plate are detachably installed on the support platform. This invention solves the problems of existing lifting structures for concrete laser screed working heads, which are inconvenient for flexible multi-angle leveling of the scraper, affecting the actual leveling effect of the equipment on the concrete surface, and the lifting structure itself and components such as the laser receiver being easily damaged by the vibration of the scraper, which is not conducive to improving the actual service life of the components.

Description

Technical Field

[0001] This invention relates to the field of concrete laser leveling equipment technology, specifically to a lifting structure for the working head of a leveling machine. Background Technology

[0002] A concrete laser screed is a high-precision automated device used for concrete construction, primarily for paving, vibrating, and leveling large areas of flooring (such as industrial plants, warehouses, plazas, and parking lots). It achieves high-precision leveling through a laser measurement and control system, significantly improving construction efficiency and quality. The equipment uses a laser transmitter and receiver to monitor elevation in real time and automatically adjusts the scraper height using a lifting structure at the working head.

[0003] Existing concrete laser screed machine working head lifting structures typically use hydraulic rods to directly control the height of the scraper at the bottom. However, in actual use, concrete laser screed machines are often affected by factors such as ground flatness, resulting in overall vehicle tilting. This tilting directly causes the scraper at the working head to tilt as well. The lifting structure cannot perform multi-angle leveling of the front scraper, which affects the flatness of the concrete being leveled. Furthermore, the scrapers connected to the lifting structure are often equipped with vibration motors to improve the actual leveling effect. Poor vibration damping of the lifting structure affects its own lifespan and that of components such as the laser receiver. Therefore, those skilled in the art have provided a lifting structure for the working head of a screed machine to solve the problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this invention is to provide a lifting structure for the working head of a screed machine, in order to solve the problems that the existing lifting structure of the working head of a concrete laser screed machine is not convenient for flexibly leveling the scraper at multiple angles, which affects the actual leveling effect of the equipment on the concrete surface. Furthermore, the lifting structure itself and components such as the laser receiver are easily damaged by the vibration of the scraper, which is not conducive to improving the actual service life of the components.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a lifting structure for the working head of a leveling machine, used to control the height of the concrete leveling scraper mechanism, comprising:

[0006] A lifting mechanism is fixedly installed at the front end of the working head of the leveling machine via an assembly bracket;

[0007] An adjustment bracket includes a support platform that is slidably mounted on the assembly bracket and an adjustment plate for connecting a scraper mechanism. The lifting mechanism is used to drive the support platform to slide up and down on the surface of the assembly bracket. Multiple sets of drive components for controlling the adjustment plate to perform three-dimensional rotation adjustment are detachably mounted on the support platform.

[0008] Vibration damping components are detachably installed on each set of driving components. The vibration damping components suppress the transmission of vibration by absorbing the energy of vibration.

[0009] Two sets of laser receivers are provided symmetrically on the left and right sides. The two sets of laser receivers are detachably mounted on the top of the support platform via connecting brackets.

[0010] Preferably, the support platform includes two sets of upper and lower support plates for supporting multiple sets of driving components. Both sets of support plates slide through the assembly bracket. The connecting bracket is detachably installed on the top support plate, and the bottom support plate is connected to the lifting mechanism.

[0011] Preferably, the driving component includes a servo motor fixedly installed between the upper and lower support plates, a rotating plate fixedly installed at the output end of the servo motor, the rotating plate being connected to the adjusting plate via detachable legs, and the vibration damping component being detachably installed on the legs.

[0012] Preferably, the support leg includes an upper branch rod detachably mounted on the rotating plate and a lower branch rod detachably mounted on the adjusting plate. The ends of the upper and lower branch rods are ball-jointed with short connecting rods, and a long connecting rod with a vibration damping component is detachably installed between the upper and lower sets of short connecting rods.

[0013] Preferably, threaded rods are welded to the end of the short connecting rod near the long connecting rod and to both ends of the long connecting rod, and a fixing nut is threaded onto each set of threaded rods. A vibration damping component is detachably installed on the outer ring of the bottom end of the long connecting rod.

[0014] Preferably, the vibration damping assembly includes a support base threadedly connected to a long connecting rod, a spring fixedly mounted on the top of the support base and sleeved on the outer ring of the long connecting rod, a slider fixedly mounted on the top of the spring and slidably sleeved on the outer ring of the long connecting rod, and a rubber ring conforming to the outer surface of the long connecting rod fixedly mounted on the inner ring of the slider.

[0015] Preferably, the lifting mechanism includes a support frame fixedly connected to the assembly bracket. A set of lead screws and two sets of auxiliary rods are rotatably installed inside the support frame. Two sets of moving blocks are threaded onto the lead screws. The auxiliary rods slide through the two sets of moving blocks. Both sets of moving blocks are connected to the bottom support plate through hinged push rods. A drive motor is fixedly installed on one side of the support frame. The drive motor is used to control the rotation of the lead screws to drive the two sets of moving blocks to move in opposite directions.

[0016] Preferably, the assembly bracket includes an assembly plate for fixing to a concrete laser screed machine. The assembly plate is connected to a support frame via detachably mounted brackets. Two sets of columns that slide through the support plate are welded to the top of the support frame. A reinforcing plate is detachably mounted between the top of the two sets of columns and the assembly plate.

[0017] Preferably, the connecting bracket includes a frame plate that is bolted to a top support plate. Both ends of the frame plate are welded with sleeves, and vertical rods for supporting the laser receiver are bolted to the sleeves.

[0018] Preferably, a tilt sensor is fixedly installed on the adjustment plate. The tilt sensor is used to provide real-time feedback of the attitude data of the adjustment plate, so that multiple sets of driving components can perform leveling and adjustment on the adjustment plate.

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

[0020] The lifting mechanism is connected to an adjustable bracket that can slide up and down on the surface of the assembly support. The adjustable bracket includes an adjusting plate controlled by a drive component. The adjusting plate can drive the scraper and other components assembled at its bottom to rotate and adjust together. When the concrete laser screed tilts due to site conditions, or when the leveling surface becomes an incline, the drive component can be used to adjust the adjusting plate and its connecting structure to be horizontal or parallel to the incline. The adjustable bracket, with its advantages of multi-degree-of-freedom precise control, dynamic self-adaptation, and high rigidity structure, can solve the problems of low accuracy, poor adaptability, and reliance on manual labor in traditional leveling methods. It is especially suitable for the modern construction needs of high precision and complex working conditions. Furthermore, vibration damping components are installed on the legs of the adjustable bracket. These components effectively reduce the upward transmission of vibration from the bottom of the concrete laser screed's working head, reduce the impact of vibration on the signal reception accuracy of the laser receiver, and avoid damage to precision components from continuous vibration, thereby effectively improving the accuracy and service life of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a bottom view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the lifting mechanism and assembly support structure of the present invention;

[0024] Figure 4 This is a cross-sectional view of the lifting mechanism structure of the present invention;

[0025] Figure 5 This is a first schematic diagram of the structure of the adjusting bracket and vibration damping assembly of the present invention;

[0026] Figure 6 This is a second schematic diagram of the structure of the adjusting bracket and vibration damping assembly of the present invention;

[0027] Figure 7 This is a schematic diagram of the combination of the outrigger structure and the vibration damping component of the present invention;

[0028] Figure 8 This is a schematic diagram showing the disassembly of the support leg structure of the present invention.

[0029] Legend:

[0030] 10. Lifting mechanism; 101. Support frame; 102. Lead screw; 103. Auxiliary rod; 104. Moving block; 105. Push rod; 106. Drive motor;

[0031] 20. Assembly bracket; 201. Assembly plate; 202. Frame pole; 203. Column; 204. Reinforcing plate;

[0032] 30. Adjustable bracket; 301. Support platform; 302. Adjustable plate; 303. Drive component; 3031. Servo motor; 3032. Rotating plate; 3033. Support leg; 30331. Upper branch; 30332. Lower branch; 30333. Short connecting rod; 30334. Long connecting rod;

[0033] 40. Vibration damping assembly; 401. Support base; 402. Spring; 403. Slider; 404. Rubber ring;

[0034] 50. Connecting bracket; 501. Frame plate; 502. Sleeve; 503. Vertical rod;

[0035] 11. Laser receiver; 12. Threaded rod; 13. Fixing nut; 14. Tilt sensor. Detailed Implementation

[0036] 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.

[0037] Please see Figures 1 to 8In this embodiment of the invention, the lifting structure for the working head of the leveling machine, used to control the height of the concrete leveling scraper mechanism, includes a lifting mechanism 10, an adjusting bracket 30, a vibration damping component 40, and a laser receiver 11, etc. The lifting mechanism 10 is fixedly installed at the front end of the working head of the leveling machine via an assembly bracket 20. The adjusting bracket 30 includes a support platform 301 slidably mounted on the assembly bracket 20 and an adjusting plate 302 for connecting the scraper mechanism. The lifting mechanism 10 is used to drive the support platform 301 to slide up and down on the surface of the assembly bracket 20. Multiple sets of adjustment plates 302 for controlling the adjustment plate 302 are detachably installed on the support platform 301. The drive unit 303 for rotation adjustment has a set of vibration damping components 40 that can be detachably installed on each drive unit 303. The vibration damping components 40 suppress the transmission of vibration by absorbing the energy of vibration. Two sets of laser receivers 11 are symmetrically arranged on the left and right sides. The two sets of laser receivers 11 are detachably installed on the top of the support platform 301 through the connecting bracket 50. The concrete laser screed system forms a closed-loop feedback: laser signal → receiver → controller → lifting mechanism 10, adjusting bracket 30 execution → scraper height, angle → feedback signal. Even if the ground is uneven or the screed body is tilted, the screed can still keep the concrete surface consistent with the laser reference.

[0038] In actual use, the lifting mechanism 10 is fixedly installed at the working head of the concrete laser screed via the assembly bracket 20. The scraper mechanism for leveling the concrete surface is fixed to the adjusting plate 302 at the bottom of the adjusting bracket 30. When the lifting mechanism 10 is started, it can drive the adjusting plate 302 and the scraper mechanism to move up and down via the movable adjusting bracket 30. The concrete laser screed can level the concrete surface by driving the scraper mechanism to move horizontally. When the equipment tilts due to site conditions, multiple sets of drive components 303 drive the bottom... The rotation of the adjusting plate 302 can level the adjusting plate 302 and the scraper mechanism at its bottom, which facilitates the improvement of the flatness of the concrete construction. The adjusting bracket 30 can realize the multi-dimensional movement of the adjusting plate 302, such as lifting, pitching, rolling and yaw, through six sets of driving components 303, and correct the posture of the leveling structure in real time. Traditional leveling machines require manual intervention or replacement of parts to handle slopes or curved roads. The adjusting plate 302, controlled by multiple sets of driving components 303, can adjust the posture of the leveling structure to adapt to different processing needs and improve the flexibility of the actual use of the equipment.

[0039] The laser emitter is mounted on a tripod at the construction site, emitting a rotating laser beam to form a horizontal reference plane or a slope with a preset gradient. This plane serves as the absolute reference for the leveling height. The laser receiver 11, fixedly mounted on the connecting bracket 50, captures the laser signal in real time. The equipment controller (such as an MCU or PLC) converts the analog signal from the receiver into digital instructions and quickly adjusts the lifting mechanism 10 and the adjusting bracket 30 through a PID algorithm. The rapid response of the components enables precise leveling of the concrete. However, the equipment scraper mechanism is often equipped with a vibration motor. The vibration of the scraper mechanism during use will be transmitted to the lifting mechanism 10 and the laser receiver 11 through the adjusting bracket 30. Vibration not only affects the service life of the components but also easily affects the signal reception of the laser receiver 11. Adding a vibration damping component 40 to the adjusting bracket 30 can effectively reduce the vibration of components such as the lifting mechanism 10 and the laser receiver 11, thereby ensuring the stable operation of the equipment.

[0040] The support platform 301 includes two sets of upper and lower support plates for supporting multiple sets of drive components 303. Both sets of support plates slide through the assembly bracket 20. The connecting bracket 50 is detachably installed on the top support plate, and the bottom support plate is connected to the lifting mechanism 10. The upper and lower support plates provide installation space for the drive components 303 and facilitate assembly with the lifting mechanism 10 and the assembly bracket 20. The upper part of the adjusting plate 302 can be a hexagonal plate connected to the drive components 303. The support platform 301 can also be a hexagonal plate structure that facilitates the arrangement of multiple sets of drive components 303. The lower part of the adjusting plate 302 can be a docking plate with mounting holes. The lower part of the adjusting plate 302 facilitates detachable connection with the scraper mechanism. Holes and slots can also be opened inside the plate to reduce its own weight, thereby reducing the production cost of the components. The asymmetric force distribution of the vibratory leveling head is evenly distributed by the six sets of drive components 303 to avoid single-point overload. The coordinated movement of multiple sets of drive components 303 absorbs the impact load and protects the precision components such as the lead screw 102 of the lifting mechanism 10.

[0041] In one embodiment, see Figures 1-2 and Figures 5-6 Specifically, the drive unit 303 includes a servo motor 3031 fixedly installed between the upper and lower support plates. A rotating plate 3032 is fixedly installed at the output end of the servo motor 3031. The rotating plate 3032 is connected to the adjusting plate 302 through a detachable support leg 3033. The vibration damping component 40 is detachably installed on the support leg 3033. When the servo motor 3031 is turned on, it can drive the rotating plate 3032 connected to its output end to rotate. The rotating plate 3032 can be adjusted by pulling the adjusting plate 302 at its bottom end through the support leg 3033. The Stewart platform, which consists of the support platform 301, the adjusting plate 302 and multiple drive units 303, achieves the angle adjustment of the adjusting plate 302 through the coordinated extension and retraction of six actuators.

[0042] See Figures 5-8Correspondingly, the outrigger 3033 includes an upper branch 30331 detachably mounted on the rotating plate 3032 and a lower branch 30332 detachably mounted on the adjusting plate 302. Both the upper branch 30331 and the lower branch 30332 have short connecting rods 30333 ball-jointed at their ends. A long connecting rod 30334 with a vibration damping assembly 40 is detachably mounted between the two sets of short connecting rods 30333. The various rods are easy to disassemble, facilitating the assembly of the vibration damping assembly 40. The short connecting rod 30333 is close to... Threaded rods 12 are welded to both ends of the long connecting rod 30334. Each set of threaded rods 12 is threaded with a fixing nut 13. A vibration damping component 40 is detachably installed on the outer ring of the bottom end of the long connecting rod 30334. The threaded rods 12 at the ends of the long connecting rod 30334 and the short connecting rod 30333 are of the same diameter. One set of fixing nuts 13 at the joint is used to connect the ends of the two sets of threaded rods 12, and another set of fixing nuts 13 is used to lock the aforementioned fixing nuts 13. The assembly and disassembly structure is simple and easy to operate.

[0043] Based on the above embodiments, see [link to relevant documentation]. Figures 1-2 and Figures 5-8 Specifically, the vibration damping component 40 includes a support base 401 threadedly connected to the long connecting rod 30334. A spring 402 is fixedly installed on the top of the support base 401 and sleeved on the outer ring of the long connecting rod 30334. A slider 403 is fixedly installed on the top of the spring 402 and slidably sleeved on the outer ring of the long connecting rod 30334. A rubber ring 404 that fits the outer surface of the long connecting rod 30334 is fixedly installed on the inner ring of the slider 403. When the scraper mechanism vibrates and drives the adjusting plate 302 to vibrate together, the adjusting plate 302 will transmit the vibration to the lifting mechanism 10 and other components through the support leg 3033.

[0044] When subjected to vibration, the spring 402 on the support 401 undergoes elastic deformation, converting the vibration kinetic energy into elastic potential energy, thereby reducing the impact force directly transmitted to the fixed end. After the vibration energy of the rod is absorbed by the spring 402, the amplitude will be significantly attenuated. As an additional mass, the slider 403's inertia will resist the rapid deformation of the spring 402, slowing down the vibration transmission speed, thereby reducing the transmission rate of high-frequency vibration. The rubber ring 404 increases sliding friction energy dissipation. The sliding friction between the slider 403 and the outer wall of the rod will convert some vibration energy into heat energy for dissipation, further suppressing vibration. When vibration is transmitted through the long rod, the spring 402 first compresses or stretches, consuming some energy. The remaining energy drives the slider 403 to move, further dissipating energy through friction and mass inertia, which can effectively reduce the vibration of the lifting mechanism 10 and its top connecting structure.

[0045] In one embodiment, see Figures 1-4Specifically, the lifting mechanism 10 includes a support frame 101 fixedly connected to the assembly bracket 20. Inside the support frame 101, a set of lead screws 102 are rotatably installed and two sets of auxiliary rods 103 are welded. Two sets of moving blocks 104 are threadedly connected to the lead screws 102. Both sets of moving blocks 104 are connected to the bottom support plate through hinged push rods 105. A drive motor 106 is fixedly installed on one side of the support frame 101. The drive motor 106 is used to control the rotation of the lead screws 102 to drive the two sets of moving blocks 104 to move in opposite directions. The auxiliary rods 103 slide through the two sets of moving blocks 104.

[0046] The support frame 101 passes through the gaps between several sets of support legs 3033, and there is corresponding space for movement between the components. When the drive motor 106 is started, the drive motor 106 drives the lead screw 102 fixedly connected to its output end to rotate. The two sets of symmetrical internal threads on the lead screw 102 can drive the two sets of moving blocks 104 to move in opposite directions. The auxiliary rod 103 provides a stable limit support for the displacement of the moving blocks 104. The two sets of moving blocks 104 can drive the adjustment bracket 30 to adjust up and down through the push rod 105. The lifting structure is stable and reliable and not prone to failure. The overall stability of the equipment operation is strong. When adjusting the height of the scraper, the lifting mechanism 10 can be coarsely adjusted, and the adjustment bracket 30 can be finely adjusted, which facilitates the improvement of the accuracy of scraper height adjustment.

[0047] The assembly bracket 20 includes an assembly plate 201 for fixing to the concrete laser screed machine. The assembly plate 201 is connected to the support frame 101 via a detachable frame rod 202. Two sets of columns 203 that slide through the support plate are welded to the top of the support frame 101. A reinforcing plate 204 is detachably installed between the top of the two sets of columns 203 and the assembly plate 201. The assembly plate 201 has mounting holes to facilitate assembly with the concrete laser screed machine body. The columns 203 provide stable support for the up-and-down sliding of the adjustable bracket 30. All components can be fixedly connected by bolts, which facilitates the subsequent disassembly of the components.

[0048] The connecting bracket 50 includes a frame plate 501 that is bolted to the top support plate. Both ends of the frame plate 501 are welded with sleeves 502. The sleeves 502 are bolted to a vertical rod 503 for supporting the laser receiver 11. The vertical rod 503 is bolted to the sleeves 502. The laser receiver 11 is slidably fitted onto the vertical rod 503. The laser receiver 11 is precisely fixed by rotating the threaded knob, etc. The vertical rod 503 can provide stable support for the laser receiver 11.

[0049] An angle sensor 14 is fixedly installed on the adjustment plate 302. The angle sensor 14 is used to provide real-time feedback of the attitude data of the adjustment plate 302, so that multiple sets of driving components 303 can perform leveling adjustment on the adjustment plate 302. The angle sensor 14 is a status feedback element of the adjustment plate 302. It is mainly used to monitor the attitude (such as pitch angle, etc.) of the adjustment plate 302 and the scraper connected to its bottom in real time, and cooperate with the control system to achieve high-precision motion adjustment or stable control. The sensor collects data → transmits it to the controller (such as PLC, motion control card) → compares it with the target attitude and calculates the error → solves the inverse kinematics and generates the actuator length command → the motor (servo / stepper) adjusts the actuator length → continuous closed-loop feedback until the error approaches zero. When the system starts, the laser receiver 11 and the angle sensor 14 are calibrated to check whether the laser receiver 11 corresponds to the transmitter and whether the platform is in the horizontal reference position, so as to avoid control failure due to initial posture error.

[0050] The lifting structure of the working head of the concrete laser screed machine has high flexibility in actual use, and its compatibility includes:

[0051] Super-flat flooring construction: Meets the FM / FF grade requirements for warehouse and logistics flooring (flatness ≤ 1mm / 3m);

[0052] Tunnel and bridge deck paving: adaptable to combined adjustments of longitudinal slope and lateral superelevation;

[0053] Prefabricated building base: Quickly match the installation reference surface of prefabricated components.

[0054] The content not described in detail in this document is existing technology known to those skilled in the art, and its technical potential can be further explored through AI algorithms, the Internet of Things, etc. (such as predictive modulation).

[0055] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lifting structure for a screed machine work head for controlling the height of a concrete screed blade mechanism, characterised in that, The utility model relates to a concrete laser leveling machine three-dimensional adjustment device, including: Lifting mechanism (10), the lifting mechanism (10) is fixedly installed in the front end of screed machine working head through assembly support (20); Adjusting support (30), the adjusting support (30) includes the support table (301) of up and down sliding installation on the assembly support (20) and the adjusting plate (302) for connecting the blade mechanism, the lifting mechanism (10) is used to drive support table (301) up and down sliding on the surface of assembly support (20), a plurality of drive pieces (303) for controlling the three-dimensional rotation adjustment of adjusting plate (302) are detachably installed on support table (301); Damping assembly (40), a set of damping assembly (40) is detachably installed on each group of drive piece (303), and the damping assembly (40) inhibits the transmission of vibration by absorbing the energy of vibration; Laser receiver (11), two groups of laser receivers (11) are symmetrically arranged left and right and are detachably installed on the top of support table (301) through connecting support (50); The support table (301) includes two groups of support plates for supporting a plurality of drive pieces (303), both groups of support plates are slidingly penetrated through the assembly support (20), the connecting support (50) is detachably installed on the top support plate, and the bottom support plate is connected with the lifting mechanism (10); The lifting mechanism (10) includes a support frame (101) fixedly connected with the assembly support (20), a group of lead screws (102) are rotatably installed in the inside of support frame (101), two groups of auxiliary rods (103) are welded, two groups of moving blocks (104) are threadedly connected on the lead screws (102), the auxiliary rods (103) are slidingly penetrated through the two groups of moving blocks (104), both groups of moving blocks (104) are connected with the bottom support plate through the articulated push rod (105), a drive motor (106) is fixedly installed on one side of support frame (101), and the drive motor (106) is used to control the rotation of lead screw (102) to drive the reverse displacement of the two groups of moving blocks (104); The assembly support (20) includes an assembly plate (201) for being fixed to the concrete laser leveling machine, the assembly plate (201) is connected with the support frame (101) through the detachably installed frame rod (202), two groups of stand columns (203) slidingly penetrated through the support plates are welded on the top of support frame (101), and the top ends of the two groups of stand columns (203) are detachably installed with the reinforcing plate (204) between the assembly plate (201); The connecting support (50) includes a frame plate (501) fixed to the top support plate through bolts, sleeve pipes (502) are welded on the top of both ends of the frame plate (501), and vertical rods (503) for supporting the laser receiver (11) are fixedly installed on the sleeve pipes (502) through bolts.

2. The lift structure for a screed working head of claim 1, wherein: The driving member (303) comprises a servo motor (3031) fixedly installed between the upper and lower support plates, an output end of the servo motor (3031) is fixedly installed with a rotating plate (3032), the rotating plate (3032) is connected with the adjusting plate (302) through detachable supporting legs (3033), and the damping assembly (40) is detachably installed on the supporting legs (3033).

3. The lift structure for a screed working head of claim 2, wherein: The supporting leg (3033) comprises an upper branch (30331) detachably installed on the rotating plate (3032) and a lower branch (30332) detachably installed on the adjusting plate (302), the end portions of the upper branch (30331) and the lower branch (30332) are spherically hinged with short connecting rods (30333), and the upper and lower groups of short connecting rods (30333) are detachably installed with a long connecting rod (30334) provided with the damping assembly (40).

4. The lift structure for a screed working head of claim 3, wherein: The end portion of the short connecting rod (30333) close to the long connecting rod (30334) and the two ends of the long connecting rod (30334) are welded with threaded rods (12), each group of threaded rods (12) is threadedly connected with a fixing nut (13), and the bottom end of the long connecting rod (30334) is detachably installed with the damping assembly (40).

5. The lift structure for a screed working head of claim 4, wherein: The damping assembly (40) comprises a supporting seat (401) threadedly connected with the long connecting rod (30334), the top of the supporting seat (401) is fixedly installed with a spring (402) sleeved on the outer circle of the long connecting rod (30334), the top end of the spring (402) is fixedly installed with a sliding block (403) slidingly sleeved on the outer circle of the long connecting rod (30334), and the inner circle of the sliding block (403) is fixedly installed with a rubber ring (404) abutting the outer surface of the long connecting rod (30334).

6. The lift structure for a screed working head of claim 1, wherein: The adjusting plate (302) is fixedly installed with an inclination sensor (14), the inclination sensor (14) is used for feeding back the posture data of the adjusting plate (302) in real time, so that the multiple driving members (303) can adjust the adjusting plate (302) to be leveled.

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