A screed paving machine and a screed leveling mechanism thereof

Abstract

The utility model discloses a kind of flatting height-adjusting mechanism of slipform paver and slipform paver, including fixed body, sliding body, screw shaft, sprocket chain mechanism and fixed frame;Fixed body is located in the upper portion of fixed frame, screw shaft is rotatably installed on the upper end of fixed body by bearing assembly, sliding body is slidably arranged in the lower portion of fixed frame and the lower end of sliding body is connected with flatting beam, fixed body and sliding body are connected by screw shaft and form screw thread transmission cooperation;The power input end of sprocket chain mechanism is connected with driving element, and the power output end is connected with screw shaft, to drive screw shaft to rotate and realize flatting beam height-adjusting;Rotary hinge pin is installed on fixed body, rotary hinge pin is rotatably installed on height-adjusting frame, and height-adjusting frame is connected with fixed frame;Two adjusting bolts are symmetrically arranged on the both sides of fixed body, and the extension length of adjusting bolt is adjusted, to push fixed body to tilt around rotary hinge pin, and then drive flatting beam to tilt synchronously to adjust elevation angle.The utility model is easy to operate, and operation efficiency is high.

Description

Technical Field

[0001] This utility model relates to a leveling and height adjustment mechanism for a slipform paver and a slipform paver, belonging to the technical field of road construction machinery. Background Technology

[0002] The smoothing beam of the slipform paver is assembled at the rear of the machine mold. By swinging back and forth along the road surface, it can complete the slurry lifting and rolling operations of the concrete pavement. Its height adjustment is directly related to the precise control of the thickness of the concrete slurry layer, which is a key link to ensure that the core construction indicators such as road surface smoothness and density meet the standards.

[0003] Existing leveling devices generally use a screw-type structure to achieve height adjustment, such as... Figure 1 As shown, its operation process has obvious defects: before adjustment, the locking nut 1 on the upper part of the mechanism must be loosened, and then the stud must be manually turned with a wrench. The lower sliding part is raised and lowered by means of thread transmission, which in turn drives the height adjustment of the leveling beam. After adjustment, the locking nut 1 must be tightened again to lock the position. More importantly, during the adjustment process, the entire weight of the leveling beam acts directly on the threaded pair of the height adjustment mechanism, resulting in extremely high resistance to the rotation of the stud. The height adjustment operation is particularly laborious. When adjusting upward, the problem is even more pronounced because additional work needs to be done to overcome its own weight. At the same time, the repeated loosening and tightening of the locking nut 1 not only increases the complexity of the process, but also significantly prolongs the time required for a single adjustment. The overall operation efficiency is low and it is difficult to meet the high-efficiency requirements of road construction. Summary of the Invention

[0004] In view of the problems existing in the prior art, this utility model provides a leveling and height adjustment mechanism for a slipform paver and a slipform paver, which improves the convenience of operation.

[0005] To achieve the above objectives, this utility model employs a leveling and height adjustment mechanism for a slipform paver, comprising a fixed body, a sliding body, a lead screw shaft, a sprocket and chain mechanism, and a fixed frame; The fixed body is located on the upper part of the fixed frame. The lead screw is rotatably mounted on the upper end of the fixed body through a bearing assembly. The sliding body is slidably disposed on the lower part of the fixed frame and the lower end of the sliding body is connected to the leveling beam. The fixed body and the sliding body are connected by a threaded transmission through the lead screw. Rotating the lead screw can drive the sliding body to rise and fall along the axial direction of the fixed body to adjust the height of the leveling beam. The power input end of the sprocket and chain mechanism is connected to the drive element, and the power output end is connected to the lead screw shaft to drive the lead screw shaft to rotate and adjust the height of the leveling beam. A rotating pin is installed on the fixed body, and the rotating pin is rotatably mounted on the height adjustment frame, which is connected to the fixed frame. Two adjusting bolts are symmetrically arranged on both sides of the fixed body. Adjusting the extension length of the adjusting bolts will push the fixed body to tilt around the rotating pin, thereby causing the leveling beam to tilt synchronously to adjust the elevation angle.

[0006] As an improvement, the bearing assembly consists of two tapered roller bearings arranged symmetrically vertically.

[0007] As an improvement, the sprocket and chain mechanism includes a driving sprocket, a driven sprocket, and a transmission chain. The driving sprocket is connected to the output shaft of the driving element, the driven sprocket is connected to the upper end of the lead screw shaft, and the transmission chain is meshed and sleeved on the driving sprocket and the driven sprocket to realize the power transmission between the driving element and the lead screw shaft.

[0008] As an improvement, the top of the lead screw shaft is provided with a manual adjustment position, which is an external hexagonal structure, an internal hexagonal hole structure, or a boss structure with a wrench slot, used to manually rotate the lead screw shaft to adjust the height of the flattening beam when the drive element fails or is powered off.

[0009] As an improvement, a height indicator is also included, which is fixedly mounted on a bending plate and connected to a sliding body. The scale surface of the height indicator faces the operating side. The height indicator cooperates with an indicator rod mounted on a fixed frame to display the height of the leveling beam.

[0010] As an improvement, an angle marker is also included, which is fixed on the height adjustment frame. An angle pointer is fixed on the rotating pin, and the pointing end of the angle pointer is adapted to the scale surface of the angle marker to indicate the elevation angle of the leveling beam in real time.

[0011] As an improvement, a threaded nut is fixed on the fixed frame, and the adjusting bolt is threadedly connected to the threaded nut. Rotating the adjusting bolt allows it to extend and retract axially along the threaded nut to push against the fixed body.

[0012] In a second aspect, this utility model also provides a slipform paver, on which the slipform paver leveling and height adjustment mechanism is installed.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. Reduced adjustment resistance and simplified operation. In existing technology, the weight of the flattening beam acts entirely on the threaded pair, resulting in high rotational resistance and requiring repeated tightening and loosening of the nut. This invention, through the screw shaft and bearing assembly, converts sliding friction into rolling friction, significantly reducing resistance. At the same time, it eliminates the need for tightening the nut, reduces redundant steps, and makes operation easier.

[0014] 2. Achieve automatic height adjustment and improve efficiency. Existing technology relies on manual wrench adjustment, which takes several minutes each time; this utility model uses a sprocket and chain mechanism and drive components to form an automatic transmission system, which eliminates the need for manual intervention in core adjustments, shortens the time for each height adjustment, and is suitable for continuous construction needs.

[0015] 3. Added elevation angle adjustment to adapt to diverse working conditions. Existing technology can only adjust the height, which can easily lead to uneven slurry distribution in special working conditions (such as road cross slopes and edges). This utility model can push the fixed body to tilt by rotating the pin shaft and symmetrical adjusting bolts, thereby driving the leveling beam to adjust the elevation angle, ensuring uniform slurry distribution and guaranteeing construction quality.

[0016] 4. Enhanced stability and improved adjustment accuracy. Existing technologies are prone to accuracy deviations due to structural misalignment. This invention achieves a stable structure through fixed frame positioning and height adjustment frame support. Combined with the precise coordination of bearings and sprockets, it provides high accuracy in height and elevation angle adjustment, meeting the requirements of high-grade road surfaces.

[0017] 5. Strong compatibility and reduced operating costs. Upgrading existing equipment requires modification of core components, which is costly; this utility model does not require changes to the main structure of the paver, and can be assembled simply by replacing the original height adjustment mechanism. Moreover, the components are standardized, making subsequent maintenance convenient and reducing the cost of modification and the entire life cycle. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the original height adjustment mechanism; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a rear view of the present invention; In the diagram: 1. Locking nut, 2. Fixed body, 3. Sliding body, 4. Drive element, 5. Chain and sprocket mechanism, 6. Tapered roller bearing, 7. Lead screw shaft, 8. Adjusting bolt, 9. Rotating pin shaft, 10. Height indicator, 11. Angle indicator, 12. Lead screw nut seat, 13. Fixed frame, 14. Height adjustment frame, 15. Indicator rod. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this application will be described in detail below through specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0021] like Figure 2 and Figure 3As shown, a leveling and height adjustment mechanism for a slipform paver includes a fixed body 2, a sliding body 3, a lead screw shaft 7, a sprocket and chain mechanism 5, and a fixed frame 13. Through the coordinated operation of each component, the height and elevation angle of the leveling beam can be adjusted to meet the diverse needs of road construction. The fixed body 2 is installed on the upper part of the fixed frame 13. The lead screw 7 is rotatably assembled on the upper end of the fixed body 2 through the bearing assembly. The bearing assembly can bear the axial force transmitted to the lead screw 7 by the flattening beam, which transforms the sliding friction of the traditional threaded pair into rolling friction, greatly reducing the rotation resistance of the lead screw 7 and solving the problem of laborious adjustment in the traditional mechanism. The sliding body 3 is slidably disposed at the lower part of the fixed frame 13 and the lower end of the sliding body 3 is connected to the leveling beam, ensuring that the sliding body 3 can synchronously drive the leveling beam to move stably when it rises and falls; the fixed body 2 and the sliding body 3 are connected by a screw shaft 7 to form a threaded transmission. Rotating the screw shaft 7 can drive the sliding body 3 to rise and fall smoothly along the axis of the fixed body 2, thereby realizing the precise adjustment of the height of the leveling beam. The power input end of the sprocket and chain mechanism 5 is connected to the output shaft of the drive element 4 (such as a servo motor or hydraulic motor), and the power output end is connected to the upper end of the lead screw shaft 7. By outputting power through the drive element 4, the lead screw shaft 7 can be directly driven to rotate automatically without manual operation with a wrench. At the same time, it eliminates the process of adjusting the front loose nut and adjusting the rear tight nut of the traditional mechanism, which significantly improves the efficiency of adjusting the height of the smoothing beam and can better adapt to the working conditions of continuous operation of the slipform paver. A rotating pin 9 is welded to one side of the fixed body 2. The rotating pin 9 is rotatably mounted on the height adjustment frame 14, and the height adjustment frame 14 is bolted to the fixed frame 13, providing a stable support foundation for the tilting action of the fixed body 2 and preventing structural swaying or displacement when adjusting the elevation angle. Two adjusting bolts 8 are symmetrically arranged on both sides of the fixed body 2. Adjusting the extension length of the adjusting bolts 8 can push the fixed body 2 to tilt around the rotating pin 9, thereby causing the leveling beam to tilt synchronously to adjust the elevation angle. Compared with the traditional mechanism that can only adjust the height, this utility model adds an elevation angle adjustment function, which can adapt to special working conditions such as road cross slope and edge construction, ensuring that the leveling beam forms the optimal contact angle with the concrete surface and improving the uniformity of grouting and rolling.

[0022] In some embodiments, such as Figure 2As shown, the bearing assembly consists of two tapered roller bearings 6 arranged symmetrically in the upper and lower parts. The two tapered roller bearings 6 are respectively embedded in the bearing holes at the upper end of the fixed body 2 and are symmetrically distributed along the axial direction of the lead screw shaft 7. The inner ring of the bearings 6 is interference-fitted with the upper end shaft section of the lead screw shaft 7, and the outer ring is tightly fitted with the bearing holes of the fixed body 2. This installation structure can provide bidirectional positioning support for the lead screw shaft 7, which can stably bear the axial gravity transmitted by the leveling beam through the sliding body 3 and the lead screw shaft 7, and can also counteract the reverse axial tension generated by the vibration of the leveling beam during operation. This prevents the lead screw shaft 7 from tilting or jamming due to uneven force, and significantly improves the smoothness of the rotation of the lead screw shaft 7.

[0023] In some embodiments, the sprocket and chain mechanism 5 includes a driving sprocket, a driven sprocket, and a transmission chain. The driving sprocket is coaxially fixed to the output shaft of the drive element 4 via a flat key, and the tooth end face of the driving sprocket is fitted and limited by the shoulder of the output shaft of the drive element 4. The driven sprocket is coaxially fixed to the upper shaft section of the lead screw shaft 7 via a flat key, and the driven sprocket is located above the bearing assembly at the upper end of the fixed body 2, and is staggered from the driving sprocket in the horizontal direction to avoid interference. The transmission chain is meshed and sleeved on the teeth of the driving sprocket and the driven sprocket, and the chain tension is adapted by the position adjustment structure of the driving sprocket (such as the elongated hole of the mounting base of the drive element 4). This structure can realize the efficient transmission of power from the drive element 4 to the lead screw shaft 7, with high transmission efficiency, and the rigidity of the chain drive can avoid slippage, ensuring that the speed of the lead screw shaft 7 is accurately matched with the output speed of the drive element 4, and improving the uniformity of the height adjustment of the flattening beam.

[0024] In some embodiments, the top of the lead screw shaft 7 is provided with a manual adjustment position. This manual adjustment position is located at the center of the top end face of the lead screw shaft 7 and protrudes above the driven sprocket to avoid interference with the sprocket and chain mechanism 5. Specifically, it is an external hexagonal structure, an internal hexagonal hole structure, or a boss structure with a wrench slot. The opposite side distance of the external hexagonal structure is adapted to the specifications of commonly used open-end wrenches, the internal hexagonal hole structure is adapted to standard internal hexagonal wrenches, and the boss structure with a wrench slot can be engaged by a special wrench slot. In the event of a failure of the drive element 4 or a power outage, the operator can quickly find the adjustment position without disassembling any parts and manually rotate the lead screw shaft 7 with the corresponding wrench to realize emergency adjustment of the height of the leveling beam, ensuring that the construction process is not interrupted and improving the emergency fault tolerance capability of the equipment.

[0025] In some embodiments, such as Figure 3As shown, it also includes a height marker 10, which is connected to the side of the sliding body 3 via a bending plate. The scale surface of the height marker 10 faces the operating side (corresponding to the operator's standing position). One end of the indicator rod 15, which is installed on the fixed frame 13, is welded and fixed to the side of the fixed frame 13, and the other end extends horizontally to one side of the scale surface of the height marker 10. When the two work together, the sliding body 3 drives the height marker 10 to rise and fall. The scale value pointed to by the indicator rod 15 is the real-time height of the leveling beam. The operator can read it intuitively without bending over or using tools, avoiding the error of estimating the height based on experience in the traditional way, and improving the accuracy of height adjustment.

[0026] In some embodiments, such as Figure 3 As shown, it also includes an angle marker 11, which is fixed to the side of the height adjustment frame 14 facing the operation side by countersunk bolts, and its center coincides with the axis of the rotating pin 9; an angle pointer is fixed on the rotating pin 9, and the angle pointer extends to one side of the scale surface of the angle marker 11 (without contacting the scale surface); the pointing end of the angle pointer is adapted to the scale surface of the angle marker 11. When the fixed body 2 tilts around the rotating pin 9 to adjust the elevation angle of the leveling beam, the angle pointer rotates synchronously with the rotating pin 9 and points to the corresponding scale in real time. The operator can intuitively read the elevation angle value, avoiding the error of traditional adjustment by feel, ensuring consistent elevation angle adjustment accuracy, and helping to improve the quality of road construction.

[0027] In some embodiments, such as Figure 2 , Figure 3 As shown, a threaded female seat 12 is fixedly mounted on the fixed frame 13. The threaded female seat 12 is fixed to the fixed frame 13 by bolts or welding to ensure stable installation. The adjusting bolt 8 is threadedly connected to the threaded female seat 12. Rotating the adjusting bolt 8 can make it extend and retract smoothly along the axial direction of the threaded female seat 12, thereby pushing the fixed body 2. This structure does not require complicated assembly and can realize the extension and retraction of the adjusting bolt 8 through threaded engagement, providing a stable thrust for the fixed body 2 to tilt around the rotating pin 9, ensuring that the elevation angle adjustment is controllable.

[0028] In a second aspect, this utility model also provides a slipform paver. The slipform paver's rear working area, corresponding to the installation position of the leveling beam, is equipped with the slipform paver leveling and height adjustment mechanism. This mechanism is connected to the paver frame via a fixed frame 13, and the lower end of the sliding body 3 is rigidly connected to the paver's leveling beam. The mechanism can be used to directly achieve precise height adjustment and flexible adaptation of the leveling beam's elevation angle without modifying the paver's main structure, thus greatly improving its adaptability to road construction.

[0029] The working process of the leveling and height adjustment mechanism of the above slipform paver: I. Adjusting the workflow at a high level Automated adjustment: Start drive element 4, power is transmitted to lead screw shaft 7 through sprocket and chain mechanism 5, driving lead screw shaft 7 to rotate around the bearing assembly (such as tapered roller bearing 6) at the upper end of fixed body 2; lead screw shaft 7 is threadedly engaged with sliding body 3, driving sliding body 3 and connected leveling beam to rise and fall; during adjustment, height label 10 moves with sliding body 3, indicator rod 15 points to the scale to provide real-time height feedback, and operator controls drive element 4 to start and stop to complete precise positioning.

[0030] Emergency manual adjustment: In case of failure of drive element 4 or power failure, use the adapter wrench to engage the manual adjustment position at the top of the lead screw shaft 7, manually rotate the lead screw shaft 7 to drive the leveling beam to rise and fall, and read the height by combining the height label 10 and the indicator rod 15 to ensure that the construction is not interrupted.

[0031] II. Elevation Angle Adjustment Workflow When special working conditions need to be adapted, rotate the adjusting bolts 8 on both sides of the fixed body 2: the adjusting bolts 8 are threaded with the nut seat 12 on the fixed frame 13, and the fixed body 2 is pushed and extended; the fixed body 2 is rotatably connected to the height adjustment frame 14 through the rotating pin 9, and tilts around the rotating pin 9, which drives the lead screw shaft 7, the sliding body 3 and the leveling beam to tilt synchronously; with the angle mark 11, the angle pointer points to the scale as the rotating pin 9 rotates, and the operator reads the elevation angle value to ensure the adjustment accuracy and make the leveling beam fit the concrete surface.

[0032] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this utility model and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

Claims

1. A leveling and height adjustment mechanism for a slipform paver, characterized in that, Includes a fixed body, a sliding body, a lead screw shaft, a sprocket and chain mechanism, and a fixed frame; The fixed body is located on the upper part of the fixed frame. The lead screw is rotatably mounted on the upper end of the fixed body through a bearing assembly. The sliding body is slidably disposed on the lower part of the fixed frame and the lower end of the sliding body is connected to the leveling beam. The fixed body and the sliding body are connected by a threaded transmission through the lead screw. Rotating the lead screw can drive the sliding body to rise and fall along the axial direction of the fixed body to adjust the height of the leveling beam. The power input end of the sprocket and chain mechanism is connected to the drive element, and the power output end is connected to the lead screw shaft to drive the lead screw shaft to rotate and adjust the height of the leveling beam. A rotating pin is installed on the fixed body, and the rotating pin is rotatably mounted on the height adjustment frame, which is connected to the fixed frame. Two adjusting bolts are symmetrically arranged on both sides of the fixed body. Adjusting the extension length of the adjusting bolts will push the fixed body to tilt around the rotating pin, thereby causing the leveling beam to tilt synchronously to adjust the elevation angle.

2. The leveling and height adjustment mechanism for a slipform paver according to claim 1, characterized in that, The bearing assembly consists of two tapered roller bearings arranged symmetrically vertically.

3. The leveling and height adjustment mechanism for a slipform paver according to claim 1, characterized in that, The sprocket and chain mechanism includes a driving sprocket, a driven sprocket, and a transmission chain. The driving sprocket is connected to the output shaft of the drive element, and the driven sprocket is connected to the upper end of the lead screw shaft. The transmission chain is meshed and sleeved on the driving sprocket and the driven sprocket to realize the power transmission between the drive element and the lead screw shaft.

4. The leveling and height adjustment mechanism for a slipform paver according to claim 3, characterized in that, The top of the lead screw shaft is provided with a manual adjustment position, which is an external hexagonal structure, an internal hexagonal hole structure, or a boss structure with a wrench slot. It is used to manually rotate the lead screw shaft to adjust the height of the flattening beam when the drive element fails or the power is cut off.

5. The leveling and height adjustment mechanism for a slipform paver according to claim 1, characterized in that, It also includes a height indicator, which is fixedly mounted on a bending plate. The bending plate is fixedly connected to the sliding body, and the scale surface of the height indicator faces the operating side. The height indicator cooperates with an indicator rod installed on a fixed frame to display the height of the leveling beam.

6. The leveling and height adjustment mechanism for a slipform paver according to claim 1, characterized in that, It also includes an angle marker, which is fixed on the height adjustment frame. An angle pointer is fixed on the rotating pin, and the pointing end of the angle pointer is adapted to the scale surface of the angle marker to indicate the elevation angle of the leveling beam in real time.

7. The leveling and height adjustment mechanism for a slipform paver according to claim 1, characterized in that, The fixing frame is fixedly equipped with a threaded nut seat. The adjusting bolt is threadedly connected to the threaded nut seat. Rotating the adjusting bolt can cause the adjusting bolt to extend or retract along the axial direction of the threaded nut seat to push the fixing body.

8. A slipform paver, characterized in that, The slipform paver is equipped with a slipform paver leveling and height adjustment mechanism as described in any one of claims 1-7.

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