Synchronous adjusting type pavement cutting equipment

Abstract

The utility model provides synchronous adjusting type road surface cutting equipment which comprises a cutting vehicle body, a linkage adjusting mechanism and a lifting rotating mechanism, a plurality of groups of vertical shaft holes are sequentially formed in a support, a plurality of vertical rotating shafts are installed in the vertical shaft holes in a penetrating mode, a synchronous wheel is installed on each rotating shaft, and a synchronous belt or chain is annularly sleeved on each synchronous wheel. A stepping motor is fixed to the upper side of the support, the lower end of each rotating shaft is connected with a lifting seat through threads, lifting shafts are installed at the lower ends of the lifting seats, bearing seats are installed in vertical sliding grooves in the two side walls of the frame through rails, each lifting shaft is sleeved with the corresponding bearing seat in a penetrating mode, one end of each lifting shaft is provided with an adjustable belt pulley, and the other end of each lifting shaft is provided with a saw blade. The adjacent adjustable belt wheels are in transmission connection through a synchronous belt. According to the road surface cutting device, the problems existing in the aspects of one-time cutting depth, walking speed and cutting efficiency of existing cutting equipment are solved, a road surface is gradually and deeply cut through the multiple saw blades, and the cutting depth of each saw blade can be synchronously adjusted at any time.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete pavement cutting equipment, and in particular relates to synchronously adjustable pavement cutting equipment. Background Art

[0002] Concrete pavement cutting equipment plays an important role in road construction and maintenance. They are used to cut concrete pavement for repairs, diversions, pipeline installation and other work. The use of cutting equipment can ensure the accuracy of cutting lines and the flatness of the road surface, which is crucial for traffic safety and road quality. Fast and efficient cutting equipment can significantly increase construction speed, reduce traffic disruptions and reduce project costs.

[0003] Existing concrete pavement cutting equipment usually adopts a single saw blade or blade design, and the one-time cutting depth is relatively shallow. These devices usually use hydraulic or mechanical systems to control the cutting depth, but the adjustment of the cutting depth usually requires shutdown and manual operation. The cutting speed is relatively slow, which may cause inefficiency for large-area pavement cutting projects. The main manifestations are slow cutting speed: the design of a single saw blade or blade leads to relatively slow cutting speed, especially for large-area projects; inflexible cutting depth adjustment: the adjustment of cutting depth usually requires shutdown and manual operation, which reduces work efficiency; traffic interference: the slower cutting speed may cause traffic interference, especially in projects on urban roads.

[0004] Although the existing concrete pavement cutting equipment performs well in reliability and accuracy, it has disadvantages in cutting speed, cutting depth and adjustment flexibility, which need to be further improved. Utility Model Content

[0005] In view of the problems of small cutting depth and low cutting efficiency in existing concrete pavement cutting equipment, the utility model provides a synchronously adjustable pavement cutting equipment, which improves the cutting depth and cutting efficiency by simultaneously controlling multiple saw blades to cut the concrete pavement deeply from front to back.

[0006] The solution of the utility model to solve the technical problem is: adopt a synchronous adjustable road cutting equipment, including a cutting body, the cutting body at least includes a top plate and left and right side walls, a plurality of pairs of vertical slide grooves are distributed on the left and right side walls of the cutting body, each pair of vertical slide grooves is respectively matched with a pair of bearing seats, each bearing seat can slide vertically in its vertical slide groove; a lifting shaft is installed horizontally through each pair of bearing seats, one end of each lifting shaft is installed with an adjustable pulley, adjacent adjustable pulleys are connected by synchronous belt transmission, and one of the adjustable pulleys is connected with the driving mechanism; a saw blade is installed at the other end of each lifting shaft, the saw blades are collinear front and back, and the cutting depth of each saw blade increases successively from front to back; a linkage adjustment mechanism is installed on the top plate for adjusting the height of each lifting shaft.

[0007] Preferably, the diameters of the saw blades increase gradually from front to back.

[0008] Preferably, the thickness of each saw blade decreases from front to back.

[0009] Preferably, the linkage adjustment mechanism includes a bracket, a stepper motor, a rotating shaft, a synchronous wheel and a lifting seat. There are multiple groups of vertical shaft holes on the bracket from front to back and multiple vertical rotating shafts are installed respectively. A synchronous wheel is installed on the upper end of each rotating shaft. A synchronous chain is ringed on each synchronous wheel. A stepper motor is fixed on the upper side of the bracket to drive the synchronous chain to rotate. The lower end of each rotating shaft is connected with a corresponding lifting seat through a thread. The lower end of each lifting seat passes through the top plate and is installed with the lifting shaft.

[0010] Preferably, a vertical fixing seat is fixed on one side of the cutting vehicle body, and a positioner is installed at the lower end of the fixing seat. The positioner includes a cylindrical main body, a transverse axis is fixed at the center of the main body, and the transverse axis is installed on the bottom of the fixing seat through a bearing or an axle seat. An annular positioning piece extends radially outward from the center of the circumferential surface of the cylindrical main body. During the cutting process, the cylindrical main body rolls on the upper edge of the cutting seam, and the annular positioning piece rolls in the cutting seam, and the annular positioning piece is colinear with each saw blade.

[0011] Preferably, each pulley and each positioner are driven to rotate respectively by an independent driving mechanism, or each pulley and each positioner are driven to rotate simultaneously by the same driving mechanism.

[0012] Preferably, a fixed rotating shaft is installed at the front end of the annular positioning piece through a bearing or a sleeve, a fixed pulley is installed at one end of the fixed rotating shaft, and a fixed saw blade is installed at the other end. The fixed pulley is connected to the adjacent adjustable pulley through a synchronous belt drive, and the saw blades are collinear front and back, and the cutting depth of each saw blade increases successively from front to back.

[0013] Preferably, a tensioning wheel is added to the synchronous belt, and a pressure wheel is installed between adjacent synchronous wheels and on the outside of the synchronous belt. The pressure wheel is a fixed wheel or elastic pressure is added to the rotating shaft of the pressure wheel; or, a tensioning wheel is added between the adjustable pulley and the fixed pulley to tension the belt between the two.

[0014] Preferably, a clamping wheel is installed in the bracket and on one side or both sides of the synchronous chain to clamp the synchronous chain.

[0015] The main goal of the utility model is to solve the problems of existing cutting equipment in one-time cutting depth, travel speed and cutting efficiency. Through multiple saw blades gradually cutting the road surface, and the cutting depth of each saw blade can be adjusted synchronously at any time, it has the following advantages:

[0016] 1. Improve cutting speed and efficiency: By cutting with multiple saw blades at the same time and gradually going deeper, the cutting speed can be significantly increased, thereby improving construction efficiency. This is especially important for large-area pavement cutting projects.

[0017] 2. Precise cutting depth control: The synchronous adjustment mechanism of the equipment allows the cutting depth of each saw blade to be adjusted in real time to adapt to different road conditions. This provides greater flexibility and precision, ensuring the accuracy and consistency of cutting.

[0018] 3. Linear positioning function: The saw blades are in line and use the positioner, so the equipment can maintain linear positioning during the cutting process, which helps to ensure the accuracy and consistency of cutting, especially when cutting long distances.

[0019] 4. Multi-saw blade design: The equipment adopts a multi-saw blade design. The diameter of each saw blade can be adjusted according to needs, or the cutting depth of each saw blade can be controlled by independently adjusting the height of the lifting seat. This diversity can meet the needs of different cutting depths. From front to back, the diameter of each saw blade increases and the thickness decreases. Although the front saw blade is thicker, the cutting depth is small, and although the back saw blade is thinner, the cutting depth is large. This not only overcomes the problem that thin saw blades are not easy to have a deeper cutting volume, but also solves the problem of extra energy consumption and a large amount of dust caused by thicker saw blades when cutting a large depth. Multiple saw blades work together to achieve the best cutting energy efficiency.

[0020] 5. Tensioner and tensioner pulleys: The equipment also uses tensioner and tensioner pulleys to ensure the tension of the synchronous chain, thereby improving the stability and continuity of cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the three-dimensional structural schematic diagrams of the cutting device of the utility model;

[0022] Figure 2 yes Figure 1 A top view of

[0023] Figure 3 This is the second three-dimensional structural schematic diagram of the cutting device of the utility model;

[0024] Figure 4 yes Figure 1 Left view of

[0025] Figure 5 yes Figure 1 Right view of;

[0026] Figure 6 This is the third schematic diagram of the three-dimensional structure of the cutting device of the utility model;

[0027] Figure 7 This is a comparison diagram of saw blades of different sizes.

[0028] Numbers in the figure: cutting body 2; frame 21; dovetail connection groove 22; lifting component 23; traction component 24; fixed seat 25; inner sprocket 26; outer sprocket 27; driving sprocket 28; positioner 29; linkage adjustment mechanism 3; bracket 31; stepping motor 32; rotating shaft 33; synchronous wheel 34; threaded section 35; nut sleeve 36; lifting seat 37; lifting shaft 38; saw blade 39; lifting and rotating mechanism 4; vertical slide groove 41; bearing seat 42; track 43; adjustable pulley 44; fixed pulley 45; synchronous belt 46; fixed rotating shaft 47. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0030] Embodiment 1: A synchronously adjustable road cutting device is mainly used to improve the existing similar cutting devices, which have shallow one-time cutting depth, slow travel speed and low cutting efficiency. After the improvement, the road surface can be cut by gradually deepening multiple saw blades, and the cutting depth of each saw blade can be synchronously adjusted at any time according to the actual situation, so that multiple saw blades can be used simultaneously during the cutting process. The diameter of each saw blade increases and the thickness decreases from front to back. The front saw blade is thicker but the cutting depth is small, and the rear saw blade is thinner but the cutting depth is large. It not only overcomes the problem that thin saw blades are not easy to have a deep cutting amount, but also solves the problem of extra energy consumption and a large amount of dust caused by thicker saw blades when cutting at a large depth. Multiple saw blades cooperate to achieve the best cutting energy efficiency. The rear saw blade gradually cuts deeper along the cutting seam of the front saw blade. The device can increase the cutting speed and thus improve the construction efficiency. The device mainly includes a cutting vehicle body 2, a linkage adjustment mechanism 3 and a lifting and rotating mechanism 4. This synchronously adjustable pavement cutting equipment has significant beneficial effects in terms of increased cutting speed, precise control of cutting depth, linear positioning, multi-saw blade design and tensioning pulley, and it is expected to significantly improve the efficiency and quality of pavement cutting projects.

[0031] Specifically, Figure 1 and Figure 3 As shown, the cutting vehicle body 2 includes a vehicle frame 21, a dovetail connection groove 22, a lifting component 23, a traction component 24, a fixing seat 25, an inner sprocket 26, an outer sprocket 27, a driving sprocket 28 and a positioner 29, etc. Among them, the main part of the vehicle frame 21 at least includes a top plate and two side walls, the upper part of the top plate is provided with a linkage adjustment mechanism 3, and the two side walls are provided with multiple pairs of lifting and rotating mechanisms 4.

[0032] The rear end of the frame 21 is preferably connected to the driving body, and its power comes from the driving body, but it is not excluded that an independent driving mechanism is installed on the frame. For example, one implementation method is as follows Figure 1 As shown, a dovetail connection groove 22 is provided at the rear end of the frame 21, and a corresponding dovetail plate is provided on the driving body to achieve connection. The frame 21 and the driving body can also be connected in other ways, such as direct hanging, buckling and hinged connection. A lifting component 23 and / or a traction component 24 are respectively fixed to the rear and front of the frame 21, so that the lifting mechanism and / or traction mechanism on the driving body can be used to drive the frame 21 to be lifted and / or turned over as a whole.

[0033] About the locator: Figure 1 and 6 As shown, a vertical fixing seat 25 is fixed on one side of the frame 21, and a locator 29 is installed at the lower end of the fixing seat 25. Specifically, the locator 29 includes a cylindrical body, a transverse axis is fixed at the center of which, and the transverse axis is installed at the bottom of the fixing seat 25 through a bearing or an axle seat. An annular locating piece extends radially outward from the center of the circumferential surface of the cylindrical body. During the cutting process, the cylindrical body rolls on the upper edge of the cutting seam, and the annular locating piece rolls inside the cutting seam.

[0034] Furthermore, a driving mechanism for driving the positioner 29 to rotate may be provided, for example, an independent motor for driving the positioner 29 to rotate may be installed on the frame 21 or on the fixed seat 25. Alternatively, an engine located on the driving vehicle body may be used to be connected to the positioner 29 through a transmission mechanism. One way of transmission connection is to install a transverse shaft transversely on the upper side of the fixed seat 25 through a bearing or a sleeve, an inner sprocket 26 is installed on the inner short end of the transverse shaft, an outer sprocket 27 is installed on the outer end of the transverse shaft, the outer sprocket 27 is connected to the driving sprocket 28 on the rotating shaft of the positioner 29 through a chain transmission, and the inner sprocket 26 is connected to the transmission output of the engine on the driving vehicle body.

[0035] Regarding linkage adjustment mechanism 3: Figure 2 and Figure 3As shown, the mechanism includes a bracket 31, a stepper motor 32, a rotating shaft 33, a synchronous wheel 34 and a lifting seat 37. A plurality of vertical shaft holes are sequentially arranged from front to back on the bracket 31, each of which is matched with a vertical rotating shaft 33, and each rotating shaft 33 is equipped with a horizontal synchronous wheel 34, for example Figure 2 and Figure 4 A plurality of synchronous sprockets are shown in FIG. Each synchronous wheel 34 is provided with a synchronous chain, for example Figure 2 and Figure 4 The synchronous chain 97 shown in FIG. A stepper motor 32 is fixed on the upper side of the bracket 31, and the shaft of the stepper motor 32 is connected to one of the rotating shafts 33 (or a sprocket is installed on the rotating shaft of the stepper motor 32, and the sprocket is used to drive the synchronous chain 97 to rotate), so that when the stepper motor 32 rotates, it can drive multiple vertical rotating shafts 33 to rotate at the same time. A clamping wheel 94 is installed in the bracket 31 and on one or both sides of the synchronous chain 97 to clamp the synchronous chain 97. The lower end of each rotating shaft is connected to a corresponding lifting seat 37 by threading, such as Figure 3 In the figure, a threaded section 35 is provided at the lower end of a vertical rotating shaft, and a nut sleeve 36 is provided on the upper side of a lifting seat 37. The threaded section 35 is installed in the nut sleeve 36, so that when the vertical rotating shaft rotates, the lifting seat 37 can be driven to rise or fall.

[0036] like Figure 6 As shown, the lower end of each lifting seat 37 passes through the through hole of the top plate of the frame 21, and is respectively installed with a horizontal lifting shaft 38 through a bearing or a sleeve. When the lifting seat 37 is controlled to rise and fall synchronously, it can drive each lifting shaft 38 to rise and fall synchronously. The number of the vertical rotating shaft 33, the lifting seat 37 and the lifting shaft 38 is not limited. Figure 3 Three groups are shown, but it can also be applied to four or five groups, etc.

[0037] About the lifting and rotating mechanism 4: Figure 1 and Figure 6 As shown, the mechanism includes a vertical slide 41, a bearing seat 42, an adjustable pulley 44, a fixed pulley 45, a synchronous belt 46 and a fixed rotating shaft 47. Among them, multiple pairs of vertical slides 41 are arranged on the two side walls of the frame 21, and a bearing seat 42 is installed in each vertical slide 41 through a track 43, and both ends of each lifting shaft 38 are respectively installed in the corresponding bearing seat 42. An adjustable pulley 44 is installed at one end of each lifting shaft 38, and a saw blade 39 is installed at the other end. Adjacent adjustable pulleys 44 are connected by a synchronous belt 46, and the rearmost adjustable pulley 44 is connected by a driving mechanism.

[0038] In addition, a fixed shaft 47 is installed at the front end of the frame 21 through a bearing or a sleeve, a fixed pulley 45 is installed at one end of the fixed shaft 47, and a saw blade 39 is installed at the other end. The fixed pulley 45 is connected to the adjacent adjustable pulley 44 through a synchronous belt 46. It can be seen that the height of the saw blade 39 located at the end of the fixed shaft 47 cannot be adjusted.

[0039] like Figure 7 As shown, the saw blades are collinear front to back, the cutting depth of each saw blade increases from front to back, the diameter of each saw blade increases from front to back, and the thickness of each saw blade decreases from front to back.

[0040] When the device is working, the engine of the driving vehicle body drives multiple adjustable pulleys 44 and a fixed pulley 45 to drive the transmission, thereby driving multiple saw blades to rotate simultaneously. First, the fixed saw blade on one side of the fixed shaft 47 digs a groove on the concrete floor. When the driving vehicle body pushes the cutting vehicle body 2 to move forward, the positioner falls into the cutting seam. The positioner can ensure that the cutting vehicle body 2 moves forward in a straight line along the cutting seam to achieve the linear positioning function, and then the linkage adjustment mechanism 3 is controlled to make the multiple saw blades located at the rear move downward at the same time and fall into the cutting seam.

[0041] like Figure 5 As shown, the diameters of the multiple saw blades can be designed to be different. For example, the diameters of the saw blades 39A, 39B, 39C, and 39D increase from front to back, so that the cutting depth of each saw blade increases. The heights of the multiple lifting seats 37 can also be adjusted independently in the early stage, so that the heights of the lifting shafts 38 change in sequence, such as decreasing in sequence (the diameters of the saw blades can be the same or different), so that the cutting depth of the saw blades increases in sequence.

[0042] On the basis of the above scheme, a tensioning wheel can be added to the synchronous chain, for example, a pressure wheel is installed between adjacent synchronous wheels and on the outside of the synchronous chain 97, and the pressure wheel is a fixed wheel or an elastic pressure is added to the rotating shaft of the pressure wheel. Alternatively, a tensioning wheel is added between the adjustable pulley 44 and the fixed pulley 45 to tension the belt therebetween, for example, an axle seat is installed on the side wall of the frame 21 through a rotating shaft, a pressure wheel for pressing the belt is installed on the axle seat, and a tension spring is connected between the axle seat and the frame 21, so that the adjustable pulley 44 and the fixed pulley 45 are always in a tensioned state.

[0043] On the basis of the above embodiment, when the synchronous chain is tensioned by the clamping wheel, a tensioning adjustment mechanism may be considered to achieve this. The mechanism is used to independently control the independent rotation of each vertical rotating shaft, and to control the simultaneous rotation of multiple vertical rotating shafts when the transmission chain is in a tensioned state. When rotating independently, the height of each saw blade can be controlled separately, which is suitable for early debugging according to different ground hardness conditions, while when rotating synchronously, the lifting and lowering of multiple saw blades can be controlled simultaneously, which is suitable for synchronous operation of the working process. For example, an adjustment bar hole is horizontally arranged on the panel of the bracket, and an adjustment slider is matched in the adjustment bar hole. At the same time, a screw rod is installed through one side of the adjustment bar hole, and a thread is arranged in the middle of the screw rod and connected with the adjustment flower thread. A tension adjustment knob is installed on the outer end of the screw rod, so that when one or two adjustment knobs are adjusted, the tightness of the ring chain can be adjusted. A tightening knob is installed on each vertical rotating shaft. When the ring chain is in a loose state, each vertical rotating shaft can be adjusted separately, thereby controlling the height of each saw blade separately. When the height of each saw blade is adjusted to the right position, the adjusting knobs are controlled respectively so that the synchronous chain is in a tensioned state, so as to realize the function of synchronously adjusting the height of multiple saw blades at the same time through the rotation of the stepper motor during the working process.

[0044] The main steps of the device in actual working process:

[0045] 1. Preparation:

[0046] Make sure that all parts and mechanisms of the equipment are in normal working condition, including saw blades, linkage adjustment mechanisms, lifting and rotating mechanisms, etc. Check the frame, fixing seat, inner and outer sprockets, drive sprockets, and positioners of the cutting body to ensure that they are firmly connected.

[0047] 2. Set cutting depth:

[0048] According to actual needs, the linkage adjustment mechanism is used to adjust the cutting depth of each saw blade. It can be precisely adjusted according to the road conditions and cutting requirements.

[0049] 3. Positioning and startup:

[0050] Place the machine on the road surface to be cut, make sure the positioner is in the correct position and can roll accurately. Start the machine's engine to drive the adjustable pulley and fixed pulley, which will drive the multiple saw blades to start rotating.

[0051] 4. Linear positioning:

[0052] Through the role of the positioner, it is ensured that the cutting body can maintain a straight line positioning during the cutting process and move forward in a straight line along the cutting seam.

[0053] 5. Cutting process:

[0054] As the cutting vehicle body moves forward, while the driving vehicle body is pushed (or driven independently) and moves forward, the engine driving the vehicle body simultaneously drives multiple pulleys to rotate and then drives multiple saw blades to rotate simultaneously. Each saw blade gradually penetrates into the road surface, and while cutting the road surface, ensure that the cutting depth of each saw blade is adjusted synchronously.

[0055] 6. Monitor and adjust:

[0056] During the cutting process, the operating status of the equipment is constantly monitored, especially the cutting depth of each saw blade. If the cutting depth or other parameters need to be adjusted, they can be adjusted in real time through the linkage adjustment mechanism.

[0057] 7.Complete the cutting task:

[0058] After the cut is complete, stop the machine's engine and wait for the saw blade to stop rotating completely. Remove the machine from the cutting area to ensure a safe and clean work area.

[0059] 8. Maintenance and care:

[0060] Regularly perform maintenance and service on the equipment, including cleaning the saw blade, lubricating mechanical parts, and checking the operating status of the linkage adjustment mechanism.

[0061] The above are the main steps for using synchronous adjustable pavement cutting equipment. Make sure to follow the safe operating procedures when operating the equipment and adjust the steps according to actual conditions.

[0062] The above specific implementations of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A synchronously adjustable road cutting device, comprising a cutting vehicle body (2), characterized in that: The cutting vehicle body (2) comprises at least a top plate and left and right side walls. A plurality of pairs of vertical slide grooves (41) are distributed on the left and right side walls of the cutting vehicle body (2). A pair of bearing seats (42) are respectively matched and mounted in each pair of vertical slide grooves (41). Each bearing seat (42) can slide vertically in its vertical slide groove (41). A lifting shaft (38) is installed transversely through each pair of bearing seats (42), and an adjustable pulley (44) is installed at one end of each lifting shaft (38). Adjacent adjustable pulleys (44) are connected to each other through a synchronous belt (46), and one of the adjustable pulleys (44) is connected to the driving mechanism. A saw blade (39) is mounted at the other end of each lifting shaft (38), the saw blades are collinear front to back, and the cutting depth of each saw blade increases from front to back; A linkage adjustment mechanism (3) is installed on the top plate for adjusting the height of each lifting shaft (38).

2. The synchronously adjustable road cutting device according to claim 1, characterized in that: The diameters of the saw blades increase from front to back.

3. The synchronously adjustable road cutting device according to claim 1, characterized in that: The thickness of each saw blade decreases from front to back.

4. The synchronously adjustable road cutting device according to claim 1, characterized in that: The linkage adjustment mechanism (3) comprises a bracket (31), a stepper motor (32), a rotating shaft (33), a synchronous wheel (34) and a lifting seat (37). The bracket (31) is provided with a plurality of groups of vertical shaft holes from front to back and a plurality of vertical rotating shafts (33) are respectively penetrated and installed. A synchronous wheel (34) is installed at the upper end of each rotating shaft (33). A synchronous chain (97) is sleeved on each synchronous wheel (34). A stepper motor (32) is fixed on the upper side of the bracket (31) for driving the synchronous chain (97) to rotate. A corresponding lifting seat (37) is connected to the lower end of each rotating shaft by a thread. The lower end of each lifting seat (37) penetrates the top plate and is installed with the lifting shaft (38).

5. The synchronously adjustable road cutting device according to claim 1, characterized in that: A vertical fixing seat (25) is fixed on one side of the cutting vehicle body (2), and a positioner (29) is installed at the lower end of the fixing seat (25). The positioner (29) includes a cylindrical main body, a transverse axis is fixed at the center of the main body, and the transverse axis is installed on the bottom of the fixing seat (25) through a bearing or an axle seat. An annular positioning piece extends radially outward from the center of the circumferential surface of the cylindrical main body. During the cutting process, the cylindrical main body rolls on the upper edge of the cutting seam, while the annular positioning piece rolls in the cutting seam, and the annular positioning piece is colinear with each saw blade.

6. The synchronously adjustable road cutting device according to claim 5, characterized in that: Each pulley and the positioner (29) are driven to rotate respectively by an independent driving mechanism, or each pulley and the positioner (29) are driven to rotate simultaneously by the same driving mechanism.

7. The synchronously adjustable road cutting device according to claim 1, characterized in that: A fixed rotating shaft (47) is installed at the front end of the annular positioning piece via a bearing or a sleeve, a fixed belt pulley (45) is installed at one end of the fixed rotating shaft (47), and a fixed saw blade is installed at the other end, the fixed belt pulley (45) is connected to an adjacent adjustable belt pulley (44) via a synchronous belt (46), the saw blades are collinear front and back, and the cutting depth of each saw blade increases from front to back.

8. The synchronously adjustable road cutting device according to claim 7, characterized in that: A tensioning wheel is added to the synchronous belt, and a pressure wheel is installed between adjacent synchronous wheels and on the outside of the synchronous belt. The pressure wheel is a fixed wheel or an elastic pressure is added to the rotating shaft of the pressure wheel; or, between the adjustable pulley (44) and the fixed pulley (45), a tensioning wheel is added to tension the belt between the two.

9. The synchronously adjustable road cutting device according to claim 4, characterized in that: A clamping wheel (94) is installed in the bracket (31) and located on one side or both sides of the synchronous chain (97) for clamping the synchronous chain (97).

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