Road cutting and grooving device

Abstract

The present invention relates to a road surface cutting and grooving device, belonging to the technical field of road repair. It comprises: a mobile chassis, an adsorption and filtration unit, and a grooving unit. The grooving unit is arranged on the mobile chassis and powered by a power unit. The grooving unit comprises: a support frame connected to the mobile chassis; a grinding arm, one end of which is rotatably connected to the support frame; a detection assembly, arranged on the grinding arm, for detecting the position of the road surface groove; a pre-tightening mechanism, connected between the grinding arm and the mobile chassis or the support frame, for providing a preset initial position for the grinding arm; a driving mechanism, for selectively engaging with the grinding arm to drive it to swing, or disengaging from the grinding arm to allow the grinding arm to swing freely under the action of the pre-tightening mechanism, thereby moving in accordance with the shape of the road surface groove. The present invention provides a road surface cutting and grooving device, which greatly reduces the labor intensity of workers, improves work efficiency and work quality, and greatly reduces the damage caused to workers by dust.

Description

Technical Field

[0001] The invention relates to a road surface cutting and grooving device, belonging to the technical field of road repair. Background Art

[0002] Concrete pavements, due to their high bearing capacity, excellent stability, and long service life, are widely used in critical infrastructure such as highways and airport runways. However, under the long-term coupling of vehicle loads and the natural environment (such as temperature and humidity fluctuations), concrete pavement slabs inevitably develop cracks and other defects. If not repaired promptly, they will seriously affect the service performance and driving safety of the road.

[0003] For repairing cracks in concrete pavements, the traditional "rectangular grooving" method has been gradually eliminated because it cuts off a large amount of intact pavement materials, resulting in a waste of resources, and its 90-degree right angle is very likely to cause stress concentration, leading to secondary cracking in the repair area.

[0004] Currently, the industry's leading and mainstream repair technique uses the "tangent approximation" method for grooving. The core concept of this method is to use a series of short, straight-line cuts to approximate the true path of an irregular crack, ultimately forming a polygonal groove that closely follows the contours of the defect. This approach maximizes the preservation of healthy concrete and significantly improves the durability of the repair. In practice, a twin-saw blade cutter is typically used to cut along the planned path, forming the two side walls of the groove. Excess concrete is then broken up and removed from the groove.

[0005] However, after the grooving is completed, in order to further eliminate the stress concentration point on the upper edge of the groove, prevent the corners from peeling off when the vehicle is running over, and enhance the bonding effect of the new and old materials, the upper edge of the groove must be chamfered or rounded.

[0006] The inventors discovered that the prior art has the following technical problems in this key link:

[0007] In the existing technology, the chamfering process relies entirely on manual operation. Workers usually use portable angle grinders to grind along the edge of the groove. This purely manual operation method leads to the following:

[0008] High labor intensity and low work efficiency: Workers need to maintain a bent posture for a long time and perform delicate operations with a vibrating angle grinder. The labor intensity is extremely high and they are prone to fatigue, which directly leads to low overall construction efficiency and prolonged road closure and maintenance time.

[0009] Unstable processing quality: Since it relies entirely on the workers' experience and touch, the depth, width and angle of the chamfer are difficult to ensure uniformity, resulting in uneven quality of the finished product, affecting the final repair effect and aesthetics.

[0010] There are safety and health risks: Angle grinder operations generate a lot of dust, noise and sparks, posing a threat to workers' health and site safety. Summary of the Invention

[0011] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a road surface cutting and grooving device, which greatly reduces the labor intensity of workers, improves work efficiency and work quality, and greatly reduces the damage caused by dust to workers.

[0012] The road surface cutting and grooving device of the present invention comprises:

[0013] Mobile chassis;

[0014] The adsorption and filtration unit is installed on the mobile chassis and is used to absorb and filter the dust generated during the groove repair process;

[0015] A power unit is provided on the mobile chassis;

[0016] The groove repair unit is mounted on a mobile chassis and powered by a power unit. The groove repair unit includes:

[0017] a support frame connected to the mobile chassis;

[0018] a grinding arm, one end of which is rotatably connected to the support frame;

[0019] A detection assembly, mounted on the grinding arm, for detecting the position of the road surface notch;

[0020] A pre-tightening mechanism is connected between the grinding arm and the mobile chassis or support frame, and is used to provide a preset initial position for the grinding arm;

[0021] The driving mechanism is used to selectively engage with the grinding arm to drive the grinding arm to swing, or disengage from the grinding arm to allow the grinding arm to swing freely under the action of the pre-tightening mechanism, thereby moving following the shape of the road surface groove.

[0022] Furthermore, the grinding arm comprises:

[0023] A rotating frame, one end of which is rotatably connected to the supporting frame;

[0024] a lower pressure frame on which the detection assembly is mounted;

[0025] The grinding head is driven by a hydraulic motor and mounted on the lower press frame;

[0026] The parallelogram linkage mechanism is connected between the rotating frame and the lower pressure frame to ensure that the lower pressure frame maintains a stable posture during the lifting process;

[0027] The lifting drive member is used to drive the lower pressing frame to move up and down relative to the rotating frame.

[0028] Furthermore, the lifting drive component is a hydraulic cylinder, which is hinged between the rotating frame and the lower pressure frame.

[0029] Furthermore, the detection assembly is installed on the lower pressure frame and is located at an end away from the hydraulic motor.

[0030] Furthermore, the driving mechanism includes:

[0031] a gear ring, fixed to the turret of the grinding arm;

[0032] a rack movably mounted on the support frame;

[0033] A translation assembly, used to drive the rack to move laterally so that the rack engages or disengages with the gear ring;

[0034] The driving source is used to drive the rack to reciprocate when the rack is engaged with the gear ring, thereby driving the grinding arm to swing.

[0035] Furthermore, the driving source is an electric cylinder, which is hinged between the support frame and the rack.

[0036] Furthermore, the support frame includes two parallel positioning plates, and the rack is slidably arranged between the two positioning plates.

[0037] Furthermore, the translation component includes:

[0038] A telescopic cylinder is connected to the support frame;

[0039] A pushing mechanism is connected to the output end of the telescopic cylinder, and the pushing mechanism includes at least one shift fork for pushing the rack to move laterally;

[0040] The reset assembly is used to make the rack rest against the fork and maintain it in a preset position when the telescopic cylinder is not in action.

[0041] Furthermore, the rotating frame of the grinding arm is mounted on the support frame via a rotating assembly, and the rotating assembly includes:

[0042] A fixed shaft, the key of which is connected to the support frame;

[0043] The radial bearing is mounted on the fixed shaft, and the rotating frame is mounted on the outer ring of the radial bearing;

[0044] Axial bearings are used to support the axial load of the rotating frame.

[0045] Furthermore, the pre-tightening mechanism is a tension spring assembly, which includes a tension spring, two ends of which are respectively connected to the grinding arm and the movable chassis.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] This invention utilizes an integrated mechanized design to transform the chamfering process from a purely manual operation to an automated or semi-automated one. Operators no longer need to bend over and hold a heavy angle grinder for extended periods; they simply operate the equipment, significantly reducing labor intensity. The grinding arm's ability to automatically follow the notch ensures consistent and efficient operation, significantly shortening construction cycles and reducing road closure times.

[0048] This invention uses a detection assembly to sense the notch position in real time, while a preload mechanism and drive mechanism precisely control the posture and movement of the grinding arm. A parallelogram linkage ensures a constant posture of the grinding head during operation, enabling standardized and uniform processing of chamfer depth, width, and angle. This overcomes the subjectivity and instability of manual operation, ensures highly consistent finished product quality, effectively eliminates stress concentration, and improves the durability and aesthetics of the repaired area.

[0049] The present invention incorporates an adsorption and filtration unit that absorbs and filters dust generated at the source during grinding operations. This significantly reduces dust concentration at the construction site, creating a safer and healthier working environment for operators and effectively avoiding occupational health risks associated with long-term dust inhalation. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is one of the structural diagrams of an embodiment of the present invention;

[0051] Figure 2 This is the second structural diagram of an embodiment of the present invention;

[0052] Figure 3 2 is a schematic structural diagram of a groove repair unit according to an embodiment of the present invention;

[0053] Figure 4 Schematic diagram of the grinding arm structure of an embodiment of the present invention;

[0054] Figure 5 This is a front view of a groove repair unit according to an embodiment of the present invention;

[0055] Figure 6 yes Figure 5 Full cross-sectional view at AA in the middle;

[0056] Figure 7 yes Figure 6 A partial enlarged view of point B in the middle;

[0057] Figure 8 1 is a schematic structural diagram of a driving mechanism according to an embodiment of the present invention;

[0058] Figure 9 is a schematic structural diagram of a translation assembly according to an embodiment of the present invention;

[0059] Figure 10 2. It is a structural diagram of the grinding arm in the swing working state according to an embodiment of the present invention;

[0060] Figure 11 This is a front view of the grinding arm in the swing working state according to an embodiment of the present invention;

[0061] Figure 12 This is a main view of the working state of the detection component of an embodiment of the present invention;

[0062] Figure 13 This is a schematic diagram of the working state structure of the detection component of an embodiment of the present invention;

[0063] Figure 14 yes Figure 13 A partial enlarged view of point C in the middle;

[0064] Figure 15 This is a schematic structural diagram of the grinding arm in the downward pressing working state according to an embodiment of the present invention;

[0065] Figure 16 This is the third structural diagram of an embodiment of the present invention;

[0066] In the picture:

[0067] 1. Adsorption filter unit; 11. Dust hood;

[0068] 2. Mobile chassis; 21. Control handle;

[0069] 3. Grooving unit; 31. Driving mechanism; 311. Gear ring; 312. Rack; 313. Guide rod; 3131. Jackscrew adapter sleeve; 314. Translation assembly; 3141. Push block; 3142. Telescopic cylinder; 3143. Push rod; 3144. Reset assembly; 3145. Shift fork; 315. Driving source; 32. Support frame; 321. Positioning plate; 33. Grinding arm; 331. Rotating frame; 332. Parallelogram linkage; 333. Lifting drive element; 334. Lower pressure frame; 335. Grinding head; 34. Preload mechanism; 35. Detection assembly; 351. Electric cylinder; 352. Sliding rod; 353. Fixing plate; 354. Detection plate; 355. Position sensor; 356. Detection head; 36. Rotating assembly; 361. Upper end cover; 362. Fixed shaft; 363. Axial bearing; 364. Radial bearing; 365. Lower end cover;

[0070] 4. Power unit. DETAILED DESCRIPTION

[0071] Example

[0072] like Figures 1 to 16As shown, the road surface cutting and grooving device of the present invention comprises:

[0073] A mobile chassis 2, one end of which is connected to a control handle 21, and an end of the control handle 21 is provided with a control button, through which a worker can control various functions of the device;

[0074] The adsorption and filtration unit 1 is provided on the mobile chassis 2 and is used to adsorb and filter dust generated during the groove repair process;

[0075] like Figure 16 As shown, a dust hood 11 is connected to the lower end of the mobile chassis 2 for absorbing dust generated during the groove repair process. The dust hood is arranged near the working area of ​​the grinding head for capturing dust at the source; a filter box, whose air inlet is connected to the dust hood through a pipe, is provided inside the filter box with at least one stage of high-efficiency filter assembly, such as a HEPA filter element; a dust collecting device for collecting filtered dust; an air intake fan, whose air inlet is connected to the clean air outlet end of the filter box. When the air intake fan is working, it drives the entire system to form a negative pressure airflow, sucking the dust from the dust hood and finally capturing it in the filter box.

[0076] The power unit 4 is provided on the mobile chassis 2. The power unit 4 includes a generator and a small hydraulic station provided on the upper end of the mobile chassis. The small hydraulic station is used for a hydraulic motor and a hydraulic cylinder.

[0077] The groove repair unit 3 is provided on the mobile chassis 2 and is powered by the power unit 4. The groove repair unit 3 includes:

[0078] A support frame 32 is connected to the mobile chassis 2;

[0079] A grinding arm 33, one end of which is rotatably connected to the support frame 32;

[0080] A detection assembly 35 is provided on the grinding arm 33 and is used to detect the position of the road surface notch;

[0081] A pre-tightening mechanism 34 is connected between the grinding arm 33 and the mobile chassis 2 or the support frame 32, and is used to provide a preset initial position for the grinding arm 33;

[0082] The driving mechanism 31 is used to selectively engage with the grinding arm 33 to drive it to swing, or disengage from the grinding arm 33 to allow the grinding arm 33 to swing freely under the action of the preload mechanism 34, thereby moving following the shape of the road groove.

[0083] The grinding arm 33 comprises:

[0084] A rotating frame 331, one end of which is rotatably connected to the supporting frame 32;

[0085] A lower pressing frame 334 on which the detection assembly 35 is mounted;

[0086] The grinding head 335 is driven by a hydraulic motor and mounted on the lower press frame 334;

[0087] A parallelogram linkage mechanism 332 is connected between the rotating frame 331 and the lower pressing frame 334 to ensure that the lower pressing frame 334 maintains a stable posture during the lifting process;

[0088] The lifting drive member 333 is used to drive the lower pressing frame 334 to move up and down relative to the rotating frame 331.

[0089] The lifting drive member 333 is a hydraulic cylinder, which is hinged between the rotating frame 331 and the lower pressing frame 334 .

[0090] like Figure 14 As shown, the detection assembly 35 is mounted on the lower pressure frame 334 and is located at the end away from the hydraulic motor.

[0091] The detection assembly 35 includes an electric cylinder 351 connected to the lower pressure frame 334, the output end of the electric cylinder 351 is connected to the fixed plate 353, and the two ends of the electric cylinder 351 are slidably connected to the sliding rod 352, the sliding rod 352 slides through the fixed plate 353, and the end of the sliding rod 352 away from the electric cylinder 351 is connected to the detection plate 354, the sliding rod 352 is located between the fixed plate 353 and the detection plate 354 and is sleeved with a compression spring, and a detachable detection head 356 is threadedly connected to the detection plate 354, and position sensors 355 are installed on the detection plates 354 at both ends of the detection head 356, and a protective sleeve is provided on the outside of the position sensor 355 to prevent damage to the position sensor 355 when it falls.

[0092] By setting the sliding rod 352, the movement of the detection plate 354 can be made more stable. When the detection head 356 rests against the ground, the compression spring is compressed, and a locking sleeve with a top screw is connected to the sliding rod 352. The locking sleeve is used to install the fixed plate 353 on the sliding rod 352 to prevent the sliding rod 352 from detaching from the fixed plate 353.

[0093] When the grinding arm 33 swings, the detection head 356 is pressed against the ground in advance by the electric cylinder 351. The head of the detection head 356 is provided with a wear-resistant ball, which moves on the ground. During the movement, the detection head 356 is buffered by the compression spring. When the detection head 356 enters the groove to be ground, the compression spring is released, pushing the position sensor 355 against the ground, thereby controlling the drive source 315 to stop. At this time, the detection head 356 can be retracted by the electric cylinder 351, and the lifting drive member 333 drives the grinding head 335 to move downward.

[0094] The parallelogram linkage mechanism 332 used to control the grinding head 335 to move downward can move the grinding head 335 forward a certain distance so that the grinding head 335 can be better dropped to the position of the detection head 356 .

[0095] The lower end of the detection head 356 is conical or stepped, and the maximum diameter is slightly smaller than the width of the groove to be ground. This ensures the positioning accuracy. Only when the maximum diameter of the detection head enters the groove to be ground can the position sensor 355 be activated, thereby ensuring the maximum positioning accuracy.

[0096] The driving mechanism 31 includes:

[0097] The gear ring 311 is fixed on the rotating frame 331 of the grinding arm 33;

[0098] The rack 312 is movably mounted on the support frame 32;

[0099] like Figure 8 and Figure 9 As shown, the rack 312 is slidably connected to the guide rod 313, and both ends of the guide rod 313 are slidably connected to the vertical plates at both ends of the support frame 32. The two ends of the guide rod 313 are pressed against the inner side of the vertical plates through the top screw tightening sleeve 3131, thereby ensuring the movement stability of the guide rod 313.

[0100] The translation assembly 314 is used to drive the rack 312 to move laterally so that the rack 312 engages with or disengages the gear ring 311;

[0101] The driving source 315 is used to drive the rack 312 to reciprocate when the rack 312 is engaged with the gear ring 311 , thereby driving the grinding arm 33 to swing.

[0102] The driving source 315 is an electric cylinder, which is hinged between the support frame 32 and the rack 312 .

[0103] The support frame 32 includes two parallel positioning plates 321 , and the rack 312 is slidably arranged between the two positioning plates 321 , thereby ensuring the smooth movement of the rack 312 , and the positioning plates 321 simultaneously act as guide rails.

[0104] like Figure 9 As shown, the translation assembly 314 includes:

[0105] The telescopic cylinder 3142 is connected to the support frame 32 and is a square hydraulic cylinder;

[0106] A pushing mechanism connected to the output end of the telescopic cylinder 3142, the pushing mechanism including at least one shift fork 3145 for pushing the rack 312 to move laterally;

[0107] The pushing mechanism includes a pushing block 3141 connected to the output end of the telescopic cylinder 3142, and the end of the pushing block 3141 away from the telescopic cylinder 3142 is connected to the pushing rod 3143, and the two ends of the pushing block 3141 are inserted into the grooves provided on the pushing rod 3143, so as to prevent the pushing rod 3143 from rotating when the pushing block 3141 pushes the pushing rod 3143. Both ends of the pushing rod 3143 are connected to a shift fork 3145, and pushing the guide rod 313 from both sides can make the movement of the guide rod 313 more stable, and at the same time can make the force on both sides of the guide rod 313 more even.

[0108] The reset assembly 3144 is used to make the rack 312 rest against the shift fork 3145 and maintain it at a preset position when the telescopic cylinder 3142 is not in action.

[0109] The reset assembly 3144 includes a spring seat connected to the positioning plate 321 by a screw, and the spring seat is connected to the guide rod 313 through a spring. The end of the spring is connected to the guide rod 313 through a locking block, so that the spring can better follow the movement of the guide rod 313 to avoid impact.

[0110] The rotating frame 331 of the grinding arm 33 is mounted on the support frame 32 via a rotating assembly 36. The rotating assembly 36 includes:

[0111] like Figure 4 As shown, the fixed shaft 362 is keyed to the support frame 32 , and the fixed shaft 362 is fixed to the support frame 32 via a spline, specifically to the mounting portion of the support frame 32 extending toward the middle of the mobile chassis 2 .

[0112] The radial bearing 364 is mounted on the fixed shaft 362, and the rotating frame 331 is mounted on the outer ring of the radial bearing 364;

[0113] The axial bearing 363 is used to support the axial load of the rotating frame 331 .

[0114] The pre-tightening mechanism 34 is a tension spring assembly, which includes a tension spring, two ends of which are respectively connected to the grinding arm 33 and the movable chassis 2 .

[0115] like Figure 7As shown, both ends of the fixed shaft 362 are respectively connected to the upper end cover 361 and the lower end cover 365, the upper end cover 361 fixes the fixed shaft 362 and the support frame 32 together, and the upper and lower ends of the rotating frame 331 are respectively connected to the axial bearings 363, the upper end face of the upper axial bearing 363 abuts against the lower end of the support frame 32, and the lower end face of the lower axial bearing 363 abuts against the upper end of the lower end cover 365, and a pair of radial bearings 364 are mounted on the fixed shaft 362 between the axial bearings 363. The radial bearings 364 are tapered roller bearings, the inner ring of the tapered roller bearing abuts against the fixed shaft 362, and the outer ring of the tapered roller bearing is positioned by the axial bearing 363. The tapered roller bearings used in pairs can withstand part of the axial force, thereby making the movement of the rotating frame 331 more stable.

[0116] Working principle:

[0117] Dual-mode motion control principle: Through the clutch function of the drive mechanism 31, the grinding arm 33 can operate in two modes:

[0118] Active Positioning Mode (Engaged): When the initial position of the notch needs to be quickly and accurately determined, the translation assembly 314 drives the rack 312 to engage the gear ring 311 on the grinding arm 33. At this point, a drive source 315, such as an electric cylinder, acts as the primary force, driving the rack 312 to precisely control the swinging of the grinding arm 33, enabling the detection assembly 35 to quickly locate and locate the notch.

[0119] Passive Following Mode (Disengaged): When positioning is complete and the grinding head 335 enters the notch to begin operation, the translation assembly 314 drives the rack 312 to disengage from the gear ring 311. At this point, the drive mechanism 31 is decoupled from the grinding arm 33, allowing the grinding arm 33 to rotate freely under the continuous, flexible tension provided by the preload mechanism 34, such as a tension spring. As the operator pulls the entire device forward along the notch, the grinding head 335 maintains contact with the notch's inner wall, grinding both sides of the notch. This automatically follows the irregular shape of the notch, similar to contouring, to achieve a continuous, smooth chamfer.

[0120] Constant-Posture Grinding Principle: To ensure uniform chamfer quality, the grinding arm 33 utilizes a parallelogram linkage 332 to connect the rotating frame 331 and the lower pressure frame 334. The geometric characteristics of this mechanism ensure that regardless of the vertical movement of the lower pressure frame 334 by the lifting drive 333, the lower pressure frame 334 and the grinding head 335 mounted thereon always remain parallel to the ground. This fundamentally ensures that the chamfer angle and depth of the notch edge remain constant throughout the entire operation, overcoming the drawbacks of manual operation, which can result from uneven angles and force.

[0121] Precision Sensing and Positioning Principle: The detection assembly 35 is key to achieving automatic positioning. Its operating principle is as follows: In active positioning mode, the detection head 356 is lowered to the road surface by the electric cylinder 351. As the grinding arm 33 swings, the detection head 356 slides along the road surface. Once the detection head lands in the target slot, its vertical position undergoes a sudden change. This displacement is captured by the position sensor 355, which immediately sends a positioning completion signal to the control system, halting the swing of the grinding arm. This principle, based on mechanical feelers and electrical signal feedback, ensures reliable positioning and is unaffected by environmental factors such as light and dust.

[0122] Source Dust Control Principle: The adsorption filtration unit 1 utilizes a negative pressure suction principle. A suction fan serves as the power source, generating strong suction at the system's end. A dust hood 11, located adjacent to the grinding head 335 operating area, ensures that dust is captured by the negative pressure airflow the moment it is generated and drawn into the filter box through a duct. Multi-stage filtration components (such as HEPA filters) within the filter box trap dust particles, ultimately emitting clean air. This principle controls pollution at the source, significantly improving the working environment and safeguarding operator health.

[0123] Working process:

[0124] Step 1 Preparation and initial positioning:

[0125] The operator uses the control handle 21 to pull the road surface cutting and grooving device to the vicinity of the starting section of the groove to be repaired.

[0126] Start the power unit 4 to supply power to the hydraulic system and the electrical system.

[0127] The operator presses the control button at the end of the control handle 21 .

[0128] Step 2: Automatic search and precise alignment:

[0129] Entering active positioning mode: The control system instructs the telescopic cylinder 3142 in the translation assembly 314 to move, pushing the shift fork 3145 to make the rack 312 mesh with the gear ring 311 of the grinding arm 33 .

[0130] Lowering the detection probe: The electric cylinder 351 in the detection assembly 35 extends and lowers the detection head 356 to contact the road surface.

[0131] Start swing arm search: Drive source 315, the electric cylinder is started, driving the rack 312 to move, driving the grinding arm 33 to swing around its fixed axis 362 as the center, and start horizontal search for the slot.

[0132] Positioning success: When the detection head 356 falls into the slot during the swing process, the position sensor 355 triggers a signal. The control system immediately stops the drive source 315, and the swing of the grinding arm 33 stops. At this time, the grinding head 335 is accurately aligned directly above the slot.

[0133] Retract the detection probe: The electric cylinder 351 is retracted, and the detection component 35 is lifted to a safe position.

[0134] Step 3 Grinding operation and automatic following:

[0135] Lowering the grinding head: The hydraulic motor of the grinding head 335 is started to rotate at high speed. Then, the lifting drive 333 is actuated, and the hydraulic cylinder is actuated to drive the lower pressing frame 334 to descend smoothly, allowing the rotating grinding head 335 to enter the notch and begin chamfering the edge.

[0136] Switching to the passive following mode: The control system instructs the telescopic cylinder 3142 to reset, and the rack 312 is separated from the gear ring 311 under the action of the reset component 3144. At this time, the grinding arm 33 enters a free swing state.

[0137] Advancing Along the Trough: The operator begins by pulling the entire device forward at a constant speed along the trough opening using the control handle 21. During this process, the grinding arm 33 automatically adjusts its angle to follow any curvature of the trough opening. Simultaneously, the adsorption and filtration unit 1 operates throughout the entire process, sucking away all dust.

[0138] Completing the job: After reaching the end of the slot, the operator stops moving forward.

[0139] Step 4: Reset and End:

[0140] Lifting the grinding head: The lifting drive 333 reverses and lifts the grinding head 335 from the slot to the initial height. The hydraulic motor of the grinding head is then turned off.

[0141] Arm return: Under the pulling force of the pre-tightening mechanism 34, the grinding arm 33 automatically swings back to its initial position.

[0142] Job completed: At this point, the chamfering of the groove is completed.

[0143] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up and down, does not constitute a limitation of the present invention and is only for the convenience of description.

Claims

1. A road surface cutting and grooving device, comprising: Mobile chassis (2); An adsorption and filtering unit (1) is provided on the mobile chassis (2) and is used to adsorb and filter dust generated during the groove repair process; A power unit (4) is provided on the mobile chassis (2); It is characterized in that The groove repair unit (3) is arranged on the mobile chassis (2) and is powered by the power unit (4). The groove repair unit (3) includes: A support frame (32) connected to the mobile chassis (2); A grinding arm (33), one end of which is rotatably connected to the support frame (32); A detection assembly (35) is provided on the grinding arm (33) and is used to detect the position of the road surface groove; A pre-tightening mechanism (34) is connected between the grinding arm (33) and the movable chassis (2) or the support frame (32), and is used to provide a preset initial position for the grinding arm (33); The driving mechanism (31) is used to selectively engage with the grinding arm (33) to drive the grinding arm (33) to swing, or to disengage from the grinding arm (33) to allow the grinding arm (33) to swing freely under the action of the pre-tightening mechanism (34), thereby moving in accordance with the shape of the road surface groove.

2. The road surface cutting and grooving device according to claim 1, characterized in that: The grinding arm (33) comprises: A rotating frame (331), one end of which is rotatably connected to the supporting frame (32); A lower pressing frame (334) on which the detection assembly (35) is located; A grinding head (335) is driven by a hydraulic motor and mounted on a lower press frame (334); A parallelogram linkage mechanism (332) is connected between the rotating frame (331) and the lower pressing frame (334) to ensure that the lower pressing frame (334) maintains a stable posture during the lifting process; The lifting drive member (333) is used to drive the lower pressing frame (334) to move up and down relative to the rotating frame (331).

3. The road surface cutting and grooving device according to claim 2, characterized in that: The lifting drive member (333) is a hydraulic cylinder, which is hinged between the rotating frame (331) and the lower pressing frame (334).

4. The road surface cutting and grooving device according to claim 2, characterized in that: The detection assembly (35) is mounted on the lower pressing frame (334) and is located at an end facing away from the hydraulic motor.

5. The road surface cutting and grooving device according to any one of claims 1 to 3, characterized in that: The driving mechanism (31) comprises: A gear ring (311) is fixed on a rotating frame (331) of a grinding arm (33); A rack (312) movably mounted on the support frame (32); A translation assembly (314) for driving the rack (312) to move laterally so as to engage or disengage the rack (312) with the gear ring (311); The driving source (315) is used to drive the rack (312) to reciprocate when the rack (312) is engaged with the gear ring (311), thereby driving the grinding arm (33) to swing.

6. The road surface cutting and grooving device according to claim 5, characterized in that: The driving source (315) is an electric cylinder, which is hinged between the support frame (32) and the rack (312).

7. The road surface cutting and grooving device according to claim 6, characterized in that: The support frame (32) includes two parallel positioning plates (321), and the rack (312) is slidably arranged between the two positioning plates (321).

8. The road surface cutting and grooving device according to claim 5, characterized in that: The translation assembly (314) includes: A telescopic cylinder (3142) is connected to the support frame (32); A pushing mechanism connected to the output end of the telescopic cylinder (3142), the pushing mechanism comprising at least one shift fork (3145) for pushing the rack (312) to move laterally; The reset assembly (3144) is used to make the rack (312) abut against the shift fork (3145) and maintain it in a preset position when the telescopic cylinder (3142) is not in action.

9. The road surface cutting and grooving device according to claim 1, characterized in that: The rotating frame (331) of the grinding arm (33) is mounted on the support frame (32) via a rotating assembly (36), and the rotating assembly (36) includes: A fixed shaft (362) keyed to the support frame (32); A radial bearing (364) is sleeved on the fixed shaft (362), and a rotating frame (331) is sleeved on the outer ring of the radial bearing (364); The axial bearing (363) is used to support the axial load of the rotating frame (331).

10. The road surface cutting and grooving device according to claim 1, characterized in that: The pre-tightening mechanism (34) is a tension spring assembly, which includes a tension spring, the two ends of which are respectively connected to the grinding arm (33) and the movable chassis (2).

Images