Concrete pavement joint cutting device

Abstract

The invention discloses a concrete pavement joint cutting device, and belongs to the technical field of road construction. The concrete pavement joint cutting device comprises a frame, a driving part and a cutting blade, the driving part is arranged at the bottom of the frame, an output shaft of the driving part is horizontally arranged, an arc-shaped sliding groove is formed in the side face, around the output shaft, of the frame, an opening of the sliding groove faces downwards, a sliding block is arranged in the sliding groove in a sliding mode, a rotating shaft is arranged on the sliding block, and the cutting blade is arranged on the rotating shaft. A rotating disc is arranged at the end of the rotating shaft, a driven wheel is rotationally arranged on the rotating disc, the cutting blade is fixedly arranged on the side face of the driven wheel, the driven wheel is connected with a driving wheel through an annular connecting piece, and the driving wheel is fixed to the output shaft. According to the concrete pavement joint-cutting device, the problems that when a cutting blind area is cut, a concrete joint-cutting machine needs to be moved, and the direction of the concrete joint-cutting machine needs to be turned are solved, the step that joint alignment needs to be conducted again through a cutting piece is further avoided, operation is more efficient, and construction is more efficient.

Description

Technical Field

[0001] This invention relates to the field of road construction technology, and specifically to a concrete pavement cutting device. Background Technology

[0002] Road and bridge surfaces are typically made of asphalt or concrete. Asphalt has greater ductility than concrete. During the hardening process of concrete, cement hydration releases a large amount of heat, causing the concrete temperature to rise. After most of the cement hydration reaction is complete, the concrete temperature begins to drop. During this cooling process, the concrete has already hardened, and the shrinkage caused by cooling can lead to cracking. These cracks are often random in direction, severely affecting the quality and service life of the road surface.

[0003] Therefore, it is necessary to cut grooves in concrete pavement to relieve the destructive force of concrete shrinkage and improve the service life of concrete pavement. However, concrete pavement is usually higher than the roadbed, and existing concrete cutting machines need to be on the pavement to cut grooves. The cutting direction is mostly along the width of the pavement. Since the cutting blades on the concrete cutting machine are all located at the end of the machine body, there is a cutting blind spot near the edge of the pavement where the worker stands when cutting a groove. It is necessary to turn the concrete cutting machine around and cut the blind spot again. The process of turning the machine around requires lifting the cutting blades again, turning the concrete cutting machine around, and re-aligning the cutting blades, which is cumbersome and slows down the construction progress. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems in the prior art and provide a concrete pavement cutting device that avoids the need to move the concrete cutting machine and turn its direction when cutting blind spots, and further avoids the need to re-align the cutting blades, making the operation more convenient and the construction more efficient.

[0005] This invention provides a concrete pavement cutting device comprising a frame, a drive unit, and a cutting blade. The drive unit is disposed at the bottom of the frame, and its output shaft is horizontally positioned. An arc-shaped groove is provided on the side of the frame surrounding the output shaft, with the groove opening downwards. A slider is slidably disposed within the groove, and a rotating shaft is disposed on the slider. A turntable is disposed at the end of the rotating shaft, and a driven wheel is rotatably disposed on the turntable. The cutting blade is fixedly disposed on the side of the driven wheel. The driven wheel is connected to a driving wheel via an annular connector, and the driving wheel is fixed on the output shaft. By moving the slider to the opposite end of the groove, the frame is moved in the opposite direction, thereby enabling the cutting blade to cut the blind area.

[0006] Preferably, the pivot is disposed within the elongated frame, and the inner walls on both sides of the elongated frame along its length direction abut against and slide on the arc surface of the pivot. The elongated frame is vertically oriented. A long, narrow through groove is fixedly provided on the top of the frame. The length direction of the through groove is parallel to the forward and backward movement direction of the frame. A sliding sleeve is provided within the through groove. The outer wall of the sliding sleeve is slidably connected to the inner wall of the through groove. The inner wall of the sliding sleeve is slidably connected to the upper end of the elongated frame, and the cross-sectional shape of the inner wall of the sliding sleeve is the same as the outer contour shape of the elongated frame.

[0007] Preferably, the top of the frame is provided with a protrusion, and the left and right sides of the protrusion are provided with arcs at the connection positions with the upper surface of the frame. The protrusion is located directly above the output shaft and on the side of the through groove. The upper end of the elongated frame extends out of the upper end face of the sliding sleeve, and the upper end of the elongated frame is provided with a roller. The roller is rotatably connected to the top surface of the frame and can pass along the arcs past the protrusion.

[0008] Preferably, both the upper and lower ends of the sliding sleeve are fixedly connected with retaining rings, and the opposing surfaces of the two retaining rings are slidably connected to the upper or lower end surface of the through groove, respectively.

[0009] Preferably, the top of the frame is provided with two limiting holes, and the two limiting holes are respectively located at both ends of the through groove; the retaining ring located at the upper end of the sliding sleeve is provided with two positioning holes, and the two positioning holes are respectively located on both sides of the long frame. The positioning holes and limiting holes that are adjacent to each other are connected by the same vertical rod to restrict the movement of the long frame.

[0010] Preferably, the slide groove is a T-shaped slide groove, and the slider is a T-shaped slider, with the T-shaped slider slidingly engaging with the T-shaped slide groove.

[0011] Preferably, the central angle of the arc-shaped groove is less than 180°, and the two ends of the groove are symmetrically distributed about the output axis.

[0012] Preferably, both the driven pulley and the driving pulley are belt pulleys, the annular connector is a belt, and the belt connects the two pulleys.

[0013] Preferably, handles are provided at both the front and rear ends of the vehicle frame in the direction of travel.

[0014] Preferably, a roller is provided at the lower end of the frame, and the height of the lower edge of the roller is greater than the height of the lower edge of the cutting blade when the cutting blade is located at the end of the groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this concrete pavement cutting device, the two ends of the chute are the working positions of the cutting blade. Moving the slider along the chute changes the working positions of the turntable and the cutting blade. Initially, the cutting blade works at one end of the chute. As the frame moves on the road surface, it cuts the concrete pavement and leaves a cutting slit until the cutting blade moves to the edge of the road surface. At this point, the slider is moved to the other end of the chute. Since the position of the frame has not changed and the cutting slit is straight, the cutting blade can smoothly enter the cutting slit. Then, the frame is moved in the opposite direction to cut the blind spot of the cutting blade.

[0016] This concrete pavement cutting device eliminates the need to move and rotate the concrete cutting machine when cutting blind spots, and also avoids the need to re-align the cutting blades, making operation simpler and construction more efficient. Attached Figure Description

[0017] Figure 1 This is a diagram showing the positional relationship between the slide and the output shaft of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram illustrating the operation of the cutting blade of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Frame, 2. Cutting blade, 3. Output shaft, 4. Slide groove, 5. Slider, 6. Rotary shaft, 7. Turntable, 8. Driven wheel, 9. Annular connector, 10. Drive wheel, 11. Long frame, 12. Through groove, 13. Sliding sleeve, 14. Protrusion, 15. Retaining ring, 16. Limiting hole, 17. Positioning hole, 18. Roller, 19. Handle, 20. Roller. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense by one of ordinary skill in the art to which this invention pertains. Words such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “inner,” “outer,” “upper,” “lower,” “far,” “near,” “front,” and “back” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0021] The accompanying drawings in this invention are not strictly drawn to scale, and the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this invention are merely structural schematic diagrams.

[0022] The concrete pavement cutting device provided by this invention is as follows: Figures 1-3 The device includes a frame 1, a drive unit, and a cutting blade 2. The drive unit is located at the bottom of the frame 1. The output shaft 3 of the drive unit is horizontally positioned, and an arc-shaped groove 4 is provided on the side of the frame 1 around the output shaft 3. The opening of the groove 4 faces downward, and a slider 5 is slidably mounted inside the groove 4. A rotating shaft 6 is mounted on the slider 5, and a turntable 7 is mounted at the end of the rotating shaft 6. A driven wheel 8 is rotatably mounted on the turntable 7, and the cutting blade 2 is fixedly mounted on the side of the driven wheel 8. The driven wheel 8 is connected to a driving wheel 10 through an annular connector 9. The driving wheel 10 is fixed on the output shaft 3. By moving the slider 5 to the opposite end of the groove 4, the frame 1 is moved in the opposite direction, thereby enabling the cutting blade 2 to cut the blind area.

[0023] In this concrete pavement cutting device, the driving component is a motor, and the two ends of the slide 4 are the working positions of the cutting blade 2. The slider 5 is moved along the slide 4 to change the working positions of the turntable 7 and the cutting blade 2. In the initial state, the cutting blade 2 works at one end of the slide 4. As the frame 1 moves on the road surface, it cuts the concrete pavement and leaves a cutting slit until the cutting blade 2 moves to the edge of the road surface. At this time, the slider 5 is moved to the other end of the slide 4. Since the position of the frame 1 has not changed and the cutting slit is a straight line, the cutting blade 2 can smoothly enter the cutting slit. Then the frame 1 is moved in the opposite direction to cut the blind area of ​​the cutting blade 2.

[0024] This concrete pavement cutting device eliminates the need to move and rotate the concrete cutting machine when cutting blind spots, and also avoids the need to re-align the cutting blades, making operation simpler and construction more efficient.

[0025] In this embodiment, as Figures 1-3The pivot 6 is set inside the elongated frame 11, and the inner walls on both sides of the elongated frame 11 along its own length direction abut and slide to connect with the arc surface on the pivot 6. The elongated frame 11 is set vertically. The top of the frame 1 is fixedly provided with an elongated through groove 12. The length direction of the through groove 12 is parallel to the forward and backward movement direction of the frame 1. A sliding sleeve 13 is provided in the through groove 12. The outer wall of the sliding sleeve 13 is slidably connected to the inner wall of the through groove 12. The inner wall of the sliding sleeve 13 is slidably connected to the upper end of the elongated frame 11, and the cross-sectional shape of the inner wall of the sliding sleeve 13 is the same as the outer contour shape of the elongated frame 11.

[0026] In order to better actuate the rotating shaft 6, the long frame 11 further drives the slider 5, the turntable 7, the driven wheel 8 and the cutting blade 2 to move together along the slide groove 4. When the long frame 11 is moved, the resistance at the upper and lower ends of the long frame 11 is different, and the long frame 11 is prone to deflection. The long frame 11 is restricted to the sliding sleeve 13. The sliding sleeve 13 restricts the long frame 11 to keep it vertical, thus avoiding the problem of the long frame 11 deflection.

[0027] In this embodiment, as Figure 1 and Figure 3 The top of the frame 1 is provided with a protrusion 14. The left and right sides of the protrusion 14 are provided with arcs at the connection positions with the upper surface of the frame 1. The protrusion 14 is located directly above the output shaft 3 and is located on the side of the through groove 12. The upper end of the long frame 11 extends out of the upper end face of the sliding sleeve 13. The upper end of the long frame 11 is provided with a roller 18. The roller 18 is rotatably connected to the top surface of the frame 1 and can pass along the arc of the protrusion 14.

[0028] When the long frame 11 moves laterally, the roller 18 moves along the arc to the top of the protrusion 14. At the same time, the protrusion 14 lifts the roller 18 and the long frame 11 upwards to avoid interference between the long frame 11 and the output shaft 3 and the drive wheel.

[0029] In this embodiment, as Figure 1 and Figure 3 Both ends of the sliding sleeve 13 are fixedly connected with retaining rings 15, and the opposing surfaces of the two retaining rings 15 are slidably connected to the upper or lower end face of the through groove 12.

[0030] The retaining ring 15 is used to prevent the sliding sleeve 13 from tilting.

[0031] In this embodiment, as Figure 1 and Figure 3The top of the frame 1 is provided with two limiting holes 16, and the two limiting holes 16 are respectively located at both ends of the through groove 12; the retaining ring 15 located at the upper end of the sliding sleeve 13 is provided with two positioning holes 17, and the two positioning holes 17 are respectively located on both sides of the long frame 11. The positioning holes 17 and limiting holes 16 that are adjacent to each other are connected by the same vertical rod to restrict the movement of the long frame 11.

[0032] When the cutting disc 2 moves to the end of the slide 4, a vertical rod is inserted into the positioning hole 17 and the limiting hole 16 to limit the relative displacement of the cutting disc 2 in the slide 4.

[0033] In this embodiment, the slide 4 is a T-shaped slide, and the slider 5 is a T-shaped slider, with the T-shaped slider slidingly engaging with the T-shaped slide.

[0034] This can prevent slider 5 from slipping out of the groove 4.

[0035] In this embodiment, the central angle of the arc-shaped groove 4 is less than 180°, and the two ends of the groove 4 are symmetrically distributed about the output shaft 3.

[0036] When the central angle of the slide 4 is 180°, the two ends of the slide 4 are dead angles of the slider 5, which is not conducive to the sliding of the arc block.

[0037] In this embodiment, both the driven wheel 8 and the driving wheel 10 are pulleys, and the annular connector 9 is a belt that connects the two pulleys.

[0038] In this embodiment, as Figure 1 and Figure 3 Handles 19 are provided at both the front and rear ends of the frame 1 in the direction of travel.

[0039] In this embodiment, as Figure 1 and Figure 3 A roller 20 is provided at the lower end of the frame 1. The height of the lower edge of the roller 20 is greater than the height of the lower edge of the cutting blade 2 when the cutting blade 2 is located at the end of the groove 4.

[0040] The method of using this concrete pavement cutting device is as follows: Push handle 19 to move frame 1 to the edge of concrete pavement (the area under the operator's feet and below frame 1 is a blind spot for cutting), push retaining ring 15 and sliding sleeve 13 to the middle of through groove 12, start the drive, the cutting blade 2 rotates, push retaining ring 15 and sliding sleeve 13 toward the other edge of concrete pavement, the cutting blade contacts the concrete surface until it cuts into the concrete, and the cutting blade is in the working position at the end of groove 4. At this time, insert the vertical rod and push frame 1 toward the other edge of concrete pavement until the cutting seam penetrates the edge of concrete pavement.

[0041] Next, remove the vertical rod, push the retaining ring 15 and the sliding sleeve 13 in the opposite direction, so that the cutting blade 2 is in the working position at the other end of the sliding groove 4, and the cutting blade 2 smoothly enters the cutting seam. Insert the vertical rod again, push the frame 1 in the opposite direction until the cutting blade completes the cutting of the blind area, and a complete cutting seam is completed.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete pavement cutting device, comprising a frame (1), a drive unit, and a cutting blade (2), characterized in that, The drive unit is located at the bottom of the frame (1). The output shaft (3) of the drive unit is horizontally arranged, and an arc-shaped groove (4) is provided on the side of the frame (1) around the output shaft (3). The opening of the groove (4) is downward. A slider (5) is slidably arranged in the groove (4). A rotating shaft (6) is provided on the slider (5). A turntable (7) is provided at the end of the rotating shaft (6). A driven wheel (8) is rotatably arranged on the turntable (7). The cutting blade (2) is fixedly arranged on the side of the driven wheel (8). The driven wheel (8) is connected to the driving wheel (10) through an annular connector (9). The driving wheel (10) is fixed on the output shaft (3). By moving the slider (5) to the opposite end of the groove (4), the frame (1) is moved in the opposite direction, so that the cutting blade (2) can cut the blind area.

2. The concrete pavement cutting device as described in claim 1, characterized in that, The pivot (6) is set inside the long frame (11), and the inner walls on both sides of the long frame (11) along its own length direction abut against and slide to connect with the arc surface on the pivot (6). The long frame (11) is set vertically. The top of the frame (1) is fixedly provided with a long strip-shaped through groove (12). The length direction of the through groove (12) is parallel to the forward and backward movement direction of the frame (1). A sliding sleeve (13) is provided in the through groove (12). The outer wall of the sliding sleeve (13) is slidably connected to the inner wall of the through groove (12). The inner wall of the sliding sleeve (13) is slidably connected to the upper end of the long frame (11). The cross-sectional shape of the inner wall of the sliding sleeve (13) is the same as the outer contour shape of the long frame (11).

3. The concrete pavement cutting device as described in claim 2, characterized in that, The top of the frame (1) is provided with a protrusion (14), and the left and right sides of the protrusion (14) are provided with arcs at the connection positions with the upper surface of the frame (1). The protrusion (14) is located directly above the output shaft (3) and the protrusion (14) is located on the side of the through groove (12). The upper end of the long frame (11) extends out of the upper end face of the sliding sleeve (13). A roller (18) is provided at the upper end of the long frame (11). The roller (18) is tumbled to the top surface of the frame (1) and can pass through the protrusion (14) along the arc.

4. The concrete pavement cutting device as described in claim 2, characterized in that, Both ends of the sliding sleeve (13) are fixedly connected with retaining rings (15), and the two retaining rings (15) are slidably connected to the upper or lower end face of the through groove (12) respectively.

5. The concrete pavement cutting device as described in claim 4, characterized in that, The top of the frame (1) is provided with two limiting holes (16), and the two limiting holes (16) are respectively located at both ends of the through groove (12); The retaining ring (15) located at the upper end of the sliding sleeve (13) is provided with two positioning holes (17), and the two positioning holes (17) are respectively located on both sides of the long frame (11). The positioning holes (17) and the limiting holes (16) that are close to each other are connected by the same vertical rod to restrict the movement of the long frame (11).

6. The concrete pavement cutting device as described in claim 1, characterized in that, The slide groove (4) is a T-shaped slide groove, and the slider (5) is a T-shaped slider, with the T-shaped slider sliding in conjunction with the T-shaped slide groove.

7. The concrete pavement cutting device as described in claim 1, characterized in that, The central angle of the arc-shaped groove (4) is less than 180°, and the two ends of the groove (4) are symmetrically distributed about the output shaft (3).

8. The concrete pavement cutting device as described in claim 1, characterized in that, Both the driven wheel (8) and the driving wheel (10) are pulleys, and the annular connector (9) is a belt, which connects the two pulleys.

9. The concrete pavement cutting device as described in claim 1, characterized in that, The frame (1) is equipped with handles (19) at both the front and rear ends in the direction of travel.

10. The concrete pavement cutting device as described in claim 1, characterized in that, The lower end of the frame (1) is provided with a roller (20), and the height of the lower edge of the roller (20) is greater than the height of the lower edge of the cutting blade (2) when the cutting blade (2) is located at the end of the groove (4).

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