Concrete pavement joint cutting device

Abstract

The utility model relates to the technical field of highway construction, and provides a concrete pavement joint cutting device which comprises a vehicle body, a telescopic rod is fixedly mounted on the vehicle body, a connecting frame is fixedly connected to the telescopic end of the telescopic rod, a protective frame is fixedly connected to the connecting frame, a cutting blade is rotationally connected into the protective frame, and a rotating shaft of the cutting blade is fixedly connected with the output end of a driving motor; the lower end of the protection frame is fixedly connected with a curtain and a blocking frame, and the curtain sleeves the blocking frame. A positioning mechanism is arranged on the vehicle body and comprises two mounting plates fixedly connected to the vehicle body, a sliding rod is fixedly connected between the two mounting plates, two movable plates slide on the sliding rod, a threaded rod is rotationally connected between the two mounting plates, the threaded rod penetrates through and is in threaded connection with the two movable plates, one end of the threaded rod is fixedly connected with a rotating handle, and the lower ends of the movable plates are fixedly connected with positioning clamping plates; the device can be adapted to cutting lines with different line widths, errors generated during observation are reduced, and the curtain is prevented from being attached to a cutting blade due to the change of air pressure.

Description

Technical Field

[0001] This utility model relates to the field of highway construction technology, and more specifically, to a concrete pavement cutting device. Background Technology

[0002] Expansion joints on highway bridges are structures intentionally retained during the construction of highway bridges. They are mainly designed to prevent factors such as temperature changes from affecting the safety of highway bridges. The expansion joints are required to be able to expand and contract freely in two directions, parallel and perpendicular to the bridge axis, and to be firm and reliable. After the concrete pavement of the highway bridge is completed, the pavement needs to be cut to prevent the road from cracking due to thermal expansion and contraction.

[0003] Patent document CN221663369U discloses a concrete pavement cutting device. This utility model provides a concrete pavement cutting device that can cover the cutting blade, preventing concrete fragments from splashing out during cutting. The device includes a handcart, wheels, a lifting frame, an electric push rod, and a motor. Multiple wheels are rotatably connected to the lower sides of both sides of the handcart. The lifting frame is slidably connected to the right side of the handcart, and an electric push rod is connected to the upper right side of the handcart. The telescopic end of the electric push rod is connected to the lifting frame, and a motor is connected to the front right side of the lifting frame. In this utility model, as the lifting frame moves downwards, the sliding frame contacts the concrete pavement and slides upwards on the protective cover. The first spring is compressed and contracts, causing the telescopic curtain to retract, thus achieving the effect of covering the cutting blade and preventing concrete fragments from splashing out during cutting.

[0004] However, in areas with high airflow velocity, air pressure decreases, causing the telescopic screen to tend to move closer to the cutting edge. Furthermore, when the telescopic screen is not extended to its maximum height, it is wrinkled. If the wrinkled telescopic screen comes into contact with the cutting edge under pressure, it will wear down the screen, thus affecting its lifespan. In addition, the cut should be kept straight, and the straightness deviation should generally not exceed 5 mm / 10 meters. In the existing technology, alignment is achieved by observing the positioning frame aligned with the cut line. However, the size of the positioning frame cannot be adjusted, the thickness of the cut line is not necessarily the same each time it is laid out, and the opening size of the positioning frame cannot be adjusted. If the opening size of the positioning frame is larger than the width of the cut line, it is easy to produce a large error during observation. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a concrete pavement cutting device that can adapt to cutting lines of different widths, reduce errors during observation, and prevent the curtain from sticking to the cutting blade due to changes in air pressure.

[0006] A concrete pavement cutting device includes a vehicle body, on which a telescopic rod is fixedly mounted. A connecting frame is fixedly connected to the telescopic end of the telescopic rod, and a protective frame is fixedly connected to the connecting frame. A cutting blade is rotatably connected inside the protective frame, and the rotating shaft of the cutting blade is fixedly connected to the output end of a drive motor. A curtain and a blocking frame are fixedly connected to the lower end of the protective frame, and the curtain is fitted onto the blocking frame. A positioning mechanism is provided on the vehicle body. The positioning mechanism includes two mounting plates fixedly mounted on the vehicle body, a sliding rod fixedly connected between the two mounting plates, two movable plates sliding on the sliding rod, and a threaded rod rotatably connected between the two mounting plates. The threaded rod passes through and is screwed to the two movable plates, a throttle handle is fixedly connected to one end of the threaded rod, and a positioning clamp is fixedly connected to the lower end of the movable plate.

[0007] Furthermore, the threaded rod is provided with two threaded sections with opposite patterns, and the two movable plates are located on different threaded sections.

[0008] Furthermore, the lower end of the positioning clamp is at most two centimeters above the road surface.

[0009] Furthermore, the positioning clamp is coated with a bright color.

[0010] Furthermore, a sinking frame is fitted onto the blocking frame, the sinking frame is fixed to the lower end of the curtain, and an adjustment and limiting mechanism is provided between the sinking frame and the protective frame.

[0011] Furthermore, the adjustment and limiting mechanism includes a first horizontal plate fixed to the protective frame and a second horizontal plate fixed to the sinking frame. A vertical plate is fixed to the second horizontal plate, and the vertical plate passes through and slides on the first horizontal plate.

[0012] Furthermore, the upright plate is provided with multiple positioning slots at equal intervals along its length, and insert plates are inserted into the positioning slots.

[0013] Furthermore, the vehicle body is equipped with casters.

[0014] Furthermore, handrails are fixedly attached to the vehicle body.

[0015] Furthermore, two limiting frames are fixedly connected to the vehicle body, and sliders are fixedly connected to both sides of the connecting frame, with the sliders sliding within the limiting frames.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] ①In this utility model, a blocking frame is fixedly connected to the lower end of the protective frame. The blocking frame is located inside the curtain and the curtain is sleeved on the blocking frame. The blocking frame can prevent the curtain from sticking to the cutting blade due to changes in air pressure, thereby avoiding damage to the curtain by the cutting blade.

[0018] ② In this utility model, the distance between the two moving plates is changed by rotating the two threaded rods, thereby adapting and adjusting the distance between the two positioning clamps according to the line width of the cutting line. When the device is pushed to make a cut, the cutting line is always located between the two positioning clamps. Since the distance between the two positioning clamps is adjusted according to the line width of the cutting line, the probability of errors during observation is reduced. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 A schematic diagram of the overall structure of a concrete pavement joint cutting device Figure 1 ;

[0021] Figure 2 A schematic diagram of the overall structure of a concrete pavement joint cutting device Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the positioning mechanism;

[0023] Figure 4 This is a partial structural breakdown diagram of a concrete pavement joint cutting device.

[0024] In the diagram: 1. Vehicle body; 2. Telescopic rod; 3. Connecting frame; 4. Protective frame; 5. Drive motor; 6. Curtain; 7. Blocking frame; 8. Positioning mechanism; 81. Mounting plate; 82. Sliding rod; 83. Moving plate; 84. Threaded rod; 85. Throttle; 86. Positioning clamp; 9. Sinking frame; 10. Adjustment limit mechanism; 101. First horizontal plate; 102. Second horizontal plate; 103. Vertical plate; 104. Positioning through groove; 105. Insert plate; 11. Cutting disc; 12. Handrail; 13. Moving wheel; 14. Limiting frame; 15. Slider. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Specific implementation examples:

[0027] like Figure 1-4As shown, a concrete pavement cutting device includes a vehicle body 1, on which a telescopic rod 2 is fixedly installed. A connecting frame 3 is fixedly connected to the telescopic end of the telescopic rod 2. A protective frame 4 is fixedly connected to the connecting frame 3. A cutting blade 11 is rotatably connected inside the protective frame 4. One end of the rotating shaft of the cutting blade 11 is fixedly connected to the output end of a drive motor 5 mounted on the protective frame 4. A curtain 6 is fixedly connected to the lower end of the protective frame 4. The curtain 6 is used to shield the debris and fragments rolled up by the cutting blade 11 during cutting. A blocking frame 7 is fixedly connected to the lower end of the protective frame 4. The blocking frame 7 is located inside the curtain 6, and the curtain 6 is fitted onto the blocking frame 7. The blocking frame 7 can prevent the curtain 6 from being damaged by air. The pressure changes cause the cutting blade 11 to adhere to the screen, thus preventing the screen 6 from being damaged by the cutting blade 11. The vehicle body 1 is also equipped with a positioning mechanism 8, which includes two mounting plates 81 fixedly connected to the vehicle body 1. A sliding rod 82 is fixedly connected between the two mounting plates 81. Two movable plates 83 slide on the sliding rod 82. A threaded rod 84 is rotatably connected between the two mounting plates 81. The threaded rod 84 passes through and is threadedly connected to the two movable plates 83. The threaded rod 84 is provided with two threaded sections with opposite patterns. The two movable plates 83 are threadedly connected to different threaded sections. A throttle 85 is fixedly connected to one end of the threaded rod 84. A positioning clamp 86 is fixedly connected to the lower end of the movable plate 83. By rotating the two threaded rods 84, the distance between the two moving plates 83 is changed, thereby adjusting the distance between the two positioning clamps 86 according to the width of the cutting line. When the device is pushed to make a cut, the cutting line is always located between the two positioning clamps 86. Because the distance between the two positioning clamps 86 is adjusted to match the width of the cutting line, the probability of errors during observation is reduced.

[0028] like Figure 1-4 As shown, the lower end face of the positioning clamp 86 is at most two centimeters above the road surface, which is two centimeters in this embodiment. If the positioning clamp 86 is too high above the road surface, it is easy to increase the error when observing. The positioning clamp 86 is coated with a bright color, such as red or yellow. In this embodiment, it is red. By coating the positioning clamp 86 with color, it can be distinguished from the moving plate 83, which can also make the staff more focused when observing.

[0029] like Figure 1-4As shown, a sunken frame 9 is fitted onto the blocking frame 7, and the sunken frame 9 is fixedly connected to the lower end of the curtain 6. An adjustment limiting mechanism 10 is provided between the sunken frame 9 and the protective frame 4. The adjustment limiting mechanism 10 includes a first horizontal plate 101 fixedly connected to the protective frame 4 and a second horizontal plate 102 fixedly connected to the sunken frame 9. A vertical plate 103 is fixedly connected to the second horizontal plate 102. The vertical plate 103 passes through and slides on the first horizontal plate 101. Multiple positioning slots 104 are equally spaced along the length of the vertical plate 103. Insert plates 105 are inserted into the positioning slots 104. When the insert plate 105 is pulled out, and the height of the connecting frame 3, the protective frame 4, and the cutting blade 11 is adjusted by extending and retracting the telescopic rod 2, the sinking frame 9 remains in contact with the road surface due to gravity. After the height of the cutting blade 11 is adjusted and it cuts into the road surface, the drive motor 5 is turned off, and the insert plate 105 is inserted into the positioning slot 104 at the appropriate position. This appropriate positioning slot 104 is the positioning slot 104 closest to the upper end face of the first horizontal plate 101. If a gap is required between the sinking frame 9 and the road surface, the upright plate 103 is pulled upward, and the insert plate 105 is inserted into the positioning slot 104 closest to the upper end face of the first horizontal plate 101 at this time, and the lower end face of the insert plate 105 is in contact with the upper end face of the first horizontal plate 101, limiting the lowest position of the sinking frame 9.

[0030] like Figure 1-4 As shown, a handrail 12 is fixedly connected to the vehicle body 1, and a movable wheel 13 is installed on the vehicle body 1. Pushing the handrail 12 and cooperating with the movable wheel 13, the concrete road surface is moved and cut. At the same time, it is observed whether the cut line is located between the two positioning clamps 86 during the movement, so as to perform positioning.

[0031] like Figure 1-4 As shown, two limiting frames 14 are fixedly connected to the vehicle body 1. Both sides of the connecting frame 3 are fixedly connected to sliders 15 that are adapted to the openings of the limiting frames 14. The sliders 15 slide within the adjacent limiting frames 14. The sliders 15 cooperate with the limiting frames 14 to make the connecting frame 3 more stable when it is raised and lowered, and also improve the stability of the cutting blade 11 when it cuts.

[0032] Telescopic pole 2 is an electric telescopic pole. Both the drive motor 5 and telescopic pole 2 are electrically connected to an external power source and to a control unit (not shown in the figure).

[0033] The working principle of the concrete pavement cutting device in this embodiment is as follows: During use, the blocking frame 7 can prevent the curtain 6 from sticking to the cutting blade 11 due to changes in air pressure, thereby avoiding damage to the curtain 6 by the cutting blade 11; by rotating the two threaded rods 84, the distance between the two moving plates 83 is changed, thereby adapting and adjusting the distance between the two positioning clamps 86 according to the width of the cutting line. When the device is pushed to cut the joint, the cutting line is always located between the two positioning clamps 86. Because the distance between the two positioning clamps 86 is adjusted according to the width of the cutting line, the probability of errors during observation is reduced.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A concrete pavement joint cutting device, characterized in that: The vehicle includes a vehicle body (1), on which a telescopic rod (2) is fixedly installed. A connecting frame (3) is fixedly connected to the telescopic end of the telescopic rod (2). A protective frame (4) is fixedly connected to the connecting frame (3). A cutting blade (11) is rotatably connected inside the protective frame (4). The rotating shaft of the cutting blade (11) is fixedly connected to the output end of a drive motor (5). A curtain (6) and a blocking frame (7) are fixedly connected to the lower end of the protective frame (4). The curtain (6) is fitted onto the blocking frame (7). A positioning device is provided on the vehicle body (1). The positioning mechanism (8) includes two mounting plates (81) fixed to the vehicle body (1), a slide rod (82) fixed between the two mounting plates (81), two movable plates (83) sliding on the slide rod (82), a threaded rod (84) rotatably connected between the two mounting plates (81), the threaded rod (84) passing through and screwed to the two movable plates (83), a throttle handle (85) fixed to one end of the threaded rod (84), and a positioning clamp (86) fixed to the lower end of the movable plate (83).

2. The concrete pavement cutting device according to claim 1, characterized in that: The threaded rod (84) is provided with two threaded sections with opposite patterns, and the two movable plates (83) are located on different threaded sections.

3. A concrete pavement joint cutting device according to claim 2, characterized in that: The lower end of the positioning clamp (86) is at most two centimeters above the road surface.

4. A concrete pavement cutting device according to claim 3, characterized in that: The positioning clamp (86) is coated with a bright color.

5. A concrete pavement joint cutting device according to claim 1, characterized in that: A sinking frame (9) is fitted on the blocking frame (7). The sinking frame (9) is fixed to the lower end of the curtain (6). An adjustment limiting mechanism (10) is provided between the sinking frame (9) and the protective frame (4).

6. A concrete pavement joint cutting device according to claim 5, characterized in that: The adjustment limiting mechanism (10) includes a first horizontal plate (101) fixed to the protective frame (4) and a second horizontal plate (102) fixed to the sinking frame (9). A vertical plate (103) is fixed on the second horizontal plate (102), and the vertical plate (103) passes through and slides on the first horizontal plate (101).

7. A concrete pavement joint cutting device according to claim 6, characterized in that: The upright plate (103) has multiple positioning slots (104) evenly spaced along its length, and insert plates (105) are inserted into the positioning slots (104).

8. A concrete pavement joint cutting device according to claim 1, characterized in that: The vehicle body (1) is equipped with movable wheels (13).

9. A concrete pavement joint cutting device according to claim 8, characterized in that: Handrails (12) are fixedly attached to the vehicle body (1).

10. A concrete pavement cutting device according to claim 1, characterized in that: Two limiting frames (14) are fixedly connected to the vehicle body (1), and sliders (15) are fixedly connected to both sides of the connecting frame (3). The sliders (15) slide within the limiting frames (14).

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