Joint cutter for pavement construction

Abstract

The utility model discloses a joint cutter for pavement construction, which relates to the technical field of pavement construction and structurally comprises a joint cutter body, a cutting gear is mounted on the side surface of the joint cutter body in a driving manner, the joint cutter further comprises a protective cover, the protective cover for protecting the cutting gear is fixedly mounted on the side surface of the joint cutter body, and the protective cover is fixedly mounted on the side surface of the joint cutter body. The protective cover is located outside the cutting gear and comprises an outer shell, the outer shell is fixedly connected with the side face of the joint cutter body, and a front baffle and a rear baffle are integrally formed on the front side and the rear side of the outer shell respectively. The stone rebounding effect is reduced, the situation that the stone rebounds and damages the surface of the cutting gear and influences the joint cutting effect of the cutting gear is prevented, the rubber pad is arranged for buffering part of stone or residues entering the cavity, and hard damage of the stone or residues to the inner wall of the cavity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of road construction, in particular to a seam cutter used for road construction. Background Art

[0002] The seam cutter is used in road construction. Its main purpose is to cut expansion joints horizontally on the newly paved cement road surface. During the cutting process, the seam cutter will cause stones or residues to splash, causing safety hazards. Therefore, a blocking structure is required to improve the safety of the seam cutter.

[0003] A road seam cutting machine with patent publication number CN207244417U includes a seam cutting head, and the seam cutting head includes a mounting frame, a saw blade, a lead screw, a sliding rod, and a dust reduction rod; the mounting frame includes a dust reduction frame and a cutter head frame; the cutter head frame is connected end to end in a ring shape; the saw blade is rotatably installed between the cutter head frames through the saw blade shaft; the dust reduction frame is a U-shaped frame with an opening downward, and the two ends of the opening are respectively installed on both sides of the cutter head frame; the lead screw and the two ends of the sliding rod are respectively installed on both sides of the middle of the dust reduction frame and the two sides of the opening, and the middle of the lead screw is installed with a lead screw nut with opposite threads on both sides; the dust reduction rod is symmetrically arranged on both sides of the lead screw nut, the upper end is installed in cooperation with the lead screw, and the lower end is sleeved on the surface of the sliding rod, arranged vertically downward, and a dust reduction nozzle is installed inward. The utility model has a novel structure, low production and manufacturing cost, and is easy to use; it can ensure that the dust and gravel particles generated during seam cutting are dust-reduced, absorbed, and shielded, and can ensure the cleanliness of the construction environment and the safety of the construction;

[0004] This patent can block flying stones and improve construction safety, but it achieves this function through dust reduction nozzles. When the flying stone particles are large, the water mist does not have the ability to block them. Increasing the blocking ability by increasing the amount of water spray will cause a waste of water resources. The baffle set in this patent can also block some stones, but when the kinetic energy of the flying stones is large, they will be bounced back to the surface of the saw blade by the baffle, thereby damaging the saw blade. Utility Model Content

[0005] The purpose of the utility model is to provide a seam cutting machine for road construction to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a seam cutter for road construction, comprising a seam cutter body, a side drive of the seam cutter body being provided with a cutting gear, and further comprising:

[0007] A protective cover for protecting the cutting gear, the protective cover is fixedly mounted on the side of the slitting machine body, and the protective cover is located outside the cutting gear;

[0008] The protective cover comprises an outer shell, the outer shell is fixedly connected to the side of the slitting machine body, the front and rear sides of the outer shell are respectively integrally formed with a front baffle and a rear baffle, the side of the front baffle and the rear baffle close to the cutting gear are both provided with a cavity, a mesh plate is slidably installed inside the cavity, and the mesh plate is used to reduce the kinetic energy of splashing residues and pebbles through the friction of its own mesh;

[0009] A buffer mechanism is used to buffer the grid plate. The buffer mechanism passes through a side wall of the cavity away from the cutting gear, and a telescopic end of the buffer mechanism is fixedly connected to the grid plate.

[0010] Preferably, a connection block is fixedly connected to the top of the grid plate, and the grid plate is slidably installed inside the cavity through the connection block.

[0011] Preferably, the buffer mechanism includes a T-shaped telescopic rod, a side wall of the cavity away from the cutting gear is penetrated by a plurality of buffer tubes, the telescopic rod is slidably installed inside the buffer tube, and the outer end of the telescopic rod slides through the side wall of the buffer tube and is fixedly connected to the grid plate through a connecting block, and a spring is fixedly connected between the inner end of the telescopic rod and the inner wall of the buffer tube.

[0012] Preferably, an air flow groove is provided on one side wall of the outer end of the buffer cylinder, and a baffle is installed on the outer end of the air flow groove by rotation of a coil spring, and the baffle is used to block the outer end of the air flow groove, and a limiting block is fixedly provided on the inner wall of the air flow groove, and the movable end of the limiting block is pressed against the inner side surface of the baffle, and the baffle is provided with an air hole.

[0013] Preferably, a rubber pad is fixedly provided on the inner wall of the cavity on one side opposite to the grid plate.

[0014] Preferably, the front baffle is arranged to be inclined toward the front side, and the rear baffle is arranged to be inclined toward the rear side.

[0015] Preferably, the bottom end height of the rear baffle is lower than the bottom end height of the front baffle.

[0016] Preferably, the mesh diameter of the grid plate is set to 0.5CM-1CM.

[0017] Preferably, the telescopic rod and the buffer cylinder are sealed and slidably arranged.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model is provided with a mesh plate with mesh holes, which can consume the kinetic energy of the splashing stones through the mesh holes, reduce the rebound effect of the stones, prevent the stones from rebounding and damaging the surface of the cutting gear, and affect the cutting effect of the cutting gear. The rubber pad is provided to buffer part of the stones or residues entering the cavity, thereby reducing the hard damage to the inner wall of the cavity;

[0020] 2. The utility model sets a sliding mesh plate. When the splashing stones hit the mesh plate, they will squeeze the mesh plate inward, and the mesh plate squeezes the spring through the telescopic rod, so as to achieve a buffering effect, which is used to reduce the hard damage of the stones to the mesh plate;

[0021] 3. The utility model sets a sealing sliding between the telescopic rod and the buffer cylinder. When the mesh plate is squeezed, the telescopic rod slides inside the buffer cylinder, the gas inside the buffer cylinder is squeezed, and the baffle is pushed to rotate outward, the gas is squeezed out smoothly, and the kinetic energy of the stone is converted into the elastic potential energy of the spring, and the spring rebounds afterwards. Therefore, the external air is sucked into the interior of the buffer cylinder due to the sliding of the telescopic rod, but the baffle cannot rotate inward, so the external air can only enter through the tiny pores, and the air resistance will consume part of the elastic potential energy of the spring, thereby reducing the rebound speed of the mesh plate, preventing the stone from being re-endowed with kinetic energy by the mesh plate and hitting the cutting gear;

[0022] 4. The utility model sets the front baffle on the rear side to be longer than the outer shell on the front side. Since the rotation direction of the cutting gear is clockwise, the residues and stones are mainly splashed to the rear side. Therefore, this setting can better block the residues and stones. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of the utility model;

[0024] Figure 2 It is a side sectional view of the cutting gear and the protective cover of the utility model;

[0025] Figure 3 For the utility model Figure 2 A magnified schematic diagram of the structure at center A;

[0026] Figure 4 For the utility model Figure 3 Schematic diagram of some structures in ;

[0027] Figure 5 It is a front sectional schematic diagram of the protective cover of the utility model.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. Slitting machine body; 2. Cutting gear; 3. Protective cover; 31. Outer shell; 32. Front baffle; 33. Rear baffle; 4. Cavity; 5. Grid plate; 6. Buffer cylinder; 61. Telescopic rod; 62. Spring; 63. Connecting block; 64. Air flow groove; 65. Baffle; 66. Limit block; 67. Air hole; 7. Rubber pad. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figures 1 to 5 , the utility model provides a technical solution:

[0032] A seam cutter for road construction, comprising a seam cutter body 1, a cutting gear 2 being driven and installed on the side of the seam cutter body 1, and further comprising:

[0033] A protective cover 3, used for protecting the cutting gear 2, is fixedly mounted on the side of the slitting machine body 1, and is located outside the cutting gear 2;

[0034] The protective cover 3 includes an outer shell 31, and the outer shell 31 is fixedly connected to the side of the slitting machine body 1. The front and rear sides of the outer shell 31 are respectively integrally formed with a front baffle 32 and a rear baffle 33. The front baffle 32 and the rear baffle 33 are both provided with a cavity 4 on one side close to the cutting gear 2. A mesh plate 5 is slidably installed inside the cavity 4. The mesh plate 5 is used to reduce the kinetic energy of splashing residues and small stones through the friction of its own mesh.

[0035] A buffer mechanism is used to buffer the mesh plate 5 . The buffer mechanism penetrates a side wall of the cavity 4 away from the cutting gear 2 , and a telescopic end of the buffer mechanism is fixedly connected to the mesh plate 5 .

[0036] First embodiment

[0037] The top of the mesh plate 5 is fixedly connected with a connecting block 63, and the mesh plate 5 is slidably installed inside the cavity 4 through the connecting block 63. A rubber pad 7 is fixedly provided on the inner wall of the cavity 4 on one side opposite to the mesh plate 5, and the mesh diameter of the mesh plate 5 is set to 0.5CM-1CM.

[0038] The buffer mechanism includes a T-shaped telescopic rod 61, and a plurality of buffer tubes 6 are provided through a side wall of the cavity 4 away from the cutting gear 2. The telescopic rod 61 is slidably installed inside the buffer tube 6, and the outer end of the telescopic rod 61 slides through the side wall of the buffer tube 6 and is fixedly connected to the grid plate 5 through a connecting block 63. A spring 62 is fixedly connected between the inner end of the telescopic rod 61 and the inner wall of the buffer tube 6.

[0039] During operation, by setting the mesh diameter of the mesh plate 5 to 0.5CM-1CM, when the mesh plate 5 collides with stones, some larger stones will be temporarily stuck by the mesh holes of the mesh plate 5 due to their irregular shapes, while some stones will pass through the mesh holes of the mesh plate 5 and produce friction with the inner wall of the pores, thereby consuming the kinetic energy of the stones and finally falling into the cavity 4. Setting the mesh plate 5 can reduce the rebound effect of the stones, prevent the stones from rebounding and damaging the surface of the cutting gear 2, and affect the cutting effect of the cutting gear 2. In addition, by setting the rubber pad 7 to buffer some stones or residues entering the cavity 4, reduce their hard damage to the inner wall of the cavity 4, and by setting the sliding mesh plate 5, when the flying stones collide with the mesh plate 5, they will squeeze the mesh plate 5 inward, and the mesh plate 5 will squeeze the spring 62 through the telescopic rod 61, so as to achieve a buffering effect, which is used to reduce the hard damage of the stones to the mesh plate 5.

[0040] Second embodiment

[0041] An air flow groove 64 is provided on one side wall of the outer end of the buffer tube 6, and a baffle 65 is installed on the outer end of the air flow groove 64 through a coil spring for rotation. The baffle 65 is used to block the outer end of the air flow groove 64, and a limit block 66 is fixedly provided on the inner wall of the air flow groove 64. The movable end of the limit block 66 is pressed against the inner side surface of the baffle 65, and the baffle 65 is provided with an air hole 67. A sealing sliding arrangement is provided between the telescopic rod 61 and the buffer tube 6.

[0042] During operation, due to the sealed sliding arrangement between the telescopic rod 61 and the buffer tube 6, when the grid plate 5 is squeezed, the telescopic rod 61 slides inside the buffer tube 6, and the gas inside the buffer tube 6 is squeezed into the inside of the air flow groove 64, and drives the baffle 65 to rotate outward, so that the gas flows out smoothly, and the kinetic energy of the stone is converted into the elastic potential energy of the spring 62, and the spring 62 then rebounds, driving the telescopic rod 61 to slide outward, so that the outside air is sucked into the inside of the buffer tube 6, but due to the setting of the limit block 66, the baffle 65 cannot rotate to the inside of the buffer tube 6, so the outside air can only pass through the baffle 6 5 enters the interior of the buffer tube 6. Since the air hole 67 is set small, the telescopic rod 61 encounters a large resistance when sliding outward. The resistance consumes part of the elastic potential energy of the spring 62, thereby reducing the rebound speed of the spring 62, and then indirectly reducing the rebound speed of the grid plate 5. Compared with directly using the spring 62 as a buffer medium, the device can greatly reduce the rebound force of the spring 62, so that the stones splashed onto the surface of the grid plate 5 fall directly after releasing the kinetic energy, instead of being re-endowed with kinetic energy by the elastic potential energy and hitting the cutting gear 2, thereby causing damage to the cutting gear 2.

[0043] Third embodiment

[0044] The front baffle plate 32 is tilted toward the front side, and the rear baffle plate 33 is tilted toward the rear side. The bottom end height of the rear baffle plate 33 is lower than the bottom end height of the front baffle plate 32 .

[0045] During operation, since the cutting gear 2 rotates clockwise, the debris and stones mainly splash to the rear side, so the front baffle 32 arranged on the rear side is longer than the outer shell 31 on the front side, which can better block the debris and stones.

[0046] Working principle: When the seam cutter body 1 is started, it drives the cutting gear 2 to rotate at a high speed, thereby starting to cut the seam on the road surface. The protective cover 3 is provided to block the debris and small stones splashed during the seam cutting. Since the rotation direction of the cutting gear 2 is clockwise, the debris and stones are mainly splashed to the rear side, so the front baffle 32 provided on the rear side is longer than the outer shell 31 on the front side, which can better block the debris and stones;

[0047] By setting the mesh plate 5 with mesh holes, when the mesh plate 5 collides with stones, some stones with larger volumes will be temporarily stuck by the mesh holes of the mesh plate 5 due to their irregular shapes, while some stones will pass through the mesh holes of the mesh plate 5 and generate friction with the inner wall of the pores, thereby consuming the kinetic energy of the stones and finally falling into the cavity 4. Therefore, compared with the baffle plate without pores, the mesh plate 5 can reduce the rebound effect of the stones, thereby preventing the stones from rebounding to the surface of the cutting gear 2, causing damage to the cutting gear 2, and affecting the cutting effect of the cutting gear 2. The rubber pad 7 is provided to buffer some stones or residues entering the cavity 4, thereby reducing their hard damage to the inner wall of the cavity 4.

[0048] By setting a sliding mesh plate 5, when the flying stones collide with the mesh plate 5, the mesh plate 5 will be squeezed inwardly, and the mesh plate 5 will squeeze the spring 62 through the telescopic rod 61, so as to achieve a buffering effect, which is used to reduce the hard damage of the stones to the mesh plate 5. Since the telescopic rod 61 and the buffer tube 6 are sealed and slidable, when the mesh plate 5 is squeezed, the telescopic rod 61 slides inside the buffer tube 6, and the gas inside the buffer tube 6 is squeezed into the inside of the air flow groove 64, and the baffle 65 that blocks the air flow groove 64 is rotated outwardly due to the gas pressure, and the gas is squeezed out smoothly. The kinetic energy of the stone is converted into the elastic potential energy of the spring 62, and the spring 62 then rebounds, driving the telescopic rod 61 to slide outward, so that the external air is sucked into the buffer tube 6 , but due to the setting of the limit block 66, the baffle 65 cannot rotate toward the inside of the buffer tube 6, so the external air can only enter the inside of the buffer tube 6 through the air hole 67 opened by the baffle 65. Since the air hole 67 is set small, the telescopic rod 61 encounters a large resistance when sliding outward, and this resistance consumes part of the elastic potential energy of the spring 62, thereby reducing the rebound speed of the spring 62, and then indirectly reducing the rebound speed of the grid plate 5. Compared with directly using the spring 62 as a buffer medium, the present device can greatly reduce the rebound force of the spring 62, so that the stones splashed onto the surface of the grid plate 5 fall directly after releasing the kinetic energy, instead of being re-endowed with kinetic energy by the elastic potential energy and hitting the cutting gear 2, thereby causing damage to the cutting gear 2.

[0049] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seam cutter for road construction, comprising a seam cutter body (1), a cutting gear (2) being mounted on the side of the seam cutter body (1), characterized in that: Also includes: A protective cover (3), used for protecting the cutting gear (2), the protective cover (3) being fixedly mounted on the side of the slitting machine body (1), the protective cover (3) being located outside the cutting gear (2); The protective cover (3) comprises an outer shell (31), the outer shell (31) is fixedly connected to the side of the slitting machine body (1), and a front baffle (32) and a rear baffle (33) are respectively integrally formed on the front and rear sides of the outer shell (31), and a cavity (4) is provided on a side of the front baffle (32) and the rear baffle (33) close to the cutting gear (2), and a mesh plate (5) is slidably installed inside the cavity (4), and the mesh plate (5) is used to reduce the kinetic energy of splashing residues and small stones through the friction of its own mesh holes; A buffer mechanism is used to buffer the mesh plate (5), the buffer mechanism penetrating a side wall of the cavity (4) away from the cutting gear (2), and the telescopic end of the buffer mechanism is fixedly connected to the mesh plate (5).

2. A seam cutting machine for road construction according to claim 1, characterized in that: A connection block (63) is fixedly connected to the top of the grid plate (5), and the grid plate (5) is slidably installed inside the cavity (4) via the connection block (63).

3. A seam cutting machine for road construction according to claim 2, characterized in that: The buffer mechanism comprises a T-shaped telescopic rod (61); a plurality of buffer tubes (6) are provided through a side wall of the cavity (4) away from the cutting gear (2); the telescopic rod (61) is slidably mounted inside the buffer tube (6); the outer end of the telescopic rod (61) slides through the side wall of the buffer tube (6) and is fixedly connected to the grid plate (5) via a connecting block (63); a spring (62) is fixedly connected between the inner end of the telescopic rod (61) and the inner wall of the buffer tube (6).

4. A seam cutting machine for road construction according to claim 3, characterized in that: A side wall of the outer end of the buffer tube (6) is provided with an air flow groove (64), and a baffle (65) is rotatably mounted on the outer end of the air flow groove (64) through a coil spring, and the baffle (65) is used to block the outer end of the air flow groove (64). A limit block (66) is fixedly provided on the inner wall of the air flow groove (64), and the movable end of the limit block (66) is pressed against the inner side surface of the baffle (65), and the baffle (65) is provided with an air hole (67).

5. A seam cutting machine for road construction according to claim 4, characterized in that: A rubber pad (7) is fixedly provided on the inner wall of one side of the cavity (4) opposite to the grid plate (5).

6. A seam cutting machine for road construction according to claim 1, characterized in that: The front baffle (32) is arranged to be inclined toward the front side, and the rear baffle (33) is arranged to be inclined toward the rear side.

7. A seam cutting machine for road construction according to claim 6, characterized in that: The bottom end height of the rear baffle (33) is lower than the bottom end height of the front baffle (32).

8. A seam cutting machine for road construction according to any one of claims 1 to 7, characterized in that: The mesh diameter of the mesh plate (5) is set to 0.5CM-1CM.

9. A seam cutting machine for road construction according to claim 3, characterized in that: The telescopic rod (61) and the buffer cylinder (6) are arranged in a sealed sliding manner.

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