Pavement joint cutting device for highway engineering construction

Abstract

The utility model discloses a road surface joint cutting device for highway engineering construction, which comprises sawteeth and a mounting shaft, the sawteeth are coaxially arranged at the front end of the mounting shaft, the front end of the mounting shaft is connected with a quick-connection clamping machine tool, and the quick-connection clamping machine tool comprises an outer cylinder, a plurality of fixed clamping rods, a plurality of reset springs and a transmission block. The fixing clamping rods are vertically installed on the outer cylinder in a telescopic mode, and the reset springs are connected to the head ends of the fixing clamping rods and the interior of an inner ring of the outer cylinder respectively. According to the road surface joint cutting device for highway engineering construction, a supporting rod in a one-way pressing rod is manually or automatically extruded, then the tail end of a T-shaped rod is rotated in the forward direction or the reverse direction, and through a series of transmission of a hinge rod, hydraulic oil, a transmission block, four rotating rollers and two bevel wheel carriers, balls at the tail ends of two fixing clamping rods are driven to stretch out and draw back; compared with multi-circle bolt screwing, only the tail end of the T-shaped rod needs to be rotated and wrenched, and the supporting rod in the one-way pressing rod is manually or automatically extruded, so that rapidness and convenience are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of road surface cutting machines, in particular to a road surface cutting device for highway engineering construction. Background Art

[0002] Pavement cutting machines are essential construction machinery in concrete road construction projects. They are designed to provide professional cutting services for municipal construction renovation, pavement maintenance and construction, airport pavement cutting, communication engineering burial, and on-site operations such as floors and driveways. At the same time, they can cut and groove concrete products and marble and granite products of various specifications. During the use of the pavement cutting machine, different types of saw blades need to be replaced to cut new and old concrete and asphalt pavements in different states. After cutting hard objects for a long time, the saw blades are too worn and need to be replaced regularly.

[0003] Traditional saw blades are mainly fixed on the rotating shaft of the road cutting machine by bolts. The bolts need to be tightened multiple times, which is not fast enough. In order to install the saw blade more quickly, improve the efficiency of replacing the saw blade, and fix the saw blade more stably, a road cutting device for highway engineering construction is proposed. Utility Model Content

[0004] The utility model aims to solve the problem of low installation efficiency of fixed saw blades through bolts in the road cutting machine in the prior art, and proposes a road cutting device for highway engineering construction.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A road surface cutting device for highway engineering construction comprises a saw tooth and a mounting shaft, wherein the saw tooth is coaxially arranged at the front end of the mounting shaft, and the front end of the mounting shaft is connected with a quick-connect clamping tool;

[0007] The quick-connect clamping device includes an outer cylinder, a plurality of fixed clamping rods, a plurality of return springs and a transmission block. The plurality of fixed clamping rods are vertically telescopically installed on the outer cylinder. The plurality of return springs are respectively connected to the head end of the fixed clamping rod and the inner circle of the outer cylinder. The fixed clamping rod is used to automatically retract and reset inward by the elastic force of the return spring. The plurality of fixed clamping rods are pushed by the inclined surface of the transmission block when in a moving state, so as to extend outward along the guide hole in the outer cylinder.

[0008] Preferably, a guide groove is provided at the front end of the installation shaft, the transmission block is sealingly slidably installed in the guide groove, the rear end of the guide groove is connected to a cylindrical cavity, the front end of the cylindrical cavity is provided with an oiling nozzle, and the rear end of the installation shaft is connected to a composite drive tool.

[0009] Preferably, the compound drive tool includes a connecting seat, a one-way pressure rod and a piston, the front end of the connecting seat and the rear end of the inner cavity of the cylindrical cavity are connected to each other, the piston is telescopically installed in the cylindrical cavity, and the one-way pressure rod is connected to the piston through the hinge rod.

[0010] Preferably, the one-way pressure rod is composed of a T-shaped rod, a support rod, a thrust spring, a lifting frame and a triangular block, the head end of the T-shaped rod is rotatably mounted on the connecting seat, the head end of the support rod is rotatably mounted on the T-shaped rod, the thrust spring is extruded and installed in the middle end of the T-shaped rod, the lifting frame is extruded and installed on the top end of the thrust spring, the lifting frame is telescopically mounted on the T-shaped rod, and the triangular block is fixedly mounted on the top end of the lifting frame.

[0011] Preferably, the connecting seat is provided with a plurality of slots corresponding to the triangular block, and a mesh cover is provided in the front end inner cavity of the cylindrical cavity.

[0012] Preferably, a cover plate is connected to the outer end of the outer cylinder, a plurality of fixed plates are fixedly arranged inside the outer cylinder, the return spring is connected to the fixed plate, a bevel wheel frame and two rollers are arranged between the fixed clamp rod and the inclined surface of the transmission block, the two rollers are rotatably installed on the bevel wheel frame, the bevel wheel frame and the head end of the fixed clamp rod are fixedly connected, and the rollers are in extrusion contact with the inclined surface of the transmission block.

[0013] Compared with the prior art, the utility model provides a road surface cutting device for highway engineering construction, which has the following beneficial effects:

[0014] 1. The road surface cutting device for highway engineering construction, by manually or automatically squeezing the support rod in the one-way pressure rod, and then rotating the end of the T-shaped rod forward or reversely, and through a series of transmissions of a hinge rod, hydraulic oil, a transmission block, four rollers and two inclined wheel frames, is used to drive the balls at the ends of the two fixed clamping rods to extend and retract, clamp the circular pad and the saw teeth or release the clamping of the circular pad and the saw teeth. Compared with tightening the bolts for multiple turns, it only needs to rotate the end of the T-shaped rod and cooperate with manually or automatically squeezing the support rod in the one-way pressure rod, which is faster and more convenient, and achieves the purpose of improving the efficiency of replacing the saw blade.

[0015] 2. The pavement cutting device for highway engineering construction has elastic potential energy accumulated in the compressed hydraulic oil and the rubber gasket in the squeezed circular pad, which has stronger extrusion force and can compensate for the loose part, so as to extrude and fix the saw teeth more stably. At the same time, the saw teeth can be shock-absorbing and buffered by the high-damping rubber gasket inside the circular pad and the high-damping elasticity of the compressed hydraulic oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic diagram of the structure of a road surface cutting device for highway engineering construction proposed by the utility model Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of a road surface cutting device for highway engineering construction proposed by the utility model Figure 2 ;

[0018] Figure 3 This is a cross-sectional view of a road surface cutting device for highway engineering construction proposed by the utility model;

[0019] Figure 4 This is an exploded view of a road surface cutting device for highway engineering construction proposed by the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the installation shaft in a road surface cutting device for highway engineering construction proposed by the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of a composite driving machine in a road surface cutting device for highway engineering construction proposed by the utility model;

[0022] Figure 7 This is a schematic diagram of the structure of a one-way pressure rod in a composite driving tool in a road surface cutting device for highway engineering construction proposed by the utility model;

[0023] Figure 8 The utility model is a schematic structural diagram of a quick-connect clamping tool in a pavement cutting device for highway engineering construction.

[0024] In the figure: 1. sawtooth; 2. mounting shaft; 21. oiling nozzle; 22. mesh cover; 23. cylindrical cavity; 24. guide groove; 3. bearing; 4. gear one; 5. compound drive device; 51. connecting seat; 52. T-bar; 53. hinge rod; 54. piston; 55. support rod; 56. thrust spring; 57. lifting frame; 58. triangular block; 59. slot; 6. circular pad; 7. quick-connect clamping device; 71. cover plate; 72. outer cylinder; 73. fixed clamping rod; 74. fixed plate; 75. inclined wheel frame; 76. reset spring; 77. roller; 78. transmission block. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] Reference Figure 1-8 A road surface cutting device for highway engineering construction comprises a sawtooth 1, a circular mounting hole is arranged on the central axis of the sawtooth 1, four positioning holes arranged in a matrix are arranged on the periphery of the mounting hole, a mounting shaft 2 is installed in the mounting hole in the sawtooth 1, the sawtooth 1 is coaxially arranged at the front end of the mounting shaft 2, the front end outer diameter of the mounting shaft 2 is smaller than the rear end outer diameter, the front end outer diameter of the mounting shaft 2 is the same as the inner diameter of the mounting hole, that is, the sawtooth 1 is coaxially sleeved on the front end of the mounting shaft 2, the rear end outer diameter of the mounting shaft 2 is larger than the outer diameter of the mounting hole, and is used to limit the rear side end face of the sawtooth 1, and four positioning columns 25 are fixedly connected to the periphery of the front end of the mounting shaft 2, and the four positioning columns 25 are respectively arranged in the four positioning holes.

[0028] In this embodiment, a guide groove 24 is provided inside the front end of the mounting shaft 2, and a cylindrical cavity 23 which is interconnected is provided at the rear end of the guide groove 24. An oiling nozzle 21 is fixedly provided at the front end of the cylindrical cavity 23. The front end inner cavity of the cylindrical cavity 23 is filled with hydraulic oil. A mesh cover 22 is slidingly provided in the front end inner cavity of the cylindrical cavity 23 so as to fit in with each other. The friction between the mesh cover 22 and the inner wall of the cylindrical cavity 23 is used to ensure that the mesh cover 22 is provided at the front end of the inner cavity of the cylindrical cavity 23, and is mainly used to prevent the transmission block 78 in the following quick-connect clamping device 7 from disengaging from the guide groove 24 backwards, that is, the transmission block 78 is sealingly slidably installed in the guide groove 24, and the front end of the transmission block 78 is triangular and the rear end is rectangular.

[0029] In this embodiment, the front end of the mounting shaft 2 is connected with a quick-connect clamping device 7, which includes an outer cylinder 72, two fixed clamping rods 73, four return springs 76 and a transmission block 78. The rear end of the outer cylinder 72 is fixedly connected to the front end of the mounting shaft 2 by a coaxial thread. The outer diameter of the outer cylinder 72 is smaller than the inner diameter of the mounting hole. The production is segmented to reduce the production difficulty. The two fixed clamping rods 73 are vertically telescopically installed on the outer cylinder 72, that is, the central axis of the fixed clamping rod 73 and the central axis of the outer cylinder 72 are perpendicular to each other. The end of the fixed clamping rod 73 is a sphere, which is mainly used to provide a clamping force, that is, the sphere and the outer side of the steel sheet on the outer side of the circular pad 6 are in contact with each other.

[0030] The outer end of the outer cylinder 72 is clamped with a cover plate 71, and two fixing plates 74 are fixedly arranged inside the outer cylinder 72. The two fixing plates 74 are on the same straight line and located in the radial direction of the outer cylinder 72. The head ends of four return springs 76 are respectively fixedly installed on the end surfaces of both sides of the two fixing plates 74, and the tail ends of the four return springs 76 are respectively fixedly installed on the head ends of the two fixing clamping rods 73, that is, the four return springs 76 are respectively connected to the head ends of the fixing clamping rods 73 and the two fixing plates 74 in the inner circle of the outer cylinder 72;

[0031] The reset spring 76 in the present application is always in a stretched state, and the fixed clamp rod 73 is used to automatically retract and reset inward through the elastic force of the reset spring 76. The two fixed clamp rods 73 are pushed by the inclined surface of the transmission block 78 when in the moving state, and are used to extend outward along the guide hole in the outer cylinder 72. A bevel wheel frame 75 and two rollers 77 are provided between the fixed clamp rod 73 and the inclined surface of the transmission block 78. The two rollers 77 are rotatably installed on the bevel wheel frame 75. The connecting line of the two rollers 77 and the inclined surface of the transmission block 78 are parallel to each other. The bevel wheel frame 75 and the head end of the fixed clamp rod 73 are fixedly connected, and the inclined surfaces of the rollers 77 and the transmission block 78 are squeezed in contact and rolled in connection.

[0032] In this embodiment, the rear end of the mounting shaft 2 is connected with a composite drive tool 5, which includes a connecting seat 51, a one-way pressure rod and a piston 54. The front end of the connecting seat 51 is fixedly provided with an external threaded joint, which is threadedly installed in the rear end of the inner cavity of the cylindrical cavity 23 through the external threaded joint. The piston 54 is sealed and telescopically installed in the cylindrical cavity 23, that is, the hydraulic oil filled in the cylindrical cavity 23 is arranged between the piston 54 and the transmission block 78. The rear end of the connecting seat 51 is provided with a rectangular groove for installing the one-way pressure rod. The one-way pressure rod is connected to the piston 54 through a hinge rod 53. The hinge rod 53 passes through the connecting seat 51 and is arranged at the rear end of the cylindrical cavity 23.

[0033] The one-way pressure rod is composed of a T-shaped rod 52, a support rod 55, a thrust spring 56, a lifting frame 57 and a triangular block 58. The first and second ends of the hinge rod 53 are respectively hinged to the T-shaped rod 52 and the piston 54. The first end of the T-shaped rod 52 is rotatably mounted on the connecting seat 51. The support rod 55 slides through the two sides of the lifting frame 57. The first end of the support rod 55 is rotatably mounted on the T-shaped rod 52. The lifting frame 57 described below is mainly pressed downward by the lever principle. The thrust spring 56 is squeezed and installed in the middle end of the T-shaped rod 52. The lifting frame 57 is squeezed and installed on the top end of the thrust spring 56, that is, the thrust spring 56 is always in a compressed state. The elastic force of the thrust spring 56 is used to automatically push the lifting frame 57 upward.

[0034] The lifting frame 57 is telescopically installed on the T-shaped rod 52, and the triangular block 58 is fixedly installed on the top of the lifting frame 57. The cross-section of the triangular block 58 is a right triangle. When the T-shaped rod 52 rotates close to the mounting axis 2, the inclined surface of the triangular block 58 faces downward, and the inner wall of the rectangular groove or the inner wall of the slot 59 will push the inclined surface of the triangular block 58 to be compressed into the T-shaped rod 52. The connecting seat 51 is provided with a plurality of slots 59 corresponding to the triangular block 58. The inner cavity of the slot 59 and the outer shape of the triangular block 58 are consistent with each other. When the T-shaped rod 52 rotates away from the mounting axis 2, the slot 59 will limit the movement of the triangular block 58, thereby realizing the unidirectional movement of the T-shaped rod 52. When the T-shaped rod 52 is to be rotated away from the mounting axis 2, only the end of the support rod 55 needs to be close to the end of the T-shaped rod 52 to compress the triangular block 58 into the T-shaped rod 52.

[0035] It should be added that, because the rear end of the installation shaft 2 in the present application is provided with a composite driving device 5, it is impossible to directly coaxially and fixedly connect with the output shaft of the road cutting machine in the prior art through a coupling, so a gear 1 4 is coaxially and fixedly installed on the periphery of the installation shaft 2, and then a gear 2 meshing with the gear 1 4 is coaxially and fixedly installed on the output shaft of the original road cutting machine, that is, the gear 1 4 and the gear 2 mesh with each other, and then the periphery of the installation shaft 2 is rotatably installed on the frame of the original road cutting machine through the bearing 3, the inner ring of the bearing 3 is fixedly connected to the installation shaft 2, and the outer ring of the installation shaft 2 is fixedly connected to the frame;

[0036] Secondly, a circular pad 6 is arranged between the fixed clamp rod 73 and the outer side of the saw tooth 1. The outer end face of the circular pad 6 is composed of a steel sheet with high mechanical strength, and the inner end face of the circular pad 6 is composed of a rubber gasket with high damping strength. The inner ring of the circular pad 6 is sleeved on the front end of the mounting shaft 2. The squeezed rubber gasket can, on the one hand, accumulate a certain elastic squeezing force, thereby making the installation of the saw tooth 1 more stable, and on the other hand, the high-damping rubber gasket can reduce the shock of the rotating saw tooth 1.

[0037] In the utility model, the replacement steps of the saw teeth 1 in the road surface cutting device for highway engineering construction are as follows:

[0038] 1) Use your hands or pliers to press the end of the support rod 55 down close to the end of the T-shaped rod 52, and use the principle of leverage to more effortlessly retract the lifting frame 57 and the triangular block 58 into the T-shaped rod 52, so that the triangular block 58 is away from the slot 59;

[0039] 2) After the triangular block 58 is away from the slot 59, the end of the T-shaped rod 52 is manually rotated away from the installation shaft 2, and the piston 54 is driven to move backward along the cylindrical cavity 23 through the hinge rod 53, generating negative pressure and attracting the transmission block 78 to move backward. Moreover, after the triangular block 58 is away from the slot 59, the elastic extrusion force accumulated in the compressed hydraulic oil in the front end of the cylindrical cavity 23 assists the piston 54 to move backward along the cylindrical cavity 23, and assists in rotating the end of the T-shaped rod 52 away from the installation shaft 2;

[0040] After the transmission block 78 moves backward, the restriction on the four return springs 76 is released. The four compressed return springs 76 drive the two fixing clamping rods 73 to contract inwardly along the radial direction of the outer tube 72 through elastic force, so that the ball is away from the circular cushion block 6. In addition, the elastic force accumulated in the rubber gasket whose inner end surface of the circular cushion block 6 is compressed also assists the ball at the end of the fixing clamping rod 73 to contract inwardly.

[0041] 3) Remove the circular pad 6 and the old sawtooth 1 in turn, and replace them with new sawtooth 1 and circular pad 6;

[0042] 4) Manually press or use a sleeve to cover the end of the T-shaped rod 52, rotate the T-shaped rod 52 close to the installation shaft 2, and insert the triangular blocks 58 on the T-shaped rod 52 into a plurality of slots 59 in sequence in one direction to limit the reverse rotation of the T-shaped rod 52. The rotating T-shaped rod 52 presses the piston 54 forward through the hinge rod 53 to compress the hydraulic oil in the cylindrical cavity 23;

[0043] The compressed hydraulic oil is used to transfer kinetic energy, thereby pushing the four rollers 77 on both sides away from each other, and driving the two fixed clamping rods 73 away from each other through the four rollers 77 and the two inclined wheel frames 75, so that the balls at the ends of the two fixed clamping rods 73 protrude outward, gradually clamping the outer side of the circular pad 6 and moving backward along the installation axis 2, so as to stably clamp the sawtooth 1;

[0044] The hydraulic oil under pressure is compressed, and secondly, it is used to accumulate potential energy for more stably clamping the saw teeth 1. Compared with bolt installation, it is more stable because the fixed bolts are easy to loosen when the road cutting machine works for a long time under a certain frequency of vibration.

[0045] In summary, when replacing and installing the saw tooth 1, it is only necessary to rotate and pull the end of the T-shaped rod 52, and cooperate with manual or automatic squeezing of the support rod 55 in the one-way pressure rod. Compared with tightening the bolt multiple times, it is faster and more convenient. In addition, the elastic potential energy accumulated by the compressed hydraulic oil and the rubber gasket in the squeezed circular pad 6 makes the squeezing force stronger, and can also compensate for the loose part, so that the saw tooth 1 can be squeezed and fixed more stably. At the same time, the saw tooth 1 can be shock-absorbing and buffered by the high-damping rubber gasket inside the circular pad 6 and the high-damping elasticity of the compressed hydraulic oil.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A road surface cutting device for highway engineering construction, comprising a saw tooth (1) and a mounting shaft (2), wherein the saw tooth (1) is coaxially arranged at the front end of the mounting shaft (2), and is characterized in that: The front end of the installation shaft (2) is connected to a quick-connect clamping tool (7); The quick-connect clamping device (7) includes an outer cylinder (72), a plurality of fixed clamping rods (73), a plurality of return springs (76) and a transmission block (78). The plurality of fixed clamping rods (73) are vertically telescopically installed on the outer cylinder (72). The plurality of return springs (76) are respectively connected to the head end of the fixed clamping rod (73) and the inner circle of the outer cylinder (72). The fixed clamping rod (73) is used to automatically retract and return to its original position inwardly by the elastic force of the return spring (76). The plurality of fixed clamping rods (73) are pushed by the inclined surface of the transmission block (78) when in a moving state, so as to extend outward along the guide hole in the outer cylinder (72).

2. A road surface cutting device for highway engineering construction according to claim 1, characterized in that: The front end of the installation shaft (2) is provided with a guide groove (24), the transmission block (78) is sealed and slidably installed in the guide groove (24), the rear end of the guide groove (24) is connected to a cylindrical cavity (23), the front end of the cylindrical cavity (23) is provided with an oiling nozzle (21), and the rear end of the installation shaft (2) is connected to a composite drive tool (5).

3. A road surface cutting device for highway engineering construction according to claim 2, characterized in that: The composite driving machine (5) comprises a connecting seat (51), a one-way pressure rod and a piston (54); the front end of the connecting seat (51) and the rear end of the inner cavity of the cylindrical cavity (23) are connected to each other; the piston (54) is telescopically installed in the cylindrical cavity (23); and the one-way pressure rod is connected to the piston (54) via a hinge rod (53).

4. A road surface cutting device for highway engineering construction according to claim 3, characterized in that: The one-way pressure rod is composed of a T-shaped rod (52), a support rod (55), a thrust spring (56), a lifting frame (57) and a triangular block (58); the head end of the T-shaped rod (52) is rotatably mounted on the connecting seat (51); the head end of the support rod (55) is rotatably mounted on the T-shaped rod (52); the thrust spring (56) is extruded and mounted in the middle end of the T-shaped rod (52); the lifting frame (57) is extruded and mounted on the top end of the thrust spring (56); the lifting frame (57) is telescopically mounted on the T-shaped rod (52); and the triangular block (58) is fixedly mounted on the top end of the lifting frame (57).

5. A road surface cutting device for highway engineering construction according to claim 4, characterized in that: The connecting seat (51) is provided with a plurality of slots (59) corresponding to the triangular block (58), and a mesh cover (22) is provided in the front end inner cavity of the cylindrical cavity (23).

6. A road surface cutting device for highway engineering construction according to claim 1, characterized in that: The outer end of the outer cylinder (72) is connected to a cover plate (71), a plurality of fixed plates (74) are fixedly arranged inside the outer cylinder (72), the return spring (76) is connected to the fixed plate (74), an inclined wheel frame (75) and two rollers (77) are arranged between the fixed clamp rod (73) and the inclined surface of the transmission block (78), the two rollers (77) are rotatably mounted on the inclined wheel frame (75), the inclined wheel frame (75) and the head end of the fixed clamp rod (73) are fixedly connected, and the inclined surfaces of the rollers (77) and the transmission block (78) are in extrusion contact.

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