A road construction expansion joint cutting device

Abstract

This utility model belongs to the technical field of road cutting equipment, specifically relating to a road construction expansion joint cutting device, including a base, a moving mechanism, and a cutting assembly. The cutting assembly includes a cutting disc, a support member, and a driving member. Support cylinders coaxially connected to both sides of the cutting disc are rotatably mounted. The support member is rotatably mounted on the upper surface of the base, and an elastic telescopic member is hinged to the end of the support member away from the support cylinder. A telescopic rod is hinged to the end of the elastic telescopic member away from the support member and the base surface. Support blocks are fixed to the peripheral surfaces of each support cylinder within notches. A slider is slidably connected to the lower end of each support block. One end of the slider is rotatably connected to an auxiliary wheel near the cutting disc, and the other end is threadedly connected to a vertically placed adjusting rod, which passes vertically through the slider. This utility model effectively solves the problem that the cutting depth cannot be consistently maintained during the construction of road expansion joints, resulting in lower cutting efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of road cutting equipment, specifically relating to a road construction expansion joint cutting device. Background Technology

[0002] In road construction, cutting expansion joints is a crucial step in ensuring the structural integrity of concrete pavements under temperature changes, loads, and material shrinkage. The function of expansion joints is to release stress and prevent irregular cracks in the pavement caused by thermal expansion and contraction, thereby extending the road's service life. Currently, expansion joint cutting mainly relies on specialized cutting equipment. For example, a Chinese patent (patent publication number: CN221740868U) provides an expansion joint cutting device for road construction. This patent, through the use of limit blocks and pressure switches, ensures consistent cutting depth. Specifically, the height of the limit blocks is set according to the desired cutting depth. During the cutting process, if the cutting depth of a certain section does not meet the design standard, the slider and pressure switch do not contact, the pressure switch is in an open state, the traveling mechanism does not work, and the cutting equipment cannot move forward or backward. This forced measure reminds or urges construction personnel to work according to the standard requirements.

[0003] While the above technical solutions have solved the problem of insufficient road cutting depth to some extent, the forced walking mechanism does not work when the cutting depth is insufficient, and construction personnel need to continue to adjust the cutting depth. However, manual adjustment has slight errors and it is difficult to maintain a consistent cutting depth. When the cutting depth reaches the standard and the road is cut again, if the cutting depth does not reach the standard, the above steps need to be repeated. This undoubtedly increases the construction burden and reduces the efficiency of road cutting. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a road construction expansion joint cutting device to solve the problem that the cutting depth cannot be guaranteed to be consistent at all times during the current construction of road expansion joints, resulting in the need to improve cutting efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A road construction expansion joint cutting device includes a base, a moving mechanism for driving the base, and a cutting assembly disposed on the surface of the base. The cutting assembly includes a cutting disc, a support member for vertically supporting the cutting disc, and a driving member for driving the cutting disc to rotate. A notch for placing the cutting disc is opened on one side surface of the base, and the radial direction of the cutting disc is arranged along the axis of the base's length. Support cylinders coaxially arranged on both sides of the cutting disc are rotatably connected to it, and each support cylinder is fixedly connected to the support member. The support member is rotatably disposed on the upper surface of the base in a vertical plane, and an elastic telescopic member is hinged to the end of the support member away from the support cylinder. The end of the elastic telescopic member away from the support member is hinged to a telescopic rod together with the base surface. Support blocks disposed in the notch are fixed on the peripheral surface of each support cylinder. Each support block is vertically arranged, and a vertically moving slider is slidably connected to its lower end. Each slider is horizontally arranged, and an auxiliary wheel close to the cutting disc is rotatably connected to one end of the slider, and a vertically arranged adjusting rod is threaded to the other end. The adjusting rod passes vertically through the slider and is rotatably connected to the surface of the corresponding support block.

[0007] Furthermore, the support member includes two "L"-shaped connecting rods in the vertical plane, and the two connecting rods are symmetrically arranged about the axis of the base length direction. Each connecting rod is rotatably mounted on the upper surface of the base in the vertical plane, and one end of each connecting rod is fixed to the corresponding support cylinder, and the other end is hinged to the elastic telescopic member. The horizontal distance from the support cylinder to the hinge point of the corresponding connecting rod is less than the horizontal distance from the elastic telescopic member to the hinge point of the corresponding connecting rod.

[0008] Furthermore, the driving component includes a drive motor mounted on the upper surface of the base and a transmission device connected to the output end of the drive motor. A rotating shaft fixed to the cutting disc is coaxially rotatably connected inside any of the support cylinders, and the end of the rotating shaft away from the cutting disc is connected to the output end of the transmission device via a pulley and belt.

[0009] Furthermore, each of the support blocks has a protective shell fixed to its surface. Each of the protective shells is vertically positioned and covers the corresponding adjusting rod. The outer surface of each protective shell has a vertically positioned strip-shaped through hole, and the outer surface of each protective shell is engraved with a scale set along the length of the strip-shaped through hole.

[0010] Furthermore, the telescopic rod is inclined in the vertical plane and gradually tilts from top to bottom away from the cutting disc, and the drive motor and transmission device are located in the gap between the telescopic rod and the support member.

[0011] Furthermore, the outer surface of the cutting disc is provided with a dust cover coaxial with it, and the dust cover is fixed to the support cylinders on both sides of the cutting disc.

[0012] Furthermore, a push rod is fixed to the upper surface of the base.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention utilizes a coordinated design of elastic telescopic components, support components, auxiliary wheels, and lever structures to enable the cutting disc to automatically adjust its height according to road surface undulations, ensuring a constant cutting depth at expansion joints. The adjusting rod precisely controls the cutting depth, expanding its applicability. The labor-saving lever and hydraulic telescopic rod work together to stably lift the wheels and maintain equipment balance. Belt drive adapts to the lifting and lowering of the cutting disc, while the dust cover and push rod design balance safety and operability. The overall structure is compact and adaptable to complex road conditions, effectively improving construction efficiency.

[0015] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0017] Figure 1 This is a schematic diagram of the overall structure of the present utility model. Figure 1 ;

[0018] Figure 2 This is a side view of the present invention;

[0019] Figure 3 This is a schematic diagram of the overall structure of the present utility model. Figure 2 ;

[0020] Figure 4 This is a top view of the present invention;

[0021] Figure 5 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 6 This is a vertical sectional view of the protective shell of this utility model.

[0023] The following labels are shown in the attached diagram:

[0024] 1. Base, 2. Cutting assembly, 201. Cutting disc, 202. Support component, 2021. Connecting rod, 203. Support cylinder, 204. Elastic telescopic component, 205. Telescopic rod, 3. Support block, 4. Slider, 5. Auxiliary wheel, 6. Adjusting rod, 7. Drive motor, 8. Transmission device, 9. Protective housing, 10. Dust cover, 11. Push rod, 12. Rotating shaft. Detailed Implementation

[0025] like Figures 1-6 As shown,

[0026] A road construction expansion joint cutting device includes a base 1, a moving mechanism for driving the base 1, and a cutting assembly 2 disposed on the surface of the base 1. The moving mechanism includes four wheels disposed on the lower surface of the base 1, with two wheels disposed on the side away from the cutting disc 201. The cutting assembly 2 includes the cutting disc 201, a support member 202 for vertically supporting the cutting disc 201, and a driving member for rotating the cutting disc 201. A notch for placing the cutting disc 201 is formed on one side surface of the base 1. The notch is shaped like an isosceles triangle, and the axis of the notch coincides with the axis of the length direction of the base 1. The radial direction of the cutting disc 201 is arranged along the axis of the length direction of the base 1. Support cylinders 203 are rotatably connected to both sides of the cutting disc 201 and are coaxially arranged therewith. Each support cylinder 203 is fixedly connected to the support member 202. The support member 202 is rotatably disposed on the upper surface of the base 1 in a vertical plane, and the support member 202 is located away from the support. One end of the cylinder 203 is hinged to an elastic telescopic component 204 (the elastic telescopic component 204 consists of a spring and a telescopic sleeve, the specific structure and principle of which are existing technologies and will not be described in detail here). The end of the elastic telescopic component 204 away from the support component 202 is hinged to a telescopic rod 205 (the telescopic rod 205 is hydraulic) on the surface of the base 1. Each of the support cylinders 203 has a support block 3 welded and fixed to its peripheral surface, which is set in a notch. The support blocks 3 are all vertically set, and the lower end is slidably connected to a vertically moving slider 4. The sliders 4 are all horizontally set, and one end of the slider 4 is rotatably connected to an auxiliary wheel 5 near the cutting disc 201, and the other end is threadedly connected to a vertically placed adjusting rod 6. The axis of each auxiliary wheel 5 and the cutting disc 201 are in the same vertical plane. The adjusting rod 6 is set on the side of the support block 3 away from the auxiliary wheel 5. The adjusting rod 6 passes vertically through the slider 4 and is rotatably connected to the surface of the corresponding support block 3.

[0027] As shown in the diagram, when it is necessary to cut the road surface and create an expansion joint, the moving mechanism on the base 1 is used to transfer the device to the cutting starting position. The working end of the telescopic rod 205 is controlled to retract, indirectly causing the support 202 and cutting disc 201 to rotate, ensuring that the cutting disc 201 and auxiliary wheels 5 do not contact the ground. Then, each adjusting rod 6 is rotated, causing the slider 4 to move vertically via a thread, adjusting the axial distance between each auxiliary wheel 5 and the cutting disc 201. This indirectly adjusts the cutting depth of the expansion joint. After adjustment, it is necessary to ensure that the two auxiliary wheels... The axes of the five are on the same horizontal straight line. Then, the drive unit is activated, driving the cutting disc 201 to rotate. At the same time, the working end of the telescopic rod 205 is extended, and the cutting disc 201 and auxiliary wheels 5 are driven through the support member 202. The drive unit is activated, driving the cutting disc 201 to rotate towards the ground until the two auxiliary wheels 5 simultaneously touch the ground and lift the two wheels near the notch, so that the two lifted wheels are not in contact with the ground. At this time, the spring on the elastic telescopic member 204 is compressed. The base 1 contacts the ground and moves through the remaining two wheels and the two auxiliary wheels 5, while the cutting disc 201 rotates towards the ground. The cutting disc 201 has rotated and cut into the ground. The distance between the lower surface of each auxiliary wheel 5 and the lower surface of the cutting disc 201 is the depth of the expansion joint. Then, the base 1 is pushed to move, and the cutting disc 201 cuts the road and creates the expansion joint along the trajectory of the base 1. When encountering uneven road surfaces, since the lower surfaces of each auxiliary wheel 5 are in constant contact with the road surface, the raised road surface will push up each auxiliary wheel 5 and make it move upward (at this time, the support cylinder 203 will further compress the spring on the elastic expansion member 204 through the support member 202). The auxiliary wheels 5 will move through the support block 3 and the support cylinder. 203 drives the cutting disc 201 to move upwards synchronously to the same height. Similarly, when encountering road surface depressions, each auxiliary wheel 5 will move downwards synchronously with the cutting disc 201 for a certain distance (at this time, the spring on the elastic telescopic component 204 will stretch a certain distance), so that the cutting disc 201 can make expansion joints of constant depth according to the undulations of the road surface, effectively ensuring the accuracy of expansion joint production. Furthermore, the axis distance between each auxiliary wheel 5 and the cutting disc 201 can be adjusted by adjusting the adjusting rod 6, thereby indirectly adjusting the depth of expansion joint production, effectively improving the applicability of this equipment.

[0028] In this embodiment, the support member 202 includes two "L"-shaped connecting rods 2021 in the vertical plane, and the two connecting rods 2021 are symmetrically arranged about the axis of the length direction of the base 1. Each connecting rod 2021 is rotatably mounted on the upper surface of the base 1 in the vertical plane, and one end of each connecting rod 2021 is fixed to the corresponding support cylinder 203 by bolts, and the other end is hinged to the elastic telescopic member 204. The horizontal distance from the support cylinder 203 to the hinge point of the corresponding connecting rod 2021 is less than the horizontal distance from the elastic telescopic member 204 to the hinge point of the corresponding connecting rod 2021.

[0029] As shown in the figure, the horizontal distance from the pivot 12 of the support rod to the support cylinder 203 is less than the horizontal distance to the elastic telescopic member 204, forming a force-saving lever. This allows the telescopic rod 205 to effectively push the support member 202 through the elastic telescopic member 204, and drive each auxiliary wheel 5 to contact the ground. At the same time, it can also lift the two adjacent wheels off the ground, effectively ensuring the stability and service life of the equipment during movement.

[0030] In this embodiment, the driving component includes a drive motor 7 fixedly mounted on the upper surface of the base 1 by bolts and a transmission device 8 connected to the output end of the drive motor 7 (the transmission device 8 is used to amplify the torque of the drive motor 7, and its structure and principle are existing technologies, which will not be described in detail here). A rotating shaft 12 fixed to the cutting disc 201 is coaxially rotatably connected inside any of the support cylinders 203, and the end of the rotating shaft 12 away from the cutting disc 201 is connected to the output end of the transmission device 8 by a pulley belt.

[0031] As shown in the diagram, when creating expansion joints, it is necessary to control the rotation of the cutting disc 201 around the hinge of the support member 202. Therefore, the output end of the transmission device 8 and one end of the rotating shaft 12 are connected by a belt and pulleys for transmission. When the cutting disc 201 is cutting the ground to create expansion joints, the belt maintains optimal tension. When not cutting the ground, the telescopic rod 205, through the support member 202, lifts the cutting disc 201 away from the ground. At this time, due to the change in the center distance between the two pulleys, the belt is stretched. Through the elastic deformation of the belt, the stability of the equipment during operation can be effectively ensured. Of course, a tensioning pulley and corresponding structure can also be added to effectively maintain the optimal belt tension without requiring elastic deformation.

[0032] In this embodiment, each of the support blocks 3 has a protective housing 9 fixedly connected to its surface by bolts. Each of the protective housings 9 is vertical and covers the corresponding adjusting rod 6. One end of the adjusting rod 6 extends out of the protective housing 9. The outer surface of each protective housing 9 is provided with a vertically oriented strip-shaped through hole. The outer surface of each protective housing 9 is engraved with a scale set along the length direction of the strip-shaped through hole.

[0033] Combination Figure 5 As shown, the protective housing 9 can effectively prevent external debris or mud from affecting the connection between the adjusting rod 6 and the slider 4. The strip-shaped through hole and the scale on the protective housing 9 can facilitate the construction personnel to adjust the position of the slider 4, so that the axes of the two auxiliary wheels 5 can be kept on the same horizontal straight line.

[0034] In this embodiment, the telescopic rod 205 is inclined in the vertical plane and gradually tilts from top to bottom away from the cutting disc 201. The drive motor 7 and the transmission device 8 are located at the gap between the telescopic rod 205 and the support member 202. The structure is reasonably arranged and the normal operation of each component will not be affected.

[0035] In this embodiment, the outer surface of the cutting disc 201 is provided with a dust cover 10 coaxial with it. The dust cover 10 is fixed to the support cylinders 203 on both sides of the cutting disc 201 by bolts, which can effectively prevent gravel or dust from flying during the cutting process and affecting the safety of construction personnel.

[0036] In this embodiment, a push rod 11 is fixed to the upper surface of the base 1 by bolts, which makes it convenient for construction personnel to push the base 1.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A road construction expansion joint cutting device, comprising a base (1), a moving mechanism for driving the base (1) to move, and a cutting assembly (2) disposed on the surface of the base (1), characterized in that: The cutting assembly (2) includes a cutting disc (201), a support member (202) for vertically supporting the cutting disc (201), and a drive member for rotating the cutting disc (201). A notch for placing the cutting disc (201) is provided on one side surface of the base (1), and the radial direction of the cutting disc (201) is arranged along the axis of the length direction of the base (1). Support cylinders (203) are rotatably connected to both sides of the cutting disc (201) and are coaxially arranged with it. Each support cylinder (203) is fixedly connected to the support member (202). The support member (202) is rotatably arranged on the upper surface of the base (1) in a vertical plane, and the end of the support member (202) away from the support cylinder (203) is hinged. There is an elastic telescopic component (204), and the end of the elastic telescopic component (204) away from the support component (202) is hinged to the surface of the base (1) with a telescopic rod (205). Each of the support cylinders (203) has a support block (3) fixed in the notch on its peripheral surface. The support block (3) is vertically arranged and the lower end is slidably connected to a vertically moving slider (4). The slider (4) is horizontally arranged and one end of the slider (4) is rotatably connected to an auxiliary wheel (5) near the cutting disc (201). The other end is threadedly connected to a vertically placed adjusting rod (6). The adjusting rod (6) is vertically inserted through the slider (4) and rotatably connected to the surface of the corresponding support block (3).

2. The road construction expansion joint cutting equipment according to claim 1, characterized in that: The support member (202) includes two "L"-shaped connecting rods (2021) in the vertical plane, and the two connecting rods (2021) are symmetrically arranged about the axis of the base (1) in the length direction. Each connecting rod (2021) is rotatably arranged on the upper surface of the base (1) in the vertical plane, and one end of each connecting rod (2021) is fixed to the corresponding support cylinder (203), and the other end is hinged to the elastic telescopic member (204). The horizontal distance from the support cylinder (203) to the hinge point of the corresponding connecting rod (2021) is less than the horizontal distance from the elastic telescopic member (204) to the hinge point of the corresponding connecting rod (2021).

3. The road construction expansion joint cutting equipment according to claim 2, characterized in that: The driving component includes a drive motor (7) mounted on the upper surface of the base (1) and a transmission device (8) connected to the output end of the drive motor (7). A rotating shaft (12) fixed to the cutting disc (201) is coaxially rotatably connected inside any of the support cylinders (203), and the end of the rotating shaft (12) away from the cutting disc (201) is connected to the output end of the transmission device (8) by a pulley belt.

4. The road construction expansion joint cutting equipment according to claim 3, characterized in that: Each of the support blocks (3) has a protective shell (9) fixed on its surface. Each of the protective shells (9) is vertical and covers the corresponding adjusting rod (6). The outer surface of each protective shell (9) has a vertically oriented strip-shaped through hole. The outer surface of each protective shell (9) is engraved with a scale set along the length of the strip-shaped through hole.

5. The road construction expansion joint cutting equipment according to claim 4, characterized in that: The telescopic rod (205) is inclined in the vertical plane and gradually tilts from top to bottom away from the cutting disc (201). The drive motor (7) and transmission device (8) are located at the gap between the telescopic rod (205) and the support member (202).

6. The road construction expansion joint cutting equipment according to claim 1, characterized in that: The outer surface of the cutting disc (201) is provided with a dust cover (10) coaxial with it, and the dust cover (10) is fixed to the support cylinders (203) on both sides of the cutting disc (201).

7. The road construction expansion joint cutting equipment according to claim 1, characterized in that: A push rod (11) is fixed on the upper surface of the base (1).

Images