A shallow layer punching device for road construction

Abstract

The utility model discloses a shallow layer punching device for road surface construction, including road surface punch main part, the one side of road surface punch main part outer surface installs cylindrical metal shell, the middle position of cylindrical metal shell lower end surface is equipped with first circular groove. When the circular road surface base stone being taken out from the road surface is clamped to the drill bit inside that is composed of four arc punching drill bits, the interval between the four arc punching drill bits can be enlarged through the stepping motor, when the interval between the four arc punching drill bits becomes larger, the circular road surface base stone clamped between the four arc punching drill bits will directly fall under the action of gravity, through the above technical scheme, the circular road surface base stone clamped in the drill bit inside can be taken out without exerting the pushing force on the circular road surface base stone, thereby can prevent the inner wall of the drill bit from being damaged by the circular road surface base stone.

Description

Technical Field

[0001] This utility model relates to the field of road construction technology, specifically to a shallow drilling device for road construction. Background Technology

[0002] Road surface generally refers to the ground portion used for traffic, including roads, squares, parking lots, airport runways, etc. It is not only an important part of transportation infrastructure, but also the foundation for the normal operation of cities and transportation systems;

[0003] Shallow drilling equipment for road construction is a device specifically designed for shallow drilling on road surfaces, primarily used for installing embedded components, inspecting road quality, or performing other construction operations.

[0004] However, some existing shallow drilling devices for road construction use a corresponding pushing unit to apply a pushing force to the circular roadbed stones stuck inside the tubular drill bit in order to facilitate the removal of the stones. However, when the stones inside the drill bit are subjected to this pushing force, there may be relatively severe friction between them and the inner wall of the drill bit, which may damage the inner wall of the drill bit and affect its service life. Therefore, this does not meet the existing requirements. To address this, we propose a shallow drilling device for road construction. Utility Model Content

[0005] The purpose of this utility model is to provide a shallow drilling device for road construction, in order to facilitate the removal of circular roadbed stones stuck inside the tubular drill bit, some existing shallow drilling devices for road construction apply a pushing force to the stones stuck inside the drill bit through a corresponding pushing unit. However, when the stones inside the drill bit are subjected to the pushing force, there may be relatively severe friction between the stones and the inner wall of the drill bit, which may damage the inner wall of the drill bit and affect its service life.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a shallow drilling device for road construction, comprising a road drilling machine body, a cylindrical metal shell installed on one side of the outer surface of the road drilling machine body, a first circular groove provided in the middle of the lower end face of the cylindrical metal shell, a stepper motor fixed inside the cylindrical metal shell above the first circular groove, the output shaft of the stepper motor connected to a threaded lifting rod via a coupling, a circular fixing plate connected to the threaded lifting rod via a threaded structure on the outer side of the threaded lifting rod, a second circular groove provided in the middle of the lower end face of the circular fixing plate, an arc-shaped drilling bit provided at each of the four corners inside the second circular groove, the outer side of the upper end face of the arc-shaped drilling bit being inclined, the opposing surfaces of the four arc-shaped drilling bits fitting together, and the four fitting arc-shaped drilling bits forming a tubular shape.

[0007] The arc-shaped drilling bit has a cylindrical groove on one side inside. The cylindrical groove contains a spring. A metal ring is connected to the surface of the spring facing the inner wall of the first circular groove. A metal rod is connected to the axis of the metal ring, and the surface of the metal rod facing the inner wall of the first circular groove is fixed to the inner wall of the first circular groove.

[0008] Preferably, the outer surfaces of the top ends of the four interlocking arc-shaped drilling bits are all in contact with the inner wall of the second circular groove, and the cross-section of the bottom end of the arc-shaped drilling bits is a right-angled triangle.

[0009] Preferably, an anti-detachment groove is provided at the middle position of the upper inner wall of the second circular groove, and an anti-detachment plate fixed to the lower end face of the threaded lifting rod is provided inside the anti-detachment groove.

[0010] Preferably, a guide rod is provided at each of the four corners of the outer side of the circular fixing plate, and a guide sleeve is movably sleeved on the lower side of the outer surface of the guide rod, and the surface of the guide sleeve facing the circular fixing plate is fixed to the circular fixing plate.

[0011] Preferably, the outer surface of the metal ring is in contact with the inner wall of the cylindrical groove, and the metal ring and the cylindrical groove are slidably connected.

[0012] Preferably, the cylindrical metal shell has an internal thread mounting groove at the middle of its upper surface, and an external thread mounting head matching its internal thread is provided inside the internal thread mounting groove, and the upper surface of the external thread mounting head is fixed to the main body of the road drilling machine.

[0013] Preferably, a protective cover plate is provided above the stepper motor on the upper end face of the cylindrical metal shell, and the cylindrical metal shell and the protective cover plate are fixed together by screws.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention allows for the removal of a circular pavement stone from the road surface. When the stone is wedged inside a drill bit consisting of four arc-shaped drilling bits, a stepper motor synchronously moves the four arc-shaped drilling bits outwards, thereby increasing the distance between them. As the distance between the four arc-shaped drilling bits increases, the circular pavement stone wedged between them will fall off directly under the influence of gravity. This technical solution removes the circular pavement stone from the drill bit without applying a pushing force, thus preventing damage to the inner wall of the drill bit and increasing its service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a front view of the entire utility model;

[0018] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0019] Figure 4 This utility model Figure 3 Enlarged view of the structure at point B.

[0020] In the diagram: 1. Main body of the road drilling machine; 2. Cylindrical metal shell; 3. First circular groove; 4. Arc-shaped drilling bit; 5. Stepper motor; 6. Threaded lifting rod; 7. Circular fixing plate; 8. Second circular groove; 9. Inclined surface; 10. Cylindrical groove; 11. Metal rod; 12. Metal ring; 13. Spring; 14. Guide rod; 15. Guide sleeve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] The road drilling machine body 1 (model HZ-20), stepper motor 5 (model DM542), and threaded lifting rod 6 (model M16) mentioned in this utility model can be obtained from the market or through private customization.

[0023] Please see Figures 1 to 4An embodiment of this utility model provides a shallow drilling device for road construction, comprising a road drilling machine body 1, a cylindrical metal shell 2 installed on one side of the outer surface of the road drilling machine body 1, a first circular groove 3 provided in the middle of the lower end face of the cylindrical metal shell 2, a stepper motor 5 fixed inside the cylindrical metal shell 2 above the first circular groove 3, the output shaft of the stepper motor 5 connected to a threaded lifting rod 6 through a coupling, a circular fixing plate 7 connected to the threaded lifting rod 6 by a threaded structure on the outer side of the threaded lifting rod 6, a second circular groove 8 provided in the middle of the lower end face of the circular fixing plate 7, an arc-shaped drilling bit 4 provided at each of the four corners inside the second circular groove 8, the outer side of the upper end face of the arc-shaped drilling bit 4 being an inclined surface 9, the opposing surfaces of the four arc-shaped drilling bits 4 being in contact with each other, and the four arc-shaped drilling bits 4 being in contact with each other forming a tubular shape.

[0024] The inside of the arc-shaped drilling bit 4 is provided with a cylindrical groove 10 on one side. The cylindrical groove 10 contains a spring 13. A metal ring 12 is connected to the surface of the spring 13 facing the inner wall of the first circular groove 3. A metal rod 11 is connected to the axis of the metal ring 12, and the surface of the metal rod 11 facing the inner wall of the first circular groove 3 is fixed to the inner wall of the first circular groove 3.

[0025] The upper end face of the cylindrical metal shell 2 is provided with an internal thread mounting groove in the middle position. The internal thread mounting groove is provided with an external thread mounting head that matches its internal thread. The upper end face of the external thread mounting head is fixed to the road drilling machine body 1. A drill bit can be formed by four interlocking and tubular arc-shaped drilling drill bits 4.

[0026] Before using the equipment, the cylindrical metal shell 2 is installed on the road drilling machine body 1 through the internal thread mounting groove and the external thread mounting head. When it is necessary to perform drilling operations on the road surface through the road drilling machine body 1, the four mutually closed arc-shaped drilling bits 4 are driven to rotate by the road drilling machine body 1 and move the arc-shaped drilling bits 4 downward.

[0027] The outer surfaces of the top ends of the four interlocking arc-shaped drilling bits 4 are all in contact with the inner wall of the second circular groove 8, and the cross-section of the bottom end of the arc-shaped drilling bit 4 is a right triangle. As the arc-shaped drilling bit 4 descends, the bottom end of the arc-shaped drilling bit 4 with its right triangle cross-section will contact the road surface and gradually drill into the interior of the road surface. As the arc-shaped drilling bit 4 goes deeper, the road surface between the four arc-shaped drilling bits 4 will be separated from the overall road surface.

[0028] When the lower end face of the arc-shaped drilling bit 4 moves to the corresponding depth, the arc-shaped drilling bit 4 is lifted and the segmented road surface is removed from the road surface as a whole to form a hole, and then work can be carried out in this hole.

[0029] If the road surface divided by the four arc-shaped drilling bits 4 is stuck between the four arc-shaped drilling bits 4 and moves upward along with them as the four arc-shaped drilling bits 4 rise, then the stepper motor 5 is started, driving the threaded lifting rod 6 connected to it to rotate.

[0030] A guide rod 14 is provided at each of the four corners of the outer side of the circular fixed plate 7. A guide sleeve 15 is movably sleeved on the lower side of the outer surface of the guide rod 14, and the surface of the guide sleeve 15 facing the circular fixed plate 7 is fixed to the circular fixed plate 7. Since the circular fixed plate 7, which is connected to the threaded lifting rod 6 through a threaded structure, is fixed to the guide sleeve 15, the circular fixed plate 7 itself cannot rotate.

[0031] When the threaded lifting rod 6 rotates, the circular fixing plate 7, which is threadedly connected to it but cannot rotate on its own, will move up and down under the drive of the threaded structure. At this time, the circular fixing plate 7 moves upward. As the circular fixing plate 7 rises, the top end of the arc-shaped drilling bit 4 will gradually leave the inside of the second circular groove 8 located on the lower end face of the circular fixing plate 7. During the process of the top end of the arc-shaped drilling bit 4 leaving the inside of the second circular groove 8, the four springs 13 located inside the four arc-shaped drilling bits 4 can gradually push the four arc-shaped drilling bits 4 outward synchronously through the spring force of the four springs 13 located inside the four arc-shaped drilling bits 4 respectively. As the four arc-shaped drilling bits 4 move, the gap between the four arc-shaped drilling bits 4 will gradually increase. When the gap between the four arc-shaped drilling bits 4 increases, the roadbed stone stuck between the four arc-shaped drilling bits 4 will fall directly under the action of gravity. Through the above technical solution, the circular roadbed stone stuck inside the drill bit can be removed without applying a pushing force to the circular roadbed stone, thereby preventing the inner wall of the drill bit from being damaged by the circular roadbed stone and increasing its service life.

[0032] When drilling is required again, the stepper motor 5 drives the connected threaded lifting rod 6 to rotate in the opposite direction, thereby moving the circular fixed plate 7 downward. As the circular fixed plate 7 descends, the entrance of the second circular groove 8 located on the lower end face of the circular fixed plate 7 will contact the inclined surface 9 located on the upper end face of the arc-shaped drilling bit 4, pushing the arc-shaped drilling bit 4 inward. After the inclined surface 9 passes the entrance of the second circular groove 8, the four arc-shaped drilling bits 4 will fit together to form a drill bit. Then, drilling can continue to be performed using the drill bit composed of the four arc-shaped drilling bits 4.

[0033] The second circular groove 8 has an anti-detachment groove in the middle of the upper inner wall, and the anti-detachment groove has an anti-detachment plate fixed to the lower end face of the threaded lifting rod 6 inside; the anti-detachment groove and the anti-detachment plate can prevent the circular fixing plate 7 from falling completely off the threaded lifting rod 6.

[0034] The outer surface of the metal ring 12 is in contact with the inner wall of the cylindrical groove 10, and the metal ring 12 and the cylindrical groove 10 are slidably connected. The metal ring 12, which is in contact with the inner wall of the cylindrical groove 10, can ensure that the four arc-shaped drilling bits 4 are always at the same height. This structure can prevent the lower end faces of the four arc-shaped drilling bits 4 from being out of parallel, which would result in unevenness of the lower end faces of the drill bits that are in contact with each other.

[0035] A protective cover plate is provided above the stepper motor 5 on the upper end face of the cylindrical metal shell 2, and the cylindrical metal shell 2 and the protective cover plate are fixed together by screws; the protective cover plate can protect the internal structure of the cylindrical metal shell 2, and when the internal structure of the cylindrical metal shell 2 fails, the protective cover plate can be removed to repair the internal structure of the cylindrical metal shell 2.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A shallow drilling device for road construction, comprising a road drilling machine body (1), characterized in that: A cylindrical metal shell (2) is installed on one side of the outer surface of the main body (1) of the road drilling machine. A first circular groove (3) is provided in the middle of the lower end face of the cylindrical metal shell (2). A stepper motor (5) is fixed inside the cylindrical metal shell (2) above the first circular groove (3). The output shaft of the stepper motor (5) is connected to a threaded lifting rod (6) through a coupling. A circular fixing plate (7) is provided on the outside of the threaded lifting rod (6) and connected to it through a threaded structure. A second circular groove (8) is provided in the middle of the lower end face of the circular fixing plate (7). An arc-shaped drilling bit (4) is provided at each of the four corners inside the second circular groove (8). The outer side of the upper end face of the arc-shaped drilling bit (4) is an inclined surface (9). The opposite surfaces of the four arc-shaped drilling bits (4) are in contact with each other, and the four arc-shaped drilling bits (4) that are in contact with each other are in a tubular shape. The arc-shaped drilling bit (4) has a cylindrical groove (10) on one side inside. The cylindrical groove (10) contains a spring (13). A metal ring (12) is connected to the surface of the spring (13) facing the inner wall of the first circular groove (3). A metal rod (11) is connected to the axis of the metal ring (12), and the surface of the metal rod (11) facing the inner wall of the first circular groove (3) is fixed to the inner wall of the first circular groove (3).

2. The shallow drilling device for road construction according to claim 1, characterized in that: The outer surfaces of the top ends of the four interlocking arc-shaped drilling bits (4) are all in contact with the inner wall of the second circular groove (8), and the cross section of the bottom end of the arc-shaped drilling bits (4) is a right triangle.

3. The shallow drilling device for road construction according to claim 1, characterized in that: The second circular groove (8) has an anti-detachment groove in the middle of the upper inner wall, and the anti-detachment groove has an anti-detachment plate fixed to the lower end face of the threaded lifting rod (6). The outer surface of the metal ring (12) is in contact with the inner wall of the cylindrical groove (10), and the metal ring (12) and the cylindrical groove (10) are slidably connected.

4. A shallow drilling device for road construction according to claim 1, characterized in that: A guide rod (14) is provided at each of the four corners of the outer side of the circular fixing plate (7). A guide sleeve (15) is movably sleeved on the lower side of the outer surface of the guide rod (14), and the surface of the guide sleeve (15) facing the circular fixing plate (7) is fixed to the circular fixing plate (7).

5. A shallow drilling device for road construction according to claim 1, characterized in that: The cylindrical metal shell (2) has an internal thread mounting groove at the middle position of the upper end face. The internal thread mounting groove is provided with an external thread mounting head that matches its internal thread. The upper end face of the external thread mounting head is fixed to the road drilling machine body (1).

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