A cutting tooth cylinder drill with adjustable cutting tooth height

Abstract

The utility model belongs to geotechnical engineering equipment technical field discloses a cutting tooth cylinder drill of adjustable cutting tooth height, including drill rod, the bottom fixedly connected with the thread sleeve of drill rod, the screw rod is connected in the thread sleeve, be equipped with the nut of fixed connection with screw rod circumference on screw rod, the nut can drive screw rod to produce axial displacement in thread sleeve to realize the accurate regulation of drill bit installation height, the drill bit is detachably connected in screw rod end through the installation component, the installation component includes the connecting column and the clamping plate of integral connection with drill bit, both can be inserted in the internal cavity of screw rod, the inner wall of cavity is equipped with the clamping groove of cooperation with clamping plate to transmit the torque, the bolt is connected on screw rod lateral wall with screw, the end of this bolt can be radially close to the outer wall of connecting column to complete the lock. The utility model can conveniently adjust the drill bit height, has strengthened the working condition adaptability, and the drill bit installation is quick, the lock is reliable, the structure is compact, has effectively improved the construction efficiency and the flexibility of drilling tool.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering equipment technology, and in particular to a cutting tooth cylinder drill with adjustable cutting tooth height. Background Technology

[0002] Cutting tooth drills, widely used in pile foundation engineering and water conservancy construction, work on the principle of rotating the entire drill bit driven by a drilling rig, using the cutting teeth at the bottom to cut and break up the soil and rock, thus forming a pile hole. In existing technology, the drill bit of a cutting tooth drill is typically fixedly connected to the drill rod, for example, by welding or flange bolts. This structure is simple and can reliably transmit torque.

[0003] However, in actual drilling operations, the geological conditions encountered are often complex and varied. Within the depth range of the pile hole, there are various strata, including soft soil, clay, gravel layers, and even hard rock layers. Different strata have different requirements for the cutting angle and penetration depth (i.e., the protrusion height of the cutting teeth) of the cutting teeth in order to achieve the best breaking efficiency and the least equipment wear.

[0004] Because the connection between the drill bit and drill pipe is fixed in existing technologies, the extension height of the cutting teeth remains constant. This prevents the cutting tooth rebar drill from adapting to changes in the formation. For example, after the cutting teeth wear down, their effective cutting height decreases, leading to a significant drop in drilling efficiency; or when facing hard rock formations, a fixed, large extension height may cause torque overload and increased drill string vibration. This limits the application performance of cutting tooth rebar drills in complex formations and affects construction efficiency.

[0005] Therefore, this utility model proposes a cutting tooth cylinder drill with adjustable cutting tooth height to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a cutting tooth cylinder drill with adjustable cutting tooth height, which aims to improve the problem that the drill bit installation height of the existing cutting tooth cylinder drill is fixed and cannot be flexibly adjusted according to working conditions or wear, resulting in poor adaptability.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a cutting tooth cylinder drill with adjustable cutting tooth height, comprising: a drill rod, and a threaded sleeve fixedly connected to the bottom of the drill rod, and further comprising a screw, a nut, a drill bit and an installation assembly, wherein the screw is threadedly connected to the inner wall of the threaded sleeve, and the nut is circumferentially fixedly connected to the screw and rotatably abuts against the end face of the threaded sleeve. The mounting assembly includes a connecting post and a clamping plate that are integrally fixed to the top of the drill bit and extend upwards. The connecting post and clamping plate are slidably inserted into the internal cavity of the screw. The mounting assembly also includes bolts that are threaded to the side wall of the screw, and the ends of the bolts can be radially pressed against the outer wall of the connecting post to lock the drill bit.

[0008] Preferably, the outer wall of the drill rod is provided with a chip removal groove.

[0009] Preferably, the internal cavity of the screw has a slot that mates with the card plate.

[0010] Preferably, the shape of the card plate is adapted to the shape of the card slot.

[0011] Preferably, the outer wall of the nut is configured as a polygonal structure that can be used with external tools.

[0012] Preferably, the axis of the bolt is perpendicular to the axis of the screw.

[0013] Preferably, the end of the drill rod away from the threaded sleeve is fixedly connected to a connector for connecting to the drilling rig.

[0014] Preferably, the connection between the threaded sleeve and the bottom of the drill rod is welding.

[0015] This utility model has the following beneficial effects: 1. This utility model solves the problem in the prior art that the drill bit installation height of the cutting tooth cylinder drill is fixed and cannot be flexibly adjusted according to working conditions or wear by setting an adjustment component consisting of a threaded sleeve, a screw, and a nut. The nut drives the screw to rotate inside the threaded sleeve to adjust the extension length of the drill bit. This achieves the technical effect of being able to conveniently and accurately adjust the working height of the drill bit, enhancing the adaptability of the drilling tool to different working conditions, and extending the service life of the drill bit.

[0016] 2. This utility model solves the problems of complex drill bit installation, low connection reliability, and easy loosening or relative rotation under high torque in the prior art by setting an installation assembly consisting of a connecting column, a clamping plate, and bolts. It adopts the method of circumferential limiting by the clamping plate and the internal groove of the screw for circumferential limiting, and the method of axial locking by the bolts radially pressing against the connecting column. It achieves the technical effect of quick drill bit installation, accurate positioning, reliable locking, and stable torque transmission. Attached Figure Description

[0017] Figure 1 This is a perspective view of a cutting tooth cylinder drill with adjustable cutting tooth height proposed in this utility model; Figure 2 This is a schematic diagram of the drill rod outer wall structure of an adjustable-height cutting tooth cylinder drill according to the present invention. Figure 3 This is a schematic diagram of the drill rod outer wall structure of an adjustable-height cutting tooth cylinder drill according to the present invention. Figure 4 This is a schematic diagram of the outer wall structure of the adjusting component of an adjustable cutting tooth cylinder drill according to the present invention; Figure 5 This is an exploded structural diagram of the mounting assembly of an adjustable cutting tooth cylinder drill according to the present invention.

[0018] Legend: 1. Connector; 2. Drill rod; 3. Chip removal groove; 4. Adjustment assembly; 401. Threaded sleeve; 402. Screw; 403. Nut; 404. Drill bit; 5. Mounting assembly; 501. Connecting post; 502. Clamping plate; 503. Bolt. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Reference Figures 1-5 This utility model provides an embodiment of an adjustable cutting tooth cylinder drill, comprising a drill rod 2, with a connecting piece 1 for connecting to a drilling rig fixedly connected to the end of the drill rod 2 away from the threaded sleeve 401. A chip removal groove 3 is formed on the outer wall of the drill rod 2, and the threaded sleeve 401 is fixedly connected to the bottom of the drill rod 2 by welding. An adjustment component 4 and an installation component 5 work together to adjust and install the drill bit 404. The adjustment component 4 includes the threaded sleeve 401, a screw 402, a nut 403, and the drill bit 404. The screw 402 is threadedly connected to the inner wall of the threaded sleeve 401, and the nut 403 is circumferentially fixedly connected to the screw 402 and rotatably abuts against the threaded sleeve. The end face of sleeve 401 and the outer wall of nut 403 are configured as a polygonal structure that can be used with external tools. Drill bit 404 is detachably connected to the end of screw 402 via mounting assembly 5. Mounting assembly 5 includes a connecting post 501 and a clamping plate 502 that are integrally fixed to the top of drill bit 404 and extend upward. The connecting post 501 and clamping plate 502 are slidably inserted into the internal cavity of screw 402. Mounting assembly 5 also includes bolt 503, which is threaded to the side wall of screw 402. The axis of bolt 503 is perpendicular to the axis of screw 402. The end of bolt 503 can be radially pressed against the outer wall of connecting post 501 to lock drill bit 404. The screw 402 is rotatably connected to the inner thread of the threaded sleeve 401 via its outer thread. The nut 403 is circumferentially fixed to the screw 402, so that rotating the nut 403 synchronously drives the screw 402 to rotate. At the same time, the nut 403 rotatably abuts against the end face of the threaded sleeve 401. This structure converts the rotation of the nut 403 into the axial linear motion of the screw 402 relative to the threaded sleeve 401, thereby adjusting the extension length of the screw 402. The screw 402 has an internal cavity for accommodating the mounting assembly 5, and a slot is formed on the inner wall of the internal cavity. This slot is used to cooperate with the retaining plate 502 of the mounting assembly 5. The connecting post 501 and the retaining plate 502 of the mounting assembly 5 are connected. The screw rod 402 is integrally fixed to the top of the drill bit 404. During installation, the connecting post 501 and the retaining plate 502 are inserted together into the internal cavity of the screw rod 402. The shape of the retaining plate 502 is adapted to the shape of the retaining groove. After the two slide together, it ensures that the torque of the screw rod 402 can be transmitted to the drill bit 404 and prevents the drill bit 404 from rotating relative to the screw rod 402. In order to axially lock the drill bit 404, a threaded hole is provided on the side wall of the screw rod 402. The bolt 503 is threaded into the threaded hole. When the bolt 503 is tightened, its end is radially pressed against the outer wall of the connecting post 501 inserted into the internal cavity. The friction generated securely locks the drill bit 404 onto the screw rod 402. To facilitate the removal of rock and soil debris during drilling, a chip removal groove 3 is provided on the outer wall of the drill rod 2 along its axial direction. To achieve reliable torque transmission, a slot is provided on the inner wall of the internal cavity of the screw 402, and the chuck 502 has a shape adapted to the slot. When the chuck 502 slides into the slot, the two form a circumferential limit, thereby preventing the drill bit 404 from rotating relative to the screw 402. To facilitate the rotation of the nut 403 using external tools, the outer circumferential surface of the nut 403 is set as a polygonal structure that can cooperate with external tools. To apply effective radial locking force, the axis of the bolt 503 is perpendicular to the axis of the screw 402. To connect the entire device to the drilling rig power source, a connector 1 is fixedly connected to the end of the drill rod 2 away from the threaded sleeve 401. To ensure the strength and integrity of the connection, the threaded sleeve 401 is fixedly connected to the bottom of the drill rod 2 by welding.

[0021] Working principle: When it is necessary to adjust the drilling height of drill bit 404, use an external tool to clamp and rotate nut 403. Since nut 403 is circumferentially fixed to screw 402, the rotation of nut 403 will synchronously drive screw 402 to rotate on the inner wall of threaded sleeve 401. Since nut 403 can rotatably abut against the end face of threaded sleeve 401 while its axial position remains unchanged, screw 402 will produce an axial linear motion of extension or retraction relative to threaded sleeve 401 under the action of thread transmission, thereby driving drill bit 404 fixed at its end to move to the predetermined height. When installing or replacing drill bit 404, first loosen bolt 503, align the connecting post 501 and clasp 502 at the top of drill bit 404 and slide them into the internal cavity of screw 402 until clasp 502 is fully inserted into the groove on the inner wall of the internal cavity. At this time, drill bit 404 and screw 402 are circumferentially fixed. Then tighten bolt 503, and its end will radially abut against the outer wall of connecting post 501, using friction to reliably lock drill bit 404 axially. During drilling, the power of the drilling rig is transmitted to drill rod 2 through connector 1, driving the entire drill bit to rotate. Torque is transmitted to drill bit 404 through screw 402 and the cooperation of clasp 502 and clasp groove to realize cutting operation. The generated chips are discharged through chip removal groove 3 on the outer wall of drill rod 2.

Claims

1. A cutting tooth barrel drill with adjustable cutting tooth height, comprising: The drill rod (2), the bottom of which is fixedly connected to the threaded sleeve (401) of the adjusting assembly (4), is characterized in that: The adjusting assembly (4) further includes a screw (402), a nut (403), and a drill bit (404). The screw (402) is threaded to the inner wall of the threaded sleeve (401). The nut (403) is fixed to the outer periphery of the screw (402) and abuts against the end face of the threaded sleeve (401) to drive the screw (402) to rotate within the threaded sleeve (401) to adjust its axial position. The drill bit (404) is detachably connected to the end of the screw (402) via the mounting assembly (5). The mounting assembly (5) includes a connecting post (501) and a bolt (503), the connecting post (501) extending from the top of the drill bit (404) and being pluggably received inside the screw (402), the bolt (503) being threaded to the side wall of the screw (402), and the end of the bolt (503) being radially abutted against the outer wall of the connecting post (501).

2. The adjustable cutting tooth height cutting tooth cylinder drill according to claim 1, characterized in that: The outer wall of the drill rod (2) is provided with a chip removal groove (3).

3. The adjustable cutting tooth height cutting tooth cylinder drill according to claim 1, characterized in that: The installation component (5) also includes a clamping plate (502), which is integrally formed with the connecting column (501).

4. A cutting tooth cylinder drill with adjustable cutting tooth height according to claim 3, characterized in that: The screw (402) has a groove inside for limiting the clamping plate (502) to prevent the drill bit (404) from rotating relative to the screw (402).

5. A cutting tooth cylinder drill with adjustable cutting tooth height according to claim 1, characterized in that: The outer wall of the nut (403) is configured as a polygonal structure that can be used with external tools.

6. A cutting tooth cylinder drill with adjustable cutting tooth height according to claim 1, characterized in that: The axis of the bolt (503) is perpendicular to the axis of the screw (402).

7. A cutting tooth cylinder drill with adjustable cutting tooth height according to claim 1, characterized in that: The drill rod (2) is fixedly connected to a connector (1) for connecting to the drilling rig at the end away from the adjustment assembly (4).

8. A cutting tooth cylinder drill with adjustable cutting tooth height according to claim 1, characterized in that: The threaded sleeve (401) is fixedly connected to the bottom of the drill rod (2) by welding.

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