Adjustable reamer bit

Abstract

The utility model discloses an adjustable reamer bit, and relates to the technical field of drilling bits. The device comprises a sliding sleeve, a connecting column is slidably connected into the sliding sleeve, and one end of the connecting column penetrates through the bottom of the sliding sleeve and is fixedly connected with a drill bit. A disc is fixedly connected in the sliding sleeve and located above the connecting column, a gear is rotationally connected to the top of the disc through a rotating shaft, two sets of positioning plates are arranged on the circumferential side face of the sliding sleeve in a sliding and penetrating mode and distributed in a high-low staggered mode, and any set of positioning plates are symmetrically arranged relative to the gear. Tooth grooves meshed with the gear are evenly formed in the side, facing the gear, of the positioning plate. The drill bit is driven by the sliding connecting column to move downwards, and the inclination angles of the arc-shaped blades are adjusted and fixed at the same time under the cooperation of the arc-shaped blades, the connecting plate, the positioning plate, the gear and the limiting assembly, so that the reaming diameter is conveniently adjusted and fixed, and the drilling stability is improved.

Description

Technical Field

[0001] This utility model belongs to the field of drilling bit technology, and in particular relates to an adjustable reaming bit. Background Technology

[0002] Drilling is an engineering process that uses mechanical equipment to drill cylindrical holes of a certain depth into the ground. During drilling, a drill bit is inserted into the ground to be drilled, and an external drive unit rotates the drill bit to create a hole. When a larger drill bit cannot be used, a smaller drill bit is first used for positioning, and then a reaming drill bit is inserted into the previously drilled hole to expand its inner diameter. A search reveals that Chinese patent application CN202020513210.1 discloses an automatically adjusting reaming drill bit, including a housing, a connecting rod, a drill bit, a reaming arm, and an elastic buffer assembly. The connecting rod is located inside the housing, the drill bit is slidably mounted inside the housing, and the reaming arm is hinged between the housing and the drill bit to enlarge the diameter of the hole drilled. The elastic buffer assembly is located inside the housing on the connecting rod to buffer the sliding speed of the drill bit. This technical solution solves the problem of shortened service life of existing reaming drill bits due to excessive impact. However, this utility model still has some drawbacks: When in use, the drilling diameter of the drill bit is adjusted by adjusting the two expansion walls set on the outer shell. However, since the drill bit will slide inside the outer shell, there is no corresponding limit, which makes it impossible to fix the tilt angle of the two expansion walls. This makes it impossible to fix the diameter of the expansion hole when drilling, and it is not convenient to adjust and fix the diameter of the expansion hole according to the actual use needs. Moreover, the expansion walls have poor stability when in use. Utility Model Content

[0003] The purpose of this utility model is to provide an adjustable reaming drill bit. The drill bit moves downward through a sliding connecting column, and with the cooperation of the arc-shaped blades, connecting plate, positioning plate, gear and limiting components, the tilt angle of each arc-shaped blade is adjusted and fixed at the same time. This solves the problems of existing drill bits that are inconvenient to adjust and fix the reaming diameter according to actual use needs, and the poor stability of the reaming wall during use.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model relates to an adjustable reaming drill bit, comprising a sliding sleeve, a connecting post slidably connected inside the sliding sleeve, one end of the connecting post passing through the bottom of the sliding sleeve and fixedly connected to the drill bit; a disc fixedly connected inside the sliding sleeve and above the connecting post, the top of the disc being rotatably connected to a gear via a rotating shaft; two sets of positioning plates slidably passing through the periphery of the sliding sleeve, the two positioning plates being staggered in height, each set of positioning plates being symmetrically arranged about the gear; the positioning plates having evenly spaced toothed grooves on the gear-facing side; a limiting component engaging with the gear being provided inside the sliding sleeve; a connecting plate fixedly connected to the opposite ends of two adjacent positioning plates, an arc-shaped cutter wing hinged to the bottom of the connecting plate, the other end of the arc-shaped cutter wing being hinged to the periphery of the drill bit; a reinforcing slide rod fixedly connected to one side of the connecting plate, the other end of the reinforcing slide rod passing through the adjacent positioning plate and slidably engaged.

[0006] As a preferred embodiment of this utility model, the sliding sleeve has a through hole on its peripheral side that slides with the positioning plate.

[0007] As a preferred technical solution of this utility model, the top circumferential side of the connecting column is fixedly connected with a limiting block in a circular array, and the sliding sleeve has a limiting groove that slides with the limiting block.

[0008] As a preferred embodiment of this utility model, a blade head is fixedly connected to the outer side of the arc-shaped blade wing.

[0009] As a preferred technical solution of this utility model, the limiting component includes an arc-shaped toothed plate, which is slidably connected to the top of the disk. The arc-shaped toothed plate meshes with a gear, and a screw is rotatably connected to the outer side of the arc-shaped toothed plate. One end of the screw passes through to the outer side of the sliding sleeve and is threadedly connected to it.

[0010] As a preferred embodiment of this utility model, the top of the sliding sleeve is fixedly connected to a mounting base.

[0011] This utility model has the following beneficial effects:

[0012] 1. This utility model uses a sliding connecting column to drive the drill bit downward, and with the cooperation of the arc-shaped blade, connecting plate, positioning plate, gear and limiting component, the tilt angle of each arc-shaped blade is adjusted and fixed at the same time, so as to facilitate the adjustment and fixation of the enlarged hole diameter according to the actual use needs. Moreover, the enlarged hole wall improves the stability of the arc-shaped blade and connecting plate during use.

[0013] 2. This utility model reduces the resistance encountered by the arc-shaped cutter wings during drilling by setting arc-shaped cutter wings, and facilitates drilling operations on the drill bit after hole enlargement with the cooperation of the cutter head.

[0014] 3. By setting up a reinforced sliding rod and cooperating with the positioning plate, this utility model improves the stability of the connecting plate and the arc-shaped blade when the drill bit is drilling after hole enlargement, which facilitates practical use.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an adjustable reaming drill bit according to the present invention.

[0018] Figure 2 for Figure 1 A structural diagram from another perspective.

[0019] Figure 3 for Figure 1 A schematic diagram of the internal structure of the sliding sleeve.

[0020] Figure 4 This is a structural diagram of the combination of connecting column, drill bit and limiting block.

[0021] Figure 5 This is a schematic diagram of the sliding sleeve.

[0022] Figure 6 for Figure 5 A structural diagram from another perspective.

[0023] Figure 7 This is a partial cross-sectional view of the sliding sleeve.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1-Sliding sleeve, 101-Through hole, 102-Limiting groove, 2-Connecting column, 3-Drill bit, 4-Disc, 5-Rotating shaft, 6-Gear, 7-Positioning plate, 701-Gear groove, 8-Limiting assembly, 801-Arc-shaped toothed plate, 802-Screw, 9-Connecting plate, 10-Arc-shaped cutter wing, 11-Reinforced slide bar, 12-Limiting block, 13-Cut head, 14-Mounting base. Detailed Implementation

[0026] 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 scope of protection of the present utility model. Specific implementation examples:

[0028] Please see Figure 1-7 As shown, this utility model is an adjustable reaming drill bit, including a sliding sleeve 1. A connecting post 2 is slidably connected inside the sliding sleeve 1. One end of the connecting post 2 passes through the bottom of the sliding sleeve 1 and is fixedly connected to a drill bit 3. A disc 4 is fixedly connected inside the sliding sleeve 1 and above the connecting post 2. A gear 6 is rotatably connected to the top of the disc 4 via a rotating shaft 5. Two sets of positioning plates 7 are slidably arranged through the circumference of the sliding sleeve 1, and the two positioning plates 7 are staggered in height. Through holes 101 are opened on the circumference of the sliding sleeve 1 to slide with the positioning plates 7. Each set of positioning plates 7 is symmetrically arranged about the gear 6. The plate 7 has evenly spaced tooth grooves 701 that mesh with the gear 6 on the side facing the gear 6. The sliding sleeve 1 is provided with a limiting component 8 that meshes with the gear 6, which is used to adjust and limit the rotation of the gear 6. A connecting plate 9 is fixedly connected to one of the opposite ends of two adjacent positioning plates 7. The two opposite outer sides of the connecting plate 9 are designed with arc surface structure to reduce the resistance of the connecting plate 9 and facilitate drilling. An arc-shaped cutter wing 10 is hinged to the bottom of the connecting plate 9. The other end of the arc-shaped cutter wing 10 is hinged to the side of the drill bit 3. A reinforcing slide rod 11 is fixedly connected to one side of the connecting plate 9. The other end of the reinforcing slide rod 11 passes through the adjacent positioning plate 7 and slides in fit.

[0029] Among them, the top circumferential side of the connecting column 2 is fixedly connected to the limiting block 12 in a circular array, and the sliding sleeve 1 has a limiting groove 102 that slides with the limiting block 12 to prevent the connecting column 2 from rotating in the sliding sleeve 1 and limit it, thereby maintaining the stability of the drill bit 3 during drilling.

[0030] The outer side of the arc-shaped blade 10 is fixedly connected to the blade head 13, which facilitates drilling operations after the arc-shaped blade 10 enlarges the hole.

[0031] The limiting component 8 includes an arc-shaped toothed plate 801, which is slidably connected to the top of the disc 4. The arc-shaped toothed plate 801 meshes with the gear 6. A screw 802 is rotatably connected to the outside of the arc-shaped toothed plate 801. One end of the screw 802 passes through the outside of the sliding sleeve 1 and is threadedly connected to it. By rotating the screw 802, the arc-shaped toothed plate 801 is driven to slide and mesh with the gear 6, thereby realizing the rotation adjustment of the gear 6.

[0032] The top of the sliding sleeve 1 is fixedly connected to a mounting base 14, which can be configured as a clamping seat or a threaded seat, thereby realizing the fixed connection between the sliding sleeve 1 and the power component.

[0033] A specific application of this embodiment is as follows: the sliding sleeve 1 is installed on the power component of the corresponding drilling equipment through the mounting base 14, thereby driving the drill bit 3 to rotate. When it is necessary to adjust the drilling diameter, the drill bit 3 is driven to move downward through the sliding connecting column 2. With the cooperation of the arc-shaped blade 10, the connecting plate 9, the positioning plate 7, the gear 6 and the limiting component 8, the tilt angle of each arc-shaped blade 10 is adjusted and fixed at the same time. This makes it easy to adjust and fix the enlarged hole diameter according to the actual use needs, realize the adjustment of multi-level drilling diameter, and improve the stability of the arc-shaped blade and the connecting plate when the enlarged hole wall is in use.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An adjustable reaming drill bit, comprising a sliding sleeve (1), characterized in that: The sliding sleeve (1) is slidably connected to a connecting column (2), one end of which passes through the bottom of the sliding sleeve (1) and is fixedly connected to a drill bit (3); a disc (4) is fixedly connected inside the sliding sleeve (1) and above the connecting column (2), and a gear (6) is rotatably connected to the top of the disc (4) via a rotating shaft (5); two sets of positioning plates (7) are slidably provided on the periphery of the sliding sleeve (1), and the two positioning plates (7) are staggered in height, and any set of positioning plates (7) is symmetrically arranged about the gear (6); the positioning plates (7) are evenly provided with tooth grooves (701) that mesh with the gear (6) on the side facing the gear (6); the sliding sleeve (1) is provided with a limiting component (8) that meshes with the gear (6); Each of the two adjacent positioning plates (7) is fixedly connected to a connecting plate (9) at one of their opposite ends. The bottom of the connecting plate (9) is hinged with an arc-shaped blade (10). The other end of the arc-shaped blade (10) is hinged to the side of the drill bit (3). A reinforcing slide rod (11) is fixedly connected to one side of the connecting plate (9). The other end of the reinforcing slide rod (11) passes through the adjacent positioning plate (7) and slides in fit.

2. The adjustable reaming drill bit according to claim 1, characterized in that, The sliding sleeve (1) has a through hole (101) on its peripheral side that slides with the positioning plate (7).

3. An adjustable reaming drill bit according to claim 1, characterized in that, The connecting column (2) has a fixed connection of a limiting block (12) in a circular array on its top circumferential side, and the sliding sleeve (1) has a limiting groove (102) that slides with the limiting block (12).

4. An adjustable reaming drill bit according to claim 1, characterized in that, A blade head (13) is fixedly connected to the outer side of the arc-shaped blade wing (10).

5. An adjustable reaming drill bit according to claim 1, characterized in that, The limiting component (8) includes an arc-shaped toothed plate (801), which is slidably connected to the top of the disk (4). The arc-shaped toothed plate (801) meshes with the gear (6). A screw (802) is rotatably connected to the outside of the arc-shaped toothed plate (801). One end of the screw (802) extends through to the outside of the sliding sleeve (1) and is threadedly connected to it.

6. An adjustable reaming drill bit according to claim 1, characterized in that, The top of the sliding sleeve (1) is fixedly connected to the mounting base (14).

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