Diameter expanding drill bit convenient to fix

Abstract

The utility model belongs to the technical field of drill bits, particularly relates to a diameter-expanding drill bit convenient to fix, and aims to solve the problems that an existing drill bit is troublesome to assemble and the accuracy and the stability of the drill bit in the installation process cannot be ensured, the following scheme is provided: the diameter-expanding drill bit comprises a drill bit fixing handle, and one end of the drill bit fixing handle is connected with a connector; a fixing mechanism used for rapidly fixing the drill bit is arranged on the outer surface of the drill bit fixing handle, and a dismounting mechanism used for dismounting the drill bit is arranged at the other end of the drill bit fixing handle. The fixing mechanism comprises two pressing rods, the two pressing rods are both installed on the outer wall of the drill bit fixing handle, and connecting rods are fixed to the tail ends of the two pressing rods. In the self-extension process of the spring, the connecting rod is pushed to reset, so that the tail end of the fixing rod is inserted into the insertion hole in the connector, and then the drill bit fixing handle is quickly assembled and fixed.

Description

Technical Field

[0001] This utility model relates to a drill bit for enlarging diameter, specifically a drill bit for enlarging diameter that is easy to fix, and belongs to the field of drill bit technology. Background Technology

[0002] A reaming drill, also known as a borehole reamer, is a special type of drill designed to enlarge an existing hole to a desired size by progressively increasing the hole's diameter through rotation and cutting. The working principle of a reaming drill is based on a combination of axial and rotational forces. When the drill is driven to rotate, its carbide or steel cutting edge contacts the workpiece material, progressively enlarging the hole diameter through rotation and cutting. The cutting edge is typically designed with multiple cutting teeth to achieve efficient material removal and ensure the hole's accuracy and smoothness.

[0003] In existing technologies, such as the enlarged diameter threaded drill bit structure disclosed in CN219887978U, a drill bit body is included. Threaded teeth are provided on the outer side of the drill bit body, and enlarged diameter teeth are slidably connected to the sidewall of the drill bit body. A receiving groove is provided within the drill bit body, and a driving telescopic mechanism is provided within the receiving groove. The driving telescopic mechanism is used to realize the extension and retraction of the enlarged diameter teeth, and the length of the enlarged diameter teeth is greater than the height of the threaded teeth. This direct connection between the threaded teeth and the enlarged diameter teeth to the drill bit body results in high strength between the enlarged diameter teeth and the drill bit body, reducing the likelihood of breakage or detachment of the enlarged diameter teeth during enlarged diameter drilling, thus improving the stability of enlarged diameter drilling operations.

[0004] The aforementioned technical solution uses threaded teeth and expanding teeth to directly connect to the drill bit body, resulting in high strength between the expanding teeth and the drill bit body. However, this method is cumbersome to assemble the drill bit and cannot ensure the accuracy and stability of the drill bit during installation. Therefore, this paper provides an expanding drill bit that is easy to fix to overcome the above-mentioned shortcomings. Utility Model Content

[0005] This invention provides a drill bit for expanding the diameter that is easy to fix, in order to solve the problem that the assembly of drill bits is cumbersome and cannot ensure the accuracy and stability of the drill bit during the installation process.

[0006] The present invention achieves the above objectives through the following technical solution: a drill bit for expanding diameter that is easy to fix, comprising a drill bit fixing shank, one end of the drill bit fixing shank being connected to a connector, the outer surface of the drill bit fixing shank being provided with a fixing mechanism for quickly fixing the drill bit, and the other end of the drill bit fixing shank being provided with a disassembly mechanism for disassembling the drill bit.

[0007] The fixing mechanism includes two pressing rods, both of which are installed on the outer wall of the drill bit fixing handle. Each pressing rod has a connecting rod fixed to its end. One end of the connecting rod is fixed to a fixing rod, and a spring is connected to one side of the connecting rod.

[0008] As a further improvement of this utility model, the drill bit fixing shank has two mounting cavities that match the connecting rod inside.

[0009] As a further improvement of this utility model: the fixed rod is internally slidably connected to a limiting block, and one end of the limiting block is fixedly connected to a limiting rod that is fixedly connected to the inner wall of the mounting cavity.

[0010] As a further improvement of this utility model: the disassembly mechanism includes a slot, which is located at the other end of the drill bit fixing shank, and a locking rod is inserted into the slot.

[0011] As a further improvement of this utility model: a limiting hole is provided on the outer surface of the chuck, and a fixing bolt that is threadedly connected to the drill bit fixing shank is inserted into the limiting hole.

[0012] As a further improvement of this utility model, a drill bit body is fixed to the end of the clamp rod.

[0013] As a further improvement of this utility model, the outer surface of the drill bit body is provided with a plurality of chip removal grooves.

[0014] The beneficial effects of this utility model are: during the extension of the spring itself, the connecting rod will be pushed to return to its original position, so that the end of the fixing rod is inserted into the socket inside the connector, thereby quickly assembling and fixing the drill bit fixing shank.

[0015] By unscrewing the fixing bolt, the end of the fixing bolt is separated from the limiting hole, thus releasing the fixing of the clamp rod. With the cooperation of the clamp groove, the drill bit body can be disassembled for easy use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional structural diagram of the drill bit fixing shank of this utility model;

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

[0019] Figure 4 This is a cross-sectional structural diagram of the fixing rod of this utility model.

[0020] In the diagram: 1. Drill bit retaining shank; 2. Connector; 3. Pressing rod; 31. Connecting rod; 32. Fixing rod; 33. Mounting cavity; 34. Limiting block; 35. Limiting rod; 36. Spring; 4. Slot; 41. Locking rod; 42. Limiting hole; 43. Fixing bolt; 5. Drill bit body; 6. Chip removal groove. 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. 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. Example 1

[0022] like Figures 1 to 4 As shown, a drill bit for expanding the diameter that is easy to fix includes a drill bit fixing shank 1, one end of which is connected to a connector 2, the outer surface of the drill bit fixing shank 1 is provided with a fixing mechanism for quickly fixing the drill bit, and the other end of the drill bit fixing shank 1 is provided with a disassembly mechanism for disassembling the drill bit.

[0023] The fixing mechanism includes two pressing rods 3, both of which are installed on the outer wall of the drill bit fixing handle 1. A connecting rod 31 is fixed to the end of each pressing rod 3. A fixing rod 32 is fixed to one end of each connecting rod 31. A spring 36 is connected to one side of each connecting rod 31. Two mounting cavities 33, matching the connecting rods 31, are opened inside the drill bit fixing handle 1. A limiting block 34 is slidably connected inside the fixing rod 32. A limiting rod 35, fixed to the inner wall of the mounting cavity 33, is fixed to one end of the limiting block 34. By manually pressing the pressing rods 3 on the drill bit fixing handle 1, the connecting rods 31... The fixed rod 32 moves and retracts into the mounting cavity 33. At the same time, the connecting rod 31 compresses the spring 36 during its movement. After the drill bit fixing shank 1 is fully inserted into the connector 2, the pressing rod 3 is manually released. During the extension of the spring 36, the connecting rod 31 is pushed back to its original position, allowing the end of the fixed rod 32 to be inserted into the insertion hole inside the connector 2. This allows for quick assembly and fixation of the drill bit fixing shank 1. The limiting block 34 inside the fixed rod 32, in conjunction with the limiting rod 35, can play a limiting role, thus preventing the fixed rod 32 from falling off. Example 2

[0024] In addition to all the technical features in Embodiment 1, this embodiment also includes: a disassembly mechanism comprising a slot 4, which is located at the other end of the drill bit fixing shank 1. A locking rod 41 is inserted into the slot 4. A limiting hole 42 is formed on the outer surface of the locking rod 41. A fixing bolt 43, which is threadedly connected to the drill bit fixing shank 1, is inserted into the limiting hole 42. A drill bit body 5 is fixed to the end of the locking rod 41. Several chip removal grooves 6 are formed on the outer surface of the drill bit body 5. The machine tool drives the drill bit fixing shank 1, thereby driving the drill bit body 5 to rotate and enlarge the workpiece. The chip removal grooves 6 can achieve the function of chip removal. When the drill bit body 5 needs to be disassembled, the fixing bolt 43 can be unscrewed, so that the end of the fixing bolt 43 is separated from the limiting hole 42, and the fixing of the locking rod 41 is released. With the cooperation of the slot 4, the drill bit body 5 can be disassembled for convenient use.

[0025] Working principle: Before using the easily fixed expanding drill bit, the operator can insert the drill bit retaining shank 1 into the connector 2 located on the output shaft of the machine tool drive equipment. Before inserting the drill bit retaining shank 1, manually press the pressing rod 3 on the drill bit retaining shank 1, causing the connecting rod 31 to drive the fixing rod 32 to move. At this time, the fixing rod 32 retracts into the mounting cavity 33. Simultaneously, the connecting rod 31 will push the spring 36 to compress during its movement. After the drill bit retaining shank 1 is fully inserted into the connector 2, manually release the pressing rod 3. During the extension of the spring 36, it will push the connecting rod 31 to return to its original position, allowing the end of the fixing rod 32 to insert. The drill bit fixing shank 1 is quickly assembled and fixed by inserting it into the connector 2. The limiting block 34 inside the fixing rod 32, in cooperation with the limiting rod 35, can play a limiting role, thereby preventing the fixing rod 32 from falling off. The machine tool drives the drill bit fixing shank 1, which in turn drives the drill bit body 5 to rotate, enlarging the workpiece. The chip removal groove 6 can realize the chip removal function. When the drill bit body 5 needs to be disassembled, the fixing bolt 43 can be unscrewed, so that the end of the fixing bolt 43 separates from the limiting hole 42, releasing the fixing of the clamping rod 41. With the cooperation of the clamping groove 4, the drill bit body 5 can be disassembled for easy use.

[0026] 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.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A drill bit for reaming that is easy to fix, comprising a drill bit retaining shank (1), characterized in that: One end of the drill bit fixing shank (1) is connected to a connector (2), the outer surface of the drill bit fixing shank (1) is provided with a fixing mechanism for quickly fixing the drill bit, and the other end of the drill bit fixing shank (1) is provided with a disassembly mechanism for disassembling the drill bit. The fixing mechanism includes a pressing rod (3), and there are two pressing rods (3). Both pressing rods (3) are installed on the outer wall of the drill bit fixing handle (1). A connecting rod (31) is fixed at the end of each pressing rod (3). A fixing rod (32) is fixed at one end of the connecting rod (31). A spring (36) is connected to one side of the connecting rod (31).

2. The drill bit for reaming that is easy to fix according to claim 1, characterized in that: The drill bit retainer (1) has two mounting cavities (33) inside that match the connecting rod (31).

3. A drill bit for reaming that is easy to fix, as described in claim 2, characterized in that: The fixed rod (32) is internally slidably connected to a limiting block (34), and one end of the limiting block (34) is fixed with a limiting rod (35) that is fixedly connected to the inner wall of the mounting cavity (33).

4. A drill bit for reaming that is easy to fix, as described in claim 1, characterized in that: The disassembly mechanism includes a slot (4), which is located at the other end of the drill bit fixing shank (1), and a locking rod (41) is inserted into the slot (4).

5. A drill bit for reaming that is easy to fix, as described in claim 4, characterized in that: The outer surface of the locator (41) has a limiting hole (42), and a fixing bolt (43) that is threadedly connected to the drill bit fixing shank (1) is inserted into the limiting hole (42).

6. A drill bit for reaming that is easy to fix, as described in claim 5, characterized in that: The drill bit body (5) is fixed to the end of the chuck (41).

7. A drill bit for reaming that is easy to fix, as described in claim 6, characterized in that: The outer surface of the drill bit body (5) is provided with several chip removal grooves (6).

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