Drill bit with cutting tool bit capable of being replaced easily and rapidly

Abstract

The utility model belongs to the technical field of machining tools, in particular to a drill bit with a cutting tool bit easy to replace quickly, which comprises a drill body, a clamping rod and a square connecting block, an adapter block is fixed at the bottom end of the clamping rod, and the square connecting block is fixed at the top end of the drill body. Clamping blocks are fixed on the opposite surfaces of the two movable plates; the bidirectional threaded screw rod is rotationally mounted in the square connecting cavity; a guide rod; according to the drill body, the square connecting block is inserted into the square connecting cavity, the two-way threaded lead screw is rotated, the two movable plates are close to the inner side to clamp the square connecting block, meanwhile, the clamping block is embedded into the clamping groove to form clamping locking, stable connection of the drill body main body and the clamping rod can be achieved, and the drill body main body and the clamping rod can be disassembled by reversely rotating the two-way threaded lead screw; the square design of the square connecting block and the square connecting cavity has high stability, and relative rotation between the drill body main body and the clamping rod is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of machining tool technology, specifically relating to a drill bit with an easy and quick cutting head replacement. Background Technology

[0002] A machining drill bit is a cutting tool used in the field of mechanical processing to drill holes in various materials. It typically consists of a drill shank, a drill body, and a cutting part. The working principle of a machining drill bit is based on the cutting principle. Driven by a machine tool (such as a drilling machine, lathe, milling machine, machining center, etc.), the drill bit rotates at high speed and feeds along the axial direction. The cutting edge contacts the workpiece material and generates relative motion, gradually removing the material to form the desired hole.

[0003] Currently, existing machined drill bits are usually of one-piece construction. When the drill body is severely worn, the entire drill bit needs to be replaced, which is costly.

[0004] A search revealed that Chinese utility model patent CN222457346U discloses "a drill bit with a quick-change cutting head", which includes a drill bit body and a cutting head body. The drill bit body is provided with a replacement mechanism on its exterior, and the replacement mechanism is provided with a limit mechanism on its exterior. The replacement mechanism includes a connecting seat and a connecting groove. A rotating groove is provided on the inner side of the connecting groove, and a positioning component is provided at one end of the rotating groove.

[0005] While existing drill bits, including those mentioned above, are convenient to replace, in actual use, because the drill bit needs to rotate at high speed and generate high torque during operation, the stability of the rotating cutter head body and the drill bit body is difficult to guarantee, as they are only reinforced by fixing posts (actually bolts). The cutter head body and the drill bit body are prone to relative rotation.

[0006] To address the aforementioned problems, this utility model proposes a drill bit with an easily and quickly replaceable cutting head. Utility Model Content

[0007] To address the aforementioned problems in the existing technology, this utility model provides a drill bit with an easy and quick-change cutting head, which features convenient use, easy assembly and disassembly, and high stability.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a drill bit with easily and quickly replaceable cutting heads, comprising a drill body and a clamping rod, wherein an adapter block is fixed at the bottom end of the clamping rod, and further comprising:

[0009] A square connecting block is fixed to the top of the drill body. The adapter block has a square connecting cavity for the square connecting block to be embedded in, and two symmetrically distributed slots are machined on the outer wall of the square connecting block.

[0010] The movable plates are symmetrically distributed in the square connecting cavity, and a locking block is fixed on the opposite side of each of the two movable plates, the locking block fitting into the locking slot;

[0011] A bidirectional threaded screw is rotatably mounted in the square connecting cavity, with one end of the bidirectional threaded screw extending out of the adapter block. The bidirectional threaded screw passes through the moving plate and is connected to the moving plate by a threaded engagement.

[0012] Two guide rods are symmetrically fixed inside the square connecting cavity and pass through the movable plate.

[0013] In a preferred embodiment of this invention, the width of the square connecting block is equal to the width of the square connecting cavity.

[0014] As a preferred technical solution of this utility model, it also includes:

[0015] Positioning blocks, two of which are symmetrically fixed to the inner wall of the square connecting cavity, and the square connecting block passes through the inner space of the two positioning blocks.

[0016] As a preferred embodiment of this utility model, the length of the square connecting block is equal to the inner distance between the two positioning blocks.

[0017] In a preferred embodiment of this invention, the outer wall of the card block abuts against the inner wall of the card slot.

[0018] As a preferred technical solution of this utility model, it also includes:

[0019] A cross knob is fixed to the extended end of the bidirectional threaded screw.

[0020] As a preferred technical solution of this utility model, it also includes:

[0021] A regular hexagonal auxiliary block is fixed to the end face of the cross knob.

[0022] As a preferred technical solution of this utility model, it also includes:

[0023] Two sets of telescopic rods are symmetrically fixed to the top surface of the square connecting cavity;

[0024] Positioning pressure plates, two of which are symmetrically distributed in the square connecting cavity and fixed to the bottom end of the telescopic rod, and a clearance groove for the bidirectional threaded rod to be inserted is machined at the top of the square connecting block;

[0025] A telescopic spring is sleeved on the telescopic rod and located between the top surface of the square connecting cavity and the positioning pressure plate.

[0026] A limiting block is fixed to the bottom surface of the positioning plate, and a limiting groove for the limiting block to be embedded is machined on the top surface of the square connecting block.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] In this invention, a square connecting block is inserted into a square connecting cavity, and the bidirectional threaded screw is rotated to bring the two moving plates closer together to clamp the square connecting block. At the same time, the locking block is embedded in the slot to form a locking engagement, thus achieving a stable connection between the drill body and the clamping rod. The bidirectional threaded screw can be rotated in the opposite direction to disassemble the drill body. The square design of the square connecting block and the square connecting cavity has high stability and avoids relative rotation between the drill body and the clamping rod.

[0029] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0033] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the diagram;

[0034] Figure 4 This is a partial exploded view of the structure of this utility model.

[0035] In the diagram: 1. Drill body; 11. Square connecting block; 111. Slot; 112. Limiting slot; 113. Clearance slot; 12. Positioning block; 2. Adapter block; 21. Square connecting cavity; 3. Clamping rod; 4. Moving plate; 41. Locking block; 5. Two-way threaded screw; 51. Cross knob; 52. Hexagonal auxiliary block; 53. Guide rod; 6. Telescopic rod; 7. Positioning pressure plate; 8. Telescopic spring; 9. Limiting block. Detailed Implementation

[0036] 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.

[0037] Please see Figures 1-4 The present invention provides the following technical solution: a drill bit with easy and quick replacement of cutting head, including a drill body body 1 and a clamping rod 3, with an adapter block 2 fixed at the bottom end of the clamping rod 3, and also including: a square connecting block 11, a moving plate 4, a bidirectional threaded screw 5 and a guide rod 53.

[0038] Furthermore, by Figures 1-4As shown, in this embodiment, the square connecting block 11 is fixed to the top of the drill body 1. The adapter block 2 has a square connecting cavity 21 for the square connecting block 11 to be embedded in. Two symmetrically distributed slots 111 are machined on the outer wall of the square connecting block 11. Two moving plates 4 are symmetrically distributed within the square connecting cavity 21, and a locking block 41 is fixed on each of the opposite surfaces of the two moving plates 4. The locking block 41 engages with the slots 111. A bidirectional threaded screw 5 is rotatably installed within the square connecting cavity 21, with one end of the bidirectional threaded screw 5 extending out of the adapter block 2. The bidirectional threaded screw 5 passes through the moving plate 4 and is connected to the moving plate 4 via a threaded engagement. Two guide rods 53 are symmetrically fixed within the square connecting cavity 21 and pass through the moving plate 4. With the above scheme, during use, the square connecting block... The square connecting block 11 is inserted into the square connecting cavity 21. Then, the bidirectional threaded screw 5 is rotated, causing the two moving plates 4 to move closer together inward under the screw rotation, ultimately clamping the square connecting block 11. The locking block 41 is embedded in the locking groove 111 to form a locking engagement, thus achieving the connection between the drill body 1 and the clamping rod 3. In this utility model, the square connecting block 11 is inserted into the square connecting cavity 21, and the bidirectional threaded screw 5 is rotated, causing the two moving plates 4 to move closer together inward to clamp the square connecting block 11. At the same time, the locking block 41 is embedded in the locking groove 111 to form a locking engagement, thus achieving a stable connection between the drill body 1 and the clamping rod 3. The bidirectional threaded screw 5 can be rotated in the opposite direction to disassemble the drill body 1. The square design of the square connecting block 11 and the square connecting cavity 21 has high stability and avoids relative rotation between the drill body 1 and the clamping rod 3.

[0039] Preferably, by Figures 1-4 As shown, in this embodiment, the width of the square connecting block 11 is equal to the width of the square connecting cavity 21. With the above solution, when the square connecting block 11 is inserted into the square connecting cavity 21, the outer wall of the square connecting block 11 fits the inner wall of the square connecting cavity 21, which has high stability and can effectively prevent the drill body 1 from rotating unexpectedly.

[0040] It should be noted that, in actual use, the drill body 1 and the square connecting block 11 are preferably machined integral components with high structural strength.

[0041] Preferably, by Figures 1-3 As shown, this embodiment also includes: positioning blocks 12, two positioning blocks 12 are symmetrically fixed to the inner wall of the square connecting cavity 21, and the square connecting block 11 passes through the inner space of the two positioning blocks 12. With the above solution, in use, the two positioning blocks 12 are used to further position the insertion position of the square connecting block 11.

[0042] Preferably, by Figures 1-3As shown in this embodiment, the length of the square connecting block 11 is equal to the inner distance between the two positioning blocks 12. After adopting the above scheme, when the square connecting block 11 is inserted into the square connecting cavity 21, the outer wall of the square connecting block 11 fits against the opposite surfaces of the two positioning blocks 12, which has high stability and can further improve the stability of the drill body 1 and prevent the drill body 1 from rotating unexpectedly.

[0043] Preferably, by Figures 1-4 As shown, in this embodiment, the outer wall of the card block 41 abuts against the inner wall of the card groove 111. With the above solution, this close fit has high stability during use, ensuring that the card block 41 and the card groove 111 can fit precisely, and ensuring the stability of the drill body 1 installation.

[0044] Preferably, by Figures 1-4 As shown, this embodiment also includes a cross knob 51, which is fixed to the extended end of the bidirectional threaded screw 5. With the above solution, the bidirectional threaded screw 5 can be easily rotated manually by the cross knob 51 during use.

[0045] Preferably, by Figures 1-4 As shown, this embodiment also includes: a regular hexagonal auxiliary block 52, which is fixed to the end face of the cross knob 51. With the above solution, during use, the bidirectional threaded screw 5 can be easily rotated with a wrench by using the set regular hexagonal auxiliary block 52.

[0046] Preferably, by Figures 1-4 As shown, this embodiment also includes: a telescopic rod 6, a positioning pressure plate 7, a telescopic spring 8, and a limiting block 9. Two sets of telescopic rods 6 are symmetrically fixed to the top surface of the square connecting cavity 21. Two positioning pressure plates 7 are symmetrically distributed in the square connecting cavity 21 and fixed to the bottom end of the telescopic rod 6. A clearance groove 113 for embedding a bidirectional threaded screw 5 is machined on the top of the square connecting block 11. The telescopic spring 8 is sleeved on the telescopic rod 6 and is located between the top surface of the square connecting cavity 21 and the positioning pressure plate 7. The limiting block 9 is fixed to the bottom surface of the positioning pressure plate 7. A limiting groove 11 for embedding the limiting block 9 is machined on the top surface of the square connecting block 11. 2. After adopting the above scheme, when in use, the telescopic rod 6 is a telescopic structure composed of two hollow cylindrical components connected together. After the drill body 1 is installed, the limiting block 9 is embedded in the limiting groove 112, and the square connecting block 11 is topped with two positioning pressure plates 7. The telescopic rod 6 and the telescopic spring 8 are in a contracted state. Its reverse elastic force will press down the square connecting block 11 through the positioning pressure plate 7, which further improves the stability of the drill body 1 installation. In addition, the vibration generated by the drill body 1 during operation will be transmitted to the telescopic spring 8. The telescopic spring 8 buffers the vibration of the drill body 1 by generating elastic deformation, which has a certain anti-vibration effect.

[0047] Components not described in detail in this article are existing technologies.

[0048] The working principle and usage process of this utility model: When using the drill body 1 of this utility model, the square connecting block 11 is inserted into the square connecting cavity 21, and then the bidirectional threaded screw 5 is rotated so that the two moving plates 4 move closer to the inside under the threaded rotation action, and finally clamp the square connecting block 11. The locking block 41 is embedded in the locking groove 111 to form a locking and realize the connection between the drill body 1 and the clamping rod 3.

[0049] This utility model inserts the square connecting block 11 into the square connecting cavity 21 and rotates the bidirectional threaded screw 5 so that the two moving plates 4 move closer to the inside to clamp the square connecting block 11. At the same time, the locking block 41 is embedded in the locking groove 111 to form a locking engagement, thereby achieving a stable connection between the drill body 1 and the clamping rod 3. The bidirectional threaded screw 5 can be rotated in the opposite direction to disassemble it.

[0050] The square design of the square connecting block 11 and the square connecting cavity 21 has high stability and avoids relative rotation between the drill body 1 and the clamping rod 3.

[0051] In another aspect of this utility model, after the drill body 1 is installed, the limiting block 9 is embedded in the limiting groove 112, and the square connecting block 11 is topped with two positioning pressure plates 7. The telescopic rod 6 and the telescopic spring 8 are in a contracted state, and their reverse elastic force will press down on the square connecting block 11 through the positioning pressure plates 7, which further improves the stability of the drill body 1 installation. Furthermore, the vibration generated by the drill body 1 during operation will be transmitted to the telescopic spring 8. The telescopic spring 8 will buffer the vibration of the drill body 1 by generating elastic deformation, which has a certain anti-vibration effect.

[0052] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A drill bit with easily and quickly replaceable cutting heads, comprising a drill body (1) and a clamping rod (3), wherein an adapter block (2) is fixed to the bottom end of the clamping rod (3), characterized in that, Also includes: A square connecting block (11) is fixed to the top of the drill body (1). The adapter block (2) has a square connecting cavity (21) for the square connecting block (11) to be embedded in. Two symmetrically distributed slots (111) are machined on the outer wall of the square connecting block (11). Movable plate (4), two movable plates (4) are symmetrically distributed in the square connecting cavity (21), and a locking block (41) is fixed on the opposite side of the two movable plates (4), the locking block (41) and the locking groove (111) are engaged; A bidirectional threaded screw (5) is rotatably installed in the square connecting cavity (21), and one end of the bidirectional threaded screw (5) extends out of the adapter block (2). The bidirectional threaded screw (5) passes through the moving plate (4) and is connected to the moving plate (4) by thread engagement. Guide rods (53), two of the guide rods (53) are symmetrically fixed in the square connecting cavity (21) and pass through the moving plate (4).

2. A drill bit with easily and quickly replaceable cutting heads according to claim 1, characterized in that: The width of the square connecting block (11) is equal to the width of the square connecting cavity (21).

3. A drill bit with easily and quickly replaceable cutting heads according to claim 1, characterized in that: Also includes: Positioning blocks (12), two positioning blocks (12) are symmetrically fixed to the inner wall of the square connecting cavity (21), and the square connecting block (11) passes through the inner space of the two positioning blocks (12).

4. A drill bit with an easily and quickly replaceable cutting head according to claim 3, characterized in that: The length of the square connecting block (11) is equal to the inner distance between the two positioning blocks (12).

5. A drill bit with easily and quickly replaceable cutting heads according to claim 1, characterized in that: The outer wall of the card block (41) abuts against the inner wall of the card slot (111).

6. A drill bit with an easily and quickly replaceable cutting head according to claim 1, characterized in that: Also includes: A cross knob (51) is fixed to the extended end of the bidirectional threaded screw (5).

7. A drill bit with easily and quickly replaceable cutting heads according to claim 6, characterized in that: Also includes: A regular hexagonal auxiliary block (52) is fixed to the end face of the cross knob (51).

8. A drill bit with easily and quickly replaceable cutting heads according to claim 1, characterized in that: Also includes: Telescopic rods (6), two sets of telescopic rods (6) are symmetrically fixed to the top surface inside the square connecting cavity (21); Positioning pressure plate (7), two positioning pressure plates (7) are symmetrically distributed in the square connecting cavity (21) and fixed to the bottom end of the telescopic rod (6). A clearance groove (113) for the bidirectional threaded screw (5) to be embedded is machined on the top end of the square connecting block (11). A telescopic spring (8) is sleeved on the telescopic rod (6) and located between the top surface of the square connecting cavity (21) and the positioning pressure plate (7); A limiting block (9) is fixed to the bottom surface of the positioning plate (7), and a limiting groove (112) for the limiting block (9) to be embedded is machined on the top surface of the square connecting block (11).

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