Drill bit connecting structure with self-locking function

Abstract

The utility model provides a drill bit connecting structure with a self-locking function, which belongs to the field of drill bits and comprises a drill rod and a tool bit. The connecting assembly is fixedly connected to clamping rods on the left side and the right side of the top of the tool bit, clamping grooves are formed in the left side and the right side of the bottom of the drill rod correspondingly, outer end blocks are further fixedly connected to the left side and the right side of the front side of the drill rod, stepped grooves are formed in one sides of the outer end blocks, and clamping blocks are slidably connected into the stepped grooves. And one side of each clamping block is fixedly connected with an abutting block, one side of each stepped groove is further fixedly connected with a spring, the two ends of each spring abut against one side of the corresponding stepped groove and one side of the corresponding adjacent clamping block, and arc-shaped grooves are formed in the drill rod and the outer end block correspondingly. By means of the connecting assembly, when the tool bit needs to be replaced, a new tool bit is pushed upwards into the drill rod, self-locking can be achieved, matching of additional connecting pieces is not needed, operation for replacing the tool bit is simple, labor is sufficiently saved, and use is relatively convenient.

Description

Technical Field

[0001] This utility model relates to drill bit technology, specifically a drill bit connection structure with a self-locking function. Background Technology

[0002] Drill bits are the main tools in the hole-making process. To ensure the quality of the machined hole and to consider the processing speed, different drill bits are usually selected depending on the object being machined. Currently, drill bits on the market are usually designed with the cutting head and drill rod as a single unit. When the cutting head is damaged, the entire drill bit needs to be replaced. To save costs, drill bits with replaceable cutting heads have emerged.

[0003] Most existing replaceable drill bits cannot be directly locked after insertion when connected to the drill rod; instead, they require screws or pins for auxiliary locking. This connection process involves multiple steps and is laborious in removing and installing screws and pins, making it inconvenient to use. Therefore, we propose a drill bit connection structure with a self-locking function to solve the above-mentioned problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a drill bit connection structure with self-locking function to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solution: including a drill rod and a cutter head;

[0006] The connecting assembly is fixedly connected to the locking rods on the top left and right sides of the cutter head. The bottom left and right sides of the drill rod are respectively provided with locking grooves. The front left and right sides of the drill rod are also fixedly connected to the outer end blocks. One side of the outer end block is provided with a stepped groove. A locking block is slidably connected in the stepped groove. A stop block is fixedly connected to one side of the locking block. A spring is also fixedly connected to one side of the stepped groove. The two ends of the spring abut against the stepped groove and one side of the adjacent locking block, respectively. The drill rod and the outer end block are both provided with arc-shaped grooves. An adjusting rod is movably connected in the arc-shaped grooves. The two locking blocks are respectively set on the outside of the adjusting rod.

[0007] Preferably, the lever is provided with a horizontal stop, and the top of the horizontal stop is provided with a chamfer.

[0008] Preferably, the bottom of the card block is provided with an inclined surface, and a circular hole is provided on one side of the card block, with the circular hole and the adjusting rod being interference fit.

[0009] Preferably, the outer end block has a plurality of positioning holes, and the drill rod has threaded holes at the same position on its lower outer side.

[0010] Preferably, the maximum height of the stepped groove is adapted to the height of the abutment block, and the minimum height of the stepped groove is adapted to the maximum height of the locking block.

[0011] Preferably, the two end faces of the adjusting rod are adapted to the outer contour of the drill rod, and the two end faces of the adjusting rod are provided with anti-slip texture.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] With the set connection component, when it is necessary to replace the cutter head, the new cutter head can be pushed upward into the drill pipe to achieve self-locking. No additional connecting parts are required. The operation of replacing the connecting cutter head is simple and labor-saving, making it relatively convenient to use. Attached Figure Description

[0014] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0017] Figure 3 yes Figure 2 An enlarged schematic diagram of part A is shown below;

[0018] Figure 4 This is a partially enlarged structural schematic diagram of this utility model.

[0019] In the diagram: 1. Drill rod; 2. Cutting head; 3. Clamping rod; 4. Clamping groove; 5. Outer end block; 6. Stepped groove; 7. Clamping block; 8. Abutment block; 9. Spring; 10. Arc groove; 11. Adjusting rod; 12. Horizontal stop block. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Please see Figures 1-4 As shown, a drill bit connection structure with a self-locking function includes a drill rod 1 and a cutter head 2;

[0022] The connecting assembly is fixedly connected to the locking rods 3 on the top left and right sides of the cutter head 2. The bottom left and right sides of the drill rod 1 are respectively provided with locking grooves 4. The front left and right sides of the drill rod 1 are also fixedly connected with outer end blocks 5. A stepped groove 6 is provided on one side of the outer end block 5. A locking block 7 is slidably connected in the stepped groove 6. A stop block 8 is fixedly connected on one side of the locking block 7. A spring 9 is also fixedly connected on one side of the stepped groove 6. The two ends of the spring 9 abut against the stepped groove 6 and the side of the adjacent locking block 7, respectively. Arc grooves 10 are provided on both the drill rod 1 and the outer end block 5. An adjusting rod 11 is movably connected in the arc groove 10. Two locking blocks 7 are respectively set on the outside of the adjusting rod 11.

[0023] It should be noted that the locking rod 3 is used to position the cutter head 2 in conjunction with the locking groove 4. The outer end block 5 is designed separately from the drill rod 1 to facilitate the installation of the locking block 7. The stepped groove 6 also facilitates the insertion of the locking block 7. At the same time, the locking block 7 is restricted within the stepped groove 6 by cooperating with the stop block 8 to prevent it from coming out. The spring 9 ensures that the locking block 7 always protrudes outward to lock the locking rod 3. The arc groove 10 allows the adjusting rod 11 to move the two locking blocks 7, making it convenient to control the locking blocks 7 to retract into the stepped groove 6 from the outside, which facilitates the separation of the cutter head 2 and the drill rod 1. Through the set connecting components, when the cutter head 2 needs to be replaced, the new cutter head 2 can be pushed upward into the drill rod 1 to achieve self-locking without the need for additional connecting parts. The operation of replacing the connecting cutter head 2 is simple and labor-saving, and relatively convenient to use.

[0024] A horizontal stop 12 is provided on the locking rod 3. The top of the horizontal stop 12 is chamfered. The horizontal stop 12 is used to cooperate with the locking block 7 to lock the position of the cutter head 2 under the drill rod 1, so that it cannot be separated from the drill rod 1, and it is convenient to self-lock after installation.

[0025] The bottom of the locking block 7 is provided with a slope, and a round hole is opened on one side of the locking block 7. The round hole and the adjusting rod 11 are interference fit. The slope allows the top of the locking rod 3 to push the shoe surface to retract the locking block 7 into the stepped groove 6 when the cutter head 2 is inserted into the drill rod 1, so as to avoid it blocking the movement of the cutter head 2 and facilitate installation.

[0026] The outer end block 5 has several positioning holes, and the drill rod 1 has a threaded hole at the same position on its lower outer side. The positioning holes and the threaded hole can be used to connect and fix the outer end block 5 and the drill rod 1 through a locking device.

[0027] The maximum height of the stepped groove 6 is adapted to the height of the stop block 8, and the minimum height of the stepped groove 6 is adapted to the maximum height of the locking block 7. The stepped groove 6 is used to cooperate with the stop block 8 to limit the locking block 7, so that it can only move within the stepped groove 6 and cannot be disengaged, thus ensuring stability during use.

[0028] The two end faces of the adjusting rod 11 are adapted to the outer contour of the drill rod 1. The two end faces of the adjusting rod 11 are provided with anti-slip texture. The anti-slip texture can increase the friction when pushing the adjusting rod 11, making it easier for the operator to push the adjusting rod 11 from the outside and making it convenient to operate.

[0029] In practical implementation of this utility model: when a new cutter head needs to be replaced, press the ends of the two adjusting rods 11 and push them to move to the other end in the arc groove 10 through contact friction. This causes the locking block 7 and the stop block 8 on them to move in the stepped groove 6, compressing the spring 9 so that the locking rod 3 is no longer blocked. Pull the cutter head 2 down to make the locking rod 3 slide out of the slot 4. Insert the new cutter head 2 upward so that the locking rod 3 is inserted into the slot 4. The chamfer on the locking rod 3 and the inclined surface of the locking block 7 work together to push the locking block 7, which was pushed out of the stepped groove 6 by the spring 9, back into the stepped groove 6 until the horizontal block no longer blocks the locking block 7. The locking block 7 pops out under the elastic force of the spring 9 and is locked under the horizontal block 12. At this time, the installation of the new cutter head 2 is completed.

[0030] 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 any specific implementation. 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. A drill bit connection structure with a self-locking function, characterized in that, include: Drill rod (1) and cutter head (2); The connecting assembly is fixedly connected to the locking rods (3) on the top left and right sides of the cutter head (2). The bottom left and right sides of the drill rod (1) are respectively provided with locking grooves (4). The front left and right sides of the drill rod (1) are also fixedly connected with outer end blocks (5). A stepped groove (6) is provided on one side of the outer end block (5). A locking block (7) is slidably connected in the stepped groove (6). A stop block (8) is fixedly connected on one side of the locking block (7). A spring (9) is also fixedly connected on one side of the stepped groove (6). The two ends of the spring (9) abut against one side of the stepped groove (6) and the adjacent locking block (7). An arc groove (10) is provided on both the drill rod (1) and the outer end block (5). An adjusting rod (11) is movably connected in the arc groove (10). The two locking blocks (7) are respectively set on the outside of the adjusting rod (11).

2. The drill bit connection structure with self-locking function according to claim 1, characterized in that, The lever (3) is provided with a horizontal stop (12), and the top of the horizontal stop (12) is provided with a chamfer.

3. The drill bit connection structure with self-locking function according to claim 2, characterized in that, The bottom of the card block (7) is provided with an inclined surface, and a round hole is provided on one side of the card block (7). The round hole and the adjusting rod (11) are interference fit.

4. The drill bit connection structure with self-locking function according to claim 3, characterized in that, The outer end block (5) has several positioning holes, and the drill rod (1) has threaded holes at the same position on its lower outer side.

5. A drill bit connection structure with self-locking function according to claim 4, characterized in that, The maximum height of the stepped groove (6) is adapted to the height of the abutment block (8), and the minimum height of the stepped groove (6) is adapted to the maximum height of the locking block (7).

6. A drill bit connection structure with self-locking function according to claim 5, characterized in that, The two ends of the adjusting rod (11) are adapted to the outer contour of the drill rod (1), and the two ends of the adjusting rod (11) are provided with anti-slip texture.

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