A composite step drill

Abstract

The utility model relates to the technical field of drill bit, concretely is a kind of composite ladder drill bit, including drill bit body, the top of drill bit body is provided with drill rod, the bottom of drill rod is provided with mounting hole, the top of drill bit body is provided with mounting post, the mounting post is provided with positioning hole, the outer wall of drill rod is provided with slot. This kind of composite ladder drill bit, by the cooperation of drill bit body, drill rod, connector, connecting hole, limit sleeve, mounting hole, mounting post, positioning hole, sliding slot, spring, sliding rod, sliding block, locating post and slot, make drill bit body and drill rod connection stable, firm. Limit sleeve and spring cooperation ensure that locating post is stable, avoid sliding out when running. Realized the detachable connection of both, drill bit wear seriously can be replaced separately, reduce use cost. And detachable structure is simple, and operation is convenient, and user can quickly replace drill bit.

Description

Technical Field

[0001] This utility model relates to the field of drill bit technology, specifically a composite stepped drill bit. Background Technology

[0002] Composite step drills typically consist of multiple cylindrical sections of varying diameters, arranged in ascending order of diameter to form a stepped shape. The drill head usually employs a special geometric design, such as a common tapered design, to facilitate penetration into the workpiece material. Furthermore, the drill surface often features helical grooves for chip removal and coolant delivery.

[0003] Currently, some composite stepped drill bits have significant drawbacks in practical applications. Their drill rod and drill bit are mostly designed as an integrated unit, lacking a detachable structure. When the drill bit wears out due to frequent use, it is impossible to accurately replace the drill bit individually. Often, the entire drill bit must be replaced. This not only wastes resources but also greatly increases the cost of using the drill bit, which is not conducive to cost control in the production process.

[0004] Therefore, it is necessary to provide a composite stepped drill bit to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a composite stepped drill bit to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A composite step drill bit, comprising:

[0008] The drill bit body has a drill rod at its top end and a mounting hole at its bottom end. The drill bit body also has a mounting post at its top end and a positioning hole on the mounting post. The drill rod has a slot on its outer wall that penetrates the interior of the mounting hole. The positioning post is slidably inserted into the drill rod through the slot, and the positioning post is adapted to the positioning hole.

[0009] A limit mechanism is provided on the outer wall of the drill pipe.

[0010] Preferably, a hidden groove is provided on the outer wall of the drill rod at the port of the slot, and a baffle adapted to the hidden groove is fixedly installed at one end of the positioning post. A groove is provided on the outer surface of the baffle, and a pull ring is hinged inside the groove.

[0011] Preferably, the limiting mechanism includes two sliding grooves, which are symmetrically distributed on the outer surface of the drill rod. A sliding rod is fixedly installed inside the sliding groove. A slider is sleeved on the outer wall of the sliding rod and is slidably installed on the sliding groove. A spring is sleeved on the outer wall of the sliding rod at the bottom of the slider. A limiting sleeve is slidably sleeved on the outer wall of the drill rod, and the slider is fixedly connected to the lower side of the inner surface of the limiting sleeve.

[0012] Preferably, the slider has a sliding hole that matches the slide rod, and the slider is slidably connected to the slide rod through the sliding hole.

[0013] Preferably, the outer surface of the limiting sleeve is provided with a plurality of annular anti-slip protrusions.

[0014] Preferably, the drill bit body and the mounting post are integrally formed.

[0015] Preferably, the mounting post is rectangular in shape and is adapted to the mounting hole.

[0016] Preferably, the top end of the drill rod is provided with a connector, and the connector has a plurality of connection holes.

[0017] Preferably, the outer surface of the baffle is an arc-shaped surface, and the arc of the outer surface of the baffle is consistent with the arc of the outer wall of the drill rod, and the outer surface of the baffle slides against the inner wall of the limiting sleeve.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model utilizes the coordinated use of the drill bit body, drill rod, connector, connecting hole, limiting sleeve, mounting hole, mounting post, positioning hole, slide groove, spring, slide rod, slider, positioning post, and slot to ensure a stable and secure connection between the drill bit body and the drill rod. The limiting sleeve and spring work together to ensure the stability of the positioning post and prevent it from slipping out during operation. This achieves a detachable connection between the two components, allowing for individual replacement of the drill bit when it is severely worn, reducing operating costs. Furthermore, the detachable structure is simple and easy to operate, enabling users to quickly replace the drill bit, ensuring normal equipment use while saving costs and greatly improving practicality.

[0020] 2. This utility model, through the combined use of a baffle, a hidden groove, a recess, and a pull ring, allows the operator to quickly pull the positioning post out of the slot by pulling the pull ring, which, through the conduction effect of the baffle, when operating on the positioning post. The pull ring provides the operator with an effective force point, making the disassembly and installation of the positioning post more efficient and convenient, further enhancing the convenience of the device in actual use. Attached Figure Description

[0021] Figure 1This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is an exploded structural diagram of the drill bit body and drill rod in this utility model;

[0023] Figure 3 This is a cross-sectional view of the limiting sleeve in this utility model;

[0024] Figure 4 This is a cross-sectional view of the drill pipe in this utility model.

[0025] In the diagram: 1. Drill bit body; 2. Drill rod; 3. Connector; 4. Connecting hole; 5. Limiting sleeve; 6. Mounting hole; 7. Mounting post; 8. Positioning hole; 9. Baffle; 10. Hidden groove; 11. Groove; 12. Pull ring; 13. Slide groove; 14. Spring; 15. Slide rod; 16. Slider; 17. Positioning post; 18. Slot. 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 protection scope of the present utility model.

[0027] Please see Figures 1-4 One embodiment provided by this utility model:

[0028] A composite step drill bit, comprising:

[0029] The drill bit body 1 has a drill rod 2 at its top end and a mounting hole 6 at its bottom end. The drill bit body 1 also has a mounting post 7 at its top end and a positioning hole 8 on the mounting post 7. The drill rod 2 has a slot 18 on its outer wall, which penetrates the interior of the mounting hole 6. The drill rod 2 is slidably inserted into the positioning post 17 through the slot 18, and the positioning post 17 is adapted to the positioning hole 8.

[0030] A limit mechanism is provided on the outer wall of drill pipe 2.

[0031] A hidden groove 10 is provided on the outer wall of the drill rod 2 at the port of the slot 18. A baffle 9 that matches the hidden groove 10 is fixedly installed at one end of the positioning post 17. A groove 11 is provided on the outer surface of the baffle 9. A pull ring 12 is hinged inside the groove 11. The hidden groove 10 accommodates the baffle 9 to make the structure compact. The groove 11 hides the pull ring 12 without affecting the appearance. The pull ring 12 makes it easy to insert and remove the positioning post 17, which is convenient for operation and maintenance.

[0032] In one embodiment, the limiting mechanism includes two slide grooves 13, which are symmetrically distributed on the outer surface of the drill rod 2. A slide rod 15 is fixedly installed inside the slide groove 13. A slider 16 is sleeved on the outer wall of the slide rod 15 and is slidably installed on the slide groove 13. A spring 14 is sleeved on the outer wall of the slide rod 15 at the bottom of the slider 16. A limiting sleeve 5 is slidably sleeved on the outer wall of the drill rod 2, and the slider 16 is fixedly connected to the lower side of the inner surface of the limiting sleeve 5, thereby achieving the limiting effect on the positioning post 17 and ensuring the stable connection between the drill bit body 1 and the drill rod 2.

[0033] In one preferred embodiment, the slider 16 has a sliding hole that matches the slide rod 15, and the slider 16 is slidably connected to the slide rod 15 through the sliding hole, so that the slider 16 moves more stably and smoothly, can move accurately along the slide rod 15, and ensures the accuracy and reliability of the operation of related components.

[0034] In one embodiment, the outer surface of the limiting sleeve 5 is provided with several annular anti-slip protrusions to increase friction, facilitate disassembly and assembly by operators, prevent slippage, and improve safety and convenience of use.

[0035] In one preferred embodiment, the drill bit body 1 and the mounting post 7 are integrally formed, which enhances the structural strength and integrity and prevents the connection from loosening or breaking.

[0036] In one embodiment, the mounting post 7 is a rectangular column and is adapted to the mounting hole 6, which can prevent the drill bit body 1 from rotating relative to the drill rod 2, ensure connection stability, and make the drill bit work more reliably.

[0037] In one preferred embodiment, the top end of the drill rod 2 is provided with a connector 3, and the connector 3 has a plurality of connecting holes 4 to facilitate the connection of the drill rod 2 with the drilling machine drive structure, etc.

[0038] In one embodiment, the outer surface of the baffle 9 is an arc-shaped surface, and the arc of the outer surface of the baffle 9 is consistent with the arc of the outer wall of the drill rod 2. The outer surface of the baffle 9 slides against the inner wall of the limiting sleeve 5, so that the baffle 9 can stably abut against the limiting sleeve 5, thereby achieving stable positioning of the positioning post 17.

[0039] The working principle of this utility model is as follows: During installation, the drill rod 2 is connected to the drive structure of the drilling machine through the connecting hole 4 on its bottom connector 3. Then, the limiting sleeve 5 is slid upward. The movement of the limiting sleeve 5 causes the slider 16 to slide on the outer wall of the slide rod 15 and squeeze the spring 14. As the slide rod 15 moves upward, the limiting sleeve 5 loses its limiting effect on the outer end of the positioning post 17. At this time, the positioning post 17 can be pulled out from the inside of the slot 18. Then, the mounting post 7 at the top of the drill bit body 1 is inserted into the inside of the mounting hole 6 at the bottom of the drill rod 2. With the mounting post 7 in place, the positioning post 17 is inserted into the inside of the slot 18 again. The positioning post 17 will penetrate the inside of the positioning hole 8 on the mounting post 7, firmly locking the mounting post 7 inside the mounting hole 6, completing the installation of the drill bit body 1 at the bottom of the drill rod 2. At the same time, the limiting sleeve 5 is released. Under the elastic action of the spring 14, the limiting sleeve 5 will... The slider 16 drives the limiting sleeve 5 to reset, which limits the outer end of the mounting post 7 and covers the outer port of the slot 18, ensuring that the mounting post 7 is stably inserted into the slot 18. This prevents the positioning post 17 from sliding out of the slot 18 during the operation of the drill bit body 1, ensuring the stability and firmness of the quick connection between the drill bit body 1 and the drill rod 2. When replacing the drill bit body 1 later, the same operation method is used: first slide the limiting sleeve 5 upward, and then pull out the positioning post 17 to remove the drill bit body 1 from the bottom of the drill rod 2. This achieves a detachable connection between the drill bit body 1 and the drill rod 2, allowing the drill bit body 1 to be replaced separately when it is severely worn, reducing the usage cost of the drill bit body 1. At the same time, the detachable structure between the drill bit body 1 and the drill rod 2 is simple, easy to operate, and facilitates quick replacement by users, making it highly practical.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A composite stepped drill bit, characterized in that, It includes: The drill bit body (1) has a drill rod (2) at its top end and a mounting hole (6) at its bottom end. The drill bit body (1) has a mounting post (7) at its top end and a positioning hole (8) on the mounting post (7). The drill rod (2) has a slot (18) on its outer wall and the slot (18) penetrates the interior of the mounting hole (6). The drill rod (2) is slidably inserted with a positioning post (17) through the slot (18), and the positioning post (17) is adapted to the positioning hole (8). A limit mechanism is provided on the outer wall of the drill rod (2).

2. The composite stepped drill bit according to claim 1, characterized in that: A hidden groove (10) is provided on the outer wall of the drill rod (2) at the port of the slot (18). A baffle (9) that matches the hidden groove (10) is fixedly installed at one end of the positioning post (17). A groove (11) is provided on the outer surface of the baffle (9). A pull ring (12) is hinged inside the groove (11).

3. A composite stepped drill bit according to claim 1, characterized in that: The limiting mechanism includes two slide grooves (13), which are symmetrically distributed on the outer surface of the drill rod (2). A slide rod (15) is fixedly installed inside the slide groove (13). A slider (16) is sleeved on the outer wall of the slide rod (15), and the slider (16) is slidably installed on the slide groove (13). A spring (14) is sleeved on the outer wall of the slide rod (15) at the bottom of the slider (16). A limiting sleeve (5) is slidably sleeved on the outer wall of the drill rod (2), and the slider (16) is fixedly connected to the lower side of the inner surface of the limiting sleeve (5).

4. A composite stepped drill bit according to claim 3, characterized in that: The slider (16) has a sliding hole that matches the sliding rod (15), and the slider (16) is slidably connected to the sliding rod (15) through the sliding hole.

5. A composite stepped drill bit according to claim 3, characterized in that: The outer surface of the limiting sleeve (5) is provided with several annular anti-slip protrusions.

6. A composite stepped drill bit according to claim 1, characterized in that: The drill bit body (1) and the mounting post (7) are integrally formed.

7. A composite stepped drill bit according to claim 1, characterized in that: The mounting post (7) is rectangular in shape and is adapted to the mounting hole (6).

8. A composite stepped drill bit according to claim 1, characterized in that: The drill rod (2) is provided with a connector (3) at its top end, and the connector (3) has several connecting holes (4).

9. A composite stepped drill bit according to claim 2, characterized in that: The outer surface of the baffle (9) is an arc-shaped surface, and the arc of the outer surface of the baffle (9) is consistent with the arc of the outer wall of the drill rod (2). The outer surface of the baffle (9) slides against the inner wall of the limiting sleeve (5).

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