Lock catch type drill bit assembly

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Through the design of the lock type drill bit assembly, the use of plug-and-removal connectors and locking marble mechanisms, the complex operation problems of existing drill bits are solved, and the rapid exchange and fixation of drill bits are achieved, which improves the convenience of use and processing efficiency.

CN222360352UActive Publication Date: 2025-01-17林加恒

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Patent Information

Application Number: CN202421213672.6
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-05-30
Publication Date: 2025-01-17
Estimated Expiration: 2034-05-30

AI Technical Summary

Technical Problem

Existing drill bits need to be frequently disassembled and installed during use, which is complicated to operate, which increases the labor intensity of workers and affects processing efficiency, limits applicability and practicality.

Method used

A lock type drill bit assembly is designed to achieve rapid exchange and fixation of the first drill bit and the second drill bit by plugging and unplugging the connector and the locking marble mechanism. The coupling between the lock bit and the spring is used to ensure the smoothness of the connection. and reliability.

Benefits of technology

It improves the convenience of use and processing efficiency of drill bits, reduces overall cost, and ensures the effective use and quick disassembly of different drill bits.

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Abstract

The utility model discloses a lock catch type drill bit assembly which comprises a first drill bit and a second drill bit and is further provided with a plug-pull connecting piece. An annular locking groove is formed in the outer wall of the first drill bit; a plugging concave cavity is formed in the top end of the plugging connecting piece; a locking hole is formed in the outer wall of the plugging connecting piece, two limiting clamping grooves are formed in the outer wall of the plugging connecting piece, a locking marble is arranged on the outer side of the locking hole, a locking piece is arranged on the outer wall of the plugging connecting piece, clamping springs are arranged in the limiting clamping grooves, and the locking piece is limited through the two clamping springs; the bottom end of the first drill bit is inserted into the inserting and pulling cavity, and the inner side end of the locking marble is clamped into the annular locking groove to be limited under abutting and pressing of the locking piece. The second drill bit is reasonable in structural arrangement, the use requirements of different drill bits can be met through pressing and resetting of the locking piece, the stability and reliability of connection can be guaranteed, the effectiveness and stability of work of the second drill bit are guaranteed, the disassembly, assembly and machining efficiency is improved, and the use convenience is improved.

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Description

Technical Field

[0001] The utility model belongs to the technical field of drill bits, and in particular relates to a lock-type drill bit assembly. Background Art

[0002] When using an electric drill, it is generally necessary to install a corresponding drill bit, such as a second drill bit or a first drill bit. When processing some wooden boards, locking screws need to be installed. In order to ensure the accuracy of the screw hole position and prevent the wooden board from cracking, the second drill bit is generally used to drill a hole smaller than the outer diameter of the woodworking screw thread at the position, and then the first drill bit is replaced to drill the woodworking screw into the hole drilled by the second drill bit to lock the wooden board. Although it can meet the general usage needs, its operation is very complicated. Tools need to be used to remove the corresponding drill bit from the electric drill and then install another drill bit, which greatly increases the labor intensity of workers and affects the processing efficiency. Therefore, its applicability and practicality are limited. Utility Model Content

[0003] The utility model aims to provide a lock-type drill bit assembly with reasonable structural arrangement and conducive to improving convenience.

[0004] The technical solution to achieve the purpose of the utility model is a lock-type drill bit assembly, including a first drill bit and a second drill bit, and also provided with a plug-in connector;

[0005] The second drill bit is inserted into the bottom end of the plug-in connector and is fixed by a locking screw;

[0006] The outer wall of the first drill bit is provided with an annular locking groove;

[0007] A plug-in cavity is formed at the top of the plug-in connector;

[0008] A locking hole communicating with the plug-in cavity is provided on the outer wall of the plug-in connector, and two limiting slots are provided on the outer wall of the plug-in connector, wherein the locking hole is located between the two limiting slots;

[0009] A locking ball is arranged on the outer side of the locking hole, a locking piece is arranged on the outer wall of the plug-in connector, and a retaining spring is arranged in the limiting slot, and the locking piece is limited by two retaining springs;

[0010] The bottom end of the first drill bit is inserted into the plug-in cavity, and the inner end of the locking ball is clamped into the annular locking groove for limiting position under the pressure of the locking member.

[0011] It is further preferred that: the locking member comprises a cylinder and a spring;

[0012] The inner wall end of the cylinder is provided with a trumpet-shaped inclined surface, the middle part of the inner wall of the cylinder is provided with a limiting convex ring, the locking ball abuts against the trumpet-shaped inclined surface and the limiting convex ring is located at the small hole end of the trumpet-shaped inclined surface;

[0013] The spring is arranged between the retaining spring and the limiting convex ring, and the spring is arranged at an end away from the trumpet-shaped inclined surface;

[0014] The cylinder presses the locking marble to resist different positions of the trumpet-shaped inclined surface, and the cylinder is reset under the action of the spring when the external force disappears.

[0015] Further preferably, the cross section of the first drill bit is a regular polygon, and the cross section shape of the plugging and extraction cavity is the same as the cross section shape of the first drill bit.

[0016] Further preferably, the cross section of the first drill bit is a regular quadrilateral, a regular pentagon, a regular hexagon or a regular octagon.

[0017] It is further preferred that: the size of the plug-in cavity is the same as the cross-sectional size of the first drill bit.

[0018] Further preferably, a second drill bit insertion cavity is provided at the bottom end of the plug-in connector, and a locking screw hole communicating with the second drill bit insertion cavity is provided on the side wall of the plug-in connector;

[0019] The second drill bit is inserted into the second drill bit insertion cavity, and the locking screw is threadedly connected in the locking screw hole.

[0020] It is further preferred that: an external thread is provided on the outer wall of the bottom end of the plug connector;

[0021] A punching depth limiting ring is threadedly connected to the outer wall of the bottom end of the plug-in connector, and a pressing convex ring is arranged at the bottom end of the punching depth limiting ring.

[0022] It is further preferred that: a hole-reaming cutter body is integrally formed at the bottom end of the plug-in connector.

[0023] It is further preferred that the diameter of the locking holes is smaller than the diameter of the locking marbles.

[0024] Its working principle is briefly described as follows: when in use, one end of the first drill bit is fixed on the drill tool and locked, and the second drill bit is inserted on the plug-in connection cylinder and locked and fixed by a locking screw. When the second drill bit is needed, external force presses the locking piece and compresses the spring. At this time, the locking ball is at the end with a larger diameter of the trumpet-shaped inclined surface. The bottom end of the first drill bit is inserted, and the first drill bit will squeeze the locking ball outward. When the external force disappears, the locking piece is reset under the action of the spring, and the outer end of the locking ball abuts against the end with a smaller diameter of the trumpet-shaped inclined surface. At this time, the inner end of the locking ball is stuck in the annular locking groove of the first drill bit to fix the second drill bit. At this time, start the drill tool, and the first drill bit drives the plug-in connection piece to rotate, and makes the second drill bit work. After the second drill bit completes the drilling work, press the locking piece and pull the plug-in connection piece off the first drill bit, install the woodworking screw on the first drill bit and drill it into the hole drilled by the second drill bit to lock the wooden boards.

[0025] The utility model has positive effects: the structure of the utility model is reasonably set up. When the second drill bit is needed, the use requirements of different drill bits can be achieved by pressing and resetting the locking piece. The locking piece cooperates with the locking marbles, and the overall cost is low. It can also ensure the stability and reliability of the connection, and ensure the effectiveness and stability of the second drill bit. When the first drill bit is needed, it is only necessary to unplug the second drill bit and the plug-in connector from the first drill bit, which improves the efficiency of disassembly and processing, is conducive to improving the convenience of use, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the content of the utility model easier to understand, the utility model is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein:

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0029] Figure 3 It is a structural schematic diagram of the plug-in connector in the utility model;

[0030] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model.

[0031] Figure numerals: first drill bit 1, second drill bit 2, plug-in connector 3, locking screw 4, annular locking groove 5, plug-in cavity 6, locking hole 7, locking marble 8, locking member 9, cylinder 91, spring 92, trumpet-shaped inclined surface 93, limiting convex ring 94, limiting slot 10, retaining spring 11, second drill bit insertion cavity 12, locking screw hole 13, external thread 14, drilling depth limiting ring 15, pressing convex ring 16, reaming tool body 17. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Example

[0034] See Figures 1 to 4 As shown, a lock-type drill bit assembly includes a first drill bit 1 and a second drill bit 2, and is also provided with a plug-in connector 3; in this embodiment, the first drill bit and the second drill bit are different, the first drill bit can be a screw drill bit or a screwdriver bit, and the second drill bit can be a punch drill bit. The plug-in connector is a metal structure, which can ensure the strength of the connection.

[0035] In actual application, the second drill bit is inserted into the bottom end of the plug-in connector and is locked and fixed by a locking screw 4; the outer wall of the first drill bit is provided with an annular locking groove 5; at the same time, the top of the plug-in connector is provided with a plug-in cavity 6; the outer wall of the plug-in connector is provided with a locking hole 7 connected to the plug-in cavity, and the outer wall of the plug-in connector is provided with two limiting slots 10, and the locking hole is located between the two limiting slots; the outer side of the locking hole is provided with a locking ball 8, and the diameter of the locking hole is smaller than the diameter of the locking ball. A locking piece 9 is provided on the outer wall of the plug-in connector, and a retaining spring 11 is provided in the limiting slot, and the locking piece is limited by two retaining springs; in this embodiment, the retaining spring is mainly used to limit the locking piece. When installing, first install a retaining spring far away from the end point, then install the locking piece, and then install the retaining spring close to the end point to limit the locking piece. The retaining spring is a conventional structure of the prior art and is simply applied.

[0036] During installation, the bottom end of the first drill bit is inserted into the plug-in cavity, and the inner end of the locking ball is clamped into the annular locking groove under the pressure of the locking member to limit the position. In actual application, the locking member includes a cylinder 91 and a spring 92; and the inner wall end of the cylinder is provided with a trumpet-shaped inclined surface 93, and the middle part of the inner wall of the cylinder is provided with a limiting convex ring 94, the locking ball abuts against the trumpet-shaped inclined surface and the limiting convex ring is at the small hole end of the trumpet-shaped inclined surface; and during assembly, the spring is arranged between the retaining spring and the limiting convex ring, and the spring is arranged at one end away from the trumpet-shaped inclined surface; and the cylinder presses the locking ball to abut against different positions of the trumpet-shaped inclined surface, and when the external force disappears, the cylinder is reset under the action of the spring. When the cylinder is pressed, the locking ball is at the large diameter end of the trumpet-shaped inclined surface. At this time, the locking ball can move outward a small distance, thereby facilitating the insertion of the first drill bit. When the external force disappears, the cylinder is reset to squeeze the locking ball sideways and make the inner end of the locking spring fit into the annular locking groove of the first drill bit for positioning.

[0037] In order to ensure the stability and reliability of installation, the cross-section of the first drill bit is a regular polygon, and the cross-section shape of the plug-in cavity is the same as the cross-section shape of the first drill bit. Specifically, the cross-section of the first drill bit is a regular quadrilateral, a regular pentagon, a regular hexagon or a regular octagon. And the size of the plug-in cavity is the same as the cross-section size of the first drill bit. It is mainly through the cross-section of the first drill bit to cooperate with the plug-in cavity to ensure that the first drill bit can effectively drive the synchronous rotation of the plug-in connector to ensure the effectiveness and reliability of the rotation. After the first drill bit is inserted, it can be locked by the locking marble to prevent loosening or falling off. When installing or disassembling, the external force needs to be greater than the elastic force of the C-shaped locking spring piece to realize the installation or disassembly operation of the first drill bit. The regular polygon can ensure that the first drill bit can stably drive the synchronous rotation of the plug-in connector.

[0038] In actual application, the bottom end of the plug connector is provided with a second drill bit insertion cavity 12, and the side wall of the plug connector is provided with a locking screw hole 13 connected to the second drill bit insertion cavity; during installation, the second drill bit is inserted into the second drill bit insertion cavity, and the locking screw is threadedly connected to the locking screw hole, so as to ensure the stability and reliability of the use of the second drill bit.

[0039] In actual application, an external thread 14 is provided on the outer wall of the bottom end of the plug connector; a punching depth limit ring 15 is threadedly connected to the outer wall of the bottom end of the plug connector, and a pressing convex ring 16 is provided at the bottom end of the punching depth limit ring. The corresponding position can be adjusted through the above structure, so that the punching depth can be adjusted. When punching, the pressing convex ring will abut against the surface of the workpiece to achieve position limiting. In actual application, a hole reaming cutter body 17 is integrally formed at the bottom end of the plug connector.

[0040] Its working principle is briefly described as follows: when in use, one end of the first drill bit is fixed on the drill tool and locked, and the second drill bit is inserted on the plug-in connection cylinder and locked and fixed by a locking screw. When the second drill bit is needed, external force presses the locking piece and compresses the spring. At this time, the locking ball is at the end with a larger diameter of the trumpet-shaped inclined surface. The bottom end of the first drill bit is inserted, and the first drill bit will squeeze the locking ball outward. When the external force disappears, the locking piece is reset under the action of the spring, and the outer end of the locking ball abuts against the end with a smaller diameter of the trumpet-shaped inclined surface. At this time, the inner end of the locking ball is stuck in the annular locking groove of the first drill bit to fix the second drill bit. At this time, start the drill tool, and the first drill bit drives the plug-in connection piece to rotate, and makes the second drill bit work. After the second drill bit completes the drilling work, press the locking piece and pull the plug-in connection piece off the first drill bit, install the woodworking screw on the first drill bit and drill it into the hole drilled by the second drill bit to lock the wooden boards.

[0041] The utility model has positive effects: the structure of the utility model is reasonably set up. When the second drill bit is needed, the use requirements of different drill bits can be achieved by pressing and resetting the locking piece. The locking piece cooperates with the locking marbles, and the overall cost is low. It can also ensure the stability and reliability of the connection, and ensure the effectiveness and stability of the second drill bit. When the first drill bit is needed, it is only necessary to unplug the second drill bit and the plug-in connector from the first drill bit, which improves the efficiency of disassembly and processing, is conducive to improving the convenience of use, and has strong practicality.

[0042] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification can also be directly processed according to existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0043] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still belong to the protection scope of the present invention.

Claims

1. A lock-type drill bit assembly, comprising a first drill bit and a second drill bit, characterized in that: A plug-in connector is also provided; The second drill bit is inserted into the bottom end of the plug-in connector and is fixed by a locking screw; The outer wall of the first drill bit is provided with an annular locking groove; A plug-in cavity is formed at the top of the plug-in connector; A locking hole communicating with the plug-in cavity is provided on the outer wall of the plug-in connector, and two limiting slots are provided on the outer wall of the plug-in connector, wherein the locking hole is located between the two limiting slots; A locking ball is arranged on the outer side of the locking hole, a locking piece is arranged on the outer wall of the plug-in connector, and a retaining spring is arranged in the limiting slot, and the locking piece is limited by two retaining springs; The bottom end of the first drill bit is inserted into the plug-in cavity, and the inner end of the locking ball is clamped into the annular locking groove for limiting position under the pressure of the locking member.

2. A lock-type drill bit assembly according to claim 1, characterized in that: The locking member comprises a cylinder and a spring; The inner wall end of the cylinder is provided with a trumpet-shaped inclined surface, the middle part of the inner wall of the cylinder is provided with a limiting convex ring, the locking ball abuts against the trumpet-shaped inclined surface and the limiting convex ring is located at the small hole end of the trumpet-shaped inclined surface; The spring is arranged between the retaining spring and the limiting convex ring, and the spring is arranged at an end away from the trumpet-shaped inclined surface; The cylinder presses the locking marble to resist different positions of the trumpet-shaped inclined surface, and the cylinder is reset under the action of the spring when the external force disappears.

3. A lock-type drill bit assembly according to claim 2, characterized in that: The cross section of the first drill bit is a regular polygon, and the cross section shape of the plug-in cavity is the same as the cross section shape of the first drill bit.

4. A lock-type drill bit assembly according to claim 3, characterized in that: The cross section of the first drill bit is a regular quadrilateral, a regular pentagon, a regular hexagon or a regular octagon.

5. A lock-type drill bit assembly according to claim 4, characterized in that: The size of the plug-in cavity is the same as the cross-sectional size of the first drill bit.

6. A lock-type drill bit assembly according to claim 1, characterized in that: A second drill bit insertion cavity is disposed at the bottom end of the plug-in connector, and a locking screw hole communicating with the second drill bit insertion cavity is disposed on the side wall of the plug-in connector; The second drill bit is inserted into the second drill bit insertion cavity, and the locking screw is threadedly connected in the locking screw hole.

7. A lock-type drill bit assembly according to claim 6, characterized in that: An external thread is provided on the outer wall of the bottom end of the plug connector; A punching depth limiting ring is threadedly connected to the outer wall of the bottom end of the plug-in connector, and a pressing convex ring is arranged at the bottom end of the punching depth limiting ring.

8. A lock-type drill bit assembly according to claim 7, characterized in that: A hole-reaming cutter body is integrally formed at the bottom end of the plug-in connector.

9. The lock-type drill bit assembly according to claim 1, characterized in that: The diameter of the locking holes is smaller than the diameter of the locking marbles.