Pluggable combined drill bit structure

Abstract

The utility model discloses a pluggable combined drill bit structure which comprises a first drill bit and a second drill bit and is further provided with a pluggable connecting cylinder. 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 cylinder; a locking hole is formed in the outer wall of the pluggable connecting cylinder; a locking marble is arranged on the outer side of the locking hole, and a C-shaped locking elastic sheet is buckled on the outer side of the pluggable connecting cylinder; a round hole is formed in the locking elastic sheet; the outer side ends of the locking marbles are located in the round holes. 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 for limiting under the elastic force effect of the C-shaped locking elastic piece. The drill bit is reasonable in structural arrangement, the use requirements of different drill bits can be met in an inserting and pulling mode when the second drill bit needs to be used, the C-shaped locking elastic piece is matched with the locking elastic ball, the overall cost is low, the stability and reliability of connection can be guaranteed, the disassembly, assembly and machining efficiency is improved, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model belongs to a drill bit structure, in particular to a plug-in combined drill bit structure. 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 plug-in combined drill bit structure which has a reasonable structural arrangement and is conducive to improving processing efficiency.

[0004] The technical solution to achieve the purpose of the utility model is a plug-in combined drill bit structure, including a first drill bit and a second drill bit, and a plug-in connection cylinder;

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

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

[0007] The top end of the plug-in connection cylinder is provided with a plug-in cavity;

[0008] A locking hole communicating with the plug-in cavity is provided on the outer wall of the plug-in connection cylinder;

[0009] A locking ball is arranged on the outer side of the locking hole, and a C-shaped locking spring is buckled on the outer side of the plug-in connection cylinder;

[0010] The locking spring piece is provided with a round hole;

[0011] The outer end of the locking marble is located in the circular hole;

[0012] 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 elastic force of the C-shaped locking spring piece.

[0013] 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.

[0014] 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.

[0015] Further preferably, a second drill bit insertion cavity is provided at the bottom end of the plug-in connection cylinder, and a locking screw hole communicating with the second drill bit insertion cavity is provided on the side wall of the plug-in connection cylinder;

[0016] 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.

[0017] It is further preferred that: an external thread is provided on the outer wall of the bottom end of the plug-in connection cylinder;

[0018] A punching depth limiting ring is threadedly connected to the outer wall of the bottom end of the plug-in connection cylinder, and a pressing convex ring is arranged at the bottom end of the punching depth limiting ring.

[0019] It is further preferred that: a hole-reaming cutter body is integrally formed at the bottom end of the plug-in connection cylinder.

[0020] Further preferably, the cross section of the first drill bit is a regular quadrilateral, a regular pentagon, a regular hexagon or a regular octagon.

[0021] It is further preferred that: the inner diameter of the C-shaped locking spring piece is the same as the outer diameter of the plug-in connection cylinder;

[0022] The diameters of the locking hole and the circular hole are both smaller than the diameter of the locking marble.

[0023] It is further preferred that: the C-shaped locking spring piece is a stainless steel sheet with a thickness of 0.1-0.5 mm.

[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, the second drill bit is inserted into the plug-in connection cylinder and locked and fixed by a locking screw. When the second drill bit is needed, the bottom end of the first drill bit can be inserted into the plug-in concave cavity of the plug-in connection cylinder. Under the elastic force of the C-shaped locking spring piece, the inner end of the locking marble will be stuck in the annular locking groove of the first drill bit to fix the second drill bit. At this time, the drill tool is started, and the plug-in connection cylinder is driven by the first drill bit to rotate, and the second drill bit is made to work. After the second drill bit completes the drilling work, the plug-in connection cylinder is directly pulled out from the first drill bit, and the woodworking screw is installed on the first drill bit and drilled 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 met by plugging and unplugging. The C-shaped locking spring piece is matched with the locking marble. The overall cost is low, and the stability and reliability of the connection can be guaranteed. The effectiveness and stability of the second drill bit are guaranteed. When the first drill bit is needed, only the second drill bit and the plug-in connection cylinder need to be unplugged from the first drill bit, which improves the efficiency of disassembly and processing, is convenient to operate, 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 structural schematic diagram of the utility model;

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

[0029] Figure 3 This is a schematic diagram of the structure of the plug-in connection cylinder in the utility model;

[0030] Figure 4 This is a schematic diagram of the specific structure of the C-shaped locking spring in the utility model;

[0031] Figure 5 It is a schematic diagram of the cross-sectional structure of the utility model.

[0032] Figure numerals: first drill bit 1, second drill bit 2, plug-in connecting cylinder 3, locking screw 4, annular locking groove 5, plug-in cavity 6, locking hole 7, locking marble 8, C-shaped locking spring piece 9, round hole 10, second drill bit insertion cavity 11, locking screw hole 12, external thread 13, drilling depth limit ring 14, pressing convex ring 15, reaming tool body 16. DETAILED DESCRIPTION

[0033] 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.

[0034] Example

[0035] See Figures 1 to 5As shown, a plug-in combined drill bit structure includes a first drill bit 1 and a second drill bit 2, and is further provided with a plug-in connection cylinder 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 connection cylinder is a metal structure, which can ensure the strength of the connection.

[0036] In actual application, the second drill bit is inserted into the bottom end of the plug-in connection cylinder 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, a plug-in cavity 6 is provided at the top of the plug-in connection cylinder; a locking hole 7 connected to the plug-in cavity is provided on the outer wall of the plug-in connection cylinder; a locking ball 8 is provided on the outer side of the locking hole, and a C-shaped locking spring piece 9 is buckled on the outer side of the plug-in connection cylinder; a circular hole 10 is provided on the locking spring piece; in this embodiment, the inner diameter of the C-shaped locking spring piece is the same as the outer diameter of the plug-in connection cylinder; the diameters of the locking hole and the circular hole are both smaller than the diameter of the locking ball. The C-shaped locking spring piece is a stainless steel sheet with a thickness of 0.1-0.5mm. Its C-shaped locking spring piece has a strong elastic force and the overall cost is also low.

[0037] During installation, the outer end of the locking marble is in the circular hole; the bottom end of the first drill bit is inserted into the plug-in cavity, and the inner end of the locking marble is stuck in the annular locking groove for limiting position under the elastic force of the C-shaped locking spring. In this embodiment, in order to ensure the rotational stability and reliability of the first drill bit and the plug-in connection cylinder, the cross-section of the first drill bit is a regular polygon, and the cross-sectional shape of the plug-in cavity is the same as the cross-sectional 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. The size of the plug-in cavity is the same as the cross-sectional size of the first drill bit. It mainly ensures that the first drill bit can effectively drive the synchronous rotation of the plug-in connection cylinder by cooperating with the plug-in cavity through the cross-section of the first drill bit, thereby ensuring the effectiveness and reliability of the rotation. In addition, its locking ball cooperates with the C-shaped locking spring piece. After the first drill bit is inserted, it can be locked by the locking ball to prevent loosening or falling off. During installation or disassembly, the external force greater than the elastic force of the C-shaped locking spring piece is required to realize the installation or disassembly operation of the first drill bit.

[0038] In actual application, the bottom end of the plug-in connection cylinder is provided with a second drill bit insertion cavity 11, and the side wall of the plug-in connection cylinder is provided with a locking screw hole 12 connected with 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 in 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 13 is provided on the outer wall of the bottom end of the plug-in connection cylinder; and a punching depth limit ring 14 is threadedly connected to the outer wall of the bottom end of the plug-in connection cylinder, and a pressing convex ring 15 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 limit.

[0040] In actual application, a reaming cutter body 16 is integrally formed at the bottom end of the plug-in connection cylinder.

[0041] 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, the second drill bit is inserted into the plug-in connection cylinder and locked and fixed by a locking screw. When the second drill bit is needed, the bottom end of the first drill bit can be inserted into the plug-in concave cavity of the plug-in connection cylinder. Under the elastic force of the C-shaped locking spring piece, the inner end of the locking marble will be stuck in the annular locking groove of the first drill bit to fix the second drill bit. At this time, the drill tool is started, and the plug-in connection cylinder is driven by the first drill bit to rotate, and the second drill bit is made to work. After the second drill bit completes the drilling work, the plug-in connection cylinder is directly pulled out from the first drill bit, and the woodworking screw is installed on the first drill bit and drilled into the hole drilled by the second drill bit to lock the wooden boards.

[0042] 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 met by plugging and unplugging. The C-shaped locking spring piece is matched with the locking marble. The overall cost is low, and the stability and reliability of the connection can be guaranteed. The effectiveness and stability of the second drill bit are guaranteed. When the first drill bit is needed, only the second drill bit and the plug-in connection cylinder need to be unplugged from the first drill bit, which improves the efficiency of disassembly and processing, is convenient to operate, and has strong practicality.

[0043] 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.

[0044] 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 plug-in combined drill bit structure, comprising a first drill bit and a second drill bit, characterized in that: A plug-in connection cylinder is also provided; The second drill bit is inserted into the bottom end of the plug-in connection cylinder and is fixed by a locking screw; The outer wall of the first drill bit is provided with an annular locking groove; The top end of the plug-in connection cylinder is provided with a plug-in cavity; A locking hole communicating with the plug-in cavity is provided on the outer wall of the plug-in connection cylinder; A locking ball is arranged on the outer side of the locking hole, and a C-shaped locking spring is buckled on the outer side of the plug-in connection cylinder; The locking spring piece is provided with a circular hole; The outer end of the locking marble is located in the circular hole; 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 elastic force of the C-shaped locking spring piece.

2. The plug-in combined drill bit structure according to claim 1, 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.

3. The plug-in combined drill bit structure according to claim 2, characterized in that: The size of the plug-in cavity is the same as the cross-sectional size of the first drill bit.

4. The plug-in combined drill bit structure according to claim 1, characterized in that: A second drill bit insertion cavity is arranged at the bottom end of the plug-in connection cylinder, and a locking screw hole communicating with the second drill bit insertion cavity is arranged on the side wall of the plug-in connection cylinder; 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.

5. The plug-in combined drill bit structure according to claim 4, characterized in that: An external thread is provided on the outer wall of the bottom end of the plug-in connection cylinder; A punching depth limiting ring is threadedly connected to the outer wall of the bottom end of the plug-in connection cylinder, and a pressing convex ring is arranged at the bottom end of the punching depth limiting ring.

6. The plug-in combined drill bit structure according to claim 5, characterized in that: A hole-reaming cutter body is integrally formed at the bottom end of the plug-in connection cylinder.

7. The plug-in combined drill bit structure according to claim 2, 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.

8. The plug-in combined drill bit structure according to claim 1, characterized in that: The inner diameter of the C-shaped locking spring is the same as the outer diameter of the plug-in connection cylinder; The diameters of the locking hole and the circular hole are both smaller than the diameter of the locking marble.

9. The plug-in combined drill bit structure according to claim 1, characterized in that: The C-shaped locking spring piece is a stainless steel sheet with a thickness of 0.1-0.5 mm.

Images