CN218192742U

CN218192742U - Detachable drill bit

Info

Publication number: CN218192742U
Application number: CN202222209068.3U
Authority: CN
Inventors: 廖长娇; 陈升盛
Original assignee: Shenzhen Zhongyeda Precision Technology Co ltd
Current assignee: Shenzhen Zhongyeda Precision Technology Co ltd
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2023-01-03
Anticipated expiration: 2032-08-22

Abstract

The utility model relates to a mechanical material processing equipment technical field specifically is a detachable drill bit, include: the tool bit, the connecting handle and the fixing pin; the lower end of the cutter head is inserted into the top end of the connecting handle along the axis direction, and the fixing pin is inserted into the side wall of the connecting handle along the direction vertical to the axis direction and is abutted against the side surface of the cutter head; the length of the connecting handle is three times of the length of the cutter head. The embodiment of the utility model provides a through the mode of pegging graft with the detachable connection of handle, fix the connection of the two with the fixed pin, it is more convenient simple when dismantling the tool bit or changing the tool bit, also reduced the processing cost; the length of the connecting handle is set to be three times that of the cutter head, so that the drill can stretch into a deeper scene to operate, and the application range of the drill is enlarged.

Description

Detachable drill bit

Technical Field

The utility model relates to a mechanical material processing equipment technical field especially relates to a drilling tool.

Background

The electric drill is a drilling machine using electricity as power, can be applied to a drilling machine and a pistol drill, is a conventional product in electric tools, and is also a product of the electric tools with the largest demand. The working principle of the electric drill is that a motor rotor of an electromagnetic rotary or electromagnetic reciprocating small-capacity motor does magnetic field cutting work-doing operation, and the transmission mechanism drives the operation device to drive the gear to increase the power of the drill bit, so that the drill bit scrapes the surface of an object and better penetrates the object.

When the drill bit works, due to the uncertainty of the composition of a drilled object, the front end drilling tooth part of the drill bit and the thread part of the screw rod can be abraded due to hard substances, the drilling effect can be influenced, once abrasion or cutting edge damage and the like occur, the drill bit needs to be replaced, the durability is poor, the working efficiency is reduced due to frequent replacement of the drill bit, other good parts can be wasted, and the drilling cost is increased.

The detachable drill bit is produced according to the defects, but some existing detachable drill bits are generally complex in structure and troublesome to install, and connecting handles of the detachable drill bits are very short and short, so that the detachable drill bit is not suitable for drilling scenes needing deep operation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a detachable drill bit of easy dismounting and long connection handle has.

In order to achieve the above object, the utility model provides a following technical scheme: a detachable drill bit, comprising: the tool bit, the connecting handle and the fixing pin are arranged on the tool bit;

the lower end of the cutter head is inserted into the top end of the connecting handle along the axis direction, and the fixing pin is inserted into the side wall of the connecting handle along the direction vertical to the axis direction and is abutted against the side surface of the cutter head;

the length of the connecting handle is three times of the length of the cutter head.

Preferably, the top end of the connecting handle is provided with a connecting hole downwards along the axis, the aperture of the connecting hole is the same as the axial diameter of the cutter head, and the depth of the connecting hole is 1/3 of the length of the cutter head.

Preferably, the diameter of the shaft of the cutter head is 1/3 of that of the shaft of the connecting handle.

Preferably, a threaded hole perpendicular to the axis is formed in the side wall of the upper portion of the connecting handle, and the threaded hole penetrates through the side wall of the connecting handle and is communicated with the connecting hole.

Preferably, the surface of the side wall of the fixing pin is processed with external threads, and the external threads of the fixing pin are matched with the internal threads of the threaded hole.

Preferably, the top surface of the outer end of the fixing pin is provided with an inner hexagonal groove.

Preferably, the length of the fixing pin is greater than 1/2 of the diameter of the connecting shank.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the tool bit and the connecting handle are detachably connected in an inserting mode, and the connection of the tool bit and the connecting handle is fixed by the fixing pin, so that the tool bit is more convenient and simpler to detach or replace;

2. the length of the connecting handle is set to be three times of that of the cutter head, so that the drill can stretch into a deeper scene to operate, and the application range of the drill is enlarged.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is an exploded view of a detachable drill according to the present invention;

fig. 2 is a perspective view of a detachable drill according to the present invention;

fig. 3 is a left side view of a detachable drill according to the present invention;

fig. 4 is a schematic cross-sectional view of a detachable drill according to the present invention.

In the figure: 10. a cutter head; 20. a connecting handle; 21. connecting holes; 22. a threaded hole; 30. a fixing pin; 31. an inner hexagonal groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is to be understood that the described embodiments are only some embodiments, not all embodiments, and furthermore, the terms "first", "second", "third", "upper, lower, left, right", etc. are used for descriptive purposes only to facilitate the description of the present invention and simplify the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are used for illustrative purposes only and are not to be construed as limiting, indicating or implying relative importance to the present patent, and the specific meanings of the terms can be understood according to specific situations by those skilled in the art. Meanwhile, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or electrical connection; can be directly connected with each other, also can be indirectly connected with each other through the intermediary, based on the embodiment in the utility model, all other embodiments that ordinary skilled in the art obtained under the prerequisite of not making creative work all belong to the scope of protection of the utility model.

The following describes the implementation of the present invention in detail with reference to specific embodiments.

As shown in fig. 1-4, which are examples provided by the present invention.

An embodiment of the utility model provides a detachable drill bit, include: a cutter head 10, a connecting handle 20 and a fixing pin 30; the lower end of the cutter head 10 is inserted into the top end of the connecting handle 20 along the axial direction, and the fixing pin 30 is inserted into the side wall of the connecting handle 20 along the direction perpendicular to the axial direction and is abutted against the side surface of the cutter head 10; the length L1 of the connecting handle 20 is three times the length L2 of the cutting head 10.

In the embodiment of the present invention, the tool bit 10 is a drill bit with a conventional shape, the arbor is inserted into the middle of the top end of the connecting handle 20, the tool bit 10 is coaxial with the connecting handle 20, the fixing pin 30 is inserted from the outer wall of the connecting handle 20 and extends to the surface of the arbor and clamps the tool bit 10 from the side, it can be understood that the inner end of the fixing pin 30 must be capable of abutting against the arbor at the lower end of the tool bit 10 but not lower than the lowest end of the arbor; the length L1 of the connecting handle 20 is far longer than the length L2 of the cutter head 10, so that the cutter head 10 can be extended into a deeper scene for operation, and the application range of the drill bit is expanded.

The top end of the connecting handle 20 is provided with a connecting hole 21 along the axis downwards, the aperture D3 of the connecting hole 21 is the same as the axial diameter D2 of the cutter head 10, and the depth L3 of the connecting hole 21 is 1/3 of the length L2 of the cutter head 10. The shaft diameter D2 of the cutter head 10 is 1/3 of the shaft diameter D1 of the connecting handle 20. In the embodiment, it can be understood that the size of the connecting hole 21 can just accommodate the cutter shaft of the cutter head 10, the higher the attaching degree is, the more tight the installation is, the depth L3 of the connecting hole 21, i.e. the length of the cutter shaft, is usually 1/3 of the overall length L2 of the cutter head 10, so that the area of the connecting part between the cutter head 10 and the connecting handle 20 can be increased, and the connection is more stable; the shaft diameter D1 of the connecting handle 20 is three times of the shaft diameter D2 of the cutter head 10, so that the strength of the connecting handle 20 is ensured, and the phenomenon that the connecting handle is easily broken due to overlong length is avoided.

The side wall of the upper part of the connecting handle 20 is provided with a threaded hole 22 perpendicular to the axis, and the threaded hole 22 penetrates through the side wall of the connecting handle 20 and is communicated with the connecting hole 21. The side wall surface of the fixing pin 30 is processed with external threads, and the external threads of the fixing pin 30 are matched with the internal threads of the threaded hole 22. In this embodiment, in order to facilitate the removal and installation of the tool bit 10, the connection shank 20 is provided with a threaded hole 22, and the surface of the fixing pin 30 is also provided with a matching thread, so that the fixing pin 30 can adjust the fastening degree through rotation, the tool bit 10 is also simpler to remove and install, and the vertical punching is because the processing distance from the outer wall to the connection hole 21 is the shortest, thereby saving the processing cost.

The top surface of the outer end of the fixing pin 30 is provided with an inner hexagonal groove 31. The length of the fixing pin 30 is greater than 1/2 of the axial diameter of the connecting shank 20. In this embodiment, it can be understood that the internal hexagonal groove is suitable for a conventional hexagonal wrench, and is used for screwing and adjusting the fixing pin 30, and the length L4 of the fixing pin 30 is greater than half of the shaft diameter D1 of the connecting shank 20, so that the outer end of the fixing pin 30 can protrude out of the surface of the side wall of the connecting shank 20, and the fixing pin 30 can be screwed more conveniently.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A collapsible drill bit, comprising: a cutter head (10), a connecting handle (20) and a fixing pin (30);

the lower end of the cutter head (10) is inserted into the top end of the connecting handle (20) along the axial direction, and the fixing pin (30) is inserted into the side wall of the connecting handle (20) along the direction vertical to the axial direction and is abutted against the side surface of the cutter head (10);

the length of the connecting handle (20) is three times of the length of the cutter head (10).

2. The detachable drill bit according to claim 1, wherein a connecting hole (21) is formed in the top end of the connecting handle (20) along the axis downward, the diameter of the connecting hole (21) is the same as the diameter of the cutter head (10), and the depth of the connecting hole (21) is 1/3 of the length of the cutter head (10).

3. The detachable drill bit of claim 2, wherein the diameter of the cutting head (10) is 1/3 of the diameter of the connecting shank (20).

4. The detachable drill bit of claim 2, wherein the side wall of the upper portion of the connecting shank (20) is provided with a threaded hole (22) perpendicular to the axis, and the threaded hole (22) penetrates through the side wall of the connecting shank (20) and is communicated with the connecting hole (21).

5. The detachable drill according to claim 4, characterized in that the fixing pin (30) has an external thread on its side wall surface, and the external thread of the fixing pin (30) is matched with the internal thread of the threaded hole (22).

6. The detachable drill bit of claim 4, characterized in that the top surface of the outer end of the fixing pin (30) is provided with an inner hexagonal groove (31).

7. The detachable drill according to claim 4, characterised in that the length of the fixing pin (30) is greater than 1/2 of the shaft diameter of the shank (20).