CN208341828U

CN208341828U - A kind of counterbit

Info

Publication number: CN208341828U
Application number: CN201820677883.3U
Authority: CN
Inventors: 麦仲文
Original assignee: Honda Metal Technology (foshan) Co Ltd
Current assignee: Honda Metal Technology (foshan) Co Ltd
Priority date: 2018-05-08
Filing date: 2018-05-08
Publication date: 2019-01-08
Anticipated expiration: 2028-05-08

Abstract

The utility model discloses a kind of counterbit, the counterbit includes knife handle and drill bit, and one end of knife handle is provided in the axial direction with a blind hole, which is coaxially disposed with knife handle；In the shank insertion blind hole of the drill bit, the shank of drill bit offers at least one first threaded hole, the side wall of blind hole corresponds to and offers first through hole at each first threaded hole respectively, is inserted into a screw at each first through hole respectively and is screwed into corresponding first threaded hole；The blade that one end of blind hole is detachably provided with two for spot facing is corresponded on knife handle, the angle of two blades is 180 degree.It in counterbit provided by the utility model, is connected by screw between drill bit and knife handle, it is replaced with can be convenient, without replacing entire counterbit, so that knife handle is reused, avoid waste.

Description

A kind of counterbit

Technical field

The utility model relates to technical field of mechanical processing, in particular to a kind of counterbit.

Background technique

Counterbit is used to carry out drilling and ream face simultaneously to workpiece, saves process.In the prior art, the drill bit and knife of counterbit Handle is fixedly connected, although having certain stability, after a period of use, drill bit inherently gradually wears out or even turned round It is disconnected, integral replacing is needed so as to cause entire counterbit, causes to waste.It is therefore desirable to propose a kind of counterbit, both it had been able to achieve simultaneously Drilling and ream face, also can easily more bit change so that knife handle is reused.

As it can be seen that the prior art could be improved and improve.

Utility model content

Place in view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of counterbits, it is intended to solve The technical problem of counterbit more bit change inconvenience in the prior art.

In order to achieve the above object, the utility model takes following technical scheme:

A kind of counterbit, including knife handle and drill bit, one end of knife handle are provided in the axial direction with a blind hole, and the blind hole and knife handle are same Axis it is arranged；In the shank insertion blind hole of the drill bit, the shank of drill bit offers at least one first threaded hole, the side of blind hole Wall corresponds to and offers first through hole at each first threaded hole respectively, is inserted into a screw at each first through hole respectively and is screwed into In corresponding first threaded hole；The blade that one end of blind hole is detachably provided with two for spot facing is corresponded on knife handle, The angle of two blades is 180 degree.

First threaded hole there are two opening up altogether in the counterbit, on the shank of drill bit, two the first threaded holes are coaxially Setting；The side wall of blind hole is accordingly opened up there are two first through hole.

In the counterbit, each blade offers second through-hole respectively, and it is logical that the end of knife handle corresponds to each second Second threaded hole is offered at hole respectively, be inserted into a screw in each second through-hole respectively and is screwed into corresponding second spiral shell In pit.

In the counterbit, knife handle outer wall corresponds to offers a chip space respectively at each blade.

In the counterbit, the drill bit is fluted drill.

The utility model has the advantages that

The utility model provides a kind of counterbit, compared with prior art, in counterbit provided by the utility model, drill bit and knife It is to be detachably connected between handle, even if drill bit gradually wears out or even twists off in the course of work, it is replaced with can be convenient, Without replacing entire counterbit, so that knife handle is reused, waste is avoided.

Detailed description of the invention

Fig. 1 is the main view of counterbit provided by the utility model.

Fig. 2 is the partial enlarged view in the region S in Fig. 1.

Fig. 3 is counterbit provided by the utility model, the structural schematic diagram of drill bit.

Specific embodiment

The utility model provides a kind of counterbit, to keep the purpose of this utility model, technical solution and effect clearer, bright Really, the utility model is further described as follows in conjunction with drawings and embodiments.It should be appreciated that described herein specific Embodiment only to explain the utility model, is not used to limit the utility model.

It please refers to Fig.1 to Fig.3, the utility model provides a kind of counterbit.

The counterbit includes knife handle 1 and drill bit 2, and one end of knife handle 1 is provided in the axial direction with a blind hole 101, the blind hole 101 are coaxially disposed with knife handle 1；The shank 21 of the drill bit 2 is inserted into blind hole 101, and the shank of drill bit offers at least one First threaded hole 210, the side wall of blind hole correspond to and offer first through hole (not shown) respectively at each first threaded hole, often A screw 61 is inserted at a first through hole respectively and is screwed into corresponding first threaded hole 210；That of blind hole is corresponded on knife handle 1 One end is detachably provided with two blades 3 for spot facing, and the angle of two blades 3 is 180 degree, as shown in Fig. 2, two Blade is oppositely arranged.In practical application, the shank of drill bit is cylindrical, and blind hole is circular hole, and the shank of drill bit is with clearance fit Mode is inserted into blind hole.The blade 31 of blade 3 is located on a rib of following table, for carrying out ream face to workpiece.

Preferably, it is opened up altogether on the shank of drill bit there are two the first threaded hole 210, two the first threaded holes are coaxially set It sets；Correspondingly, the side wall of blind hole is accordingly opened up there are two first through hole.Only observe first threaded hole in the visual angle of Fig. 3 210, another threaded hole be located at the overleaf observing of drill handle part less than.By the way that two threaded holes are arranged, connected when using screw Afterwards drill bit can function more stably connect with knife handle.

In actual use, the end of blade and knife handle may be set to be detachably connected, specifically, as shown in Fig. 2, Each blade 3 offers second through-hole (at corresponding screw 62) respectively, and the end of knife handle 1 corresponds to each second through-hole punishment It does not offer second threaded hole (corresponding screw 62 at), be inserted into a screw 62 in each second through-hole respectively and be screwed into pair In the second threaded hole answered.As shown in Figure 2, the second through-hole is counterbore, and after screw-driving, the head of screw will not exceed downwards knife The lower surface of piece, that is, screw does not influence normal ream face.

Further, knife handle outer wall corresponds to offers a chip space 109 respectively at each blade.It only sees at the visual angle of Fig. 2 Observe a chip space.By the way that chip space is arranged, even if convenient for the bits slag cut to be discharged to the matter to guarantee ream face when ream face Amount.

Preferably, the drill bit 2 is fluted drill, and structure is simple, and interchangeability is high.

By above-mentioned analysis it is found that counterbit provided by the invention has the advantages that (1) is removable between drill bit and knife handle Connection is unloaded, even if drill bit gradually wears out or even twists off in the course of work, it is replaced with can be convenient, without will be whole A counterbit replacement, so that knife handle is reused, avoids waste.(2) further, by blade and knife handle also by screw Connection, is conveniently replaceable blade, and screw does not influence normal ream face.

It is understood that for those of ordinary skills, can with technical solution according to the present utility model and The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement all should belong to the protection of the utility model Range.

Claims

1. a kind of counterbit, including knife handle and drill bit, which is characterized in that one end of knife handle is provided in the axial direction with a blind hole, this is blind Hole is coaxially disposed with knife handle；In the shank insertion blind hole of the drill bit, the shank of drill bit offers at least one first screw thread Hole, the side wall of blind hole corresponds to offers first through hole respectively at each first threaded hole, is inserted into one respectively at each first through hole A screw is simultaneously screwed into corresponding first threaded hole；That one end that blind hole is corresponded on knife handle is detachably provided with two for ream The blade of plane, the angle of two blades are 180 degree.

2. counterbit according to claim 1, which is characterized in that it is opened up altogether on the shank of drill bit there are two the first threaded hole, Two the first threaded holes are coaxially disposed；The side wall of blind hole is accordingly opened up there are two first through hole.

3. counterbit according to claim 2, which is characterized in that each blade offers second through-hole, knife handle respectively End correspond to each second through hole and offer second threaded hole respectively, a spiral shell is inserted into each second through-hole respectively It follows closely and is screwed into corresponding second threaded hole.

4. counterbit according to claim 3, which is characterized in that knife handle outer wall corresponds to offers one respectively at each blade Chip space.

5. counterbit according to claim 4, which is characterized in that the drill bit is fluted drill.