CN210877719U

CN210877719U - Detachable drill bit

Info

Publication number: CN210877719U
Application number: CN201921834918.0U
Authority: CN
Inventors: 朱俊庆
Original assignee: Zhenjiang Zhengda Tools Co ltd
Current assignee: Zhenjiang Zhengda Tools Co ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-06-30
Anticipated expiration: 2029-10-29

Abstract

The utility model discloses a detachable drill bit, which relates to the technical field of drill bits, and comprises a handle, a cutter bar and a cutter head, wherein the cutter head is fixedly connected with the cutter bar, the inside of the handle is provided with a groove with an open end, the side wall of the groove extends into the handle and is provided with an embedded groove, one end of the cutter bar is inserted into the groove, the outer surface of the cutter bar is fixedly provided with a positioning block, the size of the positioning block is the same as that of the embedded groove, the side wall of the handle is provided with a threaded hole communicated with the groove, and the cutter bar is provided with screw holes with the same specification; meanwhile, the positioning block and the embedded groove are matched, so that the accuracy of the cutter bar when the cutter bar is inserted into the cutter handle can be realized, the cutter bar can be prevented from rotating in the drilling process, and the normal operation of drilling work is ensured.

Description

Detachable drill bit

Technical Field

The utility model relates to a drill bit technical field, in particular to can dismantle drill bit.

Background

The drill bit is a tool for drilling through holes or blind holes in solid materials and reaming the existing holes, and the commonly used drill bits mainly comprise a twist drill, a flat drill, a center drill, a deep hole drill and a trepanning drill; the existing drill bit is generally made of hard alloy, the working part and the handle part of the drill bit are of an integral structure, the working part of the drill bit is easy to wear during drilling and needs to be frequently replaced, and the working part and the handle part are of an integral structure, so that the whole drill bit can be replaced only when the working part of the drill bit needs to be replaced due to wear, materials are greatly wasted, and the cost of the drill bit is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can dismantle drill bit for solve the technical problem that above-mentioned background art exists.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a detachable drill bit, includes the handle of a knife, cutter arbor and tool bit, the inside of handle of a knife has a tip open-ended recess, and the lateral wall of recess extends to the inside of handle of a knife has one to inlay the groove, the one end of cutter arbor is pegged graft in the recess, and the external fixed surface of cutter arbor is provided with a locating piece, the size of locating piece is the same with the size that inlays the groove, the screw hole of intercommunication recess is seted up to the lateral wall of handle of a knife, sets up the screw of the same specification on the cutter arbor, when the locating piece inserts the inlay inslot completely, screw hole on the.

Preferably, the locating piece and the cutter arbor integrated into one piece, the length of locating piece is less than the length of cutter arbor, and wherein one end of locating piece and the one end laminating that the cutter arbor is close to the handle of a knife.

Preferably, the cutter head comprises a plurality of spiral cutting edges, a cutter point is formed at one end, far away from the cutter rod, of each cutting edge, an embedded hole groove is formed between every two cutting edges, and an inclined chamfer is formed between one end, far away from the cutter point, of the lowest cutting edge and the embedded hole groove.

Preferably, the tool nose is provided with a chip removal groove for removing chips in the direction away from the tool nose, and the chip removal groove and the hole embedding groove are in the same spiral shape.

Preferably, the bottom of the hole-embedding groove forms a sharp edge used for removing burrs between the axial direction of the blade spiral and the chip groove.

Preferably, the sharp edge and the cutting edge are in the same spiral shape, and one end of the sharp edge far away from the tool nose is fixed with the tool bar in a welding mode.

The utility model has the advantages as follows: the utility model relates to a detachable drill bit, which realizes detachable connection between a cutter bar and a cutter handle through screw fixation, thereby being capable of replacing when the cutter head is damaged or worn, and avoiding resource waste; meanwhile, the positioning block and the embedded groove are matched, so that the accuracy of the cutter bar when the cutter bar is inserted into the cutter handle can be realized, the cutter bar can be prevented from rotating in the drilling process, and the normal operation of drilling work is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

With reference to fig. 1, the technical purpose of the present invention is achieved by the following technical solutions: a detachable drill bit comprises a cutter handle 1, a cutter rod 2 and a cutter head 3, wherein a groove 11 with an opening at one end part is formed in the cutter handle 1, an embedded groove 12 extends from the side wall of the groove 11 to the interior of the cutter handle 1, one end of the cutter bar 2 is inserted in the groove 11, a positioning block 4 is fixedly arranged on the outer surface of the cutter bar 2, the size of the positioning block 4 is the same as that of the embedded groove 12, the side wall of the knife handle 1 is provided with a threaded hole 13 communicated with the groove 11, the knife bar 2 is provided with threaded holes with the same specification, when the positioning block 4 is completely inserted into the embedding groove 12, the threaded hole 13 on the cutter handle 1 is superposed with the threaded hole on the cutter rod 2, the detachable drill bit of the utility model realizes the detachable connection between the cutter rod 2 and the cutter handle 1 through the fixation of the screw, thereby the cutter head 3 can be replaced when damaged or worn, and the waste of resources is avoided; meanwhile, the matching of the positioning block 4 and the embedded groove 12 not only can realize the accuracy of the cutter bar 2 when being inserted into the cutter handle 1, but also can prevent the cutter bar 2 from rotating in the drilling process, thereby ensuring the normal operation of drilling.

Preferably, the locating block 4 and the cutter arbor 2 integrated into one piece, the length of locating block 4 is less than the length of cutter arbor 2, and wherein one end of locating block 4 and the one end laminating that the cutter arbor 2 is close to handle of a knife 1, among this technical scheme, when the cutter arbor 2 just inserted inside recess 11, locating block 4 just can insert in the inlay groove 12, has avoided the cutter arbor 2 still need rotate cutter arbor 2 after inserting so that the condition of locating block 4 insertion in inlay groove 12 takes place, has reduced the operating load.

Preferably, the tool bit 3 includes a plurality of helical cutting edges 31, a cutting edge 32 is formed at one end of each cutting edge 31 far away from the tool holder 2, an embedded hole groove 33 is formed between every two cutting edges 31, and an inclined chamfer 34 is formed between one end of the lowermost cutting edge 31 far away from the cutting edge 32 and the embedded hole groove 33.

Preferably, chip groove 35 that is used for the chip removal is offered to the direction of keeping away from knife tip 32 to knife tip 32, chip groove 35 is the same heliciform with inlay hole groove 33, and chip groove 35's setting can reduce in the drilling because of the sweeps piles up on cutting edge 31 and influence the quality condition emergence of drilling the hole, improves the efficiency of drilling, guarantees the normal clear of drilling.

Preferably, a sharp edge 36 for removing burrs is formed between the bottom of the hole embedding groove 33 and the chip groove 35 along the axial direction of the helix of the cutting edge 31, and the sharp edge 36 is arranged to perform deburring treatment on the inner wall of the hole, so that the quality of the hole wall and the hole opening of the drilled hole is improved.

Preferably, the sharp edge 36 and the cutting edge 31 are in the same spiral shape, and one end of the sharp edge 36 away from the cutting tip 32 is fixed with the tool bar 2 by welding.

The above description specifically describes the preferred embodiment of the present invention, but of course, the present invention can also adopt different forms from the above embodiments, and equivalent changes or corresponding modifications made by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. The utility model provides a can dismantle drill bit, includes handle of a knife, cutter arbor and tool bit, tool bit and cutter arbor fixed connection, its characterized in that: the utility model discloses a handle of a knife, including handle of a knife, recess, locating piece, threaded hole, screw hole on the handle of a knife, the inside of handle of a knife has an end open-ended recess, and the lateral wall of recess extends to the inside of handle of a knife has one to inlay the groove, the one end of cutter arbor is pegged graft in the recess, and the fixed surface of cutter arbor is provided with a locating piece, the size of locating piece is the same with the size that inlays the groove, the threaded hole of intercommunication recess is seted up to the.

2. A detachable drill according to claim 1, characterised in that: the locating piece and the cutter arbor integrated into one piece, the length of locating piece is less than the length of cutter arbor, and wherein one end of locating piece and the one end laminating that the cutter arbor is close to the handle of a knife.

3. A detachable drill according to claim 2, characterized in that: the tool bit comprises a plurality of spiral cutting edges, a tool nose is formed at one end, far away from the tool bar, of each cutting edge, an embedded hole groove is formed between every two cutting edges, and an inclined chamfer is formed between one end, far away from the tool nose, of the lowest cutting edge and the embedded hole groove.

4. A detachable drill according to claim 3, characterised in that: the tool nose is provided with a chip removal groove for removing chips in the direction far away from the tool nose, and the chip removal groove and the embedded hole groove are in the same spiral shape.

5. A detachable drill according to claim 4, characterized in that: and a sharp edge for removing burrs is formed between the bottom of the embedded hole groove and the chip groove along the axial direction of the blade spiral.

6. A detachable drill according to claim 5, characterised in that: the sharp edge and the cutting edge are in the same spiral shape, and one end of the sharp edge, far away from the tool nose, is fixed with the tool bar in a clamping or welding mode.