CN208262018U - A kind of threading knife handle - Google Patents

Abstract

The utility model discloses a kind of threading knife handles, comprising: tapping cutter hub, tapping taper shank, taper shank, two lock screws.Tapping cutter hub includes knife handle and taper shank is slidably connected bar.The utility model is first rotated using knife handle and is exited in withdrawing, then is slidably connected the mode that bar exits screw tap from product by taper shank, is reduced screw tap fracture possibility, is reduced processing cost；The special groove design of bar simultaneously because taper shank is slidably connected, meets the processing in special tapping position and product structure, improves tapping efficiency.

Description

A kind of threading knife handle

Technical field

The utility model relates to machining tool technical field more particularly to a kind of threading knife handles.

Background technique

Threading knife handle is for fixing the device of screw tap on numerically-controlled machine tool, and existing threading knife handle is mainly filled by collet Clamp and clamper main body composition, due to producing biggish change in torque when threading knife handle enters knife and withdrawing, screw tap is easy disconnected It splits, causes screw tap service life short, increase processing cost.Meanwhile because product needs position and the product structure of tapping Limitation causes many times to need replacing the operations such as lengthening tapping to meet processing, tapping inefficiency.

The utility model of publication number CN206622724U provides a kind of threading knife handle comprising: knife handle ontology and with Knife handle Ontology Matching is installed and used in loading the tapping collet chuck and nut of screw tap, which further includes having to match by a pressure cap The telescopic shaft for being installed on knife handle body end is closed, this stretches shaft rear end by the first spring, second spring, washer, screw can stretch The mobile mode of contracting is installed in knife handle ontology, which is provided with a driving groove, and the knife handle inner body wall is arranged There is driving key, which falls into the driving groove；It is external that the telescopic shaft front end stretches out in knife handle sheet, the tapping collet chuck and spiral shell Cap is installed at telescopic shaft front end.When the utility model enters knife and withdrawing, telescopic shaft compression or stretching can neutralize a part of torsion Square variation improves screw tap service life, but not so that screw tap will not be broken when change in torque is excessive again to a certain extent It is able to satisfy processing in special circumstances.

Summary of the invention

In view of the drawbacks of the prior art and Improvement requirement, the utility model provide a kind of threading knife handle, its object is to There is provided it is a kind of can reduce to a greater extent screw tap fracture possibility, and can satisfy under special circumstances no replacement is required lengthen Screw tap also can be carried out the threading knife handle of the requirement of processing.

To achieve the above object, the utility model provides following technical proposals:

A kind of threading knife handle, comprising: tapping cutter hub, which includes knife handle and taper shank is slidably connected bar, the knife handle It is hollow including rotary table and the circumferential helical being connect with rotary table bottom surface, among the rotary table；The taper shank is slidably connected before bar End is screw rod, and rear end is cylindrical body, the cylindrical body be it is hollow, have on curved surface two it is smooth and reverse symmetry recessed Slot；Knife handle and the taper shank bar that is slidably connected screw in circumferential helical by screw rod and connect；Tapping taper shank, the tapping taper shank is embedded in cone Handle is slidably connected inside bar, and there are two symmetrical circular holes on top；Taper shank, the taper shank is inside tapping taper shank；Two lockings Screw, two lock screws respectively from taper shank be slidably connected bar two grooves insertion tapping taper shank top two circular holes It is interior, and be fixed on taper shank by two bearings and be slidably connected bar surface.

Preferably, the tapping taper shank is semi-hollow cylindrical body, and there are two symmetrical annular grooves among the tapping taper shank.

Preferably, the taper shank top is cutting face, and lower part is rotary table, and there are two sections in the cutting face.

Compared with prior art, the utility model is first rotated using knife handle and is exited in withdrawing, then is slidably connected by taper shank The mode that bar exits screw tap from product reduces screw tap fracture possibility, reduces processing cost；Simultaneously because taper shank is sliding The special groove design of dynamic connecting rod, meets the processing in special tapping position and product structure, improves tapping Efficiency.

Detailed description of the invention

Fig. 1 is the perspective view of the utility model；

Fig. 2 is the perspective view of tapping taper shank；

Fig. 3 is the perspective view of taper shank.

Specific embodiment

It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these examples.

Embodiment one

As shown in Figure 1, a kind of threading knife handle, comprising: tapping cutter hub 1, the tapping cutter hub include knife handle 11 and taper shank sliding Connecting rod 12, the knife handle include rotary table 111 and the circumferential helical connecting with rotary table bottom surface 112, are empty among the rotary table The heart；The taper shank 12 front end of bar that is slidably connected is screw rod 121, and rear end is cylindrical body 122, the cylindrical body be it is hollow, it is bent There are two smooth and reverse symmetry grooves 1221,1222 on face；Knife handle 11 and the taper shank bar 12 that is slidably connected pass through screw rod 121 Circumferential helical 112 is screwed in connect；

It since knife handle 11 and taper shank are slidably connected between bar 12 is formed by connecting by a helical structure, it is attacking After the completion of silk, for machine shaft when inverting withdrawing, screw tap is not that reversion is exited at once, but is first rotated and moved back by knife handle 11 Out, etc. after circumferential helicals 112 exit completely, 12 ability of bar that taper shank is slidably connected exits screw tap from product.It is such to move back Knife mode substantially reduces a possibility that screw tap fracture, extends screw tap service life, has saved processing cost.

As shown in Figure 1 and Figure 2, further, further includes: tapping taper shank 2, the tapping taper shank are slidably connected bar embedded in taper shank Inside 12, there are two symmetrical circular holes 21,22 on top；Taper shank 3, the taper shank 3 is inside tapping taper shank 2；Two locking screws Silk 4,5, two lock screws 4,5 are slidably connected from taper shank insertion tapping cone from two grooves 1221,1222 of bar 12 respectively In two circular holes 21,22 on 2 top of handle, and taper shank is fixed on by two bearings and is slidably connected 12 surface of bar.

Tapping taper shank 2 is to be able to be fixed on taper shank by lock screw 4,5 to be slidably connected inside bar 12, since taper shank slides Groove 1221,1222 there are two tools adjusts the tightness of lock screw 4,5, then by turn bearing on 12 curved surface of connecting rod The telescopic moving that tapping taper shank 2 is slidably connected in bar 12 in taper shank may be implemented so as to some special tapping positions or When person's product structure is processed, meets processing without the screw tap by replacement lengthening, substantially increase tapping Efficiency.

As shown in Fig. 2, the tapping taper shank 2 is semi-hollow cylindrical body, there are two symmetrical annulars among the tapping taper shank 2 Groove 23,24.

The core structure in midair of tapping taper shank 2 is embedded in its hollow parts convenient for taper shank 3.

As shown in figure 3,3 top of taper shank is cutting face 31, lower part is rotary table 32, and there are two sections in the cutting face.

In conclusion the utility model passes through the helical structure in newly-increased tapping cutter hub, after the completion of tapping, by knife handle 11 first rotations are exited, and after waiting helicla flutes 112 to exit completely, 12 ability of bar that taper shank is slidably connected exits screw tap from product.This The withdrawing mode of sample substantially reduces a possibility that screw tap fracture, extends screw tap service life, has saved processing cost；Together When, there is smooth and reverse symmetry particular groove 1221,1222 to design on the curved surface that taper shank is slidably connected bar 12, passes through rotation Dynamic bearing adjusts the tightness of lock screw 4,5, then tapping taper shank 2 may be implemented and be slidably connected stretching in bar 12 in taper shank Contracting movement, realizes the telescopic effect of tapping taper shank 2, when being processed to some special tapping positions or product structure, Meet processing without the screw tap by replacement lengthening, substantially increases the efficiency of tapping.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Claims (3)

1. a kind of threading knife handle characterized by comprising

Tapping cutter hub, which includes knife handle and taper shank is slidably connected bar, the knife handle include rotary table and go to the bottom with rotary table The circumferential helical of face connection, rotary table centre are hollow；The taper shank bar front end that is slidably connected is screw rod, and rear end is round Cylinder, the cylindrical body be it is hollow, have two smooth and reverse symmetry grooves on curved surface；Knife handle and the taper shank bar that is slidably connected are logical It crosses screw rod and screws in circumferential helical connection；

Tapping taper shank, the tapping taper shank are slidably connected inside bar embedded in taper shank, and there are two symmetrical circular holes on top；

Taper shank, the taper shank is inside tapping taper shank；

Two lock screws, two lock screws respectively from taper shank be slidably connected bar two grooves be inserted into tapping taper shank top In two circular holes at end, and taper shank is fixed on by two bearings and is slidably connected bar surface.

2. threading knife handle as described in claim 1, it is characterised in that:

The tapping taper shank is semi-hollow cylindrical body, and there are two symmetrical annular grooves among the tapping taper shank.

3. a kind of threading knife handle as described in claim 1, it is characterised in that:

The taper shank top is cutting face, and lower part is rotary table, and there are two sections in the cutting face.