CN2098341U

CN2098341U - Device for turning electric drill into percussion one

Info

Publication number: CN2098341U
Application number: CN 91208768
Authority: CN
Inventors: 庄建龙
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-05-20
Filing date: 1991-05-20
Publication date: 1992-03-11

Abstract

The utility model discloses an additional device for turning an electric drill into a percussion one, which is mainly characterized in that the end surface is provided with a percussion gear with inclined teeth and a stationary gear, to generate percussion in the time of rotating, to cause the drill bit perform the composite motion of rotating with percussion. The apparatus is arranged on the drill bit chuck of the electric drill, used for making the electric drill generate the percussion effect.

Description

Device for turning electric drill into percussion one

The utility model relates to a kind of attachment device of electric tool, specifically, is a kind of attachment device that can make electric drill have impact function.

The electric drill that existing people use, be mainly used in the boring of materials such as metal, plastics, timber, owing to do not possess percussion, its scope of application is restricted, be not suitable on buildings such as concrete, masonry, punchinging or slotting, and the operation that the user often needs to punch under these two kinds of different occasions and so on, so though electric drill is arranged, but, feel inconvenience very much because of accomplishing one-object-many-purposes.And existing electric impact drill, though the scope of application is bigger, both applicable to materials such as metal, timber, again applicable to buildings such as concrete, masonries, but because its structure is integrated, have that volume is big, the shortcoming of Heavy Weight, equally also make troubles, especially under the situation that is being applicable to materials borings such as metal, timber to people, this problem is more apparent outstanding, in addition, when its a certain parts damages, this electric impact drill just can not re-use.

The purpose of this utility model is to overcome above-mentioned deficiency and a kind of attachment device that makes electric drill have impact function is provided.In normal circumstances, electric drill is pressed usual way and is used, and when needs impact, as long as load onto this attachment device, just then electric drill can be punchinged or slot on buildings such as concrete, fragment of brick.

Its objective is such realization: this device comprises a drill chuck, be used for clamping one drill bit; One impacts gear, and its helical teeth is distributed on the end face of an end, and this impact gear is fixed in the bottom of above-mentioned drill chuck, and its end face that tooth arranged down; One power transmission shaft is taken turns the formation key connecting with above-mentioned impact teeth, is used for driving and impacts the gear rotation, and the impact gear can be moved axially relatively; Overlap in one, be placed in the side of above-mentioned impact gear, form relatively-movable the contact with this impact teeth wheel; One fixed gear, its helical teeth also is distributed in the end face of an end, it passes above-mentioned power transmission shaft, and be fixed in above-mentioned in the cover, its end face that tooth arranged up, to have the end face of tooth to form relative with above-mentioned impact gear; One rolling bearing is positioned at the said fixing gear, and is placed on the above-mentioned power transmission shaft, is used for supporting drive shaft.Like this, when power transmission shaft rotates, it will rotate by impacting the gear driven drill chuck, and at this moment drill chuck will be compressed if be subjected to obstacle, make and impact gear and fixed gear generation mesh impact.If this device is loaded on the electric drill, promptly above-mentioned power transmission shaft is by the drill jig clamping of electric drill, just then this electric drill can produce percussion by this device.

Use device of the present utility model, can make electric drill on traditional simple function, increase percussion, enlarged its scope of application, simultaneously, be additional structure owing to what adopt, when the parts that produce the percussion part damage, as long as pull down this device, electric drill still can be brought into play original function, in addition, and for the boring that only needs general situation, but need not to produce when impacting, this device can unload, and to reduce weight and volume, reaches the labour-saving purpose.

Fig. 1 is a kind of concrete structure figure of the utility model;

Fig. 2 is the fixed gear structural representation of Fig. 1;

Fig. 3 is the impact teeth wheel construction schematic diagram of Fig. 1;

Fig. 4 is the another kind of concrete structure figure of the utility model;

Fig. 5 is the transmission shaft structure schematic diagram of Fig. 4;

Fig. 6 is that Fig. 5 is along A-A line profile;

Fig. 7 is the impact teeth wheel construction schematic diagram of Fig. 4;

Fig. 8 is that Fig. 7 is along B-B line cutaway view.

The utility model is described in further detail below in conjunction with accompanying drawing:

Embodiment one: with reference to Fig. 1, Fig. 2, attachment device shown in Figure 3, be distributed with some helical teeth on the end face of impact gear 11 1 ends, this impact gear 11 and drill chuck 15 are fixed together by thread connection, end at power transmission shaft 3 has keyway, it forms key connecting with the key that impacts gear 11, rivet 14 is used to limit the amplitude of impacting gear and power transmission shaft relative motion, interior cover 8 will impact gear 11 and be placed in it, and by steel ball 10 and relatively-movable good contact of impact teeth wheel formation, also be distributed with on the end face of fixed gear 7 one ends if a helical teeth, this fixed gear 7 passes power transmission shaft 3 by the perforate on it, and by holding screw 5 be fixed in the cover 8 in, rolling bearing 6 is placed on the power transmission shaft 3, with the medial surface formation excellent contact of fixed gear 7, and by the tumbler on shaft shoulder bolster on the power transmission shaft 3 and the axle.Like this, have relatively-movable the contact owing to impact gear 11 with interior cover 8, impacting gear 11 decapacitation rotates with power transmission shaft 3, can also move with respect to power transmission shaft, reach and impact gear 11 the constantly mesh impact with the obstruction that is subjected to the outside of the end face of tooth and end face that fixed gear 7 has tooth is arranged, thus the generation percussion.Overcoat 2 is fixed on the shell of interior cover 8 outer surfaces of this device and electric drill by screw; the combination that electric drill is installed therewith is more firm and compact; dirt-proof boot 13 is placed between drill chuck 15 and the overcoat 2; can play and prevent that dust or sandy soil from entering the effect that in the interior cover parts is worn; in addition; on overcoat 2, can also load onto gag lever post 4, be used to control the degree of depth of institute's perforate.

Embodiment two: with reference to Fig. 4,5,6,7,8, this embodiment and embodiment one are basic identical, institute's difference, i.e. power transmission shaft and the key connecting of impacting gear, can realize and form second keyway 17 by on power transmission shaft, forming second key 16 at the impact teeth wheel.

Claims

1, a kind of electric drill becomes the device of electric impact drill, it is characterized in that it comprises:

One drill chuck is used for clamping one drill bit;

One impacts gear, and its helical teeth is distributed on the end face of an end, and this impact gear is fixed in the bottom of above-mentioned drill chuck, and its end face that tooth arranged down;

One power transmission shaft forms key connecting with above-mentioned impact teeth wheel;

Overlap in one, be placed in the side of above-mentioned impact gear, form relatively-movable the contact with this impact teeth wheel;

One fixed gear, its helical teeth also is distributed in the end face of an end, it passes above-mentioned power transmission shaft, and be fixed in above-mentioned in the cover, its end face that tooth arranged up, to have the end face of tooth to form relative with above-mentioned impact gear;

One rolling bearing is placed on the above-mentioned power transmission shaft, and is positioned at the said fixing gear, is used to support this power transmission shaft;

When above-mentioned power transmission shaft rotates, if above-mentioned drill bit is executed under the effect of axial force outside, above-mentioned impact gear and said fixing gear will produce mesh impact, make drill bit make the compound motion that rotating band impacts.

2, device according to claim 1 is characterized in that putting in above-mentioned, also is with an overcoat, is used to make electric drill more firm with combining of device.

3, device according to claim 2 is characterized in that above-mentioned outer putting a gag lever post being housed also.