CN2239852Y - Hand drill - Google Patents

Abstract

The utility model relates to a hand core drill which is used for drilling members at the time of installation of engineering pipelines and is also used for drilling a rock, marble, and a brick wall. The utility model mainly solves the defects that the drilling range of a percussion drill is small, a steel reinforcement is not drilled by the percussion drill, the noise of the percussion drill is large, the speed of the percussion drill is slow, etc. The utility model is characterized in that an original movable motor and a hand drill are separated, and a steel ball clutch which is arranged in a housing is used as a torque transmission and overload protecting device.

Description

Portable cylindrical drill

The utility model belongs to engineering pipeline the boring field is installed, and also can hole to rock, marble, geology sample piece.

The percussion drill of engineering the drilling extensive use now, but because its bore size scope is little, can not the drill steel muscle, noise is big slow with penetration rate, and often burns out motor, the engineering the drilling of exhausted major part, it all can't be finished.

Therefore the purpose of this utility model is: design a kind of long-lived hand-held jacking rig, thereby the moment of torsion expansion bore diameter scope of promptly wanting to eliminate or producing during balancing drilling reduces the weight of hand-held drill again as far as possible, is convenient to the light operation of 1 people.

The purpose of this utility model is achieved in that this portable cylindrical drill reaches hand-held handgrip by motor, flexible axle bevel-gear sett, steel ball clutch, main shaft, housing, drill bit and forms.Motor output shaft is that slide key connects with flexible axle one end; purpose is to guarantee that flexible axle is because of rotating speed, the different elongations and unlikely strong the beating of urgency of causing flexible axle of shortening of load; the end in addition of flexible axle and conelet tooth afterbody are for being fixedly connected; the auger tooth dallies on main shaft; steel ball clutch main body and main shaft are key connecting; the joint element of auger tooth and steel ball clutch engagement and drive main shaft during duty, when the work overload both joint elements separately, the main shaft realization overload protection that stops operating.The housing front end introduce cooling water pipe to drill bit play cooling with towards the bits effect.The technical characterictic of said structure is: motor separates with hand-held casing; during work motor is placed ground; and link to each other with hand-held casing with flexible axle; this has just guaranteed to have cushioned with balance the moment of torsion that is produced when holing with flexible axle, motor; having reached again and alleviate hand-held weight, secondly is to have adopted the different clutch of steel as overload protection arrangement.

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

Fig. 1 is the utility model fundamental diagram, monophase machine (1) adopts sliding connector (2) to be connected with flexible axle (3) one ends, the other end adopts the device (4) that is fixedly connected to be connected with bevel pinion (7), bevel pinion (7) is loaded among the angular contact ball bearing (5,6), the bevel gear wheel that is meshed with it (8) then dallies on main shaft (11), the main body of steel ball clutch (9) is connected with key and main shaft (11), venerating like this has when steel ball is jumped in the corresponding nest hole, and main shaft (11) can turn round.Whole main shaft (11) is loaded among the angular contact ball bearing (12,13), the front end of casing (10) is introduced cooling water pipe (14) and its switch (15), the front end of main shaft (11) is equipped with cooling jacket (16), open switch (15) afterwards when this has just guaranteed the work of this machine, cooling water is just directly sent in drill bit (17) hollow hole by water jacket (16) and is sent forth around it.Pressing microswitch (18) afterwards, hand-held handle (19) is sent to toward drilled workpiece can be rapidly to Workpiece boring.All adopt aluminium alloy casting in order further to alleviate hand-held weight, casing, water jacket, handle is then injection molded.

Claims (3)

1, a kind of portable cylindrical drill of member being holed for the installing engineering pipeline, this machine is by monophase machine (1), sliding connector (2), flexible axle (3), fixed engagement device (4), bevel-gear sett (7,8), steel ball clutch (9), casing (10), main shaft (11), flow pipe (14), switch (15), water jacket (16) and treapanning drill (17) are assembled successively, handle (19) and microswitch (18) are equipped with in the rear portion of casing (10), it is characterized in that: motor (1) separates with casing (10), motor (1) places ground, handle (19) during boring on the hand-held casing (10), between the two with flexible axle (3) as power transmission shaft.

2, portable cylindrical drill according to claim 1 is characterized in that: flexible axle (3) connects for to be slidingly connected with motor output shaft: its in addition the afterbody of end and bevel pinion (7) for being fixedly connected.

3, portable cylindrical drill according to claim 1, it is held to levy and is: bevel gear wheel (8) dallies on main shaft, and steel ball clutch (9) is a key connecting with main shaft, is pressed into by steel ball and forms moment of torsion transmission and overload protecting mechanism in its corresponding nest hole.

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