CN2292902Y

CN2292902Y - Electric drill rotary hammering switching device

Info

Publication number: CN2292902Y
Application number: CN 97206359
Authority: CN
Inventors: 陈月
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-01-15
Filing date: 1997-01-15
Publication date: 1998-09-30
Anticipated expiration: 2007-01-15

Abstract

The utility model provides a rotary hammering switching device for an electric drill. The utility model can be arranged on a spindle part of the electric drill, and can provide a function that the spindle jumps in an intermittent mode in the axial direction; the switching device is provided with a fixed part, and the spindle which can selectively move to a hammering position at a normal position in the axial direction; the spindle and the fixed part are respectively provided with a saw tooth part and a clutch mechanism through which the spindle can be kept in the normal state or at the hammering position. When the spindle moves to the hammering position, the two saw tooth parts are engaged, the spindle produces intermittent jump along the rotation of the spindle and thus the hammering function can be realized. Moreover, the utility model can be directly arranged on the existing electric drill to add the hammering function.

Description

The revolution hammering switching device shifter of electric drill

The utility model relates to a kind of portable drill, particularly a kind of rig that has additional percussion action.

On hand electric drill, reach the technology that produces the hammering function, known already, and the electric drill that tradition has the hammering function, wherein in order to switch the switch of hammering function, it is not independent existence, it normally forms the switching mechanism of one with a torsion controlling organization, and this hammering function and be when this electric drill arrives in the multiple different torque value a certain torque value, to start just now, just traditional electric drill is when providing this hammering function, the outputting torsion that only has unique definite value, when not meeting user's demand as this torsion, the user also can't possess the condition of this hammering function, the outputting torsion of random this electric drill of change again.

In addition, form the structure of above-mentioned hammering function, be and this adjustment torsion function and be configured to close inseparable design, be used in the electric drill that other need the hammering function so this hammering function can't be independent.

The purpose of this utility model is the revolution hammering switching device shifter that a kind of electric drill will be provided, it can be installed in does not generally have the electric drill use that can adjust the torsion function, also can be installed in and have torsion and adjust the electric drill of function and use, and have and optionally start the hammering function or close the hammering function.

Utility model is achieved in that the revolution hammering switching device shifter of electric drill establishes a fixture that is fixed in electric drill, and one can be at the main shaft that moves to the hammering position of axial normality regioselectivity, and both have respectively in axially outstanding toward each other sawtooth portion; One in order to limit the clutch that main shaft remains on normality position or hammering position, this clutch establish one can be independently around the gate ring of main axis rotation, one pivot is enclosed within the clutch of main shaft, the shaft core position of gate ring is established a stop part, stop part just can pass for the main shaft loose fit, stop part is established one and is trapezoidal protrusion portion, jut stop part axially on form backstop peak portion and the backstop paddy portion that is positioned at different axial locations, clutch can wear for the main shaft pine, clutch be provided with one can with the interface of backstop peak portion and backstop paddy portion engagement, interface is provided with peak portion and the paddy portion that height rises and falls, be provided with a plurality of key portion at the external peripheral surface of clutch, the inner peripheral surface place of fixture then has donating bond portion and slidably often keeps chimeric keyway, has second spring that is set in main shaft at the axial other end of clutch, one thrust washer and spin.

The utility model controlling organization when the normality position keeps separating with the hammering function, main shaft only provides the stable rotation motion, when rotating gate ring individually, can make electric drill obtain the hammering function, promptly with main axis rotation main shaft being produced axially intermittently beats, and the user not too big strength of needs pushes drill bit to workpiece, can carry out the drilling operation easily, selectively starts or closes the hammering function to reach.Its element is installed in the seat that screws togather of electric drill, so no matter whether electric drill has the torsion guiding mechanism, all can mate the utility model and have the hammering function.

The concrete structure of utility model is provided by following examples and accompanying drawing thereof.

Fig. 1 is the axonometric exploded view of the utility model structure.

Fig. 2 is that the axle of torsion adjustment ring is surveyed schematic diagram among Fig. 1.

Fig. 3 is that the axle of gate ring is surveyed schematic diagram among Fig. 1.

Fig. 4 is the action schematic diagram of torsion guiding mechanism among Fig. 1.

Fig. 5 is the structural representation that the hammering controlling organization does not start the hammering function among Fig. 1.

Fig. 6 is the structural representation that the hammering controlling organization starts the hammering function among Fig. 1.

Fig. 7 is the structural representation that the hammering controlling organization starts back fixture first sawtooth portion and the engagement of the rotating disc second sawtooth portion among Fig. 1.

With reference to Fig. 1, notional line is represented a rifle type body electric drill among the figure, and its epimere is the power output, the installation position of revolution hammering switching device shifter promptly of the present utility model; Be example with electric drill below with torsion guiding mechanism, its enforcement structure is described, but be not limited to the utility model and can only be used for this kind electric drill, as long as electric drill output main shaft can axially be made the structure of a certain degree displacement at it, all can set revolution hammering switching device shifter of the present utility model, and increase the function of a hammering.

Above-mentioned torsion guiding mechanism includes at least: one by electric motor driven driving gear 1, and driving gear 1 is equipped with one at the annular friction dish 10 that radially extends, and frictional disk 10 has a plurality of prominent points 100 towards axial projections; Being provided in electric drill housing 2 can be at axially movable barrier element 20, barrier element 20 keeps contacting with the axial surface of frictional disk 10, when frictional disk 10 rotates synchronously with driving gear 1, barrier element 20 is distributed in a plurality of through holes 21 restriction of the circumferential position of electric drill housing 2, can be at the relative fricting movement of point 100 formations frictional disk 10 having a rest property of rotational time and prominent; One pressure generator is in order to impose axial compression on barrier element 20, pressure generator is by a spring 11, packing ring 12, setting element 13 and torsion adjustment ring 14 are formed, packing ring 12 and setting element 13 lay respectively at spring 11 axial two ends, setting element 13 and torsion adjustment ring 14 keep meshing relation, pad volume 12 contacts with another axial end portion of barrier element 20, torsion adjustment ring 14 as shown in Figure 2, it is a ring that axially runs through, the circumference in equal parts position of side wall surface is equipped with several stepped end differences 140 within it, end difference 140 has a plurality of cascaded surfaces 141 at axial different vertical-depths, setting element 13 is an annulation is set in housing 2 with the relation that can not revolve a non-circular cylinder 22, the circumference uniform distribution of setting element 13 is established protuberance 130, protuberance 130 just can mesh with arbitrary cascaded surface 141, with reference to Fig. 4, when the adjustment of user's rotary torsion encircles 14, but mat setting element 13 and be positioned at the engagement of disalignment to the cascaded surface 141 of vertical-depth, and spring 11 is axially pressed, and then in the axial generation thrust in various degree of barrier element 20, because barrier element 20 is steel balls, it can be when frictional disk 10 rotations, cross prominent point 100, and seek dish 10 to rubbing and impose the suitable anti-resistance that revolves, therefore the random turn torsion adjustment ring 14 of user, and reach the purpose of adjustment electric drill outputting torsion.

Above-mentioned hammering controlling organization includes: a fixed fixture 3, can remain on the clutch of normality position or hammering position at the main shaft that moves to the hammering position 4, of axial normality regioselectivity in order to restriction main shaft 4; Wherein fixture 3 is rings, and mat two screws 32 screw the two outstanding seats 23 that screw togather at cylinder 22, and screw 32 passes the scallop hole 53 of a gate ring 5, simultaneously gate ring 5 and torsion adjustment ring 14 and retaining element 13 etc. is combined in the electric drill front end and unlikelyly deviates from.

Fixture 3 has the first sawtooth portion 30, and main shaft 4 has one and can make the rotating disc 40 of rotation synchronously with main shaft 4, rotating disc 40 also have just can with the second sawtooth portion 41 of the first sawtooth portion, 30 engagements.During normality, the first sawtooth portion 30 does not contact each other with the second sawtooth portion 41, an axial end of main shaft 4 then be provided with one just can with the driven gear 42 of driving gear 1 engagement, the other end then is the hammer installation site that power supply is bored, driven gear 42 at main shaft 4 keeps being engaged under the condition of driving gear 1, still have enough strokes that moves axially,, be movable to the so-called hammering position that the first sawtooth portion, 30 energy and the second sawtooth portion 41 are meshed in order to when using the hammering function.

Clutch includes one can be around the gate ring 5 (as Fig. 3) of main shaft 4 rotations, one is sheathed on the clutch 6 of main shaft 4, wherein the shaft core position of gate ring 5 is established a stop part 50, stop part 50 just can pass with loose fit for main shaft 4, it has one and is step-like jut, in order to stop part 50 axially on form backstop peak portion 51 and the backstop paddy portion 52 that is positioned at different axial locations, and clutch 6 can pass with loose fit for main shaft 4 equally, axially having towards stop part 50 of clutch 6 is outstanding, and be able to the interface 60 of backstop peak portion 51 and backstop paddy portion 52 engagements, interface 60 has peak portion 61 and paddy portion 62 equally, outer round surface at clutch 6 is provided with a plurality of and key portion 64 axially parallel, but slide and often keep chimeric keyway 31 in the inner peripheral surface place of fixture 30 then donating bond portion 64, then establish one at the axial other end of clutch 6 and be sheathed on main shaft 4, and the interface 60 that promotes clutch 6 is normal to keep touching any one second spring 63 of backstop peak portion 51 or backstop paddy portion 52, and by axial-thrust washer 65 and spin 66 formed axial thrust bearings, be screwed on gate ring 5 by a protecgulum 7 at last, can form clutch.

With reference to Fig. 5, when the normality position, backstop peak portion 51 and peak portion 61 are in contact with one another, at this moment, even main shaft 4 axially be subjected to axial compression from drill bit, axially stopping of mat stop part 50 and clutch 6, the second sawtooth portion 41 of main shaft 4 can't reach the hammering position with 30 engagements of the first sawtooth portion, so main shaft 4 can only provide the stable rotation motion; Otherwise, when user's desire is used the hammering function, only need rotate gate ring 5 individually, and make backstop peak portion 51 be engaged in paddy portion 62, shown in the 6th figure, this moment is from the axial compression of drill bit, can promote clutch 6 by main shaft 4, and make the backstop peak portion 51 can entrenched valley portions 62, and the second sawtooth portion 41 also can move axially to the hammering position of touching the first sawtooth portion 30, as shown in Figure 7, so as long as the user continue the surface of the work of drilling is being treated in the drill bit ejection, when main shaft 4 rotates, in two

sawtooth

30,41 with driving fit each other, and with the rotation of main shaft 4 main shaft 4 is beated in the axial intermittence that produces, and produces the hammering function, the user will not need the too big strength of spend that drill bit is pushed to workpiece for this reason, can carry out the drilling operation easily.

Revolution hammering switching device shifter of the present utility model, wherein element is by two screws 32, elements such as gate ring 5, fixture 3, clutch 6, second spring 63 and protecgulum 7 can be installed in electric drill screw togather the seat 23, even so do not have the electric drill of torsion guiding mechanism, screw togather seat 23 and main shaft 4 as long as be provided with, can mate the utility model and have the hammering function.

Claims

1. the revolution hammering switching device shifter of an electric drill comprises main shaft, it is characterized in that:

A. a fixture (3) that is fixed in electric drill, one can be at the main shaft that moves to the hammering position (4) of axial normality regioselectivity, and both have respectively in axially outstanding toward each other sawtooth portion (30,41);

B. one in order to limit the clutch that main shaft (4) remains on normality position or hammering position, this clutch is established a gate ring (5) that can independently rotate around main shaft (4), one pivot is enclosed within the clutch (6) of main shaft (4), the shaft core position of gate ring (5) is established a stop part (50), stop part (50) just can supply main shaft (4) pine to wear, stop part (50) is established one and is trapezoidal jut, jut forms backstop peak portion (51) and the backstop paddy portion (52) that is positioned at different axial locations axially going up of stop part (50), clutch (6) can supply main shaft (4) loose fit to pass, clutch (6) be provided with one can with the interface (60) of backstop peak portion (51) and backstop peak portion (52) engagement, interface (60) is provided with the He Gubu of peak portion (61) (62) that height rises and falls, external peripheral surface at clutch (6) is provided with a plurality of key portions (64), the inner peripheral surface place of fixture (3) has then that donating bond portion (64) is slidably normal to keep chimeric keyway (31), has second spring (63) that is set in main shaft (4) at the axial other end of clutch (6), one thrust washer (65) and spin (66).

2. the revolution hammering switching device shifter of electric drill according to claim 1 is characterized in that having one and screwing togather seat (23) electric drill to second, is screwing togather seat (23) because of deciding part (3) so that screw (32) spiral shell is solid.

3. the revolution hammering switching device shifter of electric drill according to claim 1, it is characterized in that main shaft (4) is provided with one and can makes the rotating disc (40) of rotation synchronously with main shaft (4), rotating disc (40) also have just can with first the second sawtooth portion (41) on the fixture (3) to sawtooth portion (30) engagement.