CN2606661Y

CN2606661Y - Function changeover device for electric tool

Info

Publication number: CN2606661Y
Application number: CN 03238806
Authority: CN
Inventors: 吴建俊; 徐宏铭; 邓正宜
Original assignee: CHEWANG ELECTRONIC Co Ltd
Current assignee: CHEWANG ELECTRONIC Co Ltd
Priority date: 2003-03-05
Filing date: 2003-03-05
Publication date: 2004-03-17
Anticipated expiration: 2013-03-05

Abstract

The utility model discloses a function changeover device for electric tool which comprises a ratchet wheel unit arranged between a base and a shell of the electric tool as well as a switch unit. The ratchet wheel unit is provided with a locating ratchet wheel fixed on an output shaft, a clutch ratchet wheel which is covered on the base and can have a linear displacement inside the shell as well as a driven ratchet wheel arranged between the locating ratchet wheel and the clutch ratchet wheel; the switch unit is provided with a driving part which is covered on the base and contacts the clutch ratchet wheel as well as a control loop which is covered on the shell and can drive the driving part to have a displacement. The output form of the output shaft can be switched by rotating the control loop to make the clutch ratchet wheel mesh or disengage with the driven ratchet wheel.

Description

The function change-over device of electric tool

(1) technical field

The utility model relates to a kind of electric tool, particularly relates to a kind of function change-over device that can switch the electric tool of output shaft output form fast.

(2) background technology

As Fig. 1, shown in 2, existing a kind of electric tool has the function of use that can hole and rotate spiral lock, device has a motor (not shown) in the one rifle shape housing 101 of this electric tool 10, one gear mechanism 12 by this motor transmission, one torsion ring seat 13 by these gear mechanism 12 transmissions, one lock is tied in the shell body 14 of a casing 121 of this gear mechanism 12, the pedestal 15 of one device in this shell body 14, one is located in the output shaft 16 in this shell body 14, one is installed in the hammer mechanism 17 in this shell body 14, one is installed in the switch unit 18 between this hammer mechanism 17 and this shell body 14, and a torsion regulation unit 19 that is installed between this shell body 14 and this torsion ring seat 13.

This torsion ring seat 13 is to be installed in this outer case 121, has a fort shape anchor ring 131 that is formed with a plurality of projections.

This shell body 14 has that a lock is tied lock-combining part 141 in this casing 121, the body 142 and that extends vertically of this lock-combining part 141 is brought the spiro-locking section 143 of extension together vertically from this body 142 certainly.

This pedestal 15 has a body 151 and of setting that is embedded in this body 142 and sets the sleeve column 152 that body 151 extends vertically from this.

This output shaft 16 is to be located in this shell body 14 and this pedestal 15, can be installed in bearings 161 and in this spiro-locking section 143 by one and be installed in these linings 162 of setting in the body 151 and obtain the location.Normally tie a hammer 163 with clamping one tool heads (not shown, as to can be drill bit or screwdriver head) in external section group of this output shaft 16.

This hammer mechanism 17 has one and overlaps the fixed ratchet wheel 172 that the rotation ratchet 171 and that is fixed in this output shaft 16 is sheathed on this output shaft 16.The opposite face of this rotation ratchet 171 and this fixed ratchet wheel 172 and be provided with can intermeshing hook tooth 173,174, the ring side face of this fixed ratchet wheel 172 and bottom surface form several projections 175, this projection 175 is inserted the slide rail of these shell body 14 inner faces, and this fixed ratchet wheel 172 can only linear displacement can't be rotated.

This switch unit 18 has a collar 181 that is sheathed on this sleeve column 152, and moves piece 182, from pulling of radially extending of this collar 181 and be arranged at this body 142 and make this pull a plurality of grooves 184, the projection 185 that moves the perforation 183 that piece 182 passed and be arranged on this collar 181 and the opposite face of this fixed ratchet wheel 172.

This torsion regulation unit 19 has a spiral shell and is located at support ring 192 and device several springs 193, several balls 194 between this support ring 192 and this shell body 14, pedestal 15 that the adjustment ring 191, of this spiro-locking section 143 is sheathed on this spiro-locking section 143.This ball 194 is that the elastic force by this spring 193 is pressed on this fort shape anchor ring 131.

For easy to operate, have a cap bag 195 at this adjustment ring 191 outsides cover, this cap bag 195 and simultaneously the group knot this pull and move piece 182, when rotating this cap bag 195, can drive these adjustments ring 191 generation linear displacements and change this support ring 192 and this fort shape anchor ring 131 between distance, and then can change the pressure that this ball 194 bestows this torsion ring seat 13 and put power, reach the effect of these output shaft 16 outputting torsions of modulation eventually.

When rotate this cap bag 195 make this pull move piece 182 rotate and make groove 184, when projection 185 is fastening state, then this fixed ratchet wheel 172 is in contactless state with this rotation ratchet 171, and this output shaft 16 can only rotate and be in non-hammer active state (or claiming non-impact conditions) relatively; Drive this and pull and move part 182 and rotate and make this groove 184 when rotating this cap bag 195 again, when projection 185 breaks away from, then can promote this fixed ratchet wheel 172 towards these rotation ratchet 171 displacements, install when driving this rotation ratchet 171 towards these fixed ratchet wheel 172 displacements when this tool heads like this in a workpiece (not shown), this hook tooth 173,174 just can be meshing with each other, relend by this rotation ratchet 171 and can not rotate with these output shaft 16 rotations and this fixed ratchet wheel 172, then can be by this hook tooth 173,174 engagements constantly make this output shaft 16 produce linear reciprocal movements, and then can produce hammer effect (hammer) and can make things convenient for bore operation.

Though having, this electric tool 10 can produce hammer effect and the function of use of only rotating, no matter but because be the switching operation of this function of use, or the adjustment operation of these output shaft 16 outputting torsions, all be to finish, so exist the operator to be difficult for debating knowledge, easy disappearance of giving birth to the operation puzzlement by rotating this cap bag 195.

(3) utility model content

Main purpose of the present utility model is to provide a kind of operator's easy identification, operation, the function change-over device of the electric tool that ease of use is good.

Function change-over device of the present utility model is to be installed on the electric tool, this electric tool has a motor, to be subjected to the gear mechanism, one group of this motor transmission to tie shell body, the pedestal, of a device in this shell body in this gear mechanism to be installed in the output shaft that bearing and in this shell body is arranged in this bearing and is subjected to this gear mechanism transmission, this function change-over device comprises one and is installed in the switch unit that ratchet unit and between this pedestal and this shell body is mounted on this shell body, is characterized in:

This ratchet unit have a cover be fixed in this output shaft and the positioning ratchet wheel, of this bearing side be sheathed on this pedestal and can this shell body internal linear move but the clutch ratchet, that can not rotate is sheathed on this output shaft and the driven ratchet, between this positioning ratchet wheel and this clutch ratchet is set in outside this positioning ratchet wheel and the flexible member of butted this bearing and this driven ratchet and be installed in this shell body and this clutch ratchet between several flexible members; This positioning ratchet wheel is provided with a plurality of hook tooths with the opposite face of this driven ratchet, and this clutch ratchet also is provided with a plurality of hook tooths with the opposite face of this driven ratchet;

This switch unit has the two symmetry perforation, that are arranged at this shell body and is sheathed on this pedestal and pastes the control loop that the actuator and that touches this clutch ratchet is sheathed on this shell body; This control loop has two rectangular oblique guide grooves; The two symmetrical nose bars that this actuator has a collar and extends radially from this collar, and this two nose bar passes this two perforation and is placed through this two oblique guide groove; Each oblique guide groove respectively has a trench bottom, and one from this trench bottom groove top of oblique ascension gradually.

By above-mentioned composition, make this two nose bar be positioned at this two trench bottom when rotating this control loop, then this clutch ratchet separates with this driven ratchet, and at this moment, this output shaft is the output form that can only rotate; Make this two nose bars liter move to this two grooves top when rotating this control loop, then this actuator promotes this clutch ratchet towards this driven ratchet displacement, and this hook tooth is meshing with each other, and then make this driven ratchet be subjected to this clutch ratchet location and can't rotate, at this moment, put a workpiece when this output axial compression and drive this positioning ratchet wheel towards this driven ratchet displacement, then several hook tooths between this positioning ratchet wheel and this driven ratchet are engageable state, when this output shaft is subjected to transmission and when driving this positioning ratchet wheel and rotating, this hook tooth just can constantly mesh, and drive this output shaft generation linear reciprocal movement, make this output shaft present the output form of tool percussion eventually.

(4) description of drawings

Be elaborated below by most preferred embodiment and accompanying drawing function change-over device to the utility model electric tool, in the accompanying drawing:

Fig. 1 is an outside drawing of existing a kind of electric tool.

Fig. 2 is a local assembled sectional view of existing electric tool, illustrates that a hammer mechanism and switches the unit.

Fig. 3 is not complete exploded perspective view, illustrates that a preferred embodiment of the utility model function change-over device is mounted on the state of an electric tool.

Fig. 4 is a vertical view of this preferred embodiment, illustrates that an output shaft is in no percussion state.

Fig. 5 is an assembled sectional view of this preferred embodiment, illustrates that this output shaft is in no percussion form.

Fig. 6 one is similar to the view of Fig. 5, and the state that a driven ratchet is rotated by a location ratchet transmission is described.

Fig. 7 one is similar to the view of Fig. 4, illustrates that this output shaft is in the percussion state.

Fig. 8 one is similar to the view of Fig. 6, illustrates that this output shaft is in the percussion form.

Fig. 9 is an assembled sectional view of this preferred embodiment, illustrates that this output shaft is in maximum outputting torsion state.

(5) specific embodiment

Being noted that employed relative position term in entire description, is for orientation shown in Figure 5 as " left side ", " right side ".

Shown in Fig. 3,4, the preferred embodiment of the utility model function change-over device is mounted on the electric tool 20, and this electric tool 20 has a motor 21, and tied a shell body 23 in this gear mechanism 22, is installed in a pedestal 24 in this shell body 23 and a bearing 25 and and is arranged in this bearing 25 and can be by the output shaft 26 of these gear mechanism 22 transmissions by gear mechanism 22, a lock of these motor 21 transmissions.

Be that a hammer 70 is mounted on this output shaft 26 during use, then, this gear mechanism 22 of these motor 21 transmissions rotates when driving this output shaft 26, the tool heads (not shown) that is mounted on this hammer 70 just can rotate, and can rotate operations such as a spiral lock (not shown) or boring.

In the present embodiment, this shell body 23 has a lock and ties the body 232 and that lock-combining part 231 in this gear mechanism 22, extends vertically from this lock-combining part 231 and bring the spiro-locking section 233 of extension vertically together from this body 232.

This pedestal 24 has one and is embedded in and sets body 241 in this lock-combining part 231 and this body 232, and one sets portion 241 from this and brings the sleeve column 242 that extends towards this spiro-locking section 233 vertically together.

This function change-over device comprises one and is installed in the switch unit 40 that these shell body 23 interior ratchet unit 30 and are mounted on this housing unit 23.

Shown in Fig. 3,5, this ratchet unit 30 comprises that a cover is fixed in this output shaft 26 and the positioning ratchet wheel 31, in these bearing 25 left sides and is sheathed on to be this sleeve column 242 outside and can linearly moves but rotatable clutch ratchet 32, is sheathed on this output shaft 26 and the driven ratchet 33, between this positioning ratchet wheel 31 and this clutch ratchet 32 is set in outside this positioning ratchet wheel 31 and the flexible member 34 of butted this bearing 25 and driven ratchet 33 and install in this shell body 23 and several flexible members 35 of butted this clutch ratchet 32.

The opposite face of this positioning ratchet wheel 31 and this driven ratchet 33 and be provided with can intermeshing hook tooth 311,331 and the opposite face of this driven ratchet 33 and this clutch ratchet 32 be provided with the hook tooth 321,332 that can be meshing with each other and break away from.This driven ratchet 33 also has a bulge loop 333 that can supply this flexible member 34 to install.

In the present embodiment, this clutch ratchet 32 has radially extended equal angles three support arms 322 at interval, and when this support arm 322 being inserted in the corresponding guide groove (not shown) of this shell body 23, this clutch ratchet 32 just can only linearity move and can't rotate.

In addition, in the present embodiment, be provided with three flexible members 35 with respect to these three support arms 322, and this flexible member 35 is that device is also butted in this support arm 322 in the guide groove of this shell body 23, can produce left-hand thrusts and have the effect that this clutch ratchet 32 can be resetted rapidly this clutch ratchet 32.

This ratchet unit 30 comprises that also one is sheathed on this output shaft 26 and the pad 36 between this sleeve column 242 and this driven ratchet 33.

This switch unit 40 comprises that the two symmetry perforation 41, that are arranged at this body 232 are sheathed on this sleeve column 242 and set the control loop 43 that actuator 42 and between body 241 and this clutch ratchet 32 is sheathed on this body 232 at this.

This control loop 43 has and corresponds to this two perforation, two rectangular oblique guide grooves 431 of 41, be from the left end of this control loop 43 towards right-hand member oblique ascension gradually, each oblique guide groove 431 has the trench bottom 432 near left end, and near groove top 433 (see figure 8)s of right-hand member.Preferably, two guide blocks 434 that can be shaped in the inboard of these two oblique guide grooves 431 at the inner ring surface of this control loop 43, and the right side of this two guide block 434 is cascaded surface 435.

This actuator 42 has a collar 421 and and radially extends and can pass this two perforation 41 and be placed through two symmetrical nose bars 422 in this two oblique guide groove 431 from this collar 421.

As shown in Figure 4, preferably, this switch unit 40 comprises that also one is arranged at the indication assembly 44 of an outer ring surface of this control loop 43, and it has a groove 441, a system is located at the fixed block 443 that the identification pattern 442 and in this groove 441 is located at this control loop 53 and is positioned at this groove 441.This identification pattern 442 has an electric drill pattern 445 and a hammer pattern 444 (see figure 7)s.

As shown in Figure 5, this preferred embodiment comprises that also one is sheathed on the flexible member 60 of a bulge loop 261 of this output shaft 26 and butted this bearing 25 and this output shaft 26.

Shown in Fig. 4,5, when clockwise direction rotates this control loop 43, can present this electric drill pattern 445, be to make this two nose bar 422 carry over this oblique guide groove 431 to be moved to this trench bottom 432, produce relatively and drive the effect of this actuator 42, at this moment toward left dislocation, this clutch ratchet 32 is subjected to the bullet tension force effect of this flexible member 35 and this actuator 42 that reclines, and with these driven ratchet 33 separated attitudes, then work as this output shaft 26 and be subjected to transmission, can only rotate.

Need to prove, as shown in Figure 6, under the state that the driven ratchet 33 of this clutch ratchet 32 and this separates, putting a workpiece when this tool heads (not shown) pressure makes this output shaft 26 toward left dislocations, then drive this positioning ratchet wheel 31 also toward left dislocation, and make several hook tooths 331 of this hook tooth 311 engageable these driven ratchets 33, at this moment, when this output shaft 26 is subjected to transmission and rotates, this positioning ratchet wheel 31 also rotates, when this positioning ratchet wheel 31 several hook tooths 311 with this driven ratchet 33,331 engagements, then can drive this driven ratchet 33 rotates, under this state, can prevent directly this sleeve column 242 of bump of this driven ratchet 33 by this pad 36, and then have the effect that can reduce this driven ratchet 33 and the 24 generation wearing and tearing of this pedestal.

As Fig. 7, shown in 8, when counterclockwise rotating this control loop 43, can present this hammer pattern 444, be to make this two nose bar 422 carry over this oblique guide groove 431 to be moved to this groove top 433, relatively produce and drive the turn right effect of displacement of this actuator 42, and this actuator 42 can promote the displacement of turning right synchronously of this clutch ratchet 32, and make this hook tooth 321 mesh several hook tooths 332 of these driven ratchets 33, then can't rotate because of this clutch ratchet 32, and then this driven ratchet 33 also can't be rotated and be positioning states, then, putting a workpiece when this tool heads (not shown) pressure makes this output shaft 26 toward left dislocations, this positioning ratchet wheel 31 is also toward left dislocation, and make several hook tooths 331 of this hook tooth 311 engageable these driven ratchets 33, be subjected to transmission and rotate when this output shaft 26 like this, this positioning ratchet wheel 31 also rotates, but because of not rotating these driven ratchet 33 location, so this hook tooth 311,331 can constantly mesh, and by the tooth top portion of hook tooth and these output shaft 26 generation linear reciprocal movements of height official post of tooth bottom, make this instrument that this workpiece is produced percussion (or counterweight effect eventually, hammer), reach the use effect that conveniently to hole.

Need to prove, can make the reciprocating motion effect of this output shaft 26 better by this flexible member 60.

In addition, can make these two nose bars, 422 displacement stability preferable, reach the preferable (see figure 3) of locating effect that makes this two nose bar 422 by this two cascaded surface 435 by this two guide block 434.

Shown in Fig. 3,9, this preferred embodiment also comprises a torsion adjusting device 50, have one be installed in this gear mechanism 22 and be subjected to the torsion ring seat 51 of transmission, adjustment ring 52, that a spiral shell is located at this spiro-locking section 233 be installed in these adjustments ring 52 left sides index dial 53, the body 232 that is arranged on this outer cover body 23 and this pedestal 24 the portion that sets 241 a plurality of axial through

bore

54,55 and install a plurality of elasticity assemblys 56 between this index dial 53 and each axial through

bore

54,55.

This torsion ring seat 51 has a plurality of projections 512 that are formed at a right anchor ring 511.Each elasticity assembly 56 has a spring 562 and that places the ejector pin 561, in these index dial 53 left sides to be sheathed on this ejector pin 561 and is subjected to this spring 562 butted and press the ball 563 of putting this right side anchor ring 511.

For easy to operate, can adjust at this and encircle noose one cap bag 57 outside 52, when rotating these adjustment ring 52 generation linear displacements of these cap bag 57 drives, can change the distance between this index dial 53 and this torsion ring seat 51, can change the bullet tension force size of this spring 562 relatively, and then can change the pressure that this ball 563 bestows this torsion ring seat 51 and put strength, reach the effect of adjusting these output shaft 26 outputting torsion sizes eventually, turned to this ejector pin 561 and installed when adjusting ring 52 in this ball 563, because of a plurality of projections 512 of this torsion ring seat 51 can't be crossed this ball 563, so presenting can't rotary state, makes this output shaft 26 have maximum outputting torsion relatively.

Conclude above-mentioned, the effect of the function change-over device of the utility model electric tool and advantage as described later:

One, because the utility model is to reach this output shaft 26 outputs of switching by rotating this control loop 43 The effect of form reaches the effect of adjusting these output shaft 26 outputting torsions, institute by rotating this cap bag 57 To have very easily identification of operator, not have the operation puzzlement, relatively have the good effect of ease of use and advantage.

Two, because the utility model is provided with this indication assembly 44 at this control loop 43, the operator can By being to present this hammer pattern 444 or this electric drill pattern 445, learn easily the output of this output shaft 26 Form is the tool impact conditions or do not have impact conditions, and to have operation ease splendid so the utility model is real Effect and advantage.

Three, because the utility model need only rotate this control loop 43, just can make this clutch ratchet 32 and be somebody's turn to do Driven ratchet 33 separates rapidly or engagement, and this output shaft 26 is does not have the output of impact form or tool punching Hit the output form, so have effect and the advantage that to switch fast these output shaft 26 output forms.

Claims

1. the function change-over device of an electric tool, this electric tool has a motor, a gear mechanism by this motor transmission, one group and ties shell body in a casing of this gear mechanism, is installed in that a pedestal in this shell body and a bearing and are arranged in this bearing and by the output shaft of this gear mechanism transmission, this function change-over device comprises one and is installed in the switch unit that ratchet unit and between this pedestal and this shell body is mounted on this shell body, it is characterized in that:

This ratchet unit comprises: a cover is fixed in this output shaft and is sheathed on this pedestal at the positioning ratchet wheel, of this bearing side and can move but rotatable clutch ratchet, is sheathed on this output shaft and the driven ratchet, between this positioning ratchet wheel and this clutch ratchet is set in outside this positioning ratchet wheel and the flexible member of butted this bearing and this driven ratchet and be installed in this shell body and several flexible members of butted this clutch ratchet in this shell body internal linear; And this positioning ratchet wheel is provided with a plurality of hook tooths with the opposite face of this driven ratchet, and the opposite face of this driven ratchet and this clutch ratchet also is provided with a plurality of hook tooths;

This switch unit comprises: the two symmetry perforation, that are arranged at this shell body are sheathed on this pedestal and subsides and touch the control loop that the actuator and of this clutch ratchet is sheathed on this shell body; This control loop also corresponds to this two perforation and is provided with two rectangular oblique guide grooves;

This actuator has a collar and extends radially and pass this two perforation and penetrate two nose bars of this two oblique guide groove from this collar.

2. the function change-over device of electric tool as claimed in claim 1 is characterized in that:

This ratchet unit comprises that also one is sheathed on this output shaft and the pad between this pedestal and this driven ratchet.

3. the function change-over device of electric tool as claimed in claim 1 or 2 is characterized in that:

This function change-over device comprises that also one is sheathed on the flexible member of a bulge loop of this output shaft and butted this bearing and this output shaft.

4. the function change-over device of electric tool as claimed in claim 1 or 2 is characterized in that:

This switch unit comprises that also one is arranged at the indication assembly of this control loop, and it has groove, a system that is arranged at an outer ring surface of this control loop and is located at the fixed block that the interior identification pattern and of this groove is located at this control loop and is positioned at this groove.

5. the function change-over device of electric tool as claimed in claim 3 is characterized in that:

6. the function change-over device of electric tool as claimed in claim 1 is characterized in that:

This electric tool also has a torsion regulation unit, comprise one be installed in this casing by the torsion ring seat of this gear mechanism transmission, one from screw lock post that this shell body extends vertically, adjustment ring, that a spiral shell is located at this screw lock post be sheathed on this screw lock post and can linearly move and paste the index dial that touches this adjustments and encircle, respectively be arranged at a plurality of axial through bore of this shell body, pedestal and be installed in this index dial and this axial through bore and this torsion ring seat between a plurality of elasticity assemblys; Each elasticity assembly has spring and that an ejector pin, that installs this index dial is sheathed on this ejector pin and is subjected to this spring butted and press and put the ball of this torsion ring seat; This torsion ring seat is faced an anchor ring of this ball and is provided with a plurality of projections.