CN2334549Y

CN2334549Y - Knob switching means capable of 360 deg. backward-forward turning

Info

Publication number: CN2334549Y
Application number: CN 98219006
Authority: CN
Inventors: 钟李杏枝
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-18
Filing date: 1998-09-18
Publication date: 1999-08-25
Anticipated expiration: 2008-09-18

Abstract

The utility model belongs to the design field of an electric tool structure. The utility model is composed of a barrel body, a sleeve barrel, a rolling ball, a fixing element, a rotary element, a pad sheet and an elastic element which are fixed on an electric tool. A turn button can be rotated forwards or backwards to drive the rotary element to rotate, so a cam of the rotary element and the bulge part of the fixing element are pushed with each other to make the rotary element press and clamp the pad sheet and the elastic element, and the pressing and clamping force is transferred from the sleeve barrel to the rolling ball to make the rolling ball pressed and clamped on a drive device in the electric too. Thus, the torsion of an output shaft is adjusted and switched over. The utility model can rotate at an angle of 360 DEG to adjust the torsion of the output shaft, so the utility model is used conveniently and rapidly.

Description

Knob switching device shifter that can 360 ° of rotatings

The utility model belongs to the electric tool structure design field, and is particularly a kind of when no matter knob being done 360 ° positive and negative or reverse rotation, all can adjust the device of electric tool output shaft torsion.

The conventional electric tool that can adjust torsion, be to establish a knob in the outside of output shaft, but this knob interlock is located at the interior mechanism of tool body to adjust the torsion of output shaft, and on knob, be provided with indicating graduation, and the scale and the sign that are provided with in order to expression torsion hop count on the surface of electric tool have numeral, when desire is adjusted needed torsion, be to reach, and read the torsion that is obtained by the aligned position of indicating graduation on the knob and the scale on the tool body by the rotation knob.Yet, torsion is traditionally adjusted knob all can't do 360 ° of rotations, just, its rotation direction is to be arranged by the paramount torsion shelves of low torsion shelves, in case rotate paramount torsion shelves, but desire is used when hanging down the torsion shelves the then necessary nearly origin position of reverse rotation tieback, the angle of required rotation changes big thus, uses inconvenient.

The purpose of this utility model be to propose a kind of by knob, electric tool, retaining element, spinner member, pad, flexible member, sleeve and ball form can 360 ° of rotatings the knob switching device shifter, it is not only easy to use, and can switch the torsion of adjusting output shaft, thereby solved the existing in prior technology problem.

The technical scheme that the utility model adopted is that it includes:

One electric tool, it is installed with a cylindrical shell, establishes the set centre bore of cylindrical shell and wears out an output shaft, and the electric tool of this cylindrical shell root position is provided with a plurality of the perforation to the hole of electric tool inside, has inserted ball in this hole;

One sleeve, it is axially to be sheathed on said cylindrical shell, makes between this sleeve and this cylindrical shell to rotate relatively, and makes this sleeve ends be contacted with said ball;

One flexible member, it is to be sleeved on said cylindrical shell, and is contacted with said sleeve;

One pad, it is axially to be sleeved on said cylindrical shell and to contact with said flexible member, and makes and can not rotate relatively between this pad and the cylindrical shell but can axially relatively move;

One spinner member, it axially is sleeved on said cylindrical shell, and it can be rotated and axially relatively move relatively with this cylindrical shell, and the leading flank of this spinner member is provided with the cam of a plurality of circular arcs, and is provided with a plurality of lugs in its outer shroud week;

One retaining element, it axially is sleeved on said cylindrical shell, and it can not be rotated relatively with this cylindrical shell, and the trailing flank of this retaining element is provided with a plurality of protuberances corresponding to above-mentioned each cam position;

One knob, its madial wall be axially arranged with the chute that several can cooperate for lugs of above-mentioned spinner member, this lug can be moved in this chute, and this knob is matched with said electric tool;

By above-mentioned structure, it can rotate this knob forward or backwards and rotate with the driven rotary element, and then the protuberance that makes the cam of spinner member and retaining element promotes mutually and make spinner member press pad and flexible member, and make and press strength and be passed to ball via sleeve, to make ball press being located at the drive unit of electric tool inside, to adjust the torsion that switches output shaft.

Advantage of the present utility model is, this knob switching device shifter can be in order to adjust that output shaft torsion knob can be done 360 ° of rotations and the torsion of adjusting output shaft make by high torsion and switch to low torsion, or very convenient when switching paramount torsion by low torsion, and quick.

Fig. 1 is the three-dimensional exploded view of each element syntagmatic of the utility model.

Fig. 2 is the part plan cutaway view of the structure after the element of Fig. 1 makes up.

Fig. 3 is a stereogram of observing the structure of spinner member and retaining element from another angle.

Fig. 4 is the plan view of the set cam arrangement position of spinner member of the present utility model.

Fig. 5 is the plan view of the set protuberance arrangement position of retaining element of the present utility model.

Further specify preferred embodiment of the present utility model in conjunction with above-mentioned each accompanying drawing now.As depicted in figs. 1 and 2, the utility model includes an electric tool 1, a sleeve 2, a flexible member 3, a pad 4, a spinner member 5, a retaining element 6 and a knob 7.Wherein:

The front end of electric tool 1 is installed with a non-circular cylindrical shell 10 (end of embodiment of the present utility model is generally triangular in shape), these cylindrical shell 10 set centre bores wear out an output shaft 11, the electric tool 1 of these cylindrical shell 10 root positions is provided with a plurality of holes 12 that connect to electric tool inside, in these holes 12, inserted a ball 13 respectively, make these balls 13 can touch the rotating disk (not shown) of the driving mechanism of being located at electric tool 1 inside, because this driving mechanism does not relate to the emphasis of the utility model demand, so do not repeat them here.This sleeve 2 is the cylindrical body of a circle, and it can directly axially be set in this cylindrical shell 10, and makes the one end in contact in the above-mentioned ball 13 that places in the hole 12; The preferred embodiment of flexible member 3 is the compression spring, and it directly is sleeved on said cylindrical shell 10, and is contacted with sleeve 2; This pad 4 is provided with the locating hole 40 of corresponding cylindrical shell 10 end shapes, and the leading flank of this pad 4 is provided with several teats 41, be that locating hole 40 with this pad 4 axially is sleeved on cylindrical shell 10 and contacts with said flexible member 3, make and to rotate relatively between this pad 4 and the cylindrical shell 10 but can move to axial.This spinner member 5 is the cylindrical body that form a circle, and endoporus with circle, can utilize this inner hole sleeve to be located at this cylindrical shell 10, make this spinner member 5 can with cylindrical shell 10 relative rotations, the leading flank of this spinner member 5 is provided with the cam 51 of a plurality of circular arcs, and these cams 51 are that shape is arranged in the shape of a spiral, as shown in Figure 4, and trailing flank is provided with the annular tooth 53 of teat 41 positions of corresponding above-mentioned pad 4, as shown in Figure 3, and is provided with a plurality of lugs 52 in its outer shroud week.This retaining element 6 is to form the locating hole 60 with corresponding above-mentioned cylindrical shell 10 end shapes, this locating hole 60 is sleeved on to make behind the cylindrical shell 10 and can not rotates relatively between retaining element 6 and the cylindrical shell 10 but can move to axial, the trailing flank of this retaining element 6 is provided with several protuberances 61 corresponding to above-mentioned each cam 51 position, and these protuberances 61 are that shape is arranged in the shape of a spiral, as shown in Figure 5; The madial wall of this knob 7 is axially arranged with several chutes 71 that can supply the lug 52 of above-mentioned spinner member 5, when making this knob 7 be combined in electric tool 1, lug 52 is contained in this chute 71, as shown in Figure 2.

By above-mentioned structure, it can rotate this knob 7 forward or backwards and rotate with driven rotary element 5, and then the cam 51 of spinner member 5 and the protuberance 61 of retaining element 6 are promoted mutually, because retaining element is positioned at the bottom of knob 7 and non-rotatable, so when spinner member 5 rotates, to cause protuberance 61 actuating cams 51 and make spinner member 5 press the effect of pad 4 and flexible member 3, and make and press strength transmission to sleeve 2, be passed to ball 13 by sleeve 2 again, and because ball 13 is the rotating disks that are contacted with the driving element of electric tool 1 inside, so the strength that acts on rotating disk when ball 13 heals when big, the suffered resistance of rotating disk is healed big, so can improve the torsion of output shaft 11; On the contrary, the strength of rotating disk that ball 13 acts on driving mechanism is littler, and then the suffered resistance of rotating disk is littler, thereby can reduce the torsion of output shaft 11, reaches the purpose of adjusting torsion according to this.In addition, utilize design of the present utility model, because being located at the cam 51 of spinner member 5 is to be the circumference helical arrangement, and the protuberance 61 of being located at retaining element 6 also is the circumference helical arrangement, so knob 7 driven rotary elements 5 can make cam 51 contact with the peak of protuberance 61 when rotating to certain angle and make ball 13 be subjected to maximum force, to obtain high torsion, and when crossing this peak, promptly can make protuberance 61 fall into the minimum point of cam 51 and make the suffered active force minimum of ball 13, to obtain low torsion, just, high, switching between the low torsion is except can be just, outside counter-rotating is controlled, also can be always just then the acquisition of making zero, or counter-rotating is made zero and is obtained always, its convenience of controlling is excellent.

More than said; only be in order to explain preferred embodiment of the present utility model; be not that attempt is done any pro forma restriction to the utility model according to this; so; all have in that identical creation spirit is following do relevant any modification of the present utility model or change, all must be included in the scope of the utility model claim protection.

Claims

1, a kind of knob switching device shifter that can 360 ° of rotatings is characterized in that it includes:

One electric tool, it is installed with a cylindrical shell, and the set centre bore of this cylindrical shell wears out an output shaft, and the electric tool of this cylindrical shell root position is provided with a plurality of the perforation to the hole of electric tool inside, has inserted ball in this hole;

Axially be sheathed on said cylindrical shell, and can a counterrotating sleeve between this cylindrical shell, and make this sleeve ends be contacted with said ball;

Be sleeved on said cylindrical shell, and be contacted with a flexible member of said sleeve;

Axially be sleeved on said cylindrical shell and contact with said flexible member, and with this cylindrical shell between can not rotate relatively but the pad that can axially relatively move;

Axially be sleeved on said cylindrical shell, and a spinner member that can rotate relatively and axially relatively move with this cylindrical shell, the leading flank of this spinner member is provided with the cam of a plurality of circular arcs, and is provided with a plurality of lugs in its outer shroud week;

Axially be sleeved on said cylindrical shell, and make it and this cylindrical shell can not a counterrotating retaining element, the trailing flank of this retaining element be provided with a plurality of protuberances corresponding to above-mentioned each cam position;

One knob, its madial wall be axially arranged with the chute that several can move therein for lugs of said spinner member, and this knob is matched with said electric tool.

2, according to the said knob switching device shifter that can 360 ° of rotatings of claim 1, it is characterized in that said cylindrical shell, its external diameter is non-circular, and this pad and retaining element are equipped with the locating hole that is fixed in should the cylindrical shell end shape.

3, according to the said knob switching device shifter that can 360 ° of rotatings of claim 1, it is characterized in that said pad, its leading flank is provided with a plurality of teats, and the trailing flank of this spinner member is provided with annular tooth that should the teat position.