CN202517460U - Electric tool capable of manually and automatically changing speed - Google Patents

Abstract

The utility model provides an electric tool capable of manually and automatically changing speed. A user does not need to automatically set a speed gear when the electric tool is in an automatic speed changing mode; the electric tool can automatically return a high speed state during starting; with the increasing of a working load, the rotation speed can be automatically converted and reduced to increase work output torque, so that optimal working efficiency is achieved and the tool is protected in a workable state; and the electric tool provided by the utility model can conveniently work in a single form when the electric tool is set in a manual operation mode.

Description

But hand self-shifting electric tool

Technical field

The utility model relates to a kind of electric tool, and particularly this electric tool has the mechanism that can between hand gear and fluid drive, change.

Background technology

Usually have the function of multistage speed change with the electric tool (for example electric drill) of rotation mode outputting power, yet, no matter be two sections speed changes or three sections speed changes, or even multistage speed change more, the selection of its speed and operation, all need by the user voluntarily manual operation set; Therefore, if run into the user who does not have tool operation experience or knowledge, often because setting and operation that can't be correct cause instrument can't reach due duty in use, even cause tool damage.

The utility model content

The purpose of the utility model is to solve the electric tool that prior art has the multistage speed changing function; The selection of its speed and operation; All need be by user's manual operation setting voluntarily; Cause easily because how the user is unfamiliar with or does not know to cause operating and setting instrument can't obtain due duty, even to cause the problem of tool damage.

The utility model provides can be manually from the electric tool of speed change; Under automatic shift mode; The user need not set up speed stage on their own, but electric tool itself can automatic involution be a fast state when starting, and then reduces the torsion of rotating speed with raising work output from line translation when increasing along with operating load; Use the operating efficiency that reaches best, and the protection instrument itself is in the state that can work.The electric tool of the utility model also can be set to manual operation mode, makes under the working condition of single kenel (to carry out the boring in single aperture like big quantity), can reach operation the most easily.

Can be manually comprising from the electric tool of speed change of the utility model: one has the output unit of an output shaft; One has the cylindrical shell in interior space, and the sidewall of this cylindrical shell is along axially being provided with a plurality of chutes, and this cylindrical shell is combined in this output unit; One change-speed gearing group; Be combined in the interior space of this cylindrical shell; This change-speed gearing group include from first end toward second end in regular turn an output end face, one first speed change internal gear, one second speed change internal gear of axially-aligned, with a rotating disk, this output end face connects said output shaft, second end of this first speed change internal gear is provided with a plurality of first double wedges; The external diameter of this second speed change internal gear is provided with a plurality of second double wedges, and second end of this rotating disk is provided with a plurality of the 3rd double wedges; One locked component; Be combined in the external diameter of this cylindrical shell, and can axially relatively moving with this cylindrical shell, this locked component is provided with a plurality of toward first end and the axially extended pad of second end; And a plurality of pawls that collude of past second end extension; This colludes the pawl activity and is matched with this chute, and first end of this pad is provided with spring, makes this output unit of first end in contact of this spring; One speed change is switched ring; Be combined in second end of this cylindrical shell; The first end ora terminalis that this speed change is switched ring is provided with a plurality of inclined-planes group; Second end that this speed change is switched ring is provided with a plurality of the 4th double wedges, and this speed change second end ora terminalis of switching ring is provided with a plurality of tooth portion, this inclined-plane group of second end in contact of the pad of said locked component; One function is switched ring, is combined in second end that this speed change is switched ring; One moves internal gear, is combined in the internal diameter that this speed change is switched ring and function switching ring, and this external diameter that moves internal gear has a circular groove groove, and internal diameter has a plurality of internal tooths, and first end has a plurality of the 5th double wedges, and second end has a plurality of the 6th double wedges; One affects assembly, and activity is combined in this circular groove groove that moves internal gear; One internal gear is combined in the internal diameter that this moves internal gear, and this internal gear has a plurality of outer toothed portion that are distributed in its external diameter, and a plurality of internal tooth portion that is distributed in its internal diameter; One drive plate; Its first end is provided with a travelling gear, and its second end is pivoted with a plurality of planetary gears, and these a plurality of planetary gears make up the internal diameter in said mobile internal gear; And mesh the outer toothed portion that this moves internal tooth and this internal gear of internal gear simultaneously, this this change-speed gearing group of travelling gear engagement; One end cap; Be combined in second end that this moves internal gear, the external diameter of this end cap is provided with a plurality of the 7th double wedges, and is provided with an oblique chute at the sidewall of end cap; The said assembly that affects flexibly connects this oblique chute; The sidewall of this end cap is pivoted with the gear of a plurality of outstanding its internal diameters, and the internal tooth of the said mobile internal gear of this gears engaged and the outer toothed portion of this internal gear are when this end cap is manually controlled toward first direction or second direction rotation; Drive this and affect assembly to move, and then control the 7th double wedge whether this 6th double wedge that moves internal gear meshes this end cap toward first end or second end; One automatic transfer switch; Be located at said cylindrical shell; This automatic transfer switch connects the said assembly that affects; Control this and affect assembly to move, and then the pawl that colludes of controlling this locked component according to the situation of live load automatically moves first double wedge, second double wedge or the 3rd double wedge to mesh said change-speed gearing group toward first end or second end.

Description of drawings

Fig. 1 is for showing the embodiment stereogram of the utility model electric tool overall appearance;

Fig. 2 is for showing the three-dimensional exploded view of the utility model primary clustering syntagmatic;

Fig. 3 is the three-dimensional exploded view of the primary clustering syntagmatic of the speed change gear of demonstration the utility model;

Fig. 4 A and Fig. 4 B switch the embodiment stereogram of ring structure for the speed change that shows the utility model respectively from different perspectives;

Fig. 5 A and Fig. 5 B are for show the embodiment stereogram of the end cover structure of the utility model respectively from different perspectives;

Fig. 6 A and Fig. 6 B switch the embodiment stereogram of ring structure for the function that shows the utility model respectively from different perspectives;

Fig. 7 is the stereogram of the structure of demonstration the utility model switching device;

Fig. 8 produces the structural representation of the form output of the high torsion of the slow-speed of revolution for showing the utility model under automatic shift mode;

Fig. 9 shows the utility model under automatic shift mode, when operating load strengthens gradually, and the sketch map that locked component moves toward second extreme direction;

Figure 10 is for showing the utility model under automatic shift mode, and the pawl that colludes of locked component changes second double wedge that meshes the second speed change internal gear into, and the sketch map that the second speed change internal gear can't be rotated;

Figure 11 moves the 7th double wedge engagement of the 6th double wedge and the end cap of internal gear for showing the utility model under manual shift mode, causes moving all fixing sketch map that can't rotate of internal gear and internal gear;

Figure 12 moves the 5th double wedge of internal gear and the 4th double wedge engagement that speed change is switched ring for showing the utility model under automatic shift mode, and mobile internal gear can drive speed change and switch the ring sketch map of rotation synchronously; And

Figure 13 is engaged in the embodiment sketch map that speed change is switched the tooth portion of ring for the change gear of the automatic transfer switch of demonstration the utility model.

The primary clustering symbol description

10 speed change gears

100 output units

Shell on 101

1011 output shafts

1012 polygonal axles

1013 bearings

102 change-speed gearing groups

1021 output end faces

10211 polygonal holes

1,022 first speed change internal gears

10,221 first double wedges

1,023 second speed change internal gears

10,231 second double wedges

1024 rotating disks

10241 the 3rd double wedges

103 cylindrical shells

1031 chutes

1,032 first pin-and-holes

1,033 second pin-and-holes

104 locked components

1041 collude pawl

1042 pads

105 springs

106 speed changes are switched ring

1061 speed change plectrums

1062 inclined-plane groups

1063 the 4th double wedges

1064 tooth portions

107 functions are switched ring

1071 function plectrums

1072 grooves

108 internal gears

1081 internal tooth portions

1802 outer toothed portion

109 planetary gears

110 drive plates

1101 travelling gears

1102 pins

111 affect assembly

1110 cross bars

1111 straight-bars

112 move internal gear

1121 internal tooths

1122 the 5th double wedges

1123 the 6th double wedges

1124 circular groove grooves

113 end caps

1131 grooves

1132 axis holes

1133 the 7th double wedges

1134 oblique chutes

1135 the 3rd pin-and-holes

1136 the 4th pin-and-holes

114 gears

115 pivot pins

116 automatic transfer switch

1161 Connection Blocks

11611 breach

11612 holes

11613 hooks

1162 slide blocks

11621 internal threads

11622 perforation

1163 pull bars

11631 pull hooks

1164 worm screws

11641 joysticks

1165 change gear

11651 keyways

2 motors

21 driving shafts

22 motor gears

3 switching devices

31 triggers

311 slotted eyes

4 batteries

5 casings

The specific embodiment

Those skilled in the art below cooperate graphic and element numbers is done more detailed explanation to the embodiment of the utility model, so that can implement after studying this specification carefully according to this.

Like Fig. 1 and shown in Figure 2, but the hand self-shifting electric tool that the utility model provides is that a speed change gear 10, a motor 2 and a switching device 3 are set in a casing 5; And below casing 5 combination one battery 4; These battery 4 feed motor 2 electric power, this switching device 3 comprises the trigger 31 with slotted eye 311, is used for controlling motor 2 and whether operates; The central shaft 21 of motor 2 is provided with a motor gear 22, the gear train in 22 engagement speed change gears 10 of motor gear; The speed change that comprises in the speed change gear 10 is switched the output speed that ring 106 is used for controlling output shaft 1101, and the function that comprises in the speed change gear 10 is switched ring 107 and is used for changing the pattern that electric tool is fluid drive or hand gear.

The electric tool of the utility model has the first relative end and second end, and wherein first end is the end towards workpiece, and second end is the opposite other end, and therefore, first end of the following stated all refers to identical direction, and second end then refers to the direction that another is identical.

As shown in Figure 3, the preferred embodiment of the speed change gear 10 of the utility model includes an output unit 100, a change-speed gearing group 102, a cylindrical shell 103, a locked component 104, a speed change and switches ring 106, one drive plate 110, an internal gear 108, a function and switch ring 107, and affect assembly 111, to move an internal gear 112 and an end cap 113.Wherein, Output unit 100 includes shell 101 on; Two bearings 1013 are set in the last shell 101; And at bearing 1013 combination one output shaft 1101, first end of output shaft 1101 is for being used for the part of gang tool (for example drill bit) or other instrument (for example screwdriver), and second end of output shaft 1101 then is provided with polygonal axle 1012; First distal process of output shaft 1101 goes out to go up first end of shell 101.

As shown in Figure 3; The preferred embodiment of the cylindrical shell 103 of the utility model is one to have the cylindrical body in interior space; At the sidewall of cylindrical shell 103 along axially being provided with a plurality of chutes 1031; The first end lateral wall of cylindrical shell 103 is provided with a lug, and is provided with one first pin-and-hole 1032 and one second pin-and-hole 1033 at this lug, utilizes screw that first end of cylindrical shell 103 is locked in second end of shell 101 and is combined in output unit 100.

As shown in Figure 3; The change-speed gearing group 102 of the utility model is used to be combined in the interior space of cylindrical shell 103; Its preferred embodiment include from first end toward second end axially-aligned in regular turn an output end face 1021, one first speed change internal gear 1022, one second speed change internal gear 1023, with a rotating disk 1024; The central authorities of this output end face 1021 are provided with a polygonal hole 10211; 1012 on the polygonal axle of aforementioned output shaft 1011 penetrates this polygonal hole 10211, can drive output shaft 1011 rotations synchronously when making output end face 1021 rotations; The external diameter that second end of this first speed change internal gear 1022 is provided with a plurality of first double wedge, 10221, the second speed change internal gears 1023 is provided with a plurality of second double wedges 10231, and second end of rotating disk 1024 then is provided with a plurality of the 3rd double wedges 10241; Said output end face 1021, the first speed change internal gear 1022, the second speed change internal gear 1023 are a kind of gear train assemblies with rotating disk 1024, and its combination to each other belongs to existing skill, so will not give unnecessary details.

As shown in Figure 3, the preferred embodiment of the locked component 104 of the utility model is an annulus, and its internal diameter is slightly larger than the external diameter of cylindrical shell 103, makes locked component 104 can be placed in the external diameter of cylindrical shell 103, and can axially relatively move with cylindrical shell 103; The periphery of this locked component 104 is provided with a plurality of holes, and oppresses respectively at each hole a pad 042 is set, and the two ends that make pad 1042 are respectively toward first end and the axially outstanding extension of second end of locked component 104; First end of each pad 1042 then is inserted in a spring 105 respectively; Second end of locked component 104 then is provided with a plurality of pawls 1041 that collude that extend toward second end; When locked component 104 is placed in the external diameter of cylindrical shell 103; Make and respectively collude each chute 1031 that pawl 1041 activities are matched with cylindrical shell 103 external diameters; And the second end appropriate location of shell 101 on first end in contact of each spring 105 makes locked component 104 to move to axial by cylindrical shell 103 by this, but can not relatively rotate.

The speed change of the utility model is switched ring 106 for the movable cylindrical body that is placed in cylindrical shell 103 external diameters, and shown in Fig. 4 A, the periphery of its first end is provided with the inclined-plane group 1062 of corresponding pad 1042 quantity of many groups, and this inclined-plane group 1062 includes the hypotenuse of a plurality of continuous complications; Shown in Fig. 4 B, the second end periphery that speed change is switched ring 106 then is provided with a plurality of the 4th double wedges 1063, and is provided with a plurality of tooth portion 1064 at the external diameter local location of second end; The external diameter that speed change is switched ring 106 then is provided with at least one speed change plectrum 1061; After speed change switching ring 106 is placed in the external diameter of cylindrical shell 103, make second end of each pad 1042 of being located at locked component 104 be contacted with each inclined-plane group 1062 respectively; When speed change is switched ring 106 toward the first direction rotation; Its inclined-plane group 1062 can promote the pad 1042 on the locked component 104; And then promotion locked component 104 moves toward first extreme directions; When speed change switching ring 106 rotated toward opposite second directions, then inclined-plane group 1062 cooperated the elastic force of springs 105 that locked component 104 past second extreme directions are promoted.

Shown in Fig. 6 A and Fig. 6 B, the preferred embodiment that the function of the utility model is switched ring 107 is a kind of annulus body, and its external diameter is provided with a function plectrum 1071, and the internal diameter wall of corresponding function plectrum 1071 positions then is provided with an axially extended groove 1072; Function is switched ring 107 and is combined in second end that speed change is switched ring 106.

As shown in Figure 3; The preferred embodiment of the mobile internal gear 112 of the utility model is to be provided with a circular groove groove 1124 around its circumference at its external diameter; Its first end then is provided with a plurality of the 5th double wedges 1122, and its second end is provided with a plurality of the 6th double wedges 1123, and its internal diameter is provided with a plurality of internal tooths 1121.It is said that to affect the preferred embodiment of assembly 111 be a metal rod; Form the body of a C shape via the Curved Continuous foldable type; One end of this C shape body is connected with a cross bar 1110, and 1110 of cross bars connect a straight-bar 1111, the C shape body that affects assembly 111 is inserted in the circular groove groove 1124 that moves internal gear 112 after; Again cross bar 1110 is inserted in the groove 1072 of function switching ring 107, makes mobile internal gear 112 be arranged in the function switching and encircle 107 internal diameter; By this, when rotating function switches ring 107, can drive and affect assembly 111 in circular groove groove 1124, to move.After moving internal gear 112 and affecting assembly 111 all to be combined in function switching ring 107, then function switching ring 107 is combined in the speed change switching and encircles 106 second end, then make up this drive plate 110 again; First end of said biography dish dish 110 is provided with a travelling gear 1101, the second ends and is provided with a plurality of pins 1102, and each pin 1102 all wears a planet gear 109, with the gear train of travelling gear 1101 in this change-speed gearing group 102 of second end engagement of change-speed gearing group 102; Then again an internal gear 108 is combined in drive plate 110; The internal diameter of this internal gear 108 has a plurality of internal tooth portion 1081; External diameter has a plurality of outer toothed portion 1082; When internal gear 108 is combined in drive plate 110, make its internal tooth portion 1081 be engaged in said each planetary gear 109, outer toothed portion 1082 then is engaged in each internal tooth 1121 that moves internal gear 112.

Shown in Fig. 3, Fig. 5 A and Fig. 5 B; The end cap 113 of the utility model is used for being combined in second end that moves internal gear 112; And the pad 119 by being located in the end cap 113 is isolated internal gear 108 and planetary gear 109, avoids internal gear 108 and planetary gear 109 and end cap 113 inner walls to produce excessive friction; The external diameter of this end cap 113 is provided with a plurality of the 7th double wedges 1133, and is provided with an oblique chute 1134 at the sidewall of end cap 113, saidly affects straight-bar 1111 activities of assembly 111 to insert this oblique chute 1134 ordinatedly; The sidewall of this end cap 113 also is provided with a plurality of grooves 1131; Vertical walls in each groove 1131 is equipped with an axis hole 1132; Utilize again a plurality of pivot pins 115 respectively correspondence after passing a gear 114 this pivot pin 15 is hubbed at this axis hole 1132; Make gear 114 give prominence to the internal diameter of end caps 113, and then make gear 114 engagements move the internal tooth 1121 of internal gear 112, and the outer toothed portion 1082 of engagement internal gear 108.A wall is given prominence in the below of end cap 113, and this wall is provided with one the 3rd pin-and-hole 1135 and one the 4th pin-and-hole 1136.

As shown in Figure 3 again; The automatic transfer switch 116 of the utility model, its preferred embodiment include a connecting seat 1161, and have an internal thread 11621 and a perforation 11622 slide block 1162, a worm screw 1164, a pull bar 1163, one first 117,1 second 118 and one change gear 1165 of having strong market potential of having strong market potential; The opposite end of said Connection Block 1161 is provided with prominent wall; This two prominent wall is provided with corresponding hole 11612; Four corners of Connection Block 1161 are respectively equipped with a breach 11611; Make that two breach 11611 of Connection Block 1161 relative both sides are linearly corresponding, the below of Connection Block 1161 then is provided with the outstanding hook 11613 in a past below.Said pull bar 1163 be by a Metallic rod Curved Continuous foldable type for having a pull hook 11631, pull bar 1163 is located at Connection Block 1161 and makes it receive Connection Block 1161 each breach 11611 catch on and be limited.1164 spirals of worm screw are combined in the internal thread 11621 of slide block 1162; And the end of worm screw 1164 forms a joystick 11641; This joystick 11641 penetrates change gear 1165 set keyways 11651 and accomplishes connection, and 1165 of change gear are engaged in the tooth portion 1064 (shown in figure 13) that speed change is switched ring 106.This first have strong market potential 117 pass worm screw 1164 and change gear 1165 after, make first have strong market potential 117 the two ends penetrate the 3rd set pin-and-hole 1135 of the first set pin-and-hole 1032 of cylindrical shell 103 and end cap 113 respectively; Behind the perforation 11622 that said second has strong market potential 118 passes this slide block 1162, the hole 11612 of this Connection Block 1161; Make second have strong market potential 118 the two ends penetrate cylindrical shell 103 set second pin-and-hole 1033 and the 4th pin-and-hole 1136 of being located at end cap 113 respectively, make the hook 11613 of Connection Block 1161 be inserted in the set slotted eye 311 in a trigger 31 tops then; By this; When driving Connection Block 1161, pull bar 1163 when operating trigger 31 and moving simultaneously with slide block 1162; Be able to drive worm screw 1164 and rotate simultaneously with change gear 1165, and then drive 106 rotations of speed change switching ring, the structure after each combination of components of aforementioned automatic transfer switch 116 is as shown in Figure 7.

The electric tool of the utility model carries out the mode of operation of fluid drive or hand gear to be explained as follows:

Automatic shift mode

Shown in figure 12; When using automatic shift mode, the function plectrum 1071 that the user is switched function ring 107 is stirred and after making function switch ring 107 rotations, i.e. drive affects assembly 111 to rotate simultaneously toward first direction; Affect the straight-bar 1111 of assembly 111 receive end cap 113 tops oblique chute 1134 guiding and move toward first extreme direction; Drive mobile internal gear 112 and move toward first extreme directions, the 5th double wedge 1122 of its first end is meshed with the 4th double wedge 1063 that speed change is switched second end of ring 106, therefore; When mobile internal gear 112 was driven in rotation, speed change was switched also rotation synchronously of ring 106.

Again as shown in Figure 7; When the user pushes the trigger 31 of automatic transfer switch 116, plate machine 31 will drive Connection Block 1161 simultaneously and slide, and the pull bar 1163 of installing on the Connection Block 1161 can slide by pulling slide block 1162 synchronously; And the internal thread 11621 in the slide block 1162 can drive worm screw 1164 rotations; And then driving change gear 1165 rotations, 1165 of change gear drive speed change switching ring 106 and rotate, and speed change is switched the inclined-plane group 1062 of ring 106 first ends because of ramp effect; To promote locked component 104 moves toward first extreme direction; Locked component 104 moves ahead according to gear with plate machine 31 synchronously, covers whole strokes up to plate machine 31, and first double wedge 10221 on the first speed change internal gear 1022 in the change-speed gearing groups 102 is meshed in pawl 1041 meetings of colluding of locked component 104; To mobile internal gear 112 can't be rotated, form the form output of the low torsion of change-speed gearing group 102 high rotating speeds.When operating load strengthened gradually, internal gear 108 suffered reverse active forces also strengthened gradually, when strength during greater than the elastic force of spring 105; Internal gear 108 begins counter-rotating, and its outer toothed portion 1082 driven gears 114 rotate, and then drive internal gear 108 rotations; Drive speed change switching ring 106 rotates synchronously, and speed change switching this moment encircles 106 front end inclined-plane groups 1062 because restriction site changes, under the thrust of spring 105; Locked component 104 can move (as shown in Figure 9) toward second extreme direction, locked component 104 collude second double wedge 10231 that pawl 1041 also will change the engagement second speed change internal gear 1023 from first double wedge 10221 that meshes the first speed change internal gear 1022 into, and the second speed change internal gear 1023 can't be rotated; Form torsion output in the medium speed; To overcome the operating load of output shaft 1011, be able to work on (shown in figure 10) is when operating load continues to increase again; This electric tool can continue above-mentioned action again; Make the 3rd double wedge 10241 that pawl 1041 is changed into engagement rotating disk 1024 again that colludes of locked component 104, and then form the form output of the high torsion of the slow-speed of revolution, (as shown in Figure 8) accomplished in the work that lasts till.

Manual shift mode

Shown in figure 11; When using manual shift mode, the function plectrum 1071 that the user is switched function ring 107 is stirred and is made function switch ring 107 rotation backs toward second directions and drives and affect assembly 111 to rotate toward second directions, affect oblique chute 1134 guiding that the straight-bar 1111 of assembly 111 receives end cap 113 then second extreme direction move; Driving mobile internal gear 112 also moves toward second extreme direction; The 6th double wedge 1123 that moves second end of internal gear 112 can be meshed with the 7th double wedge 1133 of end cap 113 external diameters, and it is fixing and can't rotate to cause moving internal gear 112, and the gear 114 that is meshed is also fixing can't to rotate; And then make with internal gear 108 same the fixing of gear 114 engagements and can't rotate; Although how operating load increased also can not make and moved internal gear 112 rotations this moment, was not have mechanism again with speed change gear itself can produce fluid drive, was the hand gear state; This moment is when carrying out speed change, and only needing to stir the speed change plectrum 1061 that speed change switches ring 106 with hand is convertible rotating speed.

The above person is merely in order to explain the preferred embodiment of the utility model; Be not that the attempt tool is to do any pro forma restriction to the utility model; Therefore; All have in following any modification or change of making relevant the utility model of identical novel spirit, all must be included in the category of the utility model intention protection.

Claims (6)

1. but a hand self-shifting electric tool is characterized in that, comprising:

One output unit has an output shaft;

One cylindrical shell has interior space, and at a plurality of chutes of its sidewall along axial setting, this cylindrical shell is combined in this output unit;

One change-speed gearing group; Be combined in the interior space of this cylindrical shell; This change-speed gearing group include from first end toward second end in regular turn an output end face, one first speed change internal gear, one second speed change internal gear of axially-aligned, with a rotating disk, this output end face connects said output shaft, second end of this first speed change internal gear is provided with a plurality of first double wedges; The external diameter of this second speed change internal gear is provided with a plurality of second double wedges, and second end of this rotating disk is provided with a plurality of the 3rd double wedges;

One locked component; Be combined in the external diameter of this cylindrical shell, and can axially relatively moving with this cylindrical shell, this locked component is provided with a plurality of toward first end and the axially extended pad of second end; And a plurality of pawls that collude of past second end extension; This colludes the pawl activity and is matched with this chute, and first end of this pad is provided with spring, makes this output unit of first end in contact of this spring;

One speed change is switched ring; Be combined in second end of this cylindrical shell; The first end ora terminalis that this speed change is switched ring is provided with a plurality of inclined-planes group; Second end that this speed change is switched ring is provided with a plurality of the 4th double wedges, and this speed change second end ora terminalis of switching ring is provided with a plurality of tooth portion, this inclined-plane group of second end in contact of the pad of said locked component;

One function is switched ring, is combined in second end that this speed change is switched ring;

One moves internal gear, is combined in the internal diameter that this speed change is switched ring and function switching ring, and this external diameter that moves internal gear has a circular groove groove, and internal diameter has a plurality of internal tooths, and first end has a plurality of the 5th double wedges, and second end has a plurality of the 6th double wedges;

One affects assembly, and activity is combined in this circular groove groove that moves internal gear;

One internal gear is combined in the internal diameter that this moves internal gear, and this internal gear has a plurality of outer toothed portion that are distributed in its external diameter, and a plurality of internal tooth portion that is distributed in its internal diameter;

One drive plate; Its first end is provided with a travelling gear, and its second end is pivoted with a plurality of planetary gears, and these a plurality of planetary gears make up the internal diameter in said mobile internal gear; And mesh the outer toothed portion that this moves internal tooth and this internal gear of internal gear simultaneously, this this change-speed gearing group of travelling gear engagement;

One end cap; Be combined in second end that this moves internal gear, the external diameter of this end cap is provided with a plurality of the 7th double wedges, and is provided with an oblique chute at the sidewall of end cap; The said assembly that affects flexibly connects this oblique chute; The sidewall of this end cap is pivoted with the gear of a plurality of outstanding its internal diameters, and the internal tooth of the said mobile internal gear of this gears engaged and the outer toothed portion of this internal gear are when this end cap is manually controlled toward first direction or second direction rotation; Drive this and affect assembly to move, and then control the 7th double wedge whether this 6th double wedge that moves internal gear meshes this end cap toward first end or second end;

One automatic transfer switch; Be located at said cylindrical shell; This automatic transfer switch connects the said assembly that affects; Control this and affect assembly to move, and then the pawl that colludes of controlling this locked component according to the situation of live load automatically moves first double wedge, second double wedge or the 3rd double wedge to mesh said change-speed gearing group toward first end or second end.

2. but hand self-shifting electric tool as claimed in claim 1; It is characterized in that; Said automatic transfer switch include one be provided with hole slide block, a worm screw, the pull bar, one first of Connection Block, with an internal thread and a perforation have strong market potential, one second have strong market potential and a change gear; Said pull bar is located at this Connection Block and is received this Connection Block restriction, and said worm spiral is combined in the internal thread of this slide block, and the end of this worm screw connects this change gear; This first is had strong market potential and is fixed in this cylindrical shell and this end cap after passing this worm screw and this change gear; Be fixed in this cylindrical shell and this end cap behind the perforation that said second has strong market potential passes this slide block and the hole of this Connection Block, this Connection Block connects a trigger, drives this Connection Block, pull bar and slide block by this trigger of operation and moves simultaneously; And then drive this worm screw and change gear is rotated simultaneously, and then drive this speed change and switch the ring rotation.

3. but hand self-shifting electric tool as claimed in claim 2 is characterized in that said change gear is provided with a keyway, and the end of this worm screw penetrates this keyway being connected with completion and this change gear.

4. but hand self-shifting electric tool as claimed in claim 1; It is characterized in that; The said assembly that affects is a metal rod, forms via the Curved Continuous foldable type to have a cross bar is connected this cross bar with one straight-bar, and this straight-bar activity is matched with in this circular groove groove that moves internal gear.

5. but hand self-shifting electric tool as claimed in claim 2 is characterized in that said trigger is provided with a slotted eye, and said Connection Block is provided with a curved ditch, and this curved ditch is matched with this slotted eye, to accomplish being connected of this Connection Block and trigger.

6. but hand self-shifting electric tool as claimed in claim 1 is characterized in that, second end of said output shaft has polygonal axle, and the output end face of said change-speed gearing group is provided with polygonal hole, and this polygonal axle is combined in this polygonal hole.

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