CN100475450C

CN100475450C - Electric screwdriver

Info

Publication number: CN100475450C
Application number: CNB2007100701764A
Authority: CN
Inventors: 陆颂荫
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-20
Filing date: 2007-07-20
Publication date: 2009-04-08
Anticipated expiration: 2027-07-20
Also published as: CN101100054A

Abstract

The present invention discloses one kind of electric screw driver, which includes one power switch, one power interface, one motor comprising one stator and one rotor, one motor rotation direction controlling switch, and one screw driver driving mechanism connected to the motor. It has also one screw driver rotation speed regulating device set inside the rotor casing, and the screw driver rotation speed regulating device includes one planetary gear drive mechanism, one clutch mechanism and one speed regulating mechanism. The present invention has the advantages capacity of regulating the rotation speed of the screw driver, and less damage of the driven screw and the workpiece.

Description

Electric screw driver

Technical field:

The present invention relates to a kind of electric tool, specifically is a kind of electric screw driver.

Background technology:

At present, though the kind of prior art electric screw driver is many, but they mainly still are made up of the rotating gauge tap of housing, motor, gauge tap, the rotating of control motor and some parts such as various types of screwdrivers that are installed on the motor output shaft, the operation principle that adopts the electric screw driver of this structure is that the rotation by motor output shaft drives screwdriver and rotates, and the working power that provides motor output shaft to rotate can be provided by the electric power storage battery of enclosure interior, also can be provided by external power source.Effort that though the prior art electric screw driver has overcome the manual screw cutter effectively when using, time-consuming defective, but because they all can only finish the action of tighten the screws and loosening screw with single rotary speed, therefore still can run into following two problems in actual use: when 1, and rotating speed electric screw driver bigger when screw diameter is very fast, make screw twist curved or damage easily; 2, sometimes need the workpiece meeting of screw tightening harder, if the screw rotation may make workpiece break too soon.

Summary of the invention:

The technical problem to be solved in the present invention is, provide a kind of can set screw swivel speed, when using not only screw be difficult for twisting curved or damage, and workpiece also is difficult for the electric screw driver that breaks.

Technical solution of the present invention is, provide a kind of a kind of electric screw driver, motor, the rotating gauge tap of control motor rotating and the screwdriver transmission mechanism that is connected with motor that it comprises power control switch, power interface, is made up of stator and rotor with following structure; Be provided with in the housing of described rotor one can set screw swivel speed adjusting device; Described adjusting device that can set screw swivel speed comprises planetary gear mechanism, clutch and speed adjusting gear; Described planetary gear mechanism is arranged on the centre of rotor case; Described speed adjusting gear is installed on the axis of motor; Described clutch is arranged on the left and right sides of planetary gear mechanism.

After adopting above structure, compared with prior art, the advantage that the present invention has is: because under the cooperatively interacting of planetary gear mechanism, clutch and speed adjusting gear, motor of the present invention can be regulated three kinds of speed of output, thus make the screwdriver driving mechanism produce fast, in, slow three kinds of velocities of rotation; Because electric screw driver of the present invention can regulate soon, in, velocity of rotation in slow three, therefore make the operator select suitable rotating speed, be difficult for twisting the effect that curved or damage and workpiece are difficult for breaking thereby reach screw according to the size and the hardness of screw and workpiece.

Above-mentioned planetary gear mechanism comprise gear ring, two ends close-fitting the planet alignment pin on the planet carrier be installed in the planet alignment pin on and with its planetary gear that is connected movingly; Described planetary gear is meshed with central gear and gear ring respectively; Described gear ring and planet carrier both sides all are processed with groove.

The left and right sides that above-mentioned clutch is arranged on planetary gear mechanism refers to that described clutch comprises that a long very heavy and right short left side very heavy and that be installed on the very heavy axle in a left side, the right side that is installed on the right very heavy axle is long very heavy and left short very heavy; The very heavy axle of a right very heavy axle and a left side is separately fixed in right ratchet seat and the left ratchet seat; Right long very heavy and right inner spinous ring interlock or relieving; Right short very heavy and right outer sour jujube circle interlock or relieving; Long very heavy and left outer sour jujube circle interlock in a left side or relieving; Short very heavy and left inner spinous ring interlock in a left side or relieving; Be located at right inner spinous ring, right outer sour jujube circle, the outer sour jujube of a left inner spinous ring and a left side and enclose the boss structure on the end face and the mutual interlock of groove of gear ring and planet carrier both sides.

Right ratchet seat on the above-mentioned clutch is rotatably connected by steel ball and rotor protecgulum; Left ratchet seat on the described clutch is connected with the housing interference fit of rotor; Rolling bearing II is housed on the endoporus of described right ratchet seat and the outer cylinder surface of axis to be formed to roll and is connected; Rolling bearing I is housed on the endoporus of described left ratchet seat and the outer cylinder surface of axis to be formed to roll and is connected.

Above-mentioned speed adjusting gear comprises the speed change knob that the screw, the right-hand member that are fixed on the axis right-hand member withstand on the spring I on the screw, right pin, middle push rod, left pin, outer push rod and be connected with outer push rod from right to left successively; Described right pin and left pin pass and are pressed into respectively behind the through hole on the axis during the right speed governing cover that is contained on the axis and left speed governing overlap; Described speed change knob left part is positioned at the outside of shell.

One end of above-mentioned axis is fixedly connected on the hole of motor left side lid by two nut I; The described axis other end has screwed nut II; Rolling bearing III is housed on the endoporus of the right lid of described motor and the outer cylinder surface of right ratchet seat to be formed rolling and is connected.

An above-mentioned speed change knob and a motor left side are covered with gag lever post.

Above-mentioned screwdriver driving mechanism comprises driving shaft, head-shield and capping; Be provided with spring II between described head-shield and the outer casing inner wall; The bearing I V-arrangement is housed on described shell endoporus and the driving shaft outer cylinder surface to be become to roll and is connected; Have the screwdriver mounting groove on the described driving shaft; Be provided with the steel ball that is used for fixing screwdriver in the described screwdriver mounting groove.

Interference and be connected with gear I on the outer cylinder surface of above-mentioned driving shaft; Interference and be connected with the gear II that is meshed with gear I on the outer cylinder surface of described right ratchet seat.

Description of drawings:

Accompanying drawing is the broken section structural representation of electric screw driver of the present invention.

Shown in the figure: 1, shell, 2, rolling bearing I, 3, left ratchet seat, 4, housing, 5, the outer sour jujube circle in a left side, 6, left side inner spinous ring, 7, planet carrier, 8, planetary gear, 9, gear ring, 10, right inner spinous ring, 11, right outer sour jujube circle, 12, the rotor protecgulum, 13, steel ball I, 14, right ratchet seat, 15, bearing I V, 16, gear I, 17, driving shaft, 18, bearing I V, 19, steel ball II, 20, the screwdriver mounting groove, 21, head-shield, 22, capping, 23, screwdriver, 24, spring II, 25, nut II, 26, screw, 27, spring I, 28, rolling bearing II, 29, right speed governing cover, 30, gear II, 31, very heavy spring, 32, rolling bearing III, 33, right pin, 34, right short very heavy, 35, right very heavy axle, 36, middle push rod, 37, right long very heavy, 38, the planet alignment pin, 39, central gear, 40, the very heavy axle in a left side, 41, left side speed governing cover, 42, a left side is short very heavy, and 43, left side pin, 44, a left side is long very heavy, 45, power interface, 46, power control switch, 47, outer push rod, 48, the speed change knob, 49, gag lever post, 50, nut I, 51, axis, 52, the rotating gauge tap.

The specific embodiment:

The invention will be further described below in conjunction with the drawings and specific embodiments:

As shown in drawings, electric screw driver of the present invention comprise shell 1, power control switch 46, power interface 45, the motor of forming by stator and rotor, the rotating gauge tap 52 and the screwdriver transmission mechanism of control motor rotating.Be provided with in the housing 4 of rotor of the present invention one can set screw swivel speed adjusting device; Described adjusting device that can set screw swivel speed comprises planetary gear mechanism, clutch and speed adjusting gear; Described planetary gear mechanism is arranged on the centre of housing 4; Described speed adjusting gear is installed on the axis 51 of motor; Described clutch is arranged on the left and right sides of planetary gear mechanism.

Above-mentioned planetary gear mechanism comprise gear ring 9, two ends close-fitting the planet alignment pin 38 on the planet carrier 7 be installed in planet alignment pin 38 on and with its planetary gear that is connected movingly 8; Described planetary gear 8 is meshed with central gear 39 and gear ring 9 respectively; Described gear ring 9 and planet carrier 7 both sides all are processed with groove.

Speed adjusting gear of the present invention comprises successively that from right to left the screw 26, the right-hand member that are fixed on axis 51 right-hand members withstand on spring I 27, right pin 33, middle push rod 36, left pin 43, outer push rod 47 on the screw 26 and the speed change knob 48 that is connected with outer push rod 47; Described right pin 33 and left pin 43 are pressed into respectively in the right speed governing cover 29 and left speed governing cover 41 that is contained on the axis 51 after passing through hole on the axis 51; Described speed change knob 48 left part are positioned at the outside of shell 1, promote push rod by rotation speed change knob 48, thereby realize the control to speed adjusting gear.

Clutch of the present invention comprises the right side long very heavy 37 that is installed on the right very heavy axle 35 and right short very heavy 34 and be installed in a left side long very heavy 44 and a left side short very heavy 42 on the very heavy axle 40 in a left side; The very heavy axle 40 of a right very heavy axle 35 and a left side is separately fixed in right ratchet seat 14 and the left ratchet seat 3; Right inner spinous ring 10 is contained in the right outer sour jujube circle 11; Left side inner spinous ring 6 is contained in the outer sour jujube circle 5 in a left side, all has boss structure on the end face of right inner spinous ring 10, right outer sour jujube circle 11, the outer sour jujube circle 5 of a left inner spinous ring 6 and a left side, can be engaged with the groove of gear ring 9 and planet carrier 7 both sides.The right side long very heavy 37 and right inner spinous ring 10 interlocks or relieving on the right very

heavy axle

35,11 interlocks or relieving are enclosed with right outer sour jujube in the right side short very heavy 34; And 5 interlocks or relieving are enclosed with the outer sour jujube in a left side in the left side long very heavy 44 on the very heavy axle 40 in a left side, a left side short very heavy 42 and left inner spinous ring 6 interlocks or relieving.Between right ratchet seat 14 and right short very heavy 34, between right ratchet seat 14 and right long very heavy 37, between left ratchet seat 3 and the left side long very heavy 44 and be equipped with respectively between left ratchet seat 3 and the left side weak point very heavy 42 and act on long and short very heavy spring 31 on very heavy, described very heavy spring 31 can make long and short very heavyly flick outside axial around very heavy.

The right ratchet seat 14 of above-mentioned clutch is rotatably connected with rotor protecgulum 12 by steel ball I 13; Left ratchet seat 3 on the described clutch is connected with housing 4 interference fit; Rolling bearing II28 is housed on the outer cylinder surface of the endoporus of described right ratchet seat 14 and axis 51 to be formed to roll and is connected; Rolling bearing I 2 is housed on the outer cylinder surface of the endoporus of described left ratchet seat 3 and axis 51 to be formed to roll and is connected.

One end of axis 51 of the present invention is fixedly connected on the hole of motor left side lid by two nut I 50; Described axis 51 other ends have screwed nut II 25; Rolling bearing III32 is housed on the endoporus of the right lid of described motor and the outer cylinder surface of right ratchet seat 14 to be formed rolling and is connected.Be provided with gag lever post 49 between the lid of speed change knob 48 an and motor left side among the present invention, the effect of gag lever post 49 is distances of restriction speed change knob 48 turns, thus the distance that the control push rod moves.

The screwdriver transmission mechanism comprises driving shaft 17, head-shield 21 and capping 22 among the present invention; Be provided with spring II24 between described head-shield 21 and shell 1 inwall; Bearing I V15,18 is housed on described shell 1 endoporus and driving shaft 17 outer cylinder surfaces to be formed to roll and is connected; Have screwdriver mounting groove 20 on the described driving shaft 17; Be provided with the steel ball II 19 that is used for fixing screwdriver 23 in the described screwdriver mounting groove 20.Interference fit is connected with gear I 16 on the outer cylinder surface of described driving shaft 17; Interference fit is connected with the gear II 30 that is meshed with gear I 16 on the outer cylinder surface of described right ratchet seat 14, after adopting this structure, when right ratchet seat 14 rotates, right ratchet seat 14 can make driving shaft 17 rotate by the engagement of gear I 16 and gear II30, rotate thereby finally drive screwdriver 23.

The operation principle of set screw swivel speed of the present invention is: after the motor energising, the rotation of rotor case 4 drives left ratchet seat 3 rotations, by rotation speed change knob 48, make outer push rod 47 and middle push rod 36 inside and outside flexible, thereby promote left speed governing cover 41 and right speed governing cover 29, make left and right

speed governing cover

41,29 be in diverse location.According to the effect that residing diverse location and planetary gear mechanism are overlapped in speed governing, make long very heavy full interlock or the relieving of an end interlock one end or decontrol three kinds of states entirely, form three kinds of friction speeds.When left and right

speed governing cover

41,29 is in extreme right position, very heavy 44, the 37 full interlocks of left and right length, this moment, motor was slow shelves velocity of rotation; When left and right

speed governing cover

41,29 was in the centre position of through hole, the left side on the left ratchet seat 3 long very heavy 44 was decontroled, long very heavy 37 interlocks in the right side on the right ratchet seat 14, and this moment, motor was middle-grade velocity of rotation; When left and right

speed governing cover

41,29 was in the left end extreme position, left and right length very heavy 44,37 was decontroled entirely, and this moment, motor was fast shelves velocity of rotation.Slowly, in, the concrete drive connection of fast third gear is as follows:

1, the transmission of slow shelves: the rotation of energising back casing 4 drives left ratchet seat 3 and rotates, 5 interlocks are enclosed with the outer sour jujube in a left side in a left side long very heavy 44, skid in a left side short very heavy 42, thereby the left very heavy axle 40 that is fixed on the left ratchet seat 3 is rotated, the rotation of the very heavy axle 40 in a left side drives the outer sour jujube circle 5 in a left side and rotates, the interlock of enclosing the groove of the boss structure of 5 end faces and gear ring 9 by sour jujube outside the left side is rotated gear ring 9 then, the rotation of gear ring 9 drives the rotation of planetary gear 8, and this moment right long very heavy 37 and right inner spinous ring 10 interlocks, right weak point very heavy 34 encloses 11 interlocks with right outer sour jujube, but because in the effect of jin, right outer sour jujube circle 11 skids, and right inner spinous ring 10 rotates, and makes planet carrier 7 do retarded motion, thereby makes the transmission of the slow shelves of right ratchet seat 14 outputs.

2, middle-grade transmission: the rotation of energising back casing 4 drives left ratchet seat 3 and rotates, a left side long very heavy 44 is decontroled, the outer sour jujube circle 5 in a left side skids, a left side short very heavy 42 and left inner spinous ring 6 interlocks, the interlock of the groove of boss structure by left inner spinous ring 6 end faces and planet carrier 7 is rotated planet carrier 7 then, this moment right long very heavy 37 and right inner spinous ring 10 interlocks, right short very heavy 34 decontrol, because very heavy effect, right outer sour jujube circle 11 skids, right inner spinous ring 10 rotates, and planetary gear 8 is done rotation and revolution, thereby makes the equal rotating speed of right ratchet seat 14 outputs.

3, fast shelves transmission: the rotation of energising back casing 4 drives left ratchet seat 3 and rotates, a left side long very heavy 44 is decontroled, the outer sour jujube circle 5 in a left side skids, a left side short very heavy 42 and left inner spinous ring 6 interlocks, the interlock of the groove of boss structure by left inner spinous ring 6 end faces and planet carrier 7 is rotated planet carrier 7 then, decontrol this moment right long very heavy 37, right weak point very heavy 34 encloses 11 interlocks with right outer sour jujube, because very heavy effect, right inner spinous ring 10 skids, and right outer sour jujube circle 11 rotates, and planetary gear 8 is done rotation and revolution, gear ring 9 rotates and speedup, thereby makes the transmission of the fast shelves of right ratchet seat 14 outputs.

Claims

1, a kind of electric screw driver, comprise power control switch (46), power interface (45), by motor, the rotating gauge tap (52) of control motor rotating and the screwdriver transmission mechanism that is connected with motor that stator and rotor are formed, it is characterized in that: be provided with in the housing of described rotor (4) one can set screw swivel speed adjusting device; Described adjusting device that can set screw swivel speed comprises planetary gear mechanism, clutch and speed adjusting gear; Described planetary gear mechanism is arranged on the centre of housing (4); Described speed adjusting gear is installed on the axis (51) of motor; Described clutch is arranged on the left and right sides of planetary gear mechanism.

2, electric screw driver according to claim 1 is characterized in that: described planetary gear mechanism comprise gear ring (9), the two ends close-fitting planet alignment pin (38) on planet carrier (7) and be installed in that planet alignment pin (38) is gone up and with its planetary gear that is connected movingly (8); Described planetary gear (8) is meshed with central gear (39) and gear ring (9) respectively; Described gear ring (9) and planet carrier (7) both sides all are processed with groove.

3, electric screw driver according to claim 1 and 2, it is characterized in that: the left and right sides that described clutch is arranged on planetary gear mechanism refers to, described clutch comprises the right side long very heavy (37) that is installed on the right very heavy axle (35) and right short very heavy (34) and is installed in a left side long very heavy (44) and left weak point very heavy (42) on the very heavy axle in a left side (40); Right very heavy axle (35) and the very heavy axle in a left side (40) are separately fixed in right ratchet seat (14) and the left ratchet seat (3); Right long very heavy (37) and (10) interlock of right inner spinous ring or relieving; Right short very heavy (34) and right outer sour jujube circle (11) interlock or relieving; A left side long very heavy (44) and outer sour jujube circle (5) interlock in a left side or relieving; A left side short very heavy (42) and (6) interlock of left inner spinous ring or relieving; Be located at right inner spinous ring (10), right outer sour jujube circle (11), left inner spinous ring (6) and left outer sour jujube and enclose the boss structure on (5) end face and the mutual interlock of groove of gear ring (9) and planet carrier (7) both sides.

4, electric screw driver according to claim 3 is characterized in that: the right ratchet seat on the described clutch (14) is rotatably connected with rotor protecgulum (12) by steel ball I (13); Left ratchet seat on the described clutch (3) is connected with housing (4) interference fit; Rolling bearing II (28) is housed on the endoporus of described right ratchet seat (14) and the outer cylinder surface of axis (51) to be formed to roll and is connected; Rolling bearing I (2) is housed on the endoporus of described left ratchet seat (3) and the outer cylinder surface of axis (51) to be formed to roll and is connected.

5, electric screw driver according to claim 1 is characterized in that: described speed adjusting gear comprises the speed change knob (48) that screw (26), its right-hand member of being fixed on axis (51) right-hand member withstand on the spring I (27) on the screw (26), right pin (33), middle push rod (36), left pin (43), outer push rod (47) and be connected with outer push rod (47) from right to left successively; Described right pin (33) and left pin (43) are pressed into respectively in the right speed governing cover (29) and left speed governing cover (41) that is contained on the axis (51) after passing through hole on the axis (51); Described speed change knob (48) left part is positioned at the outside of shell (1).

6, according to claim 1 or 4 or 5 described electric screw drivers, it is characterized in that: an end of described axis (51) is fixedly connected on the hole of motor left side lid by two nut I (50); Described axis (51) other end has screwed nut II (25); Rolling bearing III (32) is housed on the endoporus of the right lid of described motor and the outer cylinder surface of right ratchet seat (14) to be formed rolling and is connected.

7, electric screw driver according to claim 5 is characterized in that: be provided with gag lever post (49) between described speed change knob (48) and the motor left side lid.

8, electric screw driver according to claim 1 is characterized in that: described screwdriver transmission mechanism comprises driving shaft (17), head-shield (21) and capping (22); Be provided with spring II (24) between described head-shield (21) and shell (1) inwall; Bearing I V (15,18) is housed on described shell (1) endoporus and driving shaft (17) outer cylinder surface to be formed to roll and is connected; Have screwdriver mounting groove (20) on the described driving shaft (17); Be provided with the steel ball II (19) that is used for fixing screwdriver (23) in the described screwdriver mounting groove (20).

9, electric screw driver according to claim 8 is characterized in that: interference fit is connected with gear I (16) on the outer cylinder surface of described driving shaft (17); Interference fit is connected with the gear II (30) that is meshed with gear I (16) on the outer cylinder surface of described right ratchet seat (14).