CN110405698A - Pattern switching mechanism and its electric tool - Google Patents
Pattern switching mechanism and its electric tool Download PDFInfo
- Publication number
- CN110405698A CN110405698A CN201810400275.2A CN201810400275A CN110405698A CN 110405698 A CN110405698 A CN 110405698A CN 201810400275 A CN201810400275 A CN 201810400275A CN 110405698 A CN110405698 A CN 110405698A
- Authority
- CN
- China
- Prior art keywords
- transfer strip
- cantilever
- switching mechanism
- pattern switching
- impact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims description 14
- 230000033001 locomotion Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D11/00—Portable percussive tools with electromotor or other motor drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
Abstract
The invention discloses one mode switching mechanism and its electric tools, the pattern switching mechanism includes: the input shaft being driven by motor, swivel sleeve, guide rod, the first transfer strip and the second transfer strip and operating parts being in U-shape, swivel sleeve is sheathed on input shaft, first transfer strip, second transfer strip is successively sheathed on the guide rod by left-to-right, and first transfer strip the second cantilever that has driving swivel sleeve mobile, there is second transfer strip driving dress to change the mobile third cantilever of sleeve, operating parts has cam pin, pattern switching mechanism further includes the tension spring being held on the first transfer strip and the second transfer strip respectively, and the cam pin is held between second cantilever and third cantilever, when pattern switching, the cam pin drives the first transfer strip or the second transfer strip that swivel sleeve is driven to move axially along input shaft.The pattern switching mechanism is conducive to simplify installation, save the cost.
Description
[technical field]
The present invention relates to field of power tools, in particular to one mode switching mechanism and its electric tool.
[background technique]
Electric tool such as electric hammer, user carry out selecting different electric hammer operating modes according to different usage scenarios.
Such as Chinese utility model is announced in No. CN202318260U and discloses a kind of transmission interpreter of electric tool
Structure, comprising: guide rod;First washer, including two first baffles and at least one first cantilever are provided on first baffle and wear
Hole, the first washer are slidably mounted on guide rod by the perforation on two first baffles, and the first cantilever is slided with the first washer;The
Two washers, including two second baffles and at least one second cantilever, are provided with perforation on second baffle, the second washer by
Perforation on two second baffles is slidably mounted on guide rod, and the second cantilever is slided with the second washer;Connect first flap
With the third baffle of second flap;And the component of transferring the files in cam shape, including it is round with vertically extending axis and first, second
Arc, axis is static relative to guide rod, and the radius of the first, second circular arc is different, and component of transferring the files is by the first circular arc and the second circular arc
Different radii drives the first washer and the second washer on guide rod along the longitudinal sliding motion of guide rod;But said mechanism uses three gears
Piece is converted with the transmission for realizing electric tool, wherein three mutual clampings of washer, and set respectively between the cantilever of the baffle
There are two spring, not only structure is complicated and installation is not easy.
It is then desired to which the pattern switching mechanism to existing electric tool improves, to simplify structure and facilitate installation.
[summary of the invention]
To solve the above problems, the present invention provides a kind of simple pattern switching mechanism of structure and its electric tool.
In order to solve the above technical problems, the present invention adopts the following technical scheme: one mode switching mechanism 101, is installed on
On the casing of electric tool, comprising: the input shaft 1 that is driven by motor, swivel sleeve 3, guide rod 4, the first transfer strip 5, second cut
Piece 6 and operating parts 7 are changed, the swivel sleeve 3 is sheathed on input shaft 1, and first transfer strip 5, the second transfer strip 6 are arranged
In on the guide rod 4, and the second cantilever 5b that first transfer strip 5 has the first cantilever 5a and drives swivel sleeve 3 mobile,
There is second transfer strip 6 driving dress to change the mobile third cantilever 6a of sleeve 3, and the operating parts 7 has cam pin 7a, described
Pattern switching mechanism 101 further includes the tension spring 8 being held on the first transfer strip 5 and the second transfer strip 6 respectively, and by the bias
Pin 7a is held between the second cantilever 5b and third cantilever 6a, and when driving operating parts 7, the cam pin 7a driving first is cut
Changing piece 5 drives the second transfer strip 6 with swivel sleeve 3 together along the axial movement of input shaft 1 or cam pin 7a driving second
Transfer strip 6 drives the first transfer strip 5 to move axially together along input shaft 1 with swivel sleeve 3.
Further improvement scheme are as follows: the swivel sleeve 3, which has, to be set between the second cantilever 5a and third cantilever 6a
Step 3a, and the thickness of the step 3a is less than the diameter of cam pin 7a, when pattern switching, the second of first transfer strip 5
The third cantilever 6a of cantilever 5b or the second transfer strip 6 is abutted with the step 3a and swivel sleeve 3 is driven to move axially.
Further improvement scheme are as follows: the left end of the tension spring 8 is held on the first cantilever 5a, the right end button of the tension spring 8
It is held on third cantilever 6a.
Further improvement scheme are as follows: the pattern switching mechanism 101 further includes the impact output 9 being sheathed on input shaft 1,
The left side of the impact output 9 is equipped with impact internal spline 9a, and the right side of the swivel sleeve 3 is equipped with engages with impact internal spline 9a
Impact external splines 3b.
Further improvement scheme are as follows: the pattern switching mechanism 101 further includes the first gear 10 being sheathed on input shaft, institute
The right side for stating first gear 10 is equipped with rotation internal spline 10a, and the left side of swivel sleeve 3 is equipped with and rotates what internal spline 10a was engaged
Rotate external splines 3c.
Further improvement scheme are as follows: the right side of the first gear 10 is additionally provided with rotation stop spline 10b, the first cantilever 5a
It is equipped with the locking part 5a ' engaged with rotation stop key spline 10b.
Further improvement scheme are as follows: mode that there are four types of the pattern switching mechanism 101 position tools different according to cam pin 7a,
When being in first mode: the swivel sleeve 3 is located at left end, and the rotation internal spline 10a is engaged with rotation external splines 3c,
The impact internal spline 9a is separated with impact external splines 3b;When in the second mode: swivel sleeve 3 from first mode position to
It moves right, the rotation internal spline 10a is engaged with rotation external splines 3c at this time, and the impact internal spline 9a and impact external splines
3b is engaged simultaneously;When being in the third mode, the swivel sleeve 3 moves right from second mode position, at this time the rotation
Internal spline 10a is separated with rotation external splines 3c, and the impact internal spline 9a is engaged with impact external splines 3b;When in fourth mode
When, the swivel sleeve 3 is located at right end, and the rotation internal spline 10a is separated with rotation external splines 3c at this time, in the impact
Spline 9a is engaged with impact external splines 3b, and rotation stop spline in the locking part 5a ' on the first cantilever 5a and first gear 10
10b engaging.
Further improvement scheme are as follows: a kind of electric tool, comprising: casing, the clamping device 11 positioned at casing front end, installation
In the transmission mechanism 100 of casing internal, the transmission mechanism 100 drives the clamping device 11 to move;The transmission mechanism 100 packet
The above-mentioned pattern switching mechanism 101 for including output shaft assembly 102 and being sequentially connected with output shaft assembly 102.
The invention has the following beneficial effects: be held in the first transfer strip, respectively using tension spring compared with prior art
On two transfer strips, operating parts has the cam pin being set between the first transfer strip, the second transfer strip, when pattern switching, institute
Stating cam pin drives the first transfer strip or the second transfer strip that swivel sleeve is driven to move axially along input shaft, wherein the first transfer strip
Swivel sleeve can not only be driven to move axially, be additionally provided with the locking part for forbidding electric tool to rotate, amounted to and use two transfer strips
The switching that four kinds of modes of electric tool can be realized is conducive to simplify installation, save the cost.In addition swivel sleeve has setting
Step between the first transfer strip and the second transfer strip, the thickness of the step is less than the diameter of cam pin, so that first cuts
Change piece and the second transfer strip and step have gap, be conducive to reduce the first transfer strip, the second transfer strip and swivel sleeve it
Between friction.
[Detailed description of the invention]
Fig. 1 is the three-dimensional view of transmission mechanism of electric tool of the present invention;
Fig. 2 is the three-dimensional view of the pattern switching mechanism in the present invention;
Fig. 3 is the top view of Fig. 2 middle sleeve component;
Fig. 4 is the cross-sectional view of Fig. 1;
100, transmission mechanism, 101, pattern switching mechanism, 102, output shaft assembly, 1, input shaft, 2, output shaft, 3, conversion
Sleeve, 3a, step, 3b, impact external splines, 3c, rotation external splines, 4, guide rod, the 5, first transfer strip, 5a, the first cantilever, 5b,
Second cantilever, the 6, second transfer strip, 6a, third cantilever, 6b, the 4th cantilever, 7, operating parts, 7a, cam pin, 8, tension spring, 9, punching
Hit output, 9a, impact internal spline, 10, first gear, 10a, rotation internal spline, 11, clamping device, 12, second gear, 13,
Cylinder, 14, block stamp.
[specific embodiment]
Below in conjunction with drawings and examples, further description of the specific embodiments of the present invention.
It please refers to shown in Fig. 1 and Fig. 4, electric tool of the invention is in the present embodiment with electric hammer for example, the electricity
Hammer include: casing (not shown), positioned at casing front end clamping device 11, be installed on the driver that casing internal is driven by motor
Structure 100, the clamping device 11 are used for clamping device head, the transmission mechanism 100 drives the clamping device 11, the biography
Motivation structure 100 includes output shaft assembly 102 and the pattern switching mechanism 101 with output shaft assembly transmission connection, and user is not according to
With usage scenario pattern switching mechanism 101 is adjusted the switchings of four kinds of modes may be implemented, be respectively: drill jig formula (also referred to as the
One mode), impact drill mode (also referred to as second mode), conflicting model (also referred to as the third mode), lock shaft conflicting model the (the also referred to as the 4th
Mode).The transmission mechanism 100 by under different mode rotation torque or impact force pass to tool heads and export.
Referring to figure 2. and shown in Fig. 3, the pattern switching mechanism 101 includes: input shaft 1, the conversion sleeve being driven by motor
Cylinder 3, guide rod 4, the first transfer strip 5 being in U-shape and the second transfer strip 6 and operating parts 7, the outbound course for defining electric hammer is left end,
The swivel sleeve 3 is sheathed on input shaft 1, and first transfer strip 5, the second transfer strip 6 are successively sheathed on institute by left-to-right
It states on guide rod 4, and first transfer strip 5 has the second cantilever 5b of the driving movement of swivel sleeve 3 and is located at the second cantilever 5b
There is driving dress to change the mobile third cantilever 6a of sleeve 3 and hang positioned at third for the first cantilever 5a in left side, second transfer strip 6
The 4th cantilever 6b on the right side of arm, the operating parts 7 have cam pin 7a, and the pattern switching mechanism 101 further includes difference clasp
Tension spring 8 on the first transfer strip 5 and the second transfer strip 6, the left end of the tension spring 8 are held on the first cantilever 5a, the drawing
The right end of spring 8 is held on third cantilever 6a, which provides opposite pretension to the first transfer strip 5, the second transfer strip 6,
Further the cam pin 7a is held between the second cantilever 5b and third cantilever 6a.The swivel sleeve 3, which has, to be set
The step 3a being placed between the second cantilever 5a and third cantilever 6a, and the thickness of the step 3a is less than the diameter of cam pin 7a,
The size design makes the first transfer strip 5 and the second transfer strip 6 and step 3a have gap, and when electric hammer works, swivel sleeve 3 is high
Speed rotation, the gap are conducive to reduce the friction between the first transfer strip, the second transfer strip and swivel sleeve.
When pattern switching, the cam pin 7a drives the first transfer strip 5 or the second transfer strip 6 to move axially along guide rod 4, into
Second cantilever 5b or third cantilever 6a described in one step is abutted with the step 3a and swivel sleeve 3 is driven to move axially.
Referring to figure 2. to shown in Fig. 4, the output shaft assembly 102 includes the output shaft for being arranged in parallel in 1 top of input shaft
2, the block stamp 14 that the second gear 12 being fixedly arranged on output shaft 2, the cylinder 13, the cylinder 13 that are slideably positioned in output shaft 2 drive,
The 13 compressed air-driven block stamp 14 of cylinder is reciprocating, which is detailed later.The pattern switching mechanism 101
It further include the impact output 9 being sheathed on above-mentioned input shaft 1 and the first gear 10 engaged with second gear, first tooth
Wheel 10, swivel sleeve 3 and impact output 9 are from left to right arranged successively on input shaft 1.The left side of the impact output 9 is set
There is impact internal spline 9a, the right side of the swivel sleeve 3 is equipped with the impact external splines 3b engaged with impact internal spline 9a;Described
The right side of one gear 10 is equipped with rotation internal spline 10a, and the left side of swivel sleeve 3 is equipped with the rotation engaged with rotation internal spline 10a
External splines 3c;When electric hammer carries out impact output, the driving of the swivel sleeve 3 impact output 9 moves back and forth, the impact
Swing rod on output 9 connect with cylinder 13 and cylinder 13 is driven to move back and forth, which simultaneously drives punching
Hammer 14 carries out impact output.When electric hammer carries out rotation output, the swivel sleeve 3 drives first gear 10 to be rotated, described
First gear 10 drives second gear 12 to be rotated, and the output shaft 2 is further driven to carry out rotation output.
The right side of the first gear 10 is additionally provided with rotation stop spline 10b, and the first cantilever 5a is equipped with and rotation stop
The locking part 5a ' of key spline 10b engagement, when electric hammer individually carries out impact output, user can be with according to different usage scenarios
Selection carries out locking to output shaft 2.
The position different according to cam pin 7a, drives first transfer strip 5, the second transfer strip 6 and swivel sleeve 3 to be in
Different positions, there are four types of modes for electric hammer tool described further, when being in drill jig formula (also referred to as first mode), the conversion sleeve
Cylinder 3 is located at left end, and the rotation internal spline 10a is engaged with rotation external splines 3c, the impact internal spline 9a and the outer flower of impact
Key 3b separation;When being in impact drill mode (also referred to as second mode), swivel sleeve 3 moves right from first mode position, this
Shi Suoshu rotates internal spline 10a and engages with rotation external splines 3c, and the impact internal spline 9a and impact external splines 3b is nibbled simultaneously
It closes;When being in conflicting model (also referred to as the third mode), the swivel sleeve 3 moves right from second mode position, at this time institute
It states rotation internal spline 10a to separate with rotation external splines 3c, the impact internal spline 9a is engaged with impact external splines 3b;When in lock
When axis conflicting model (also referred to as fourth mode), the swivel sleeve 3 is located at right end, at this time the rotation internal spline 10a and rotation
Turn external splines 3c separation, the impact internal spline 9a is engaged with impact external splines 3b, and the locking part on the first cantilever 5a
5a ' engages with rotation stop spline 10b in first gear 10.
The invention has the following beneficial effects: be held in the first transfer strip, respectively using tension spring compared with prior art
On two transfer strips, operating parts has the cam pin being set between the first transfer strip, the second transfer strip, when pattern switching, institute
Stating cam pin drives the first transfer strip or the second transfer strip that swivel sleeve is driven to move axially along input shaft, wherein the first transfer strip
Swivel sleeve can not only be driven to move axially, be additionally provided with the locking part for forbidding electric tool to rotate, amounted to and use two transfer strips
The switching that four kinds of modes of electric tool can be realized is conducive to simplify installation, save the cost.In addition swivel sleeve has setting
Step between the first transfer strip and the second transfer strip, the thickness of the step is less than the diameter of cam pin, so that first cuts
Change piece and the second transfer strip and step have gap, be conducive to reduce the first transfer strip, the second transfer strip and swivel sleeve it
Between friction.
The present invention is not limited to above-mentioned specific embodiment, and protection scope of the present invention is with the content of claims
It is quasi-.
Claims (8)
1. one mode switching mechanism (101), is installed on the casing of electric tool, comprising:
Input shaft (1), swivel sleeve (3), guide rod (4), the first transfer strip (5), the second transfer strip (6) and the behaviour being driven by motor
Workpiece (7), the swivel sleeve (3) are sheathed on input shaft (1), and first transfer strip (5), the second transfer strip (6) cover
On the guide rod (4), and first transfer strip (5) has the first cantilever (5a) and drives swivel sleeve (3) movement
There is driving dress to change sleeve (3) mobile third cantilever (6a) for second cantilever (5b), second transfer strip (6),
It is characterized by: the operating parts (7) has cam pin (7a), the pattern switching mechanism (101) further includes detaining respectively
The tension spring (8) being held on the first transfer strip (5) and the second transfer strip (6), and the cam pin (7a) is held on described second
Between cantilever (5b) and third cantilever (6a), when driving operating parts (7), the cam pin (7a) drives the first transfer strip (5) band
Dynamic second transfer strip (6) and swivel sleeve (3) are together along input shaft (1) axial movement or the cam pin (7a) driving second
Transfer strip (6) drives the first transfer strip (5) and swivel sleeve (3) to move axially together along input shaft (1).
2. pattern switching mechanism (101) according to claim 1, it is characterised in that: the swivel sleeve (3) has setting
Step (3a) between the second cantilever (5a) and third cantilever (6a), and the thickness of the step (3a) is less than cam pin (7a)
Diameter, when pattern switching, the second cantilever (5b) of first transfer strip (5) or the third cantilever of the second transfer strip (6)
(6a) squeezes the step (3a) and swivel sleeve (3) is driven to move axially.
3. pattern switching mechanism (101) according to claim 1, it is characterised in that: the left end of the tension spring (8) is held in
On first cantilever (5a), the right end of the tension spring (8) is held on third cantilever (6a).
4. pattern switching mechanism (101) according to claim 2, it is characterised in that: the pattern switching mechanism (101) is also wrapped
The impact output (9) being sheathed on input shaft (1) is included, the left side of the impact output (9) is equipped with impact internal spline (9a), institute
The right side for stating swivel sleeve (3) is equipped with the impact external splines (3b) engaged with impact internal spline (9a).
5. pattern switching mechanism (101) according to claim 4, it is characterised in that: the pattern switching mechanism (101) is also wrapped
The first gear (10) being sheathed on input shaft is included, the right side of the first gear (10) is equipped with rotation internal spline (10a), conversion
The left side of sleeve (3) is equipped with the rotation external splines (3c) engaged with rotation internal spline (10a).
6. pattern switching mechanism (101) according to claim 5, it is characterised in that: the right side of the first gear (10)
It is additionally provided with rotation stop spline (10b), first cantilever (5a) is equipped with the locking part (5a ') engaged with rotation stop key spline (10b).
7. pattern switching mechanism (101) according to claim 6, it is characterised in that: the pattern switching mechanism (101) according to
According to the different position tool of cam pin (7a), there are four types of modes, and first mode: the swivel sleeve (3) is located at left end, the rotation
Turn internal spline (10a) to engage with rotation external splines (3c), the impact internal spline (9a) separates with impact external splines (3b);Second
Mode: swivel sleeve (3) moves right from first mode position, at this time the rotation internal spline (10a) and rotation external splines
(3c) engagement, and the impact internal spline (9a) is engaged simultaneously with impact external splines (3b);The third mode, the swivel sleeve
(3) it moves right from second mode position, the rotation internal spline (10a) separates with rotation external splines (3c) at this time, the punching
Internal spline (9a) is hit to engage with impact external splines (3b);Fourth mode, the swivel sleeve (3) are located at right end, described at this time
Rotation internal spline (10a) is separated with rotation external splines (3c), and the impact internal spline (9a) is engaged with impact external splines (3b), and
Locking part (5a ') on first cantilever (5a) engages with rotation stop spline (10b) on first gear (10).
8. a kind of electric tool, comprising: casing, positioned at casing front end clamping device (11), be installed on the transmission of casing internal
Mechanism (100), the transmission mechanism (100) drive clamping device (11) movement;It is characterized by: the transmission mechanism
It (100) include output shaft assembly (102) and the pattern switching mechanism (101) with output shaft assembly (102) transmission connection, the mould
Formula switching mechanism (101) has technical characteristic described in any one of claim 1 to 7 claim.
Priority Applications (1)
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CN201810400275.2A CN110405698A (en) | 2018-04-28 | 2018-04-28 | Pattern switching mechanism and its electric tool |
Applications Claiming Priority (1)
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CN201810400275.2A CN110405698A (en) | 2018-04-28 | 2018-04-28 | Pattern switching mechanism and its electric tool |
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CN110405698A true CN110405698A (en) | 2019-11-05 |
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ID=68357312
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CN201810400275.2A Pending CN110405698A (en) | 2018-04-28 | 2018-04-28 | Pattern switching mechanism and its electric tool |
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JP2007237355A (en) * | 2006-03-09 | 2007-09-20 | Makita Corp | Work tool |
CN202073949U (en) * | 2011-05-30 | 2011-12-14 | 博世电动工具(中国)有限公司 | Clutch for electric tool and electric tool with same |
CN102794751A (en) * | 2011-05-23 | 2012-11-28 | 博世电动工具(中国)有限公司 | Electric tool and transmission switching mechanism thereof |
CN104786199A (en) * | 2014-11-07 | 2015-07-22 | 江苏东成机电工具有限公司 | Mode switching device |
CN106041834A (en) * | 2016-06-21 | 2016-10-26 | 刘志斌 | Electric tool and mode switching structure thereof |
CN107336199A (en) * | 2017-08-01 | 2017-11-10 | 江苏东成机电工具有限公司 | Multifunctional electric hammer |
CN208880631U (en) * | 2018-04-28 | 2019-05-21 | 江苏东成机电工具有限公司 | Pattern switching mechanism and its electric tool |
-
2018
- 2018-04-28 CN CN201810400275.2A patent/CN110405698A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007237355A (en) * | 2006-03-09 | 2007-09-20 | Makita Corp | Work tool |
CN102794751A (en) * | 2011-05-23 | 2012-11-28 | 博世电动工具(中国)有限公司 | Electric tool and transmission switching mechanism thereof |
CN202073949U (en) * | 2011-05-30 | 2011-12-14 | 博世电动工具(中国)有限公司 | Clutch for electric tool and electric tool with same |
CN104786199A (en) * | 2014-11-07 | 2015-07-22 | 江苏东成机电工具有限公司 | Mode switching device |
CN106041834A (en) * | 2016-06-21 | 2016-10-26 | 刘志斌 | Electric tool and mode switching structure thereof |
CN107336199A (en) * | 2017-08-01 | 2017-11-10 | 江苏东成机电工具有限公司 | Multifunctional electric hammer |
CN208880631U (en) * | 2018-04-28 | 2019-05-21 | 江苏东成机电工具有限公司 | Pattern switching mechanism and its electric tool |
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