CN110509232A - A kind of hammer drill tool of multi-mode switching - Google Patents
A kind of hammer drill tool of multi-mode switching Download PDFInfo
- Publication number
- CN110509232A CN110509232A CN201910903478.8A CN201910903478A CN110509232A CN 110509232 A CN110509232 A CN 110509232A CN 201910903478 A CN201910903478 A CN 201910903478A CN 110509232 A CN110509232 A CN 110509232A
- Authority
- CN
- China
- Prior art keywords
- gear
- hammering
- driven gear
- overcoat
- driven
- 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.)
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- 230000000712 assembly Effects 0.000 claims abstract description 40
- 238000000429 assembly Methods 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 238000005553 drilling Methods 0.000 claims abstract description 32
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- 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
- B25F1/00—Combination or multi-purpose hand 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
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
- B28D1/146—Tools therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/26—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by impact tools, e.g. by chisels or other tools having a cutting edge
- B28D1/28—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by impact tools, e.g. by chisels or other tools having a cutting edge without cutting edge, e.g. chiseling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
A kind of hammer drill tool of multi-mode switching, including shell, with the boring assemblies and hammering component of shell cooperation, shifter assemblies, driving motor, boring assemblies and hammering component are driven by a transmission mechanism and driving motor cooperation, transmission mechanism includes driving member, nested gear set, drill driven gear, hammer driven gear, the hammering driven gear bottom surface position is higher than top side location on drilling driven gear, it hammers the distance between top surface on driven gear bottom surface and drilling driven gear and is less than the overcoat gear facewidth, hammering driven gear, the spacing between the driven gear that drills is less than the tip diameter of overcoat gear, by control shifter assemblies drive driving member stir overcoat gear in slided up and down on driving pinion and with drilling driven gear and/or hammering driven gear engage cooperation, it realizes the transmission of driving pinion and then bores Aperture member enters working condition.The design have the advantages that it is compact-sized it is light, easy switching is stable, the operation is stable shake it is small.
Description
Technical field
The present invention relates to hammer drill field of tool, especially a kind of hammer drill tool of multi-mode switching.
Background technique
With the continuous development of electromechanical equipment, work of the electric tools such as electric drill because of its high working efficiency and using flexible
Make characteristic, is more and more applied in civil construction work.Currently in order to carry out the higher concrete of intensity or quality compared with
The punching of hard building material surface all relatively mostly uses electric hammer or electric drill to carry out operation respectively, needs replacing tool halfway now,
It is more troublesome and wastes the valuable working time.Existing electric drill or electric hammer are all the biographies that driving motor is carried out by clutch
Dynamic, the volume of clutch is larger heavier, but also some other components is needed to be cooperated, and integral device is more heavy, makes
With work phase to inconvenience, and since components are relatively more, switch also more laborious, components during switching
Loss it is also larger, on the other hand, in existing some drilling devices, be by adjust motor position carry out cooperation transmission and
Gear shift, it is more laborious and be to loosen since above-mentioned design causes motor that this results in gear shift during switching, in high speed
The vibration of whole drilling device is also larger in the state of operating, it is difficult to use, handling is poor and can bring certain operation
Risk.
Summary of the invention
The purpose of the present invention is to provide it is a kind of it is compact-sized it is light, easy switching is stable, the operation is stable vibration is small, can
The hammer drill tool for the multi-mode switching that punching can hammer again.
In order to solve the above-mentioned technical problem, the invention adopts the following technical scheme: a kind of multi-mode switching hammer drill tool,
Including shell, the boring assemblies cooperated with shell and hammering component, the shifter assemblies on shell, the driving in shell
Motor, the boring assemblies and hammering component are driven by a transmission mechanism and driving motor cooperation, and the transmission mechanism includes
One end connect the driving member of cooperation with shifter assemblies, one end and driving motor connect the nested gear set of cooperation transmission, drilling from
Moving gear, hammering driven gear, the drilling driven gear, hammering driven gear are mutually independent to be arranged by nested gear set
Side simultaneously connect cooperation with boring assemblies, hammering component respectively, and the nesting gear set includes that one end and driving motor cooperation are driven
Pillar master gear, to be nested in pillar master gear outer and drive the overcoat gear that can slide up and down along axis of a cylinder, In by driving member
On vertical direction, the hammering driven gear bottom surface position is higher than top side location on drilling driven gear, hammers driven gear
The distance between top surface is less than the overcoat gear facewidth on bottom surface and drilling driven gear, drill shelves when, shifter assemblies pass through biography
Moving part stirs overcoat gear and is snapped down to pillar master gear lower section and individually engages with drilling driven gear, is passed through by pillar master gear
Overcoat gear transmission drives boring assemblies to realize boring work；When hammering shelves, shifter assemblies stir overcoat gear by driving member
On slide to pillar master gear upper section and with hammering driven gear individually engage, pillar master gear by overcoat gear transmission drive hammer into shape
It hits component and realizes hammering work；In hammer drill shelves, shifter assemblies are stirred overcoat gear by driving member and are moved in pillar master gear
Section, and overcoat gear and drilling driven gear, hammering driven gear are meshing relation, pass through overcoat gear by pillar master gear
Transmission drives boring assemblies and hammering component operation respectively, realizes drilling and hammering.
Further, the hammering component is nested in boring assemblies.
Further, the driving member clamps overcoat gear upper and lower surface and is provided with and runs jointly with matching for pillar master gear cooperation
Mouthful.
Further, the driving motor upper top is fixed with a slide bar parallel with pillar master gear axis of a cylinder, institute
Driving member is stated equipped with through-hole, the slide bar passes through through-hole and limits driving member and moves up and down in slide bar, and the driving member passes through
The cooperation of slide bar and through-hole drives overcoat gear to move up and down and carries out the switching of working condition.
Further, the hammering component includes eccentric group, and the eccentric group includes an eccentric wheel and eccentric gearing
Axis, the hammering driven gear are fixedly connected with eccentric wheel, the eccentric wheel and eccentric drive shaft cooperating, the housing tooth
The rotate driving hammering driven gear rotation of wheel, and then eccentric wheel drives eccentric drive shaft to be driven and carry out hammering work.
The beneficial effects of the present invention are: the present invention drives overcoat gear by the driving member that shift assembly controls and is set to outer
The drilling driven gear of sleeve gear side and the engagement cooperation for hammering driven gear, realize the flexible switching of three kinds of working conditions,
For the fit applications of gear and gear instead of the application of clutch in the prior art, whole hammer drill tool volume is more small and exquisite light
Be full of, connection cooperation it is more stable, it is not easy to make mistakes, carry out in the vertical direction hammering driven gear and drill driven gear between away from
From control effectively avoid the problem that hammering driven gear, drilling driven gear and overcoat gear between can not cooperating, really
Protecting three can be carried out the switching stabilization of three kinds of working conditions and is not easy in the case where control overcoat gear single component movement
It breaks down, drives the design transmission of overcoat gear and switching mode more direct by the driving member that shift assembly controls, cut
Change easy and convenient, reduce retardance sense common in handoff procedure in the prior art, whole transmission is simple, it is necessary to cooperation components
Less, assembly is also simple, after assembly components are greatly reduced, the light-weight and lower production costs of whole hammer drill tool,
On the other hand, the present invention is to realize overcoat gear and drilling driven tooth in sliding up and down on pillar master gear by overcoat gear
The cooperation transmission of wheel and hammering driven gear, the vibration of driving motor is smaller compared to existing most of drilling devices, whole
The vibrating noise of hammer drill tool also significantly becomes smaller, and the handover operation of three kinds of working methods of whole hammer drill tool is convenient, operability
It is stronger, existing some drilling devices are also compared, operator is safer in use, unexpected thing is less likely to occur
Therefore.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of the hammer drill tool of multi-mode switching.
Fig. 2 is that Fig. 1 removes the overall structure diagram after part-structure.
Fig. 3 is the cooperation schematic diagram that Fig. 1 removes nested gear and drilling driven gear after part-structure.
Fig. 4 is the cooperation schematic diagram that Fig. 1 removes nested gear and hammering driven gear after part-structure.
Fig. 5 is the cooperation signal of nested gear and drilling driven gear and hammering driven gear after Fig. 1 dismounting part-structure
Figure.
The parts title of number expression is as follows in attached drawing: 1, transmission mechanism；1.1, nested gear set；1.11, pillar master
Gear；1.12, overcoat gear；1.2, driving member；1.3, drill driven gear；1.4, driven gear is hammered；3, boring assemblies；4,
Hammer component；5, shifter assemblies；6, driving motor；6.1, slide bar.
Specific embodiment
In order to enable the technological means that the present invention realizes, character of innovation are apparent to function, it is further illustrated below
The present invention.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 and Fig. 5, the technical solution of the hammer drill tool of multi-mode switching of the present invention, including
Shell, the boring assemblies 3 cooperated with shell and hammering component 4, the shifter assemblies 5 on shell, the driving in shell
Motor 6, the boring assemblies 3 and hammering component 4 are driven by a transmission mechanism 1 and the cooperation of driving motor 6, the transmission mechanism
1 includes the nested gear that one end connect the driving member 1.2 of cooperation with shifter assemblies 5, one end connects cooperation transmission with driving motor 6
Group 1.1, drilling driven gear 1.3, hammering driven gear 1.4, the drilling driven gear 1.3, hammering driven gear 1.4 are mutual
Independent be arranged connect cooperation, the nested gear with boring assemblies 3, hammering component 4 in nested 1.1 side of gear set and respectively
Group 1.1 includes the pillar master gear 1.11 of one end and the cooperation transmission of driving motor 6, is nested in outside pillar master gear 1.11 and by passing
Moving part 1.2 drives the overcoat gear 1.12 that can slide up and down along axis of a cylinder, in the vertical direction, the hammering driven gear 1.4
Bottom surface position is higher than top side location on drilling driven gear 1.3, hammering 1.4 bottom surface of driven gear and drilling driven gear
The distance between top surface is less than 1.12 facewidth of overcoat gear on 1.3, drill shelves when, shifter assemblies 5 are stirred outer by driving member 1.2
Sleeve gear 1.12 is snapped down to 1.11 lower section of pillar master gear and individually engages with drilling driven gear 1.3, by pillar master gear
1.11 drive boring assemblies 3 to realize boring work by the transmission of overcoat gear 1.12；When hammering shelves, shifter assemblies 5 pass through transmission
Part 1.2, which is stirred, to be slided to 1.11 upper section of pillar master gear and individually engages with hammering driven gear 1.4, pillar on overcoat gear 1.12
Master gear 1.11 drives hammering component 4 to realize hammering work by the transmission of overcoat gear 1.12；In hammer drill shelves, shifter assemblies 5
Overcoat gear 1.12 is stirred by driving member 1.2 and moves to 1.11 middle section of pillar master gear, and overcoat gear 1.12 and drilling are driven
Gear 1.3, hammering driven gear 1.4 are meshing relation, are driven respectively by pillar master gear 1.11 by overcoat gear 1.12
It drives boring assemblies 3 and hammering component 4 to work, realizes drilling and hammering.
In the present invention, in order to further reduce the volume of hammer drill tool, also to hammering component 4 and boring assemblies 3 into
Nested design is gone, i.e., the described hammering component 4 is nested in boring assemblies 3, this design makes to hammer component 4 and boring assemblies 3
The housing interior volume of occupancy is minimum, makes full use of the space of interior of shell, improves space utilization rate, reduces hammer drill tool
Whole volume, keeps it more portable, use also it is more convenient smoothly.
In the present invention, it in order to not influence the normal transmission of overcoat gear 1.12, uses driving member 1.2 and clamps housing tooth
The design for taking turns 1.12 upper and lower surfaces can also steadily make overcoat gear in the case where not influencing the normally transmission of overcoat gear 1.12
1.12 carry out working condition switching multiple for a long time under the clamping of driving member 1.2, in addition, in order to be passed more stablely
The transmission of moving part 1.2, the cooperation opening being arranged on driving member 1.2 make driving member 1.2 it is whole more stablely with pillar master gear
1.11 cooperations, will not be subjected to displacement the phenomenon that loosening after working long hours.
In order to ensure driving member 1.2 can be moved up and down like clockwork and overcoat gear 1.12 is driven to slide up and down,
6 upper top of driving motor is fixed with a slide bar 6.1 parallel with 1.11 axis of a cylinder of pillar master gear, the driving member
1.2 are equipped with through-hole, and the slide bar 6.1 passes through through-hole and limits driving member 1.2 and moves up and down in slide bar 6.1, the driving member
1.2 drive overcoat gear 1.12 to move up and down by the cooperation of slide bar 6.1 and through-hole carries out the switching of working condition.
In one embodiment of the invention, the hammering component 4 includes eccentric group, and the eccentric group includes one inclined
Heart wheel and eccentric drive shaft, the hammering driven gear 1.4 are fixedly connected with eccentric wheel, and the eccentric wheel and eccentric drive shaft are matched
Work is closed, the rotate driving hammering driven gear 1.4 of the overcoat gear 1.12 rotates, and then eccentric wheel drives eccentric drive shaft
It is driven and is carried out hammering work, the transmission that eccentric group carries out hammering component 4 enables the transmission of hammering driven gear 1.4 more
It steadily carries out for convenience, simplifies drive mechanism and transmission mode, simplify the structure of whole hammer drill tool.
Although the present invention is disclosed as above with specific embodiment, it is not intended to limit the invention, any this field
Technical staff still can make some changes and embellishment, therefore this hair without departing from the spirit and scope of the present invention
Bright protection scope should regard subject to the range institute defender of appended claims.
Claims (8)
1. a kind of hammer drill tool of multi-mode switching, it is characterised in that: including shell, with the boring assemblies (3) of shell cooperation and
Hammer component (4), the shifter assemblies (5) on shell, the driving motor (6) in shell, the boring assemblies (3) and
It hammers component (4) to be driven by a transmission mechanism (1) and driving motor (6) cooperation, the transmission mechanism (1) includes one end and change
Shelves component (5) connects the driving member (1.2) of cooperation, one end connects the nested gear set of cooperation transmission with driving motor (6)
(1.1), it drills driven gear (1.3), hammering driven gear (1.4), the drilling driven gear (1.3), hammering driven gear
(1.4) mutually independent be arranged in nested gear set (1.1) side and respectively with boring assemblies (3), hammering component (4) connect and matches
It closes, the nesting gear set (1.1) includes the pillar master gear (1.11) of one end and driving motor (6) cooperation transmission, is nested in
Pillar master gear (1.11) drives the overcoat gear (1.12) that can slide up and down along axis of a cylinder outside and by driving member (1.2), perpendicular
Histogram is upward, and hammering driven gear (1.4) the bottom surface position is higher than top side location in drilling driven gear (1.3), hammering
The distance between top surface is less than overcoat gear (1.12) facewidth on driven gear (1.4) bottom surface and drilling driven gear (1.3),
When drilling shelves, shifter assemblies (5) are stirred overcoat gear (1.12) by driving member (1.2) and are snapped down under pillar master gear (1.11)
Duan Bingyu drills, and driven gear (1.3) are independent to engage, and is driven by pillar master gear (1.11) by overcoat gear (1.12) transmission
Boring assemblies (3) realize boring work；When hammering shelves, shifter assemblies (5) stir overcoat gear (1.12) by driving member (1.2)
On slide to pillar master gear (1.11) upper section and with hammering driven gear (1.4) individually engage, pillar master gear (1.11) passes through
Overcoat gear (1.12) transmission drives hammering component (4) to realize hammering work；In hammer drill shelves, shifter assemblies (5) pass through transmission
Part (1.2) stirs overcoat gear (1.12) and moves to pillar master gear (1.11) middle section, and overcoat gear (1.12) and drilling are driven
Gear (1.3), hammering driven gear (1.4) are meshing relation, pass through overcoat gear (1.12) by pillar master gear (1.11)
Transmission drives boring assemblies (3) and hammering component (4) work respectively, realizes drilling and hammering.
2. a kind of hammer drill tool of multi-mode switching according to claim 1, it is characterised in that: the hammering component (4)
It is nested in boring assemblies (3).
3. a kind of hammer drill tool of multi-mode switching according to claim 1 or 2, it is characterised in that: the driving member
(1.2) it clamps overcoat gear (1.12) upper and lower surface and is provided with and be open with the cooperation of pillar master gear (1.11) cooperation.
4. a kind of hammer drill tool of multi-mode switching according to claim 1 or 2, it is characterised in that: the driving motor
(6) upper top is fixed with a slide bar (6.1) parallel with pillar master gear (1.11) axis of a cylinder, on the driving member (1.2)
Equipped with through-hole, the slide bar (6.1) passes through through-hole and limits driving member (1.2) and moves up and down in slide bar (6.1), the driving member
(1.2) it drives overcoat gear (1.12) to move up and down by the cooperation of slide bar (6.1) and through-hole and carries out the switching of working condition.
5. a kind of hammer drill tool of multi-mode switching according to claim 3, it is characterised in that: the driving motor (6)
Upper top is fixed with a slide bar parallel with pillar master gear (1.11) axis of a cylinder (6.1), and the driving member (1.2) is equipped with
Through-hole, the slide bar (6.1) pass through through-hole and limit driving member (1.2) and move up and down in slide bar (6.1), the driving member
(1.2) it drives overcoat gear (1.12) to move up and down by the cooperation of slide bar (6.1) and through-hole and carries out the switching of working condition.
6. a kind of hammer drill tool of multi-mode switching described according to claim 1 or 2 or 5, it is characterised in that: the hammering group
Part (4) includes eccentric group, and the eccentric group includes an eccentric wheel and eccentric drive shaft, the hammering driven gear (1.4)
It is fixedly connected with eccentric wheel, the eccentric wheel and eccentric drive shaft cooperating, the rotate driving of the overcoat gear (1.12)
Driven gear (1.4) rotation is hammered, and then eccentric wheel drives eccentric drive shaft to be driven and carry out hammering work.
7. a kind of hammer drill tool of multi-mode switching according to claim 3, it is characterised in that: the hammering component (4)
Including eccentric group, the eccentric group includes an eccentric wheel and eccentric drive shaft, the hammering driven gear (1.4) and bias
Wheel is fixedly connected, the eccentric wheel and eccentric drive shaft cooperating, the hammering of the rotate driving of the overcoat gear (1.12) from
Moving gear (1.4) rotation, and then eccentric wheel drives eccentric drive shaft to be driven and carry out hammering work.
8. a kind of hammer drill tool of multi-mode switching according to claim 4, it is characterised in that: the hammering component (4)
Including eccentric group, the eccentric group includes an eccentric wheel and eccentric drive shaft, the hammering driven gear (1.4) and bias
Wheel is fixedly connected, the eccentric wheel and eccentric drive shaft cooperating, the hammering of the rotate driving of the overcoat gear (1.12) from
Moving gear (1.4) rotation, and then eccentric wheel drives eccentric drive shaft to be driven and carry out hammering work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910903478.8A CN110509232A (en) | 2019-09-24 | 2019-09-24 | A kind of hammer drill tool of multi-mode switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910903478.8A CN110509232A (en) | 2019-09-24 | 2019-09-24 | A kind of hammer drill tool of multi-mode switching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110509232A true CN110509232A (en) | 2019-11-29 |
Family
ID=68633542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910903478.8A Pending CN110509232A (en) | 2019-09-24 | 2019-09-24 | A kind of hammer drill tool of multi-mode switching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110509232A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122332A (en) * | 2006-08-09 | 2008-02-13 | 苏州宝时得电动工具有限公司 | Three function electric hammer gearbox and its assembly method |
| WO2011088632A1 (en) * | 2010-01-21 | 2011-07-28 | 浙江海王电器有限公司 | Heavy double–button type multifunctional electric hammer |
| CN102431013A (en) * | 2011-09-13 | 2012-05-02 | 南京久驰机电实业有限公司 | Electric drill with driving mode switching |
| DE102012202774A1 (en) * | 2012-02-23 | 2013-08-29 | Robert Bosch Gmbh | Transmission device for e.g. drilling hammer for transmission of drive movement of electromotor on shaft of rammer device, has actuator for moving gear wheel in two shift positions, where gear wheel is designed as drive pinion of motor unit |
| CN210650548U (en) * | 2019-09-24 | 2020-06-02 | 吴世清 | Multi-mode switching hammer drill tool |
-
2019
- 2019-09-24 CN CN201910903478.8A patent/CN110509232A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122332A (en) * | 2006-08-09 | 2008-02-13 | 苏州宝时得电动工具有限公司 | Three function electric hammer gearbox and its assembly method |
| WO2011088632A1 (en) * | 2010-01-21 | 2011-07-28 | 浙江海王电器有限公司 | Heavy double–button type multifunctional electric hammer |
| CN102431013A (en) * | 2011-09-13 | 2012-05-02 | 南京久驰机电实业有限公司 | Electric drill with driving mode switching |
| DE102012202774A1 (en) * | 2012-02-23 | 2013-08-29 | Robert Bosch Gmbh | Transmission device for e.g. drilling hammer for transmission of drive movement of electromotor on shaft of rammer device, has actuator for moving gear wheel in two shift positions, where gear wheel is designed as drive pinion of motor unit |
| CN210650548U (en) * | 2019-09-24 | 2020-06-02 | 吴世清 | Multi-mode switching hammer drill tool |
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