US20080214097A1 - Handheld electric grinder - Google Patents
Handheld electric grinder Download PDFInfo
- Publication number
- US20080214097A1 US20080214097A1 US11/681,204 US68120407A US2008214097A1 US 20080214097 A1 US20080214097 A1 US 20080214097A1 US 68120407 A US68120407 A US 68120407A US 2008214097 A1 US2008214097 A1 US 2008214097A1
- Authority
- US
- United States
- Prior art keywords
- shell body
- handheld electric
- electric grinder
- adapter
- speed
- 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.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
-
- 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
- B25F3/00—Associations of tools for different working operations with one portable power-drive means; Adapters therefor
Definitions
- the operation manner of the above handheld electric grinder is illustrated below.
- the user determines whether to plug the power cord 44 of the handheld electric grinder with a power socket or not.
- the user controls the on/off state of the switch 38 to drive the electric motor 30 to rotate.
- the electric motor 30 rotates to generate a first rotating speed.
- the handheld electric grinder can be applied in different situations.
Abstract
A handheld electric grinder comprises a first shell body and a second shell body. The first shell body contains an electric motor therein, and is connected to the electric motor via a drive shaft. The electric motor is driven to let the drive shaft generate a first rotating speed. A first adapter is disposed at one end of the drive shaft. The first adapter can be directly connected with accessories such as hexagonal socket, screwdriver, brush and electric grinding head, or can be connected with a connector of a speed-change gear set in the second shell body. After the speed-change gear set changes the first rotating speed to a second rotating speed, a driven shaft outputs the second rotating speed. The first adapter and the second adapter can be connected with accessories such as hexagonal socket, screwdriver, brush and electric grinding head.
Description
- 1. Field of the invention
- The present invention relates to a handheld electric grinder and, more particularly, to multifunction handheld electric grinder.
- 2. Description of Related art
- As shown in
FIG. 1 , a conventional handheldelectric grinder 12 is a common tool, and is primarily used in polishing. Most conventional handheld electric grinders are of high rotating speeds. In order to allow handheld electric grinders to possess various polishing speeds, some conventional handheld electric grinders have an adjustment button to control the rotating speed. - However, conventional handheld electric grinders can only be used in polishing, but cannot apply to other fields because of their mechanism design. In order to expand the application range of handheld electric grinders so that they can deal with more diversified jobs, the present invention aims to provide an improved handheld electric grinder.
- An object of the present invention is to provide a handheld electric grinder, in which a mechanism is externally joined on the main body thereof. This mechanism is joined on the surface of the main body of the handheld electric grinder by means of screw fitting, snap fitting, or button fitting to enhance the joining strength between them.
- Another object of the present invention is to provide a handheld electric grinder, which makes use of a speed-change gear set to output different rotating speeds by changing the rotating speed of a drive shaft so as to match various front-end accessories, thereby saving the cost.
- Yet another object of the present invention is to provide a handheld electric grinder, which makes use of a push-button device to control the rotation of a drive shaft. Before changing the front-end accessory, the user can apply a force to the push-button device to let the drive shaft be unable to rotate. The user can then successfully detach and replace the front-end accessory.
- To achieve the above objects, the present invention provides a handheld electric grinder, which comprises a first shell body and a second shell body. The first shell body contains an electric motor and a rechargeable battery area therein, and is connected to the electric motor via a drive shaft. The electric motor is driven to let the drive shaft generate a first rotating speed. A first adapter is disposed at one end of the drive shaft. The first adapter can be directly connected with accessories such as electric grinding head and brush, or can be connected with a connector of a speed-change gear set in the second shell body. After the speed-change gear set changes the first rotating speed to a second rotating speed, a driven shaft outputs the second rotating speed. The first adapter and the second adapter can be connected with accessories such as hexagonal socket, screwdriver, brush and electric grinding head.
- The first shell body and the second shell body have a first connection portion and a second connection portion thereon, respectively. The first connection portion and the second connection portion are connected together by means of one or the combination of two of button fitting, snap fitting, and screw fitting to enhance the joining strength between them. A push-button device is disposed on the first shell body to control the rotation of the drive shaft. Before changing the front-end accessory, the user can apply a force to the push-button device to let the drive shaft be unable to rotate. The user can then successfully detach and replace the front-end accessory.
- The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:
-
FIG. 1 is a diagram of a handheld electric grinder in the prior art; -
FIG. 2 is a perspective view of a handheld electric grinder of the present invention; -
FIG. 3 is a cross-sectional view of a handheld electric grinder of the present invention; -
FIG. 4 is a cross-sectional view of the front section of a handheld electric grinder of the present invention; -
FIG. 5 is a cross-sectional view of the rear section of a handheld electric grinder of the present invention; and -
FIG. 6 is a perspective view of a handheld electric grinder according to another embodiment of the present invention. -
- 22: first shell body
- 24: second shell body
- 26: first connection portion
- 28: second connection portion
- 30: electric motor
- 32: drive shaft
- 34: first adapter
- 36: fan
- 38: switch
- 40: battery area
- 42: battery
- 44: power cord
- 46: AC/DC adapter
- 48: connector
- 50: speed-change gear set
- 52: driven shaft
- 54: second adapter
- 58: positioning hole
- 60: push-button device
- 62: elastic component
- 64: screw-fitting device
- As shown in
FIGS. 2 and 3 , a handheld electric grinder of the present invention comprises a first shell body 22 (front-end part) and a second shell body (rear-end part). Afirst connection portion 26 is disposed on the surface of thefirst shell body 22. Asecond connection portion 28 is disposed on the surface of thesecond shell body 24. Thefirst connection portion 26 and thesecond connection portion 28 are connected together by means of one or the combination of two of button fitting, snap fitting, and screw fitting. - Exemplified with the combination of screw fitting and snap fitting, the
first connection portion 26 includes a first thread and a first snap-fitting portion, and thesecond connection portion 28 includes a second thread and a second snap-fitting portion that match thefirst connection portion 26. When thefirst connection portion 26 and thesecond connection portion 28 are connected together, they are first screw fitted and then snap fitted together, or first snap fitted together and then screw fitted. All these variations are embraced within the scope of the invention. This kind of design can enhance the joining strength between them. - As shown in
FIG. 4 , anelectric motor 30, which can be a DC motor, is located in thefirst shell body 22. One end of adrive shaft 32 is connected with theelectric motor 30, and the other end is afirst adapter 34. Thedrive shaft 32 protrudes out of thefirst shell body 22. When theelectric motor 30 is driven to rotate, thedrive shaft 32 is led to generate a first rotating speed. Thedrive shaft 32 has a fan thereon for radiating heat. The other end of the electric motor is connected to aswitch 38, which sticks out of the outer surface of thefirst shell body 22. - A push-button device 60 is disposed on the
first shell body 22 to control the rotation of thedrive shaft 32. Before changing the front-end accessory, the user can apply a force to the push-button device 60 to let thedrive shaft 32 be unable to rotate. The user can then successfully detach and replace the front-end accessory. Anelastic component 62 is fixed on thefirst shell body 22 to support the actuation of the push-button device 60. In this embodiment, theelastic component 62 is a reed. - The
switch 38 controls whether abattery 42 placed in a battery area 40 of thefirst shell body 22 is electrically connected to theelectric motor 30 or not. Thebattery 42 can be a primary battery or a secondary battery. Thebattery 42 is used to drive theelectric motor 30. Apower cord 44 extends outwards from within the battery area 40, and an AC/DC adapter 46 is disposed on thepower cord 44. When the other end of thepower cord 44 is plugged in a power socket, thesecondary battery 42 can be recharged. When theswitch 38 is on, thebattery 42 and theelectric motor 30 are close-circuit; when theswitch 38 is off, thebattery 42 and theelectric motor 30 are open-circuit. - Moreover, the
switch 38 is connected with a locking device, which is used to lock the state of theswitch 38 to be always-on or always-off. The user can directly stir the locking device to control the state of theswitch 38. - The operation manner of the above handheld electric grinder is illustrated below. First, the user determines whether to plug the
power cord 44 of the handheld electric grinder with a power socket or not. The user then controls the on/off state of theswitch 38 to drive theelectric motor 30 to rotate. Theelectric motor 30 rotates to generate a first rotating speed. Based on the accessory connected with thefirst adapter 34, the handheld electric grinder can be applied in different situations. - The
first adapter 34 can be connected with a different front-end accessory such as electric grinding head or a brush. The shape and position of thefirst adapter 34 can vary. For instance, thefirst adapter 34 can be of a cross-groove shape, a hexagonal shape, or a circular shape. All these variations are embraced within the scope of the invention. After the components in thefirst shell body 22 are assembled, the structure can be used as a standalone handheld electric grinder. If the first rotating speed is to be changed, thesecond shell body 24 and components therein can be attached to thefirst shell body 22. Thesecond shell body 24 contains devices that can change the first rotating speed to a second rotating speed therein. - As shown in
FIG. 5 , a speed-change gear set 50 is disposed in thesecond shell body 24. Two sides of the speed-change gear set 50 are connected with aconnector 48 and a drivenshaft 52, respectively. The drivenshaft 52 protrudes out of thesecond shell body 24. Asecond adapter 54 is disposed at the other end of the drivenshaft 52. Thesecond adapter 54 is used to connect a front-end accessory such as a hexagonal socket, a screwdriver, a brush, or an electric grinding head. The speed-change gear set 50 is a planetary gear set. Apositioning hole 58 is formed on thesecond shell body 24. When the speed-change gear set 50 is arranged in thesecond shell body 24, amovable positioning clip 56 slides in thepositioning hole 58 to fix the speed-change gear set 50 with thesecond shell body 24. - When the
second shell body 24 and thefirst shell body 22 are connected together, a screw-fittingdevice 64 at the lapping position of theconnector 48 and thefirst adapter 34 is used to fix theconnector 48 and thefirst adapter 34. Because theconnector 48 laps thefirst adapter 34, the first rotating speed output by thedrive shaft 32 can be sent to the speed-change gear set 50. The speed-change gear set 50 changes the first rotating speed to the second rotating speed that is output by the drivenshaft 52. Collocated with different front-end accessories such as hexagonal socket, screwdriver, brush, and electric grinding head, the handheld electric grinder can carry out various kinds of operations. - Besides, the speed-change gear set 50 can be an accelerating gear set or a decelerating gear set. When the speed-change gear set 50 is an accelerating gear set, it increases the first rotating speed to the second rotating speed. When the speed-change gear set 50 is a decelerating gear set, it decreases the first rotating speed to the second rotating speed.
- The operation manner of the above handheld electric grinder with the rear section attached thereto is illustrated below. The user first connects the front section and the rear section of the handheld electric grinder together, and then determines whether to plug the
power cord 44 of the handheld electric grinder with a power socket or not. Next, the user controls the on/off state of theswitch 38 to drive theelectric motor 30 to rotate. Theelectric motor 30 rotates to generate a first rotating speed. Through the acceleration or deceleration of the speed-change gear set 50, the first rotating speed is changed to a second rotating speed. Thesecond adapter 54 is connected with various kinds of front-end accessories such as hexagonal socket, screwdriver, brush and electric grinding head. -
FIG. 6 is a perspective view of a handheld electric grinder according to another embodiment of the present invention. The internal structure of this embodiment is the same as that of the first embodiment. They only differ in the outer appearance and the connection manner of thefirst connection portion 26 and thesecond connection portion 28. - Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.
Claims (18)
1. A handheld electric grinder comprising:
a first shell body having a first connection portion on a surface thereof;
an electric motor located in said first shell body;
a drive shaft with one end thereof being connected with said electric motor and other end thereof being an adapter and protruding out of said first shell body, said drive shaft being used to send a first rotating speed generated by said electric motor;
a second shell body having a second connection portion thereon said first connection portion and said second connection portion being connected together;
a connector with one end thereof lapping the first adapter and other end thereof lapping a speed-change gear set located in said second shell body;
a driven shaft located on said second shell body, one end of said driven shaft lapping said speed-change gear set;
a second adapter located at other end of said driven shaft;
whereby after said first rotating speed is output by said electric motor and sent to said speed-change gear set via said drive shaft and then speed-changed by said speed-change gear set, said driven shaft outputs a second rotating speed.
2. The handheld electric grinder as claimed in claim 1 , wherein said first connection portion and said second connection portion is connected together by means of button fitting, snap fitting, screw fitting.
3. The handheld electric grinder as claimed in claim 1 , wherein said first connection portion includes a first thread and a first snap portion, and said second connection portion includes a second thread and a second snap portion matched with said first connection portion.
4. The handheld electric grinder as claimed in claim 1 , wherein a fan is disposed on said drive shaft and located between said electric motor and said connector.
5. The handheld electric grinder as claimed in claim 1 , wherein said speed-change gear set is a planetary gear set.
6. The handheld electric grinder as claimed in claim 1 , wherein said speed-change gear set increases said first rotating speed to said second rotating speed, or decreases said first rotating speed to said second rotating speed.
7. The handheld electric grinder as claimed in claim 1 , wherein a positioning hole is disposed on said second shell body, a movable positioning clip is slide in said positioning hole to fix said speed-change gear set on said second shell body.
8. The handheld electric grinder as claimed in claim 1 further comprising a push-button device, wherein said push-button device is located on said first shell body, and said drive shaft is fixed and thus cannot rotate when a pressure is applied to said push-button device.
9. The handheld electric grinder as claimed in claim 8 , wherein an elastic component is fixed on said first shell body to support actuation of said push-button device.
10. The handheld electric grinder as claimed in claim 1 , wherein said first shell body contains a battery area therein for placing a primary battery or a secondary battery.
11. The handheld electric grinder as claimed in claim 1 , wherein said first shell body is connected to a power cord, and said power cord provides electric power to drive said electric motor.
12. The handheld electric grinder as claimed in claim 11 , wherein said power cord has an AC/DC adapter.
13. The handheld electric grinder as claimed in claim 1 , wherein said electric motor is a DC motor.
14. The handheld electric grinder as claimed in claim 10 , wherein a switch sticks out of an outer surface of said first shell body, battery and said electric motor are close-circuit when said switch is on, and said battery and said electric motor are open-circuit when said switch is off.
15. The handheld electric grinder as claimed in claim 14 , wherein a locking device is disposed on the outer surface of said first shell body, and said locking device is used to lock on/off state of said switch.
16. The handheld electric grinder as claimed in claim 1 , wherein said second adapter is connected with a hexagonal socket, a screwdriver, a brush, or an electric grinding head.
17. The handheld electric grinder as claimed in claim 1 , wherein when said second shell body and said first shell body are not connected together, said first adapter is connected with an electric grinding head or a brush.
18. The handheld electric grinder as claimed in claim 1 , wherein when said second shell body and said first shell body are connected together, a screw-fitting device at lapping position of said connector and said first adapter is used to fix said connector and said first adapter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/681,204 US20080214097A1 (en) | 2007-03-02 | 2007-03-02 | Handheld electric grinder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/681,204 US20080214097A1 (en) | 2007-03-02 | 2007-03-02 | Handheld electric grinder |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080214097A1 true US20080214097A1 (en) | 2008-09-04 |
Family
ID=39733434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/681,204 Abandoned US20080214097A1 (en) | 2007-03-02 | 2007-03-02 | Handheld electric grinder |
Country Status (1)
Country | Link |
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US (1) | US20080214097A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130319706A1 (en) * | 2012-06-01 | 2013-12-05 | Covidien Lp | Hand held surgical handle assembly, surgical adapters for use between surgical handle assembly and surgical loading units, and methods of use |
CN104191337A (en) * | 2014-08-06 | 2014-12-10 | 兴化市中兴电动工具有限公司 | Shell of electric grinder |
CN105345630A (en) * | 2015-10-14 | 2016-02-24 | 哈尔滨飞机工业集团有限责任公司 | Counter-pull type polishing brush |
EP3153280A1 (en) * | 2015-10-09 | 2017-04-12 | Robert Bosch Gmbh | Tool with universal interface for an output interface |
US9801364B1 (en) * | 2016-05-03 | 2017-10-31 | Herman Miller | Knot-tying tool |
US20220071171A1 (en) * | 2020-09-10 | 2022-03-10 | Wahl Clipper Corporation | Pet nail grinder |
Citations (7)
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US4311063A (en) * | 1980-06-02 | 1982-01-19 | The Singer Company | Bearing and bearing mount and tools incorporating same |
US4895146A (en) * | 1982-01-25 | 1990-01-23 | Klaus Draenert | Surgical bone-grinding instrument |
US5643062A (en) * | 1995-05-23 | 1997-07-01 | James R. Joseph | Manicure machine |
US6715380B2 (en) * | 2001-05-14 | 2004-04-06 | C. & E. Fein Gmbh & Co. Kg | Power-driven screwdriver |
US6716095B1 (en) * | 2003-01-08 | 2004-04-06 | Techway Industrial Co., Ltd. | Cordless surface dresser |
US6912790B2 (en) * | 2001-12-03 | 2005-07-05 | Milwaukee Electric Tool Corporation | Handle arrangement for a reciprocating saw |
US7115018B1 (en) * | 2005-04-11 | 2006-10-03 | Innovative Polishing Systems, Inc. | Hand held electric polisher |
-
2007
- 2007-03-02 US US11/681,204 patent/US20080214097A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4311063A (en) * | 1980-06-02 | 1982-01-19 | The Singer Company | Bearing and bearing mount and tools incorporating same |
US4895146A (en) * | 1982-01-25 | 1990-01-23 | Klaus Draenert | Surgical bone-grinding instrument |
US5643062A (en) * | 1995-05-23 | 1997-07-01 | James R. Joseph | Manicure machine |
US6715380B2 (en) * | 2001-05-14 | 2004-04-06 | C. & E. Fein Gmbh & Co. Kg | Power-driven screwdriver |
US6912790B2 (en) * | 2001-12-03 | 2005-07-05 | Milwaukee Electric Tool Corporation | Handle arrangement for a reciprocating saw |
US6716095B1 (en) * | 2003-01-08 | 2004-04-06 | Techway Industrial Co., Ltd. | Cordless surface dresser |
US7115018B1 (en) * | 2005-04-11 | 2006-10-03 | Innovative Polishing Systems, Inc. | Hand held electric polisher |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130319706A1 (en) * | 2012-06-01 | 2013-12-05 | Covidien Lp | Hand held surgical handle assembly, surgical adapters for use between surgical handle assembly and surgical loading units, and methods of use |
US9868198B2 (en) * | 2012-06-01 | 2018-01-16 | Covidien Lp | Hand held surgical handle assembly, surgical adapters for use between surgical handle assembly and surgical loading units, and methods of use |
US20180133883A1 (en) * | 2012-06-01 | 2018-05-17 | Covidien Lp | Hand held surgical handle assembly, surgical adapters for use between surgical handle assembly and surgical loading units, and methods of use |
US10661422B2 (en) * | 2012-06-01 | 2020-05-26 | Covidien Lp | Hand held surgical handle assembly, surgical adapters for use between surgical handle assembly and surgical loading units, and methods of use |
US11633844B2 (en) | 2012-06-01 | 2023-04-25 | Covidien Lp | Hand held surgical handle assembly, surgical adapters for use between surgical handle assembly and surgical loading units, and methods of use |
CN104191337A (en) * | 2014-08-06 | 2014-12-10 | 兴化市中兴电动工具有限公司 | Shell of electric grinder |
EP3153280A1 (en) * | 2015-10-09 | 2017-04-12 | Robert Bosch Gmbh | Tool with universal interface for an output interface |
CN106944981A (en) * | 2015-10-09 | 2017-07-14 | 罗伯特·博世有限公司 | With the instrument for the general-purpose interface from mobile interface |
CN105345630A (en) * | 2015-10-14 | 2016-02-24 | 哈尔滨飞机工业集团有限责任公司 | Counter-pull type polishing brush |
US9801364B1 (en) * | 2016-05-03 | 2017-10-31 | Herman Miller | Knot-tying tool |
US20220071171A1 (en) * | 2020-09-10 | 2022-03-10 | Wahl Clipper Corporation | Pet nail grinder |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |