GB2396127A - Dual output power tool - Google Patents
Dual output power tool Download PDFInfo
- Publication number
- GB2396127A GB2396127A GB0229221A GB0229221A GB2396127A GB 2396127 A GB2396127 A GB 2396127A GB 0229221 A GB0229221 A GB 0229221A GB 0229221 A GB0229221 A GB 0229221A GB 2396127 A GB2396127 A GB 2396127A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gear
- rotation
- tool
- axis
- motor
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
-
- 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
- B25F5/02—Construction of casings, bodies or handles
Abstract
A power tool such as a powered screw driver comprising a body 2 a motor mounted within the body capable of rotatingly driving at least one tool holder, for example a hex socket for a screw driver bit, mounted on the body characterised in that there is provided at least two tool holders 10, 16 mounted on the body which are rotationally driven by the motor. The two tool holders are rotationally driven by the motor simultaneously and their axes of rotation 12, 14 of the tool holders are fixed in relation to the body. The axis of rotation 14 of the first tool holder 10 is perpendicular to the axis of rotation 12 of the second tool holder 16, the body 2 comprises a longitudinal axis 14 and the axis of rotation 14 of one of the tool holders 16 is parallel and co-axial to the longitudinal axis 14 of the body 2. The two tool holders are rotationally driven by the electric motor via a gear mechanism comprising a first bevel gear 20 rotatingly driven by the motor; a second bevel gear 22 rotatingly driven by the first gear 20 and which rotationally drives one of the tool holders 10; and a third bevel gear 24 rotatingly driven by the second gear 22 and which rotatingly drives the second tool holder 16.
Description
MULTI DRIVE POWER TOOL
Powered screwdrivers are well known. Powered screwdrivers comprise an electric motor mounted within an elongate body which rotatingly drives a hex socket in which can be inserted a screw driver bit. The motor rotatingly drives the hex socket and hence any screw driver bit located within it. The motor is usually powered 5 by a battery which is mounted on the powered screw driver. The position of the hex drive can be fixed in relation to the body of the powered screw driver. However, this makes the use of the powered screw driver difficult in certain locations as the shape of the body of the powered screw driver sometimes prevents the powered screw driver being angled at certain orientations due to an object being located within the 10 vicinity of the area where the user would like to use the powered screw driver.
In order to overcome the above problem, certain designs of powered screw driver have a head which is pivotally mounted onto the body using a pivot mechanism. The electric motor and battery are mounted within the body. The 15 rotatable hex socket is mounted on the pivotable head. Gear means are provided by which the rotational output of the electric motor is transferred across the pivot mechanism to the rotatable hex socket mounted on the head. The problem with this construction is that the size of the pivotable head is bulky due to the pivot mechanism required to transfer the rotary moment of the motor to the hex socket which allows 20 the head to be located in a plurality of angular positions. Therefore, due to the size of the pivotable head, these types of screwdrivers still cannot be used in certain locations. Furthermore, due to the construction of the pivot mechanism, and the tolerances introduced due to the manufacture of component parts, there is certain amount of movement or play between the pivotable head and the body when the 25 pivotable head is locked at an angular position in relation to the body resulting in poor accuracy of the powered screw driver.
Accordingly there is provided a power tool comprising a body; a motor mounted within the body capable of rotatingly driving at least one tool 30 holder mounted on the body; characterized in that there is provided at least two tool holders mounted on the body which are rotationally driven by the motor.
Such a power tool can be a powered screw driver comprising an electric motor powered by a battery mounted within the body of the screw driver.
It will be appreciated that whilst the embodiment of this invention has been 5 described in relation to a power tool with two tool holders such a power tool could comprise three, four or even more tool holders, each of which can be mounted on the body of the power tool either in the same or different orientation to the other tool holders and driven at the same or different rates of rotation to the other tool holders.
10 Ideally, the two tool holders are rotationally driven by the motor simultaneously. This avoids the need for any kind of switching mechanism to be incorporated into the power tool by which the rotary drive of the motor is transferred to one all the other of the tool holders. This keeps the construction simple.
15 Preferably, the axes of rotation of the tool holders are fixed in relation to the body. By ensuring that the position of the tool holders are fixed in relation to the body, the need for any kind of pivoting mechanism is avoided and thus so are any problems associated with such pivoting mechanisms.
20 The tool holders can be hex sockets. This is ideal for screw driver bits.
However, it will be appreciated that the tool holder could be a chuck for a drill bit or any other type of tool holder by which a type of tool such as a drill bit, blade can be attached to the power tool.
25 The axis of rotation of the first tool holder is ideally perpendicular to the axis of rotation of the second tool holder. The body can comprise a longitudinal axis and the axis of rotation of one of the tool holders ideally is parallel to the longitudinal axis of the body. The axis of rotation of one of the tool holders 16 can also be co-axial to the longitudinal axis of the body.
The two tool holder are preferably rotationally driven by the electric motor via a gear mechanism. The gear mechanism can comprise a first gear rotatingly driven by the motor; a second gear rotatingly driven by the first gear and which rotationally drives one of the tool holders; and a third gear rotatingly driven by the second gear
and which rotatingly drives the second tool holder. The first, second and third gears can be bevel gears. The axis of rotation of the first gear is perpendicular to the axis of rotation of the second gear. The axis of rotation of the second gear is perpendicular to the axis of rotation of the third gear. The axis of rotation of the third gear can be 5 parallel to the axis of rotation of the first gear. The axis of rotation of the third gear can be coaxial with the axis of rotation of the first gear.
The tool holder which is driven by the second gear, can be driven via a drive shaft which passes between the first and third gears. This provides a very compact 1 0 structure.
The ratio of the diameter of the gears can be altered in order to adjust the rate of rotation of the tool holders in relation to the rate of rotation of the output drive of the motor and to each other.
An embodiment of the present invention will now be described with reference to the accompanying drawings of which: Figures 1A and 1B show a powered screw driver in accordance with the 20 present invention; Figures 2A and 2B show the head of the powered screw driver; Figure 3 shows the gear mechanism located within the head of powered screw driver. 25 Referring to Figure 1, the powered screw driver comprises an elongate body 2 having a longitudinal axis 14 in which is mounted an electric motor (not shown) in a front section 4 of the body 2 and a battery (not shown) in a rear section 6 of the body 2. The battery and the motor are mounted in line to enable the body to be elongate for ease of use. The rear section 6 of the body 2 forms a handle by which an 30 operator can grasp the powered screw driver in order to use it. A switch 8 is mounted on the side of the body 2 by which the operator can activate electric motor. The switch 8 has three positions, the first position whereby the motor is deactivated, the second position whereby it rotates in a first direction and a third position whereby the motor rotates in a second opposite direction. This enables sleeve screw driver to be
used to either drive a screw into a workplace by rotating it in one direction or remove it from a workplace by rotating it in another direction. The longitudinal axis 14 of the spindle 26 of the electric motor is parallel to and co-axial with the longitudinal axis 14 of the body 2 of the powered screw driver.
Mounted on the end of the elongate body 2 is a drive head 18 which is rigidly fixed to the body. Mounted on one side of the drive head 4 is a first hex socket 10.
The longitudinal axis 12 of the first hex socket 10 is perpendicular to the longitudinal axis 14 of the body of the powered screw driver. The mechanism by which the first 10 hex socket 10 is driven by the motor is described in detail below.
Mounted on the end of the drive head 18 is a second hex socket 16. The longitudinal axis 14 of the second hex socket 16 is parallel with a coaxial with the longitudinal axis 14 body of powered screw driver. The mechanism by which the 15 second hex socket 16 is driven by the motor is described in detail below.
When the operator activates the motor by depression of the switch 8, the motor rotatingly drives both hex socket is 10, 16 simultaneously. This is achieved by the gear mechanism which is shown in figure 3.
Referring to figure 3, the gear mechanism comprises three bevel gears 20, 22, 24. The first bevel gear 20 is mounted rigidly on the end of the spindle 26 of the motor. As the spindle 26 of the motor rotates, the first bevel gear 20 rotates. The axis of rotation 14 of the first bevel gear 20 and the drive spindle 26 is parallel to and 25 coaxial with the longitudinal axis 14 of the body 2 of screw driver.
The first bevel gear 20 meshes with a second that bevel gear 22 which is located perpendicularly to the first bevel gear 20 such that the axis of rotation 12 of the second bevel gear 22 is perpendicular to the axis of rotation 14 of the spindle 26 30 and first bevel gear. Integrally formed with the second bevel gear 22 is a first drive shaft 28 which rotates as a second bevel gear rotates. Mounted rigidly within the end of the first drive shaft is the first hex socket 10, the longitudinal axis 12 of the first hex socket 12 being parallel to and coaxial with the axis of rotation 12 of the second bevel gear 22.
The second bevel gear 22 meshes with a third bevel gear 24 which is located perpendicularly to the second bevel gear 22. The axis of rotation 14 of the third bevel gear 24 is parallel to and coaxial with the axis of rotation 14 of the spindle 26 and the first bevel gear 20. When the second bevel gear 22 rotates, the third bevel 5 gear 24 also rotates. A second drive shaft 30 is integrally formed with the third bevel gear 24 so that rotation of the third bevel gear 24 results in rotation of the second drive shaft 30. The second hex socket 16 is mounted in the end of the second drive shaft 30 so that rotation of the second drive shaft 30 results in rotation of the second hex socket 16. The longitudinal axis 14 of the hex socket 16 is parallel to and coaxial 10 with that of the second drive shaft 30 and third gear 24.
The size of the second gear 22 is larger than that of the first gear 20 so that the rate of rotation of the first hex socket 10 is lower than that of the output spindle 26 of the electric motor. This enables the torque applied to the first hex socket 10 by the 15 motor to be increased. The size of the second gear 22 is larger than that of the third gear 24 which the same as that of the first gear 22. This results in the second hex socket 16 rotating at the same rate as the drive spindle 26 of the motor. It will be appreciated by the person skilled in the art that the ratio of the three gears can be adjusted to generate the appropriate torque on the hex socket by the motor by 20 altering the relative rate of rotation of the hex sockets in relation to the motor spindle 26 of the motor. By using gears of different sizes, the gears not only transfer the rotary movement to the hex sockets but are also used to adjustment the speed of the hex sockets in relation to the spindle 26 of the motor.
25 In use, the spindle 26 of electric motor rotates the first gear wheel 20 which in turn rotatingly drives the second gear wheel 22 with which it is meshed in order to rotationally drive that the first hex socket 10. The second gear wheel rotationally drives the third gear 24 with which it is meshed which in turn rotatingly drives the second hex socket 16. Both hex sockets 10, 16 are rotationally driven by the electric 30 motor simultaneously. The motor is able to rotate in either direction thereby driving the two hex sockets 10, 16 in both directions about their axes of rotation.
A screw driver bit is inserted into either of the two hex drive sockets 10, 16 to screw a screw into or out of a workpiece. The opearator depresses the switch and
activates the motor. The motor rotatingly drives the screw driver bit via the gears 20, 22, 24.
Due to the construction of the gear mechanism, the size of the head is kept 5 extremely small.
The battery, motor and gear mechanism are all located in-line to provide a slender and elongate structure for the powered screw driver.
Claims (16)
1. A power tool comprising a body 2; a motor mounted within the body 2 capable of rotatingly driving at least one tool holder mounted on the body 2; 5 characterized in that there is provided at least two tool holders 10, 16 mounted on the body which are rotationally driven by the motor.
2. A power tool as claimed in claim 1 wherein the two tool holders 10, 16 are rotationally driven by the motor simultaneously.
3. A power tool as claimed in either of claims 1 or 2 wherein the axes of rotation 12, 14 of the tool holders 10, 16 are fixed in relation to the body.
4. A power tool as claimed in any one of the previous claims wherein the tool 15 holders 10, 16 are a hex sockets.
5. A power tool as claimed in any one of the previous claims wherein the axis of rotation 14 of the first tool holder 10 is perpendicular to the axis of rotation 12 of the second tool holder 16.
6. A power tool as claimed in any one of the previous claims wherein the body 2 comprises a longitudinal axis 14 and the axis of rotation 14 of one of the tool holders 16 is parallel to the longitudinal axis 14 of the body 2.
25
7. A power tool as claimed in any one of the previous claims wherein the body 2 comprises a longitudinal axis 14 and the axis of rotation 14 of one of the tool holders 16 is co-axial to the longitudinal axis 14 of the body 2.
8. A power tool as claimed in any one of the previous claims wherein the two tool 30 holder 10, 16 are rotationally driven by the electric motor via a gear mechanism.
9. A power tool as claimed in claim 8 wherein the gear mechanism comprises a first gear 20 rotatingly driven by the motor; a second gear 22 rotatingly driven by the first gear 20 and which rotationally drives one of the tool holders 10; and 5 a third gear 24 rotatingly driven by the second gear 22 and which rotatingly drives the second tool holder 16.
10. A power tool as claimed in claim 9 wherein the first 20 second 22 and third 24 gears are bevel gears.
11. A power tool as claimed in claim 10 wherein the axis of rotation 14 of the first gear 20 is perpendicular to the axis of rotation 12Of the second gear 22.
12. A power tool as claimed in claims 10 or 11 wherein the axis of rotation 12 of 15 the second gear 22 is perpendicular to the axis of rotation 14 of the third gear 24.
13. A power tool as claimed in claims 9, 10 or 11 wherein the axis of rotation of the third gear 24 is parallel to the axis of rotation of the first gear 20.
20
14. A power tool as claimed in claim 12 wherein the axis of rotation of the third gear is coaxial with the axis of rotation of the first gear.
15. A power tool as claimed in claims 9 to 13 wherein the tool holder which is driven by the second gear, is driven via a drive shaft 28 which passes between the 25 first 20 and third 24 gears.
16. A power tool as claimed in claims 9 to 14 wherein the ratio of the diameter of the gears can be altered in order to adjust the rate of rotation of the tool holders in relation to the rate of rotation of the output drive of the motor and to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0229221A GB2396127A (en) | 2002-12-14 | 2002-12-14 | Dual output power tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0229221A GB2396127A (en) | 2002-12-14 | 2002-12-14 | Dual output power tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0229221D0 GB0229221D0 (en) | 2003-01-22 |
| GB2396127A true GB2396127A (en) | 2004-06-16 |
Family
ID=9949719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0229221A Withdrawn GB2396127A (en) | 2002-12-14 | 2002-12-14 | Dual output power tool |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2396127A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161197A (en) * | 2006-12-18 | 2011-08-24 | 罗伯特·博世有限公司 | Motor-driven machine tool |
| EP3120973A1 (en) * | 2015-07-22 | 2017-01-25 | Robert Bosch Gmbh | Hand tool with two drives |
| CN108000127A (en) * | 2017-12-12 | 2018-05-08 | 大连理工大学 | A kind of aircraft engine high pressure rotor seal pan postposition nut tightening device and method |
| CN108081189A (en) * | 2017-12-12 | 2018-05-29 | 大连理工大学 | It is a kind of to be useful in the link-type tightening mechanism tightened in inner-cavity structure and method |
| NL2018778B1 (en) * | 2017-04-25 | 2018-11-05 | Skil B V | Power tool |
| CN109909960A (en) * | 2019-04-22 | 2019-06-21 | 北京送变电有限公司 | A kind of electric tool |
| US11267155B2 (en) * | 2019-05-13 | 2022-03-08 | Disco Corporation | Cutting apparatus |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1650911A (en) * | 1923-05-09 | 1927-11-29 | Dorn Electric Tool Company Van | Portable hand tool |
| US1750957A (en) * | 1928-06-07 | 1930-03-18 | Clarence D Fowler | Drill attachment |
| US2489102A (en) * | 1946-01-11 | 1949-11-22 | Noble E Moore | Compound tool |
| US2900844A (en) * | 1958-09-22 | 1959-08-25 | Kalilec Daniel | Double spindle power tool |
| US2963913A (en) * | 1959-06-01 | 1960-12-13 | Wensloff Allen | Power take-off for electric hand drills |
| US3724561A (en) * | 1971-09-09 | 1973-04-03 | F Merrels | Multiple tool driving unit |
| GB1357007A (en) * | 1971-04-21 | 1974-06-19 | Gkn Screws Fasteners Ltd | Power tool |
| EP0150495A2 (en) * | 1984-01-04 | 1985-08-07 | Erwin Faller | Angular screwing device |
| US4810916A (en) * | 1987-12-16 | 1989-03-07 | Mcbride Scott | Rotary power tool having dual outputs |
| US5261135A (en) * | 1992-05-01 | 1993-11-16 | Mitchell Brent R | Screw gun router for drywall installation |
| US5269104A (en) * | 1992-03-25 | 1993-12-14 | Dibiagio Angelo | Hand held work preparation device |
| EP0673723A1 (en) * | 1994-03-23 | 1995-09-27 | Black & Decker Inc. | Drill configuration |
| US5573358A (en) * | 1993-09-09 | 1996-11-12 | Gobbers; Walter | Dual tool-carrier for hand drills |
-
2002
- 2002-12-14 GB GB0229221A patent/GB2396127A/en not_active Withdrawn
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1650911A (en) * | 1923-05-09 | 1927-11-29 | Dorn Electric Tool Company Van | Portable hand tool |
| US1750957A (en) * | 1928-06-07 | 1930-03-18 | Clarence D Fowler | Drill attachment |
| US2489102A (en) * | 1946-01-11 | 1949-11-22 | Noble E Moore | Compound tool |
| US2900844A (en) * | 1958-09-22 | 1959-08-25 | Kalilec Daniel | Double spindle power tool |
| US2963913A (en) * | 1959-06-01 | 1960-12-13 | Wensloff Allen | Power take-off for electric hand drills |
| GB1357007A (en) * | 1971-04-21 | 1974-06-19 | Gkn Screws Fasteners Ltd | Power tool |
| US3724561A (en) * | 1971-09-09 | 1973-04-03 | F Merrels | Multiple tool driving unit |
| EP0150495A2 (en) * | 1984-01-04 | 1985-08-07 | Erwin Faller | Angular screwing device |
| US4810916A (en) * | 1987-12-16 | 1989-03-07 | Mcbride Scott | Rotary power tool having dual outputs |
| US5269104A (en) * | 1992-03-25 | 1993-12-14 | Dibiagio Angelo | Hand held work preparation device |
| US5261135A (en) * | 1992-05-01 | 1993-11-16 | Mitchell Brent R | Screw gun router for drywall installation |
| US5573358A (en) * | 1993-09-09 | 1996-11-12 | Gobbers; Walter | Dual tool-carrier for hand drills |
| EP0673723A1 (en) * | 1994-03-23 | 1995-09-27 | Black & Decker Inc. | Drill configuration |
Non-Patent Citations (1)
| Title |
|---|
| EP0150495 A2 & WPI Abstract Accession No. 1985-172467/37 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161197A (en) * | 2006-12-18 | 2011-08-24 | 罗伯特·博世有限公司 | Motor-driven machine tool |
| CN102161197B (en) * | 2006-12-18 | 2015-06-03 | 罗伯特·博世有限公司 | Motor-driven machine tool |
| EP3120973A1 (en) * | 2015-07-22 | 2017-01-25 | Robert Bosch Gmbh | Hand tool with two drives |
| NL2018778B1 (en) * | 2017-04-25 | 2018-11-05 | Skil B V | Power tool |
| EP3401061A1 (en) * | 2017-04-25 | 2018-11-14 | Skil B.V. | Power tool, and assembly of such a power tool and an accessory |
| EP3797930A1 (en) | 2017-04-25 | 2021-03-31 | Skil B.V. | Power tool |
| CN108000127A (en) * | 2017-12-12 | 2018-05-08 | 大连理工大学 | A kind of aircraft engine high pressure rotor seal pan postposition nut tightening device and method |
| CN108081189A (en) * | 2017-12-12 | 2018-05-29 | 大连理工大学 | It is a kind of to be useful in the link-type tightening mechanism tightened in inner-cavity structure and method |
| CN108000127B (en) * | 2017-12-12 | 2019-05-17 | 大连理工大学 | A kind of aircraft engine high pressure rotor seal pan postposition nut tightening device and method |
| CN109909960A (en) * | 2019-04-22 | 2019-06-21 | 北京送变电有限公司 | A kind of electric tool |
| US11267155B2 (en) * | 2019-05-13 | 2022-03-08 | Disco Corporation | Cutting apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0229221D0 (en) | 2003-01-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |