GB1292537A - Improvements in or relating to hand power tools - Google Patents
Improvements in or relating to hand power toolsInfo
- Publication number
- GB1292537A GB1292537A GB5884270A GB5884270A GB1292537A GB 1292537 A GB1292537 A GB 1292537A GB 5884270 A GB5884270 A GB 5884270A GB 5884270 A GB5884270 A GB 5884270A GB 1292537 A GB1292537 A GB 1292537A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flywheel
- dogs
- holder
- spring
- drive
- 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.)
- Expired
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
- B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Press Drives And Press Lines (AREA)
Abstract
1292537 Power tools ROBERT BOSCH GmbH 11 Dec 1970 [13 Dee 1969] 58842/70 Heading B3N A power tool comprises a drive motor and a drive transmission for imparting rotary impacts to a workpiece holder 28 and wherein a flywheel 18 mounted on a drive shaft 5 is rotatable by the drive shaft and is longitudinally located on the shaft by resilient members 24, 25 so as to be capable of axial oscillation and has impact dogs 26 engageable with impact dogs 31 on the workpiece holder by an axial displacement of the workpiece holder towards the flywheel. The flywheel is rotatably mounted on bushes 14, 15 which are non-rotatably mounted ted on shaft 5. Members 24, 25 are in the form of cup springs and provide a friction drive to the flywheel and also allow axial movement thereof. The impact dogs 26, 31 are shown in Fig. 2 where it is clear that the flanks of a dog are of different slope with the steeper flank being for unfastening a nut. There may be 4 or 8 equally spaced dogs on each of the flywheel and holder 28. If there are 8 such dogs then alternate dogs on each part have a shortened length to allow suitable engaging of the dogs during impacting. In operation the motor, having permanent magnets 7, is activated to drive the flywheel to a maximum speed, about 6000 r.p.m. The tool is then forced toward a nut connection which is engaged by holder 28. Spring 34 is compressed and the impact dogs meet. Full engagement of the dogs is impossible and the flywheel is forced axially away from the holder 28. Thus the holder receives a series of impacts and the flywheel oscillates axially as well as rotating. In an alternative embodiment, Fig. 4, a holder 128 and flywheel 118 are biased apart by a cup spring 152 having a characteristic whereby the spring force in relation to its compression increases to a maximum and then falls. A yet further embodiment is shown in Fig. 6 where a flywheel 218 and a holder 228 are biased apart by a spring 234. In operation to tool is forced toward a nut and the motor started. At a predetermined speed balls 259 are forced outwardly against an annular spring 260. Balls 257 also move outwardly so that spring 234 is compressed abruptly and the dogs come into engagement. The motor is designed to be driven by the direct current from a car battery.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19696948217 DE6948217U (en) | 1969-12-13 | 1969-12-13 | POWER TOOL FOR EXERCISING ROTATION. |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1292537A true GB1292537A (en) | 1972-10-11 |
Family
ID=6607037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5884270A Expired GB1292537A (en) | 1969-12-13 | 1970-12-11 | Improvements in or relating to hand power tools |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE6948217U (en) |
FR (1) | FR2066788A5 (en) |
GB (1) | GB1292537A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0284894A1 (en) * | 1987-03-24 | 1988-10-05 | Pat Ag | Fastening device with a screw, and impact tool for universal fastenings |
CN105473285A (en) * | 2013-08-08 | 2016-04-06 | 阿特拉斯·科普柯工业技术公司 | Power tool with flywheel and gear for accelerating said flywheel |
JP2016527094A (en) * | 2013-08-08 | 2016-09-08 | アトラス・コプコ・インダストリアル・テクニーク・アクチボラグ | Torque supply power tool with flywheel |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2510524C2 (en) * | 1975-03-11 | 1982-12-16 | Vsesojuznyj naučno-issledovatel'skij i proektno-konstruktorskij institut mechanizirovannogo i ručnogo stroitel'no-montažnogo instrumenta, vibratorov i stroitel'no-otdeločnych mašin VNIISMI, Chimki, Moskovskaja oblast' | Impact wrench |
IT1194465B (en) * | 1983-11-18 | 1988-09-22 | Ferioli Filippo Srl | MULTI-PURPOSE PORTABLE EQUIPMENT IN PARTICULAR FOR THE OPERATION OF ROTATION TOOLS IN ROTATION AND PERCUSSION AND ONLY PERCUSSION |
FR2631575B1 (en) * | 1988-05-17 | 1993-08-20 | Etma Sa | DEVICE FOR UNLOCKING OR TIGHTENING NUTS AND BOLTS |
EP0381787A1 (en) * | 1989-02-06 | 1990-08-16 | Huang, Dora Hsiao-Ling | Improvements in wrenches |
WO1996030166A1 (en) * | 1995-03-29 | 1996-10-03 | Georg Baersch | Motor-driven rotary percussion tool |
-
1969
- 1969-12-13 DE DE19696948217 patent/DE6948217U/en not_active Expired
-
1970
- 1970-10-30 FR FR7039257A patent/FR2066788A5/fr not_active Expired
- 1970-12-11 GB GB5884270A patent/GB1292537A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0284894A1 (en) * | 1987-03-24 | 1988-10-05 | Pat Ag | Fastening device with a screw, and impact tool for universal fastenings |
CN105473285A (en) * | 2013-08-08 | 2016-04-06 | 阿特拉斯·科普柯工业技术公司 | Power tool with flywheel and gear for accelerating said flywheel |
JP2016527093A (en) * | 2013-08-08 | 2016-09-08 | アトラス・コプコ・インダストリアル・テクニーク・アクチボラグ | Power tool with flywheel and gear for accelerating the flywheel |
JP2016527094A (en) * | 2013-08-08 | 2016-09-08 | アトラス・コプコ・インダストリアル・テクニーク・アクチボラグ | Torque supply power tool with flywheel |
Also Published As
Publication number | Publication date |
---|---|
FR2066788A5 (en) | 1971-08-06 |
DE6948217U (en) | 1971-05-27 |
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