WO2000025986A2 - Umschaltbarer ratschen-schraubendreher - Google Patents
Umschaltbarer ratschen-schraubendreher Download PDFInfo
- Publication number
- WO2000025986A2 WO2000025986A2 PCT/DE1999/003437 DE9903437W WO0025986A2 WO 2000025986 A2 WO2000025986 A2 WO 2000025986A2 DE 9903437 W DE9903437 W DE 9903437W WO 0025986 A2 WO0025986 A2 WO 0025986A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shaft
- housing
- axially
- driving section
- freewheels
- Prior art date
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
- B25B15/00—Screwdrivers
- B25B15/02—Screwdrivers operated by rotating the handle
- B25B15/04—Screwdrivers operated by rotating the handle with ratchet action
Definitions
- the invention relates to a switchable ratchet screwdriver according to the preamble of claim 1, as it is for pressing actuating screw parts or tools, eg. B. a screw, nut or socket, is used.
- Switchable ratchet screwdrivers are already known in different embodiments. Coupling elements are already e.g. Double spring clutches (US Pat. No. 4,341, 293), ratchet wheels (US Pat. No. 819,536) or one-way clutches (US Pat. No. 3,868,993, DE 25 03 372 A1, US Pat. No. 4,485,699 and WO 99/04178) were used. The latter are the most advantageous because they are practically noiseless and also work very precisely.
- these known ratchet tools are generally relatively heavy and bulky and cannot easily be used as pocket tools, i.e. e.g. be carried in the shirt or jacket pocket without this being affected.
- either the switching slide projecting on the casing side makes the switching relatively cumbersome and difficult to move in some cases, or the switching is done with two hands. take by holding the handle with one hand and pulling or pushing on the shaft with the other. In addition, as already mentioned, these tools cannot always be carried optimally.
- the object of the invention is thus a ratchet screwdriver or the like.
- the switchable ratchet screwdriver according to the invention is constructed in the manner of a ballpoint pen and thus has a slim, tubular housing with an active part reaching out at its front end and a push-button at the rear end acting against spring force and an externally axially extending fastening clip.
- the axial shifting displacement movement of the shaft driving part or the freewheels for the left / right activation can be carried out by means of a push-button switching device customary on the market.
- There is therefore a slim screwdriver tool in ballpoint pen format as is already available in specialist shops as a normal screwdriver with a fixed blade and often also with a voltage tester.
- the tool according to the invention has the advantage that - in addition to the great advantage that it can be switched over to left-right ratchets or working direction - it can be carried in the jacket pocket without problems, without great difficulty by hanging it in its clip.
- the freewheels are fixedly arranged on the inner casing of the tubular housing, for example by gluing or pouring, and the shaft with the driving section is axially displaceable in the manner of a ballpoint pen refill.
- the shaft is also secured against axial pulling out to the front by a shaft shoulder that bears against a housing shoulder and stands on the other hand at the rear of the push button switch mechanism.
- the switching mechanism can consist, for example, of a switching sleeve, into which the shaft end protrudes on the one hand and the push button engages via a serration.
- a double freewheel with a one-piece double outer ring is provided, which in particular saves space, is easier to assemble and fasten, and is easier to switch.
- the shaft can be arranged immovably in the housing, while the two freewheels or the one-piece double freewheel are shifted to the fixed shaft-driving section in the switching position left / right by the push-button switching mechanism.
- the switching mechanism acts with the aid of a bell-shaped sleeve on the freewheel, on the rollers or the roller cage and / or the bearing outer ring, which is also kept under tension by means of an axially counteracting compression spring, that is, it is always present under tension on the switching mechanism.
- the outer left-hand freewheel has a smaller diameter than the inner one and interacts with a second driving section of the shaft, which also has a smaller diameter. Both left-hand freewheels can be brought into engagement essentially simultaneously. This ensures that a correspondingly greater torque is available when unscrewing relatively tight screws than when screwing in on the right.
- a very advantageous embodiment can be achieved if only one free-running cage is provided, which is fixed immovably on the driving section of the shaft, while two freewheel outer rings or a double freewheel outer ring are provided on the housing shell.
- the freewheel cage seated on the driving section must therefore be displaced in relation to the two freewheel outer rings or the freewheel double outer ring, which can be done by moving the shaft when the outer ring is stationary or by moving the double outer ring in relation to the stationary one Shaft that is feasible. It can be seen that this design is more cost-effective since only a single-row freewheel cage is used, ie a series of freewheel rollers or needles are saved.
- the shaft can be divided in two at below or at the height of its driving section by an axial-radial step, one half of the shaft being axially immovable is connected to the housing, while the second shaft half executes the spring-loaded switching movement. It can be seen that the shaft part which is inactive with respect to the switching movement and now only performs the screwing work or carries out the ratcheting rotary movement is no longer axially spring-loaded, since the spring only acts on the active sliding-switching shaft part or charged.
- the division can be made in the form of step cutouts on the respective shaft parts, so that the two shaft part ends, when pushed together in a complementary manner, present themselves as a full shaft. len. Corresponding axial guidance can also be ensured via a ring enclosing both half-shaft parts, if necessary.
- the division of the shaft in two can also be achieved in a particularly advantageous manner in that two parts are provided, the ends of which facing each other telescopically interlock.
- one end of the shaft part can have a bore into which the pin of the other end of the shaft part can be moved axially, but is non-rotatably seated via a pin, groove, tongue, etc.
- This is the simplest embodiment in terms of production technology and can also be optimally implemented in terms of space without fear that the two interacting shaft part ends do not work properly together with screwing torque, i.e. can bend apart.
- the flexible shaft can be firmly attached to the front end of the shaft and at its outer end e.g. have a bit holder.
- the flexible shaft can also be used as an independent additional or adapter part in the context of a tool set for a screwdriver with a bit holder, i.e. with bit holder attached to the shaft.
- the flexible shaft can have a hexagon plug head at one end, as is provided in a similar manner for the bits, and at the other end e.g. a bit holder, so that a very comprehensive tool or tool set is available.
- a voltage tester known per se can advantageously be interposed in the shaft, in which case the housing must then be at least partially transparent.
- Screwdriver in advanced, left-handed position of the shaft
- Fig. 2 a view as in Fig. 1, in a retracted, right-hand screw
- FIG. 3 shows a schematic sectional illustration through a ratchet screwdriver in a design with a fixed shaft and shift-free freewheels
- FIG. 4 shows a partially sectioned view of the arrangement of the essential functional elements, in the embodiment with a displaceable shaft and on the driving section of the freewheel cage and double freewheel outer ring which are axially displaceably seated;
- Double outer ring and axially movable free-wheel cage Double outer ring and axially movable free-wheel cage
- FIG. 6 shows a perspective sectional view of a double freewheel bearing
- Fig. 8 a schematic representation of a further embodiment, without housing, with a shaft section divided under the bearings;
- FIG. 9 a view as in FIG. 8, with the shaft divided at the level of the freewheels;
- FIG. 10 is a view as in FIG. 8, with the shaft divided beneath the freewheels in a telescopically displaceable form;
- FIG. 11 shows a schematic sectional view of an embodiment as in FIG. 2, with an additional voltage tester
- FIG. 12 is a view of a tool as in FIG. 1, with a flexible shaft provided on the shaft;
- Fig. 13 is an exploded view of the front end of the tool, with Bit holder and with a flexible shaft as an accessory;
- FIG. 15 the clip from FIG. 14, with the clip pivoted out in a T-shape.
- the ratchet screwdriver is designed in the manner of a ballpoint pen, with a slim, tubular housing to which a fastening clip 2 is attached.
- a tapered end part 3 in this embodiment, which is provided in a manner known per se for screwing onto the housing.
- a shank 4 protrudes from this, which in turn has the tool tip at its outer end, here a slotted screwdriver tip.
- a push button 6 protrudes from the top of the housing.
- An arrow 7 indicates how the push button is pressed, that is to say the button for switching is pressed down for a first switching movement, as a result of which, as indicated by arrow 8, the active screwing direction is directed to the left. This means that the screwdriver is suitable for screwing on in this position.
- Fig. 2 it is indicated by arrow 9 that the push button 6 is pressed to activate the next working or ratcheting position, after which it jumps up.
- the shaft 4 is in the retracted position and, as indicated by arrow 10, engages in a clockwise rotation, that is, it is set to screw in.
- FIG. 2 it can be seen schematically that in the housing 1 in axial succession two opposing freewheels 11, 12 are fixedly arranged by pouring, gluing or in another known manner.
- a shaft 4 is passed axially in the longitudinal direction and has a freewheel driving section 14 at the level of the freewheel, which cooperates with the freewheels in a manner known per se. At the upper end, the shaft 4 is axially in contact with a switching device known per se, which is not shown in more detail here.
- An axial stop 16 is provided on the shaft 4 below the driving section 14, in such a way that the lower freewheel 12 is not touched in the shifted switching position. can be the shoulder or a snap ring.
- a compression spring 17 is supported, which always presses the shaft 4 under pretension, as a result of which the switching mechanism 15 becomes functional.
- a pull-out protection 18 is provided on the shaft 4, which can also be a shoulder or a snap ring, but is only large enough that it does not collide with the spring 17.
- the shaft 4 is arranged so as to be displaceable in the housing, in such a way that the pull-out protection 18 rests on the end face of the housing end part 3, while a bit holder 19 is arranged on the shaft directly at the protruding shaft end on the outer end face of the end part 3 which prevents the shaft from moving upwards.
- the two counter-rotating freewheels 11, 12 are here axially displaceably provided in the housing 1, these being held up under prestress by the compression spring 17. This is on the one hand against the end part 3 and on the other hand against the end face of the bearing 12 or an interposed disc, below Pressure on.
- the switching mechanism 15 here consists of a switching sleeve 20, which abuts the upper end face of the upper freewheel 11 and at the upper end of which there are known switching prongs 21 which cooperate with corresponding switching prongs of the push button 6.
- FIG. 4 shows how a free-wheeling cage is arranged so as to be axially displaceable directly on the driving section 14 of a shaft 4.
- This assembly that is to say a shaft with a driving section and a roller cage located thereon, is axially displaceable within a double outer ring 23.
- This double outer ring 23 has two axially successive sections, namely for left and right-hand coupling.
- FIG. 5 shows the construction of this double one-way clutch, which, as can be clearly seen here, has only one axially displaceable one-way cage 22.
- 6 shows a double freewheel, which consists of two axially very close to one another freewheel cages 22 and 24, which are arranged in a double outer ring 23, similar to that from FIGS. 4 and 5.
- Fig. 7 shows the arrangement of three freewheels in axial succession, e.g. 2 or 3, the freewheels 11 and 12, for right and left, which cooperate with the driving section 14 of the shaft 4.
- a second driving section 27 is provided on the shaft 4, which interacts with the third freewheel 6.
- the shaft 4 is divided into two parts in its longitudinal extent so that the lower shaft part 4a projects upwards with a half pin 28 and the upper shaft part 4b projects downwards with a half pin 29 such that the two semicircular Stand the pegs together with their respective flat parts, together forming a circle and at the same time being rotationally driven.
- Both parts have a shoulder 30 and 31 at the respective lower end of their pin 28, 29, between which a compression spring 17 is arranged. There is thus support axially downward via a shoulder 32 and a snap ring 33 at the lower housing end of the axially fixed shaft part 4a, while the upper shaft part 4b is pressed upwards, so that the driving section 14 is optionally connected to the freewheel 11 by the switching device (not shown) or 12, depending on whether you want to turn left or right.
- the section 14a having a smooth outer lateral surface 34, thus being neutral, i.e. not driving relative to the freewheels 11 and 12 and merely the role of a radial one Leadership or Support plays.
- the upper driving part 14b of the shaft part 4b is designed to cooperate with one of the two freewheels, depending on which freewheel is brought into engagement by axial displacement.
- the upper shaft part 4b is supported by a lower shoulder 31 via a compression spring 17 on a shoulder 30 of the lower shaft part 4a, whereby the switching function of the switching mechanism, not shown here, is ensured.
- 9a shows a radial section through the driving section 14 and it can be seen that the support section 14a consists of two mirror-image arranged arms which are inserted axially displaceably in corresponding cutouts in the switching section 14b.
- FIG. 11 shows how a voltage tester 37 is interposed in a shaft 4, the housing having a transparent section or window 38 at this height.
- FIG. 12 shows how a flexible shaft 39 is fastened to the shaft 4, which has a bit holder 19 at its outer end, in which a bit 40 is inserted via its hexagon 41.
- an independent flexible element 42 is provided, which can be added as an accessory to a bit ratchet screwdriver. It essentially consists of a flexible shaft 39, which is provided at one end with a hexagon 41 which can be inserted into a bit holder 19 fastened to the shaft 4 of the ratchet screwdriver. This bit holder 19 has one Magnet 34, which holds the hexagon and thus the flexible shaft against falling out. At the other end of the flexible shaft 39, a bit holder 19 is provided which, as described in FIG. 12, serves to receive a bit 40.
- This joint 44 is preferably designed in such a way that it allows pivoting by 90 °, that is to say in the T position, and in each of these two positions should also have a corresponding locking device, in order on the one hand to hang it into a jacket pocket, on the other hand, and on the other hand the role of a Screwdriver can meet.
- Driving section 40 Bit 14a. Support section 41. Hexagon 14b. Switching section 42. flexible element
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Mechanical Operated Clutches (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Switches With Compound Operations (AREA)
- Electrophonic Musical Instruments (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Pulleys (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59902005T DE59902005D1 (de) | 1998-10-29 | 1999-10-28 | Umschaltbarer ratschen-schraubendreher |
AT99960832T ATE220363T1 (de) | 1998-10-29 | 1999-10-28 | Umschaltbarer ratschen-schraubendreher |
AU17701/00A AU1770100A (en) | 1998-10-29 | 1999-10-28 | Switchable ratchet screw driver |
EP99960832A EP1124667B1 (de) | 1998-10-29 | 1999-10-28 | Umschaltbarer ratschen-schraubendreher |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29819294.2 | 1998-10-29 | ||
DE29819294U DE29819294U1 (de) | 1998-10-29 | 1998-10-29 | Schraubendreher mit Freilaufratsche im Kugelschreiberformat |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000025986A2 true WO2000025986A2 (de) | 2000-05-11 |
WO2000025986A3 WO2000025986A3 (de) | 2000-08-31 |
Family
ID=8064564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/003437 WO2000025986A2 (de) | 1998-10-29 | 1999-10-28 | Umschaltbarer ratschen-schraubendreher |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1124667B1 (de) |
AT (1) | ATE220363T1 (de) |
AU (1) | AU1770100A (de) |
DE (3) | DE29819294U1 (de) |
WO (1) | WO2000025986A2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110355711A (zh) * | 2019-08-14 | 2019-10-22 | 李理 | 一种具有棘轮结构的螺丝刀 |
US10730167B2 (en) | 2017-07-19 | 2020-08-04 | Zimmer, Inc. | Disposable surgical screwdriver |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015111877A1 (de) | 2015-07-22 | 2017-01-26 | Aesculap Ag | Werkzeugaufnahmeaufsatz für chirurgische Bohrmaschine mit zusätzlicher manueller Antriebseinheit und chirurgische Bohrmaschine |
DE102015111878A1 (de) | 2015-07-22 | 2017-01-26 | Aesculap Ag | Platzsparende Ratscheinheit mit Freilauf |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3657812A (en) * | 1970-09-28 | 1972-04-25 | G & L Ind Inc | Retractible tool holder |
DE2503372A1 (de) * | 1974-01-29 | 1975-07-31 | Black & Decker Ltd | Schraubendreher |
US4485699A (en) * | 1982-08-12 | 1984-12-04 | Fuller Kevin S | Rotatable hand tool with directional drive control |
US4515046A (en) * | 1983-02-08 | 1985-05-07 | Gilbert Johnson | Retractable torque applying tool |
DE19707798A1 (de) * | 1997-02-27 | 1998-09-03 | Werner Hermann Wera Werke | Freilaufschraubendreher |
DE19730300A1 (de) * | 1997-03-07 | 1998-09-17 | Engelbert Gmeilbauer | Ratscheneinrichtung |
-
1998
- 1998-10-29 DE DE29819294U patent/DE29819294U1/de not_active Expired - Lifetime
-
1999
- 1999-10-28 DE DE19951888A patent/DE19951888A1/de not_active Withdrawn
- 1999-10-28 EP EP99960832A patent/EP1124667B1/de not_active Expired - Lifetime
- 1999-10-28 AT AT99960832T patent/ATE220363T1/de not_active IP Right Cessation
- 1999-10-28 AU AU17701/00A patent/AU1770100A/en not_active Abandoned
- 1999-10-28 DE DE59902005T patent/DE59902005D1/de not_active Expired - Fee Related
- 1999-10-28 WO PCT/DE1999/003437 patent/WO2000025986A2/de active IP Right Grant
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3657812A (en) * | 1970-09-28 | 1972-04-25 | G & L Ind Inc | Retractible tool holder |
DE2503372A1 (de) * | 1974-01-29 | 1975-07-31 | Black & Decker Ltd | Schraubendreher |
US4485699A (en) * | 1982-08-12 | 1984-12-04 | Fuller Kevin S | Rotatable hand tool with directional drive control |
US4515046A (en) * | 1983-02-08 | 1985-05-07 | Gilbert Johnson | Retractable torque applying tool |
DE19707798A1 (de) * | 1997-02-27 | 1998-09-03 | Werner Hermann Wera Werke | Freilaufschraubendreher |
DE19730300A1 (de) * | 1997-03-07 | 1998-09-17 | Engelbert Gmeilbauer | Ratscheneinrichtung |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10730167B2 (en) | 2017-07-19 | 2020-08-04 | Zimmer, Inc. | Disposable surgical screwdriver |
CN110355711A (zh) * | 2019-08-14 | 2019-10-22 | 李理 | 一种具有棘轮结构的螺丝刀 |
Also Published As
Publication number | Publication date |
---|---|
DE19951888A1 (de) | 2000-05-18 |
WO2000025986A3 (de) | 2000-08-31 |
ATE220363T1 (de) | 2002-07-15 |
AU1770100A (en) | 2000-05-22 |
DE29819294U1 (de) | 1999-04-15 |
EP1124667A2 (de) | 2001-08-22 |
DE59902005D1 (de) | 2002-08-14 |
EP1124667B1 (de) | 2002-07-10 |
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