EP2134513B1 - Outil de vissage comprenant un mecanisme de roue libre - Google Patents

Outil de vissage comprenant un mecanisme de roue libre Download PDF

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Publication number
EP2134513B1
EP2134513B1 EP08701351.2A EP08701351A EP2134513B1 EP 2134513 B1 EP2134513 B1 EP 2134513B1 EP 08701351 A EP08701351 A EP 08701351A EP 2134513 B1 EP2134513 B1 EP 2134513B1
Authority
EP
European Patent Office
Prior art keywords
drive arm
screwdriving tool
tool according
gear
fork
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.)
Active
Application number
EP08701351.2A
Other languages
German (de)
English (en)
Other versions
EP2134513A2 (fr
Inventor
Michael Abel
André Müller
Oliver Pistor
Martin Strauch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wera Werk Hermann Werner GmbH and Co KG
Original Assignee
Wera Werk Hermann Werner GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wera Werk Hermann Werner GmbH and Co KG filed Critical Wera Werk Hermann Werner GmbH and Co KG
Priority to EP09172019.3A priority Critical patent/EP2135714B1/fr
Publication of EP2134513A2 publication Critical patent/EP2134513A2/fr
Application granted granted Critical
Publication of EP2134513B1 publication Critical patent/EP2134513B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/06—Handle constructions reversible or adjustable for position
    • B25G1/063—Handle constructions reversible or adjustable for position for screwdrivers, wrenches or spanners
    • 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
    • B25B13/00—Spanners; Wrenches
    • B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0021—Prolongations interposed between handle and tool
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0028—Angular adjustment means between tool head and handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/06—Handle constructions reversible or adjustable for position
    • B25G1/063—Handle constructions reversible or adjustable for position for screwdrivers, wrenches or spanners
    • B25G1/066—Handle constructions reversible or adjustable for position for screwdrivers, wrenches or spanners the grip itself being angularly adjustable

Definitions

  • the invention relates to a screwing tool according to the preamble of claim 1.
  • a screwing tool with a drive arm which forms at its end two forks, between which a gear head is formed, which is pivotable by 90 ° between apprisgefesselten positions, one of which is a Schnellschraub ein and a Kraftschraubgna shows the US 2001/0000092 A1
  • the drive arm extends at a right angle to the output axis of rotation and forms a lifting arm.
  • the drive arm is located in the output axis of rotation.
  • the US 1,643,855 describes a screwing tool having an actuating arm.
  • the actuator arm forms a drive shaft which can be rotated to rotate a gimbal-hinged nut at the end of the actuator arm.
  • On the operating arm sits a freely rotatable, axially bound sleeve.
  • a wrench with a gear head and a drive arm wherein the gear head forms a gear housing in which a freewheel or ratchet gear is arranged with a driven axis of rotation, wherein an end face of the gear head has a driven coupling in the form of a polygon and wherein the drive arm to a in the Substantially transverse to the output axis of rotation extending pivot axis of a Schnellschraubhus in which the drive arm is located in the output axis of rotation, in a Kraftschraub ein is pivotally, in which Drive arm extends substantially transversely to the output axis of rotation, and is fixed by means of locking means in the two pivot positions, wherein the locking means by means of the drive arm associated actuator is displaced from a detent position to a release position.
  • the actuating means is in this screwing a parallel to the pivot axis displaceable pin. This interacts with a detent ball, which cooperates with detent niches of a bearing extension of the gear head.
  • the bearing extension is a narrow section of the gear head, which faces the output square. This extension is penetrated by a bearing screw.
  • the lever is located in a side recess of a handle and can be pivoted 90 ° about a pivot axis.
  • the drive arm is axially fixed to a driven blade connected.
  • the drive arm consists of two parts. A part can be pivoted about a pivot axis in a 90 ° position.
  • the US 4,541,310 describes a screwing tool, with a drive arm, which is connected via an eccentric joint with a gear head.
  • the drive arm can be brought by 90 ° from a Schnellschraub- in a Kraftschraubgna.
  • the US 1,601,767 describes a screwing tool with a drive arm which is firmly connected to a gear head. On a drive projection of the gear head, a screwdriver handle can be plugged.
  • a similar solution describes the US 4,054,067 ,
  • the invention has for its object to simplify the "twirling" in the Schnellschraubgna at a screwing tool mentioned above.
  • the flywheels may be arranged adjacent to a fork fork having bearing fork for the gear head.
  • the rotatable sleeve may be adjacent to a handle associated with the free end of the drive arm.
  • This handle preferably has a rotational symmetry, so that on this handle easily by means of thumb, forefinger and middle finger an angular momentum can be imposed, which puts the screwing tool in the Schnellschraub ein in a continuous rotational movement.
  • the forks are rooted in a widened portion of the drive arm. This widened portion of the drive arm, which is also associated with the slide button, forms diametrically opposed bulges.
  • the bulges Since the material of the drive arm and consequently also of the bulges is a metal, preferably steel, the bulges have a mass. They act as a flywheel to improve the "twirling" of the screwing tool in Schnellschraubnite.
  • Schnellschraubrium can be applied to the rear end of the handle by the fingers of the user torque.
  • the other hand of the user engages around the sleeve, which sits axially fixed but rotatable on the drive arm.
  • the flywheel such an angular momentum builds up only slowly.
  • the tool can rotate freely within the sleeve.
  • the flywheel ensures that the output square rotates by a large number of turns. As a result, even longer screws can be quickly turned out of or into a thread.
  • the essential components of the screwing tool consist of the gear head and a steel body, which forms the bearing fork for the gear head, a shaft portion for supporting the rotatable sleeve and an end portion to which the handle is attached forms.
  • the handle can be made of plastic and on the end of the Shank attached or sprayed on.
  • the flywheels are formed by the steel body. Both the fork and the flywheels are formed integrally with the material preferably formed by a hardened forged steel body. In order to force the screwing tool in the high-speed screwing position to continue its own rotation over several rotations, the mass moment of inertia of the steel body relative to the drive rotational axis in the high-speed screwing position should be above a minimum value.
  • the mass moment of inertia of the steel body should be below a maximum value in order to apply the lowest possible deceleration torque when reversing the direction of force screws.
  • the steel body extends only partially in the plastic handle, so that the free end of the handle is formed by the plastic handle part.
  • Both the minimum value and the maximum value depend to a considerable extent on the size of the screwing tool.
  • the minimum value of the moment of inertia of the steel body in the Schnellschraubhusbigoubigin and the maximum value of the mass moment of inertia of the steel body in the Kraftschraubwolf depend on the extent of the output coupling.
  • the values are greater for screwdrivers with a 1 ⁇ 2 inch output coupling than for a screwdriver with a 3 ⁇ 8 inch output coupling.
  • the latter values are in turn greater than with a 1/4 inch output coupling wrench.
  • the flywheel masses are arranged in the vicinity of the storage fork.
  • the minimum value of the mass moment of inertia in the high-speed screw position is 30 kg mm 2 , preferably 40 kg mm 2 , more preferably 45 kg mm 2 .
  • the minimum value of the mass moment of inertia in the high-speed screw position is preferably 15 kg mm 2 , more preferably 20 kg mm 2 , more preferably 25 kg mm 2 .
  • the minimum value of the mass moment of inertia in the quick-set position is preferably 3 kg mm 2 , more preferably 4 kg mm 2 , more preferably 4.5 kg mm 2 .
  • the gear housing has two diametrically opposed socket-shaped extensions. Each of the two extensions forms two mutually pioneering Mit videflanken.
  • the flywheel mass achieves its optimum effect in the Schnellschraub ein, it is neutralized in Kraftschraub ein so to speak, since it is located close to the axis of rotation.
  • the flywheel is preferably formed by pointing radially outward bulges. These bulges leave between each grip recesses. The fingers of the user's hand can be placed in these grip recesses when the screwing tool is used in the force screwing position. The user's hand then rests on the bearing body, which rotates the gear head. The fingers engage in the recessed grips.
  • the screwing tool can also be operated with one hand in the force screwing position, namely by means of the hand comprising the gear head, whose fingers engage in the grip recess.
  • the center of gravity in the near-third of the head the drive arm is located.
  • the center of gravity is preferably in the region of the handle-side end of the flywheel mass accumulation. He can also be arranged between the flywheel itself and rotatable sleeve.
  • the drive arm can be fixed by means of latching means either in the Kraftschraub ein or in the Schnellschraub ein.
  • the latching means are preferably those which can be solved only intentionally from each other.
  • the locking means comprise locking recesses.
  • a detent recess can be arranged in the apex region of a dome-shaped direction of rotation reversal switch. Further locking recesses are located in a position offset by 90 ° about the pivot axis in the area of a ring housing.
  • the shaft of the drive arm preferably supports a bolt slide. This locking slide has a locking projection, which rests in the locking position in one of the locking recesses.
  • the locking means may be arranged in the drive arm, be displaceable in its direction of extension locking pin.
  • the locking pin can eino in an axial bore of the drive arm. It can be moved against the restoring force of a spring from its detent position to its release position.
  • a slide button is preferably used. This can sit directly adjacent to the gear head on a broad side of a widening of the drive arm.
  • two sliding buttons are provided, which are located on the opposite broad sides of the drive arm. These sliding buttons can be connected to each other by means of connecting webs or connected to the locking pin.
  • the transmission housing preferably has a substantially circular outer wall. On the outer wall there are two diametrically opposite bearing openings in which journals stuck.
  • the pivot axis formed by the two pivot pins intersects the output axis of rotation substantially at right angles.
  • the gear housing is connected to the ends of arcuate teeth of the drive arm.
  • the two prongs form a transmission fork comprehensive mounting fork.
  • the end of the locking pin protrudes into the fork space.
  • the locking pin can be pulled out of the fork gap by the two movement-coupled sliding buttons.
  • the gear head forms a dome.
  • the surface of the dome is part of a spherical surface. In the dome are a plurality of locking recesses into which the end of the locking pin can enter to fix the gear head in different pivotal positions relative to the drive arm.
  • a first pivot position which corresponds to a Schnellschraubposition
  • the contour axis of the drive arm is located in the output axis of rotation.
  • On the end of the drive arm is a screwdriver handle. If this is rotated about its contour axis, the output square of the gear head is rotated about its output axis of rotation.
  • the gear head can now be pivoted about the pivot axis, for example. In an intermediate position in which the output rotational axis occupies a 45 ° position to the contour axis of the drive arm.
  • the gear head can also be further pivoted to a 90 ° position, in which the drive arm is in a Kraftschraub too to the drive axis of rotation.
  • the contour axis of the drive arm is now pivoted by 90 ° with respect to the output axis of rotation.
  • the locking recess in which the locking pin engages in this position, is located in the annular gear housing.
  • This latching recess lies in the same plane in which a diametrically opposite latching recess and the two bearing journals are located.
  • the dome not only serves to switch the direction of rotation of the ratchet or freewheel gear.
  • the dome can also be displaced in the axial direction with respect to the output axis of rotation.
  • the release slide is part of a captive device for a nut or the like, which can be plugged onto the output square.
  • the dome can be relocated using one of the two sliding buttons.
  • the sliding button arranged near the fork root is displaced in the opposite direction, that is to say on the fastening fork, as a result of which the locking pin is pressed deeper into the latching recess of the dome. He acts on the bottom of the locking recess and moves the dome in the axial direction of the output axis of rotation to relocate the release slide.
  • the latter cooperates with a detent ball, which cooperates in a corresponding latching recess of a wall of an insertion opening of the nut.
  • the locking pin is held by two counteracting compression springs in a neutral position, from which it can be moved either in a release position for pivoting the gear head or to release the captive device.
  • the detent ball lies in front of a wall of the release slide.
  • the release position the detent ball can escape radially inwards.
  • the release slider has a pocket.
  • the ball is displaced by an oblique side wall of the bag again radially outward.
  • the dome of the gearhead forms a direction switch for the freewheel gear.
  • a radially outer portion of the dome may form a corrugation. This section is accessible in any pivoting position of the gear head, so that the whilsgesperre can be switched in each pivot position.
  • the fork tines which form the gear head bearing mount, nestle with their inner facing surfaces facing each other flat against the convex outer surface of the gear housing. For this purpose, the inner edges of the forks are designed dome-shaped. During installation, the gear head can be bent into this ball bearing. The forks are rigidly assigned to each other. This allows the application of maximum torque on the output square.
  • ratchet In the embodiment shown in the figures is a ratchet, wherein the ratchet head forms a freewheel gear 2.
  • the gear housing forms a ring 36, protrude from the diametrically opposite bearing extensions 33.
  • the pivot axis 8 defined by the bearing extensions 33 intersects the axis of rotation of the freewheel transmission 2 defined by the output square 4.
  • the drive arm 3 has at its free end a screwdriver handle 7. From the screwdriver handle protrudes a fork-shaped shaft.
  • the two fork legs 32 of the shaft form at their ends two arms 32 ', the one Leave cavity between them, which corresponds to the peripheral contour of the ring housing 36.
  • the two fork legs 32 are slightly spaced from each other. In the distance space between the two fork legs 32 is a latch slide 21 which extends over the entire length of the shaft of the drive arm 3.
  • a in the between the arms 32 'arranged receiving opening for the freewheel gear 2 projecting portion 21' of the bolt slide 21 forms a latching extension, which can occur in a locking position in one of the locking recesses 28, 29 of the freewheeling gear 2.
  • a two fork legs 32 interconnecting screw 31.
  • the threaded shaft 31 'of the screw 31 passes through the space between the two fork legs 32 and a slot 30 of the latch slide 21.
  • the latch slide 21 can against the Restoring force of a compression spring, not shown, are displaced by means of an actuating button, not shown, in the direction of the screwdriver handle portion 7.
  • the actuation can be done from the end of the handle 7.
  • the housing of the freewheel gear 2 has a total of three locking recesses 29, 28. All latching depressions 28, 29 are equally spaced from the pivot axis 8. Two locking recesses 28 are diametrically opposite each other in relation to the pivot axis 8 in a 180 ° -Abstandswolf and are associated with the annular housing 36.
  • the shaft which is formed by the two bearing extensions 32, has a circular outer cross-section. On this circular section, which adjoins directly to the screwdriver handle 7, a sleeve is rotatably mounted.
  • the sleeve may be assigned to the shaft axially fixed.
  • FIGS. 7 to 10 illustrated further embodiment also relates to a screw with pivotable drive arm, wherein the pivot positions are locked in at least one Schnellschraub ein and a Kraftschraubgna.
  • the detent openings 28, 29 associated with a bracket 35 which engages over the reversing switch 12 and spans this at a distance.
  • the bracket 35 extends over a semicircular arc within the fork mouth formed by the arms 32 '.
  • On the bracket 35 are each offset by 30 ° angular locking further locking recesses 34, so that the drive arm 3 can be locked in insectsschwenk einen.
  • FIGS. 11 to 13 show an extension piece 101, which consists of steel. It has a shaft 104 with a circular cross-section. One end of the shaft 104 is formed as a square 102. In one of the square surfaces of the square section 102 is a detent ball 107, which protrudes partially over the square surface. Against the restoring force of a spring, this detent ball 107 can be displaced in the polygonal surface.
  • the other end of the shaft 104 forms a square cavity 103.
  • a square according to the design of the square 102 can be in the square cavity 103 are inserted.
  • the detent ball 107 can dive into a recess 106 of one of the polygonal surfaces of the square cavity 103.
  • On the cross-sectional circular shaft sits a rotatable sleeve 105. While the shaft 104 is made of steel, the sleeve 105 may be made of plastic.
  • the sleeve 105 has a corrugated outer surface and a cavity whose diameter is slightly larger than the outer diameter of the shaft 104.
  • the sleeve 105 is axially fixed but rotatably tied to the shaft 104.
  • the shaft has for this purpose an annular groove in which a bearing ring 108 rests.
  • a radially outwardly facing portion of the bearing ring 108 protrudes into a circumferential groove of the inner wall of the cavity of the sleeve 105th
  • the sleeve 105 serves to hold the extension piece 101 during the screwing operation.
  • the output square 4 of a freewheel gear of a screwing tool can be inserted according to one or more of the preceding embodiments.
  • an axial force can be applied in the direction of the polygon 102, which can be inserted into a corresponding polygonal opening of a nut.
  • extension piece is combined with a screwing tool, as described above or as will be described below. It can be used both in the Schnellschraub too and in the Kraftschraub too.
  • the user can hold the extension piece with one hand on the sleeve 105.
  • the ratchet wrench can either be rotated in the quick screw or pivoted in the Kraftschraub too. Since the ratchet wrench has a high mass, it can be imposed in the Schnellschraub ein by twirling the handle an angular momentum.
  • the screwing in the Schnellschraub ein perform a variety of free rotations.
  • the use of the sleeve 105 reduces the friction, so that a single rotary drive by the user's hand is sufficient to allow the screwing tool then perform several revolutions freely about its axis.
  • FIGS. 14-21 show a ratchet wrench with pivoting gear head 205.
  • the gear head 205 has a drive square 204, which may have the dimension 1 ⁇ 4 inch, 3 ⁇ 8 inch or 1 ⁇ 2 inch.
  • the output square 204 defines an output rotational axis 201.
  • the output square 204 may be inserted into a square opening of a nut or other torque transmitting tool.
  • From one of the four walls of the output four-square 204 protrudes a detent ball 220.
  • the detent ball 220 is supported in their in the Fig. 16 shown Fesselungs ein on a wall portion of a release slide 221, which is located within the output square 204.
  • the release slide 221 is slidably mounted in an axial cavity of the output drive quadrant 204.
  • the output square 204 is firmly connected to a freewheel gear 202 of the gear head 205, not shown in detail.
  • the freewheel gear 202 is located within a ring clearance, which is formed by a transmission housing 212.
  • the transmission housing 212 has a substantially annular shape.
  • On the opposite side of the transmission housing 212 to the output square 204 is a switching dome 219. This can be made of metal or plastic.
  • the transmission housing 212 is preferably as well as the output square 204 made of steel.
  • the switching dome 219 can be rotated about its switching axis, which coincides with the driven rotational axis 201, in order to change over the blocking direction or the free-wheeling direction of the merely indicated freewheeling gear 202.
  • the freewheel gear 202 has a ratchet mechanism or the like, which allows a rotation of the output four-square 204 in one direction and locks in the other direction.
  • the dome 219 can also be axially displaced in the direction of the output axis 201 beyond. This is done against the restoring force of a compression spring 224.
  • the release slide 221 is moved from its bondage position to its release position.
  • the release slide 221 is immovably connected to the dome 219.
  • the dome 219 is located in a bearing recess of the transmission housing 212 with a corresponding Axialambasabilauf.
  • the gear housing 212 has two diametrically opposite latching recesses 210. Between the two latching recesses 210 has the gear housing 212 bearing openings in which bearing pins 223 stuck.
  • the bearing pins 223 define a pivot axis 208 which intersects the output rotational axis 201 at right angles.
  • the attachment fork is formed by two arcuate fork tines 217.
  • the inner wall of the forks 217 is dome-shaped. The inner wall of the forks 217 thus nestles in the in the Fig. 19 shown Kraftschraub ein essentially flush with the surface of the transmission housing 212.
  • the dome 219 has in its vertex a latching recess 209. Between the latching recess 210 of the gear housing 212 and the central latching recess 209, a further latching recess 211 is arranged. This is also associated with the transmission housing 212. Further locking recesses could also be provided in the area of the switching dome 219.
  • the immediately adjacent to the root of the mounting fork portion of the drive arm 203 is widened.
  • this widened section is a slide button 213. It is located on each of the two pioneering broad sides of this section a slide button 213.
  • the area between the handle 207 and the widened portion of the drive arm 203 has a circular narrower cross-section.
  • the two sliding buttons 213 have connecting webs 218 which reach into a passage opening 222. With the connecting webs 218, the two sliding buttons 213 are interconnected.
  • the connecting webs 218 are offset laterally and axially offset from one another. They can form unillustrated hooks to lock the two opposing sliding buttons 213 together.
  • the connecting webs 218 overlap each other.
  • the connecting webs 218 also form a positive locking driving coupling with the locking pin 206 so as to be able to displace it in the direction of its axis.
  • Each of the two sliding buttons 213 is located in a recess 216 of the flat portion of the drive arm 203rd
  • the slide button 213 engages with its connecting web 218 on the locking pin 206.
  • the connecting web thus forms the connection between slide button 213 and locking pin 206.
  • On both sides of the connecting web 218 are compression springs.
  • a first compression spring 214 must be compressed to pull the locking pin 206 out of one of the locking recesses 209, 210 or 211.
  • the other compression spring 215 is compressed by an opposite displacement of the slide button 213.
  • the compression springs 214, 215 are each supported on the connecting webs 218 and on the wall of the through opening 222.
  • the locking pin 206 is pressed deeper into the fork gap or in the locking recess 209. If the locking pin 206 pressed into this the vertex of the dome 219 associated locking recess 209, the dome 219 is displaced.
  • the release slider 221 is shifted to its release position.
  • the two springs 214, 215 hold the slide button 213 or both slide buttons 213 in a middle neutral position, from which they can be displaced in each opposite direction of actuation in the extension direction of the drive arm 203 to either release the detent ball 220 or to release the pivoting of the gear head 205 ,
  • the two push buttons 213 can be moved by the thumb of the hand of the actuator.
  • the two sliding buttons 213 are therefore preferably in the immediate vicinity of the gear head 205, ie at the handle 207 opposite end of the drive arm 203.
  • slide button 213 the bondage of the gear head 205 and the locking of a nut in each pivot position of the drive arm 203rd be solved. This is done with a single actuator, namely the slide button 213.
  • the displacement of the slide button 213 takes place in the direction of the output axis of rotation 201.
  • the bottom of the recess 216 is located in a plane parallel to the plane in which the forks 217 lie.
  • the drive arm 203 is circular-cylindrical in shape and surrounded by a rotatable sleeve 226.
  • the rotatable sleeve 226 may be made of plastic. It is the drive arm 203 axially fixed but rotatably associated. In the embodiment, the rotatable sleeve 226 has a corrugation. This sleeve can be used by a user's hand in the Fig. 16 shown Schnellschraub ein be included. With the other hand, the user can transmit a rotary motion to the handle 207. The user transmits an angular momentum to the screwing tool.
  • the screwing tool Since essential elements of the screwing tool are made of steel, it has a large flywheel. The user is thus able to apply a relatively high angular momentum to the screwing tool transferred to. The screwing tool can thus perform a variety of rotations after applying a single "swing".
  • the flywheel 225 is formed here by outwardly facing bulges of the handle body. These bulges are immediately adjacent to the forks 217. According to this radially outer mass accumulation, which forms the flywheel 225, the screwing in the in Fig. 26 shown Schnellschraub ein be imposed an increased angular momentum. This angular momentum is transmitted to the screw to be screwed.
  • the screwdriver can rotate freely while being held by the user on the rotatable sleeve 226.
  • the gear head 205 has two diametrically opposite, the transmission housing 212 associated radial extensions 227.
  • each radial extension 227 has two driving flanks 228.
  • the radial recess 227 which is inserted in the opening of the fork base, rests with its two driving flanks 228 on driver stages 229, which are formed by side walls of the recess of the fork base.
  • the two driver flanks 228 and the two driver stages 229 are preferably located on parallel planes.
  • FIG. 22 can be seen, a total of three bulges 230 on each of the two narrow sides of the handle head, which forms the flywheel 225, are provided. Between the individual bulges 230 extend Handholds 231. These handholds have a width that is sufficiently large that the finger of a hand forming the flywheel 225 can engage therein. There are a total of two by a central curvature 230 separate recessed grips 231 provided. In the in Fig. 22 shown Kraftschraub ein the flywheel 225 forming head can be covered by the hand of a user. The hand also includes the gear head 225 at the same time. For fast rotation of the output rotation axis 201, the handle 207 need not be included. This can pivot freely when turning fast.
  • the center of gravity of the entire screwing tool is in the driven-side third of the drive arm 203.
  • the center of gravity is in the region between head 225 and rotatable sleeve 226th
  • the handle 207 has a rotational symmetry. It can then be rotationally driven by the thumb, forefinger and middle finger of a user's first hand, while the user's second hand includes the rotatable sleeve 226. In this way, the screwing tool an angular momentum can be imposed so that it can perform several revolutions consecutively freely.
  • the dome-shaped configuration of the changeover switch 219 and the ribs or grooves provided on the dome surface make it possible for the direction of rotation of the freewheeling transmission 202 to be changed over in every pivoting position of the gearhead 205.
  • An essential feature of the invention is therefore u.a. also the fact that the freewheel gear 202 is switchable in each pivot position of the gear head 205.
  • the drive arm is multi-part. Its essential components are a steel body, which forms the two forks 17 and 217 and a circular cylindrical shaft for supporting the rotatable sleeve 26 and 226th Der Steel body, which may be a hardened forging, also carries the locking device for the gear head and at its free end the plastic handle 207. The latter can be attached to the free end. It can also be sprayed onto the free end by injection molding.
  • the steel body is designed in such a way that its mass moment of inertia about the contour axis, which coincides with the axis of rotation in the rapid screwing position, is very high, ie above a minimum value.
  • the flywheel masses are arranged so close to the bearing fork for the gear head, that the moment of inertia of the steel body to a perpendicular to the contour axis through the fork axis, which corresponds to the axis of rotation in the Kraftschraub ein is minimized, that is below a maximum value.
  • the sleeve 226 and 105 respectively axially fixed to the drive arm 203 and the shaft 104 is attached. It is essential that the sleeve 226 or 105 is rotatably mounted on the drive arm 203 or shaft 104. In a non-preferred embodiment, it can also be associated axially displaceably with the drive arm 203 or the shaft 104.
  • the bearing of the sleeve 226,105 can be done both via a sliding bearing and a ball bearing.
  • the flywheel masses 225 are each firmly connected to the drive arm 203.
  • the flywheel masses can also be assigned to the drive arm 203 so as to be radially displaceable or pivotable. They can not only be arranged immediately adjacent to the drive head. It is also possible to arrange the flywheels at the free end of the handle. This is particularly advantageous if the flywheel masses can be displaced from a radially inner to a radially outer position. The latter can be performed by moving or pivoting the movable masses associated with the drive arm.
  • the centrifugal masses can also be assigned to the drive arm in such a way that they are automatically displaced by the centrifugal force in a position increasing the moment of inertia. This can be done against a return spring.

Claims (14)

  1. Outil de vissage avec une tête de transmission (205) et un bras d'entraînement (203), la tête de transmission (205) formant un boîtier de transmission (212), dans lequel est disposé un mécanisme à roue libre ou à cliquet (202) avec un axe de rotation entrainé (201), une face frontale de la tête de transmission (205) présentant un couplage d'entraînement (204), en particulier avec une forme polygonale, et le bras d'entraînement (203) étant apte à pivoter autour d'un axe de pivotement (208), s'étendant sensiblement transversalement à l'axe de rotation entrainé (201), depuis une position de vissage rapide, dans laquelle le bras d'entraînement (203) se situe dans l'axe de rotation entrainé (201), vers une position de vissage à force, dans laquelle le bras d'entraînement (203) s'étend sensiblement transversalement à l'axe de rotation entrainé (201), et peut être immobilisé dans les deux positions de pivotement à l'aide de moyens de cliquet (206), le moyen de cliquet (206) pouvant être déplacé par un organe d'actionnement (213) associé au bras d'entraînement (203) depuis une position encliquetée dans une position débloquée, comportant deux masses d'inertie (225) diamétralement opposées, associées au bras d'entraînement (203), caractérisé par une gaine (226) rotative associée au bras d'entraînement (203).
  2. Outil de vissage selon la revendication 1, caractérisé en ce que le bras d'entraînement (203) comporte un corps métallique réalisé en particulier en acier, qui forme une fourche de support, formée par des dents de fourche (217) pour le montage de la tête de transmission (205), un tronçon de tige pour le montage de la gaine (226) et une zone d'extrémité pour fixer la poignée (207), les masses d'inertie (225) étant disposées à proximité de la fourche de support (217), de telle sorte que les valeurs du couple d'inertie des masses du corps métallique par rapport à l'axe de rotation entrainé (201) se situent au-dessus d'une valeur minimale dans la position de vissage rapide, la valeur minimale avec un outil de vissage étant de l'ordre de 30 kg mm2, 40 kg mm2 ou 45 kg mm2 pour un couplage d'entraînement de ½ pouce, de 15 kg mm2, 20 kg mm2 ou 25 kg mm2 pour un couplage d'entraînement de 3/8 de pouce et de 3 kg mm2, 4 kg mm2 ou 4,5 kg mm2 pour un couplage d'entraînement de 1/4 de pouce.
  3. Outil de vissage selon l'une quelconque des revendications précédentes, caractérisé en ce que la gaine (226) rotative est associée, de manière fixe axialement, au bras d'entraînement (203) et est montée selon un montage sur roulements à billes ou un montage à glissement.
  4. Outil de vissage selon l'une quelconque des revendications précédentes, caractérisé en ce que les masses d'inertie (225) sont constituées par des bossages (230) de la poignée, dirigés dans le sens radial vers l'extérieur, en particulier avec des creux pour les doigts disposés entre les bossages (230) dirigés radialement vers l'extérieur.
  5. Outil de vissage selon l'une quelconque des revendications précédentes, caractérisé en ce que le centre de gravité de l'outil de vissage se situe dans le tiers, proche de la tête, du bras d'entraînement (203) et se situe en particulier entre la gaine (226) rotative et la masse d'inertie (225).
  6. Outil de vissage selon l'une quelconque des revendications précédentes, caractérisé en ce que la poignée (207) possède une symétrie de révolution.
  7. Outil de vissage selon l'une quelconque des revendications précédentes, caractérisé en ce que le bras d'entraînement (203), dans sa position de vissage rapide, dans laquelle le bras d'entraînement (203) se situe dans l'axe de rotation entraîné (201), et dans sa position de vissage à force, dans laquelle le bras d'entraînement (203) se situe sensiblement transversalement à l'axe de rotation entrainé (201), peut être immobilisé dans chaque cas par des moyens de cliquet (206) sur la tête de transmission (205), le moyen de cliquet (206) pouvant être déplacé par un organe d'actionnement (213), associé au bras d'entraînement (203), depuis une position encliquetée vers une position débloquée, le moyen de cliquet étant une cheville de verrouillage (206) disposée dans le bras d'entraînement (203) et déplaçable dans le sens d'extension de celui-ci, et le couplage d'entraînement (204) comporte un dispositif de blocage (220, 221) pour une douille ou élément similaire pouvant être accouplé à celui-ci, lequel peut être amené d'une position de blocage dans une position de déblocage sous l'effet de l'actionnement de l'organe d'actionnement (213) dans la position de vissage à force.
  8. Outil de vissage selon la revendication 7, caractérisé en ce que l'organe d'actionnement est un bouton coulissant (213) déplaçable dans le sens d'extension du bras d'entraînement (203) dans le sens opposé à la force de rappel d'un ressort (214).
  9. Outil de vissage selon l'une quelconque des revendications précédentes, caractérisé en ce que le boîtier de transmission (212) comporte une paroi extérieure sensiblement circulaire qui, à deux emplacements diamétralement opposés, est montée entre les extrémités des dents de fourche (217) du bras d'entraînement (203).
  10. Outil de vissage selon l'une quelconque des revendications 7 à 9, caractérisé en ce que l'organe d'actionnement comporte deux boutons coulissants (213) face à face qui, par l'intermédiaire de traverses de liaison (218), sont reliés à la cheville de verrouillage (206) située entre lesdits boutons.
  11. Outil de vissage selon la revendication 10, caractérisé en ce que la cheville de verrouillage (206) ou l'organe d'actionnement (213) sont maintenus de manière flottante dans une position neutre entre deux ressorts (214, 215).
  12. Outil de vissage selon l'une quelconque des revendications précédentes, caractérisé par un couplage (219), qui est opposé au couplage d'entraînement (204) et qui constitue en particulier, pour le mécanisme à roue libre ou à cliquet (202), un commutateur de direction accessible dans chaque position de pivotement du bras d'entraînement (203).
  13. Outil de vissage selon l'une quelconque des revendications 7 à 12, caractérisé en ce que le dispositif de blocage (220, 221) peut être amené dans la position de déblocage sous l'effet d'une pression axiale sur l'organe d'accouplement (219).
  14. Outil de vissage selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface périphérique bombée de la tête de transmission (205) est en appui plan contre les parois intérieures en forme de calotte des dents de fourche (217), et des saillies radiales (227), des flancs d'entraînement (228) sont réalisés en s'avançant en saillie depuis le boitier de transmission (212) respectivement dans des directions diamétralement opposées entre elles, et sont en appui contre des épaulements d'entraînement (229) correspondants des dents de fourche (217).
EP08701351.2A 2007-02-01 2008-01-09 Outil de vissage comprenant un mecanisme de roue libre Active EP2134513B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09172019.3A EP2135714B1 (fr) 2007-02-01 2008-01-09 Outil de vissage comprenant un mécanisme de roue libre

Applications Claiming Priority (3)

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DE102007004987 2007-02-01
DE102007049304.7A DE102007049304B4 (de) 2007-02-01 2007-10-15 Schraubwerkzeug mit Freilaufgetriebe
PCT/EP2008/050187 WO2008092717A2 (fr) 2007-02-01 2008-01-09 Outil de vissage comprenant un mécanisme de roue libre

Related Child Applications (3)

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EP09172019.3A Division-Into EP2135714B1 (fr) 2007-02-01 2008-01-09 Outil de vissage comprenant un mécanisme de roue libre
EP09172019.3A Division EP2135714B1 (fr) 2007-02-01 2008-01-09 Outil de vissage comprenant un mécanisme de roue libre
EP09172019.3 Division-Into 2009-10-02

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EP2134513B1 true EP2134513B1 (fr) 2015-11-11

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EP (2) EP2134513B1 (fr)
JP (1) JP5202542B2 (fr)
CN (1) CN101657302B (fr)
AU (1) AU2008209883B2 (fr)
CA (1) CA2677166C (fr)
DE (1) DE102007049304B4 (fr)
HK (1) HK1133620A1 (fr)
WO (1) WO2008092717A2 (fr)

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Also Published As

Publication number Publication date
AU2008209883A1 (en) 2008-08-07
HK1133620A1 (en) 2010-04-01
EP2135714A2 (fr) 2009-12-23
AU2008209883B2 (en) 2013-04-18
WO2008092717A3 (fr) 2009-06-04
EP2135714B1 (fr) 2015-07-01
JP2010517793A (ja) 2010-05-27
CN101657302B (zh) 2012-12-19
WO2008092717A2 (fr) 2008-08-07
JP5202542B2 (ja) 2013-06-05
EP2134513A2 (fr) 2009-12-23
CN101657302A (zh) 2010-02-24
CA2677166C (fr) 2014-12-02
US20100058896A1 (en) 2010-03-11
CA2677166A1 (fr) 2008-08-07
DE102007049304B4 (de) 2020-09-03
EP2135714A3 (fr) 2010-09-01
US7878091B2 (en) 2011-02-01
DE102007049304A1 (de) 2008-08-07

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