EP2732920A1 - Mécanisme à cliquet - Google Patents

Mécanisme à cliquet Download PDF

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Publication number
EP2732920A1
EP2732920A1 EP20130005051 EP13005051A EP2732920A1 EP 2732920 A1 EP2732920 A1 EP 2732920A1 EP 20130005051 EP20130005051 EP 20130005051 EP 13005051 A EP13005051 A EP 13005051A EP 2732920 A1 EP2732920 A1 EP 2732920A1
Authority
EP
European Patent Office
Prior art keywords
ratchet
toothing
tool
rotary member
rotation
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.)
Granted
Application number
EP20130005051
Other languages
German (de)
English (en)
Other versions
EP2732920B1 (fr
Inventor
Marco Theissen
Hans-Joachim Mehlau
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.)
Stahlwille Eduard Wille GmbH and Co KG
Original Assignee
Eduard Wille 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 Eduard Wille GmbH and Co KG filed Critical Eduard Wille GmbH and Co KG
Publication of EP2732920A1 publication Critical patent/EP2732920A1/fr
Application granted granted Critical
Publication of EP2732920B1 publication Critical patent/EP2732920B1/fr
Not-in-force 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
    • 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
    • B25B13/466—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in an axial direction

Definitions

  • the invention relates to a ratchet tool having a tool head, the tool head having an insert coupled to a ratchet mechanism for transmitting torque, and a socket insert or socket attachment on or in the socket or a screw is plugged.
  • ratchets are used in mechanical and tool engineering, especially in assembly technology. For example, screws can be tightened and loosened with ratchets.
  • the ratchets usually have a lever and a tool head.
  • the tool head of the ratchet can accommodate a socket insert. If the tool head directly receives a screw, one speaks also of ratchet wrenches.
  • ratchet wrenches Through the combination of two pawls, which transmits a pivoting movement of the lever in one direction only, is automatically locked during a movement in the opposite direction.
  • there are also ratchets that are operated in addition to the purely mechanical versions, to facilitate work with compressed air or electric. In a confined space or very high power input are also hydraulically driven ratchet used.
  • the ratchet or ratchet is a tool for generating a rotating rotary movement within a limited work space, usually for loosening or tightening screw.
  • a rotation angle of at least 10 to 15 degrees is required to achieve a rotation of a drive square.
  • Special fine ratchets have such a fine toothing that already a rotation angle of about 5 degrees is sufficient, so that even under extremely tight conditions screws and nuts can be moved. "Free-wheeling catches" are doing without any screening.
  • the known ratchet mechanisms have a rotating part with radial external toothing.
  • a blocking element with a radial toothing engages radially in this external toothing of the rotating part.
  • the locking element allows the rotary member to rotate only in one direction. By a switching mechanism, it can be rotated in the other direction accordingly. In the respective blocking direction, the torque is transmitted from the ratchet to the workpiece, such as a screw, for tightening or for releasing.
  • a ratchet with a ratchet lever in which a ratchet wheel is mounted, which is preferably connected to an additional, continuously acting drive.
  • On the side of the ratchet lever are an upper and a lower stop.
  • a shift drum is rotatably mounted in the ratchet lever.
  • the ratchet lever has a hydraulically actuated ball detent lock and a locking piece for a second locking mechanism.
  • the known ratchet or ratchet tools have a radial external toothing. Also, the blocking element is arranged radially. As a result, the tool head requires a certain size to ensure the function of the ratchet mechanism. disadvantage is therefore that the tool head is dimensioned relatively large. This makes hard-to-reach fittings with such tools practically unattainable.
  • the object of the invention is therefore to provide a ratchet that eliminates the disadvantages of the prior art. It is also a concern of the invention to provide a tool head for a ratcheting or ratchet tool with a small amount, in order to get to difficult to access fittings well. There are no losses in terms of functionality due to the smaller dimensions compared to conventional ratchet tools arise.
  • the object is achieved in that in a ratchet or ratchet tool of the type mentioned the ratchet mechanism has a rotary part for transmitting torque, which has on its front side a toothing, in which engages a locking element.
  • the invention is based on the principle that the blocking element is no longer to be arranged radially relative to the rotating part. As a result, no radial external toothing is needed. Here, therefore, smaller diameter can be achieved in the rotary part.
  • the locking element and the teeth were in a radial plane
  • the present ratchet mechanism is arranged on the end face of the rotary member. This allows a much more compact design can be achieved. The effect and function of the ratchet mechanism is thereby affected by this design in any way.
  • the blocking element is spring-loaded.
  • the blocking element is pressed against the teeth on the front side due to the spring force.
  • the ratchet mechanism is designed so that the rotating part can only rotate in one direction. When turning in the other direction, a torque is transmitted to the toothing of the rotating part via the blocking element.
  • the spring force causes the blocking element to remain in contact with the toothing for transmitting power.
  • a preferred embodiment of the ratchet tool or ratchet tool according to the invention is that the blocking element has at least one tooth, which engages in the frontal toothing of the rotary member. This measure serves to ensure that the blocking element can engage precisely in the toothing. In this case, several teeth can be provided simultaneously. The number of teeth depends in particular on the forces to be transmitted. The teeth are preferably designed so that they fit the contour of the toothing on the front side of the rotating part.
  • a further advantageous embodiment of the ratchet tool or ratchet tool according to the invention is achieved in that the toothing of the rotary member cooperates with the locking element due to their geometry such that only one direction of rotation is made possible. This measure causes only one direction of rotation for the rotating part of the ratchet mechanism is allowed. The other direction of rotation is locked and eventually used for power transmission.
  • a preferred embodiment of the ratchet tool according to the invention is further achieved by the ratchet mechanism arranged in a housing and / or a lever for power transmission is provided for the ratchet mechanism.
  • the ratchet mechanism is thus protected against contamination.
  • a lever transmits the force to the ratchet mechanism. A user then does not need so much force to manually tighten a screw, for example.
  • ratchet tool Another advantageous aspect of the ratchet tool according to the invention is obtained by providing a switching mechanism for changing the direction of rotation.
  • the switching mechanism Through the switching mechanism, the ratchet and ratchet tool can be rotated in both directions for power transmission. By simply switching the direction of rotation or the reverse direction of the rotary part be determined. The tool can then be used for both tightening and loosening screws without having to turn it.
  • a toothing for a right and a toothing for a left-hand rotation is provided on an end face of the ratchet tool according to the invention or Ratchet tool.
  • the blocking elements or the teeth must be designed accordingly for this purpose in terms of their geometry. It must lock a blocking element in one direction of rotation and another blocking element in the other direction of rotation of the rotating part. These locking elements are then activated depending on the position of the switching mechanism. This allows the ratchet to turn either in one direction or in the other direction.
  • the toothing may also be provided on both end faces of the rotary part.
  • an end face of the rotary member is provided with a toothing for a clockwise rotation in the ratchet tool or ratchet tool according to the invention.
  • a toothing for a counterclockwise rotation is provided accordingly.
  • the respective blocking element must be designed in a suitable manner.
  • the direction of rotation can be determined. This measure also makes it possible to make the teeth small for each direction of rotation. This makes it possible to achieve very low angles of rotation when tightening or loosening screws.
  • the blocking element is annularly formed with a toothing, wherein the toothing of the blocking element engages in the frontal toothing of the rotary part for torque transmission.
  • a ratchet tool according to the invention is called.
  • the ratchet or ratcheting tool 10 is hereinafter called only ratchet tool.
  • a cutaway tool head 12 of the ratchet tool 10 can be seen from the side.
  • the tool head 12 has a substantially cylindrical head housing 14.
  • the lever 16 usually has an ergonomic handle for easier operation, which is not shown here.
  • a ratchet mechanism 13 is provided with a rotary member 18.
  • the rotary member 18 is rotatably supported in the head housing 14.
  • the rotary member 18 has end faces 20, 22.
  • On the front side 20 is a toothing 24.
  • the toothing 24 is formed like a sawtooth, i. the geometry of the profile of the toothing 24 has a vertical 26 and an oblique edge 28.
  • the ratchet mechanism 13 further includes spring-loaded locking elements 30.
  • the locking elements 30 are tooth-shaped.
  • the spring-loaded locking elements 30 engage in the toothing 24 of the rotary member 18.
  • Cover 32 of the head housing 14 is slightly stronger.
  • holes 34 may be provided, in which the locking elements 30 are arranged.
  • coil springs 36 are also provided for the spring load of the locking elements.
  • the blocking elements 30 are designed such that they fit into the contour of the toothing 24.
  • a substantially vertical surface 38 of the locking element 30 comes into contact with the vertical edge 26 of the toothing 24.
  • Vertical here means: substantially parallel to the axis of rotation 39 of the rotary member 18.
  • a likewise inclined surface 40 of the locking element 30 with the oblique edge 28 of the toothing 24 of the rotary member 18 fits.
  • the rotary member 18 can only rotate in one direction of rotation, namely only on the inclined edges 28.
  • the other direction of rotation is provided for transmitting a torque for the ratchet tool 10.
  • the blocking elements 30 are arranged stationary relative to the head housing 14, while the rotating part 18 can rotate in the head housing 14 at least in one direction.
  • Fig. 2 shows the tool head 12 accordingly Fig. 1 in a three-dimensional view. Also the view of Fig. 2 is shown cut. If the same components are described as in Fig. 1 , corresponding reference numerals are also chosen.
  • the rotary member 18 is rotatably supported in the head housing 14.
  • the rotary member 18 is hollow inside. This gives the rotary member 18 inner surfaces 42.
  • the inner surfaces form a star-shaped inner profile 44, in which suitable plug-in inserts or screws can be used.
  • the sockets or screws are not shown here.
  • the sawtooth-shaped toothing 24 in profile is arranged on the end face 20 of the rotary part 18. In the toothing 24, the spring-loaded locking elements 30 engage.
  • FIG. 3 the operation of the ratchet tool 10 becomes clearer.
  • a section of the rotary member 18 is shown.
  • On the front side 20 of the rotary member 18 is a partial view of the sawtooth toothing 24.
  • the locking element 30 is spring-loaded with the coil spring 36 in the bore 34 of the cover 32 is provided.
  • the contour of the blocking element 30 is cylindrical, wherein the cylinder is cut obliquely in the lower region. As a result, the contour of the blocking element 30 can adapt to the profile of the sawtooth-shaped toothing 24.
  • this enlarged detail view of the FIG. 3 it is clear that the rotary member 18 can move freely only to the left.
  • the toothing 24 pushes namely through the inclined surface 40 of the locking element 30 against the spring force of the coil spring 36 therethrough.
  • the rotation to the right is prevented by the blocking element 30.
  • the vertical surfaces 38 of the locking member 30 prevent with the vertical edge 26 of the toothing 24 a clockwise rotation of the rotary member 18.
  • a torque on the head housing 14, which is connected to the lever 16 be placed on the rotary member 18.
  • the rotary member 18 transmits the torque by means of a socket wrench, not shown here turn on a workpiece, such as a screw.
  • a tool head 46 is shown as an exploded view.
  • the torque is transmitted to the rotary member 18 with an annular locking member 48.
  • the locking element 48 is to rotatably within a housing 49 of the tool head 46.
  • Teeth 50 of the locking element 48 form a sawtooth toothing 52, which engages in the toothing 24 on the end face 20 of the rotary member 18.
  • the annular locking element 48 is biased by a coil spring 51.
  • the toothing 24 of the rotary member 18 is also formed like a sawtooth.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP13005051.1A 2012-11-15 2013-10-23 Mécanisme à cliquet Not-in-force EP2732920B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202012104413U DE202012104413U1 (de) 2012-11-15 2012-11-15 Ratschen- und Knarrenmechanismus

Publications (2)

Publication Number Publication Date
EP2732920A1 true EP2732920A1 (fr) 2014-05-21
EP2732920B1 EP2732920B1 (fr) 2015-09-09

Family

ID=47427058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13005051.1A Not-in-force EP2732920B1 (fr) 2012-11-15 2013-10-23 Mécanisme à cliquet

Country Status (3)

Country Link
EP (1) EP2732920B1 (fr)
DE (1) DE202012104413U1 (fr)
ES (1) ES2555466T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108789243A (zh) * 2018-09-05 2018-11-13 上海优拜机械股份有限公司 轴向盘式棘轮打滑扳手
IL293383A (en) * 2022-05-26 2023-12-01 Bencialu Ltd Wrench

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013102518U1 (de) 2013-06-12 2013-06-24 Eduard Wille Gmbh & Co. Kg Ratschenwerkzeug
DE202018105815U1 (de) 2018-10-11 2018-11-05 STAHLWILLE Eduard Wille GmbH & Co. KG Adapter für ein Antriebswerkzeug

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE25302C (de) * G. GON-TIER in Cognac, Frankreich Schraubenschlüssel mit Schaltwerk für Rechts- und Linksdrehung
US1503888A (en) * 1923-02-26 1924-08-05 John E Erickson Ratchet wrench
DD255241A3 (de) 1985-12-31 1988-03-30 Cottbus Braunkohlenwerk Ratsche
US5388479A (en) * 1993-09-07 1995-02-14 Sroka; John Universal ratchet wrench
DE29916751U1 (de) * 1999-09-23 1999-12-30 Lou Lie Whu Ratschenschlüssel
US20040089106A1 (en) * 2002-11-12 2004-05-13 Wolfe Sandra C. Compact high-torque ratchet wrench

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE25302C (de) * G. GON-TIER in Cognac, Frankreich Schraubenschlüssel mit Schaltwerk für Rechts- und Linksdrehung
US1503888A (en) * 1923-02-26 1924-08-05 John E Erickson Ratchet wrench
DD255241A3 (de) 1985-12-31 1988-03-30 Cottbus Braunkohlenwerk Ratsche
US5388479A (en) * 1993-09-07 1995-02-14 Sroka; John Universal ratchet wrench
DE29916751U1 (de) * 1999-09-23 1999-12-30 Lou Lie Whu Ratschenschlüssel
US20040089106A1 (en) * 2002-11-12 2004-05-13 Wolfe Sandra C. Compact high-torque ratchet wrench

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108789243A (zh) * 2018-09-05 2018-11-13 上海优拜机械股份有限公司 轴向盘式棘轮打滑扳手
IL293383A (en) * 2022-05-26 2023-12-01 Bencialu Ltd Wrench

Also Published As

Publication number Publication date
ES2555466T3 (es) 2016-01-04
DE202012104413U1 (de) 2012-11-22
EP2732920B1 (fr) 2015-09-09

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