EP1215014A2 - Vorspannanordnung für die Sperrklinge eines Schraubenschlüssels des umkehrbaren Ratschentyps - Google Patents

Vorspannanordnung für die Sperrklinge eines Schraubenschlüssels des umkehrbaren Ratschentyps Download PDF

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Publication number
EP1215014A2
EP1215014A2 EP01120977A EP01120977A EP1215014A2 EP 1215014 A2 EP1215014 A2 EP 1215014A2 EP 01120977 A EP01120977 A EP 01120977A EP 01120977 A EP01120977 A EP 01120977A EP 1215014 A2 EP1215014 A2 EP 1215014A2
Authority
EP
European Patent Office
Prior art keywords
pawl
hole
head
peg
drive member
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Withdrawn
Application number
EP01120977A
Other languages
English (en)
French (fr)
Other versions
EP1215014A3 (de
Inventor
Bobby Hu
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE10062853.2A external-priority patent/DE10062853C5/de
Application filed by Individual filed Critical Individual
Publication of EP1215014A2 publication Critical patent/EP1215014A2/de
Publication of EP1215014A3 publication Critical patent/EP1215014A3/de
Withdrawn legal-status Critical Current

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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
    • B25B13/462—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 a direction radial to the tool operating axis
    • B25B13/463—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 a direction radial to the tool operating axis a pawl engaging an externally toothed wheel

Definitions

  • the present invention relates to a biasing arrangement for a pawl of a reversible ratchet-type wrench to provide reliable ratcheting.
  • the present invention also relates to an improved head structure for a ratchet-type wrench to lower the manufacture cost.
  • U.S. Patent No. 2,957,377 issued to Hare on Oct. 25, 1960 discloses a reversible ratchet type wrench comprising a body 10 having a handle 11 and a head 12.
  • a cap 39 and an annular wall 44 are provided to upper side and lower side of the head 12, respectively. Yet, this increases the assembly time and the manufacture cost and adversely affects the appearance.
  • a shifting lever 35 is retained in place by a spring 33 that is located in a cylindrical opening 34. Nevertheless, formation of the cylindrical opening 34 that extends inclined upward is relatively difficult.
  • Figs. 10 and 11 illustrate another conventional ratchet type wrench comprising a handle 12' and a head 11'.
  • the head 11' is machined to form four consecutive compartments for receiving the drive member 20', the pawl 30' and the shifting lever 40', wherein three of the compartments can be formed by cutting, yet the remaining one must be machined by CNC.
  • the resultant head structure is relatively weak and thus has a poor torque-bearing capacity.
  • the movement of the pawl 30' for changing ratcheting direction is found unreliable, as it is achieved via transmission of the hook end 442' of a spring 44' attached to the shifting lever 40'.
  • a reversible ratchet-type wrench comprises:
  • An inner periphery defining the hole of the head includes a first annular groove.
  • the outer periphery of the drive member includes a second annular groove.
  • a C-clip is received in the first annular groove and the second annular groove, thereby rotatably retaining the drive member in the head.
  • the biasing means includes an elastic element and a peg.
  • the pawl further includes a second side with a recess.
  • the peg has a first end movably received in the recess of the pawl and a second end.
  • the elastic element biases the second end of the peg for exerting a force to the peg toward the pawl, thereby urging the ratchet teeth of the pawl to engage with the teeth of the gear wheel.
  • the actuating plate of the switch member includes a receptacle that faces the cavity.
  • the elastic element includes a first end received in the receptacle and a second end outside the receptacle and configured to be attached to the actuating plate.
  • the second end of the peg is received in the elastic element.
  • the first end of the elastic element is configured to bias the second end of the peg toward the recess of the pawl.
  • the actuating plate of the switch member includes a first receptacle that faces the cavity, the first receptacle having a first end wall.
  • the second end of the peg is received in the first receptacle and includes a second receptacle with a second end wall. Two ends of the elastic element are attached between the first end wall and the second end wall.
  • the drive member may be a gear wheel including an inner periphery for driving a fastener.
  • the drive member includes a drive column for releasably engaging with a socket.
  • the head includes an end wall with an opening, and the drive member includes a stub rotatably received in the opening.
  • a reversible ratchet-type wrench comprises:
  • a reversible ratchet-type wrench comprises:
  • a reversible ratchet-type wrench comprises:
  • a ratchet-type wrench 10 in accordance with the present invention generally includes a handle 12 and a head 11 having a hole 13.
  • An inner periphery 132 defining the hole 13 of the head 11 includes an annular groove 131 in a lower portion thereof.
  • a web 17 is defined between the head 11 and the handle 12.
  • a cavity 14 is defined in the web 17.
  • a compartment 15 that is substantially L-shape and includes an inner end communicated with the cavity 14 and an outer end communicated with outside, thereby leaving a bridge 16 on the web 17.
  • the outer end of the compartment 15 is preferably circular.
  • the bridge 16 increases the strength of the head 11 and the handle 12, thereby providing a higher torque-bearing capacity.
  • a drive member (in the form of a gear wheel 20 in this embodiment) is mounted in the head 11 and includes an inner periphery 24 for driving a fastener (not shown) and an outer periphery 25.
  • the outer periphery 25 includes a recessed upper end portion 22, a lower end portion 23, and a middle portion with a plurality of recessed teeth 21.
  • the lower end portion 23 includes an annular groove 231.
  • a C-clip 30 is received in the annular groove 231 of the lower end portion 23 and the annular groove 131 of the head 13, thereby rotatably retaining the gear wheel 20 in the head 11 of the wrench 10, best shown in Fig. 2.
  • a pawl 40 is mounted in cavity 14 in the web 17 and includes ratchet teeth 41 on a side thereof for engaging with teeth 21 of the gear wheel 20.
  • the other side of the pawl 40 further includes a recess 42 having two ends 421 and 422, which will be described later.
  • a switch member 50 is rotatably mounted to the second end of the compartment 15.
  • the switch member 50 includes a turn-piece 51 outside the compartment 15 for manual operation and an actuating plate 52 extended from the turn-piece 51 and having a receptacle 521 that faces the cavity 14.
  • a biasing means 60 is mounted in the receptacle 521 and includes an elastic element 62 and a peg 61.
  • the elastic element 62 includes a first end 621 configured to bias an end 612 of the peg 61.
  • a second end 622 of the elastic element 62 is configured to have a larger diameter so as to bear against and thus be attached to the actuating plate 52 in an area surrounding an opening section (not labeled) of the receptacle 521, as shown in Fig. 3.
  • the switch member 50 is mounted in the compartment 15 and the biasing means 60 is mounted into the receptacle 521 of the switch member 50 via the cavity 14 with the elastic element 62 surrounding a part of the peg 61.
  • the end 612 of the peg 61 bears against the first end 621 of the elastic element 62.
  • the pawl 40 is mounted into the cavity 14 with the other end 612 of the peg 61 extended into the recess 42 of the pawl 40.
  • the C-clip 30 is placed into the hole 132 and the gear wheel 20 is then mounted in the hole 132 with the C-clip 30 received in the annular grooves 131 and 231, thereby completing the assembly.
  • the assembly procedure is simple and can be accomplished quickly by a C-clip 30 without the aid of any screw or cover.
  • the ratchet-type wrench in Fig. 3 is in a status allowing counterclockwise ratcheting (free rotation in clockwise direction), in which the other end 611 of the peg 61 bears against an end 422 of the recess 42 of the pawl 40, and an end 44 of the pawl 40 bears against a wall portion defining the cavity 14.
  • Fig. 4 shows a transition position for the ratchet-type wrench that allows free rotation in both directions. As illustrated in Fig. 4, the elastic element 62 is stretched during rotational movement of the turn-piece. When the turn-piece 51 reaches its predetermined position shown in Fig.
  • the ratchet-type wrench is in a status allowing clockwise ratcheting and free rotation in the counterclockwise direction.
  • Fig. 7 illustrates a second embodiment in accordance with the present invention, wherein the gear wheel 20 is replaced by a drive member 70 having a drive column 73 with an engaging means 80 for releasably engaging with a socket (not shown).
  • the drive member 70 includes an outer periphery having a plurality of teeth 71 for engaging with the pawl teeth 41.
  • An annular groove 731 is defined in a lower portion of the outer periphery of the drive member 70 for engaging with the C-clip 30, which is identical to that disclosed above.
  • the drive member 70 includes a stub 72 on a top thereof, and the upper portion of the head 11 is modified to include an end wall 133 with an opening 134 for rotatably receiving the stub 72 of the drive member 70, thereby providing stable rotational movement for the drive member 70.
  • Fig. 8 illustrates a third embodiment in accordance with the present invention.
  • the biasing means (now designated by 90) in this embodiment includes a pin 92 that is having a receptacle 911 for receiving an end of the elastic element 92.
  • the elastic element 92 is attached between an end wall (not labeled) defining the receptacle 911 of the pin 92 and an end wall (not labeled) defining the receptacle 521 of the switch member 50.
  • Fig. 9 illustrates a fourth embodiment in accordance with the present invention. It is noted that the biasing means 90 in the fourth embodiment is identical to that of the third embodiment, and the drive member 70 in the fourth embodiment is identical to that of the second embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP01120977A 2000-12-16 2001-08-31 Vorspannanordnung für die Sperrklinge eines Schraubenschlüssels des umkehrbaren Ratschentyps Withdrawn EP1215014A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10062853.2A DE10062853C5 (de) 2000-02-03 2000-12-16 Umschaltbarer Ratschenschlüssel
DE10062853 2000-12-16

Publications (2)

Publication Number Publication Date
EP1215014A2 true EP1215014A2 (de) 2002-06-19
EP1215014A3 EP1215014A3 (de) 2003-10-29

Family

ID=7667488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01120977A Withdrawn EP1215014A3 (de) 2000-12-16 2001-08-31 Vorspannanordnung für die Sperrklinge eines Schraubenschlüssels des umkehrbaren Ratschentyps

Country Status (3)

Country Link
EP (1) EP1215014A3 (de)
JP (1) JP2002254329A (de)
CA (1) CA2356549C (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2633952A2 (de) 2012-03-02 2013-09-04 Apex Tool (HK) Limited, Taiwan Branch Ratschenschlüssel und Körper, der in einem Ratschenschlüssel verwendet wird
CN103286716A (zh) * 2012-03-02 2013-09-11 香港商艾沛克斯工具有限公司台湾分公司 棘轮扳手及使用于棘轮扳手之本体
CN110238784A (zh) * 2018-03-09 2019-09-17 黄证城 换向扳手结构

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4994465B2 (ja) * 2010-01-29 2012-08-08 直伸 山下 角度調整金具
JP5390643B2 (ja) * 2012-01-13 2014-01-15 直伸 山下 角度調整金具及び座いす

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW408653U (en) * 2000-02-03 2000-10-11 Hu Hou Fei Ratcheting tool

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW408653U (en) * 2000-02-03 2000-10-11 Hu Hou Fei Ratcheting tool

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2633952A2 (de) 2012-03-02 2013-09-04 Apex Tool (HK) Limited, Taiwan Branch Ratschenschlüssel und Körper, der in einem Ratschenschlüssel verwendet wird
CN103286716A (zh) * 2012-03-02 2013-09-11 香港商艾沛克斯工具有限公司台湾分公司 棘轮扳手及使用于棘轮扳手之本体
TWI426004B (zh) * 2012-03-02 2014-02-11 Apex Tool Hk Ltd Ratchet wrench and body used in ratchet wrench
US9067308B2 (en) 2012-03-02 2015-06-30 Apex Tool (Hk) Limited Taiwan Branch Ratchet wrench and body used in ratchet wrench
CN110238784A (zh) * 2018-03-09 2019-09-17 黄证城 换向扳手结构
CN110238784B (zh) * 2018-03-09 2022-02-18 黄证城 换向扳手结构

Also Published As

Publication number Publication date
CA2356549C (en) 2005-12-06
CA2356549A1 (en) 2002-06-16
EP1215014A3 (de) 2003-10-29
JP2002254329A (ja) 2002-09-10

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