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WO1999061207A1 - Wheel nut wrench with a thin-walled moment arm - Google Patents

Wheel nut wrench with a thin-walled moment arm Download PDF

Info

Publication number
WO1999061207A1
WO1999061207A1 PCT/SE1999/000808 SE9900808W WO9961207A1 WO 1999061207 A1 WO1999061207 A1 WO 1999061207A1 SE 9900808 W SE9900808 W SE 9900808W WO 9961207 A1 WO9961207 A1 WO 9961207A1
Authority
WO
WIPO (PCT)
Prior art keywords
torque arm
passage
spanner
tensile strength
nut socket
Prior art date
Application number
PCT/SE1999/000808
Other languages
French (fr)
Inventor
Leif Carlsson
Original Assignee
Avesta Sheffield Ab
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 Avesta Sheffield Ab filed Critical Avesta Sheffield Ab
Publication of WO1999061207A1 publication Critical patent/WO1999061207A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00Spanners; Wrenches
    • B25B13/02Spanners; Wrenches with rigid jaws
    • B25B13/06Spanners; Wrenches with rigid jaws of socket type

Definitions

  • the present invention relates to a wheel nut spanner comprising a nut socket portion and a torque arm.
  • the wheel nut spanners which today form part of the tool set delivered together with new cars are generally manufactured in a solid steel material. This means that the weight of such a tool is relatively high.
  • the object of the present invention is to provide a wheel nut spanner, the weight of which is considerably reduced without this involving a negative influence on the performance of the tool.
  • a wheel nut spanner which, in an excellent manner, fulfils its purpose at the same time making the manufacturing process more rational and cost-saving. Due to the fact that the torque arm, which forms a part of the tool and is secured to the socket portion thereof, is manufactured from a thin wall steel tube of ultrahigh-tensile strength steel, it has become possible to reduce the weight of the tool according to the present invention to less than half the weight of prior art wheel nut spanners which in most cases exceed 400 g. More specifically, the weight can be reduced down to 200 g. Further, since the tube of ultrahigh-tensile strength steel can be connected to the nut socket portion in a special way, there will neither occur any impairment of the strength of the steel at the spot where the tube is secured to the nut socket portion.
  • Fig. 1 is a part-sectional lateral view of a wheel nut spanner according to the present invention
  • Fig. 2 is a top view of a the tool shown in Fig. 1;
  • Fig. 3 is a section through the torque arm of the wheel nut spanner taken along the line A-A.
  • the wheel nut spanner 1 does, in accordance with the preferred embodiment, comprise a nut socket portion 3 and a torque arm 2 connected thereto.
  • the torque arm 2 is constituted by a thin wall tube 9 of ultrahigh-tensile strength steel.
  • the ultrahigh-tensile strength steel from which the torque arm 2 has been manufactured has a tensile strength limit which is greater than 800 N/mm 2 .
  • a steel having a tensile strength limit in the range of 1000-1350 N/mm 2 is received in the passage 7 at the top end 5 of the nut socket 3.
  • the passage extends somewhat obliquely through the nut socket portion meaning that the angle between the centre axis 8 of the passage 7 and the centre axis 15 of the sleeve 6 is greater than 90°, according to the embodiment shown 103°.
  • Torque arm 2 extends obliquely outwards or upwards relatively the sleeve 6 as seen in the use position of the tool 1.
  • the torque arm 2 is constituted by an oval tube 9 and the passage 7 receiving the torque arm 2 does also have an oval cross-section.
  • Such a design requires that the connection between the nut socket portion 3 and the torque arm 2 is of such a nature that the strength of the steel in the torque arm is not impaired at the place of connection. For that reason, torque arm 2 is at the free end 11 of its mounting section 10 welded to the sleeve 6 of the nut socket portion by means of a weld joint 13.
  • the section 14 of the torque arm 2 extending through the passage 7 in sleeve 6 does not at the opposite side 12 exhibit any weld joint. Such a joint in that location would result in the torque arm becoming weakened.
  • the mounting end 10 of torque arm 2 can, by way of example, be secured in the passage 7 in sleeve 6 using a tight fit.
  • the bond between arm 2 and passage 7 can be achieved in the way that the mounting end 10 of arm 2 is exposed to an expansion after having been inserted into the passage 7 in sleeve 6.
  • a wheel nut spanner 1 according to the invention can be provided with a nut socket portion having a hexagonal or other shape matching the wheel nuts of a motor car wheel, and a diametrically extending passage 7 for torque arm 2.
  • torque arm 2 has an oval cross-section but it should be appreciated that it can have any other suitable cross-section, for example square, hexagonal, octagonal or circular, should this be considered suitable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

The invention relates to a wheel nut spanner (1) comprising a nut socket portion (3) and a torque arm (2). The torque arm (2) is constituted by a thin wall tube (9) of ultrahigh-tensile strength steel.

Description

Wheel nut wrench with a thin-walled moment arm
The present invention relates to a wheel nut spanner comprising a nut socket portion and a torque arm.
The wheel nut spanners which today form part of the tool set delivered together with new cars are generally manufactured in a solid steel material. This means that the weight of such a tool is relatively high.
The object of the present invention is to provide a wheel nut spanner, the weight of which is considerably reduced without this involving a negative influence on the performance of the tool. The features characterizing the invention are set out in the subsequent claims.
Thanks to the present invention there is now provided a wheel nut spanner which, in an excellent manner, fulfils its purpose at the same time making the manufacturing process more rational and cost-saving. Due to the fact that the torque arm, which forms a part of the tool and is secured to the socket portion thereof, is manufactured from a thin wall steel tube of ultrahigh-tensile strength steel, it has become possible to reduce the weight of the tool according to the present invention to less than half the weight of prior art wheel nut spanners which in most cases exceed 400 g. More specifically, the weight can be reduced down to 200 g. Further, since the tube of ultrahigh-tensile strength steel can be connected to the nut socket portion in a special way, there will neither occur any impairment of the strength of the steel at the spot where the tube is secured to the nut socket portion.
A preferred embodiment of the invention is described below, reference being made to the drawing in which
Fig. 1 is a part-sectional lateral view of a wheel nut spanner according to the present invention; Fig. 2 is a top view of a the tool shown in Fig. 1; and
Fig. 3 is a section through the torque arm of the wheel nut spanner taken along the line A-A.
As appears from the drawing, the wheel nut spanner 1 does, in accordance with the preferred embodiment, comprise a nut socket portion 3 and a torque arm 2 connected thereto. The torque arm 2 is constituted by a thin wall tube 9 of ultrahigh-tensile strength steel. The nut socket portion 3, which is manufactured in steel of a quality conventionally used for that purpose, does at its free end exhibit a nut-receiving portion 4 and a sleeve portion 6 which is integral therewith and at its top end 5 is provided with a passage 7 receiving the torque arm 2.
The ultrahigh-tensile strength steel from which the torque arm 2 has been manufactured has a tensile strength limit which is greater than 800 N/mm2. Preferably, use is made of a steel having a tensile strength limit in the range of 1000-1350 N/mm2. The torque arm 2 is received in the passage 7 at the top end 5 of the nut socket 3. The passage extends somewhat obliquely through the nut socket portion meaning that the angle between the centre axis 8 of the passage 7 and the centre axis 15 of the sleeve 6 is greater than 90°, according to the embodiment shown 103°. Torque arm 2 extends obliquely outwards or upwards relatively the sleeve 6 as seen in the use position of the tool 1.
In the example shown the torque arm 2 is constituted by an oval tube 9 and the passage 7 receiving the torque arm 2 does also have an oval cross-section. Such a design requires that the connection between the nut socket portion 3 and the torque arm 2 is of such a nature that the strength of the steel in the torque arm is not impaired at the place of connection. For that reason, torque arm 2 is at the free end 11 of its mounting section 10 welded to the sleeve 6 of the nut socket portion by means of a weld joint 13. The section 14 of the torque arm 2 extending through the passage 7 in sleeve 6 does not at the opposite side 12 exhibit any weld joint. Such a joint in that location would result in the torque arm becoming weakened.
The mounting end 10 of torque arm 2 can, by way of example, be secured in the passage 7 in sleeve 6 using a tight fit. Alternatively, the bond between arm 2 and passage 7 can be achieved in the way that the mounting end 10 of arm 2 is exposed to an expansion after having been inserted into the passage 7 in sleeve 6.
A wheel nut spanner 1 according to the invention can be provided with a nut socket portion having a hexagonal or other shape matching the wheel nuts of a motor car wheel, and a diametrically extending passage 7 for torque arm 2. In the example shown torque arm 2 has an oval cross-section but it should be appreciated that it can have any other suitable cross-section, for example square, hexagonal, octagonal or circular, should this be considered suitable.

Claims

1. A wheel nut spanner (1) comprising a wheel nut socket portion (3) and a torque arm (2) , characterized in that the torque arm (2) is constituted by a thin wall tube (9) of ultrahigh-tensile strength steel.
2. A spanner according to Claim 1, characterized in that the tube (9) consisting of ultrahigh-tensile strength steel has a tensile strength limit exceeding 700 N/mm2.
3. A spanner according to Claim 2, characterized in that the tensile strength limit preferably amounts to about 1200 N/mm2.
4. A spanner according to Claim 1, characterized in that the torque arm (2) is held in position in the upper portion of the nut socket (3) , preferably by welding in a corresponding passage (7) , the centre axis (8) of which does with that of the nut socket portion (3) form an angle greater than 90°, said torque arm (2) extending obliquely outwards or upwards relatively the nut socket portion (3) in the use position of the spanner (1) .
5. A spanner according to Claim 4, characterized in that the torque arm (2) is constituted by an oval tube (9) matching an oval passage (7) in the sleeve portion (6) of said nut socket (3), the fee end (11) of the mounting section (10) of said tube (9) being welded thereto.
6. A spanner according to Claim 5, characterized in that the mounting end (10) of the torque arm (2) is with a tight fit held in position in the passage (7) of sleeve portion (6) .
7. A spanner according to Claim 5, characterized in that the mounting section (10) of the torque arm (2) has been exposed to an expansion after having been inserted in the passage (7) in sleeve (6) .
PCT/SE1999/000808 1998-05-11 1999-05-11 Wheel nut wrench with a thin-walled moment arm WO1999061207A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9801655-3 1998-05-11
SE9801655A SE522728C2 (en) 1998-05-11 1998-05-11 Device at a wheel nut wrench

Publications (1)

Publication Number Publication Date
WO1999061207A1 true WO1999061207A1 (en) 1999-12-02

Family

ID=20411276

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1999/000808 WO1999061207A1 (en) 1998-05-11 1999-05-11 Wheel nut wrench with a thin-walled moment arm

Country Status (2)

Country Link
SE (1) SE522728C2 (en)
WO (1) WO1999061207A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6295897B1 (en) 1999-12-03 2001-10-02 Tum Yeto, Inc. Multi-socket skateboard tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE582192C (en) * 1933-08-10 Krumm & Co M B H Cross socket wrench
US3161093A (en) * 1962-08-03 1964-12-15 Gilbert L Hoag Socket wrench with captive handle
US3872527A (en) * 1973-01-10 1975-03-25 Robert L Tregoning Lug nut wrench tool
FR2517239A1 (en) * 1981-11-27 1983-06-03 Laval Maurice Spanner with movable tommy bar - has stem with socket and inclined sheath for sliding bar
FR2704808A1 (en) * 1993-05-07 1994-11-10 Rousseau Jean Jacques Felix Multi-function spanner (wrench) for fitting and removing the wheels of a motor vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE582192C (en) * 1933-08-10 Krumm & Co M B H Cross socket wrench
US3161093A (en) * 1962-08-03 1964-12-15 Gilbert L Hoag Socket wrench with captive handle
US3872527A (en) * 1973-01-10 1975-03-25 Robert L Tregoning Lug nut wrench tool
FR2517239A1 (en) * 1981-11-27 1983-06-03 Laval Maurice Spanner with movable tommy bar - has stem with socket and inclined sheath for sliding bar
FR2704808A1 (en) * 1993-05-07 1994-11-10 Rousseau Jean Jacques Felix Multi-function spanner (wrench) for fitting and removing the wheels of a motor vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6295897B1 (en) 1999-12-03 2001-10-02 Tum Yeto, Inc. Multi-socket skateboard tool
WO2001039929A3 (en) * 1999-12-03 2002-05-02 Tum Yeto Inc Multi-socket skateboard tool

Also Published As

Publication number Publication date
SE9801655D0 (en) 1998-05-11
SE522728C2 (en) 2004-03-02
SE9801655L (en) 1999-11-12

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