EP0505282A1 - Federkompressor, insbesondere für bogenförmige Federn - Google Patents

Federkompressor, insbesondere für bogenförmige Federn Download PDF

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Publication number
EP0505282A1
EP0505282A1 EP92400756A EP92400756A EP0505282A1 EP 0505282 A1 EP0505282 A1 EP 0505282A1 EP 92400756 A EP92400756 A EP 92400756A EP 92400756 A EP92400756 A EP 92400756A EP 0505282 A1 EP0505282 A1 EP 0505282A1
Authority
EP
European Patent Office
Prior art keywords
spring
jaws
jaw
spring compressor
plane
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
EP92400756A
Other languages
English (en)
French (fr)
Other versions
EP0505282B1 (de
Inventor
Robert Lambert
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.)
Mecanique Energetique
Original Assignee
Mecanique Energetique
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 Mecanique Energetique filed Critical Mecanique Energetique
Publication of EP0505282A1 publication Critical patent/EP0505282A1/de
Application granted granted Critical
Publication of EP0505282B1 publication Critical patent/EP0505282B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/30—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs
    • B25B27/302—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs coil springs other than torsion coil springs
    • B25B27/304—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs coil springs other than torsion coil springs by compressing coil springs

Definitions

  • the present invention relates to a spring compressor used as a tool for mounting or dismounting the springs of shock absorbers of a motor vehicle.
  • the present invention intends to propose a spring compressor which allows the springs to be gripped. curved from the outside, and in a way as simple as for cylindrical springs, and which gives the possibility of gripping a cylindrical spring as close as possible to the cups.
  • the subject of the invention is a spring compressor, in particular a suspension compressor for a motor vehicle, comprising two jaws each having an active part in the shape of a horseshoe and an attachment part for its connection to a motor device, external to the active part, in which the axis of the motor device coupled to the jaws is outside the median plane of division of the jaws into two branches.
  • this arrangement makes it possible to place each jaw so that its partition plane is substantially coincident with the bending plane of the spring.
  • the jaws are thus located at the point where the turns are the most spaced from each other while the motor member of the compressor can be located outside this plane, that is to say, for example, in front of the plane of bending of the spring, where generally there is space available on the vehicle.
  • the advantage of this arrangement consists in being able to achieve maximum compression of the spring by bringing the external part of the turns, compression which can continue even if the internal part of the turns has become contiguous, leading to a straightening of the curvature of the spring.
  • the angular offset around the axis between the wire-cup contact points at the end of each spring will have been determined for each particular spring.
  • the plan for sharing a jaw coupled to the motor unit of the compressor is offset with respect to the partition plane of the other by substantially the same value as that of the offset of the contact points.
  • This offset between the jaw sharing planes (or cups) and the axis of the actuating cylinder can be obtained in several ways.
  • One of them consists in interposing between the jack and each cup an intermediate adaptation piece, so as to be able to use standard cups which have their attachment part in the sharing plane of the cup.
  • This embodiment is only of interest if there is sufficient space near the convex generator of the spring for the passage of this attachment part, which is not negligible in size.
  • Another way is to make special cups or jaws in which the attachment part is outside this partition plane, for example secured to one of the branches of the active part.
  • the bottom of the horseshoe is of minimal size and it is located where, between the external generator of a curved spring and the structure of the vehicle, there is only a small free space.
  • attachment part in a third embodiment, provision has been made for the attachment part to be movable relative to the active part. Fixing means are provided between them to fix them in one or more possible relative positions. This embodiment makes it possible to adjust the position of the jaws to that of the spring / shock absorber cup contact points.
  • Figure 1 very schematically shows an arm 1 of a vehicle wheel of which only the hub 2 is shown, provided with a damper 3 and a spring 4, coupled between the arm and a structural part 5 of the vehicle (a bell 6 for receiving the spring for example).
  • the spring 4 is bent in a plane substantially transverse to the vehicle and the space available on the convex side 4a of this spring is generally very small and does not allow a common spring compressor to be installed.
  • FIGs 2 and 3 illustrate the spring compressor according to the invention adapted to the compression of a curved spring.
  • This compressor comprises a drive member and two jaws 8 and 9 which are detachably coupled to the drive member (jack) 7.
  • Each jaw has an active part 10 which is generally in the form of a horseshoe or semi-annular track. This active part is intended to overlap about half a turn of the spring as shown in FIG. 3, and for this the bearing surface that it presents opposite this turn is of helical shape.
  • the pitch of this propeller is chosen as explained below.
  • Each jaw also includes an attachment part 11 to the motor member 7 which is integral with the active part but oriented relative to the latter so that the axis 7 a of this motor member 7 is outside the plane P for dividing the active part 10 into two branches 10 a and 10 b .
  • the means making it possible to obtain this offset are carried by the jaws themselves in the form of a connecting lug in one piece with the active and attachment parts.
  • An alternative embodiment has not been shown which would use a conventional jaw, that is to say a jaw in which the partition plane of the active part is also the plane of symmetry of the attachment part, and a part connecting the actuator 7 to this jaw, which can act as a mutual articulation lever for the parts. This bulky arrangement is not the best embodiment of the invention.
  • This offset makes it possible to place the jaws on the outside of the turns, that is to say where they are most apart, although at this location there is no room to house the cylinder.
  • the jack 7 is brought back for example on the front of the spring which is sufficiently cleared, and where it is accessible for its operation.
  • the advantage of placing the jaws in the convex part of the spring lies in the greater compressive power of the device. Indeed, if the part of the turns overlapped by the jaws is that for example visible in FIG. 2, the turns would be compressed substantially parallel to themselves. Also, as soon as they become contiguous inside the curvature, compression becomes impossible.
  • the compression of the convex part of the spring is not hampered by the contact between the turns at the level of the concave part.
  • the turns rotate around these internal contacts and the continuation of the compression generates a straightening of the spring.
  • a propeller pitch for the track of the active parts of each jaw, lower than that of the turns at the level of the convex part of the spring. It is understood that thus the jaw-spring contact is made at the start of compression, in the middle part of the lower jaw and on the tips of the branches of the upper jaw.
  • the spring crushing and straightening, each turn in engagement tends to rest on the entire track of each jaw and at the end of compression, the spring is perfectly held in the jaws.
  • advantages of the invention lie in the fact that the same jaws can be used for dismantling the left and right springs of a motor vehicle (the figures relate only to the left spring for example).
  • the part 11 comprises a mortise M in which is housed a tenon T of the part 10.
  • the mortise M and the tenon T are of annular shape and means 12 for mutual fixing of the two parts 10 and 11 (for example pins, bolts, etc.) are provided to secure the two parts in one of several configurations. determined possible.
  • This embodiment may include variants, for example by articulation of an arm carrying the attachment part on the active part.
  • the invention also covers a tool in which the two jaws are offset symmetrically with respect to the fixing part (which can be obtained in an adjustable manner with the variant of FIG. 4).
  • the invention also includes another embodiment not shown in which the active part of the jaw is articulated to the attachment part around an axis substantially orthogonal to the axis 7 a of the jack.
  • This articulated jaw makes it possible to have practically flat cups whose inclination around this axis of articulation constitutes a means of adaptation of the active part to the propeller of the turn of the engaged spring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
EP19920400756 1991-03-21 1992-03-20 Federkompressor, insbesondere für bogenförmige Federn Expired - Lifetime EP0505282B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9103443 1991-03-21
FR9103443A FR2674167B1 (fr) 1991-03-21 1991-03-21 Compresseur de ressorts, notamment pour ressorts cintres.

Publications (2)

Publication Number Publication Date
EP0505282A1 true EP0505282A1 (de) 1992-09-23
EP0505282B1 EP0505282B1 (de) 1994-09-14

Family

ID=9410981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920400756 Expired - Lifetime EP0505282B1 (de) 1991-03-21 1992-03-20 Federkompressor, insbesondere für bogenförmige Federn

Country Status (3)

Country Link
EP (1) EP0505282B1 (de)
DE (1) DE69200401T2 (de)
FR (1) FR2674167B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7562888B2 (en) * 2003-01-08 2009-07-21 Honda Motor Co., Ltd. Vehicular suspension system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20019720U1 (de) 2000-11-21 2001-01-25 Klann Tools Ltd., Didcot, Oxfordshire Federspanner zum Spannen labiler oder gebogen vorgespannter Schraubenfedern
DE20119267U1 (de) 2001-11-27 2002-02-21 Klann Tools Ltd., Oxfordshire Exzenter-Druckplatten für Federspanner

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR409792A (fr) * 1908-12-01 1910-04-30 Jacinte Cerqueda Dispositifs de leviers lève-soupape
US1517899A (en) * 1922-10-12 1924-12-02 Mathew J Burkel Valve-spring-lifting device
FR590857A (fr) * 1924-02-21 1925-06-24 Dispositif de lève-soupape
FR2421034A1 (fr) * 1978-03-28 1979-10-26 Klann Horst Dispositif de montage et de demontage de ressorts de forte puissance
DE9108138U1 (de) * 1990-07-02 1991-08-22 Mecanique Energetique, Egreville Gerät zum Zusammenspannen bzw. Auseinanderspannen von Federn

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR409792A (fr) * 1908-12-01 1910-04-30 Jacinte Cerqueda Dispositifs de leviers lève-soupape
US1517899A (en) * 1922-10-12 1924-12-02 Mathew J Burkel Valve-spring-lifting device
FR590857A (fr) * 1924-02-21 1925-06-24 Dispositif de lève-soupape
FR2421034A1 (fr) * 1978-03-28 1979-10-26 Klann Horst Dispositif de montage et de demontage de ressorts de forte puissance
DE9108138U1 (de) * 1990-07-02 1991-08-22 Mecanique Energetique, Egreville Gerät zum Zusammenspannen bzw. Auseinanderspannen von Federn

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7562888B2 (en) * 2003-01-08 2009-07-21 Honda Motor Co., Ltd. Vehicular suspension system

Also Published As

Publication number Publication date
DE69200401D1 (de) 1994-10-20
EP0505282B1 (de) 1994-09-14
DE69200401T2 (de) 1995-05-04
FR2674167A1 (fr) 1992-09-25
FR2674167B1 (fr) 1995-07-28

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