EP1214176A1 - A device for the dismantling and reassembly of vehicle-suspension spring/shock-absorber units - Google Patents
A device for the dismantling and reassembly of vehicle-suspension spring/shock-absorber unitsInfo
- Publication number
- EP1214176A1 EP1214176A1 EP00956491A EP00956491A EP1214176A1 EP 1214176 A1 EP1214176 A1 EP 1214176A1 EP 00956491 A EP00956491 A EP 00956491A EP 00956491 A EP00956491 A EP 00956491A EP 1214176 A1 EP1214176 A1 EP 1214176A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- frame
- arm
- coupling member
- arms
- 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
Links
- 239000006096 absorbing agent Substances 0.000 title claims description 23
- 239000000725 suspension Substances 0.000 title claims description 5
- 230000001360 synchronised effect Effects 0.000 claims abstract description 6
- 230000008878 coupling Effects 0.000 claims description 25
- 238000010168 coupling process Methods 0.000 claims description 25
- 238000005859 coupling reaction Methods 0.000 claims description 25
- 230000000452 restraining effect Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
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 device for the dismantling and reassembly of vehicle-suspension spring/shock-absorber units, in particular, those commonly known as McPherson struts .
- the object of the present invention is to provide a device which permits the dismantling and reassembly of spring/shock-absorber units of various sizes and geometrical arrangements, in particular even those having springs which are conical or have their axes offset relative to the axis of the shock-absorber rod, ensuring a high degree of safety for the operator.
- the engagement means of the device of the invention act solely on the spring of the spring/shock-absorber unit, they enable the device, in particular, to be fully adaptable to units with springs which have various diameters and/or a conical structure and/or which are offset relative to the shock-absorber rod.
- Figure 1 is a perspective view of a device of the invention
- Figure 2 is an exploded view of the main components of the device of Figure 1,
- Figure 3 is a perspective view showing a detail of the device of Figure 1, on an enlarged scale, and
- Figure 4 is a view of the device of the previous drawings operating on a spring/shock-absorber unit.
- a device for the dismantling and reassembly of a vehicle- suspension spring/shock-absorber unit A (visible in Figure 4) comprises ( Figures 1 and 2): a fixed support frame 10, an actuator 12 mounted on the lower portion of the fixed frame, and a movable frame 14 which can move vertically along the fixed frame 10 as a result of the operation of the actuator 12.
- the fixed frame 10 includes two vertical profiled elements 18 fixed to a base 20 and connected at their upper ends by a cross-member 22 on the top of which a compartment 24 for holding objects is fixed.
- First engagement means for engaging the upper end of the spring B of the unit A are associated with the fixed frame 10 and comprise a first arm and a second arm 26a, 26b each having one end 28 articulated to the cross-member 22 of the frame 10 and an opposite, distal end 30 supporting a coupling member.
- Each of the coupling members comprises a rod 32 which can be housed in a seat 34 of square cross-section in the distal end 30 of the respective arm 26a, 26b.
- a pin 36 mounted rotatably in the rod 32 carries, at its distal end, a bracket 38 which has tabs 40 for restraining the spring B and from which project two hooks 42 for the coupling member of the arm 26a, and only one hook 42 for the coupling member of the arm 26b, respectively.
- Each coupling member also has means for adjusting the height at which it is positioned relative to the fixed frame 10.
- These adjustment means comprise a plurality of holes 44 which are offset vertically on the distal ends 30 of the arms 26a, 26b and communicate with the seat 34, and a key 46 which can be inserted in one of the holes 44 , according to choice .
- Respective rods 48a, 48b project from the ends 28 of the first and second arms 26a 26b which are articulated to the frame 10 ( Figure 3) , the distal ends 50 of the rods 48a, 48b being coupled in a manner such that a rotary movement imparted to one of the arms 26a, 26b about the end 28 brings about a rotary movement of equal amplitude of the other arm 26b, 26a about its end 28.
- the two arms 26a, 26b are coupled by virtue of the fact that an eye 52 is fixed to the end 50 of one of the rods 48a and the end 50 of the other rod 48b is restrained in the eye.
- Second engagement means for engaging the lower end of the spring B are associated with the movable frame 14 ( Figures 1 and 2) and comprise a third arm 26c and a fourth arm 26d each having one end 28 articulated to the movable frame 14 and an opposite, distal end 30 supporting a coupling member.
- the coupling member associated with the fourth arm 26d comprises a rod 32 which can be housed in a square-sectioned seat 34 formed in the distal end 30 of the arm 26d.
- a pin 36 mounted rotatably in the rod 32 carries, at its distal end, a bracket 38 which has tabs 40 for restraining the spring B and from which a hook 42 projects.
- the coupling member associated with the fourth arm 26d has means for adjusting the height at which it is positioned relative to the frame 14.
- These adjustment means comprise a threaded seat formed in the member and an adjustment screw 54 which can be screwed into the seat .
- adjustment means of this type could be used for adjusting the height of the coupling members associated with the arms 26a, 26b and, conversely, the adjustment means described above for the adjustment of the height of the latter coupling members could be used for the adjustment of the height of the coupling member associated with the arm 26d.
- the coupling member associated with the third arm 26c comprises a threaded rod 56 which can be screwed into a threaded seat 58 in the distal end 30 of the arm 26c and carries, at its distal end, a bracket 38 which has tabs 40 for restraining the spring B and from which two hooks 42 project.
- respective rods project from the ends 28 of the third and fourth arms 26c, 26d which are articulated to the frame 14, the distal ends of the rods being coupled in a manner such that a rotary movement imparted to one of the arms brings about a rotary movement of equal amplitude of the other arm.
- the movable frame 14 comprises ( Figures 1 and 2) two vertical bars 60 connected at their upper and lower ends by respective cross-members 62 and has spaced-apart rollers 64 for enabling it to slide linearly along the fixed frame 10.
- a plate 66 for supporting the lower end of the spring/shock- absorber unit A is mounted so as to be slidable vertically on the frame 14.
- the plate 66 is mounted, with the interposition of resilient means such as a helical spring 68, on a flange 70 of a support member to an opposed flange 72 of which is fixed a sleeve 74 which can slide about a rod 76 fixed to the movable frame 14.
- the plate 66 can be fixed at a predetermined level relative to the movable frame 14 in a known manner, not shown in the drawings, for example, by means of a screw which extends through a radial hole in the sleeve 74 and is intended to abut the rod 76.
- the actuator 12 is a pneumatic unit of the cylinder-piston type, the piston of which can act on a respective abutment surface of the upper cross-member 62 of the movable frame 14.
- the actuator 12 can be operated by means of a pedal 78 provided with protection 80 for the operator's foot.
- the actuator 12 advantageously incorporates a safety valve which can close automatically in the event of failure of the air supply, whilst permitting decompression of the spring B.
- the device also has a protection member 82 for the region which is intended to house the spring/shock-absorber unit A.
- the member 82 is in the form of a generally C-shaped cage articulated to the fixed frame 10 at distal ends 84 of arms
- the spring/shock-absorber unit A to be dismantled is placed on top of the movable frame 14 , the lower end of the spring B being engaged first of all ( Figure 4) .
- This engagement takes place by pivoting of the arms 26c, 26d in a plane transverse the axis of the spring B and in a synchronous and symmetrical manner by virtue of the engagement achieved by the rods 48a, 48b (see arrow 88 in Figure 1) , thus bringing the respective coupling members into contact with portions of the spring B disposed on opposite sides of a vertical plane extending through its longitudinal axis, in particular, substantially diametrally opposed portions.
- the movable frame 14 is then urged upwards by the actuator 12 (see arrow 94 in Figure 1) , operated by the pedal 78, until the upper end of the spring B is engaged by the fixed frame 10.
- This engagement takes place by pivoting of the arms 26a, 26b in a plane transverse the axis of the spring B and in a synchronous and symmetrical manner by virtue of the engagement achieved by the rods 48a, 48b (see arrows 96 in Figure 1) , thus bringing the respective coupling members into contact with portions of the spring B disposed on opposite sides of a vertical plane extending through its longitudinal axis, in particular, substantially diametrally opposed portions.
- brackets 38 carrying the hooks 42 can be rotated about a vertical axis (see arrows 98 in Figure 1) in order to achieve a more secure engagement.
- the height at which the engagement members associated with the arms 26a, 26b are positioned may undergo a specific adjustment (see arrows 100 in Figure 1) by the insertion of the respective keys 46 in suitable holes 44, since the portions of the spring B engaged thereby will typically be at different heights .
- the secure and firm clamping of the spring B is also favoured by the restraining tabs 40 and by the fact that the heights at which the coupling members associated with the arms 26a, 26b and 26d are positioned can be adjusted, whereas that of the member associated with the arm 26c remains fixed, acting as a reference.
- the actuator 12 can be operated again so as to bring about a further upward movement of the movable frame 14 and a consequent gradual compression of the spring B until the resilient load transmitted by the spring to the remaining components of the unit A is cancelled out.
- the operator can thus remove the nut D clamping the plate E without any risk and, by virtue of the particular structure of the device, the nut is easily accessible, even with professional unscrewing tools .
- the shock-absorber C When the nut D has been unscrewed, the shock-absorber C is released from the other components of the unit A. It is prevented from falling by the fact that its base bears on the plate 66 which has previously been positioned adjacent the top of the movable frame 14 , the upward movements of which it has followed. If the plate 66 is now moved downwards (see arrow 102 in Figure 1) along the rod 76 fixed to the frame 14 which, at this stage, remains stationary, the shock-absorber C is freely accessible.
- the shock-absorber C can easily and quickly be removed and replaced by a spare one .
- the operator can then reassemble the unit A by repeating the steps just described in reverse.
- the plate 66 performs the task of supporting the new shock-absorber in the correct position, leaving the operator's hands completely free to position the various accessories beneath the nut D.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
- Springs (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1999TO000752A IT1310693B1 (en) | 1999-09-08 | 1999-09-08 | DISASSEMBLY AND REASSEMBLY OF VEHICLE SUSPENSION SPRING-SHOCK ASSEMBLIES |
ITTO990752 | 1999-09-08 | ||
PCT/EP2000/008378 WO2001017727A1 (en) | 1999-09-08 | 2000-08-28 | A device for the dismantling and reassembly of vehicle-suspension spring/shock-absorber units |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1214176A1 true EP1214176A1 (en) | 2002-06-19 |
EP1214176B1 EP1214176B1 (en) | 2004-03-24 |
Family
ID=11418049
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00956491A Expired - Lifetime EP1214176B1 (en) | 1999-09-08 | 2000-08-28 | A device for the dismantling and reassembly of vehicle-suspension spring/shock-absorber units |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1214176B1 (en) |
AT (1) | ATE262393T1 (en) |
AU (1) | AU6841200A (en) |
DE (1) | DE60009317D1 (en) |
ES (1) | ES2215062T3 (en) |
IT (1) | IT1310693B1 (en) |
WO (1) | WO2001017727A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006003284B3 (en) * | 2006-01-23 | 2007-07-05 | Klann-Spezial-Werkzeugbau-Gmbh | Tensioning device for coil spring of spring strut has one support element with two holding elements are adjustable relative to each other by setting member |
DE202012005626U1 (en) | 2012-06-06 | 2012-06-29 | Klann-Spezial-Werkzeugbau-Gmbh | Pressure plate for spring tensioner |
DE102012110251B3 (en) * | 2012-10-26 | 2014-03-27 | Hazet-Werk Hermann Zerver Gmbh & Co. Kg | Stationary spring tensioning device with universal clamping plate |
ITRM20120595A1 (en) * | 2012-11-27 | 2014-05-28 | Antonello Mazzei | PERFECT PRESS FOR REVERSIBLE DISASSEMBLY OF SHOCK ABSORBERS FOR MOTOR VEHICLES |
GB2516413B (en) * | 2013-05-17 | 2019-01-16 | Jack Sealey Ltd | Guard |
CN109366155B (en) * | 2018-12-25 | 2023-06-20 | 成都岁生科技有限责任公司 | Tool for disassembling springs of railway vehicle bogie and spring disassembling method |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58140021U (en) * | 1982-03-17 | 1983-09-20 | トヨタ自動車株式会社 | Coil spring assembly device |
US4502664A (en) * | 1983-03-03 | 1985-03-05 | Snap-On Tools Corporation | MacPherson spring compressor |
US4785519A (en) * | 1987-04-02 | 1988-11-22 | Branick Industries, Inc. | Strut spring compressor |
US5507470A (en) * | 1994-12-21 | 1996-04-16 | Amstutz; Peter | Spring compressor |
-
1999
- 1999-09-08 IT IT1999TO000752A patent/IT1310693B1/en active
-
2000
- 2000-08-28 EP EP00956491A patent/EP1214176B1/en not_active Expired - Lifetime
- 2000-08-28 DE DE60009317T patent/DE60009317D1/en not_active Expired - Lifetime
- 2000-08-28 ES ES00956491T patent/ES2215062T3/en not_active Expired - Lifetime
- 2000-08-28 WO PCT/EP2000/008378 patent/WO2001017727A1/en active IP Right Grant
- 2000-08-28 AU AU68412/00A patent/AU6841200A/en not_active Abandoned
- 2000-08-28 AT AT00956491T patent/ATE262393T1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0117727A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU6841200A (en) | 2001-04-10 |
DE60009317D1 (en) | 2004-04-29 |
ES2215062T3 (en) | 2004-10-01 |
ITTO990752A0 (en) | 1999-09-08 |
ITTO990752A1 (en) | 2001-03-08 |
EP1214176B1 (en) | 2004-03-24 |
ATE262393T1 (en) | 2004-04-15 |
WO2001017727A1 (en) | 2001-03-15 |
IT1310693B1 (en) | 2002-02-22 |
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