EP0227708B1 - Wagenheber - Google Patents

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Info

Publication number
EP0227708B1
EP0227708B1 EP86903220A EP86903220A EP0227708B1 EP 0227708 B1 EP0227708 B1 EP 0227708B1 EP 86903220 A EP86903220 A EP 86903220A EP 86903220 A EP86903220 A EP 86903220A EP 0227708 B1 EP0227708 B1 EP 0227708B1
Authority
EP
European Patent Office
Prior art keywords
crank
drive pinion
end portion
lifting jack
spindle
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.)
Expired
Application number
EP86903220A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0227708A1 (de
Inventor
Ferdinand Alten
Wolfgang Metzen
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.)
ThyssenKrupp Bilstein GmbH
Original Assignee
August Bilstein GmbH
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 August Bilstein GmbH filed Critical August Bilstein GmbH
Publication of EP0227708A1 publication Critical patent/EP0227708A1/de
Application granted granted Critical
Publication of EP0227708B1 publication Critical patent/EP0227708B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/16—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated actuated through bevel-wheel gearings

Definitions

  • the invention relates to a jack with a threaded spindle that supports a load carrier in a height-adjustable manner, the upper end of which is connected in a rotationally fixed manner to a spindle wheel which engages with a drive pinion which is essentially perpendicular to the latter, and with a hand crank end which penetrates a gearbox housing and is mounted in a pull-out manner therein. that engages in a rotationally fixed manner in a driving sleeve that is non-rotatable with the drive pinion.
  • Such a jack is known from DE-B-1 193 221.
  • the known driver sleeve 17 is in one piece with the drive pinion 14, and its rotationally positive assembly with the crank end 15 takes place via a serration with which the crank end - by a correspondingly force-fitting seat - must be secured against being pulled out.
  • This known construction obviously presupposes a complex part consisting of bevel gear and serrated driving sleeve, the production of which is expensive.
  • the form-fitting assembly of a drive pinion and a hand crank is carried out by means of a knurled press-fit connection provided on the latter.
  • a knurled press-fit connection provided on the latter.
  • annular collar is provided on the hand crank so that it cannot be pulled out of the gear housing again after it has been installed.
  • the knurling of the hand crank and its ring collar must be pressed through the bearing bush during assembly, since they have an outside diameter that exceeds their inside diameter. A destruction of the plastic bearing bush cannot be ruled out.
  • the pinion must be strong enough so that there is a sufficiently long or large connecting surface for the foot seat of the pinion on the knurled hand crank.
  • the invention has for its object to improve a jack of the type mentioned in such a way that drive sprockets designed as flat toothed disks can be fixed in a rotationally fixed manner on the crank end, without the risk that the axial connection between the crank end and the drive pinion can solve.
  • driver sleeve is a separate, but thus rotationally positive slot part from the drive pinion, which is assembled by means of bent slot edges with the crank end and axially positions the drive pinion which is displaceable on the crank end.
  • the mechanical connection between the hand crank end and the drive gear is no longer made directly, but via a separate part, which has the advantage that this separate part depends on the engagement and loading conditions of the drive pinion on the one hand and the hand crank end on the other can be better adapted.
  • the assembly of all parts can also be improved insofar as the parts to be connected to one another are initially arranged in their installed position with an open driving sleeve, and without any deformation on any parts. Only then are the edges of the open driving sleeve arranged at a distance from one another for the installation of the hand crank end in a simple manner, so that the gearbox of the jack is ready for use.
  • the hand crank end has a pinch nose which engages in an elongated hole in the driving sleeve. Both the pinch nose and the elongated hole are to be made in one step with the manufacture of the hand crank or the driving sleeve, so that the manufacturing outlay for the positive connection between the hand crank and the driving sleeve is very low.
  • the driving sleeve is arranged at a corresponding distance above the spindle end with approximately the depth of engagement between the hand crank end and the driving sleeve.
  • the gear housing and / or a crank-side bearing bush of the hand crank has at least one longitudinal groove profiled in accordance with the profile of the hand crank end. This longitudinal groove enables the hand crank or the pinch nose to be pushed through without overcoming frictional forces or without risk of destruction for the transmission housing and / or an existing bearing bush.
  • crank handle is supported at both ends in bearing bushings of the gearbox housing which are made of plastic and, if necessary, are provided with lubricant holes.
  • bearing bushes ensure that the gearbox runs smoothly. To do this, they prevent the drive pinion and the driving sleeve from contacting the transmission housing, which is difficult and difficult Risk of damage to the parts rubbing against each other.
  • the driver sleeve has a stepped end of approximately the same length as the thickness of the drive pinion, and this end is approximately U-shaped and engages in an approximately rectangular recess in the drive pinion. This results in a shape-retaining engagement connection that is sufficiently stable even for large turning forces with a simple design of the components involved.
  • the removal of the end of the driving sleeve, i.e. the shortening of the U-legs in the area of the engagement of the driving sleeve in the drive pinion allows the protruding edges of the driving sleeve to be deformed after the end of the crank handle has been inserted, without influencing the connection strength between the driving sleeve and drive pinion .
  • crank-side end of the driving bush is rounded in order to reduce the contact surface of the driving bush on the bearing bush and thus the friction between the two parts.
  • the spindle wheel and the drive pinion are flat;
  • the arrangement of two toothed disks within a gearbox enables the complete encapsulation of such simple gearboxes.
  • the connection according to the invention between the hand crank end and the drive pinion could, however, also be used in transmissions with bevel gears.
  • the drive pinion is positioned on the crank handle end adjacent to the gear housing and / or a bearing bush. Furthermore, the drive pinion is arranged on the free end of the hand crank end, which facilitates the assembly of the transmission.
  • the upper part of the jack 10 shown in FIG. 1 shows a supporting leg 11 and a threaded spindle 12 which is supported on the upper end of the supporting leg 11 with a spindle bearing 13.
  • the threaded spindle 12 is driven with a hand crank 14 via a gear 15 in a gear housing 16, which is firmly connected to the upper end of the supporting leg 10.
  • the gear housing 16 surrounds the gear 15 in a U-shape, and at the top there is also a cover cap 17 which is also U-shaped and is offset by 90 °, which covers the outer edges 18 of the gear housing 16 on the outside and is held there with latching connections 19.
  • the gearbox 15 of the jack essentially consists of a drive pinion 20 driven by the hand crank 14 and a spindle wheel 21 which is connected in a rotationally fixed manner to the upper spindle end of the threaded spindle 12.
  • the spindle wheel 21 is rotated with the drive pinion 20, so that the threaded spindle 12 rotates accordingly and a height-adjustable load arm on this threaded spindle 12 is adjusted according to the direction of rotation either upwards or downwards, so that the motor vehicle is either raised or is lowered.
  • the weight of the motor vehicle is removed from the load arm, not shown, via the threaded spindle 12, the spindle wheel 21 and the spindle bearing 13 on the support leg 11 and thus the floor, not shown.
  • the drive pinion 20 is mounted on the end 22 of the hand crank 14. It can be moved on the crank handle end 22 in both directions and must therefore be secured in position so that the engagement in the spindle wheel 21 is always guaranteed. This position securing of the drive pinion 20 is carried out by two bearing bushes 23, 24 and, above all, a driving sleeve 25.
  • the bearing bushes 23, 24 are seated in bores 26 of the gear housing 16 and each have a radial flange 27.
  • the two radial flanges 27 enclose the drive pinion 20 and the driving sleeve 25 between them and, on the other hand, rest on the inner wall of the gear housing 16, so that the required position securing the drive pinion 20 is guaranteed.
  • the bearing bushes 23, 24 are each made of plastic, so that a correspondingly low friction is ensured.
  • the bearing bush 23 has a lubricant bore 28 so that its interior can be filled with lubricant and the free end of the crank end 22 is lubricated accordingly where large forces have to be removed by the drive pinion 20. This lubrication also supports the drive pinion 20 on the radial flange 27 of the bearing bush 23 and prevents frictional wear here.
  • the bearing bush 24 is provided with a longitudinal groove 29, which can also be used to supply lubricant, but primarily serves for the passage of a pinch nose 30 of the crank end 22 when assembling the jack mechanism 15.
  • the pinch nose 30 engages in an elongated hole 31 of the driving sleeve 25, so that when driving with the hand crank 14, the driving sleeve 25 is also rotated.
  • the driver sleeve 25 in turn engages with a stepped end 32 in a recess 33 of the drive pinion 20.
  • the stepped end 32 of the driver sleeve 25 is U-shaped and the recess 33 is correspondingly rectangular.
  • the crank handle 14 is securely connected to the gear 15 because the pinch nose 30 engages in the elongated hole 31 in such a way that it cannot be pulled out of the longitudinal groove 29 of the bearing bush 24.
  • the edges 34 of the slotted driving sleeve 25 shown in FIG. 3 in a U-shape and bent over in FIG. 2 prevent the relative movement of the pinch nose 30 required for this in the bent state after assembly.
  • the rounding 35 of the cone-side ends of the driving sleeve 25 serve to further reduce wear within the transmission.
  • the driver sleeve 25 not only serves as a spacer and connecting part, but also for reinforcing the crank end 22.
  • the reinforcement is important because, when the load arm is clamped against the foot of the jack without rattling, the spindle 12 against the crank end 22 and driver sleeve 25 supports the existing axis.
  • the assembly of the gear 15 takes place such that after the installation of the spindle bearing 13 and the threaded spindle 12, the bearing bushes 23, 24 and the drive pinion 20 with the driver sleeve 25 assembled in the direction of the arrow according to FIG. 3 with the cover cap 17 removed into the interior of the gear housing 16 to be built in.
  • the driving sleeve 25 that its base 36 can be lowered towards the threaded spindle 12, that is to say it is arranged in the installed position at least by the base thickness above the spindle end.
  • the pinch nose 30 can be inserted through the longitudinal groove 29 until it comes to lie above the elongated hole 31.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • General Details Of Gearings (AREA)
  • Transmission Devices (AREA)
EP86903220A 1985-06-12 1986-05-21 Wagenheber Expired EP0227708B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8517069U 1985-06-12
DE8517069U DE8517069U1 (de) 1985-06-12 1985-06-12 Wagenheber

Publications (2)

Publication Number Publication Date
EP0227708A1 EP0227708A1 (de) 1987-07-08
EP0227708B1 true EP0227708B1 (de) 1989-01-04

Family

ID=6782033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86903220A Expired EP0227708B1 (de) 1985-06-12 1986-05-21 Wagenheber

Country Status (7)

Country Link
EP (1) EP0227708B1 (es)
JP (1) JP2536856B2 (es)
BR (1) BR8606729A (es)
DE (2) DE8517069U1 (es)
ES (1) ES294533Y (es)
WO (1) WO1986007344A1 (es)
ZA (1) ZA864335B (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4308481C1 (de) * 1993-03-17 1994-03-31 Bilstein August Gmbh Co Kg Getriebe für einen Wagenheber

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565401A (en) * 1945-09-25 1951-08-21 Smith S Jacking Systems Ltd Lifting jack
DE1193221B (de) * 1963-03-22 1965-05-20 Domkraft Ab Nike Schraubenspindel-Wagenheber
JPS4844170B1 (es) * 1969-07-30 1973-12-22
GB1212960A (en) * 1969-11-18 1970-11-18 Ford Motor Co Screw jack
DE2006906A1 (de) * 1970-02-14 1971-08-19 Fa August Bilstein, 5828 Ennepe tal Wagenheber
DE2046397C3 (de) * 1970-09-19 1982-05-13 August Bilstein GmbH & Co KG, 5828 Ennepetal Wagenheber
DE2054613C3 (de) * 1970-11-06 1974-01-31 E.A. Storz Kg, 7200 Tuttlingen Wagenheber
DE2403542C3 (de) * 1974-01-25 1978-06-08 Allendorfer Fabrik Fuer Stahlverarbeitung Ing. Herbert Panne Kg, 6331 Allendorf Wagenheber
FR2266030A1 (en) * 1974-03-26 1975-10-24 Sico Nouvelle Method of securing female element to shaft - involves deforming element into opposed recesses on shaft
US4006993A (en) * 1975-11-25 1977-02-08 Borg-Warner Corporation Shaft mounting arrangement
JPS5940711Y2 (ja) * 1980-09-03 1984-11-19 ホーチキ株式会社 非常警報装置

Also Published As

Publication number Publication date
ES294533Y (es) 1987-08-16
DE3661623D1 (en) 1989-02-09
BR8606729A (pt) 1987-08-11
WO1986007344A1 (en) 1986-12-18
ZA864335B (en) 1987-02-25
ES294533U (es) 1987-01-01
JPS63500028A (ja) 1988-01-07
JP2536856B2 (ja) 1996-09-25
EP0227708A1 (de) 1987-07-08
DE8517069U1 (de) 1985-08-14

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