DE1273948B - Electro-hydraulic lifting device - Google Patents

Electro-hydraulic lifting device

Info

Publication number
DE1273948B
DE1273948B DE1963K0050573 DEK0050573A DE1273948B DE 1273948 B DE1273948 B DE 1273948B DE 1963K0050573 DE1963K0050573 DE 1963K0050573 DE K0050573 A DEK0050573 A DE K0050573A DE 1273948 B DE1273948 B DE 1273948B
Authority
DE
Germany
Prior art keywords
lifting device
piston rod
electro
hydraulic lifting
guide bush
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.)
Pending
Application number
DE1963K0050573
Other languages
German (de)
Inventor
Erhard Mueller
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.)
KLOSE FA KG
Original Assignee
KLOSE FA KG
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 KLOSE FA KG filed Critical KLOSE FA KG
Priority to DE1963K0050573 priority Critical patent/DE1273948B/en
Publication of DE1273948B publication Critical patent/DE1273948B/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/18—Combined units comprising both motor and pump

Description

Elektrohydraulisches Hubgerät Zusatz zur Anmeldung: K 49452 XII/47 h -Auslegeschrift 1258 692 Die Erfindung bezieht sich auf ein elektrohydraulisches Hubgerät mit einem Hubzylinder von geringem Durchmesser, der innerhalb der dem Elektromotor und der Pumpe gemeinsamen Hohlwelle angeordnet ist.Electro-hydraulic lifting device Addition to registration: K 49452 XII / 47 h -Auslegeschrift 1258 692 The invention relates to an electro-hydraulic Lifting device with a lifting cylinder of small diameter that is inside the electric motor and the hollow shaft common to the pump is arranged.

Eine solche Zylinderanordnung ist in der Patentanmeldung K 49452 XII / 47h (deutsche Auslegeschrift 1258 692) eingehend beschrieben.Such a cylinder arrangement is described in detail in patent application K 49452 XII / 47h (German Auslegeschrift 1258 692).

Aufgabe der Erfindung ist es, ein Hubgerät zu schaffen, das bei geringem Zylinderquerschnitt und großem Hub ein Ausknicken der Kolbenstange verhindert.The object of the invention is to create a lifting device that with little Cylinder cross-section and long stroke prevents the piston rod from buckling.

Diese Aufgabe wird dadurch gelöst, daß zwischen dem Hubzylinder und der Motorhohlwelle eine mit der Kolbenstange verbundene Führungsbüchse angeordnet ist.This object is achieved in that between the lifting cylinder and the motor hollow shaft is arranged a guide bush connected to the piston rod is.

Die Führungsbüchse verbessert die Einspannverhältnisse der ausgefahrenen Kolbenstange. Während beim Hubgerät nach der Patentanmeldung K 49452 XII/47h (deutsche Auslegeschrift 1258 692) für die Kolbenstangen-Querschnittsbemessung gegen Ausknicken der Eulerfall I angewendet werden muß, genügt bei Vorhandensein einer Führungsbüchse die Bemessung der Querschnittsfläche nach Eulerfall III.The guide bush improves the clamping conditions of the extended piston rod. While the lifting device according to patent application K 49452 XII / 47h (German Auslegeschrift 1258 692) for the piston rod cross-section dimensioning against buckling must be applied to the Euler case I, if a guide bushing is available, the dimensioning of the cross-sectional area according to Euler case III is sufficient.

Das Hubgerät kann somit auch bei großen Hubhöhen mit kleinem Zylinderquerschnitt ausgeführt werden, wodurch ein Einbau innerhalb der Motorhohlwelle leicht möglich ist.The lifting device can therefore also be used with large lifting heights with a small cylinder cross-section are carried out, whereby an installation within the motor hollow shaft is easily possible is.

Es ist bereits bekannt, die Kolbenstange mit einer Führungsbüchse so zu verbinden, daß eine bessere Abdichtung an der Kolbenstange gewährleistet ist. Bei dieser bekannten Anordnung wird jedoch die Knickfestigkeit der Kolbenstange nicht verbessert.It is already known that the piston rod with a guide bush to be connected so that a better seal on the piston rod is guaranteed. In this known arrangement, however, the buckling strength of the piston rod not improved.

Die Erfindung wird an Hand eines Ausführungsbeispiels durch die Zeichnung näher erläutert, und zwar zeigt die Figur ein elektrohydraulisches Hubgerät mit Führungsbüchse im Schnitt.The invention is illustrated by means of an exemplary embodiment through the drawing explained in more detail, namely the figure shows an electrohydraulic lifting device Guide bush in section.

Dabei ist die Führungsbüchse 3 innerhalb der Motorhohlwelle 4 angeordnet. Innerhalb der Führungsbüchse 3 befindet sich der Hubzylinder 1, dessen Kolbenstange 2 am ausfahrenden Ende mit der Führungsbüchse 3 formschlüssig verbunden ist. Die Führungsbüchse 3 führt somit die gleiche Hubbewegung wie die Kolbenstange 2 aus. Ist die Führungsbüchse 3 entsprechend stark bemessen, so kann für die Knickbeanspruchung der Kolbenstange der Belastungsfall III nach E u 1 e r in Ansatz gebracht werden. Ein weiterer Vorteil der Führungsbüchse 3 ist darin zu sehen, daß eine Beschädigung der Kolbenstange 2 durch äußere Einflüsse ausgeschlossen ist.The guide bush 3 is arranged within the motor hollow shaft 4. Inside the guide bush 3 is the lifting cylinder 1, its piston rod 2 is positively connected to the guide bush 3 at the extending end. the Guide bush 3 thus performs the same stroke movement as piston rod 2. If the guide bush 3 is dimensioned correspondingly strong, it can be used for the buckling load the piston rod of load case III according to E u 1 e r can be applied. Another advantage of the guide bush 3 is the fact that damage the piston rod 2 is excluded by external influences.

Claims (1)

Patentanspruch: Elektrohydraulisches Hubgerät mit einem Hubzylinder von geringem Durchmesser, der innerhalb der dem Elektromotor und der Pumpe gemeinsamen Hohlwelle angeordnet ist, nach Patentanmeldung K 49452 XII / 47h (deutsche Auslegeschrift 1258 692), dadurch gekennzeichn e t, daß zwischen dem Hubzylinder (1) und der Motorhohlwelle (4) eine mit der Kolbenstange verbundene Führungsbüchse (3) angeordnet ist. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 668 064; deutsche Auslegeschrift Nr. 1056 897.Claim: Electro-hydraulic lifting device with a lifting cylinder of small diameter, which is arranged within the hollow shaft common to the electric motor and the pump, according to patent application K 49452 XII / 47h (German Auslegeschrift 1258 692), characterized in that between the lifting cylinder (1) and a guide bushing (3) connected to the piston rod is arranged on the hollow motor shaft (4). Documents considered: German Patent No. 668 064; German interpretative document No. 1056 897.
DE1963K0050573 1963-08-20 1963-08-20 Electro-hydraulic lifting device Pending DE1273948B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1963K0050573 DE1273948B (en) 1963-08-20 1963-08-20 Electro-hydraulic lifting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1963K0050573 DE1273948B (en) 1963-08-20 1963-08-20 Electro-hydraulic lifting device

Publications (1)

Publication Number Publication Date
DE1273948B true DE1273948B (en) 1968-07-25

Family

ID=7225673

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1963K0050573 Pending DE1273948B (en) 1963-08-20 1963-08-20 Electro-hydraulic lifting device

Country Status (1)

Country Link
DE (1) DE1273948B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2831226A1 (en) * 2001-10-24 2003-04-25 Snecma Moteurs Electro hydraulic actuator for aviation, has electric motor and hydraulic pump arrangement that feeds oil, with hydraulic accumulator for compensating oil volume variations

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE668064C (en) * 1936-09-20 1938-11-25 Aeg Electro-hydraulic drive device, especially for brakes and. like
DE1056897B (en) * 1956-08-13 1959-05-06 Elmeg Electrohydraulic actuator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE668064C (en) * 1936-09-20 1938-11-25 Aeg Electro-hydraulic drive device, especially for brakes and. like
DE1056897B (en) * 1956-08-13 1959-05-06 Elmeg Electrohydraulic actuator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2831226A1 (en) * 2001-10-24 2003-04-25 Snecma Moteurs Electro hydraulic actuator for aviation, has electric motor and hydraulic pump arrangement that feeds oil, with hydraulic accumulator for compensating oil volume variations
EP1306560A1 (en) * 2001-10-24 2003-05-02 Snecma Moteurs Autonomous electro-hydraulic acuator
US6796120B2 (en) 2001-10-24 2004-09-28 Snecma Moteurs Electrohydraulic actuator

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