EP0001799A1 - Dispositif de blocage pour une antenne de véhicule spatial - Google Patents
Dispositif de blocage pour une antenne de véhicule spatial Download PDFInfo
- Publication number
- EP0001799A1 EP0001799A1 EP78101210A EP78101210A EP0001799A1 EP 0001799 A1 EP0001799 A1 EP 0001799A1 EP 78101210 A EP78101210 A EP 78101210A EP 78101210 A EP78101210 A EP 78101210A EP 0001799 A1 EP0001799 A1 EP 0001799A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- axis
- pawl
- tab
- working position
- functional part
- 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.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/084—Pivotable antennas
Definitions
- the invention relates to a locking device for a functional part articulated on a carrier part, in particular for an antenna part of a spacecraft, which can be pivoted about a first axis from a rest position into a working position and can be automatically locked in the working position, with a functionally connected to the first part Axis pivotable tab and a pawl pivotable about a second axis under spring force and in the working position with the tab operatively connected, which has at least one circular arc-shaped end face.
- a locking device of this type has become known for antennas of vehicles from DE-PS 925 958.
- a rod-shaped satellite antenna articulated to a satellite body which, after removal of a heat protection shield surrounding the satellite body, is brought into a predetermined position by a spring mechanism and mechanically stabilized in this position in such a way that the rod-shaped one After reaching the working position, the sleeve surrounding the antenna part is pushed by the force of a spring into the joint area of the antenna part and the joint area, ie encloses the two articulated antenna parts.
- the invention has for its object to provide a device for a functional part articulated on a carrier part, in particular for the antenna part of a spacecraft, which the functional part pivotable from the rest position into the working position in a predetermined position, in particular for reasons of stability, with exact angular accuracy to the carrier part positioned and locked.
- the circular arc-shaped end face of the pawl has a center assigned to the second axis at a distance and the tab has a correspondingly assigned and radially outwardly oriented sliding surface with respect to the first axis, and that the sliding surface in the working position of the functional part at the point of contact of the pawl and tab acts on the end face in such a way that the tab holds the pawl in the locked state.
- the device according to the invention has the advantage that the functional part, which has already been swiveled into the working position and is still slightly oscillating - due to the interaction of the straight sliding surface with the circular end face and due to the automatic advancement of the pawl - with an angular accuracy of approximately + 0.5 degrees into the predetermined position is pressed, the tab holding the pawl in the locked state and not pushing it out again.
- the arcuate end face of the pawl is formed by an eccentrically starting from the second axis, whereby the deviation of the angular accuracy of +0.5 degrees is largely eliminated when the pawl is moved up.
- Fig. 1 denotes a section of a platform of a carrier part, not shown, for example a satellite body or spacecraft, to which a bearing block 50 designed to receive a pivotable functional part 20 is fastened by means not shown.
- the functional part 20 is, for example, an antenna part for a satellite, which can be pivoted at one end in the bearing block 50 by 180 about a first axis A arranged essentially transversely to the functional part and can be locked by a specially designed latch 30, wherein the pawl 30 is pivotally mounted on a second axis B running parallel to the axis A.
- the functional part 20 is fork-shaped at one end with two spaced-apart tabs 21, 22 (FIG. 2) which are used to hold a Bushing 23 each have a corresponding bore 24.
- the tab 22 is, in contrast to the tab 21, somewhat larger and stepped and has on one side a sliding surface 25 which interacts with the pawl 30 in the locked state.
- the bearing block 50 shown in plan view and partly in section in FIG. 2 consists of a base plate 51, two spaced apart bearings 52, 52 'fastened to the base plate, which for receiving an essentially tubular axle body forming the axis A. 60 each have a bore 53, 53 '.
- a base 55 is provided on the base plate 51, which is formed on one side for receiving an adjustment 56 consisting of a screw with a nut.
- the base 55 is provided with a contact and fastening surface 57 for two springs 61, 62 arranged between the tabs 21, 22.
- the springs 61, 62 encompassing the axle body 60 are each operatively connected to the functional part 20 with one end 61 'and 62' and fastened to the surface 57 with the other end (only 62 "shown) by appropriately designed fastening means 63 (FIG 3).
- the axle body 60 has on one side a collar 64 bearing on the bearing 52 'and is held in position on the other, opposite side by a disk 65 resting on the bearing 52 and by a screw 66 fastened in the axle body 60.
- a further bearing 54 is provided on the base plate 51 at a distance and parallel to the bearing 52 '.
- the two bearings 52 'and 54 are designed to receive an essentially tubular axle body 70 which forms the axis B.
- the pawl 30, which is pivotable about the axis B, and a spring 32 are mounted on the axle body 70, the spring being supported on the base plate 51 by one end 32 'and operatively connected to the pawl 30 by the other end 32 ".
- the axle body 70 is held in position by a threaded bolt 33 with a nut 34 between the two bearings 52 'and 54.
- a sliding disk 31 is preferably arranged between the pawl 30 and the bearing 52'.
- Fig. 3 the device is shown in section along the line III-III in Fig. 2 and one recognizes the functional part 20 shown by the force of the spring 61, 62 pivoted about the axis A by 180, which with its bevel 28 on the Adjustment 56 is present.
- the pawl 30 pivoted about the axis B by the force of the spring 32 engages with the sliding surface 25 of the bracket 22.
- 3 shows the spring end 62 ′′ held by the fastening means 63, the base 55 and the bearing 54 with the threaded bolt 33 for the mounting of the pawl 30.
- the flap 22 formed on the functional part 20 in the example shown has a first, outer segment part 22 'and, offset radially in the direction of the axis A, a second, inner segment part 22 ", which are connected to one another by the sliding surface 25.
- the sliding surface 25 is formed by a through the center of the axis A formed at a certain angle ⁇ radially outward and connecting straight line G connecting the two segment parts.
- the pawl 30, which can be pivoted about the axis B, has an end face 35 which faces the sliding surface 25 and is of circular arc shape with a radius R, the radius R from a center which is preferably arranged eccentrically to the axis B. C.
- the center C lies on a line M running through the center of the axis B in the working position and arranged parallel to the sliding surface 25 of the tab 22. Because of the interacting, designed as a flat surface sliding surface 25 with the circular arc-shaped end surface 35, the contact point S effective coefficient of friction with each pawl position the same size.
- the tab 22 acts at the point of contact S with a force P and the pawl 30, which is pivoted in by the action of the spring 32 and bears a certain friction coefficient on the sliding surface 25, with a force P '.
- the line of action W passing through the contact point S and through the axis B between a resultant P "of the force components P and P 'and a connecting point S of contact with the center C must essentially Line N directed perpendicular to the sliding surface 25, ie the eccentricity H from the axis B to the center C is to be kept as small as possible.
- the method of operation of the locking device described proceeds as follows: starting from the rest position (FIG. 1), in which the functional part 20 is held by means not shown, the pawl 30 rests under tension of the spring 32 on the outer segment part 22 'of the tab 22. After the predetermined position of the carrier part has been reached, the functional part 20 is pivoted by releasing means (not shown) by the force of the springs 61, 62 by 180 ° into the working position (FIG. 3), with the pawl 30 with the end face being pressed simultaneously by the force of the spring 32 engages in the sliding surface 25 of the tab 22.
- the force of the spring 32 is such that the pawl 30, on the one hand, engages with the sliding surface 25 quickly enough when the tab 22 is in the appropriate position and, on the other hand, the still slightly vibrating functional part by moving it into the predetermined position with an angular accuracy of the order of + Presses 0.5 degrees, whereby with appropriate dimensioning of the eccentricity H the deviation of the angular accuracy of + 0.5 degrees is still eliminated when moving up.
- the functional part 20 is positioned to an optimum of accuracy and fixed in this position self-locking.
Landscapes
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Pivots And Pivotal Connections (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH13141/77 | 1977-10-28 | ||
CH1314177 | 1977-10-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0001799A1 true EP0001799A1 (fr) | 1979-05-16 |
Family
ID=4389678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP78101210A Withdrawn EP0001799A1 (fr) | 1977-10-28 | 1978-10-24 | Dispositif de blocage pour une antenne de véhicule spatial |
Country Status (2)
Country | Link |
---|---|
US (1) | US4183490A (fr) |
EP (1) | EP0001799A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3700342A1 (de) * | 1987-01-08 | 1988-07-28 | Rheinmetall Gmbh | Submunitionskoerper mit einer zielerfassungsvorrichtung |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3120112A1 (de) * | 1981-05-20 | 1982-12-09 | Precitronic Gesellschaft für Feinmechanik und Electronic mbH, 2000 Hamburg | Sende-, empfangs- und/oder messeinrichtung mit mehrfachfunktion |
US4587526A (en) * | 1984-05-02 | 1986-05-06 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Latching mechanism for deployable/re-stowable columns useful in satellite construction |
ES2037607B1 (es) * | 1991-11-29 | 1996-08-01 | Dik Plasticos Sa | Base para antenas. |
DE19523236C1 (de) * | 1995-06-27 | 1996-11-28 | Dornier Gmbh | Gelenk für einen Auslegerarm an einem Satelliten |
CN110024217A (zh) * | 2016-12-07 | 2019-07-16 | 沃克斯国际有限公司 | 可旋转的天线安装架 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE925958C (de) * | 1952-10-08 | 1955-05-09 | Hirschmann Richard Fa | Schwenkbare Antenne fuer Fahrzeuge |
US2732730A (en) * | 1956-01-31 | Sernaker | ||
US3928952A (en) * | 1975-06-04 | 1975-12-30 | Thomas P Whyte | Antenna mount |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2158612A (en) * | 1938-08-26 | 1939-05-16 | Atwood Machine Co | Swinging spindle unit for textile machines |
US2200700A (en) * | 1939-07-13 | 1940-05-14 | Kenneth F Mills | Spindle bracket |
US2972891A (en) * | 1958-12-19 | 1961-02-28 | Elliott Mfg Company | Remotely-controllable supporting means for directional control of apparatus |
US3014679A (en) * | 1958-12-22 | 1961-12-26 | Jepson Percy | Fishing rod holder |
US3295809A (en) * | 1963-06-11 | 1967-01-03 | James F Smola | Torsion spring hinge mechanism |
US3845928A (en) * | 1973-07-30 | 1974-11-05 | Lowrance Electronics Mfg | Spring loaded transducer bracket |
JPS5290300A (en) * | 1976-01-23 | 1977-07-29 | Nhk Spring Co Ltd | Device for suspending mark plate or the like |
-
1978
- 1978-10-19 US US05/952,948 patent/US4183490A/en not_active Expired - Lifetime
- 1978-10-24 EP EP78101210A patent/EP0001799A1/fr not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2732730A (en) * | 1956-01-31 | Sernaker | ||
DE925958C (de) * | 1952-10-08 | 1955-05-09 | Hirschmann Richard Fa | Schwenkbare Antenne fuer Fahrzeuge |
US3928952A (en) * | 1975-06-04 | 1975-12-30 | Thomas P Whyte | Antenna mount |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3700342A1 (de) * | 1987-01-08 | 1988-07-28 | Rheinmetall Gmbh | Submunitionskoerper mit einer zielerfassungsvorrichtung |
Also Published As
Publication number | Publication date |
---|---|
US4183490A (en) | 1980-01-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): DE FR GB NL |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn | ||
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: MONTANARINI, MARCO, DR. DIPL. PHYS. ETH |