EP0525378A2 - Abgleichschraube - Google Patents

Abgleichschraube Download PDF

Info

Publication number
EP0525378A2
EP0525378A2 EP92110530A EP92110530A EP0525378A2 EP 0525378 A2 EP0525378 A2 EP 0525378A2 EP 92110530 A EP92110530 A EP 92110530A EP 92110530 A EP92110530 A EP 92110530A EP 0525378 A2 EP0525378 A2 EP 0525378A2
Authority
EP
European Patent Office
Prior art keywords
screw
slots
area
adjustment screw
recess
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.)
Ceased
Application number
EP92110530A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0525378A3 (enrdf_load_stackoverflow
Inventor
Konstantin Dipl.-Ing. Beis
Horst Meseck
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
ANT Nachrichtentechnik 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 Robert Bosch GmbH, ANT Nachrichtentechnik GmbH filed Critical Robert Bosch GmbH
Publication of EP0525378A2 publication Critical patent/EP0525378A2/de
Publication of EP0525378A3 publication Critical patent/EP0525378A3/xx
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices

Definitions

  • the present invention relates to a balancing screw which is slotted in the area of its external thread such that a mutual displacement of the threads above and below the slots is set in the direction of the screw longitudinal axis.
  • Such adjustment screws are used in microwave technology to e.g. Adjust waveguide resonance circuits, adjust electrical tolerances of semiconductors used in waveguides, adjust inductances of high-frequency coils or adjust trimmer capacitors to the desired capacitance and the like. It must be ensured that the adjustment screw makes safe, long-term stable contact with the respective microwave component. This is achieved in that the adjustment screw has a self-locking seat in a threaded hole into which it is screwed. Such a self-locking adjustment screw is shown in US 3,469,160. The adjusting screw has a self-locking effect in that it is provided with two slits arranged one above the other and running perpendicular to the longitudinal axis of the screw.
  • transverse slots have the effect that the threads below and above the slots are slightly offset from one another, as a result of which the screw thread is elastically braced in the thread of the threaded hole.
  • the cross slots make the adjustment screw susceptible to torsional forces. There is a risk that the self-locking adjustment screws will break in the area of the transverse slots.
  • the invention is based on the object of specifying a balancing screw of the type mentioned, which is very robust against torsional forces and ensures a secure self-locking fit.
  • the measures of the invention advantageously prevent the elastically interconnected threaded areas of the adjusting screw from twisting in a threaded hole against each other, so that the risk of destroying the adjusting screw is almost eliminated.
  • the polygonal recess as an engagement for a screwdriver also prevents it from slipping off during the adjustment process and possibly damaging the thread in the threaded hole.
  • FIG. 1 is a longitudinal section A-A and FIG. 2 is a top view with a partial section B-B of an adjustment screw.
  • This is provided in its upper part with an external thread 1 in order to be able to screw it into a threaded hole (not shown in the drawing), for example a waveguide.
  • the lower part 2 of the adjustment screw is threadless and protrudes into the interior of the waveguide in order to influence the field spreading therein in the desired manner.
  • the external thread 1 is divided into two threaded areas 4 and 5 by a recess 3 running radially on the circumference of the adjusting screw.
  • a polygonal recess (e.g. hexagon) 6 serving as an engagement for a screwdriver is embedded in the upper part of the adjustment screw.
  • This polygonal recess 6 extends into the threaded area 5 below the recess 3.
  • the wall 7 existing between the recess 3 and the polygonal recess 6 is feathered by slots 8 running in the direction of the screw longitudinal axis.
  • the adjustment screw described above can be manufactured in the following process steps with little effort.
  • the external thread 1 is cut on a bolt that will later form the adjustment screw.
  • the polygonal recess is then milled.
  • the recess 3 is then unscrewed from the thread 1. This creates the slots 8 in the recess 3 where the polygonal recess 6 has its edges.

Landscapes

  • Mutual Connection Of Rods And Tubes (AREA)
EP92110530A 1991-07-17 1992-06-23 Abgleichschraube Ceased EP0525378A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4123631 1991-07-17
DE19914123631 DE4123631C1 (enrdf_load_stackoverflow) 1991-07-17 1991-07-17

Publications (2)

Publication Number Publication Date
EP0525378A2 true EP0525378A2 (de) 1993-02-03
EP0525378A3 EP0525378A3 (enrdf_load_stackoverflow) 1994-03-23

Family

ID=6436326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92110530A Ceased EP0525378A2 (de) 1991-07-17 1992-06-23 Abgleichschraube

Country Status (2)

Country Link
EP (1) EP0525378A2 (enrdf_load_stackoverflow)
DE (1) DE4123631C1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6384699B1 (en) 1999-04-14 2002-05-07 Telefonaktiebolaget Lm Ericsson (Publ) Tuning arrangement for a cavity filter
CN105179437A (zh) * 2015-10-04 2015-12-23 陈宁 一种反向螺母装配结构及其工艺方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2395016C1 (ru) * 2009-06-08 2010-07-20 Общество с ограниченной ответственностью "Пермэнергокомплект" Крепежное изделие

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2166686A (en) * 1937-04-22 1939-07-18 Eaton Mfg Co Self-locking adjusting screw
US2542377A (en) * 1946-12-21 1951-02-20 Eaton Mfg Co Self-locking screw
US2830635A (en) * 1954-07-20 1958-04-15 Harold C Thorstens Self-locking set screw having frangible intermediate portion
BE562985A (enrdf_load_stackoverflow) * 1957-06-20
DE1278571B (de) * 1966-03-29 1968-09-26 Siemens Ag Mikrowellenbauteil mit Abgleichschraube
US3469160A (en) * 1967-09-05 1969-09-23 Johanson Mfg Adjustable low-pass capacitor
DE2839495A1 (de) * 1977-09-20 1979-03-29 Torben Bredal Verankerungsbuchse

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6384699B1 (en) 1999-04-14 2002-05-07 Telefonaktiebolaget Lm Ericsson (Publ) Tuning arrangement for a cavity filter
CN105179437A (zh) * 2015-10-04 2015-12-23 陈宁 一种反向螺母装配结构及其工艺方法

Also Published As

Publication number Publication date
EP0525378A3 (enrdf_load_stackoverflow) 1994-03-23
DE4123631C1 (enrdf_load_stackoverflow) 1992-12-10

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