EP0179180A1 - Engrenage à roues coniques - Google Patents

Engrenage à roues coniques Download PDF

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Publication number
EP0179180A1
EP0179180A1 EP84850306A EP84850306A EP0179180A1 EP 0179180 A1 EP0179180 A1 EP 0179180A1 EP 84850306 A EP84850306 A EP 84850306A EP 84850306 A EP84850306 A EP 84850306A EP 0179180 A1 EP0179180 A1 EP 0179180A1
Authority
EP
European Patent Office
Prior art keywords
housing
bevel gear
shaft
collar
gear
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
Application number
EP84850306A
Other languages
German (de)
English (en)
Other versions
EP0179180B1 (fr
Inventor
Hans Brolin
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.)
Turnils AB
Original Assignee
PERMA SYSTEM AB
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8193130&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0179180(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by PERMA SYSTEM AB filed Critical PERMA SYSTEM AB
Priority to EP84850306A priority Critical patent/EP0179180B1/fr
Priority to AT84850306T priority patent/ATE34427T1/de
Priority to DE8484850306T priority patent/DE3471339D1/de
Publication of EP0179180A1 publication Critical patent/EP0179180A1/fr
Application granted granted Critical
Publication of EP0179180B1 publication Critical patent/EP0179180B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/68—Operating devices or mechanisms, e.g. with electric drive
    • E06B9/76—Operating devices or mechanisms, e.g. with electric drive using crank handles
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor

Definitions

  • the present invention relates to a bevel gear of the kind disclosed in the preamble of the accompanying claim 1.
  • a gear of this kind is known and is used in operating sun .shields such as venetian blinds, awnings, revolving shutters etc., with the aid of a shaft which is provided with a crank.
  • sun shield e.g. when angling the slats of a venetian blind and raising it, or when pulling out and retracting an awning
  • the end of the shaft provided with said crank is inserted into a hollow input shaft of the bevel gear and the crank is turned.
  • the sun shield When the crank is turned clockwise it is desired that the sun shield shall expose the window, but when the crank is turned counter clockwise the shield shall cover the window, at the upper edge of which the shield is mounted.
  • the bevel gear must sometimes be arranged at the left hand end and sometimes at the right hand end of a longitudinal operating shaft by which the shield is operated. This creates a problem with the known bevel gear, since two different models must be marketed, one for mounting to the let and the other for mounting to the right of the longitudinal operating shaft.
  • Another problem with the known bevel gear is that for its assembly with the sun shield a separate holder is required for fixing the bevel gear at a desired angular attitude of its hollow input shaft relative a vertical plane.
  • the holder is fitted into a base member, which is arranged in the upper area of the window and, inter alia, accommodates the mentioned longitudinal operating shaft.
  • the same holder means can be used irrespective of whether the bevel gear is intended for right- or left-hand fitting, but merely the fact that a separate holder means must be fitted into the base member is a disadvantage, partly since separate holder means must then be kept in stock and partly in that fitting the bevel gear in the base member is complicated and time- consuming.
  • the present invention attempts to mitigate the above- mentioned problems with the known bevel gear and has the object of achieving a bevel gear which can be used for both right- and left-hand fitting.
  • the feature enabling the same gear to be used for both purposes are apparent from the characterizing portion of the appended claim 1.
  • the features enabling the omission of a separate holder means for setting the angular attitude of the input shaft relative a vertical plane are apparent from the particular embodiment described in claim 6.
  • Figure 1 illustrates a known bevel gear 1, intended to be mounted on a longitudinal operating shaft 2 in a base member 3 with the aid of a holder 4 for the gear.
  • the sun shield With the aid of a shaft associated with a crank means 5, the sun shield, a venetian blind in this embodiment of the invention, may be raised and lowered with the aid of a lifting cord 6, and angled with the aid of a ladder cord 7.
  • the setting movements of the blind are achieved by turning the longitudinal shaft 2, whereby means, not shown but accommodated in the base member and driven by the shaft then coacts with the lifting and ladder cords.
  • the venetian blind is conventionally raised when the crank means 5 is rotated clockwise. If, for example, the space round the base member does not allow the gear to be placed to the right as in Fig. 1, it may have to be placed to the left in the member. For such left-hand fitting the blind must still go up when the crank means is turned clockwise.
  • the known bevel gear illustrated in Fig. 2 is provided with a housing 8 having two chambers 9 and 10.
  • a bevel gear wheel 11 driven by a bevel pinion 12, which is non-rotatably disposed on the input shaft 13 of the gear, can be placed in either one of the two chambers 9 and 10, depending on whether the gear is to be fitted to the left or to the right.
  • the bevel gear is suitable for fitting to the left. If the gear is to be used for right-hand fitting, the wheel 11 must be arranged in the chamber 10 so that the output shaft 14 of the gear will rotate in a direction causing the blind to be raised when the crank means is rotated clockwise.
  • the wheel 11 is non-rotatably disposed, e.g. with the aid of splines, on a hollow shaft 15 which, with the aid of a claw coupling generally denoted by 16, is in power transmission communication with the output shaft 14 via a friction clutch 17.
  • the hollow output shaft 14 extends between the two end walls 18 and 19 of the bevel gear housing 8.
  • the bevel gear is mounted on the longitudinal shaft 2 and thrust into the holder 4 which is then put into the base member 3.
  • the housing 8 is subsequently turned until the input shaft forms the desired angular attitude relative the vertical plane, after which the position of the housing in the holder 4 is fixed by tightening a set screw 20 on the holder 4 (see Figure 1).
  • the angular attitude mentioned varies from installation, and is, inter alia, dependent on whether the sun shield is to be operated from the outside or inside of the window.
  • FIG. 3 illustrates a bevel gear 25 in accordance with the present invention.
  • the gear includes two cylindrically shaped housings 26, 27, which are mutually in register axially and are rotatable relative each other.
  • the housing 27 is provided with holder means 28 for fitting the gear into the base member 3 without an intermediate holder.
  • the gear has an input shaft 29 and an output shaft 30.
  • the input shaft is in the housing 26, the angular attitude of which, relative the housing 27, can be locked with the aid of a set screw 31. Fitting the gear is thus considerably facilitated.
  • the output shaft thus only needs to be mounted on the longitudinal operating shaft 2, and the housing 27 inserted into the base member, after which the housing 26 is turned until the input shaft 29 forms the desired angle to the vertical plane. The desired position is then fixed with the aid of the stop screw 31.
  • Figure 4 illustrates the bevel gear 25 in cross section.
  • the gist of the invention is that the input shaft 29 is accessible to the shaft of the crank means 5 from two diametrically opposed sides of the input shaft, in contradistinction to the known gear, where the input shaft is only accessible from the side on which the bevel pinion 12 is mounted. Since the inut shaft 29 is accessible from said two diametrically opposed sides, the output shaft 30 can be caused to rotate in the desired direction independent of whether the bevel gear 25 is fitted to the left or to the right.
  • the housing 26 is positioned so that the tip of the shaft portion of the crank means is inserted either through an opening 32 in the wall of the housing 26 or through the diametrically opposing opening 33.
  • the gear according to the invention is provided with a bearing block 34 in the form of a solid, substantially rectangular resin block.
  • the bearing block 34 has a first through bore 35, in one end of which the input shaft 29 is rotatably mounted, and in the other end of which a resin tube 36 is disposed.
  • a bevel pinion 37 is non-rotatably mounted on the input shaft 29.
  • the input shaft 29 and the pinion 37 are preferably cast integrally and in metal.
  • From one side wall the bearing block 34 has a projecting annular collar 38 on which is mounted a bevel gear wheel 39.
  • the bevel gear wheel is in a plane normal to that of the pinion 37, with which it is in mesh.
  • the bevel gear wheel 39 has a projecting annular collar 40, the internal surface 41 of which forms a journalling surface for one end portion of the output shaft 30.
  • the external cylindrical surface 42 of the collar 40 is rotatably mounted in an annular flange portion 43 projecting axially of the housing 26.
  • the diameter of the flange 43 is less than the diameter of the rest of the housing 26.
  • the bevel gear wheel 39 is connected to the output shaft 30 via a claw coupling 44 and a friction clutch 45 which completely corrspond to the known coupling 16 and friction clutch 17.
  • the output shaft 30 has a first portion 46 with a first diameter, a second portion 47 with a second diameter and a third portion 48 with a third diameter.
  • the first portion 46 is rotatably mounted in a tube 49, constituting a portion of the friction clutch.
  • the tube 49 is non-rotably supported in forward front wall 50 of the housing 27.
  • the front wall 50 has a central circular opening 51 with two diametrically opposing projections 52, 53 whch have the form of circular pins directed radially inwardly in the opening. Said projections fit in two corresponding holes in the tube 49, these holes being thus diametrically opposite each other at the end of the tube.
  • the second end portion 47 of the output shaft is rotatably mounted on the internal surface 41 of the collar 40, and the third portion 48 is rotatably mounted on an internal surface 52' of a recess in the end surface of the projecting annular collar 38 of the bearing block 34.
  • the bearing block 34 has a second through bore 53, axially in line with the longitudinal axis of the output shaft 30, this axis being in the same plane as the first through bore 35 and forming a right angle to the first bore.
  • the bevel gear thus has an axially central through opening, through which a longitudinal operating shaft 2 can be inserted and locked in position by a set screw 54.
  • the bearing block 34 At its side surface facing away from the collar 38 the bearing block 34 has a projecting annular boss 55, accommodated in an opening 56 in the wall of the housing 26.
  • the opening 56 is concentric with the shaft 30.
  • the tube 36 in the first through bore 35 of the bearing block is at its top end portion provided with a flange 57, which is in contact with the inside wall of the housing 26.
  • the bearing block 34 finally has two lugs 58, 59 which is most clearly apparent form Figures 7 and 8, these lugs resting in two complementary formed depressions 60, 61 (see Fig. 7) in the wall surface of the bearing housing 26, which is divided into two halves 62, 63.
  • the upper housing half 62 has corresponding depressions, not shown, in its wall, whereby screws, not shown, going through the openings in the lugs 58, 59 keep the housing halves 62, 63 and the bearing block 34 together.
  • the housing 27 is also divided into two housing halves 64, 65, which are substantially symmetrical, and have a radially inwardly directed flange 66 at their ends facing away from the front wall 50, this flange fitting into a groove 67 made in the collar 43.
  • the housings 26 och 27 are thus rotatable relative each other, and rotating the housing 27 relative the housing 26 results in mutual relative movement of the bevel pinion and the bevel gear wheel.
  • Figures 5-8 are now referred to for creating a clear picture of how the bevel gear and the coupling included with it are built up. From Figure 5 it is apparent that the gear wheel 39 has a follower 70 projecting from its collar 40 in the form of a tongue, which constitutes an extended portion of the collar 40.
  • the detail in the middle of Fig. 5 is the output shaft 30 with its first, second and third portions. Between the first and second portions there is a fourth portion 71, forming the bottom of, and integral with, a cylindrical shell 72 with a cut-away portion.
  • the coupling coacts with the mentioned tube 49 and a helical spring 73 tightly wound onto the tube, the tube and spring forming a clutch.
  • the two ends of the spring are bent out radially to project a distance above the cylindrical body of the spring as illustrated by the reference numeral 74 in Fig. 4.
  • the two bend-out spring ends are at an angular distance from each other which is greater than the angular distance the tongue 70 takes up when the shaft is mounted in the bevel gear wheel 39 in the manner illustrated in Fig. 6.
  • the mentioned angular distance between the spring ends is less than the angular distance the cut-away portion of the shell 72 takes up.
  • the claw coupling and clutch function such that when the gear wheel 39 is turned, the tongue will come into engagement against one or other spring end and will urge the spring in a direction tending to loosen the turns thereof round the tube, the spring then relinquishing its tight engagement round the tube and turning until the corresponding projecting spring end comes into engagement against one or other edge of the cut-away portion of the shell 72 for transmitting the rotational movement to the output shaft.
  • the shell which is non-rotably disposed on the cylindrical shaft, will come into engagement with one or the other spring end and urge it in a direction tending to clamp the spring so hard round the tube 49 that the spring can not move relative the tube, resulting in that one or other projecting spring end cannot move the tongue.
  • the bevel gear wheel is placed on the collar 38 serving as a bearing on the bearing block 34.
  • the gear wheel 39 has a journalling surface 75 for this purpose (cf. Fig. 4).
  • the unit thus formed is shown to the right in Fig. 7, and this unit is then placed in the lower housing half 63, after the input shaft 29 and its bevel pinion 37 have been placed in the opening 32 in the housing half 63.
  • the lugs 58, 59 on the bearing block are fitted into the depressions 60 and 61 at the same time as the pinion and the gear wheel will mesh with each other, the collar 40 being rotatably carried by its external surface serving as a journalling surface.
  • the lower housing half 65 of the housing 27 is then put in place, forming the unit illustrated in Fig. 8, which illustrates the bevel gear of Fig. 4 seen from above.
  • the bevel gear can be made with a single split housing similar to the one in Fig. 1 which is mounted in a holder 4. Thereafter the desired angular attitude of the input shaft is put into proper relation with the vertical plane and the housing fixed in the holder 4 with the aid of a set of screw 31.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Gear Transmission (AREA)
  • Retarders (AREA)
  • Transmission Devices (AREA)
  • Gears, Cams (AREA)
EP84850306A 1984-10-16 1984-10-16 Engrenage à roues coniques Expired EP0179180B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP84850306A EP0179180B1 (fr) 1984-10-16 1984-10-16 Engrenage à roues coniques
AT84850306T ATE34427T1 (de) 1984-10-16 1984-10-16 Kegelradgetriebe.
DE8484850306T DE3471339D1 (de) 1984-10-16 1984-10-16 Bevel gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84850306A EP0179180B1 (fr) 1984-10-16 1984-10-16 Engrenage à roues coniques

Publications (2)

Publication Number Publication Date
EP0179180A1 true EP0179180A1 (fr) 1986-04-30
EP0179180B1 EP0179180B1 (fr) 1988-05-18

Family

ID=8193130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84850306A Expired EP0179180B1 (fr) 1984-10-16 1984-10-16 Engrenage à roues coniques

Country Status (3)

Country Link
EP (1) EP0179180B1 (fr)
AT (1) ATE34427T1 (fr)
DE (1) DE3471339D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621644A1 (fr) * 1987-10-07 1989-04-14 Feller Samuel Perfectionnements apportes aux systemes de commande de volets roulants avec couple conique
EP0600133A1 (fr) * 1992-12-04 1994-06-08 Nien Made Enterprise Co., Ltd. Dispositif d'inclinaison
US20150225997A1 (en) * 2012-07-19 2015-08-13 R. Soper Ltd Raising/lowering mechanism for a roller blind
CN105499609A (zh) * 2016-01-13 2016-04-20 成都佳美嘉科技有限公司 一种数控机床主轴

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015219879A1 (de) * 2015-10-14 2017-04-20 Zf Friedrichshafen Ag Formschlüssige Fixierung von Gehäuseteilen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR722442A (fr) * 1931-09-04 1932-03-16 Baumann Et Fils Soc Dispositif de commande par pignons d'angle
GB928627A (en) * 1961-09-12 1963-06-12 Fortschritt Erntebergungsmasch Improvements in or relating to gear arrangements
GB974772A (en) * 1961-06-09 1964-11-11 Hunter Douglas Int Quebec Ltd A self-braking driving device for the operating shaft of a venetian blind, rolling-shutter or similar closure means
GB976928A (en) * 1961-06-21 1964-12-02 Bretscher & Co Improvements in or relating to self-locking drive mechanism for venetian blinds

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR722442A (fr) * 1931-09-04 1932-03-16 Baumann Et Fils Soc Dispositif de commande par pignons d'angle
GB974772A (en) * 1961-06-09 1964-11-11 Hunter Douglas Int Quebec Ltd A self-braking driving device for the operating shaft of a venetian blind, rolling-shutter or similar closure means
GB976928A (en) * 1961-06-21 1964-12-02 Bretscher & Co Improvements in or relating to self-locking drive mechanism for venetian blinds
GB928627A (en) * 1961-09-12 1963-06-12 Fortschritt Erntebergungsmasch Improvements in or relating to gear arrangements

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621644A1 (fr) * 1987-10-07 1989-04-14 Feller Samuel Perfectionnements apportes aux systemes de commande de volets roulants avec couple conique
EP0600133A1 (fr) * 1992-12-04 1994-06-08 Nien Made Enterprise Co., Ltd. Dispositif d'inclinaison
US20150225997A1 (en) * 2012-07-19 2015-08-13 R. Soper Ltd Raising/lowering mechanism for a roller blind
CN105499609A (zh) * 2016-01-13 2016-04-20 成都佳美嘉科技有限公司 一种数控机床主轴

Also Published As

Publication number Publication date
EP0179180B1 (fr) 1988-05-18
ATE34427T1 (de) 1988-06-15
DE3471339D1 (de) 1988-06-23

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