EP0062811A2 - Dispositif de levage - Google Patents

Dispositif de levage Download PDF

Info

Publication number
EP0062811A2
EP0062811A2 EP82102548A EP82102548A EP0062811A2 EP 0062811 A2 EP0062811 A2 EP 0062811A2 EP 82102548 A EP82102548 A EP 82102548A EP 82102548 A EP82102548 A EP 82102548A EP 0062811 A2 EP0062811 A2 EP 0062811A2
Authority
EP
European Patent Office
Prior art keywords
flywheel
rope
pulley
cable
hoist according
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Withdrawn
Application number
EP82102548A
Other languages
German (de)
English (en)
Other versions
EP0062811A3 (fr
Inventor
Gerhard Fischer
Harald Dipl.-Ing. Berger
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.)
PIEDMONT SECURITIES Co Establishment
Original Assignee
PIEDMONT SECURITIES Co Establishment
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 PIEDMONT SECURITIES Co Establishment filed Critical PIEDMONT SECURITIES Co Establishment
Publication of EP0062811A2 publication Critical patent/EP0062811A2/fr
Publication of EP0062811A3 publication Critical patent/EP0062811A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/18—Power-operated hoists

Definitions

  • the invention relates to a hoist, which consists of a pulley set inserted in a cylinder-like housing and connected by a load cable to one another, one set of cable wheels arranged in a fixed position and the other of which can be displaced by means of a piston which can be acted upon by pressure medium on one or both sides, and the piston a braking device is assigned, by means of which the adjustment movement can be braked if a predetermined maximum value is exceeded.
  • a lifting device equipped with a braking device is known, by means of which the adjustment movement of the piston, which is connected via piston rods passed through an intermediate flange to a component on the opposite side that carries the adjustable cable wheel set, when a maximum value is exceeded can be slowed down.
  • the braking device in this case consists of a closed cylinder fastened to the adjusting piston and filled with a liquid or gaseous medium, a separating piston fixedly arranged in the cylinder and through which the cylinder enters a first and a second cylinder space is subdivided, and a throttle and shut-off device inserted into a connecting line incorporated in the separating piston.
  • the mechanically acting braking device assigned to one of the cable wheel sets consists of a flywheel which is frictionally or elastically connected to one of the cable reels of the respective cable wheel set and is drivably connected in the axial direction of the cable reel via a thread and one formed by the component of the hoist which receives this pulley or a separate axially supported counter bearing, and in that the flywheel and the counter bearing are each provided with one or more interacting braking surfaces on facing end faces.
  • the rope pulley connected to the flywheel has an axially directed projection, on the outer and inner surface of which the thread provided for the drive connection to the flywheel is machined.
  • the flywheel should be supported on the rope pulley by means of one or more springs in the axial direction of the rope pulley, this being able to be accomplished by means of a concentrically arranged compression spring which is held on the attachment of the rope pulley, for example by means of a ring or a collar, and is incorporated into one in the flywheel ring-shaped relief is used.
  • a spiral spring or the like can be used for the elastic connection of the flywheel with the assigned pulley. be provided, which is supported on the flywheel and the pulley.
  • the counter bearing can advantageously also be formed by a plate which is preferably arranged on the shaft carrying the brakable cable pulley and is supported in a rotationally fixed manner on an end cover of the hoist.
  • the rope pulley provided with the attachment can be supported in the axial direction immovably on the shaft carrying it, so that only this rope pulley is braced with the component designed as a cover or the counter bearing.
  • the rope pulleys of the rope wheel set provided with the braking device so that they can be displaced axially to a limited extent on the shaft carrying them, and to brace them axially by means of the flywheel in the component or the counter bearing accommodating them. It is appropriate here to arrange compression springs, preferably leaf springs, between adjacent rope pulleys of the rope wheel set provided with the braking device for mutual support and return.
  • the friction surfaces of the flywheel and / or the counter-bearing can with a reibungserhöh e d e n n covering or be provided with Reibrillen.
  • a hoist of the type mentioned at the outset is equipped with a braking device which is automatically triggered by the adjustment speed of the load rope and is designed according to the invention, by means of which the adjustment speed is limited or its adjustment movement and thus also the adjustment speed of the piston is stopped when a predetermined acceleration is exceeded, this is ensured that even if the adjusting piston is suddenly relieved, it will not be moved into its end position at a high speed and that the rope may spring up.
  • the braking device which is designed in a simple manner and thus can be manufactured economically, enables a continuously adjustable displacement of the adjusting piston in an adjusting direction, so that the load rope and, as a result, possibly associated accident hazards are reliably prevented.
  • the hoist shown in Fig. 1 and designated 1 for lifting or lowering a load 3 attached to a load rope 2 consists essentially of a block and tackle 1 0 , which is formed from two sets of pulley wheels 21 and 31, via the pulleys 23 and 33 of the load rope 2 is performed.
  • the two pulley sets 21 and 31 forming pulley 10 are in this case arranged in a closed housing which consists of a pressure cylinder 11 and the two covers 12 and 13 which close the latter.
  • the covers 12 and 13 can be firmly connected to one another by means of tie rods 14, which are guided along the outside of the pressure cylinder 11.
  • the stationary cable wheel set 21 is arranged in the cover 12, which has a recess 22 for this purpose.
  • the individual rope pulleys 23, over which the load rope 2 is guided, are rotatably mounted by means of a shaft 24, which is inserted into a bore 25 of the cover 12 and held by a threaded pin 26.
  • a piston 15 is provided which also has a recess 32 for receiving the cable pulleys 33 mounted on a shaft 34 inserted in a bore 35.
  • the piston 15 is guided in the cylinder 11 and separates it, since a seal 36 inserted into the piston 15 bears sealingly against the inner wall of the cylinder 11, into the two pressure chambers 29 and 38, to which pressure medium is alternately supplied through the connections 16 and 17, respectively can be. And since the cylinder 11 by means of seals 28 and 37 with respect to the covers 12 and 13 and also the passage 18 of the load rope 2 through the cover. 13 are sealed, the hoist 1, or the like on a bearing against the surfaces 2o. can be fastened by holding means that can be screwed into the threaded bores 19, is a closed unit.
  • connection 16 If pressure medium is supplied to the pressure chamber 29 via the connection 16, a pressure builds up in it and the piston 15 and the cable wheel set 31 firmly connected to it are shifted to the right. Via connection 17 the pressure chamber 38 is vented. This displacement of the piston 15 thus raises the load hanging on the load rope 2.
  • the load 3 can be lowered by its own weight and by venting the pressure chamber 29, but it is also possible to supply pressure medium to the pressure chamber 38. So that the j-rope pulleys 23 and 33 do not come into contact with one another when the piston 15 is returned, spacer bolts 27 are inserted into the cover, which are supported on the contact surface 39 of the piston 15.
  • the piston 15 would be very quickly moved into the right end position since no counterforce is being exerted, and the load cable 2 would u. U. soar.
  • the hoist 1 is equipped with a braking device 41, by means of which the. Acceleration of the load rope 2 is limited to a maximum value or by means of which the adjustment movement is stopped when it is exceeded, so that a sudden tightening of the load rope 2 is excluded.
  • the braking device 41 consists here, as can be seen in detail in FIG. 2, of a flywheel 42, which is frictionally and drivingly connected to one of the outer pulleys 23 'of the pulley set 21, and the this receiving cover 12, which is thus effective as a counter bearing.
  • friction surfaces 43 and 53 are provided on the mutually facing end faces, which come into contact with one another when the flywheel 42 is axially displaced.
  • the rope pulley 23 ' is provided with an axially directed projection 46, in the outer surface of which a thread 47 is machined and in the flywheel 42 a counter thread 45 is machined so that this is held axially displaceably on the projection 46.
  • a compression spring 5 which is inserted into a cutout 49 of the flywheel 42 and which is supported on this and by means of a ring 48 at the rope pulley 23 ', the flywheel 42 is pressed against, and is with the face 44 of the latter.
  • the braking of the load rope 2 can be carried out either by means of the rope pulley 23 'or all rope pulleys of the rope wheel set 2 1 . If only the rope pulley 23 'is to be braked, it must be axially immovable to the left in the embodiment according to FIG. 2 by means of a ring 51 inserted into the shaft 24 and the stop surface 52 provided thereon. In addition, the load rope 2 should be placed two or more times around the pulley 23 '. However, it is also possible to support the cable pulley 23 'on the cable pulleys 23 rotatably mounted on the shaft 24 by means of roller bearings 23 ", so that these are also braced with the cover 12 when the flywheel 42 is in contact with the cover 12.
  • the cable pulleys 23 are supported thereby facing each other or the outermost rope pulley 23 on the counter surface 54 of the cover 12, so that the entire rope wheel set 21 is blocked when the acceleration is too strong the rope pulleys 23 in the starting position are arranged between these disc springs 55.
  • the braking device 71 is formed from a flywheel 72 and a counter bearing 73, which is supported on the shaft 63 carrying the rope pulleys 65 and 66 of the rope gear set 64.
  • the counter bearing 73 here consists of a rectangular plate 73 ', which rests with an end face on the inside on a cover 62, by which the housing 61 of the lifting device 1' is closed.
  • the rope pulley 66 adjacent to the flywheel 72 which is provided with a wider guide groove 67 for the multiple wrapping of the load rope 2 'than the rope pulley 65, has an axially directed extension 68, on the external thread 69 of which the flywheel 72 is screwed on by means of a thread 8o .
  • the flywheel 72 which is elastically connected to the rope pulley 66 via a spiral spring 79 attached to pins 77 and 78, is rotated relative to the latter.
  • the flywheel 72 can namely not be accelerated in the same way as this via the interposed spring 79, since there is thus no rigid drive connection with the rope pulley 66, so that a relative movement between the rope pulley 66 and the flywheel 72 is caused.
  • the return of the flywheel 72 in the illustrated training g a ngslage is accomplished by means of the coil spring 79, which was deformed during relative rotation. And to preclude the flywheel 72 to fix this on the facing end face of the pulley 66 itself, are se into diesel, for example, three recesses 83 balls 82 used, on which the flywheel can be supported 72nd

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)
  • Braking Arrangements (AREA)
  • Emergency Lowering Means (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
EP82102548A 1981-04-15 1982-03-26 Dispositif de levage Withdrawn EP0062811A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3115205A DE3115205C2 (de) 1981-04-15 1981-04-15 Hebezeug
DE3115205 1981-04-15

Publications (2)

Publication Number Publication Date
EP0062811A2 true EP0062811A2 (fr) 1982-10-20
EP0062811A3 EP0062811A3 (fr) 1983-06-29

Family

ID=6130199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102548A Withdrawn EP0062811A3 (fr) 1981-04-15 1982-03-26 Dispositif de levage

Country Status (8)

Country Link
EP (1) EP0062811A3 (fr)
JP (1) JPS57180593A (fr)
AU (1) AU8213782A (fr)
BR (1) BR8202156A (fr)
DE (1) DE3115205C2 (fr)
ES (1) ES511392A0 (fr)
YU (1) YU78582A (fr)
ZA (1) ZA822564B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2740765A1 (fr) * 1995-11-03 1997-05-09 Gillet Outillage Mecanisme de traction a cabestan et outillages ainsi equipes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01152992U (fr) * 1988-04-12 1989-10-20

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE38430C (de) * E. V. V. de P. DESDROUITS in Paris, 48 Rue de Bondy Schraubenbremse mit Schwungmassenwirkung für Hebezeuge
DE808277C (de) * 1948-09-23 1951-07-12 Donald Philipps Smallpei Cosby Hydraulisch betaetigtes Hebezeug
GB777963A (en) * 1954-07-30 1957-07-03 Campbell & Isherwood Ltd Improvements in or relating to hoists and like lifting or lowering apparatus
US3286989A (en) * 1965-10-19 1966-11-22 Ingersoll Rand Co Balancing hoist
US3368796A (en) * 1967-03-09 1968-02-13 Ingersoll Rand Co Control apparatus for balancing hoists
US3669411A (en) * 1970-03-26 1972-06-13 Lorne J Mckendrick Load balancer
US3675899A (en) * 1970-05-27 1972-07-11 Lorne J Mckendrick Hoist and balancing apparatus
BE887168Q (fr) * 1976-12-20 1981-05-14 Piedmont Securities Cy Establi Engin de levage
DE7934679U1 (de) * 1979-12-10 1980-04-30 Fischer, Gerhard, 7758 Meersburg Hebezeug

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2740765A1 (fr) * 1995-11-03 1997-05-09 Gillet Outillage Mecanisme de traction a cabestan et outillages ainsi equipes

Also Published As

Publication number Publication date
BR8202156A (pt) 1983-03-29
ES8303238A1 (es) 1983-02-16
JPS57180593A (en) 1982-11-06
DE3115205C2 (de) 1983-01-13
AU8213782A (en) 1982-10-21
YU78582A (en) 1986-12-31
EP0062811A3 (fr) 1983-06-29
ZA822564B (en) 1983-03-30
DE3115205A1 (de) 1982-10-28
ES511392A0 (es) 1983-02-16

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PUAL Search report despatched

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Effective date: 19840301

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BERGER, HARALD, DIPL.-ING.

Inventor name: FISCHER, GERHARD