EP0338613A2 - Sperrvorrichtung für einen Zahnradaufzug - Google Patents

Sperrvorrichtung für einen Zahnradaufzug Download PDF

Info

Publication number
EP0338613A2
EP0338613A2 EP89200894A EP89200894A EP0338613A2 EP 0338613 A2 EP0338613 A2 EP 0338613A2 EP 89200894 A EP89200894 A EP 89200894A EP 89200894 A EP89200894 A EP 89200894A EP 0338613 A2 EP0338613 A2 EP 0338613A2
Authority
EP
European Patent Office
Prior art keywords
shaft
engagement
blocking member
abutment
blocking
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
EP89200894A
Other languages
English (en)
French (fr)
Other versions
EP0338613B1 (de
EP0338613A3 (en
Inventor
Äke Johansson
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.)
Alimak AB
Original Assignee
Alimak 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
Application filed by Alimak AB filed Critical Alimak AB
Publication of EP0338613A2 publication Critical patent/EP0338613A2/de
Publication of EP0338613A3 publication Critical patent/EP0338613A3/en
Application granted granted Critical
Publication of EP0338613B1 publication Critical patent/EP0338613B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
    • B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces

Definitions

  • the present invention relates to a catch apparatus for a rack lift, with a tooth wheel engaging the rack and unrotatably mounted on a shaft, which also carries two friction members, which are spring tensioned towards each other for mutual frictional engagement, and of which on is unrotatably carried by the shaft, and the other one is glidingly supported on the shaft but normally co-rotating through the frictional engagement, an inertia blocking mechanism, being arranged to stop the other friction member at exceeding of a limit velocity of the shaft, for thereby braking the shaft through the frictional engagement.
  • the object of the invention is to effect a safer and more reliable braking of the lift than has hitherto-been-possible with such an apparatus.
  • the blocking mechanism includes a blocking member which is suspended for pendulum movement in a plane extending transversely to the shaft in order to be clamped, when the limit velocity is exceeded, between a fixed abutment and an abutment carried by the other friction member.
  • FIG. 1 partly in section shows a catch apparatus according to the invention in the direction of arrows I-I in Fig. 2, and Fig. 2 illustrates the catch apparatus in the direction of arrows 11-11 in Fig. 1.
  • the catch apparatus has a tooth wheel 4 in engagement with the rack, not shown, and non-rotatably connected to a shaft 4.
  • the shaft 4 is journalled at 6 in a base plate 8 which is fixedly connected to the lift cage and intended to be vertically mounted.
  • a yoke 10 is mounted in the same horizontal plane as the shaft 4.
  • the yoke 10 has a central opening for the shaft 4 and elements connected thereto, which will be described more closely below.
  • the yoke 8 carries a casing 12 for the catch apparatus. More particularly the casing 12 is attached to the yoke 8 by means of screwed joints 14.
  • the shaft 4 non-rotatably carries a wheel 16 with a conically extending peripheral surface.
  • the wheel 16 is recessed in a bowl 18 normally rotating with the shaft 4.
  • the bowl 18 has a conical inner wall mating with the conical periphery of the wheel 16. Between the conical surfaces of the wheel 16 and the bowl 18 a friction lining is arranged.
  • the bowl 18 is seated on the shaft 4 via a slide bearing 20.
  • Above the bowl 18 the shaft 4 carries a sleeve 22 which is journalled in the opening of the yoke 8 by means of bearings 24. Below the yoke 10 the sleeve 22 is widening into a cup shaped housing 26 for a disc spring package 28.
  • the sleeve 22 is kept in place on the end of the shaft 4 by means of an end plate 30, which is attached to the shaft 4 by means of four screws 32. More particularly, a shoulder 34 of the plate 30 presses against the end of the sleeve 22 via a washer 36.
  • the bowl 18 has two externally profiled shoulders 38 and 40.
  • the shoulder 38 has a hexagonal shape, as appears from the plane view in Fig. 2.
  • the shoulder 40 has a saw tooth shaped profile with six teeth, as likewise appears from the plane view of Fig. 2. In the manner shown each of the teeth are arranged in front of its respective one of the plane sides of the hexagonal shoulder 38. Each tooth has furthermore a tooth shoulder 42 facing in the rotational direction.
  • An oval pendulum member 42 is pivotally suspended at one of its ends on a bolt 46 fixedly connected to the plate 8.
  • the bolt 46 is not visible in Fig. 1.
  • the oval pendulum member 44 in front of each leg of the yoke 8 has a projecting abutment 48 and 50, respectively.
  • the abutment 48 has such a length that the longitudinal axis of the pendulum menber 44 extends essentially perpendicularly to the plane of the yoke 8 when the abutment 48 engages the adjacent leg of the yoke 8.
  • the abutment 50 is shorter than the abutment 48 and carries a pressure spring 52 which is tensioned between the side of the pendulum member 44 and the adjacent leg of the yoke 8.
  • the pendulum 44 pivotally carries a crescent shaped blocking member 54.
  • the blocking member 54 is not visible in Fig. 1, but is carried behind the pendulum 44 so that it is located in the plane of the tooth profile 40.
  • the blocking member 54 has a hook end 56 shaped for engagement with the tooth shoulder 42 and an opposite end 58.
  • the blocking member 54 On its inside facing away from the pendulum 44, in the vicinity of the end 58, the blocking member 54 carries a roller 60 in the same plane as the hexagonal profile 38.
  • the roller 60 is resiliently pressed into light engagement with the circumference of the hexagonal profile 38 by means of a draw spring 62 acting between the pendelum 44 and the blocking member 54.
  • the tension of the draw spring 62 is settable by means of a screw- and nut arrangement 64.
  • the plate 8 carries a switch 66 connected in the drive circuit of the lift and having an operating element 68 which breaks the drive circuit at actuation by a shoulder 70 located on the blocking member 54, in a way to be described more closely below.
  • a plate 72 with a V-shaped cut 74 is located in front of the adjacent end 58 of the blocking member 54, said end 58 having a pointed shape complementary to the cut 74.
  • the described catch apparatus operates as follows:
  • the above-mentioned limit velocity at which the catch device shall start work is determined by the tension of the spring 62.
  • the braking time at first hand is decided by the spring force of the spring package 28 by means of which the bowl 18 is pressed against the wheel 16.
  • the invention at first hand consists in the rocking suspension of the blocking member 54 by means of the pendelum 44, which at catching makes possible controlled introduction into the cut 74 and thereby an always fixed locking position for the blocking member 54. As a result also a safe operation of the switch is always obtained.
  • the mentioned advantages have not been obtained in prior apparatus of similar kind where the catch element is fixedly mounted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Warehouses Or Storage Devices (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Transmission Devices (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
EP89200894A 1988-04-22 1989-04-10 Sperrvorrichtung für einen Zahnradaufzug Expired - Lifetime EP0338613B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8801506A SE468089B (sv) 1988-04-22 1988-04-22 Faangapparat foer kuggstaangshiss
SE8801506 1988-04-22

Publications (3)

Publication Number Publication Date
EP0338613A2 true EP0338613A2 (de) 1989-10-25
EP0338613A3 EP0338613A3 (en) 1990-07-25
EP0338613B1 EP0338613B1 (de) 1993-09-01

Family

ID=20372098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89200894A Expired - Lifetime EP0338613B1 (de) 1988-04-22 1989-04-10 Sperrvorrichtung für einen Zahnradaufzug

Country Status (7)

Country Link
EP (1) EP0338613B1 (de)
AU (1) AU609600B2 (de)
DE (1) DE68908758T2 (de)
DK (1) DK193889A (de)
FI (1) FI90755C (de)
NO (1) NO172227C (de)
SE (1) SE468089B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0385180A3 (de) * 1989-03-02 1992-05-20 Maber costruzioni s.r.l. Fangvorrichtung für Aufzüge oder ähnliches

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3850737A4 (de) * 2018-10-23 2022-06-08 Milwaukee Electric Tool Corporation Integrierte mechanische bremse für elektromotor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE697604A (de) * 1966-05-06 1967-10-02
AU406223B2 (en) * 1967-09-29 1970-09-21 T. W. Crommelin & Co. Pty. Ltd Improved safety device for elevators
DE2802681C2 (de) * 1978-01-21 1981-11-26 Thyssen Aufzüge GmbH, 7303 Neuhausen Geschwindigkeitsbegrenzer
DE3644781A1 (de) * 1986-12-23 1988-07-14 Mannesmann Ag Fangbremse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0385180A3 (de) * 1989-03-02 1992-05-20 Maber costruzioni s.r.l. Fangvorrichtung für Aufzüge oder ähnliches

Also Published As

Publication number Publication date
NO172227B (no) 1993-03-15
EP0338613B1 (de) 1993-09-01
EP0338613A3 (en) 1990-07-25
NO891649D0 (no) 1989-04-21
FI90755C (fi) 1994-03-25
AU609600B2 (en) 1991-05-02
DK193889A (da) 1989-10-23
NO172227C (no) 1993-06-23
AU3326489A (en) 1989-10-26
NO891649L (no) 1989-10-23
SE468089B (sv) 1992-11-02
DE68908758T2 (de) 1994-03-24
DK193889D0 (da) 1989-04-20
FI891925A0 (fi) 1989-04-21
SE8801506L (sv) 1989-10-23
FI891925A7 (fi) 1989-10-23
DE68908758D1 (de) 1993-10-07
FI90755B (fi) 1993-12-15
SE8801506D0 (sv) 1988-04-22

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