EP0279144B1 - Safety brake - Google Patents
Safety brake Download PDFInfo
- Publication number
- EP0279144B1 EP0279144B1 EP87730158A EP87730158A EP0279144B1 EP 0279144 B1 EP0279144 B1 EP 0279144B1 EP 87730158 A EP87730158 A EP 87730158A EP 87730158 A EP87730158 A EP 87730158A EP 0279144 B1 EP0279144 B1 EP 0279144B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bore
- base member
- shaft
- bolt
- safety brake
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/32—Detent devices
- B66D5/34—Detent devices having latches
-
- 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
Definitions
- the invention relates to a safety brake for a driven shaft with a brake disc and cam for a roller which can be pressed thereon by a release spring and which, when the speed of the shaft is excessive, causes the locking of a pawl into a toothed ring arranged on the shaft.
- Such a safety brake is known from DE-OS 31 37 523 and enables a damped braking of the shaft when the pawl suddenly engages in the toothed ring, so that damage caused by jerky braking is prevented.
- the use of such a safety brake is particularly appropriate for hoists that are driven by chains.
- an excessive speed can occur for both directions of rotation of the shaft, for which there are still no suitable safety brakes.
- the object of the invention is therefore to provide a safety brake for both directions of rotation.
- the toothed rings are mounted on brake disks, which are connected to one another and to the shaft via tensioning elements and screws and have mutually directed approaches for a common bearing for a base body, which, in addition to a hole for the bearing, also has a hole for a pawl pin and has a bore for a connection bearing of a torque arm.
- This basic body is the actual carrier of the safety brake, which is placed on the shaft and attached with its torque support at a suitable point on a lifting and lowering station or an elevator.
- the mentioned pawl pin has bearing projections for two-armed levers with the pawls on both sides of the main body, and the two-armed levers have projections with bores for release springs, the fixed points of which are pins protruding from the main body.
- each two-armed lever has a shut-off pin for actuating an emergency switch.
- a driven shaft 1 is mounted, which is connected to a drive motor via gearwheels and chains, not shown.
- Two brake disks 2 are fastened on the driven shaft 1 by means of tensioning elements 3 and screws 4.
- Each brake disc 2 is provided for one of the directions of rotation and is surrounded by a toothed ring 5 formed from a plurality of segments, a brake pad 6 with lateral sealing rings 7 being arranged between the latter and the brake disc 2.
- the teeth 5a of the toothed rings 5 are directed in opposite directions.
- a cam 8 for a roller 9 is arranged next to each toothed ring 5. This is mounted on one end of a two-armed lever 10 which has a pawl 11 on the other end and is mounted in a base body 16 via a pin 12.
- both rollers 9 are thrown against the force of release springs 14 by the cams 8, and the pawl 11 effective for the respective direction of rotation engages in a tooth 5a of the toothed ring 5. This is stopped suddenly, and the brake pad 6 causes the brake disc 2 and thus the shaft 1 to brake slowly, so that the load is slowed down slowly.
- the non-effective pawl on the other side slides ineffectively over the teeth and has no possibility of snapping into place.
- the brake disks 2 each have an attachment 2a for a bearing 15, which carries a base body 16 provided with a common cover 17.
- the base body 16 has a bore 16b for a pawl pin 12, a bore 16c for a connection bearing 18 of a torque support 19 which engages at a suitable point on a supporting structure A on which the shaft 1 is also mounted.
- the base body 16 also has a bore 16d for an unlocking pin 20 and a bore 16e for a locking bolt 21 and two bores for pins 26.
- the outer pins 26 are abutments for two release springs 14, of which only the right one is shown.
- Each of the trigger springs 14 engages in a bore 10b of a projection 10a of the two-armed lever 10 and thus presses the roller 9 mounted therein against the edge of the cam plate 8.
- the inner pins 26a each form fixed abutments for one end of a latch spring 27, the other end thereof the release spring 14 counteracts via a spring holder 24, which is arranged together with a spring support 23 by means of screws 22 coaxial to the pawl pin 12.
- a protective plate 25 arranged on each of the screws 22 protects the latch area against unwanted contact.
- the protective plate 25 only projects a shut-off pin 29 mounted in the two-armed lever 10, which, when the roller 9 is thrown away from the cam plate 8 via an emergency switch 30, switches off the system.
- the latch spring 27 and a further spring 28 are present in the spring supports 23 already mentioned, which, via the spring holder 24, interact with a flattening of the unlocking pin 20 and the locking bolt 21, each after the position of its eccentric to adjust.
- a sealed security pin 31 prevents unauthorized rotation of the unlocking pin 20 and the locking bolt 21 with its eccentric 21a.
Description
Die Erfindung betrifft eine Fangbremse für eine angetriebene Welle mit Bremsscheibe und Kurvenscheibe für eine von einer Auslösefeder darauf drückbare Laufrolle, die bei überhöhter Drehzahl der Welle das Einrasten einer Sperrklinke in einen auf der Welle angeordneten Zahnring veranlaßt.The invention relates to a safety brake for a driven shaft with a brake disc and cam for a roller which can be pressed thereon by a release spring and which, when the speed of the shaft is excessive, causes the locking of a pawl into a toothed ring arranged on the shaft.
Eine derartige Fangbremse ist durch die DE-OS 31 37 523 bekannt und ermöglicht beim plötzlichen Einrasten der Sperrklinke in den Zahnring ein gedämpftes Abbremsen der Welle, so daß Schäden durch ruckartiges Bremsen verhindert werden. Die Verwendung einer solchen Fangbremse ist vor allem bei Hebezeugen angebracht, die über Ketten angetrieben werden. Wenn sie jedoch, wie bei Aufzügen und Hub- und Senkstationen innerhalb Förderanlagen mit Hängebahnen oder Rollenförderbahnen, mit Gegengewichten versehen sind, kann für beide Drehrichtungen der Welle eine überhöhte Geschwindigkeit eintreten, für die es noch keine geeigneten Fangbremsen gibt.Such a safety brake is known from DE-OS 31 37 523 and enables a damped braking of the shaft when the pawl suddenly engages in the toothed ring, so that damage caused by jerky braking is prevented. The use of such a safety brake is particularly appropriate for hoists that are driven by chains. However, if, as with elevators and lifting and lowering stations within conveyor systems with overhead conveyors or roller conveyor conveyors, they are provided with counterweights, an excessive speed can occur for both directions of rotation of the shaft, for which there are still no suitable safety brakes.
Aufgabe der Erfindung ist es daher, eine Fangbremse für beide Drehrichtungen zu schaffen.The object of the invention is therefore to provide a safety brake for both directions of rotation.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß auf der Welle zwei Zahnringe mit entgegengerichteter Sperrwirkung der Zähne, diesen jeweils zugeordnete Kurvenscheiben sowie ein Grundkörper mit einem Sperrklinkenbolzen für entgegengesetzt gerichtete Sperrklinken angeordnet sind, für deren gleichzeitiges Einrasten und Lösen im Grundkörper ein Entriegelungsstift und ein Verriegelungsbolzen gelagert sind, wobei der Grundkörper in Nähe der Bohrung für den Sperrklinkenbolzen eine Bohrung für den drehbaren Entriegelungsstift sowie eine Bohrung für den Verriegelungsbolzen mit Exzenter hat und je nach Stellung des Exzenters der Entriegelungsstift bzw. der Verriegelungsbolzen in die Sperrstellung bzw. aus der Sperrstellung gelangt und wobei ferner koaxial zum Sperrklinkenbolzen bzw. seinen Lageransätzen auf beiden Seiten ein Federträger angeordnet ist und daß beim gleichzeitigen Einrasten und Lösen der Sperrklinken darin gelagerte Federn über Federhalter und Exzenter den drehbaren Entriegelungsstift und den Verriegelungsbolzen halten.This object is achieved in that two toothed rings with opposing locking action of the teeth, cam plates respectively assigned to them and a base body with a pawl pin for oppositely directed pawls are arranged on the shaft, an unlocking pin and a locking bolt are mounted in the base body for their simultaneous engagement and release are, the base body near the hole for the pawl pin has a hole for the rotatable unlocking pin and a hole for the locking pin with eccentric and, depending on the position of the eccentric, the unlocking pin or the locking pin moves into the locked position or from the locked position and where furthermore, a spring support is arranged coaxially to the pawl bolt or its bearing attachments on both sides and that, while simultaneously locking and releasing the pawls, springs supported therein via spring retainers and eccentric d Hold the rotatable unlocking pin and the locking bolt.
In weiterer Ausgestaltung der Erfindung sind die Zahnringe auf Bremsscheiben gelagert, die über Spannelemente und Schrauben miteinander und mit der Welle verbunden sind und zueinander gerichtete Ansätze für ein gemeinsames Lager für einen Grundkörper haben, der außer einer Bohrung für das Lager auch eine Bohrung für einen Sperrklinkenbolzen und eine Bohrung für ein Anschlußlager einer Momentenstütze hat. Dieser Grundkörper ist der eigentliche Träger der Fangbremse, die auf die Welle gesteckt und mit ihrer Momentenstütze an geeigneter Stelle einer Hub- und Senkstation bzw. eines Aufzuges angebracht wird.In a further embodiment of the invention, the toothed rings are mounted on brake disks, which are connected to one another and to the shaft via tensioning elements and screws and have mutually directed approaches for a common bearing for a base body, which, in addition to a hole for the bearing, also has a hole for a pawl pin and has a bore for a connection bearing of a torque arm. This basic body is the actual carrier of the safety brake, which is placed on the shaft and attached with its torque support at a suitable point on a lifting and lowering station or an elevator.
Der genannte Sperrklinkenbolzen hat in weiterer Ausgestaltung der Erfindung auf beiden Seiten des Grundkörpers Lageransätze für zweiarmige Hebel mit den Sperrklinken, und die zweiarmigen Hebel haben Vorsprünge mit Bohrungen für Auslösefedern, deren Festpunkte aus dem Grundkörper herausragende Stifte sind. Außerdem hat jeder zweiarmige Hebel einen Abschaltstift zur Betätigung eines Notschalters.In a further embodiment of the invention, the mentioned pawl pin has bearing projections for two-armed levers with the pawls on both sides of the main body, and the two-armed levers have projections with bores for release springs, the fixed points of which are pins protruding from the main body. In addition, each two-armed lever has a shut-off pin for actuating an emergency switch.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und im folgenden erläutert. Es zeigen:
- Fig. 1
- eine Fangbremse in der Seitenansicht,
- Fig. 2
- einen Längsschnitt durch Fig. 1,
- Fig. 3
- die Ansicht der Fangbremse aus der Richtung X aus aus Fig. 2.
- Fig. 1
- a side view of a safety brake,
- Fig. 2
- 2 shows a longitudinal section through FIG. 1,
- Fig. 3
- the view of the safety brake from the direction X from Fig. 2nd
An einer nicht gezeichneten Hub- und Senkstation ist eine angetriebene Welle 1 gelagert, die über nicht gezeichnete Zahnräder und Ketten mit einem Antriebsmotor verbunden ist. Auf der angetriebenen Welle 1 sind zwei Bremsscheiben 2 mittels Spannelementen 3 und Schrauben 4 befestigt. Jede Bremsscheibe 2 ist für eine der Drehrichtungen vorhanden und von einem aus mehreren Segmenten gebildeten Zahnring 5 umgeben, wobei zwischen diesem und der Bremsscheibe 2 ein Bremsbelag 6 mit seitlichen Dichtungsringen 7 angeordnet ist. Die Zähne 5a der Zahnringe 5 sind entgegengesetzt gerichtet. Neben jedem Zahnring 5 ist eine Kurvenscheibe 8 für eine Laufrolle 9 angeordnet. Diese ist auf einem Ende eines zweiarmigen Hebels 10 gelagert, der auf dem anderen Ende eine Sperrklinke 11 hat und über einen Bolzen 12 in einem Grundkörper 16 gelagert ist.At a lifting and lowering station, not shown, a driven shaft 1 is mounted, which is connected to a drive motor via gearwheels and chains, not shown. Two
Beim Überschreiten einer vorgegebenen Drehzahl der Welle 1 werden beide Laufrollen 9 entgegen der Kraft von Auslösefedern 14 von den Kurvenscheiben 8 weggeschleudert, und die für die jeweilige Drehrichtung wirksame Sperrklinke 11 rastet in einen Zahn 5a des Zahnringes 5 ein. Dieser wird schlagartig angehalten, und der Bremsbelag 6 bewirkt ein langsames Bremsen der Bremsscheibe 2 und damit der Welle 1, so daß die Last langsam gebremst wird. Die nicht wirksame Sperrklinke der anderen Seite gleitet wirkungslos über die Zähne und hat keine Möglichkeit zum Einrasten.When a predetermined speed of the shaft 1 is exceeded, both
Die Bremsscheiben 2 haben, wie in Fig. 2 zu erkenne, je einen Ansatz 2a für ein Lager 15, das einen it einer gemeinsamen Abdeckung 17 versehenen Grundkörper 16 trägt. Der Grundkörper 16 hat außer der Bohrung 16a für das Lager 15 eine Bohrung 16b für einen Sperrklinkenbolzen 12, eine Bohrung 16c für ein Anschlußlager 18 einer Momentenstütze 19, die an geeigneter Stelle einer Tragkonstruktion A angreift, an der auch die Welle 1 gelagert ist. Der Grundkörper 16 hat außerdem eine Bohrung 16d für einen Entriegelungsstift 20 und eine Bohrung 16e für einen Verriegelungsbolzen 21 sowie je zwei Bohrungen für Stifte 26. Die äußeren Stifte 26 sind Widerlager für zwei Auslösefedern 14, von denen nur die rechte gezeichnet ist. Jede der Auslösefedern 14 greift in eine Bohrung 10b eines Vorsprunges 10a des Zweiarmigen Hebels 10 ein und drückt so die darin gelagerte Laufrolle 9 gegen den Rand der Kurvenscheibe 8. Die inneren Stifte 26a bilden je feste Widerlager für ein Ende einer Fallenfeder 27, deren anderes Ende der Auslösefeder 14 über einen Federhalter 24 entgegenwirkt, der zusammen mit einem Federträger 23 mittels Schrauben 22 koaxial zum Sperrklinkenbolzen 12 angeordnet ist. Eine auf jeder der Schrauben 22 angeordnete Schutzplatte 25 schützt den Klinkenbereich vor ungewollter Berührung.As can be seen in FIG. 2, the
Durch die Schutzplatte 25 ragt lediglich ein im zweiarmigen Hebel 10 gelagerter Abschaltstift 29, der beim Wegschleudern der Laufrolle 9 von der Kurvenscheibe 8 über einen Notschalter 30 das Abschalten der Anlage bewirkt.The
Zum bewußten Ein- und Ausrasten der Sperrklinken 11 aus dem Zahnring 5 sind in den bereits erwähnten Federträgern 23 jeweils die Fallenfeder 27 und eine weitere Feder 28 vorhanden, die über den Federhalter 24 im Zusammenwirken mit einer Abflachung des Entriegelungsstiftes 20 und dem Verriegelungsbolzen 21, je nach deren Stellung seines Exzenters das Verstellen bewirken. Ein plombierter Sicherheitsstift 31 verhindert unbefugtes Verdrehen des Entriegelungsstiftes 20 und des Verriegelungsbolzens 21 mit seinem Exzenter 21a.For deliberate engagement and disengagement of the
Claims (5)
- A safety brake for a driven shaft with brake disc and cam disc for a roller which can be pressed thereon by a tripping spring, which roller causes a detent pawl to engage in a toothed ring located on the shaft in the event of an excessive speed of rotation of the shaft, characterised in that
two toothed rings (5) having blocking effects of the teeth (5a) which act in opposite directions, cam discs (8) associated therewith in each case and also a base member (16) with a detent pawl bolt (12) for detent pawls (11) which act in opposite directions are located on the shaft (1), for the simultaneous engagement and disengagement of which an unlocking pin (20) and a locking bolt (21) are mounted in the base member (16), the base member (16) having a bore (16d) for the rotatable unlocking pin (20) and also a bore (16e) for the locking bolt (21) with eccentric in the vicinity of the bore (16b) for the detent pawl bolt (12), and depending on the position of the eccentric the unlocking pin (20) or the locking bolt moves into the locking position or out of the locking position respectively, and furthermore a spring support (23) is located coaxially to the detent pawl bolt (12) or the bearing shoulders (13) thereof on both sides, and that upon the simultaneous engagement and disengagement of the detent pawls (11) springs (27, 28) mounted therein hold the rotatable unlocking pin (20) and the locking bolt (21) by means of spring retainer (24) and eccentric (20a). - A safety brake according to Claim 1, characterised in that the toothed rings (5) are mounted on brake discs (2) which are connected together and to the shaft (1) by means of clamping elements (3) and screws (4) and have shoulders (2a) facing one another for a common bearing (15) for the base member (16), which in addition to a bore (16a) for the bearing (15) also has a bore (16b) for a detent pawl bolt (12) and a bore (16c) for a connection bearing (18) of a torque support (19).
- A safety brake according to Claim 2, characterised in that the detent pawl bolt (12) has bearing shoulders (13) for two-armed levers (10) with the detent pawls (11) on both sides of the base member (16).
- A safety brake according to Claim 3, characterised in that the two-armed levers (10) have projections (10a) with bores (10b) for tripping springs (14), the fixed points of which are pins (26) which project out of the base member (16).
- A safety brake according to one or more of the preceding Claims, characterised in that each two-armed lever (10) has a switch-off pin (29) for actuating an emergency switch (30).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19863644781 DE3644781A1 (en) | 1986-12-23 | 1986-12-23 | FAN BRAKE |
| DE3644781 | 1986-12-23 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0279144A2 EP0279144A2 (en) | 1988-08-24 |
| EP0279144A3 EP0279144A3 (en) | 1989-12-13 |
| EP0279144B1 true EP0279144B1 (en) | 1992-10-14 |
Family
ID=6317415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87730158A Expired - Lifetime EP0279144B1 (en) | 1986-12-23 | 1987-12-01 | Safety brake |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0279144B1 (en) |
| DE (2) | DE3644781A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021013286A1 (en) | 2019-07-24 | 2021-01-28 | Columbus Mckinnon Industrial Products Gmbh | Lifting gear |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE468089B (en) * | 1988-04-22 | 1992-11-02 | Alimak Ab | DEVICE FOR SEARCH LIFT |
| US5065845A (en) * | 1990-09-13 | 1991-11-19 | Pearson David B | Speed governor safety device for stopping an elevator car |
| GB2264283B (en) * | 1992-02-21 | 1995-02-15 | Sunrise Medical Ltd | Overspeed governor of a stairlift and method of operating the stairlift |
| US5458318A (en) * | 1993-10-15 | 1995-10-17 | Kci Konecranes International Corporation | Drum brake |
| DE102010009357B4 (en) * | 2010-02-25 | 2012-02-16 | Konecranes Plc | Cable with emergency braking device |
| CN103318766B (en) * | 2012-09-24 | 2015-01-21 | 上海振华重工(集团)股份有限公司 | Electric guide plate and torque protection device thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3729071A (en) * | 1971-04-08 | 1973-04-24 | Humphrey Elevator & Truck Co | Combined overspeed safety brake and reverse holdback mechanism for elevators |
| US3768609A (en) * | 1972-07-24 | 1973-10-30 | Humphrey Elevator Truck Co | Lock device for elevator safety brake |
| FR2332220A1 (en) * | 1975-11-24 | 1977-06-17 | Holler Armand | Lift and hoist safety device - has brake shoe assembly secured together by screwed rods with release lever |
| DE2737433A1 (en) * | 1977-08-19 | 1979-03-01 | Pierre Marcel David | Lift car safety braking device - has journalled shaft, drive wheel fixed and movable discs and centrifugal element |
| DE2753079A1 (en) * | 1977-11-29 | 1979-05-31 | Elba Werk Maschinen Gmbh & Co | CATCHING DEVICE FOR ELEVATORS, IN PARTICULAR SUCH WITH RACK DRIVE |
| DE3137523A1 (en) * | 1981-09-22 | 1983-04-28 | Mannesmann AG, 4000 Düsseldorf | SAFETY DEVICE FOR A LIFT |
-
1986
- 1986-12-23 DE DE19863644781 patent/DE3644781A1/en active Granted
-
1987
- 1987-12-01 EP EP87730158A patent/EP0279144B1/en not_active Expired - Lifetime
- 1987-12-01 DE DE8787730158T patent/DE3782241D1/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021013286A1 (en) | 2019-07-24 | 2021-01-28 | Columbus Mckinnon Industrial Products Gmbh | Lifting gear |
| WO2021013285A1 (en) | 2019-07-24 | 2021-01-28 | Columbus Mckinnon Industrial Products Gmbh | Lifting gear |
| US20220242704A1 (en) * | 2019-07-24 | 2022-08-04 | Columbus Mckinnon Industrial Products Gmbh | Lifting gear |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0279144A3 (en) | 1989-12-13 |
| DE3644781C2 (en) | 1990-04-26 |
| EP0279144A2 (en) | 1988-08-24 |
| DE3782241D1 (en) | 1992-11-19 |
| DE3644781A1 (en) | 1988-07-14 |
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