GB2302574A - Electrically operated brake - Google Patents

Electrically operated brake Download PDF

Info

Publication number
GB2302574A
GB2302574A GB9608218A GB9608218A GB2302574A GB 2302574 A GB2302574 A GB 2302574A GB 9608218 A GB9608218 A GB 9608218A GB 9608218 A GB9608218 A GB 9608218A GB 2302574 A GB2302574 A GB 2302574A
Authority
GB
United Kingdom
Prior art keywords
brake
terminal box
switch
housing
pin
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
GB9608218A
Other versions
GB9608218D0 (en
GB2302574B (en
Inventor
Karl Eiband
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.)
Chr Mayr GmbH and Co KG
Original Assignee
Chr Mayr GmbH and Co KG
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 Chr Mayr GmbH and Co KG filed Critical Chr Mayr GmbH and Co KG
Publication of GB9608218D0 publication Critical patent/GB9608218D0/en
Publication of GB2302574A publication Critical patent/GB2302574A/en
Application granted granted Critical
Publication of GB2302574B publication Critical patent/GB2302574B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
    • F16D59/02—Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
    • F16D55/26—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
    • F16D55/28—Brakes with only one rotating disc
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D66/02—Apparatus for indicating wear
    • F16D66/021—Apparatus for indicating wear using electrical detection or indication means
    • F16D66/022—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D66/02—Apparatus for indicating wear
    • F16D66/021—Apparatus for indicating wear using electrical detection or indication means
    • F16D66/022—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness
    • F16D66/023—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness directly sensing the position of braking members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0058—Fully lined, i.e. braking surface extending over the entire disc circumference
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/20—Electric or magnetic using electromagnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/20—Electric or magnetic using electromagnets
    • F16D2121/22—Electric or magnetic using electromagnets for releasing a normally applied brake

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Braking Arrangements (AREA)

Abstract

An electrically operated brake, preferably a friction brake, comprises a housing 3 and an integral terminal box 11 for introducing electrical conductors to the brake. A switch 8 for controlling a ventilation device is located in the terminal box and is operated by a pin 7 mounted in the armature 2. Fasteners 13 for securing a cover 11A are located radially outwardly of an annular seal 12.

Description

ELECTRICALLY OPERABLE BRAKE The invention relates to an electrically operable brake and particularly to a friction brake comprising a housing and a terminal box for attaching the electrical conductors to the brake.
A brake of this type is known from the publications entitled "ROBA-stop Elektromagnetische Sicherheitsbremse, Katalog Nr. 111/2" and "ROBATIK Kupplungsaggregate Katalog Nr. 105/3" both published by the Applicant of the present invention.
In these prior brakes, the terminal box is separately attached to the coil support or to the brake housing, with the electrical conductors - assembled to form a cable taken out off the housing and introduced into the terminal box. Also attached to the brake are an air control device and a wear monitoring device in the form of a switch. This switch, too, is attached separately to the housing. The switch is protected by a strap surrounding it.
This structure is complicated and requires much space; it also creates the danger of the cable and the switch being damaged by external mechanical attack. Also, it is easy for unauthorised persons to gain access to the switch to change its adjustment, to tamper with it and even to cause damage.
Where brakes of this type are used in locations exposed to seawater, there exists the danger of the seawater, which is chemically aggressive, penetrating the many seals on the structure, thus impairing the brake's functions and reducing its service life. For this reason, it was impossible for these brakes to obtain a higher safety rating.
An object of the present invention is to provide a brake of a kind outlined above which is simple in construction, needs little space and offers enhanced operational safety and life while it eliminates the drawbacks detailed above.
According to the present invention there is provided an electrically operable brake comprising a housing and a terminal box for feeding the electrical conductors to the brake, wherein the terminal box is located in the housing.
In one preferred embodiment of an electrically operable brake in accordance with the present invention the terminal box is preferably integral with the housing of the brake. Conveniently the terminal box is a recess in the housing of the brake, and may serve to house a switch therein. A rectifier for the brake may also be located within the terminal box.
The terminal box is conveniently closed by a cover which can have a seal located in the cover for sealing the cover against the housing. The cover is preferably secured in place on the terminal box by thread fasteners which can be located exteriorly of the annular seal.
Preferably, a pin is provided in the armature disc so that when the armature disc is attracted by the electromagnetic coil the pin is engageable against switch conveniently to effect ventilation control. Alternatively, or additionally, such movement may be used to implement linear wear monitoring.
Therefore, there has been disclosed a terminal box in which all electrical connecting conductors are located within the brake.
An embodiment of the present invention will now be described by way of example with reference to the accompanying drawings, in which: Fig. 1 shows an axial cross-section view of a friction brake, and Fig. 2 shows a plan view of a single sealing surface.
One embodiment of an electrical brake in accordance with the present invention is shown in cross-section in Figure 1 to have an electromagnetic coil 1 having an armature disc 2 located within a housing 3. A rotor 4 is mounted on a hub 5 for rotation about a central axis 5a.
Brake linings 4a are located on opposite sides of the rotor 4 towards the radially outermost edge of the rotor.
Helical compression springs 6 are spaced around the armature disc 2 and are effective to urge the armature disc 2 against the brake linings 4a and hence lock the rotor 4 relative to the housing 3.
The armature disc 2 is also provided towards its external peripheral edge with a pin 7 mounted in the armature disc 2. The pin 7 is movable in an axial direction of the brake with the armature disc 2. The pin 7 is engageable with a switch 8 which is used as a ventilation control device.
The switch 8 is located in a terminal box 11 within the housing 3 and an adjusting mechanism 9 is also provided within the terminal box 11 to adjust the relative position between the pin 7 and the switch 8 by effecting adequate control over the ventilation control device.
The terminal box 11 in the housing 3 is closed by a cover ila having an annular seal 12 for sealing the cover relative to the housing 3. The cover lia is secured in place on the housing by threaded fasteners 13 located exteriorally of the cover 11a and seal 12. Such a seal arrangement is shown in Figure 2 where the seal is an annular seal and the fasteners are located radially externally of the seal.
The electrical brake is on in the non-energised state of the electromagnetic coil 1 because the compression springs 6 force the armature disc 2 against the brake linings 4a thereby clamping the rotor 4 between the armature disc 2 and the housing 3.
When the electromagnetic coil 1 is energised it attracts the armature disc 2 against the force of the springs 6 and releases the rotor 4 for free rotation on the hub 5.
As the armature disc 2 moves axially away from the rotor 4 pin 7 engages the switch 8 and turns on the ventilation control device.
In the embodiment described above the helical compression springs may take the form of any well known spring arrangement.
The adjustment mechanism 9 for adjusting switch 8 may take the form of a mechanical rotational or sliding adjustment or alternatively the adjustment may be electrically controlled.

Claims (15)

CLAIMS:
1. An electrically operated brake comprising a housing and a terminal box for feeding in electrical conductors to the brake wherein the terminal box is located in the housing.
2. A brake as claimed in claim 1, wherein the terminal box is integral with the housing of the brake.
3. A brake as claimed in claim 1 or 2, wherein the terminal box is a recess in the housing of the brake.
4. A brake as claimed in any one of the preceding claims, wherein the terminal box houses a switch therein.
5. A brake as claimed in claim 4, comprising an adjustment mechanism in the terminal box for adjustment of the switch.
6. A brake as claimed in any one of the preceding claims, comprising a rectifier located in the terminal box.
7. A brake as claimed in any one of the preceding claims, wherein the terminal box is closed by a cover.
8. A brake claimed in claim 8, wherein the cover is sealed relative to the terminal box.
9. A brake as claimed in claim 8 or 9, wherein the cover is secured in place on the terminal box by threaded fasteners.
10. A brake as claimed in claim 9, comprising fasteners located exteriorly of annular seal.
11. A brake as claimed in any one of the preceding claims, comprising an armature disc which is arranged to be urged towards a switch as the armature disc biased against brake pads of the brake and which is energised and moves away from the brake pads, a pin on the armature disk being engageable with the switch to operate the switch in the energised condition of the armature disc.
12. A brake as in claim 11, wherein the pin is movable to implement ventilation control.
13. A brake as claimed in claim 11, wherein the pin is movable for monitoring liner wear.
14. A brake as claimed in any one of the preceding claims, wherein all electrical connecting conductors are located within the brake.
15. A brake substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawings.
15. A brake as claimed in any one of the preceding claims wherein the brake is a friction brake.
16. A brake substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawings.
Amendments to the claims have been filed as follows 1. An electrically operated brake comprising a housing and a terminal box for feeding in electrical conductors to the brake wherein the terminal box is located in the housing.
2. A brake as claimed in claim 1, wherein the terminal box is integral with the housing of the brake.
3. A brake as claimed in claim 1, wherein the terminal box is a recess in the housing of the brake.
4. A brake as claimed in any one of the preceding claims, comprising an adjustment mechanism in the terminal box for adjustment of the switch.
5. A brake as claimed in any one of the preceding claims, comprising a rectifier located in the terminal box.
6. A brake as claimed in any one of the preceding claims, wherein the terminal box is closed by a cover.
7. A brake claimed in claim 6, wherein the cover is sealed relative to the terminal box.
8. A brake as claimed in claim 6 or 7, wherein the cover is secured in place on the terminal box by threaded fasteners.
9. A brake as claimed in claim 8, comprising fasteners located exteriorly of annular seal.
10. A brake as claimed in any one of the preceding claims, comprising an armature disc which is arranged to be urged towards a switch as the armature disc is biased against brake pads of the brake and which is energised and moves away from the brake pads, a pin on the armature disk being engageable with the switch to operate the switch in the energised condition of the armature disc.
11. A brake as in claim 10, wherein the pin is movable to implement ventilation control.
12. A brake as claimed in claim 10, wherein the pin is movable for monitoring liner wear.
13. A brake as claimed in any one of the preceding claims, wherein all electrical connecting conductors are located within the brake.
14. A brake as claimed in any one of the preceding claims wherein the brake is a friction brake.
GB9608218A 1995-06-23 1996-04-19 Electrically operated brake Expired - Lifetime GB2302574B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE29510246U DE29510246U1 (en) 1995-06-23 1995-06-23 Electrically operated brake, in particular friction brake

Publications (3)

Publication Number Publication Date
GB9608218D0 GB9608218D0 (en) 1996-06-26
GB2302574A true GB2302574A (en) 1997-01-22
GB2302574B GB2302574B (en) 1999-06-16

Family

ID=8009696

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9608218A Expired - Lifetime GB2302574B (en) 1995-06-23 1996-04-19 Electrically operated brake

Country Status (3)

Country Link
KR (1) KR970002022A (en)
DE (1) DE29510246U1 (en)
GB (1) GB2302574B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000031432A1 (en) * 1998-11-20 2000-06-02 Pintsch Bamag Antriebs- Und Verkehrstechnik Gmbh Brake with adjustable play
WO2000031431A1 (en) * 1998-11-20 2000-06-02 Pintsch Bamag Antriebs- Und Verkehrstechnik Gmbh Watertight brake
DE10103736A1 (en) * 2001-01-26 2002-08-29 Lenze Gmbh & Co Kg Aerzen Electromagnetic spring action brake for servomotor, has brake rotor pressable against counter bearing flange
US9441692B2 (en) 2008-03-11 2016-09-13 Honeywell International Inc. Proximity sensor for brake wear detection
US9482301B2 (en) 2015-03-25 2016-11-01 Honeywell International Inc. Brake disc stack wear measurement
US10471947B1 (en) 2018-04-27 2019-11-12 Honeywell International Inc. Determining estimated remaining use of brake assembly by transceiver
US10941826B2 (en) 2018-09-12 2021-03-09 Honeywell International Inc. Determining estimated remaining use of brake assembly

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100446915B1 (en) * 2001-09-04 2004-09-01 권영춘 An article of glass's manufacturing technique for use of furnace
DE102006004065A1 (en) * 2006-01-28 2007-08-02 Jungheinrich Ag Spring storage brake for fork lift truck has proximity switch and initiator for monitoring operational position of brake
DE102006009876B3 (en) * 2006-03-03 2007-10-18 Kendrion Binder Magnete Gmbh Electromagnetically opening spring-loaded brake with a ventilation device and a microswitch
DE202011005655U1 (en) * 2011-04-28 2011-07-13 Chr. Mayr Gmbh & Co. Kg Improved switching state monitoring for spring-applied brakes
EP2962008B1 (en) 2013-03-01 2018-09-05 SEW-EURODRIVE GmbH & Co. KG Electromagnetically actuatable spring-pressure brake
DE202015106367U1 (en) * 2015-11-23 2017-02-24 Chr. Mayr Gmbh + Co Kg Electromagnetically releasing spring-loaded brake in the form of a multi-circuit triangular brake
PL233925B1 (en) * 2017-10-31 2019-12-31 Fae Ema Elfa Spólka Z Ograniczona Odpowiedzialnoscia Explosion-proof electromagnetic brake
KR102605207B1 (en) * 2023-06-05 2023-11-24 이재훈 Manufacturing method of artificial gem using waste glass

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB561776A (en) * 1941-11-28 1944-06-05 Igranic Electric Co Ltd Improvement in electromagnetic brakes
FR2456883A1 (en) * 1979-05-17 1980-12-12 Leroy Somer Moteurs ELECTRIC BRAKE MOTOR
US4821847A (en) * 1987-12-29 1989-04-18 Force Control Industries, Inc. Liquid cooled brake unit
US5250921A (en) * 1990-10-19 1993-10-05 Dana Corporation Field assembly for an electromagnet

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000031432A1 (en) * 1998-11-20 2000-06-02 Pintsch Bamag Antriebs- Und Verkehrstechnik Gmbh Brake with adjustable play
WO2000031431A1 (en) * 1998-11-20 2000-06-02 Pintsch Bamag Antriebs- Und Verkehrstechnik Gmbh Watertight brake
US6536563B1 (en) 1998-11-20 2003-03-25 Pintsch Bamag Antriebs-Und Verkehrstechnik Gmbh Brake with adjustable play
DE10103736A1 (en) * 2001-01-26 2002-08-29 Lenze Gmbh & Co Kg Aerzen Electromagnetic spring action brake for servomotor, has brake rotor pressable against counter bearing flange
DE10103736C2 (en) * 2001-01-26 2003-05-08 Lenze Drive Systems Gmbh Electromagnetically ventilated spring-applied brake with a brake rotor that can be pressed against an abutment flange
US9441692B2 (en) 2008-03-11 2016-09-13 Honeywell International Inc. Proximity sensor for brake wear detection
US9482301B2 (en) 2015-03-25 2016-11-01 Honeywell International Inc. Brake disc stack wear measurement
US10471947B1 (en) 2018-04-27 2019-11-12 Honeywell International Inc. Determining estimated remaining use of brake assembly by transceiver
US10941826B2 (en) 2018-09-12 2021-03-09 Honeywell International Inc. Determining estimated remaining use of brake assembly

Also Published As

Publication number Publication date
DE29510246U1 (en) 1995-08-24
GB9608218D0 (en) 1996-06-26
GB2302574B (en) 1999-06-16
KR970002022A (en) 1997-01-24

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