GB593333A - Improvements in magnetic brakes - Google Patents

Improvements in magnetic brakes

Info

Publication number
GB593333A
GB593333A GB1517445A GB1517445A GB593333A GB 593333 A GB593333 A GB 593333A GB 1517445 A GB1517445 A GB 1517445A GB 1517445 A GB1517445 A GB 1517445A GB 593333 A GB593333 A GB 593333A
Authority
GB
United Kingdom
Prior art keywords
air gap
shaft
brake
rotation
members
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
Application number
GB1517445A
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.)
PREC DEVELOPMENTS CO Ltd
Original Assignee
PREC DEVELOPMENTS CO Ltd
Filing date
Publication date
Application filed by PREC DEVELOPMENTS CO Ltd filed Critical PREC DEVELOPMENTS CO Ltd
Publication of GB593333A publication Critical patent/GB593333A/en
Expired 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
    • F16D65/00—Parts or details
    • F16D65/38—Slack adjusters
    • F16D65/40—Slack adjusters mechanical
    • F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
    • F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/748—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on electro-magnetic brakes
    • 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
    • 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
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/03—Mechanisms with latches or braking devices in general for capstans, hoists or similar devices as well as braking devices actuated electrically or by fluid under pressure
    • 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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/024—Braking members; Mounting thereof the braking surface being inclined with respect to the rotor's axis of rotation at an angle other than 90 degrees, e.g. comprising a conical rotor
    • 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)
  • Transportation (AREA)
  • Braking Arrangements (AREA)

Abstract

593,333. Brakes. PRECISION DEVELOPMENTS CO., Ltd., and OLAH, G. June 14, 1945, No. 15174. [Class 103 (i)] In a magnetic friction brake, the operative air gap is automatically restored to its original value after a predetermined amount of wear has taken place. As shown, braking is effected frictionally between a rotary member 3 and a normally stationary member 7, the member 3 being integral with a sleeve 34 on the motor shaft 4 and secured by rivets 5 to an armature 6 separated by an air gap 8 from an electromagnet having coils 2. A spring 3a tends to disengage the brake. The member 7 is secured by pins 18 to a member 9 carried by a shaft 10 which is threaded into a nut 12 on the backplate of the housing 1. The member 7 is normally held against rotation by pawls 14 engaging an internally ratchet-toothed surface 13 of the member 9. The pawls 14 are spring-loaded and are so formed that whilst rotation of the members 7, 9 is prevented in the direction which, by virtue of the screw-mounting 11, 12, diminishes the air gap 8; rotation is permitted in the other direction when the brake becomes too fierce owing to the lessening of the air gap through wear of the members 3, 7. The permitted rotation of the members 7, 9 thus increases the air gap to its original value. In a modification, the sleeve 34 engages with a bellcrank lever carrying a pawl which works over teeth on a ratchet face on a gear wheel meshed with a wheel on a screw shaft corresponding to the shaft 10. When wear exceeds a certain value, the pawl rides over one tooth and, on release of the brake, the shaft 10 is correspondingly rotated.
GB1517445A 1945-06-14 Improvements in magnetic brakes Expired GB593333A (en)

Publications (1)

Publication Number Publication Date
GB593333A true GB593333A (en) 1947-10-14

Family

ID=1731314

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1517445A Expired GB593333A (en) 1945-06-14 Improvements in magnetic brakes

Country Status (1)

Country Link
GB (1) GB593333A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111981061A (en) * 2020-08-24 2020-11-24 浙江英洛华赫兹电气有限公司 Electromagnetic power-off brake with high braking torque
CN112963471A (en) * 2021-03-05 2021-06-15 宁波市凹凸重工有限公司 Horizontal wheel-side brake for gantry crane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111981061A (en) * 2020-08-24 2020-11-24 浙江英洛华赫兹电气有限公司 Electromagnetic power-off brake with high braking torque
CN112963471A (en) * 2021-03-05 2021-06-15 宁波市凹凸重工有限公司 Horizontal wheel-side brake for gantry crane
CN112963471B (en) * 2021-03-05 2022-06-28 宁波市凹凸重工有限公司 Horizontal wheel brake for gantry crane

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