US2685043A - Brake for electric motors - Google Patents

Brake for electric motors Download PDF

Info

Publication number
US2685043A
US2685043A US278080A US27808052A US2685043A US 2685043 A US2685043 A US 2685043A US 278080 A US278080 A US 278080A US 27808052 A US27808052 A US 27808052A US 2685043 A US2685043 A US 2685043A
Authority
US
United States
Prior art keywords
rotor
stator
gear
brake
respect
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
Application number
US278080A
Inventor
Lyndon A Durant
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.)
General Patent Corp
Original Assignee
General Patent Corp
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 General Patent Corp filed Critical General Patent Corp
Priority to US278080A priority Critical patent/US2685043A/en
Application granted granted Critical
Publication of US2685043A publication Critical patent/US2685043A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/12—Structural association with clutches, brakes, gears, pulleys or mechanical starters with auxiliary limited movement of stators, rotors or core parts, e.g. rotors axially movable for the purpose of clutching or braking
    • H02K7/125—Structural association with clutches, brakes, gears, pulleys or mechanical starters with auxiliary limited movement of stators, rotors or core parts, e.g. rotors axially movable for the purpose of clutching or braking magnetically influenced

Definitions

  • This invention relates to certain new and useful improvements in motor-driven gears and has as an object the provision of an improved construction of the character hereinafter described which will be highly efficient in use and economical in manufacture.
  • the present invention constitutes an improvement over that shown in application of Leo Galinslri for United States Letters Patent, Serial No. 278,079, filed on even date hereof.
  • the present invention relates to a simple and efficient arrangement for braking the rotation of the rotor of an electric motor and thereby preventing overriding of such rotor by its own inertia.
  • Fig. 1 is a perspective view of a motor embodying my invention
  • Fig. 2 is an elevational view of one side of the motor
  • Fig. 3 is a bottom view showing the rotor attracted to its normal operative position with respect to the stator
  • Fig. 4 is an enlarged sectional detail view taken substantially on line 4-4 of Fig. 3; W
  • Fig. 5 is a sectional detail view taken substantially on line 55 of Fig. l;
  • Fig. 6 is a view of a disc member embodied in the invention, looking in the direction of line 6-6 of Fig. 4;
  • Fig. 7 is an end view of the driving gear embodied in the invention.
  • Fig. 8 is an enlarged elevational View of the driven gear embodied in the invention.
  • Fig. 9 is a sectional View similar to Fig. 4 but showing a construction in which the driving gear embodied in the invention remains at all times in driving engagement with a driven gear.
  • a mounting plate is indicated at H).
  • the motor I l is mounted to a fixed support.
  • This mounting plate I0 is hollow in construction to provide an enclosure for a train of gears I 2 including a driven gear it, an intermediate gear 14, and a pinion I5, the latter mounted on a work shaft 16.
  • the intermediate gear is operativel connected to the driven gear by a pinion l3.
  • the motor I l comprises a stator I! and a rotor H3.
  • the rotor I8 is mounted on a shaft l9.
  • Such shaft 19 together with its rotor is normally projected laterally with respect to the stator IT by means of a spring 23 arranged between the rotor 18 and the adjacent wall 21 of the mounting plate H) and mounted to embrace a sleeve 22 fixed to the wall 2
  • This rotor shaft I9 is formed to provide a driving gear 23.
  • the corresponding sides 24 of each tooth of this gear 23 are formed substantially triangular in cross section, and the top edges of the gear are preferably flat as at 25.
  • the opposite end portion of the rotor shaft i9 is journaled through a bearing 25 provided by a bracket 21 fixed to the stator I! as at 28.
  • the teeth of the driven gear [3 at corresponding sides 29 are likewise triangular in cross section, with the apexes extending radially from the long axis of the gear l3.
  • the tops 30 of the teeth of the gear I 3 are semicircular in cross section and merge into parallel adjacent walls 29'.
  • the work shaft By disengaging the driving gear from the driven gear when the stator of the motor is deenergized, which results in the rotor being moved from the magnetic field of the stator by the spring 20, the work shaft It can be freely and manually rotated when occasion arises.
  • a disc 3! On one face of the rotor is arranged a disc 3! by pressing against the rotor shaft l9 attaching prongs 32.
  • This disc at predetermined points on one face thereof is provided with braking elements 33.
  • This disc like the disc 3!, at predetermined points is provided with braking elements 35.
  • the arrangement is such that when the stator is deenergized, the braking elements 33 of the disc 3
  • Fig. 9 I have shown the same construction as that shown in Fig. 4, except in Fig. 9 the gear 23 remains in meshing engagement with the gear [3 during the braking action of the braking cams 33 and 36.
  • An electric motor including a rotor and a stator, a shaft supporting the rotor for rotation with respect to the stator and for movement from a central position with respect to the stator, a stationary sleeve embracing one end of the shaft at one side of the rotor, a coil spring embracing said sleeve and yield'ably bearing on the rotor to move the rotor from said central position with respect to the stator upon deenergization of the latter, and a braking device comprising confronting brake discs, one carried by the rotor on the side thereof opposite the side of the rotor engaged by the spring and theother carried by the stator and effective to brake rotation of the rotor upon deenergization of the stator and projection of the rotor by said spring to a decentral position with respect to said stator.
  • An electric motor including a rotor and a stator, a shaft supporting the rotor for rotation with respect to the stator and for movement from acentral positionwith respect to the stator, a stationary sleeve embracing one end of the shaft at one side of the rotor, a coil spring embracing said sleeve and yieldably bearing on the rotor to move the rotor from said central position with respect to the stator upon deenergization of the latter, a braking: device comprising confronting brake di'scs,,one. carried by the rotor on the side thereof opposite the side of the rotor engaged by the spring: and. the.
  • stator other carried by the stator and effective to brake rotation of the rotor upon deenergization of the stator and projection of the rotor by said spring to a decentral position with respect tosaid stator, and radially disposed laterally projecting braking elements on the confronting faces of said discs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Braking Arrangements (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Description

Jilly 27, 1954 L. A. DURANT 2,685,043
BRAKE FOR ELECTRIC MOTORS Filed March 22, 1952 Patented July 27, 1954 BRAKE FOR ELECTRIC MOTORS Lyndon A. Durant, Chicago, Ill., assignor to General Patent Corporation, Chicago, 111., a corporation of Illinois Application March 22, 1952, Serial No. 278,080
2 Claims. 1
This invention relates to certain new and useful improvements in motor-driven gears and has as an object the provision of an improved construction of the character hereinafter described which will be highly efficient in use and economical in manufacture.
The present invention constitutes an improvement over that shown in application of Leo Galinslri for United States Letters Patent, Serial No. 278,079, filed on even date hereof.
Specifically the present invention relates to a simple and efficient arrangement for braking the rotation of the rotor of an electric motor and thereby preventing overriding of such rotor by its own inertia.
Other objects will appear hereinafter.
The invention consists in the novel combination and arrangement of parts to be hereinafter described and claimed.
The invention will be best understood by reference to the accompanying drawings showing the preferred form of construction, and in which:
Fig. 1 is a perspective view of a motor embodying my invention;
Fig. 2 is an elevational view of one side of the motor;
Fig. 3 is a bottom view showing the rotor attracted to its normal operative position with respect to the stator;
Fig. 4 is an enlarged sectional detail view taken substantially on line 4-4 of Fig. 3; W
Fig. 5 is a sectional detail view taken substantially on line 55 of Fig. l;
Fig. 6 is a view of a disc member embodied in the invention, looking in the direction of line 6-6 of Fig. 4;
Fig. 7 is an end view of the driving gear embodied in the invention;
Fig. 8 is an enlarged elevational View of the driven gear embodied in the invention;
Fig. 9 is a sectional View similar to Fig. 4 but showing a construction in which the driving gear embodied in the invention remains at all times in driving engagement with a driven gear.
In the drawings I have shown a preferred form of construction by which the several objects of my invention are accomplished. In this connection, a mounting plate is indicated at H). By means of such plate the motor I l is mounted to a fixed support. This mounting plate I0 is hollow in construction to provide an enclosure for a train of gears I 2 including a driven gear it, an intermediate gear 14, and a pinion I5, the latter mounted on a work shaft 16. The intermediate gear is operativel connected to the driven gear by a pinion l3. The motor I l comprises a stator I! and a rotor H3. The rotor I8 is mounted on a shaft l9. Such shaft 19 together with its rotor is normally projected laterally with respect to the stator IT by means of a spring 23 arranged between the rotor 18 and the adjacent wall 21 of the mounting plate H) and mounted to embrace a sleeve 22 fixed to the wall 2|.
One end of this rotor shaft I9 is formed to provide a driving gear 23. The corresponding sides 24 of each tooth of this gear 23 are formed substantially triangular in cross section, and the top edges of the gear are preferably flat as at 25. The opposite end portion of the rotor shaft i9 is journaled through a bearing 25 provided by a bracket 21 fixed to the stator I! as at 28.
The teeth of the driven gear [3 at corresponding sides 29 are likewise triangular in cross section, with the apexes extending radially from the long axis of the gear l3. The tops 30 of the teeth of the gear I 3 are semicircular in cross section and merge into parallel adjacent walls 29'. By forming the abutting faces or sides of the teeth of the driving gear 23 and those of the driven gear 13 triangular in cross section, with the apexes extending radially with respect to the long axis of the gears, whenever the gears are moved into meshing relation with respect to each other such gears will be self-aligning so that a proper driving engagement will result, irrespective of whether the teeth of the one gear are out of alignment with the teeth of the other of the gears.
By disengaging the driving gear from the driven gear when the stator of the motor is deenergized, which results in the rotor being moved from the magnetic field of the stator by the spring 20, the work shaft It can be freely and manually rotated when occasion arises.
On one face of the rotor is arranged a disc 3! by pressing against the rotor shaft l9 attaching prongs 32. This disc at predetermined points on one face thereof is provided with braking elements 33. On one face of the bearing 26, opposite the disc 3l, is fixed a disc 34 by means of tabs 35. This disc, like the disc 3!, at predetermined points is provided with braking elements 35.
The arrangement is such that when the stator is deenergized, the braking elements 33 of the disc 3| will engage the braking elements 36 of the disc 34, with the result that the rotor will be brought to a stop and prevented from overriding by its own inertia. Upon energization of the stator, the rotor will shift laterally within the magnetic field of the stator and thus project the driving gear 23 into meshing engagement with respect to the driven gear 13.
In Fig. 9 I have shown the same construction as that shown in Fig. 4, except in Fig. 9 the gear 23 remains in meshing engagement with the gear [3 during the braking action of the braking cams 33 and 36.
The simplicity of the construction of my invention will be obvious from the description herein. My invention. may be manufactured at an economical cost.
While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variationand modification without departing from the spirit of the invention. I, therefore-,do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come; within the scope of the appended claims.
Having thus described, my invention, what I claim as new and desire to protect by Letters Patent is:
1. An electric motor including a rotor and a stator, a shaft supporting the rotor for rotation with respect to the stator and for movement from a central position with respect to the stator, a stationary sleeve embracing one end of the shaft at one side of the rotor, a coil spring embracing said sleeve and yield'ably bearing on the rotor to move the rotor from said central position with respect to the stator upon deenergization of the latter, and a braking device comprising confronting brake discs, one carried by the rotor on the side thereof opposite the side of the rotor engaged by the spring and theother carried by the stator and effective to brake rotation of the rotor upon deenergization of the stator and projection of the rotor by said spring to a decentral position with respect to said stator.
2. An electric motor including a rotor and a stator, a shaft supporting the rotor for rotation with respect to the stator and for movement from acentral positionwith respect to the stator, a stationary sleeve embracing one end of the shaft at one side of the rotor, a coil spring embracing said sleeve and yieldably bearing on the rotor to move the rotor from said central position with respect to the stator upon deenergization of the latter, a braking: device comprising confronting brake di'scs,,one. carried by the rotor on the side thereof opposite the side of the rotor engaged by the spring: and. the. other carried by the stator and effective to brake rotation of the rotor upon deenergization of the stator and projection of the rotor by said spring to a decentral position with respect tosaid stator, and radially disposed laterally projecting braking elements on the confronting faces of said discs.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,501,497 Schwarz July 15, 1924 1,771,281 Wilsing July. 22, 1930 1,903,230 Stewart a- Mar. 28,1933 2,052,929- Kronmiller Sept. 1, 1936 2,172,440 Edmondson Sept. 12, 1-939 2445,6518 Bishofberger July 20, 1-948
US278080A 1952-03-22 1952-03-22 Brake for electric motors Expired - Lifetime US2685043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US278080A US2685043A (en) 1952-03-22 1952-03-22 Brake for electric motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US278080A US2685043A (en) 1952-03-22 1952-03-22 Brake for electric motors

Publications (1)

Publication Number Publication Date
US2685043A true US2685043A (en) 1954-07-27

Family

ID=23063597

Family Applications (1)

Application Number Title Priority Date Filing Date
US278080A Expired - Lifetime US2685043A (en) 1952-03-22 1952-03-22 Brake for electric motors

Country Status (1)

Country Link
US (1) US2685043A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2741713A (en) * 1954-07-12 1956-04-10 Rowley Arthur Miniature precision motor and driving assembly
US2872671A (en) * 1956-08-09 1959-02-03 Ibm Shaft position indicating device
US2883596A (en) * 1955-10-10 1959-04-21 Alliance Mfg Co Remote control positioner
US3110830A (en) * 1962-04-16 1963-11-12 Electro Counter & Motor Corp Rotor brake
US3480119A (en) * 1967-03-16 1969-11-25 Gardner Denver Co Wire-wrapping tool with predetermined position stop
US3530321A (en) * 1964-05-21 1970-09-22 Skill Di Inc Electric motor with axially movable rotor
US3819223A (en) * 1972-11-28 1974-06-25 Spector G Kamp-top
US4129797A (en) * 1976-06-30 1978-12-12 Siemens Aktiengesellschaft Brake device for drive motors
US4535261A (en) * 1981-06-03 1985-08-13 Ckd Controls Limited Smallsize motor with reduction gear and clutch mechanism
US4885489A (en) * 1988-03-30 1989-12-05 Honeywell Inc. Permanent magnet motor with hysteresis drag cup coupling
DE8632654U1 (en) * 1986-12-05 1990-08-02 Robert Stahlschmidt RST Motorenwerk GmbH, 4800 Bielefeld Electric motor
DE102013013375A1 (en) * 2013-08-10 2015-02-12 Oechsler Aktiengesellschaft Electromotive actuator for a parking brake

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1501497A (en) * 1921-03-03 1924-07-15 Dayton Kngineering Lab Company Connecting mechanism
US1771281A (en) * 1927-03-03 1930-07-22 Demag Ag Electric hoisting gear
US1903230A (en) * 1929-07-13 1933-03-28 Howard D Colman Electric valve operator
US2052929A (en) * 1932-10-27 1936-09-01 Honeywell Regulator Co Electrically operated fluid flow controlling mechanism
US2172440A (en) * 1936-11-18 1939-09-12 Honeywell Regulator Co Automatic brake for motor shafts
US2445658A (en) * 1943-12-24 1948-07-20 Honeywell Regulator Co Motor and brake construction

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1501497A (en) * 1921-03-03 1924-07-15 Dayton Kngineering Lab Company Connecting mechanism
US1771281A (en) * 1927-03-03 1930-07-22 Demag Ag Electric hoisting gear
US1903230A (en) * 1929-07-13 1933-03-28 Howard D Colman Electric valve operator
US2052929A (en) * 1932-10-27 1936-09-01 Honeywell Regulator Co Electrically operated fluid flow controlling mechanism
US2172440A (en) * 1936-11-18 1939-09-12 Honeywell Regulator Co Automatic brake for motor shafts
US2445658A (en) * 1943-12-24 1948-07-20 Honeywell Regulator Co Motor and brake construction

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2741713A (en) * 1954-07-12 1956-04-10 Rowley Arthur Miniature precision motor and driving assembly
US2883596A (en) * 1955-10-10 1959-04-21 Alliance Mfg Co Remote control positioner
US2872671A (en) * 1956-08-09 1959-02-03 Ibm Shaft position indicating device
US3110830A (en) * 1962-04-16 1963-11-12 Electro Counter & Motor Corp Rotor brake
US3530321A (en) * 1964-05-21 1970-09-22 Skill Di Inc Electric motor with axially movable rotor
US3480119A (en) * 1967-03-16 1969-11-25 Gardner Denver Co Wire-wrapping tool with predetermined position stop
US3819223A (en) * 1972-11-28 1974-06-25 Spector G Kamp-top
US4129797A (en) * 1976-06-30 1978-12-12 Siemens Aktiengesellschaft Brake device for drive motors
US4535261A (en) * 1981-06-03 1985-08-13 Ckd Controls Limited Smallsize motor with reduction gear and clutch mechanism
DE8632654U1 (en) * 1986-12-05 1990-08-02 Robert Stahlschmidt RST Motorenwerk GmbH, 4800 Bielefeld Electric motor
US4885489A (en) * 1988-03-30 1989-12-05 Honeywell Inc. Permanent magnet motor with hysteresis drag cup coupling
DE102013013375A1 (en) * 2013-08-10 2015-02-12 Oechsler Aktiengesellschaft Electromotive actuator for a parking brake

Similar Documents

Publication Publication Date Title
US2685043A (en) Brake for electric motors
US2507756A (en) Mechanical movement with constantly or intermittently driven member
US3168840A (en) Stop-start reverse mechanism
US1960004A (en) Power transmitting mechanism
US2760092A (en) Automatic clutches for motor-driven gears
US2673939A (en) Drive-control for synchronous motors
US2710359A (en) Automatic clutch and brake
US3110830A (en) Rotor brake
US3813754A (en) Apparatus for tying coils
US2832443A (en) Arresting means for preventing overrun of revolving shaft
DE2838339A1 (en) Coin operated amusement machine - has synchronous motor drive through flexible coupling to disc with peripheral marked indicator
US3801841A (en) Drive gearing for generator of electrical signal pulses
DE2420869C3 (en) Electric motor with a unidirectional coupling
US3820160A (en) Indexing mechanism
DE102020205349A1 (en) MOTOR WITH REDUCTION GEAR
US1616465A (en) Noiseless clock mechanism
DE711342C (en) Time remote switch, especially for stairwell lighting
US2044423A (en) Starting device for synchronous electric motors
US1465670A (en) Clutch brake for card feeders
DE2036438C3 (en) Drive device for step-by-step and continuous operation
JPH0223052A (en) Geared motor
US3335301A (en) Intermittent drive mechanism
US2383418A (en) Escapement
KR0129655Y1 (en) Transmission device for a robot
DE645847C (en) Device for alternately driving and braking the coils in devices for magnetic sound recording and / or playback