SUBSTANCE: proposed braking assembly comprises electromagnet, brake spring and braking plates. One of the latter is rigidly fitted on the shaft while another one moves only axially. Braking and stop locking are performed by braking plates with their contact surfaces representing radially arranged teeth. Profile of teeth on one plate matches that of grooves on opposite plate.
EFFECT: reduced weight and sizes, higher reliability and longer life.
The invention relates to the field of electrical engineering, in particular the brake device intended to stop the electric machines with low frequency of rotation of the shaft.
Known Sanatornaya synchronous motor with axial excitation (A.S. USSR №788279, NC 7/106, 29.01.79 g)containing the stator winding, the rotor, the housing and bearing shields of like material, the first of which, provided with a diamagnetic ring insert, a fortified site of the brake anchor, a spring-loaded to the brake block friction strip, where for performance reasons, the motor provided short-circuited electrically conductive ring mounted coaxially to the rotor at the second end shield.
A known motor (patent RU №2321142, NC 19/24, NC 29/06, NC 37/10, priority, 14.06.2006,). Close is the solution for the second claim of the patent. A motor to drive an electric actuators and devices containing the toothed magnetic rotor and a stator in the form of a magnetic core with poles and segments and alternating circumferentially tangentially magnetized permanent magnets, the poles are placed coil m-phase windings, each segment adjacent permanent magnets of the same polarity, the number of buckets and poles is a multiple of 2m, the teeth on the segments and the rotor is made with equal steps, the axis of the teeth adjacent segments shifted by the angle 360/2 m El. degrees, the winding of each phase is executed from the serial connection of the coils placed on the poles, separated from each other by m-1 pole, where according to the invention placed on the stator electromagnetic brake with a friction element, the movable part which is connected with the shaft of the motor winding brakes are put into operation simultaneously with the windings of the motor.
Known motor with electromagnetic brake, produced by LLC "ESCO", Republic of Belarus, http : //www.esco-motors.ru/php engines. Electromagnetic brake mounted on the rear end shield of the motor includes a housing, an electromagnetic coil or a set of electromagnetic coils, brake spring, anchor, representing the anti-friction surface for the brake disk, the brake disk friction bezuspeshnye lining. At rest, the motor is braked, the pressure of the spring on the anchor, which, in turn, exerts pressure on the brake disk, causing the locking of the brake disc and creates a braking torque. Brake release is by applying voltage to the coil of an electromagnet and pull anchor excited electromagnet. Liquidated thus the m push anchors on the brake disc causes it to leave and free rotation with the shaft of the electric motor or working together with a brake device. It is possible to equip the brake lever for manual dispensing, providing the switch actuator in the event of a power failure, required to leave the brakes.
Known brake site, embedded in the motor, manufactured by CJSC "Berobot", Republic of Belarus, http://www.belrobot.by/catalog.asp?sect=2&subsect=4. Brake hub, fixed to the rear end shield of the motor includes a housing, an electromagnet, spring anchor, installation disc, brake disc with double-sided friction plates, the screw of adjustment of the braking torque. In the absence of voltage on the electromagnet, the spring moves the armature and presses the brake disc to the installation disk, linking through the friction surface of the rotor and its housing. When applying voltage to the electromagnet moves the anchor, compressing the spring, and releases the brake disc, and with it the motor shaft.
General shortcomings of the above described devices is pad wear brake discs, a sufficiently large power consumption of the electromagnet to overcome the clamping force of the spring and, as a consequence, large dimensions and weight.
The aim of the invention is the reduction of overall dimensions and weight of the brake Assembly, reduction of electric power to the coil, increasing the reliability and duration of the service is s the brake Assembly.
Specified target reach the fact that brake the node containing the solenoid, brake spring, brake discs, one of which is rigidly fixed on the shaft, and the other is movable only in the axial direction, according to the invention the braking and locking stop is realized by means of the brake discs, the mating surfaces are in the form of radially arranged teeth, and the profile of the teeth of one disk matches the profile of the grooves of the other disk.
The invention is illustrated by drawings.
Figure 1 is a General diagram of the electric machine with the brake node.
Figure 2 is a view of a rigid disk brake Assembly.
Figure 3 is a view of rolling in the axial direction of the disc brake Assembly.
Brake node contains the electromagnet 1, the brake spring 2 is rigidly mounted on the shaft brake disk drive (HDD) 3, coaxially which is movable in the axial direction of the brake disc (the disc) 4 and fixed on the bearing shield guides 5, which moves the movable disk 4. The mating surfaces of the brake discs made in the form of radially arranged teeth. The number, dimensions and strength of teeth of the brake disk 3 and 4, as well as the strength of the rails 5 so expect to withstand the forces occurring during a forced shutdown rotate is eghosa shaft. In order to secure engagement with the shaft to rotate with the hard drive you can perform slots hard disk of a width considerably greater width of teeth of the rolling disk and the force of the spring must provide the necessary rate of occurrence of the teeth in the grooves. It should be noted that the mating surfaces can be made in the form of slots or similar elements that essential sign is not, but the profile of the teeth of one disk must match the profile of the grooves of the other disk for free entry to the link.
For more convenient considering figure 2 and 3 shows an example of arrangement of teeth on the mating surfaces of the brake discs. Figure 2 hard disk 3 has 36 teeth 6 and figure 3 moveable disk has a 3 prong 7. The profile of the teeth 7 of the rolling disc 4 corresponds to the profile grooves of the hard disk 3.
Brake Assembly operates as follows
In the absence of voltage on the electromagnet 1 spring 2 holds the disc 4 so that its teeth 7 are located in the grooves located between the teeth 6 of the hard disk 3, forming mesh, securely locking the shaft.
When applying voltage to the electromagnet 1 is movable disk 4 under the action of electromagnetic forces moved along the guide rails 5 to the electromagnet 1 and compressing the spring 2, releases the shaft.
With a sudden loss of power Pete is tion disappears electromagnetic coupling between the electromagnet 1 and the movable disc 4 spring 2 moves the movable disk 4 and the teeth 7 are slots hard disk 3, forming mesh, securely locking the shaft.
For specialists in this area it is obvious that the braking using the brake discs on the mating surfaces radially spaced teeth, compared with braking brake discs with pads, requires less force of the spring, which in this case only moves the disc, but does not generate a braking torque, while using significantly less electric power, thereby reducing the overall dimensions and weight of the brake Assembly. The engagement of the brake discs "tooth in the groove" provides reliable fixation of the stop, not allowing the shaft to rotate, and the exception pads brake discs increases the service life of the brake Assembly and all electrical machines.
Brake the node containing the solenoid, brake spring, brake discs, one of which is rigidly fixed on the shaft, and the other is movable only in the axial direction, characterized in that the braking and locking stop is realized by means of the brake discs, the mating surfaces are in the form of radially arranged teeth, and the profile of the teeth of one disk matches the profile of the grooves of the other disk.
SUBSTANCE: invention refers to the field of electric engineering, in particular, to electric machines, and relates to features of design of electric motors with low rpm. Electric motor (10) is proposed with low rpm, comprising rotor (17), with supply from source of three-phase AC voltage, magnets (21, 22) and stator coil (24). Rotor (17), stator (24) and magnets (21, 22) are located in body (13) of pulley, which rotates around fixed axis (11), besides, rotor (17) is fixed to body (13), coil of stator (24) is arranged with supply from DC voltage source. Magnets (21, 22), forming stator (24), are fixed to axis (11) and are arranged with the possibility to locate a stator (24) coil in them, and body (13) of pulley is fixed to two diamagnetic side plates (16, 16'). Motor comprises electromagnet brake (25), including two metal disks, one of which is arranged as a whole with one of specified diamagnetic plates (16'), and the other one with magnet (22), which forms poles of stator (24), and spring pushes of disks arranged in according slots of magnet (22). To resist action of lowering braking disk, there is a thrust bearing. Besides, the possibility to control frequency of rotor voltage is provided to produce required motor rpm.
EFFECT: production of perfect working characteristics of motor with low rpm, having compact design, which does not require step-down gear.
7 cl, 1 dwg
FIELD: electrical engineering.
SUBSTANCE: proposed device comprises rotor accommodating permanent magnets fixed in dielectric material and running in rolling bearings between two disks of stator. The latter comprises horseshoe-shaped magnetic cores with poles and windings connected in series. Crankshaft with clutch disk and overrunning cutch disk with con-rod runs in bearing fitted in the base, said disks being fitted on opposite ends of crankshaft. Free end of said con-rod is pin-coupled with the lever linked up with rotor disk periphery. Aforesaid base supports motor with independent power supply. Flywheel is fitted on one extension of motor shaft and crankshaft clutch disk is fitted on opposite end of the shaft.
EFFECT: higher efficiency of conversion.
SUBSTANCE: present invention relates to electrical engineering and electromechanics, particularly to electric machines, and pertains to distinct features of design of a planetary electric motor - reducing gear with a lever for controlling the commutator. To increase excentricity of rotation of the commutator by several times compared to excentricity of the satellite - armature, the proposed planetary electric motor - reducing gear employs a lever for controlling the commutator. The proposed planetary electric motor - reducing gear has a planetary gear system in form of a friction pair or planetary reduction gear, the first step of which executes functions of the stator and satellite - armature of the electric motor. The commutator rotates synchronously with the satellite - armature. The stator and satellite - armature are fitted with solenoid coils, which shift the satellite - armature about the point of maximum entrance of teeth of the wheel and primary pinion of the planetary reduction gear into each other, or about the point of contact of the friction pair. The commutator, which can rotate excentrically about the housing, provides for phase shifting of the electromotive force of the electric motor and closes the solenoid coils of the stator and satellite - armature. The lever for controlling the commutator has different arms, the end of the shorter one of which engages the statellite - armature, and the end of the longer one enters the collector, providing for its rotation with excentricity, which exceeds excentricity of rotation of the satellite - armature. The commutator can be used with butt-end and cylindrical arrangement of contacts. The current input and output elements of the commutator do not rotate, they only oscillate.
EFFECT: improved operation of a planetary electric motor - armature, reduced spark formation of the brushes and electric arc from commutator contacts, as well as provision for wide regulation of frequency of rotation, torque and reversing the electric motor.
6 cl, 8 dwg
SUBSTANCE: invention is related to electric engineering and may be used in electric machine industry, namely, in electromechanical power devices, in particular, in straight-running actuating electric mechanisms for movement of working elements of different machines and in the most different areas of machine building, metallurgy, etc. Straight-running actuating electric mechanism contains casing, on which electric motor is installed as well as screw with master and slave pulleys and drive belt, protective tube with front bushing, in which stem with power nut is installed with the possibility of longitudinal displacement. Induction limit switches are installed in the window of protective tube with the possibility of precise and independent tuning motion in parallel guides provided in the form of threaded pins and slots installed in the box. On external surface of stem opposite to every limit switch deepenings are provided that are displaced in relation to each other in angular and axial direction, and inclined flat - opposite to induction position sensor installed in front bushing.
EFFECT: increase of technological resources of straight-running actuating mechanism.
5 cl, 6 dwg
FIELD: engines and pumps, electrical engineering.
SUBSTANCE: two-speed transmission (100) comprises a planetary transmission incorporating input pulley (10) coupled with the input spider (20) and a sun gear (18) and gear wheel (17). Input spider (20) contains also a large number of planetary gears (15) arranged between the sun gear (18) and gear wheel (17). Sun gear (18) comes into mesh with the electromagnetic brake element (190). Gear wheel (17) comes into mesh with output pulley (30). Idling clutch (22) is arranged between input spider (20) and output shaft (31). Brake element (190) comes into mesh with the engine idling and gets out of mesh at ratios exceeding the idling speed. When brake element (190) comes into mesh, sun gear (18) does not run thus allowing gear wheel (17) and output pulley (30) to revolve at higher speed ccompared to that of the input pulley (10).
EFFECT: expanded performances.
24 cl, 14 dwg
FIELD: electrical engineering, applicable for imparting of a precision turn, rotary and oscillatory motions to various mechanisms within a wide range of angles and angular velocities.
SUBSTANCE: the electric drive has a step motor, whose shaft is coupled to the electric drive output shaft through a reduction gear. An additional motor is kinematically linked with the output shaft of the electric drive by a belt transmission, and the torque developed by it on the output shaft exceeds the friction torque on the output shaft, but it doesn't exceed the torque on the output shaft from the step motor. The electric drive control system has a DC voltage source, step motor with a stop motor control unit, additional motor with a selector switch of the direction of its rotation. The step motor control unit is provided with control outputs, and its input is connected to the DC voltage source. The additional motor is connected to an additional supply source via the selector switch of the direction of its rotation, and its control inputs are connected to the control outputs of the step motor.
EFFECT: expanded dynamic range of rotary speeds of the output shaft, enhanced reliability, precision of the rotary speed and provided a turn of the output shaft through the preset angle.
2 cl, 4 dwg
FIELD: electrical engineering, applicable for imparting of a precision turn and rotary motion to various mechanisms within a wide range of angles and angular velocities.
SUBSTANCE: the electric drive has a step motor, whose shaft is coupled to the output shaft through a reduction gear. An additional motor is kinematically linked with the output shaft by a belt transmission, whose belt envelopes the drive and driven pulleys located respectively on the shaft of the additional motor and an the output shaft. The torque developed by the additional motor on the output shaft exceeds the friction torque on the output shaft, but it doesn't exceed the torque on the output shaft from the step motor. The electric drive control system has a DC voltage source, step motor with a step motor control unit, additional motor with a selector switch of the direction of its rotation. A DC motor is used as the additional motor, it is connected via the selector switch of the direction of its rotation to the additional DC voltage source with a drooping volt-ampere characteristic. The second modification of the electric drive and of the system of its control provides for installation of the driven pulley on the output shaft of the step motor.
EFFECT: expanded dynamic range of rotary speeds of the motor output shaft of the electric drive, enhanced reliability, precision of the rotary speed and provided a turn of the motor output shaft through the preset angle.
4 cl, 4 dwg
FIELD: electric machinery, particularly electromechanical power equipment, for mechanical engineering, metallurgy and so on.
SUBSTANCE: mechanism comprises body. Electric motor, bearing-carrying screw with pulleys and driving belt and driving belt tension control means are arranged on the body. Protective pipe is located in the body. Installed in the protective pipe is bush arranged so that the bush may slide in longitudinal direction along guider inside the bush by means of rod with power nut and head. Dowel of rod rotation prevention means and bearing clamping nut are secured to inner surface of protective pipe. The bearings are connected to screw through intermediate bush. Mechanical retaining means, which fixes bearing clamping nut inside the body, is located on the bearing clamping nut. Protective pipe is provided with inductive end switches. Stops are inserted inside protective pipe from both ends thereof. Longitudinal groove, radial orifice and outer bead are provided in rod end. The outer bead may cooperate with the stops. Insert is introduced into longitudinal groove and radial orifice so that the insert encloses the dowel by side surfaces thereof. The insert is provided with projection arranged in dowel slot of power nut located inside the rod. Intermediate bush is made as an integral part and connected to screw by means of fixing member installed in place of any bearing installation.
EFFECT: increased reliability.
5 cl, 6 dwg
FIELD: electrical and general mechanical engineering; self-braking motors built around squirrel-cage induction motors.
SUBSTANCE: stator and rotor contacting surfaces of motor-brake built around squirrel-cage induction motor are provided with taper thread; rotor shaft is supported on one end by radial bearing and on other one, by thrust bearing with spacer disk affording cohesion between stator and rotor threaded surfaces during reverse movement of rotor; shaft extension of the latter is splined.
EFFECT: simplified design, enhanced reliability of brake-motor.
1 cl, 2 dwg
FIELD: electrical engineering.
SUBSTANCE: proposed face-type electrical machine has single-disk stator and single-disk rotor, as well as reliable built-in braking device affording motor stopping as soon as field winding is deenergized. Rotor disk is coupled with rotor shaft through splined joint admitting axial displacement of rotor disk relative to shaft. Braking device disposed on one of bearing end-shields of machine frame is equipped with adjusting members enabling desired positioning of rotor disk inside annular space of machine and adjustment of brake spring pressure. Shaped supports are used for installing stator core separated from rotor core by air gap which are rigidly coupled with stator core and are free to displace relative to bearing end-shield whereon they are all secured upon setting desired air gap.
EFFECT: reduced size, facilitated maintenance, enhanced operating reliability.
6 cl, 1 dwg
SUBSTANCE: braking device for canvas blind drive comprises support element, friction braking element and coupling ring. Support element has mounting seat wherefrom braking element extends. Braking element can displace between first position whereat it stays in surface contact with clamping ring and second position braking element and clamping ring are spaced apart. Braking element and support are provided with locking appliance to retain the former locked on the latter. Locking appliance represents a convex zone of mounting seat edge that surrounds braking element perimetre. Said convex zone is directed towards the support center. Canvas blind drive comprises aforesaid braking device.
EFFECT: higher drive efficiency.
7 cl, 7 dwg
FIELD: textile, paper.
SUBSTANCE: machine containing the device for the filing the first fibre cloth and placing it on the ring bearing alternately in one direction and in the opposite direction between coaxial circular outer ring and inner-ring, located on each side of the ring supports, to form a transverse first ring canvas. Also the device contains elements to hold cross-ring canvas on the outer and inner ring, a unit for second fibre canvas feeding on the ring support and its installation in the circumferential direction between the outer and inner rings to form a circular second ring of the canvas, a unit for linking and cross-county circular canvases with each other, and a device for driving cross-county and circular canvases to rotate around the axis of the outer and inner rings.
EFFECT: reduction of textile operations and waste production, reduction of production cost.
22 cl, 2 ex, 2 tbl, 19 dwg
SUBSTANCE: in compliance with the first version, guide device comprises hub flange and plate flange. Hub flange has assemblage of plate mounting orifices, plate guide surface and plate mounting surface. Plate mounting orifices are arranged between guide surface and hub axle. Plate flange has hub mounting surface and multiple orifices for jointing to the hub. Plate guide surface engages with hub guide surface to align concentrically the plate with the hub, plate sleeve and plate flange that runs radially outward from the sleeve. Orifices for jointing to the hub are arranged between hub guide surface and sleeve. In compliance with the second version, guide device comprises encased wheel hub, hub axle and flange with lug, and plate. Hub flange is made on hub case. Hub flange has plate guide surface and outer edge. Plate has sleeve and flange running radially. Plate is attached to wheel hub. Plate flange comprises hub guide surface and outer edge. Note here that hub guide surface can interact with plate guide surface to align hub concentrically with plate in assembly. Plate flange is attached to hub flange by fasteners. Plate guide surface is made on lug for female coupling with hub guide surface.
EFFECT: lower mechanical strain and longer fatigue life.
15 cl, 7 dwg
FIELD: machine building.
SUBSTANCE: brake disk comprises flange or splines for it to be attached to wheel hub, working surfaces to interact with brake liners and vent channels. The latter are arranged between working surfaces. Vent channel width A and disk thickness B are selected to satisfy the relationship A/B>0.38.
EFFECT: higher efficiency of cooling, reduced wear, longer life; stable braking.
FIELD: machine building.
SUBSTANCE: brake disk comprises flange or splines for it to be attached to wheel hub, working surfaces to interact with brake liners and vent channels. The latter are arranged between the working surfaces. Transition radius of surfaces that make vent channels exceeds four millimetres.
EFFECT: higher efficiency of braking, reduced coefficient of friction.
FIELD: automotive industry.
SUBSTANCE: invention relates to automotive industry, namely, to disk brakes. Proposed brake disk is made in cast iron and represents a sliding disk of the disk-type brake. Proposed disk comprises outer edges, inner edges and alternating teeth and gaps along the said inner edges. Note here that it incorporates means designed to reduce fracture formation caused by irregular characteristics of the brake disk elongation. The disk features zones with reduced material thickness in every tooth, as compared with that along the radius outside the gaps between teeth, and has no similar thickness reduction on gaps between teeth. Aforesaid material thickness reduction zones formed in disk casting are located in transition between teeth and main part of brake disk, and pass partially along imaginary circumference with radius of the gap lower parts. Aforesaid zones represent either zones not forming through holes, or zones representing axial openings or holes. Arc-like transition parts with adjacent teeth and or rectilinear or almost rectilinear part between the said transition parts form lower part of every gap. Each transition part features radius R, while rectilinear part length is smaller than 1.5R.
EFFECT: reduced risks of fracture formation, higher strength.
10 cl, 3 dwg
SUBSTANCE: invention relates to automotive industry, particularly, to clasp brakes. The propose clasp brake incorporates a caliper enveloping one or more brake plates, a hub or a part linked up wit the hub. Spreader bars are arranged between the brake disk and hub or the part linked up wit the hub. The spreader bars are arranged to prevent contact between brake plate spline end faces and the hub spline end faces, or the part jointed to the hub, at whatever radial shift of the brake plate relative to the hub or the part jointed thereto. At least, one part of the spreader bar features such sizes and rigidity relative to the brake plate, hub or part splines that, at whatever radial shifts of the brake plate to the hub or part jointed thereto, all radial forces are transmitted from the brake plate to the hub or the part jointed to it only via, at least, one part of the spreader bar. The sizes are selected so as to provide a contact between the brake plate spline end faces those of the hub or the part jointed thereto in rotary engagement between the brake plate and hub or the part jointed thereto to transmit rotary motion in braking.
EFFECT: damping radial impacts or radial shifts between brake plate and hub, particularly, between end faces of appropriate splines.
13 cl, 9 dwg
SUBSTANCE: clasp brake incorporates a caliper with one or more brake-shoe linings surrounding one or more brake disks. One of the brake disks slides on over the central part representing a hub, sleeve or the like part. The said central part is fitted on the wheel axle or the like part. The disks are coupled with the central part with the help of teeth, splines or the like parts so the disks cannot rotate but are fitted to slide on along the axle. The contact parts of the teeth or the like parts of at least one disk and/or of the central part feature an arc-like shape if seen along the wheel axle. The contact parts represent the parts of the teeth surfaces to be engaged with each other with the brake released. The said contact parts of every tooth and/or spline of the said central part feature the arc-like shape with the total arc length exceeding 360°/Z, and preferably larger than 2(360°/Z), where Z is the number of teeth of the disk and central part respectively.
EFFECT: reduced noise and vibration with brake released, higher wear resistance in interface between brake disks and central part.
15 cl, 13 dwg
FIELD: mechanical engineering; vehicle multiple-disk brakes.
SUBSTANCE: proposed brake disk contains friction member made of carbon composition with rectangular slots uniformly spaced over circumference in each of which two metal U-shaped load-bearing clamp-like inserts are fitted. Each such clamp engages by walls with side surface of slot and end face surfaces of friction member, being secured on disk by rivets. At least two vertical cuts pointed to each other and displaced relative to each other are made in each clamp on walls in contact with end face surfaces of friction member. Cuts are made to provide elastic deformation of clamp and its mounting on friction member with preload to guarantee locking of clamp to prevent its turning relative to axis of rivet.
EFFECT: improved reliability and increased service life of disk owing to prevention of destruction of friction member made of monocarbon under action of thermal, power and vibration loads.
FIELD: mechanical engineering.
SUBSTANCE: disk brake comprises support that is rigidly connected to the brake and embraces one or more brake disks, at least one stop plate, and set of braking linings. The brake disks are mounted on the rotating hub without permitting rotation with respect to the hub and for permitting movement in the axial direction with respect to the hub by means of springs for transmitting brake moment from the brake disk to the hub. The braking linings are mounted for permitting movement in the axial direction inside the support that undergoes loading on the brake linings. The support has an opening through which the brake lining can be inserted or removed.
EFFECT: enhanced reliability.
13 cl, 15 dwg