CN200996421Y - Power-off friction brake - Google Patents

Abstract

A power brake friction arrester includes a post cover (1), an electromagnetic system (2),a floor (24), a shell (27), a pressing board (26), an inner ring (23),a brake coil (25) , a friction braking system (3), a brake plate (31), a right-friction (32), a right friction (33), a pressing reed (34), a front cover (4), and an output shaft (5), the brake is characterized in that the pressing reed(34) is arranged out of the brake coil (25) of the arrester, when the power is off, the braking plate (31) is stopped under the effect of the pressing reed (34), the pressing board (26), the right friction plate (32), and the left friction plate (33), thus the output shaft (5) stops moving. When the power is on, the electromagnetic system (2) produces the magnetic field, the pressing board (26) is absorbed to the inner ring (23) by the magnetic field, the brake plate (31) can freely move with no friction role, so that the output shaft (5) can rotate freely, the left friction plate (33) and right friction plate (32) can be in the fixed or unfixed state, forming the function that reduces friction and resistance.

Description

A kind of outage friction brake

Technical field

Outage friction brake of the present utility model is the important mechanical part of a class, can be widely used in the outage of various needs such as production line, metallurgy, chemical industry, light industry, lathe, automobile and stop and guaranteeing that machine outage back associated mechanisms is in the machinery of settling position.

Background technique

Mechanical brake is meant under certain operation control action, makes stopping or decelerate and keep a certain relative position motionless of machine.The mode of braking has multiple: 1 dynamic braking such as generator brake, is converted into electric energy with mechanical energy; 2 electromagnetic brakings are converted into electromagnetic energy with mechanical energy; 3 friction catches such as braking automobile, are transformed into heat energy with mechanical energy after friction; The mode of operational brake also has multiple, has plenty of by mechanical mechanism controls, has plenty of by electrical signal control, has plenty of by hydraulic control.Break for electrical signal control is divided into energising braking and power-off brake again.

Existing power-off braker main structure is to push down fixing friction plate by an intermediate compression spring when outage, thereby under the effect of frictional force, make braking plate deceleration or motionless, this structure requires the number of active coils of spring few in order to reduce boundary dimension, big in order to obtain bigger required braking force spring rate, but this class power-off braker generally is to be in off-position for a long time, spring is in compression for a long time, in order to ensure good braking ability, the material of spring and heat treatment and manufacturing process just there are high requirement, cause cost of production to raise.On the other hand, friction plate is in stationary state and break when not braking, and just there is bigger non-load friction resistance in the braking plate of high speed rotating.

Certainly, different application places has different requirements to break.For the machinery that hoists, when outage, reliable braking must be arranged, national security rules regulation gravity and spring force can be used as the braking force of the machinery that hoists.Declutch and the break of power-off brake so being applied to energising in the machinery that much hoists, what braking surface had a plane also has a conical surface.Especially on the direct current drive capstan winch, because its general requirement is that level is dilatory, so its braking system employing is mechanical self-latching mechanism, the braking force of this break depends on external force.

Summary of the invention

The utility model patent to solve above-mentioned power-off braker boundary dimension big, to problems such as spring requirement height, unloaded resistance are big, make every effort to explore a kind of power-off braker brand-new, that simplify the internal structure of an organization.

The technological scheme of the utility model research comprises following two big parts: the one, and the electromagnetic system that air gap is adjustable; The 2nd, friction plate can be converted into the friction system of antifriction sheet; And friction twitch-up is again the part of electromagnetic system magnetic circuit, and friction spring adopts a plurality of little springs to substitute a big spring, increases the effective active length of spring, simplified structure.By the break-make of electricity of control electromagnetic system, friction system compresses or unclamps, and turns round or brakes.On the other hand, by also can strengthen the braking moment of break to the combination increase of braking plate and friction plate.

Each component of the utility model product are all through being to satisfy above-mentioned performance requirement after the detailed calculated comparatively, and component are few, volume is little, in light weight, to adopt new technology in a large number, new material, new method, cost is low, through advanced development and trial run, superior performance is reliable, be applicable to the direct current drive capstan winch after, the function of electric capstan by only can level dilatory widenable to vertically hoisting.

Description of drawings

Fig. 1 is the utility model general assembly sketch;

Be labeled as among the figure: 1 rear end cover; 2 electromagnetic systems; 21 stretching screws; 22 push screw open; Ring in 23; 24 base plates; 25 coils; 26 pressing plates; 27 casings; 3 friction braking systems; 31 keep plates; 32 right friction plates; 33 left friction plates; 34 stage clips; 4 front covers; 5 output shafts.

Embodiment

Outage friction brake of the present utility model, as shown in Figure 1, electromagnetic system 2 is made up of base plate 24, casing 27, pressing plate 26, interior ring 23, brake coil 25, and there is the gap in pressing plate 26 in the axial direction with interior ring 23.Friction braking system 3 is made up of keep plate 31, right friction plate 32, left friction plate 33, stage clip 34, front cover 4, pressing plate 26, output shaft 5, because of the annulus foreign side of stage clip 34 at brake coil, quantity can increase a plurality of, and its axial dimension also can extend greatly, increases number of active coils.Front cover 4, casing 27, rear end cover 1 are formed seal chamber with output shaft 5.When outage, electromagnetic system does not have magnetic induction, and pressing plate 26 compresses left friction plate 33, keep plate 31, right friction plate 32 and front cover 4 under the effect of stage clip 34, and keep plate 31 is made firmly motionless under frictional force action, and is motionless thereby output shaft 5 is prevented.When energising, electromagnetic system 2 produces magnetic fields, and interior ring 23 is at stretching screw 21 and push open under screw 22 effects motionlessly, and pressing plate 26 will inwardly be inhaled by magnetic field and encircle 23, thereby compression press spring 34, just unclamp left friction plate 33, keep plate 31, right friction plate 32, keep plate 31 does not have frictional force action free to rotate yet, thereby output shaft 5 is free to rotate, and, this moment, left friction plate 33 and right friction plate 32 all can be in moving and motionless state, formed the antifriction function, reduced unloaded resistance.

As shown in Figure 1, when left friction plate 33, keep plate 31, right friction plate 32 and pressing plate 26 wear and tear along with the growth of operating time, cause the axial clearance of 23 on pressing plate 26 and interior ring to strengthen, the magnetic circuit gap is strengthened, and this moment is by adjusting stretching screw 21 and pushing screw 22 adjustable seamless plates 26 open and the axial clearance of 23 on interior ring directly causes break energy reliably working.

The present invention fully adopts suitable mass production processes technology such as aluminium die casting, stamping part, and the product model machine is tentatively finished and by test, all kinds of Mold Makings are also finished, and has now entered the small lot test manufacture.

Claims (2)

1, a kind of outage friction brake, it comprises rear end cover (1), electromagnetic system (2), base plate (24), casing (27), pressing plate (26), interior ring (23), brake coil (25), friction braking system (3), keep plate (31), right friction plate (32), left side friction plate (33), stage clip (34), front cover (4), and output shaft (5), it is characterized in that: stage clip (34) is positioned at the annulus foreign side of brake coil (25), during outage, keep plate (31) is in stage clip (34), pressing plate (26), right friction plate (32), system is firmly motionless down for left side friction plate (33) frictional force action, and is motionless thereby output shaft (5) is prevented.During energising, electromagnetic system (2) produces magnetic field, pressing plate (26) will be inhaled inwardly ring (23) by magnetic field, keep plate (31) does not have frictional force action free to rotate, thereby output shaft (5) is free to rotate, left side friction plate 33 and right friction plate (32) all can be in moving and motionless state, form the antifriction function, reduce unloaded resistance.

2, outage friction brake as claimed in claim 1 is characterized in that: the axial clearance between pressing plate (26) and interior ring (23) can be adjusted.

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