CN1888461A

CN1888461A - Electricity loss brake

Info

Publication number: CN1888461A
Application number: CN 200610041043
Authority: CN
Inventors: 顾建平; 章建明; 蔡志强
Original assignee: MAIYE ELECTROMAGNETIC CONTROL COMPONENTS CO Ltd CHANGSHU CITY
Current assignee: MAIYE ELECTROMAGNETIC CONTROL COMPONENTS CO Ltd CHANGSHU CITY
Priority date: 2006-07-17
Filing date: 2006-07-17
Publication date: 2007-01-03
Anticipated expiration: 2026-07-17
Also published as: CN100404905C

Abstract

A brake for a hoist, a reaming mill, an electric block and the like includes a magnetic yoke having a boss in its cavity with a spring hole in the centre of the boss; a magnet coil in its seat cavity, whose outlet end connected with the power circuit; a spring, whose one end is held in the spring hole and the other end extends outside the spring hole; an armature in the cavity of the magnetic yoke being in contact with the spring; a friction plate on the armature with a coupled axle block hole in the centre; a coupled axle block disposed in its hole and a fixing screw disposed in the fixing screw hole.

Description

Power-off brake

Technical field

The present invention relates to a kind of power-off brake, the power-off brake on particularly a kind of device that is used for crane, strand grinding machine, electric wire hoist and so on.

Background technique

In prior art, adopt contracting brake on the device for crane, strand grinding machine, electric wire hoist and so on all stereotypedly, this structure example as, the difunctional break of normally-open normally-close that Chinese patent notice of authorization CN2146469Y is disclosed, and for example, the hydraulic contracting block brake that disclosed of Chinese patent notice of authorization CN2271524Y.Especially, for the electric wire hoist overhead hoist or claim crane to adopt band brake type to seem more to there is no need because, since the electric wire hoist overhead hoist at the tonnage of handling thing often less, the power of device proper is also less.

As if known, the structure of contracting brake is generally comparatively complicated, and also is difficult to simplify.In above-mentioned two patents mentioning the former is by pedestal, supporting structure assembly, pusher, a pair of lever, link, a pair of brake arm, a pair of spring seat, a pair of spring, clearance adjustment mechanism, be located at supporting structure assembly between pusher and the brake arm, be located at the driving mechanism that is used to make break be normally open of a pair of brake arm top etc.; The latter comprises fuel tank, oil hydraulic cylinder, main support arm, spring, a pair of secondary support arm, pull bar, underframe, brake rubber block frame and brake rubber block.The break of making this class formation consumes not only that the material of getting is a lot of, the process-cycle is long, the Installation and Debugging maintaining is loaded down with trivial details, and the braking effect of band-type brake block brake also is unsatisfactory, because it can not embody and the comprehensive obvolvent of the Brake drum of speed reducer, but only have an effect with Brake drum by the corresponding position (branch) of two pieces of brake shoes, therefore little, retro-speed of obvolvent area and effect are not good enough, lack Security.

The claimant is before the technological scheme that proposes the application, also check the disclosed power-off brake of China Patent No. ZL93237869.3 and checked the application number of filing an application by the claimant equally to be respectively 200520078128.6 (electromagnetic brakes) and 200520140270.9 (improving the electromagnetic brake of structure) structure, though slightly use for reference part, but, because the applicable object of this break is a textile manufacturing machine, the specific aim of application is stronger, therefore if it directly or is slightly changed, then be to satisfy to be applied to crane, electric wire hoist, usage requirement on the device of strand grinding machine and so on.

Summary of the invention

Task of the present invention be to provide that a kind of component number is few, installation and processing debugging maintenance work amount is little, can enlarge braking surface effectively and guarantee safe power-off brake.

Task of the present invention is finished like this, a kind of power-off brake, it comprises: yoke 1, the cavity central position of this yoke 1 has extended boss 11, boss 11 central authorities have a spring eye 111, are equipped with one corresponding to the base portion of spring eye 111 and adjust screw 112, and the chamber wall of the cavity of yoke 1 is the narrow armature seat ring 14 that shortened into of portion on the lower side, the chamber wall on the upper side portion with a cloth state extended one group of location bead 13, constitute electromagnetic wire ring support chamber 12 between location bead 13 and the armature seat ring 14; One electromagnetic coil 2 is located in the described electromagnetic wire ring support chamber 12, and the outlet terminal 21 of electromagnetic coil 2 is connected with power circuit after passing and being preset in 1 fairlead 15 corresponding to 12 positions, electromagnetic wire ring support chamber of yoke; One spring, 3, one ends are contained in the spring eye 111, and contact with adjusting screw 112, and the other end is stretched in outside the spring eye 111; One armature 4 is located in the cavity of yoke 1, contact with spring 3, and the side central authorities tool cavity 41 of armature 4 is provided with groove 42 between all around, groove 42 with locate bead 13 and match; One friction plate 5 is stacked and placed on the armature 4, central tool axle connecting block hole 51; One connecting shaft piece 6 is arranged in the axle connecting block hole 51, and the fixing screw hole 61 that central authorities and sidepiece offer axis hole 62 respectively and connect with axis hole 62 is equipped with set screw 611 on the fixing screw hole 61.

The outer wall of yoke 1 of the present invention has extended and has installed and fixed bead 16, installs and fixes to offer fixed hole 161 on the bead 16, is equipped with screw 1611 on the fixed hole 161.

The bead 16 that installs and fixes of the present invention has three at least, equidistantly distributes each other.

The last plane of location of the present invention seat ring 14 is mutually concordant with the end face of boss 11 substantially.

The quantity of location of the present invention bead 13 has three at least, equidistantly distributes each other, and the quantity of the groove 42 on the described armature 4 equates that with the quantity of location bead 13 spacing is consistent with the spacing between the bead 13 of location.

The width of location of the present invention bead 13 and thickness are corresponding to the groove depth and the groove height of groove 42.

Cavity 41 of the present invention be shaped as basin shape chamber.

The hole shape of axle connecting block hole 51 of the present invention is a rectangular opening, and the size in hole and connecting shaft piece 6 are suitable.

Rectangular opening of the present invention is a square hole.

Connecting shaft piece 6 of the present invention is a rectangular block, and described rectangular block is a square body.

The power-off brake that the present invention recommends is only by six parts, so structure is uncomplicated, very helps processing and assembling; Can contact with the Brake drum integral body of crane, strand grinding machine, electric wire hoist and so on by a side surface of friction plate 5, so braking surface is big, braking effect is improved.

Description of drawings

Fig. 1 is one embodiment of the invention assembling assumption diagram.

Fig. 2 is an application example figure of the present invention.

Embodiment

In Fig. 1, yoke 1 is cylindrical on the whole, the location bead of the armature seat ring 14 of the chamber wall Lower Half of the boss 11 of the cavity central authorities of yoke 1 and cavity and the chamber wall first half of cavity 13 also have on the outer wall to install and fix bead 16 integrally formed when all being shaped with yoke 1.Among the figure, install and fix bead 16 though provided four location beads 13 and four, but be not subjected to this limit, if five or six, so also be desirable, according to actual conditions, preferred quantity is 3-6, and preferably will locate bead 13 and be arranged in, or claim to be arranged on the position to correspond to each other with installing and fixing bead 16.Electromagnetic coil 2 is contained between the wall body of boss 11 and armature seat ring 14 in the formed electromagnetic wire ring support chamber 12 just, and a pair of outlet terminal 21 of electromagnetic coil 2 causes power circuit and connects by being opened in fairlead 15 on the yoke 1.One end of spring 3 is arranged in the spring eye 111 of boss 11 central authorities, because the bottom of spring eye 111 is formed with step 1111 (see figure 2)s, therefore, the adjustment screw 112 that is provided in spring eye 111 base portions can be spacing by this step 1111, suitable or contrary tuning put in order screw 112, the active force of spring 3 is changed, that is to say that adjusting screw 112 is the active forces that are used for adjusting spring 3, the other end of spring 3 extends in outside the spring eye 111.With location status shown in Figure 1 is example, the right flank fovea centralis of armature 4 is set as the cavity 41 of a basin shape, on the one hand, the cavity 41 of this basin shape can be used for the corresponding convex portion of friction compensation sheet 5 central authorities, on the other hand, because the back side of cavity 41 constitutes protruding part, and the surface of this protruding part can be amplexiformed mutually with the surface of boss 11 just and touched, and contact with spring 3, thereby the position all around of armature 4 is not directly contacted with electromagnetic coil 2.Around the armature 4 between institute the quantity of groove 42 of cloth should be to equate with the quantity of locating bead 13, and, preferably will locate bead 13 is processed into and slightly becomes the dovetail bead, suitably groove 42 is processed into dovetail groove with it, can makes the setting of armature 4 in the cavity of yoke 1 embody comparatively ultimate attainment effect like this.As described above, groove depth, the groove width to groove 42 should be corresponding to thickness, the width of location bead 13.Friction plate 5 is stacked and placed on the armature 4, and material preferably adopts wear-resisting bakelite, and the connecting shaft piece 6 of square body is embedded in being similarly in the foursquare axle connecting block hole 51 on the friction plate 5.Be necessary explanation, the size of axle connecting block hole 51 should be consistent with connecting shaft piece 6.The axis hole 62 of connecting shaft piece 6 central authorities is to be used for linking for brake axle 81 (see figure 2)s with the speed reducer 8 of the power mechanism of crane, strand grinding machine, electric wire hoist and so on.

The claimant narrates application of the present invention in conjunction with Fig. 2, this figure has illustrated the power mechanism of electric wire hoist overhead hoist, power mechanism comprise motor 7 and with matched speed reducer 8 of motor 7 and the capstan winch 9 that connects with speed reducer 8, the brake axle 81 of speed reducer 8 extends in the axis hole 62 on connecting shaft piece 6, and fix with set screw 611, be connected with of the present invention thereby finished power mechanism.When electric wire hoist is in normal working state, by adhesive, spring 3 is in compressive state because it is electric that electromagnetic coil 2 gets, and armature 4 overcomes the active force of spring 3, produce the gap between the wall body 82 of friction plate 5 and speed reducer 8, promptly friction plate 5 does not contact with the wall body 82 of speed reducer 8; In case and end-of-job or prominent in the course of the work the chance have a power failure, so, electromagnetic coil 2 dead electricity, the spring 3 that before had been compressed is replied, promote armature 4, is displacement by armature 4 compressing friction plates 5 towards wall body 82 speed, makes the surface of friction plate 5 be closely attached on a side surface of the wall body 82 of speed reducer 8, finishes braking.

Reached the electric wire hoist overhead hoist though the foregoing description is only lifted, because the application feature of the strand grinding machine that various cranes that use in the place of industrial and mining enterprise, harbour and so on and power construction are used etc. duplicates, so the claimant is no longer given unnecessary details.

In a word, the present invention becomes traditional contracting brake and is power-off brake, and the technique effect that is brought is able to be confirmed by above-mentioned explanation.

Claims

1, a kind of power-off brake, it is characterized in that it comprises: yoke (1), the cavity central position of this yoke (1) has extended boss (11), boss (11) central authorities have a spring eye (111), base portion corresponding to spring eye (111) is equipped with an adjustment screw (112), the chamber wall of the cavity of yoke (1) is the narrow armature seat ring (14) that shortened into of portion on the lower side, the chamber wall on the upper side portion with a cloth state extended one group of location bead (13), constitute electromagnetic wire ring support chamber (12) between location bead (13) and the armature seat ring (14); One electromagnetic coil (2) is located in the described electromagnetic wire ring support chamber (12), the outlet terminal (21) of electromagnetic coil (2) pass be preset in yoke (1) be connected with power circuit corresponding to the fairlead (15) at position, electromagnetic wire ring support chamber (12) back; One spring (3), an end are contained in the spring eye (111), and contact with adjusting screw (112), and the other end is stretched in outside the spring eye (111); One armature (4) is located in the cavity of yoke (1), contact with spring (3), and the side central authorities tool cavity (41) of armature (4) is provided with groove (42) between all around, groove (42) with locate bead (13) and match; One friction plate (5) is stacked and placed on the armature (4) central tool axle connecting block hole (51); One connecting shaft piece (6) is arranged in the axle connecting block hole (51), and the fixing screw hole (61) that central authorities and sidepiece offer axis hole (62) respectively and connect with axis hole (62) is equipped with set screw (611) on the fixing screw hole (61).

2, power-off brake according to claim 1, the outer wall that it is characterized in that described yoke (1) has extended and has installed and fixed bead (16), installs and fixes and offers fixed hole (161) on the bead (16), is equipped with screw (1611) on the fixed hole (161).

3, power-off brake according to claim 2 is characterized in that the described bead (16) that installs and fixes has three at least, equidistantly distributes each other.

4, power-off brake according to claim 1 is characterized in that the last plane of described location seat ring (14) is mutually concordant with the end face of boss (11) substantially.

5, power-off brake according to claim 1, the quantity that it is characterized in that described location bead (13) has three at least, equidistantly distribute each other, the quantity of the groove (42) on the described armature (4) equates that with the quantity of location bead (13) spacing is consistent with the spacing between the location bead (13).

6, power-off brake according to claim 1 or 5 is characterized in that the width of described location bead (13) and thickness are corresponding to the groove depth and the groove height of groove (42).

7, power-off brake according to claim 1, what it is characterized in that described cavity (41) is shaped as basin shape chamber.

8, power-off brake according to claim 1, the hole shape that it is characterized in that described axle connecting block hole (51) is a rectangular opening, the size in hole and connecting shaft piece (6) are suitable.

9, power-off brake according to claim 8 is characterized in that described rectangular opening is a square hole.

10, power-off brake according to claim 1 is characterized in that described connecting shaft piece (6) is a rectangular block, and described rectangular block is a square body.