CN2198445Y - Elastic adhesive brake shoe of heavy machinery - Google Patents

Abstract

The utility model relates to an elastic adhesive brake shoe of a heavy machinery clutch and a braking device. A friction block and the brake shoe plate are firmly adhibited together. The existing riveted connection type brake shoe which is widely used in the heavy mechanism industry can be replaced. The elastic adhesive brake shoe adopts an adhesive way instead of riveting, in which the abrasion of the friction block is reduced to the thinnest limit. The lifespan of the elastic adhesive brake shoe is over twice as long as that of the riveted connection type brake shoe, and manufacturing steps are reduced. For the elastic adhesive brake shoe, owing to that a layer of rubber is stuck between the brake shoe plate and the friction block, mechanical shock and bonding plane displacement created by thermal expansion during the work of the brake shoe are absorbed. The disadvantages of causing cracks and falling of the friction block are eliminated. The friction block of the elastic adhesive brake shoe and the brake shoe plate are solidly combined and homogeneously compressed; the noise is reduced, and the work is stable and reliable (for the elastic adhesive brake shoe, molding compound can be compressed and stuck on the brake shoe plate together with the compression of the friction block, or the friction block and the brake shoe plate which are compressed can be stuck together in two steps).

Description

Elastic adhesive brake shoe of heavy machinery

The utility model relates to the manufacturing of heavy machinery clutch and braking device usefulness brake shoe.

Main part clutch of heavy machinery transmission and braking device with the manufacture process and the main manufacture methods of brake shoe are at present: 1, brake pad is to be formed by fractional material factory's compacting with the compression molding material that multiple friction material and auxiliary material prepare, and (compression molding material is promptly suppressed the blending material of brake pad) its operation is: batching, hot pressing, surperficial milling processing; 2, the brake shoe sheet is a metallic article, is made by machine-processed factory; 3, machine-processed factory rivets into brake shoe with the brake pad of buying back with homemade brake shoe sheet with the user, and operation is: brake shoe sheet compacting, the brake shoe sheet that suppresses become brake shoe with aluminium or copper rivet after with the brake pad drilling.The thinner thickness of brake pad.For rivet can be riveted together brake pad with the brake shoe sheet securely, brake pad left 1/3 thickness and bears the rivet pulling force when rivet hole bore to be installed, rivet head has accounted for 1/3 of brake pad thickness again, and the only remaining 1/3(of the thickness that brake pad energy actual wear is used sees accompanying drawing 1).It is because of being when brake pad may wear to rivet head, aluminium or copper rivet are subjected to fricative high temperature to become melting welding shape slug to stick in the friction member surface, reaction is drawn brake pad and is worn into channel form, needs in time more to renew brake shoe, and the used thickness of brake shoe is less than 40% of the brake pad total thickness.Produce the gap between its brake pad of brake shoe of riveted joint and brake shoe sheet, rubbing surface is stressed irregular, and causes mechanical shock.Brake shoe heavy machinery use wide, consumption is big, is example with certain ore deposit machine, every needs surplus the dress brake shoe 500 piece, the whole nation has thousand approximately in work, surplus the meter dress brake shoe 50 ten thousand, brake shoe main part brake pad thickness only uses about 1/3 just needs left alone without help machine to change.This ore deposit machine manufactory and user need be equipped with the work that manpower equipment is engaged in the riveted joint brake shoe, and it is like this substantially to be extrapolated in other heavy machinery transmission of the whole nation manufacturing use condition of brake shoe, directly and potential loss very serious.For this reason, for many years, machine-processed industry once dropped into the bonding work of certain human and material resources development brake shoe, but failed so far.Its main cause is: the aforementioned adhesion type brake shoe of developing all adopts firm fragility bonding method.The rapid frictional heating of meeting when the machine high-speed overload turns round, asbestos material system brake pad is different with metallic material check tile material, and thermal coefficient of expansion differs.Brake shoe adstante febre, brake pad and brake shoe sheet produce the bonding plane displacement and crackle occurs and enlarge thereupon causing that brake pad comes off because of heat expansion is not of uniform size.Just the fragility adhesive layer also very easily cracks under the powerful vibrations of machinery and causes brake pad and come off in addition.

Order of the present utility model ground is that a kind of adhesion type brake shoe will be provided, be used for heavy machinery clutch and braking device, and can satisfy the heavy machinery working condition requirement fully, to replace traditional riveted joint type brake shoe, the used thickness that it can make brake pad is brought up to more than 90% by original 30%, alleviate mechanical shock, make transmission stressed evenly, and the manufacturing process of reduction brake shoe.

The purpose of the utility model (scheme 1) is achieved in that a kind of heavy machinery clutch and braking device elastic adhesive type brake shoe, form by friction material system brake pad and the applying of metallic material check tile, it is characterized in that brake pad and brake shoe sheet form with elastic material is bonding, so-called elastic material is bonding to be to glue into one deck rubber between brake pad and brake shoe sheet.

The purpose of the utility model (scheme 2) is achieved in that a kind of heavy machinery clutch and braking device elastic adhesive type brake shoe, form by friction material system brake pad and the applying of metallic material check tile, it is characterized in that: in the compression molding material compacting brake pad for preparing, just compression molding material is pressed to be bonded on the metal to-metal brake tile that posts elastic material-rubber layer in advance.

Adopt the bonding brake shoe that forms of the utility model (scheme 1), in response to having used the elastic adhesive technology, it absorbs preferably or has eliminated shoe plate assembly heat expansion and mechanical shock power, has stopped brake shoe bonding plane crack and has caused the drawback that brake pad comes off, and heavy machinery is achieved with the adhesion type brake shoe.Bring up to 90% the use of brake pad is thick, is doubled the working life of brake shoe.

Adopt the utility model (scheme 2) once to press the sticking brake shoe that forms except that having (scheme 1) over-all properties, in addition the reason fractional material factory is produced many factories multiple working procedure production that brake pad, machine-processed factory produce the brake shoe sheet with the user and rivet into brake shoe and be reduced to several operation of a factory and produce, reached and not only improved brake shoe working life but also reduced the dual order ground of making link.The factory of the former piece that creates friction is if adopt the utility model scheme, and the order of then receiving no longer is a brake pad, but by brake pad with the bonding brake shoe product that forms of brake shoe sheet; For the user, (referring to engineering works and machine customer) can directly be subscribed to the brake shoe product, saves riveted joint or bonding process.This (scheme 1) and (scheme 2) bonding brake shoe that forms, fit between its brake pad and brake shoe sheet tight, tight, work is stressed evenly, steady reliably, at the bottom of the noise.The more important thing is the working life of having improved brake shoe, reduced left alone without help probability, fallen at the end manufacturing and maintenance expenses.

Below in conjunction with accompanying drawing the utility model (scheme 1) and (scheme 2) are described further:

Fig. 1 and Fig. 2 are the riveted joint type brake shoes that existing structure and technology are produced.

Fig. 3 and Fig. 4 are the structure of the utility model (scheme 1) and (scheme 2) and the adhesion type brake shoe that technology is produced.(1), brake shoe sheet among the figure; (2), brake pad; (3), elastic adhesive layer; (4), aluminium or copper rivet.

Referring to Fig. 1 and Fig. 2, brake pad (2) becomes brake shoe with brake shoe sheet (1) with rivet after processing the binding face of itself and brake shoe sheet through milling. The brake pad thickness of this brake shoe is 5 millimeters, and Fig. 1 shows that effective used thickness of brake pad in the prior art (2) for less than 40%, can analyze in addition, after the riveted joint, because brake pad is subjected to pressure irregular, must between brake pad and brake shoe sheet, produce the gap, stressed irregular and generation vibrations during machine run.

Referring to Fig. 3 and Fig. 4, (1) and (2) through bonding, no rivet in (2), and can reach more than 90% of thickness own the service life of (2), above the service life of prior art; (3) be adhesive linkage with rubber, have elasticity, realized the cementability that brake pad and brake shoe sheet are good, eliminated mechanical shock and brake shoe heat expansion and changed destruction to adhesive strength, satisfy mechanical bad working environments to the requirement of brake shoe.

For two example two the utility model (scheme 1) and (scheme 2) are further described again below.

Embodiment 1, enchashment has 1 on the metal to-metal brake tile that machinery plant makes, the degreasing and rust removal processing that descales is carried out on the surface of need adhesive friction piece, method is sandblast, shot-peening, pickling all can, on the face of cleaning out, brush polyisocyanate fat glue one time then, repave the butyronitrile rubber sheet of about 0.8 millimeters thick, but also brushing one deck butyronitrile rubber slurry (need treat in the rubber cement can to carry out next procedure when volatile solvent evaporates into rubber cement naturally and is half curdled appearance as the brushing rubber cement) produces the fractional material factory brake pad product then and is placed on the hot pressing die of packing on the brake shoe sheet and carries out hot-press solidifying cost (scheme 1) brake shoe product.

Embodiment 2, by behind the surface treatment of 1 pair of brake shoe sheet of embodiment, coating viscosity glue, subsides rubber layer or the brushing rubber cement brake shoe sheet being put into the hot pressing facility, add deployed compression molding material carry out behind the hot-press solidifying the brake shoe product (this later process is with the method for the brake pad of fractional material factory's compacting now) of the utility model (scheme 2).For the brake shoe of various working condition requirements, only need to require to increase the various additives of compression molding material, or say the prescription of modulation compression molding material according to usability, can similarly press and glue this routine described brake shoe product.

8 brake shoes by present embodiment 1 and embodiment's 2 each compacting are tested through being installed on the heavy machinery clutch, 600 horsepowers of transmitted powers, the utility model brake shoe is connected with a pneumatic tyre, by pneumatic tyre thrust with the friction member obvolvent that rubs, (this bad working environments reality does not exist) the utility model brake shoe punctures explosion with the fricative high temperature of friction member with the link pneumatic tyre because of frequent on-load when reaching 43 times through opening air cock repeatedly, but the utility model brake shoe-brake shoe sheet and brake pad applying intensity are harmless.

Claims (2)

1, a kind of heavy machinery clutch and braking device elastic adhesive type brake shoe, form by friction material system brake pad and the applying of metallic material check tile, it is characterized in that: brake pad and brake shoe sheet form with elastic material is bonding, and so-called elastic material is bonding to be to glue into one deck rubber between brake pad and brake shoe sheet.

2, a kind of heavy machinery clutch and braking device elastic adhesive type brake shoe, form by friction material system brake pad and the applying of metallic material check tile, it is characterized in that: in the compression molding material compacting brake pad for preparing, just compression molding material is pressed to be bonded on the metal to-metal brake tile that posts elastic material-rubber layer in advance.

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