ITFI20090265A1 - ELASTIC REMOVAL DEVICE FOR DISC BRAKES - Google Patents

ELASTIC REMOVAL DEVICE FOR DISC BRAKES Download PDF

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Publication number
ITFI20090265A1
ITFI20090265A1 IT000265A ITFI20090265A ITFI20090265A1 IT FI20090265 A1 ITFI20090265 A1 IT FI20090265A1 IT 000265 A IT000265 A IT 000265A IT FI20090265 A ITFI20090265 A IT FI20090265A IT FI20090265 A1 ITFI20090265 A1 IT FI20090265A1
Authority
IT
Italy
Prior art keywords
springs
arch
plates
disc
intended
Prior art date
Application number
IT000265A
Other languages
Italian (it)
Inventor
Andrea Becocci
Original Assignee
Formula Srl
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 Formula Srl filed Critical Formula Srl
Priority to ITFI2009A000265A priority Critical patent/IT1397864B1/en
Publication of ITFI20090265A1 publication Critical patent/ITFI20090265A1/en
Application granted granted Critical
Publication of IT1397864B1 publication Critical patent/IT1397864B1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00Parts or details
    • F16D65/02Braking members; Mounting thereof
    • F16D65/04Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • F16D65/095Pivots or supporting members therefor
    • F16D65/097Resilient means interposed between pads and supporting members or other brake parts

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Description

"DISPOSITIVO ELASTICO DI DISTACCO PER PASTICCHE DI FRENI A "ELASTIC RELEASE DEVICE FOR BRAKE PADS A

DISCO " DISK "

Il trovato riguarda un dispositivo utilizzato nei freni idraulici a disco per tenere le pasticche accostate ai pistoni in modo che durante l'utilizzo le stesse non sfreghino sul disco. The invention relates to a device used in hydraulic disc brakes to keep the pads close to the pistons so that they do not rub on the disc during use.

Più in particolare l’invenzione riguarda una molla utilizzata a questo scopo ed agli scopi ulteriori di eliminare i giochi presenti nel freno a disco, ridurre le vibrazioni, e fare in modo che il roll back, ovvero il ritorno del pistone idraulico sia più preciso possibile. More specifically, the invention relates to a spring used for this purpose and for the further purposes of eliminating the play present in the disc brake, reducing vibrations, and making the roll back, that is the return of the hydraulic piston, more precise. possible.

Le molle che sono attualmente presenti sul mercato hanno forme di varia natura concepite per consentire una usura uniforme del materiale di attrito e sono generalmente appoggiate su un placchetta metallica che supporta il materiale di attrito. The springs currently available on the market have various shapes designed to allow uniform wear of the friction material and are generally placed on a metal plate which supports the friction material.

Il limite di usura del materiale di attrito à ̈ dato proprio dallo spessore della molla sporgente dalle placchette. The wear limit of the friction material is given by the thickness of the spring protruding from the plates.

E’ noto che le molla attualmente in commercio, in quanto elementi elastici, non applicano un carico costante durante tutto l’arco di utilizzo delle pasticche e la loro deformazione comporta, a volte, una interferenza tra molla e disco. Generalmente inoltre le molle in commercio, hanno un profilo che partecipa totalmente all'azione di spinta e che comprende un arco superiore con un raggio di curvatura relativamente piccolo che pertanto applica un carico via via crescente durante l’utilizzo. It is known that the springs currently on the market, as elastic elements, do not apply a constant load during the entire period of use of the pads and their deformation sometimes involves interference between the spring and the disc. Furthermore, the springs on the market generally have a profile that participates totally in the thrust action and which includes an upper arch with a relatively small radius of curvature which therefore applies a load gradually increasing during use.

Quando il materiale di attrito à ̈ quasi finito, la molla applica quindi un carico sui pistoni che va ad interferire anche con il “roll back†(aumentandolo) e modificando in questo modo il punto di frenata e quindi il funzionamento dell’impianto stesso. When the friction material is almost finished, the spring then applies a load on the pistons which also interferes with the â € œroll backâ € (increasing it) and thus modifying the braking point and therefore the operation of the system. same.

Con il presente trovato si intende superare gli inconvenienti delle soluzioni già note e di proporre una molla per il distacco delle pasticche in freni a disco che riesca a mantenere il carico applicato alle pasticche il più omogeneo possibile durante tutto l’arco di utilizzo del materiale di attrito. With the present invention it is intended to overcome the drawbacks of the solutions already known and to propose a spring for the detachment of the pads in disc brakes which is able to keep the load applied to the pads as homogeneous as possible during the entire period of use of the material. of friction.

Un ulteriore scopo à ̈ proporre una molla che non interferisca con il roll back, e che rimanga a funzionamento costante sia a pastiglia nuova sia a pastiglia completamente usurata. A further object is to propose a spring which does not interfere with the roll back, and which remains in constant operation both with new pad and with completely worn pad.

A questi scopi si à ̈ pervenuti realizzando una molla secondo una o più delle rivendicazioni allegate. These purposes have been achieved by making a spring according to one or more of the attached claims.

I vantaggi dell’invenzione saranno compresi da ogni tecnico del ramo dalla descrizione che segue e dagli annessi disegni, dati quale esempio non limitativo, nei quali: The advantages of the invention will be understood by every person skilled in the art from the following description and the attached drawings, given as a non-limiting example, in which:

- la fig.1 mostra un esploso di un freno a disco provvisto del dispositivo; - fig. 1 shows an exploded view of a disc brake equipped with the device;

- la fig.2 mostra una vista dall’alto del freno di fig.1 ; - fig.2 shows a top view of the brake of fig.1;

- la fig.3 mostra un dettaglio del dispositivo dell’invenzione; - fig.3 shows a detail of the device of the invention;

Con riferimento ai disegni, à ̈ illustrato un dispositivo 10 secondo l’invenzione. II dispositivo à ̈ utilizzato in un freno idraulico a disco 9 per garantire il distacco delle pasticche successivamente alla frenata ed à ̈ allo scopo interposto tra le rispettive placche metalliche 2 che supportano il materiale d’attrito destinate ad essere accostate ai due lati di un disco 4 per azione della coppia di pistoni 5 agenti sulle placche 2 ai due lati del disco 4. With reference to the drawings, a device 10 according to the invention is illustrated. The device is used in a hydraulic disc brake 9 to ensure the detachment of the pads after braking and is for this purpose interposed between the respective metal plates 2 which support the friction material intended to be placed alongside the two sides of a disc 4 by the action of the pair of pistons 5 acting on the plates 2 on both sides of the disc 4.

Secondo l’invenzione il dispositivo comprende due molle contrapposte 6 accostate tra di loro e agenti sulle placche metalliche 2 che si affacciano sui fianchi del disco 4. According to the invention, the device comprises two opposing springs 6 placed side by side and acting on the metal plates 2 which face the sides of the disc 4.

Preferibilmente, le molle 6 sono molle a tazza o a balestra, costituite ciascuna da una lamina metallica provvista di una traversa 11 sporgente e piegata generalmente a “V†rispetto al piano definito dalla rispettiva placca 2, dalla quale si allungano due lamine 12 destinate ad accostare le placche e profilate per contornare il materiale d’attrito 3. Preferably, the springs 6 are cup or leaf springs, each consisting of a metal sheet provided with a crosspiece 11 protruding and bent generally in a `` V '' shape with respect to the plane defined by the respective plate 2, from which two sheets 12 extend, intended to bring the plates and profiles close together to surround the friction material 3.

Le traverse 11 sono inoltre unite da un elemento intermedio elastico, costituito preferibilmente da un arco 7 portante agli estremi le due balestre 6 e provvisto di un foro 13 per il passaggio di un perno di fissaggio 14 munito di un fermo 16. Vantaggiosamente, il dispositivo comprende un elemento distanziale 8 che mantiene le molle 6 a battuta ad una distanza prefissata in modo tale che l’azione delle balestre 6 sulle placche non risenta dall'azione elastica disuniforme dell’arco 7. The crossbars 11 are also joined by an intermediate elastic element, preferably consisting of an arch 7 bearing the two leaf springs 6 at the ends and provided with a hole 13 for the passage of a fixing pin 14 equipped with a stop 16. Advantageously, the device it comprises a spacer element 8 which keeps the springs 6 abut at a predetermined distance so that the action of the leaf springs 6 on the plates is not affected by the non-uniform elastic action of the arch 7.

A questo scopo, l’arco 7 à ̈ costituito preferibilmente una lamina elastica conformata ad “U†portante agli estremi le due molle agenti sul fianco destro e sinistro del disco 3 e il distanziale 8 à ̈ disposto tra i due rami dell’arco 7 in prossimità delle molle 6 essendo ad esempio ottenuto piegando una linguetta 15 ritagliata dal corpo dell’arco. For this purpose, the arch 7 is preferably constituted by an elastic lamina shaped like a â € œUâ € bearing at the ends the two springs acting on the right and left side of the disc 3 and the spacer 8 is placed between the two branches of the disc 3. Arch 7 near the springs 6 being obtained for example by bending a tab 15 cut out from the body of the arch.

Vantaggiosamente, con la soluzione descritta non tutto il dispositivo 9 partecipa all’azione di spinta ma soltanto le molle 6 disposte al di sotto della linguetta di fermo 15. Advantageously, with the described solution not all of the device 9 participates in the thrust action but only the springs 6 arranged below the stop tab 15.

Di conseguenza, al variare dello spessore del materiale d’attrito 3 l’arco 7 non modifica la propria azione e non influisce sulla spinta del dispositivo sulle placche, con le molle 6 che mantengono la propria spinta uniforme durante l’intera vita del materiale 3 ovvero sia quando presenta lo spessore massimo che quando à ̈ prossimo alla sostituzione. Consequently, as the thickness of the friction material 3 varies, the arch 7 does not change its action and does not affect the thrust of the device on the plates, with the springs 6 maintaining their uniform thrust throughout their entire life. of material 3 or both when it has the maximum thickness and when it is close to replacement.

La presente invenzione à ̈ stata descritta secondo forme preferite di realizzazione ma varianti equivalenti possono essere concepite senza uscire daN'ambito di protezione dell'invenzione. The present invention has been described according to preferred embodiments but equivalent variants can be conceived without departing from the scope of the invention.

Claims (5)

RIVENDICAZIONI 1. Dispositivo per il distacco delle pasticche di freni idraulici a disco atto ad essere interposto tra rispettive placche metalliche contrapposte (2) di supporto di due strati di materiale d’attrito (3) d’attrito destinato ad essere accostato ai due lati di un disco (4) tramite l’azione di pistoni idraulici (5) agenti sulle placche (2), comprendente due molle (6) ciascuna destinata ad essere accostata ad una rispettiva placca (2) ed unite da un arco elastico intermedio (7), caratterizzato dal fatto di comprendere un elemento distanziale (8) tra dette molle (6). CLAIMS 1. Device for the detachment of hydraulic disc brake pads designed to be interposed between respective opposing metal plates (2) supporting two layers of friction material (3) intended to be placed side by side of a disc (4) through the action of hydraulic pistons (5) acting on the plates (2), comprising two springs (6) each intended to be approached to a respective plate (2) and joined by an intermediate elastic arch ( 7), characterized in that it comprises a spacer element (8) between said springs (6). 2. Dispositivo secondo la rivendicazione 1, in cui l’arco (7) comprende una lamina elastica conformata ad “U†portante agli estremi due molle a balestra (6) e detto distanziale (8) à ̈ disposto tra i due rami dell’arco (7) in prossimità delle molle (6). 2. Device according to claim 1, in which the arch (7) comprises an elastic lamina shaped like a â € œUâ € bearing at the ends two leaf springs (6) and said spacer (8) is arranged between the two branches of the arch (7) near the springs (6). 3. Dispositivo secondo la rivendicazione 2 in cui detto distanziale (8) à ̈ una linguetta (15) ricavata dal corpo dell’arco (7). 3. Device according to claim 2 wherein said spacer (8) is a tab (15) obtained from the body of the arch (7). 4. Dispositivo secondo la rivendicazione 2 in cui dette balestre (6) sono provviste di una traversa (11) piegata generalmente a “V" rispetto al piano definito dalla rispettiva placca (2) e di due lamine (12) destinate ad accostare le placche e profilate per contornare il rispettivo strato di materiale d’attrito (3). 4. Device according to claim 2 in which said leaf springs (6) are provided with a cross member (11) bent generally in a "V" shape with respect to the plane defined by the respective plate (2) and with two plates (12) intended to bring the plates and profiles to surround the respective layer of friction material (3). 5. Freno a disco comprendente un dispositivo secondo una delle rivendicazioni precedenti.5. Disc brake comprising a device according to one of the preceding claims.
ITFI2009A000265A 2009-12-17 2009-12-17 ELASTIC REMOVAL DEVICE FOR DISC BRAKES IT1397864B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ITFI2009A000265A IT1397864B1 (en) 2009-12-17 2009-12-17 ELASTIC REMOVAL DEVICE FOR DISC BRAKES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITFI2009A000265A IT1397864B1 (en) 2009-12-17 2009-12-17 ELASTIC REMOVAL DEVICE FOR DISC BRAKES

Publications (2)

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ITFI20090265A1 true ITFI20090265A1 (en) 2011-06-18
IT1397864B1 IT1397864B1 (en) 2013-02-04

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425523A (en) * 1967-06-12 1969-02-04 Kelsey Hayes Co Ventilated rotor with vibration dampener
DE2538475A1 (en) * 1975-08-29 1977-03-03 Teves Gmbh Alfred Disc brake with acoustic wear indication - has spring engaging disc periphery after wear exceeds maximum
WO1996008663A1 (en) * 1994-09-13 1996-03-21 Kelsey Hayes Company Disc brake shoe retraction mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425523A (en) * 1967-06-12 1969-02-04 Kelsey Hayes Co Ventilated rotor with vibration dampener
DE2538475A1 (en) * 1975-08-29 1977-03-03 Teves Gmbh Alfred Disc brake with acoustic wear indication - has spring engaging disc periphery after wear exceeds maximum
WO1996008663A1 (en) * 1994-09-13 1996-03-21 Kelsey Hayes Company Disc brake shoe retraction mechanism

Also Published As

Publication number Publication date
IT1397864B1 (en) 2013-02-04

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