HRP920751A2 - Vacuum power-assisted brake servo - Google Patents
Vacuum power-assisted brake servo Download PDFInfo
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- HRP920751A2 HRP920751A2 HR920751A HRP920751A HRP920751A2 HR P920751 A2 HRP920751 A2 HR P920751A2 HR 920751 A HR920751 A HR 920751A HR P920751 A HRP920751 A HR P920751A HR P920751 A2 HRP920751 A2 HR P920751A2
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- 238000009826 distribution Methods 0.000 claims description 2
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- 238000004519 manufacturing process Methods 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000000284 resting effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910003296 Ni-Mo Inorganic materials 0.000 description 1
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- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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Description
Grana tehnike u koju spada pronalazak The branch of technology to which the invention belongs
Izum spada u oblast upravljanja kočnicama za vozila, a posebno se odnosi na prijenos sile kočenja sa uređaja za upravljanje na elemente koji neposredno obavljaju kočenje. Oznaka prema Međunarodnoj klasifikaciji patenata B60T 13/56. The invention belongs to the field of vehicle brake control, and in particular relates to the transmission of braking force from the control device to the elements that directly perform braking. Designation according to the International Classification of Patents B60T 13/56.
Tehnički problem Technical problem
Izumom se rješava problem kako konstrukcijski izvesti dvokomorni servomotor sa vakumskim pojačivačem sile kočenja kod motornih vozila, pojednostavljenje konstrukcije, kod koje sklop klipa i klip ventila automatski zauzimaju položaje mirovanja, koji su samougodivi, kako bi se potpuno otklonio mrtvi hod u servomotoru, tj. sveo na nulu. The invention solves the problem of how to design a two-chamber servo motor with a vacuum booster for motor vehicles, simplifying the structure, where the piston assembly and the valve piston automatically take up their rest positions, which are self-satisfying, in order to completely eliminate dead travel in the servo motor, i.e. to zero.
Stanje tehnike State of the art
Jedan servomotor ove vrste opisan je u francuskom patentnom spisu FR-A-1, 549,121. U servomotoru, opisanom u navedenom spisu, položaj mirovanja sklopa klipa određen je kad ovaj dođe u dodir sa zadnjom kućišta. Položaj mirovanja klipa ventila određen je jednim klinom ugrađenim radijalno u glavčinu sklopa klipa. Kao rezultat toga, mrtvi hod aktiviranja servomotora (to je zračnost koja u stanju mirovanja postoji između ventila i nepokretnog sjedišta ventila) ne može se smanjiti na neku vrlo malu vrijednost, uzimajući u obzir lanac proizvodnih dimenzija i tolerancija i potrebu da se osigura, za vrijeme faze kada je kočenje otpušteno, jedan otvor između ventila i fiksnog, nepokretnog sjedišta ventila, kako bi se omogućilo pravilno oslobađanje zadnje komore od pritisaka. One servomotor of this type is described in French patent document FR-A-1, 549,121. In the servomotor, described in the mentioned document, the resting position of the piston assembly is determined when it comes into contact with the rear housing. The rest position of the valve piston is determined by a pin installed radially in the hub of the piston assembly. As a result, the dead travel of the actuator actuation (that is the clearance that exists between the valve and the stationary valve seat at rest) cannot be reduced to some very small value, taking into account the chain of manufacturing dimensions and tolerances and the need to ensure, during stages when the brake is released, one opening between the valve and the fixed, immovable valve seat, to allow proper release of the rear chamber pressures.
U američkom patentnom spisu US-A-4, 358,990 položaj mirovanja sklopa klipa također je određen njegovim dolaženjem u dodir sa zadnjom školjkom kućišta, a položaj mirovanja klipa ventila je u stvari određen jednim osloncem koji se predviđen na sipki za aktiviranje i koji sudjeluje sa jednim zadnjim nastavkom, produženjem zadnje školjke kućišta. Da bi se omogućilo ugađanje mrtvog hoda servomotora, potrebno je predvidjeti neko sredstvo za ugađanje oslonca na sipki, što znatno povećava troškove masovne proizvodnje i sklapanja. In US-A-4, 358,990 the rest position of the piston assembly is also determined by its coming into contact with the rear shell of the housing, and the rest position of the valve piston is in fact determined by a support provided on the actuating rod and engaging with a with the last extension, the extension of the last shell of the case. In order to allow adjustment of the servo motor backlash, it is necessary to provide some means of adjusting the support on the tie rod, which greatly increases the cost of mass production and assembly.
Opis rješenja tehničkog problema sa primjerom izvođenja i sa kratkim opisom slike nacrta. Description of the solution to the technical problem with an example of implementation and a brief description of the drawing image.
Cilj je ovog izuma ostvariti servomotor opisane vrste, pojednostavljene konstrukcije, nižih troškova proizvodnje i sklapanja, koji ima mrtvi hod jednak nuli. U njemu sklop klipa i klip ventila automatski zauzimaju odgovarajuće položaje mirovanja koji su samougodivi, kako bi osigurali da mrtvi hod bude jednak nuli. The aim of this invention is to realize a servomotor of the described type, simplified construction, lower production and assembly costs, which has a dead stroke equal to zero. In it, the piston assembly and the valve piston automatically take up the respective self-satisfying rest positions to ensure that the dead stroke is equal to zero.
Da bi se to postiglo, a prema jednom svojstvu izuma, naslon na koji se oslanja opruga za vraćanje pokretačke šipke izveden je tako, da klizi na pokretačkoj šipki, a na strani suprotnoj od povratne opruge šipke ima prvi i druge oslone površine, koje sudjeluju sa jednim osloncem izvedenim na sipki, odnosno sa jednim nepokretnim osloncem. In order to achieve this, and according to one feature of the invention, the support on which the return spring of the actuating rod rests is made so that it slides on the actuating rod, and on the opposite side of the return spring, the rod has first and second support surfaces, which participate with with one support made on the bar, that is, with one immovable support.
Prema jednom svojstvu izuma, nepokretni oslonac je izveden kao oslonac pričvršćen za kućište servomotora. Oslonac je tipično cjevastog oblika i pruža se koncentrično oko zadnjeg dijela glavčine sklopa klipa, pri čemu sudjeluje sa drugom drugom površinom oslanjanja naslona klizno postavljenog na šipki i kojeg tvori jedan oslonca koji je savijen unazad prema šipki. According to one feature of the invention, the immovable support is designed as a support attached to the housing of the servomotor. The support is typically tubular in shape and extends concentrically around the rear part of the hub of the piston assembly, where it cooperates with the second support surface of the support slidably mounted on the rod and formed by one support which is bent back towards the rod.
Ovakvom konstrukcijom relativni položaji mirovanja sklopa klipa i klipa ventila postižu se automatski pomoću nepokretnih i pokretnih sjedišta ventila, koja se oslanjaju na ventil pod djelovanjem neznatne razlike u vakuumu koja postoji, u radnom stanju servomotora, u obje komore kućišta kad je ovo priključeno na neki izvor vakuuma, i pod djelovanjem povratne opruge šipke koja se , posredstvom kliznog naslona, oslanja na nepokretni oslonac, kojeg niti sklop klipa niti pokretačka šipka ne ometaju prilikom nalijeganja, a elastičnost povratne opruge šipke na taj način dozvoljava jedan opseg samougađanja, bez primjene bilo kakvog uređaja i naprave koji bi povećali troškove proizvodnje i sklapanja. With this construction, the relative rest positions of the piston assembly and the valve piston are achieved automatically by means of stationary and movable valve seats, which rest on the valve under the action of the slight difference in vacuum that exists, in the operating state of the servomotor, in both chambers of the housing when this is connected to a source vacuum, and under the action of the return spring of the rod, which, by means of a sliding support, rests on a stationary support, which neither the piston assembly nor the driving rod interferes with during contact, and the elasticity of the return spring of the rod thus allows a range of self-adjustment, without the use of any device and devices that would increase production and assembly costs.
Druga svojstva i prednosti ovog izuma sagledat će se iz sljedećeg opisa jednog izvođenja, danog u cilju ilustracije koja ni na koji način ne ograničava izum, a sa pozivom na priloženi crtež, gdje : Other properties and advantages of this invention will be seen from the following description of one embodiment, given for the purpose of illustration, which does not limit the invention in any way, and with reference to the attached drawing, where:
- jedina slika crteža prikazuje djelomičan uzdužni presjek jednog dvokomornog servomotora za pomoć pri kočenju, prema izumu. - the only image of the drawing shows a partial longitudinal section of a two-chamber servo motor for braking assistance, according to the invention.
Servomotor za pomoć pri kočenju obuhvaća kućište 1,sastavljenog od, po obodu zabrtvljenog sklopa koji sačinjavaju prednja školjka 2 kućišta i zadnja školjka 3 kućišta. Kućište 1 je u unutrašnjosti podijeljeno na prednju, ili vakuum, komoru 4, priključkom 5, ugrađenim u prednju školjku 2, povezanu sa jednim izvorom vakuuma, na primjer sa usisnom granom motora nekog vozila, i na zadnju ili radnu komoru 6, odijeljenu sklopom klipa 7. Sklop 7 sastoji se od prstenastog sklopa dijafragme 8 i ploče 9 za ojačanje, postavljenih na glavčini 10, u koju je ugrađen jedan razvodni ventil 11, koji će biti kasnije opisan detaljnije. Kod prikazanog izvođenja, glavčina 10 ima zadnji dio 12 smanjenog promjera, oblika cjevastog tijela koje klizi, i zabrtvljeno je u odnosu na zadnju školjku 3 kućišta 1 jednim prstenastim sklopom za vođenje i brtvljenje, koji se sastoji od vodilice 13 i jednog kliznog brtvila 14, ugrađenih, ugrađenih u zadnji cjevasti nastavak 15 zadnje školjke 3. Kućište 1 obuhvaća prednje prstenasto ojačanje 16a i zadnje prstenasto pojačanje 16b, koja su pričvršćena za prednje površine školjke prednje 2 i zadnje školjke 3, na koja su postavljeni vijci 17a i 17b za pričvršćivanje, za postavljanje jednog glavnog cilindra ( koji nije prikazan ) na prednju školjku 2, i za ugradnju sklopa glavni cilindar/servomotor na čvrstu pregradu vozila ( nije prikazana ). The servo motor for braking assistance includes a housing 1, composed of a peripherally sealed assembly consisting of the front shell 2 of the housing and the rear shell 3 of the housing. The housing 1 is internally divided into a front, or vacuum, chamber 4, by a connection 5, built into the front shell 2, connected to one source of vacuum, for example with the intake manifold of the engine of a vehicle, and into a rear or working chamber 6, separated by a piston assembly 7. The assembly 7 consists of an annular diaphragm assembly 8 and a plate 9 for reinforcement, placed on the hub 10, in which one distribution valve 11 is installed, which will be described in more detail later. In the embodiment shown, the hub 10 has a rear part 12 of reduced diameter, in the form of a sliding tubular body, and is sealed with respect to the rear shell 3 of the housing 1 by a single ring assembly for guiding and sealing, consisting of a guide 13 and a sliding seal 14, installed, installed in the rear tubular extension 15 of the rear shell 3. The housing 1 includes the front ring reinforcement 16a and the rear ring reinforcement 16b, which are attached to the front surfaces of the front shell 2 and the rear shell 3, on which the screws 17a and 17b are placed for fixing, for placing one main cylinder (not shown) on the front shell 2, and for installing the main cylinder/servomotor assembly on the solid partition of the vehicle (not shown).
Klip 20 ventila je ugrađen tako da klizi u ventralnom kućištu središnjeg dijela glavčine 10 sklopa 7 ventila, a klip 20 ventila je čvrsto povezan sa loptastim krajem šipke 21, na čijem je drugom kraju vilica 22 za zglobno vezivanje sa pedalom kočnice motornog vozila (nije prikazano). The valve piston 20 is installed so that it slides in the ventral housing of the central part of the hub 10 of the valve assembly 7, and the valve piston 20 is firmly connected to the ball end of the rod 21, at the other end of which there is a fork 22 for articulated connection with the brake pedal of a motor vehicle (not shown ).
Klip 20 na svom zadnjem kraju ima pokretno prstenasto sjedište 23 ventila koje sudjeluje sa prednjom ojačanom površinom cjevastog ventila 24, izrađenom od elastomjernog materijala i postavljenom da naliježe na unutrašnji naslon zadnjeg dijela 12 glavčine pomoću cjevaste ploče 25 za oslanjanje, čiji je presjek u osnovi Z ili L oblika. The piston 20 has at its rear end a movable annular valve seat 23 which engages with the front reinforced surface of the tubular valve 24, made of an elastomeric material and arranged to rest against the inner abutment of the rear part 12 of the hub by means of a tubular support plate 25, the section of which is basically Z or L-shaped.
U središnjem dijelu glavčine 10 izvedeno je jedno nepokretno prstenasto sjedište 26 ventila, koje je koncentrično postavljeno oko klipa 20 i sudjeluje selektivno sa prednjom površinom ventila 24. In the central part of the hub 10, there is one fixed annular seat 26 of the valve, which is concentrically placed around the piston 20 and participates selectively with the front surface of the valve 24.
Ova prednja površina ventila 24 potiskivana je prema nepokretnom sjedištu 26 ventila i pokretnom sjedištu ventila ventilskom oprugom 27, koja se oslanja na unutrašnji kraj cjevaste ploče 25 za oslanjanje. This front surface of the valve 24 is pushed against the stationary valve seat 26 and the movable valve seat by the valve spring 27, which rests on the inner end of the tubular support plate 25.
Uzdužni kanali 28 i jedan radijalni kanal 29 izvedeni su u glavčini 10 kako bi se ventil 11 doveo sa vakuum komorom 4, odnosno sa radnom komorom 6. Longitudinal channels 28 and one radial channel 29 are made in the hub 10 in order to bring the valve 11 with the vacuum chamber 4, that is, with the working chamber 6.
Prema izumu, čaura 30 klizno je postavljena na pokretačkoj sipki 21. Čaura 30 ima cilindričnu košuljicu 31 navučenu na cilindrični dio šipke 21, i ima na prednjem kraju prirubnicu 32 na koju se oslanja povratna spiralna opruga 33 šipke 31, pri čemu je ta opruga oblika zarubljenog konusa i oslanja se svojim drugim krajem na srednji dio cjevaste ploče 25 za oslanjanje. Na kraju suprotnom od prirubnice 32, čaura 30 ima drugi dio izveden kao prirubnica 34 koja se proteže radijalno, a produžuje se prema van aksijalno jednim dijelom oblika zarubljenog konusa koji se završava prstenastom krajnjom prirubnicom 35, aksijalno pokretanom od unutrašnje prirubnice 34. According to the invention, the bushing 30 is slidably mounted on the actuating rod 21. The bushing 30 has a cylindrical liner 31 threaded onto the cylindrical part of the rod 21, and has a flange 32 at the front end on which the return spiral spring 33 of the rod 31 rests, this spring having the form tapered cone and rests with its other end on the middle part of the tubular plate 25 for support. At the end opposite to the flange 32, the sleeve 30 has a second part designed as a flange 34 that extends radially, and is extended outward axially by a part of the shape of a hemmed cone that ends with an annular end flange 35, axially driven by the inner flange 34.
U zadnjem dijelu glavčine 12, oko šipke 21 ( u ovom slučaju oko čahure 30 ) smješten je prstenasti pročistački sklop 36, koji uklanja nečistoće iz atmosferskog zraka koji ulazi u kroz unutrašnjost zadnjeg dijela glavčine 12 u ventil 11, a odavde selektivno, za vrijeme jedne faze kočenja, u zadnju radnu komoru 6 servomotora. In the rear part of the hub 12, around the rod 21 (in this case around the sleeve 30), there is an annular cleaning assembly 36, which removes impurities from the atmospheric air that enters through the interior of the rear part of the hub 12 into the valve 11, and from here selectively, during one braking phase, into the rear working chamber of 6 servomotors.
Prema jednom svojstvu izuma, jedan dio u obliku cjevastog nastavka 40 za oslanjanje, pričvršćenog za kućište 1, postavljen je oko zadnje školjke 3, kako bi, oslanjajući se na nju sudjelovao sa zadnjom površinom krajnje prirubnice 35 čahure 30. According to one feature of the invention, a part in the form of a tubular bearing extension 40, attached to the housing 1, is placed around the rear shell 3, so as to engage with the rear surface of the end flange 35 of the sleeve 30 by resting on it.
Kod prikazanog izvođenja, cjevasti nastavak 40 je sužen na svom prednjem kraju 41 i utisnut u jedan periferni žlijeb 42 vodilice 13. In the embodiment shown, the tubular extension 40 is narrowed at its front end 41 and pressed into one peripheral groove 42 of the guide 13.
Nastavak 40 na svom suprotnom kraju ( to znači na zadnjem kraju ) ima prstenastu prirubnicu 43, radijalno povijenu prema unutra kao površinu oslanjanja za krajnju prirubnicu 35 čahure 30. Kao što je prikazano na crtežu, zaštitni mijeh 36 postavljen je u prstenastom prostoru između cjevastog nastavka 40 i zadnjeg dijela 12 glavčine, a mijeh 36 je svojim prednjim krajem vezan za vodilicu 13, dok mu je zadnji kraj vezan unutar zadnjeg kraja 12 glavčine. The extension 40 at its opposite end (that is, at the rear end) has an annular flange 43, radially inwardly bent as a bearing surface for the end flange 35 of the sleeve 30. As shown in the drawing, a protective bellows 36 is placed in the annular space between the tubular extension 40 and the rear part 12 of the hub, and the bellows 36 is connected with its front end to the guide 13, while its rear end is connected inside the rear end 12 of the hub.
Servomotor je dopunjen jednom radnom polugom 37 ugrađenom na središnjem dijelu glavčine 10, koja sudjeluje sa primarnim klipom spomenutog glavnog cilindra, a jedan prstenasti dio 38 od elastomernog materijala ugrađen je između poluge 37 i klipa 20 ventila. The servomotor is supplemented by one working lever 37 installed on the central part of the hub 10, which cooperates with the primary piston of the mentioned master cylinder, and one annular part 38 made of elastomer material is installed between the lever 37 and the piston 20 of the valve.
Pokretačka šipka 21 ima isto tako, najpogodnije u području njene veze sa vilicom 22, jedan obod 39 koji se širi prema van, i koji sudjeluje sa zadnjom prirubnicom 34 čahure 30 i pomiče ovu u isto vrijeme kao i šipku 21 za vrijeme kočenja, kako bi pratila kretanje sklopa 7 klipa nasuprot djelovanju povratne opruge 50, smještene između prednjeg ojačanja 16a i glavčine 10. The driving rod 21 also has, most conveniently in the area of its connection with the fork 22, a rim 39 which extends outwards, and which engages with the rear flange 34 of the sleeve 30 and moves this at the same time as the rod 21 during braking, in order to followed the movement of the piston assembly 7 against the action of the return spring 50, located between the front reinforcement 16a and the hub 10.
U proizvodnji su komponente servomotora dimenzirane tako da zauzimaju položaj kako je prikazano na priloženom crtežu. To znači da su pod djelovanjem povratne opruge 50, sa sklopom 7 klipa na neznatnom razmaku od zadnje školjke 3 sa čahurom 30, nepokretno sjedište 26 ventila i pokretno sjedište 23 u istoj ravnini, jer oba naliježu tako da su zabrtvljena prema prednjoj površini ventila 24. In production, the servomotor components are dimensioned so that they occupy the position as shown in the attached drawing. This means that under the action of the return spring 50, with the piston assembly 7 at a slight distance from the rear shell 3 with the sleeve 30, the stationary seat 26 of the valve and the movable seat 23 are in the same plane, because they both lie so that they are sealed against the front surface of the valve 24.
Pri tome se čahura 30 svojom krajnjom prirubnicom 35 oslanja na prirubnicu 43 nastavka 40, a njena se unutrašnja prirubnica 34 oslanja na obod 39 šipke 21. In this case, the sleeve 30 rests with its end flange 35 on the flange 43 of the extension 40, and its inner flange 34 rests on the rim 39 of the rod 21.
Kad je servomotor ugrađen i povezan sa izvorom vakuuma, depresija stvorena u vakuum komori 4 najprije pokušava pomaknuti sklop 7 prema naprijed i na taj način odvojiti nepokretno sjedište 26 ventila od prednje površine ventila 24 (pokretno sjedište 23 ventila ostaje pritisnuto na čeonu površinu ventila 24 pod djelovanjem povratne opruge 33 i pritiska između unutrašnje prirubnice 34 i oboda 39 šipke 21). When the servomotor is installed and connected to the vacuum source, the depression created in the vacuum chamber 4 first tries to move the assembly 7 forward and thus separate the stationary valve seat 26 from the front surface of the valve 24 (the movable valve seat 23 remains pressed against the front surface of the valve 24 under by the action of the return spring 33 and the pressure between the inner flange 34 and the rim 39 of the rod 21).
Uslijed toga zračnost stvorena između nepokretnog sjedišta 26 ventila i ventila 24 stvara vezu kroz kanal 29 između vakuum komore 4 i radne komore 6, dovodeći ovu na nivo vakuuma koji je blizak, ali ipak manji od vakuuma koji postoji u vakuum komori 4, omogućujući na taj način da povratna opruga 50 klipa vrati sklop 7 klipa u prethodni položaj. As a result, the clearance created between the stationary seat 26 of the valve and the valve 24 creates a connection through the channel 29 between the vacuum chamber 4 and the working chamber 6, bringing it to a vacuum level that is close, but still smaller than the vacuum that exists in the vacuum chamber 4, allowing way for the piston return spring 50 to return the piston assembly 7 to its previous position.
To znači da sjedište 26 ventila opet nalegne na ventil 24. Može se vidjeti da uslijed "plivajuće" ugrađene šipke 21 ( i klipa 20 ) u odnosu na čahuru 30, čahura 30, u stvari, nije zavisna od položaja šipke 21 kod ugradnje, i da sklop 7 klipa može opet zauzeti položaj mirovanja sa hodom ravnim nuli prema navedenom postupku, u velikoj mjeri nezavisno od postojećih tolerancija glavčine 10 i kućišta 1. This means that the seat 26 of the valve rests again on the valve 24. It can be seen that due to the "floating" installed rod 21 (and piston 20) in relation to the sleeve 30, the sleeve 30 is, in fact, not dependent on the position of the rod 21 during installation, and that the piston assembly 7 can again take the rest position with zero travel according to the above procedure, to a large extent independent of the existing tolerances of the hub 10 and the housing 1.
Funkcioniranje u fazi kočenja je uobičajeno: kada se šipka 21 pomakne ulijevo (prema crtežu) iz položaja mirovanja (u kome su komore 4 i 6 u biti na istom nivou vakuuma), pokretno sjedište 23 ventila odvaja se od prednje površine ventila 24 koji ostaje pritisnut na nepokretno sjedište 26 ventila, omogućujući tako atmosferskom zraku da, prošavši kroz sklop filtra 36, uđe kroz kanal 29 u radnu komoru 6. The operation in the braking phase is normal: when the rod 21 is moved to the left (according to the drawing) from the rest position (in which the chambers 4 and 6 are essentially at the same vacuum level), the movable seat 23 of the valve separates from the front surface of the valve 24, which remains pressed on the stationary seat 26 of the valve, thus enabling the atmospheric air to pass through the filter assembly 36 and enter through the channel 29 into the working chamber 6.
Na svakoj strani sklopa 7 klipa tako se stvar jedna pomoćna razlika pritiska koja pomiče sklop 7 klipa u pravcu aktiviranja šipke 21. On each side of the piston assembly 7, an auxiliary pressure difference is created, which moves the piston assembly 7 in the direction of activating the rod 21.
Kad prestane sila djelovati na šipku 21, ova se vraća natrag pod djelovanjem povratne opruge 33 (i povratne opruge pedale kočnice ). When the force acting on the rod 21 stops, it returns back under the action of the return spring 33 (and the return spring of the brake pedal).
Uslijed toga pokretno sjedište 23 ventila snažno pritisne ventil unazad, nasuprot djelovanju opruge 25 ventila. Na taj način se široko otvara ventil 24 iznad nepokretnog sjedišta 26 ventila i omogućuje brzo sniženje pritiska u radnoj komori 6, tako da se pod djelovanjem opruge 50 za vraćanje klipa, sklop 7 klipa jednako brzo vraća prema svom zadnjem položaju u području zadnje školjke 3. Na kraju ovog povratnog kretanja, čahura 30 svojom krajnjom prirubnicom 35 opet nalaže na pri-rubnicu 43 nastavka 40, tako da vraća posredstvom povratne opruge 33 sklop klipa 7 u njegov položaj mirovanja. As a result, the movable seat 23 of the valve strongly presses the valve backwards, against the action of the spring 25 of the valve. In this way, the valve 24 opens wide above the stationary valve seat 26 and enables a rapid lowering of the pressure in the working chamber 6, so that under the action of the piston return spring 50, the piston assembly 7 is equally quickly returned to its last position in the area of the rear shell 3. At the end of this return movement, the sleeve 30, with its end flange 35, rests again on the flange 43 of the extension 40, so that it returns the piston assembly 7 to its resting position by means of the return spring 33.
Pri tome nepokretno sjedište 26 ventila naliježe na prednju površinu ventila 24 u jednoj ravnini koja je određena pokretnim sjedištem 23 ventila u položaju mirovanja klipa 20. At the same time, the stationary seat 26 of the valve rests on the front surface of the valve 24 in one plane, which is determined by the movable seat 23 of the valve in the rest position of the piston 20.
Prema jednom svojstvu izuma, a da bi se servomotor osposobio da prođe ispitivanja poznata kao provjera istezanja, koja se sastoji u primjeni velike sile rastezanja na šipku 21 ( na crtežu u smjeru u desno ) , koristi se klin 60 s oblikom slova U. koji je umetnut u prednji dio kanala 29, a u skladu sa konstrukcijom koja je predmet europskog patentnog spisa EP-A-0, 101,658. According to one feature of the invention, and in order to enable the servo motor to pass tests known as the stretching test, which consists in applying a large stretching force to the rod 21 (in the drawing in the direction to the right), a pin 60 with the shape of the letter U is used, which is inserted into the front part of the channel 29, and in accordance with the construction which is the subject of European patent document EP-A-0, 101,658.
Kraj klina koji je odsječen u obliku slova U, sa zazorom ulazi u periferni žlijeb 61 klipa 20, koji je prema čeonoj strani ograničen jednim prstenastim uporom 62. The end of the wedge, which is cut off in the shape of the letter U, enters the peripheral groove 61 of the piston 20 with a gap, which is limited on the front side by one ring stop 62.
Ovakvom konstrukcijom, kada se na šipku 21 djeluje spomenutom velikom silom rastezanja, klip 20 će svojim prstenastim uporom 62 nalijegati na klin 60, pa se sila rastezanja preko ovog prenosi na sklop 7 klipa, tako da ovaj nalegne na zadnje ojačanje 16b. With this construction, when the rod 21 is acted upon by the aforementioned large stretching force, the piston 20 will rest on the pin 60 with its ring stop 62, so the stretching force is transmitted via this to the piston assembly 7, so that it rests on the last reinforcement 16b.
Da bi se , kao što je prikazano na crtežu, omogućilo klipu 20 da za vrijeme faze otpuštanja kočenja postigne široko otvaranje između ventila 24 i nepokretnog sjedišta ventila, žlijeb 61 je aksijalno tako dimenziran da u stanju mirovanja, prikazanom na crtežu, postoji velika zračnost između klina 60 i upora 62. In order, as shown in the drawing, to allow the piston 20 to achieve a wide opening between the valve 24 and the stationary valve seat during the braking release phase, the groove 61 is axially dimensioned so that in the rest state, shown in the drawing, there is a large clearance between pin 60 and abutment 62.
Prema jednom drugom svojstvu izuma, za slučajeve kada u stanju mirovanja kod servomotora prema izumu ugrađenog u vozilo pedala vezana za vilicu 22 leži u području koje je u blizini zadnjeg kraja 12 glavčine, predviđen je jedan dijametralni prorez 70 u zadnjem dijelu nastavka 40, koji se pruža aksijalno i u koji može ulaziti profil ili rub pedale kočnice kada se pedala pritisne do kraja. According to another feature of the invention, for cases when in the idle state of the servo motor according to the invention installed in the vehicle, the pedal attached to the fork 22 lies in the area near the rear end 12 of the hub, one diametrical slot 70 is provided in the rear part of the extension 40, which extends axially and into which the profile or edge of the brake pedal can enter when the pedal is fully depressed.
Navod o najboljem, prijavitelju poznatom, načinu za privrednu upotrebu prijavljenog izuma Statement about the best, known to the applicant, method for economic use of the registered invention
Osnovni elementi dvokomotornog servomotora izrađuju se od standardnih konstrukcijskih čelika, kao što su Č0564, Č0645, Č0745 ili sl. The basic elements of the twin-motor servomotor are made of standard structural steels, such as Č0564, Č0645, Č0745 or similar.
Za elemente ventila, pokretačku šipku i dr. koriste se čelici za cementaciju, kao što su Č4180, Č4320, Č4321, ili neki od čelnika na bazi Cr-Ni ili Cr-Ni-Mo legura. For valve elements, actuating rod, etc., steels for cementation are used, such as Č4180, Č4320, Č4321, or some of the leaders based on Cr-Ni or Cr-Ni-Mo alloys.
Dimenzije servomotora zavise od vozila u koje će se ugrađivati, kao i od očekivanih uvjeta rada vozila. The dimensions of the servomotor depend on the vehicle in which it will be installed, as well as on the expected operating conditions of the vehicle.
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8404388A FR2561599B1 (en) | 1984-03-21 | 1984-03-21 | BRAKE ASSISTANCE SERVOMOTOR |
YU37885A YU46657B (en) | 1984-03-21 | 1985-03-11 | TWO-CHAMBER SERVOMOTOR WITH VACUUM BRAKE AMPLIFIER IN MOTOR VEHICLES |
Publications (1)
Publication Number | Publication Date |
---|---|
HRP920751A2 true HRP920751A2 (en) | 1995-04-30 |
Family
ID=26223873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HR920751A HRP920751A2 (en) | 1984-03-21 | 1992-10-01 | Vacuum power-assisted brake servo |
Country Status (1)
Country | Link |
---|---|
HR (1) | HRP920751A2 (en) |
-
1992
- 1992-10-01 HR HR920751A patent/HRP920751A2/en not_active Application Discontinuation
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A1OB | Publication of a patent application | ||
ODBC | Application rejected |