DK151491B

DK151491B - THUMB WRITING MECHANISM, ISSUED FOR AXIAL PUMP PUMP

Info

Publication number: DK151491B
Application number: DK235782A
Authority: DK
Inventors: Gerard Chanlon
Original assignee: Creusot Loire
Priority date: 1981-05-27
Filing date: 1982-05-25
Publication date: 1987-12-07
Also published as: ES511958A0; NO158433B; ATE9175T1; DK235782A; JPS57200678A; FR2506857B1; CA1203711A; NO821441L; EP0069605A1; ES8304271A1; SU1259966A3; DK151491C; EP0069605B1; JPH0125896B2; NO158433C; FR2506857A1; DE3260625D1

Abstract

1. Barrel mechanism comprising, inside a casing (1), a drive member (4) mounted pivotally on at least one fixed bearing (31, 32) defining an axis (10) about which the drive member (4) is driven rotationally, a barrel (5) rotationally fixed and mounted pivotally on the drive member (4) about an axis (50) inclined relative to the axis of rotation (10) and convergent with the latter, a first axial thrust bearing (52) interposed between the barrel (5) and an oblique plate (40) disposed on the drive member (4) perpendicularly to the axis (50) of the barrel, and a second axial thrust bearing (44) interposed between a straight plate (45) disposed on the drive member (4) perpendicularly to the axis of rotation (10) and a fixed plate (33) which, through the medium of the two axial thrust bearings (44, 52), takes up the forces parallel to the axis of rotation (10) which are applied to the barrel (5), characterised by the fact that the fixed plate (33) is disposed at one end of a central column forming a spindle (3) defining the pivot axis of the drive member (4), while at the other end of the said central column is supported a means (6) for the elastic clamping of the drive member (4) against the fixed plate (33), the cassing (1) being provided with detechable means for fastening the spindle (3), the latter forming with the drive member (4) and the barrel (5) a compact assembly adapted to be installed in and removed from the interior of the casing (1) as a unit.

Description

151491151491

Den foreliggende opfindelse angår en tumleskivemekanisme af den i den indledende del af krav 1 angivne type og især til styring af en pumpe med aksialstempler.The present invention relates to a tumbler disk mechanism of the type set forth in the preamble of claim 1 and in particular to the control of a pump with axial pistons.

En sådan mekanisme, der har været kendt gennem længere tid, 05 er eksempelvis beskrevet i dansk fremlæggelsesskrift nr. 137 396. Mekanismen indeholder indvendigt i et hus et styrelegeme, der er monteret drejeligt i to faste lejer, som fastlægger en rotationsakse. Styrelegemet er forsynet med en flade, der er skråstillet i forhold til rotationsaksen, og på denne flade støtter en tumleskive, der er TO monteret drejeligt på styrelegemet omkring en akse, som forløber skråt i forhold til rotationsaksen og skærer denne i et svingningscentrum for tumleskiven. Tumleskivens rotationsakse er fastlagt af et leje, som er udformet i styrelegemet i centrum for den skrå flade. Styrelegemet danner således en rotor, som drives af en motor 15 omkring dens rotationsakse, og som tildeler tumleskiven en nuta-tionsbevægelse omkring svingningscentrum, idet tumleskiven er blokeret mod rotation af en forbindelsesstang. Pumpens stempler, der er fordelt regelmæssigt omkring rotationsaksen, støtter mod tumleskiven enten direkte eller, i større pumper, igennem stempel-20 stænger forsynet med kuglehoveder. De kræfter, som udøves af stemplerne på tumleskiven, bliver overført til styrelegemet af et aksialt trykleje, som er indsat mellem tumleskiven og den skrå flade. Styrelegemet støtter mod en stationær flade igennem et andet aksialt trykleje, som er indsat mellem den stationære flade og en 25 tværflade på styrelegemet vinkelret på rotationsaksen. Igennem de to tryklejer optager den stationære flade således de kræfter, som er parallelle med rotationsaksen og udøves af stemplerne på tumleskiven, hvis nutationsbevægelse bestemmer pumpestemplernes frem- og tilbagegående bevægelse styret af styrelegemets rotation.Such a mechanism, which has been known for a long time, 05 is described, for example, in Danish Patent Specification No. 137,396. The mechanism inside of a housing contains a guide body rotatably mounted in two fixed bearings defining a axis of rotation. The guide body is provided with a surface inclined with respect to the axis of rotation, and on this surface supports a tumbler disc, TO which is rotatably mounted on the guide body about an axis which extends obliquely to the axis of rotation and cuts it in a pivot center of the tumbler. The axis of rotation of the tumbler is determined by a bearing formed in the guide body at the center of the inclined surface. The guide body thus forms a rotor driven by a motor 15 about its axis of rotation and which gives the tumbler a nutritional movement about the center of oscillation, the tumbler being blocked against rotation of a connecting rod. The pistons of the pump, which are distributed regularly around the axis of rotation, support against the tumbler disc either directly or, in larger pumps, through piston rods provided with ball heads. The forces exerted by the pistons on the tumbler disk are transmitted to the guide body by an axial thrust bearing inserted between the tumbler disk and the inclined surface. The guide body bears against a stationary surface through a second axial thrust bearing inserted between the stationary surface and a transverse surface of the guide body perpendicular to the axis of rotation. Thus, through the two thrust bearings, the stationary surface absorbs the forces parallel to the axis of rotation and exerted by the pistons on the tumbler disk, whose nutritional movement determines the reciprocating movement of the pump pistons controlled by the rotation of the control body.

30 Det hus, hvori konstruktionen er monteret, bærer de to lejer for styrelegemet samt den stationære flade.The housing in which the structure is mounted carries the two bearings for the guide body as well as the stationary surface.

For at gøre huset lettere foreslås det i ovennævnte danske fremlæggelsesskrift at forbinde husets to endestykker ved hjælp af en bolt, som forspændes før ibrugtagningen på en sådan måde, at 35 den optager de kræfter, som udøves af tumleskiven på den faste flade og dermed pi huset. I en speciel udførelsesform forløber den forspændte bolt indvendigt i et rørformet mellemstykke, som optager 151491 2 forspændingskraften, og som endvidere bestemmer rotationsaksen for styrelegemet.In order to make the housing easier, it is proposed in the aforementioned Danish presentation specification to connect the two end pieces of the housing by means of a bolt which is pre-stressed prior to use in such a way that it absorbs the forces exerted by the tumble disc on the fixed surface and thus in the housing. . In a particular embodiment, the prestressed bolt extends internally into a tubular spacer which accepts the biasing force and further determines the axis of rotation of the guide body.

Den foreliggende opfindelses formål er at forenkle montagen af en mekanisme af denne type.The object of the present invention is to simplify the assembly of a mechanism of this type.

05 i den netop omtalte kendte pumpe frembringer forspændingen af den centrale bolt endvidere en sammenspænding af det aksiale trykleje til støtte af styrelegemet, og denne sammenspænding modvirker i høj grad de skiftende tryk- og trækkræfter, som er resultat af pumpens funktion. På denne måde kan man imidlertid ikke 10 indstille tryklejets sammenspænding. Opfindelsen afhjælper denne ulempe ved at foreslå en sammenspænding af tryklejet, som er uafhængig af boltens forspændingskraft.Furthermore, in the prior art pump just mentioned, the biasing of the central bolt produces a compression of the axial thrust bearing to support the guide body, and this compression greatly counteracts the changing compressive and tensile forces that result from the operation of the pump. In this way, however, it is not possible to adjust the pressure of the pressure bed. The invention alleviates this disadvantage by proposing a compression of the thrust bearing which is independent of the biasing force of the bolt.

De med opfindelsen opnåede fordele er imidlertid ikke begrænset til pumper i overensstemmelse med det nævnte fremlæggel ses-15 skrift, idet opfindelsen også mere generelt giver andre fordele i forbindelse med pumper af tumleskivetypen, således som det forklares i det følgende.However, the advantages of the invention are not limited to pumps in accordance with said disclosure, since the invention also more generally provides other advantages in connection with tumbler disc pumps, as explained below.

Ifølge opfindelsen er den stationære flade udformet i den ene ende af en central søjle eller tap, som bærer lejesøler, der bestem-20 mer drejeaksen for styrelegemet, mens den anden ende af den centrale tap er indrettet som støtte for et middel til elastisk tilspæn-ding af styrelegemet imod den stationære flade, og endvidere er huset forsynet med midler til aftagelig fastgørelse af tappen. På grund af dette arrangement danner tappen en kompakt enhed sam-25 men med styrelegemet og tumleskiven, og denne enhed kan monteres og demonteres under ét i det indre af huset.According to the invention, the stationary surface is formed at one end of a central column or pin, which carries bearing columns which determine the pivot axis of the guide body, while the other end of the central pin is adapted to support a means for elastic tensioning. and the housing is provided with means for detachably fastening the pin. Because of this arrangement, the pin forms a compact unit together with the guide body and the tumbler disk, and this unit can be assembled and dismounted together in the interior of the housing.

I en speciel udførelsesform udgøres midlet til tilspænding af styrelegemet af en bøsning, som er monteret glidende på enden af tappen og har en cirkulær ansats til sammentrykning af en elastisk 30 mellemlægsring imod en cirkulær ringskive, som støtter mod styrelegemet, samt en møtrik til tilspænding af bøsningen ved indgreb med et gevind udformet i enden af tappen.In a particular embodiment, the means for tightening the guide body is constituted by a bushing which is slidably mounted on the end of the pin and has a circular abutment for compressing an elastic spacer ring against a circular annular disc supporting the guide body, and a nut for tightening the the bushing by engagement with a thread formed at the end of the pin.

I det følgende beskrives opfindelsen nærmere på grundlag af udførelsesformer og under henvisning til tegningen, hvor 35 figur 1 viser et aksialt snit gennem en tumleskivemekanisme ifølge opfindelsen, og figur 2 et aksialt sn|t gennem en anden udførelsesform for 3 151491 mekanismen ifølge opfindelsen.In the following, the invention is described in more detail on the basis of embodiments and with reference to the drawing, in which Fig. 1 shows an axial section through a tumble disc mechanism according to the invention, and Fig. 2 shows an axial section through another embodiment of the mechanism according to the invention.

Pi tegningen er mekanismen ifølge opfindelsen vist indvendigt i et hus, som er sammensat af to endeplader 11 og 12, der er forbundet af en sidevæg 13. De to endeplader 11 og 12 bør være me-05 get stive, men som antydet ovenfor, hvis der anvendes en forspændt central bolt i overensstemmelse med dansk fremlæggelsesskrift nr. 137 396, deltager sidevæggen 13 ikke i kraftoptagelsen og kan dermed være meget let. På den ene endeplade 12 er der monteret en pumpe 2, og det ene af pumpens stempler 21 er vist.In the drawing, the mechanism according to the invention is shown internally in a housing composed of two end plates 11 and 12 which are connected by a side wall 13. The two end plates 11 and 12 should be very rigid, but as indicated above, if when a prestressed central bolt is used in accordance with Danish Patent Specification No. 137 396, the sidewall 13 does not participate in the power take-up and can thus be very light. On one end plate 12 a pump 2 is mounted and one of the pump pistons 21 is shown.

10 De to endeplader 11 og 12 i huset er endvidere forbundet ved deres centre af en central søjle eller tap 3 og hvorpå et hult legeme, som danner mekanismens styrelegeme 4, er drejeligt monteret og lejret. Styrelegemet 4 er drejeligt i to lejer, som bæres af tappen 3.The two end plates 11 and 12 of the housing are further connected at their centers by a central column or pin 3 and upon which a hollow body forming the guide body 4 of the mechanism is rotatably mounted and mounted. The guide body 4 is rotatable in two bearings supported by the pin 3.

Det ene af disse lejer 31 er monteret ved den ende af tappen 3, 15 som vender mod pumpen 2. Det andet leje 32 er monteret ved periferien af en flange eller flade 33, der er udformet ved den af leje-sølens ender, som vender mod den anden endeplade 11 i huset.One of these bearings 31 is mounted at the end of the pin 3, 15 facing the pump 2. The other bearing 32 is mounted at the periphery of a flange or surface 33 formed at the end of the bearing column facing toward the other end plate 11 of the housing.

Lejet 31 er monteret indvendigt i en aksial boring udformet i den tilsvarende ende af styrelegemet 4. Styrelegemet er imidlertid 20 centreret i det andet leje 32 ved hjælp af en tand krans 42, som er fastgjort til styrelegemet 4, og som står i indgreb med et tandhjul 43, der modtager en motors bevægelse.The bearing 31 is mounted internally in an axial bore formed at the corresponding end of the guide body 4. However, the guide body 20 is centered in the second bearing 32 by means of a tooth wreath 42 which is attached to the guide body 4 and which engages a gear 43 receiving a motor movement.

Stemplerne 21 i pumpen er forbundet med en tumleskive 5 ved hjælp af stempel stænger 22, der er forsynet med kugleled 23.The pistons 21 of the pump are connected to a tumbler disk 5 by means of piston rods 22 provided with ball joints 23.

25 Tumleskiven er monteret drejeligt i forhold til styrelegemet 4 ved hjælp af et leje 51, som fastlægger en rotationsakse 50, der forløber skråt i forhold til rotationsaksen 10 for styrelegemet, og de to akser skærer hinanden i et punkt O, der udgør tumleskivens svingningscentrum. I et plan, som ikke ligger i figurens plan, er tumle-30 skiven forbundet med huset 1 ved hjælp af en forbindelsesstang, der forhindrer tumleskiven i at dreje sig omkring aksen 10, men forbindelsesstangen tillader imidlertid, at tumleskiven svinger omkring centret O i overensstemmelse med bevægelserne af tumleskivens akse 50, der beskriver en kegleflade med toppunkt i O, når 35 tandhjulet 43 roterer styrelegemet 4.The tumbler is rotatably mounted relative to the guide body 4 by means of a bearing 51 which defines a axis of rotation 50 extending obliquely to the axis of rotation 10 of the guide body, and the two axes intersect at a point O which constitutes the center of oscillation of the tumbler. In a plane not in the plane of the figure, the tumbler disc is connected to the housing 1 by means of a connecting rod which prevents the tumbler disk from rotating about the axis 10, but the connecting rod allows the tumbler disk to rotate about the center 0 in accordance with with the movements of the axis of the tumbler disc describing a cone face having a vertex of 0 as the gear 43 rotates the guide body 4.

Tumleskiven 5 er afstøttet på en skri flade 40, der er ud- 151491 4 formet pi styrelegemet 4 vinkelret på aksen 50, ved hjælp af et aksiait trykleje 52, som eksempelvis er af nålelejetype, og som kan overføre de påvirkninger, som udøves på tumleskiven af stemplerne 21 og stempelstængerne 22, til styrelegemet 4 uden at forstyrre 05 tumleskivens drejning på lejet 51.The tumbler disk 5 is supported on a writing surface 40 formed on the guide body 4 perpendicular to the axis 50 by means of an axial thrust bearing 52, which is, for example, of the needle bearing type, which can transmit the stresses exerted on the tumbler disk. of the pistons 21 and piston rods 22, to the guide body 4 without interfering with 05 the turn of the tumbler on the bearing 51.

De påvirkninger, som modtages af styrelegemet 4, overføres til den stationære flade 33 ved hjælp af et aksiait trykleje 44, som er indsat mellem den stationære flade 33 og en tværstående flade 45, der er udformet i den ende af styrelegemet 4, som vender mod 10 endepladen 11, og står vinkelret på rotationsaksen 10.The stresses received by the control body 4 are transmitted to the stationary surface 33 by means of an axial thrust bearing 44 inserted between the stationary surface 33 and a transverse surface 45 formed at the end of the control body 4 facing 10, and is perpendicular to the axis of rotation 10.

Når der anvendes en forspændt stagbolt i overensstemmelse med dansk fremlæggelsesskrift nr. 137 396, udgøres denne bolt af et centralt skaft 14, som forløber i en aksial boring i tappen 3, hvis ender støtter mod de to endeplader 11 og 12 i huset, og tap-15 pen eller søjlen danner således et rørformet mellemstykke til at optage forspændingskræfterne.When a prestressed stud bolt in accordance with Danish Patent Specification No. 137 396 is used, this bolt is constituted by a central shaft 14 extending in an axial bore in the pin 3, the ends of which abut against the two end plates 11 and 12 in the housing, and The pen or column thus forms a tubular spacer for absorbing the biasing forces.

Det er således et første karakteristisk træk ved opfindelsen, at det aksiale trykleje 44 for styrelegemet 4 støtter mod en stationær flade 33, der er udformet på tappen 3, hvorimod hidtil 20 kendte mekanismer har styrelegemet støttet direkte på endepladen svarende til endepladen 11 i figur 1.Thus, it is a first feature of the invention that the axial thrust bearing 44 of the guide body 4 abuts against a stationary surface 33 formed on the pin 3, whereas hitherto known mechanisms have supported the guide body directly on the end plate corresponding to the end plate 11 of Figure 1. .

Ifølge et andet karakteristisk træk er tappen ved sin anden ende forsynet med midler 6 til sammenspænding af tryklejet. Disse midler udgøres af en bøsning 61, som kan glide aksiait langs en cy-25 lindrisk bæreflade 34, der er udformet ved enden af tappen 3. Bøsningen 61 er forsynet med en cirkulær ansats 62, der tjener til at sammentrykke en elastisk mellemlægsring 63 imod en cirkulær ringskive 64, som støtter mod styrelegemet 4 ved hjælp af et nåle-trykleje 65. I den viste udførelsesform støtter tryklejet 65 mod 30 yderringen i lejet 31 for styrelegemet.According to another characteristic feature, the pin at its other end is provided with means 6 for clamping the pressure bed. These means are formed by a sleeve 61 capable of sliding axially along a cylindrical support surface 34 formed at the end of the pin 3. The sleeve 61 is provided with a circular shoulder 62 which serves to compress an elastic spacer 63 against a circular ring disc 64 which supports the guide body 4 by means of a needle pressure bearing 65. In the embodiment shown, the pressure bearing 65 supports against the outer ring in the bearing 31 of the guide body.

Tilspændingen af bøsningen 61 er bestemt af en møtrik 66, som er i indgreb med et gevind 35, som er udformet i enden af tappen 3 uden for den cylindriske bæreflade 34.The tightening of the sleeve 61 is determined by a nut 66 which engages a thread 35 formed at the end of the pin 3 outside the cylindrical support surface 34.

Møtrikken 66 fremkalder således ved hjælp af den elastiske 35 mellemlægsring 63 en kontrolleret sammenspændingskraft i aksiallejet 44.Thus, by means of elastic spacer ring 63, nut 66 produces a controlled compressive force in axial bearing 44.

Med en anden møtrik 7 kan der i øvrigt udøves en sammen- 5 151491 spændingskraft på tryklejet 52 for tumleskiven ved at sammentrykke en elastisk mellemlægsring 71 imod en cirkulær ringskive 72, der støtter mod tumleskiven ved hjælp af et trykleje 73.In addition, with another nut 7, a compressive tension can be exerted on the pressure plate 52 for the tumbler by compressing an elastic spacer ring 71 against a circular annular disc 72 supporting the tumbler disk by a pressure bearing 73.

Som netop antydet er lejet 31 fastholdt ved hjælp af tilspænd-05 ingsmidlerne 6.As just indicated, the bearing 31 is retained by means of the tensioning means 6.

Inderringen i det andet leje 32 for styrelegemet kan hensigtsmæssigt være udgjort af den faste lejering i det aksiale trykleje 44, der afstøtter fladen 45 imod den faste flade 33.Conveniently, the inner ring of the second bearing 32 for the guide body may be constituted by the fixed bearing in the axial thrust bearing 44 supporting the surface 45 against the fixed surface 33.

I en variant, der er vist i figur 2, er de aksiale tryklejer 44 10 og 52 udgjort af rullelejer med koniske ruller 44' og 52'. I dette tilfælde er det muligt at udelade lejet 32, idet styrelegemets 4 centrering nu er sikret af rullelejet 44' med koniske ruller, hvis akser forløber skråt i forhold til rotationsaksen 1.In a variant shown in Figure 2, the axial thrust bearings 44 10 and 52 are formed by roller bearings with tapered rollers 44 'and 52'. In this case, it is possible to omit the bearing 32, since the centering of the guide body 4 is now secured by the roller bearing 44 'with tapered rollers whose axes extend obliquely to the axis of rotation 1.

Lejerne 31 og 51 er ligeledes erstattet af rullelejer med koniske 15 nåle 41' og 51'. Dette giver mulighed for at forenkle montagen ved at udelade den elastiske mellemlægsring 63, den cirkulære ringskive 64 samt tryklejet 65.The bearings 31 and 51 are also replaced by roller bearings with tapered needles 41 'and 51'. This allows the assembly to be simplified by omitting the elastic spacer ring 63, the circular annular disc 64 and the thrust bearing 65.

I denne anden udførelsesform støtter den forskydelige bøsning 61, der er tilspændt af møtrikken 66, direkte på inderringen i lejet 20 311, hvis yderring er fastlåst i styrelegemet 4, som dermed overtag er tilspændingskraften og overfører denne til den stationære flade 33.In this second embodiment, the displaceable sleeve 61 which is tightened by the nut 66 directly rests on the inner ring of the bearing 20 311, the outer ring of which is locked in the guide body 4, which thus takes over the tensioning force and transfers it to the stationary surface 33.

Lejet 31' er udgjort af en opstilling af rullelejer med koniske nåle, som er skråstillet i forhold til aksen 10. På grund af denne 25 skråstilling bevirker den aksiale sammenspændingskraft en elastisk radial deformation af lejernes yderringe og af styrelegemet 4.The bearing 31 'is formed by a set of roller bearings with conical needles which are inclined relative to the axis 10. Due to this inclined position, the axial compressive force causes an elastic radial deformation of the outer rings of the bearings and of the guide body 4.

Ved rullelejet 44' bevirker de skråstillede koniske ruller, som overfører den aksiale påvirkning fra lejets inderring til den stationære flade 33, på tilsvarende måde en radial deformation af lejets 30 yderring og af styrelegemet 4.At the roller bearing 44 ', the inclined conical rollers which transmit the axial influence from the inner ring of the bearing to the stationary surface 33, similarly cause a radial deformation of the outer ring of the bearing 30 and of the guide body 4.

Denne elastiske deformation af lejerne og af styrelegemet 4 virker således på tilsvarende måde som den elastiske mellemlægsring 63, som følgelig kan udelades.This elastic deformation of the bearings and of the guide body 4 thus acts in a similar manner to the elastic spacer ring 63, which can consequently be omitted.

Det tilsvarende gør sig gældende ved tilspændingen af tumle-35 skiven 5 mod den skrå flade 40. Lejet 51 og aksiallejet 52 er således udgjort af rullelejer med skråstillede koniske ruller 51' og 52'. Dermed bevirker den aksiale tilspændingskraft, der udøves af møtrikken 7 på inderringen i rullelejet 51' og overføres til den skrå flade 151491 6 40, en elastisk radial deformation af lejerne og af tumleskiven 5, hvilket har tilsvarende virkning som den elastiske mellemlægsring 71, der ligeledes kan udelades.The same applies to the tightening of the tumbler disc 5 against the inclined surface 40. The bearing 51 and the axial bearing 52 are thus formed by roller bearings with inclined tapered rollers 51 'and 52'. Thereby, the axial tightening force exerted by the nut 7 on the inner ring of the roller bearing 51 'and transmitted to the inclined surface 15 causes an elastic radial deformation of the bearings and of the tumbler disc 5, which has the same effect as the elastic intermediate ring 71, which also can be omitted.

Anvendelsen af koniske rullelejer bevirker således en væsentlig 05 forenkling af mekanismen.Thus, the use of tapered roller bearings significantly simplifies the mechanism.

I de to beskrevne udførelsesformer danner tappen 3 sammen med styrelegemet 4 og tumleskiven 5 en kompakt konstruktion, der holdes sammen af tilspændingsbøsningen 61 og møtrikken 61. Pi denne made kan denne konstruktion monteres i værkstedet, og tryk-10 lejernes sammenspænding kan indstilles. Der dannes således en kompakt mekanisk enhed, som anbringes indvendigt i huset 1, idet den ende af tappen 3, som anbringes ved pumpen, bringes i indgreb med et anslag 15, som er udformet i husets endeplade 12 eller nærmere betegnet i enden af et rørformet mellemstykke 25, som er 15 anbragt langs aksen for pumpen 2. Den mekaniske konstruktion, som bæres af tappen 3, bliver således fastholdt imellem husets 2 endeplader 11 og 12.In the two embodiments described, the pin 3 together with the guide body 4 and the tumbler disc 5 form a compact structure held together by the tightening bushing 61 and the nut 61. In this way, this construction can be mounted in the workshop and the compressive stresses of the bearings can be adjusted. Thus, a compact mechanical unit is formed which is placed inside the housing 1, the end of the pin 3 being applied to the pump engaging a stop 15 formed in the end plate 12 of the housing or more specifically at the end of a tubular spacer 25, which is positioned 15 along the axis of the pump 2. The mechanical construction carried by the pin 3 is thus held between the end plates 11 and 12 of the housing 2.

Stagbolten 14 anbringes derefter indvendigt i søjlen eller tappen 3 og i mellemstykket 25, hvorefter stagbolten sættes under 20 spænding og blokeres ved hjælp af en møtrik 17. Forspændingskraften i bolten 14 bliver optaget af tappen 3 og mellemstykket 25, der er anbragt i forlængelse af hinanden. Den mekaniske konstruktion, som er monteret på tappen 3, er således fastgjort fuldstændigt imellem de to endeplader 11 og 12, og hovederne på stempelstænger-25 ne 22 kan anbringes på plads på tumleskiven 5.The stud bolt 14 is then placed internally in the column or pin 3 and in the intermediate piece 25, after which the stud bolt is put under tension and blocked by a nut 17. The biasing force in the bolt 14 is absorbed by the pin 3 and the intermediate piece 25 arranged in extension of each other. . Thus, the mechanical structure mounted on the pin 3 is completely secured between the two end plates 11 and 12 and the heads of the piston rods 22 can be placed in place on the tumbler disc 5.

Konstruktionens montage er således forenklet betragteligt på grund af foranstaltningerne ifølge opfindelsen, der gør det muligt at udføre alle indstillinger af mekanismen på værkstedet.The assembly of the structure is thus considerably simplified due to the measures according to the invention enabling all settings of the mechanism to be carried out in the workshop.

I tilfælde af havari er det tilsvarende let at udtrække den me-30 kaniske enhed efter demontering af den centrale stagbolt 14, hvorefter enheden kan udskiftes med en ny enhed, der er indstillet i forvejen.In the event of a breakdown, it is easy to extract the mechanical unit after disassembly of the central stud bolt 14, after which the unit can be replaced with a new unit which is pre-set.

I mekanismen ifølge opfindelsen kan der anvendes glatte tryklejer og lejer af passende type i stedet for rullelejer med koniske 35 eller cylindriske ruller som beskrevet.In the mechanism according to the invention, smooth pressure bearings and bearings of the appropriate type may be used instead of roller bearings with tapered or cylindrical rollers as described.

Som allerede antydet er opfindelsen endvidere beskrevet i forbindelse med det specielle tilfælde, hvor husets 2 endeplader er forFurthermore, as already indicated, the invention is described in connection with the special case where the end plates of the housing are for

Claims

151491 is bonded by a prestressed stag bolt, but the mechanism of the invention has the same advantages in connection with tumbler disc pumps of other types. 05

A tumbler disc mechanism, in particular, for an axial piston pump, which internally of a housing (1) includes a guide member (4) mounted pivotally in at least one fixed bearing (31, 32) defining an axis (10), about said guide body (4) capable of being driven for rotation, a tumble disc (5) which is blocked against rotation and mounted pivotally on said guide body (4) about an axis (50) which extends 15 obliquely to the axis of rotation (10) and cuts this, a first axial thrust bearing (52) inserted between the tumbler disc (5) and an inclined surface (40) formed on the guide body (4) perpendicular to the tumbler disk axis (50) and a second axial thrust bearing (44) inserted between a surface (45) formed on the guide body (4) perpendicular to the axis of rotation (10), and a stationary surface (33) which, through the two thrust bearings (44, 52), receives impacts in the direction parallel to the axis of rotation (10) exerted on the tumbler disk (5), characterized in that the stationary surface (33) is formed 25 on one end of a central pin. (3) carrying bearing columns defining the axis of rotation of the guide body (4) while the other end of the pin is adapted to mount a means (6) for elastically tightening the guide body (4) against the stationary surface (33), and The housing (1) is provided with means for removably fastening the pin (3), which together with the guide body (4) and the tumbler disc (5) form a unit which can be assembled and removed from the interior of the housing (1) as a whole. ).

2. A mechanism according to claim 1, characterized in that the means (6) for tightening the guide body (4) is constituted by a sleeve (61) which is slidably mounted on the end of the pin (3) and has a circular shoulder (62). for compressing an elastic spacer ring (63) against a circular ring washer (64) supporting the guide body (4), and a nut (66) for tightening the bushing (61) with a thread formed at the end of the pin ( 3).

3. A mechanism as claimed in claim 1 or 2, characterized in that one (32) of the bearings for the guide body (4) is inserted between a cylinder surface on the part of the pin carrying the second pressure bearing 05 (44) and the inner periphery of the a wreath (42) secured to the guide body (4).

4. A mechanism according to claim 1, 2 or 3, characterized in that each axial thrust bearing (52, 44) is a roller bearing (52 ', 44') with tapered rollers, which simultaneously causes the transfer of axial forces and centering at the guide body (4), respectively. at the tumbler (5), relative to their respective axes.

5. A mechanism as claimed in any one of claims 1-4, characterized in that at least one (31) of the bearings of the guide body (4) is a roller bearing (31 ') with tapered rollers which are skewed relative to the axis of rotation ( 10) and the AT means (6) for tightening the guide body is a bushing (61) which supports against the inner ring of the bearing (31 ') / whose outer ring is locked in the guide body (4), and a nut (66) for tightening the the bushing by engagement with a corresponding thread formed at the end of the pin (3).