WO2012038119A1 - Pump and method for its manufacture - Google Patents

Pump and method for its manufacture Download PDF

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Publication number
WO2012038119A1
WO2012038119A1 PCT/EP2011/062858 EP2011062858W WO2012038119A1 WO 2012038119 A1 WO2012038119 A1 WO 2012038119A1 EP 2011062858 W EP2011062858 W EP 2011062858W WO 2012038119 A1 WO2012038119 A1 WO 2012038119A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
blind bore
pump cylinder
region
cylinder
Prior art date
Application number
PCT/EP2011/062858
Other languages
German (de)
French (fr)
Inventor
Oliver Gaertner
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to KR1020137007286A priority Critical patent/KR20130133172A/en
Priority to CN201180046022.6A priority patent/CN103118912B/en
Priority to JP2013529586A priority patent/JP2013540939A/en
Priority to EP11735877.0A priority patent/EP2619055A1/en
Priority to US13/825,821 priority patent/US20130302191A1/en
Publication of WO2012038119A1 publication Critical patent/WO2012038119A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/3675—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units
    • B60T8/368—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units combined with other mechanical components, e.g. pump units, master cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4031—Pump units characterised by their construction or mounting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/46—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition the pressure being reduced by exhausting fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D65/00—Designing, manufacturing, e.g. assembling, facilitating disassembly, or structurally modifying motor vehicles or trailers, not otherwise provided for
    • B62D65/02—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components
    • B62D65/12—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components the sub-units or components being suspensions, brakes or wheel units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0421—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F04B53/166—Cylinder liners
    • F04B53/168—Mounting of cylinder liners in cylinders
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making

Definitions

  • the invention relates to a pump, in particular for a vehicle brake system, and a method for producing such a pump.
  • a pump in which a single pump element or a pump unit is formed by a pump piston in a pump housing, which is displaceably mounted in a pump cylinder.
  • the pump piston sucks a brake fluid through an inlet opening into the pump cylinder and conveys it out through a drain opening out of the pump cylinder.
  • a pump and a method for producing a pump in particular for a vehicle brake system, are provided in which a pump housing is provided, a blind bore is formed in the pump housing starting from a region in the pump housing in which an eccentric opening is provided for receiving a drive eccentric , A pump cylinder is inserted into the blind bore from the region of the eccentric opening and the pump cylinder is fixed in the blind bore from the region of the eccentric opening.
  • a pump element or a pump unit of a piston pump which can be driven by means of an eccentric is mounted from the region of the associated eccentric opening into a blind hole.
  • This procedure is in contrast to the previous production method, in which the pump Penelement is inserted into a through hole, which was formed from the outside into the pump housing into the eccentric opening. This through hole must then be closed from the outside, which usually happens by means of caulking. Behind this caulking is currently in the pump housing, the high pressure area of the pump element, so that the associated caulking is exposed to correspondingly high pressure.
  • the pump element is fixed at each end of the blind bore in this, where the low-pressure region is located. Accordingly, the pressure load of the fixing device is also lower there.
  • components of an exhaust valve have been used in the blind bore according to the invention before the pump cylinder is inserted into the blind bore.
  • first components of an exhaust valve at the bottom of the blind bore are used before subsequently the pump element itself is inserted with the pump cylinder and usually also with the pump piston preassembled therein in the blind hole.
  • the thus inserted components of the exhaust valve are preferably in particular a valve spring for resiliently biasing a valve body and a valve body for selectively closing a valve opening.
  • the valve opening itself is then advantageously formed on the pump cylinder, so that the outlet valve is completed by the insertion of the pump cylinder into the blind bore.
  • the pump cylinder is preferably produced by deep drawing, ie as a deep-drawn part.
  • Deep drawing is a particularly cost-effective method for producing the pump cylinder mounted according to the invention.
  • the pump cylinder produced in this way is designed to be particularly thin-walled, it is generally less resilient to pressure.
  • the deep-drawn pump cylinder can also counteract large forces acting radially by being mounted such that it rests with its wall on the surrounding valve housing or supported.
  • at least one opening is advantageously formed in the pump cylinder, in particular before the step of deep drawing of the pump cylinder.
  • the thus formed opening preferably serves as an outlet opening or valve opening of the outlet valve. It is particularly advantageous at the bottom of the then cup-shaped pump cylinder formed. Furthermore, the opening preferably serves as an inlet opening for the pump cylinder, ie as that opening through which the pump piston sucks fluid into the pump cylinder.
  • the inlet region of the pump cylinder of this type is particularly advantageously designed with a multiplicity of individual openings, so that a filter screen results in the jacket surface of the then preferably cup-shaped pump cylinder.
  • the pump cylinder is preferably formed in a cup shape with an annular wall and a bottom surface.
  • the cup-shaped pump cylinder of this type advantageously also serves as a receptacle for the preassembly of components of the associated pump cylinder during assembly. This results in a preassembled module that can be subsequently used in one step in the pump cylinder.
  • the pump cylinder is preferably designed with an annular disc facing the region of the eccentric opening.
  • annular disc is preferably used to support an adjacent sealing ring.
  • the pump cylinder is preferably designed with an annular region facing the region of the eccentric opening.
  • the ring stage which can likewise be produced at almost no additional cost serves, in particular, to receive a sealing ring sealing between the inside of the pump cylinder and the outside of the pump piston.
  • the sealing ring can then optionally form a module to be pre-assembled together with the pump piston in the pump cylinder. In such pre-assembled Condition, the sealing ring can be inserted into the blind bore of the pump housing without being damaged.
  • the sealing ring is covered in this installation position of the ring stage radially outside and protected accordingly within the ring stage.
  • the pump cylinder is advantageously fixed by means of a set in the blind bore guide ring, which also serves for axially guiding a displaceable in the pump cylinder pump piston.
  • the thus mounted guide ring develops double effect. First, it acts as a radially supporting guide member for the pump piston during axial displacement within the pump piston. Second, the guide ring serves as a retaining ring. It prevents the pump cylinder from being able to move axially in the blind bore.
  • the pump cylinder is preferably fixed in the blind bore by means of clamping, in particular by caulking of the guide ring.
  • the caulking operation is a process that is also reliable in mass production. With this method, the holding forces required over the life of the pump can be ensured in a cost effective manner. As explained above, this is the case in particular, since the caulking is located on the low-pressure side of the pump element.
  • the blind bore is preferably formed by means of a bore which is formed through the then already formed eccentric opening therethrough.
  • the eccentric opening is first drilled and subsequently the blind bore is produced through it.
  • the blind bore can also be formed in a far inner region of the valve housing.
  • the blind bore is preferably closed on the outside of the pump housing, in particular by means of pressing in a blanking plug. With the closure of this type, the valve housing is also permanently sealed on its outside and secured against a possible escape of brake fluid.
  • FIG. 1 shows a longitudinal section of a pump according to the prior art
  • Fig. 2 is a longitudinal section of an embodiment of a pump with a
  • FIG. 3 shows the detail III in Fig. 2nd
  • a pump 10 is illustrated in the form of a piston pump for a hydraulic vehicle brake system, not shown, which serves to generate a fluid pressure of brake fluid within the vehicle brake system.
  • the pump 10 has a cup-shaped pump cylinder 12, which is produced as a turned part and in which a pump piston 16 is displaceably mounted against a helical spring 14.
  • the pump piston 16 conveys the brake fluid through a circular valve opening 17 of an outlet valve 18 formed in the bottom region of the pump cylinder 12 into a subsequent outflow 20.
  • the outlet valve 18 has a closing body 22 which is spring-biased by a helical spring 21.
  • a ring filter 24 is arranged on its circumference as a separate component, followed by an inlet valve 26 arranged on the pump piston 16 in the flow direction.
  • the pump piston 16 is sealed at its low pressure side by means of a sealing ring 28 against a pump housing 30 through.
  • a pump 10 according to the invention is shown in which an associated pump cylinder 32 is made by deep drawing.
  • the deep-drawing process has been carried out starting from a sheet as a blank, in particular a cup-shaped basic shape having an annular wall 34 and a bottom surface 36 has been designed.
  • the annular wall 34 is comparatively thin and thus prone to buckling, but lies with its outer side over a large area in the pump housing 30, so that compressive forces are transmitted to the pump housing 30.
  • a valve opening 38 for the outlet valve 18 as well as many comparatively small inlet openings 40 have been punched out in the region of the bottom surface 36 prior to deep-drawing. With these inlet openings 40, a filter screen has been produced on the pump cylinder 32, which is then completely deep-drawn, and can filter the inflowing brake fluid for its inflow.
  • annular step 42 At the end of the annular wall 34, which is opposite to the bottom surface 36, an annular step 42 has been formed during deep drawing. Of this annular step 42 covers an annular disc 39, the sealing ring 28 radially and a further annular wall 41 also axially. The sealing ring 28 is protected in this way against external mechanical influences.
  • the pump 10 according to FIGS. 2 and 3 has been produced as follows: First, the pump housing 30 has been provided and in it a blind bore 44 having a bottom 45, a first shoulder 47, a second shoulder 49 and a third shoulder 51 has been formed.
  • the blind bore 44 extends from the surface of the cuboid pump housing 30 into it and through a region of an eccentric opening 46, which has been formed in the pump housing 30 either before or after the blind bore 44.
  • the eccentric opening 46 is used during operation of the pump 10 for receiving a drive eccentric, not shown further for the pump piston 16th
  • the deep-drawn pump cylinder 32 has been used with its bottom surface 36 to the paragraph 47 and its annular step 42 to the paragraph 49.
  • the pump cylinder 32 has been fixed by means of a caulking 48 on the shoulder 51, which is located at the end opening of the blind bore 44 which is open towards the eccentric opening 46.
  • a caulking 48 while a cross-sectionally L-shaped guide ring 50 has been retained with caulked material in the blind bore 44, which had previously been pushed onto the pump piston 16 and against the other annular wall 41 of the deep-drawn pump cylinder 32 was frontally created.
  • the blind bore 44 has been closed after completion of the assembly of the pump cylinder 32 in particular with pre-assembled, associated pump piston 16 by means of a blind plug 52 which has been pressed into the blind bore 44 on the outside of the pump housing 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Reciprocating Pumps (AREA)

Abstract

A procedure for manufacturing a pump (10), in particular for a vehicle brake system, comprises the steps: provision of a pump housing (30), formation of a blind hole (44) in the pump housing (30) starting from a region in the pump housing (30) in which an eccentric opening (46) is provided for accommodating a drive eccentric, insertion of a pump cylinder (32) into the blind hole (44) from the region of the eccentric opening (46), and securing of the pump cylinder (32) in the blind hole (44) from the region of the eccentric opening (46). The invention also comprises a pump (10) which is constructed in such a way.

Description

Beschreibung Titel  Description title
Pumpe und Verfahren zu deren Herstellung Stand der Technik  Pump and process for its preparation Prior art
Die Erfindung betrifft eine Pumpe, insbesondere für eine Fahrzeugbremsanlage, und ein Verfahren zum Herstellen einer solchen Pumpe. The invention relates to a pump, in particular for a vehicle brake system, and a method for producing such a pump.
Aus DE 199 28 913 A1 ist eine Pumpe bekannt, bei der in einem Pumpengehäuse ein einzelnes Pumpenelement bzw. eine Pumpeneinheit von einem Pumpenkolben gebildet ist, der in einem Pumpenzylinder verschiebbar gelagert ist. Der Pumpenkolben saugt dabei ein Bremsfluid durch eine Zulauföffnung in den Pumpenzylinder hinein und fördert es durch eine Ablauföffnung aus dem Pumpenzylinder heraus. From DE 199 28 913 A1 a pump is known in which a single pump element or a pump unit is formed by a pump piston in a pump housing, which is displaceably mounted in a pump cylinder. The pump piston sucks a brake fluid through an inlet opening into the pump cylinder and conveys it out through a drain opening out of the pump cylinder.
Es ist eine Aufgabe der vorliegenden Erfindung ein Vorgehen zu nennen, mittels dem eine solche Pumpe besonders kostengünstig herstellbar und montierbar ist. It is an object of the present invention to provide an approach by means of which such a pump is particularly inexpensive to produce and assemble.
Offenbarung der Erfindung Disclosure of the invention
Erfindungsgemäß sind eine Pumpe und ein Verfahren zum Herstellen einer Pumpe, insbesondere für eine Fahrzeugbremsanlage, geschaffen, bei denen ein Pumpengehäuse bereitgestellt wird, eine Sackbohrung in dem Pumpengehäuse ausgehend von einem Bereich im Pumpengehäuse ausgebildet wird, in dem eine Exzenteröffnung zum Aufnehmen eines Antriebsexzenters vorgesehen ist, ein Pumpenzylinder in die Sackbohrung vom Bereich der Exzenteröffnung aus eingesetzt wird und der Pumpenzylinder in der Sackbohrung vom Bereich der Exzenteröffnung aus festgesetzt wird. According to the invention, a pump and a method for producing a pump, in particular for a vehicle brake system, are provided in which a pump housing is provided, a blind bore is formed in the pump housing starting from a region in the pump housing in which an eccentric opening is provided for receiving a drive eccentric , A pump cylinder is inserted into the blind bore from the region of the eccentric opening and the pump cylinder is fixed in the blind bore from the region of the eccentric opening.
Mit dem erfindungsgemäßen Vorgehen wird ein Pumpenelement bzw. eine Pumpeneinheit einer mittels eines Exzenters antreibbaren Kolbenpumpe vom Bereich der zugehörigen Exzenteröffnung aus in eine Sackbohrung montiert. Dieses Vorgehen steht im Gegensatz zur bisherigen Herstellungsweise, bei der das Pum- penelement in eine Durchgangsbohrung eingesetzt wird, die von außen in das Pumpengehäuse bis hinein in die Exzenteröffnung ausgebildet wurde. Diese Durchgangsbohrung muss dann von außen verschlossen werden, was in der Regel mittels einer Verstemmung geschieht. Hinter dieser Verstemmung befindet sich im Pumpengehäuse derzeit der Hochdruckbereich des Pumpenelements, so dass die zugehörige Verstemmung entsprechend hohem Druck ausgesetzt ist. Mit der erfindungsgemäßen Lösung ist das Pumpenelement hingegen an jedem Ende der Sackbohrung in dieser festzusetzen, an dem sich der Niederdruckbereich befindet. Entsprechend ist dort die Druckbelastung der Festlegungseinrichtung auch geringer. With the procedure according to the invention, a pump element or a pump unit of a piston pump which can be driven by means of an eccentric is mounted from the region of the associated eccentric opening into a blind hole. This procedure is in contrast to the previous production method, in which the pump Penelement is inserted into a through hole, which was formed from the outside into the pump housing into the eccentric opening. This through hole must then be closed from the outside, which usually happens by means of caulking. Behind this caulking is currently in the pump housing, the high pressure area of the pump element, so that the associated caulking is exposed to correspondingly high pressure. With the solution according to the invention, however, the pump element is fixed at each end of the blind bore in this, where the low-pressure region is located. Accordingly, the pressure load of the fixing device is also lower there.
Vorteilhaft sind erfindungsgemäß Bauteile eines Auslassventils in der Sackbohrung eingesetzt worden, bevor der Pumpenzylinder in die Sackbohrung eingesetzt wird. Advantageously, components of an exhaust valve have been used in the blind bore according to the invention before the pump cylinder is inserted into the blind bore.
Bei dieser Weiterbildung werden zunächst Bauteile eines Auslassventils am Bodenbereich der Sackbohrung eingesetzt, bevor nachfolgend das Pumpenelement selbst mit dessen Pumpenzylinder und in der Regel auch mit dem darin vormontierten Pumpenkolben in die Sackbohrung eingesetzt wird. Die derart eingelegten Bauteile des Auslassventils sind vorzugsweise insbesondere eine Ventilfeder zum federnden Vorspannen eines Ventilkörpers sowie ein Ventilkörper zum wahlweisen Verschließen einer Ventilöffnung. Die Ventilöffnung selbst ist hingegen vorteilhaft dann am Pumpenzylinder ausgebildet, so dass das Auslassventil durch das Einsetzen des Pumpenzylinders in die Sackbohrung komplettiert wird. In this development, first components of an exhaust valve at the bottom of the blind bore are used before subsequently the pump element itself is inserted with the pump cylinder and usually also with the pump piston preassembled therein in the blind hole. The thus inserted components of the exhaust valve are preferably in particular a valve spring for resiliently biasing a valve body and a valve body for selectively closing a valve opening. By contrast, the valve opening itself is then advantageously formed on the pump cylinder, so that the outlet valve is completed by the insertion of the pump cylinder into the blind bore.
Der Pumpenzylinder wird bevorzugt mittels Tiefziehen, also als Tiefziehteil, hergestellt. The pump cylinder is preferably produced by deep drawing, ie as a deep-drawn part.
Tiefziehen ist für das Herstellen des erfindungsgemäß montierten Pumpenzylinders ein besonders kostengünstiges Verfahren. Der derart hergestellte Pumpenzylinder ist zwar besonders dünnwandig gestaltet und damit grundsätzlich wenig auf Druck belastbar. Der tiefgezogene Pumpenzylinder kann aber dennoch auch großen radial wirkenden Kräften entgegenwirken, indem er derart montiert wird, dass er sich mit seiner Wand an dem umgebenden Ventilgehäuse anlegt bzw. abstützt. Ferner wird vorteilhaft mindestens eine Öffnung in dem Pumpenzylinder ausgebildet, insbesondere zeitlich vor dem Schritt des Tiefziehens des Pumpenzylinders. Deep drawing is a particularly cost-effective method for producing the pump cylinder mounted according to the invention. Although the pump cylinder produced in this way is designed to be particularly thin-walled, it is generally less resilient to pressure. Nevertheless, the deep-drawn pump cylinder can also counteract large forces acting radially by being mounted such that it rests with its wall on the surrounding valve housing or supported. Furthermore, at least one opening is advantageously formed in the pump cylinder, in particular before the step of deep drawing of the pump cylinder.
Die derart ausgebildete Öffnung dient bevorzugt als Auslassöffnung bzw. Ventilöffnung des Auslassventils. Sie ist besonders vorteilhaft am Boden des dann becherförmigen Pumpenzylinders ausgeformt. Ferner dient die Öffnung bevorzugt als Einlassöffnung für den Pumpenzylinder, also als jene Öffnung, durch die hindurch der Pumpenkolben Fluid in den Pumpenzylinder einsaugt. Der derartige Einlassbereich des Pumpenzylinders ist besonders vorteilhaft mit einer Vielzahl einzelner Öffnungen gestaltet, so dass sich ein Filtersieb in der Mantelfläche des dann bevorzugt becherförmig gestalteten Pumpenzylinders ergibt. The thus formed opening preferably serves as an outlet opening or valve opening of the outlet valve. It is particularly advantageous at the bottom of the then cup-shaped pump cylinder formed. Furthermore, the opening preferably serves as an inlet opening for the pump cylinder, ie as that opening through which the pump piston sucks fluid into the pump cylinder. The inlet region of the pump cylinder of this type is particularly advantageously designed with a multiplicity of individual openings, so that a filter screen results in the jacket surface of the then preferably cup-shaped pump cylinder.
Der Pumpenzylinder ist vorzugsweise in Becherform mit einer Ringwand und einer Bodenfläche ausgebildet. The pump cylinder is preferably formed in a cup shape with an annular wall and a bottom surface.
Der derart becherförmige Pumpenzylinder dient vorteilhaft auch bereits während der Montage als Aufnahme für das Vormontieren von Bauteilen des zugehörigen Pumpenzylinders. Es ergibt sich so eine vormontierte Baugruppe, die nachfolgend in einem Arbeitsschritt in den Pumpenzylinder eingesetzt werden kann. The cup-shaped pump cylinder of this type advantageously also serves as a receptacle for the preassembly of components of the associated pump cylinder during assembly. This results in a preassembled module that can be subsequently used in one step in the pump cylinder.
Alternativ oder zusätzlich ist der Pumpenzylinder bevorzugt mit einer dem Bereich der Exzenteröffnung zugewandten Ringscheibe ausgestaltet. Alternatively or additionally, the pump cylinder is preferably designed with an annular disc facing the region of the eccentric opening.
Die derart an die Ringwand des Pumpenzylinders auf kostenneutrale Weise angeformte Ringscheibe dient bevorzugt zum Abstützen eines benachbarten Dichtrings. The thus formed on the annular wall of the pump cylinder in a cost-neutral manner annular disc is preferably used to support an adjacent sealing ring.
Der Pumpenzylinder ist bevorzugt auch mit einer dem Bereich der Exzenteröffnung zugewandten Ringstufe gestaltet. The pump cylinder is preferably designed with an annular region facing the region of the eccentric opening.
Die derart ebenfalls nahezu ohne Mehrkosten herstellbare Ringstufe dient insbesondere zum Aufnehmen eines zwischen der Innenseite des Pumpenzylinders und der Außenseite des Pumpenkolbens abdichtenden Dichtrings. Der Dichtring kann dann ferner im Pumpenzylinder gegebenenfalls zusammen mit dem Pumpenkolben eine vorzumontierende Baugruppe bilden. Im derart vormontierten Zustand kann der Dichtring in die Sackbohrung des Pumpengehäuses eingeschoben werden, ohne beschädigt zu worden. Der Dichtring ist in dieser Einbaulage von der Ringstufe radial außen überdeckt und entsprechend innerhalb der Ringstufe geschützt. The ring stage which can likewise be produced at almost no additional cost serves, in particular, to receive a sealing ring sealing between the inside of the pump cylinder and the outside of the pump piston. The sealing ring can then optionally form a module to be pre-assembled together with the pump piston in the pump cylinder. In such pre-assembled Condition, the sealing ring can be inserted into the blind bore of the pump housing without being damaged. The sealing ring is covered in this installation position of the ring stage radially outside and protected accordingly within the ring stage.
Der Pumpenzylinder ist vorteilhaft mittels eines in die Sackbohrung gesetzten Führungsrings festgesetzt, der auch zum axialen Führen eines im Pumpenzylinder verschiebbaren Pumpenkolbens dient. The pump cylinder is advantageously fixed by means of a set in the blind bore guide ring, which also serves for axially guiding a displaceable in the pump cylinder pump piston.
Der derart montierte Führungsring entwickelt doppelt Wirkung. Erstens wirkt er als radial stützendes Führungsglied für den Pumpenkolben beim axialen Verschieben innerhalb des Pumpenkolbens. Zweitens dient der Führungsring als Haltering. Er verhindert, dass sich der Pumpenzylinder in der Sackbohrung axial verschieben kann. The thus mounted guide ring develops double effect. First, it acts as a radially supporting guide member for the pump piston during axial displacement within the pump piston. Second, the guide ring serves as a retaining ring. It prevents the pump cylinder from being able to move axially in the blind bore.
Ferner ist der Pumpenzylinder bevorzugt in der Sackbohrung mittels Verstem- men festgelegt, insbesondere mittels Verstemmen des Führungsrings. Furthermore, the pump cylinder is preferably fixed in the blind bore by means of clamping, in particular by caulking of the guide ring.
Der Arbeitsschritt des Verstemmens ist ein auch in der Großserienfertigung prozesssicher auszuführendes Verfahren. Mit diesem Verfahren können auf kostengünstige Weise die über die Lebensdauer der Pumpe hinweg erforderlichen Haltekräfte gewährleistet werden. Dies ist wie oben erläutert insbesondere der Fall, da sich die Verstemmung an der Niederdruckseite des Pumpenelements befindet. The caulking operation is a process that is also reliable in mass production. With this method, the holding forces required over the life of the pump can be ensured in a cost effective manner. As explained above, this is the case in particular, since the caulking is located on the low-pressure side of the pump element.
Die Sackbohrung ist bevorzugt mittels einer Bohrung ausgebildet, die durch die dann bereits ausgebildete Exzenteröffnung hindurch ausgebildet wird. The blind bore is preferably formed by means of a bore which is formed through the then already formed eccentric opening therethrough.
Bei dieser Weiterbildung wird zunächst die Exzenteröffnung gebohrt und nachfolgend durch diese hindurch die Sackbohrung hergestellt. Die Sackbohrung kann dabei auch in einem weit innen liegenden Bereich des Ventilgehäuses ausgebildet werden. In this development, the eccentric opening is first drilled and subsequently the blind bore is produced through it. The blind bore can also be formed in a far inner region of the valve housing.
Verschlossen wird die Sackbohrung bevorzugt an der Außenseite des Pumpengehäuses, insbesondere mittels Einpressen eines Blindstopfens. Mit dem derartigen Verschließen ist das Ventilgehäuse auch an seiner Außenseite dauerhaft abgedichtet und gegen einen möglichen Austritt von Bremsflüssigkeit gesichert. The blind bore is preferably closed on the outside of the pump housing, in particular by means of pressing in a blanking plug. With the closure of this type, the valve housing is also permanently sealed on its outside and secured against a possible escape of brake fluid.
Nachfolgend wird ein Ausführungsbeispiel der erfindungsgemäßen Lösung anhand der beigefügten schematischen Zeichnungen näher erläutert. Es zeigt: An exemplary embodiment of the solution according to the invention will be explained in more detail below with reference to the attached schematic drawings. It shows:
Fig. 1 einen Längsschnitt einer Pumpe gemäß dem Stand der Technik,1 shows a longitudinal section of a pump according to the prior art,
Fig. 2 einen Längsschnitt eines Ausführungsbeispiels einer Pumpe mit einemFig. 2 is a longitudinal section of an embodiment of a pump with a
Pumpenzylinder gemäß der Erfindung im eingebauten Zustand, Fig. 3 das Detail III in Fig. 2. Pump cylinder according to the invention in the installed state, Fig. 3 shows the detail III in Fig. 2nd
In Fig. 1 ist eine Pumpe 10 in Gestalt einer Kolbenpumpe für eine nicht weiter dargestellte hydraulische Fahrzeugbremsanlage veranschaulicht, die zum Erzeugen eines Fluiddrucks von Bremsfluid innerhalb der Fahrzeugbremsanlage dient. Die Pumpe 10 weist einen als Drehteil hergestellten, becherförmigen Pumpenzylinder 12 auf, in dem gegen eine Schraubenfeder 14 ein Pumpenkolben 16 verschiebbar gelagert ist. Der Pumpenkolben 16 fördert das Bremsfluid durch eine im Bodenbereich des Pumpenzylinders 12 ausgebildete, kreisrunde Ventilöffnung 17 eines Auslassventils 18 in eine nachfolgende Abströmung 20. Das Auslassventil 18 weist einen mit einer Schraubenfeder 21 federnd vorgespannten Schließkörper 22 auf. Um Bremsfluid in den Pumpenzylinder 12 einzusaugen, ist an dessen Umfang als separates Bauteil ein Ringfilter 24 angeordnet, auf den in Strömungsrichtung ein am Pumpenkolben 16 angeordnetes Einlassventil 26 folgt. Der Pumpenkolben 16 ist an seiner Niederdruckseite mittels eines Dichtrings 28 gegen ein Pumpengehäuse 30 hin abgedichtet. In Fig. 1, a pump 10 is illustrated in the form of a piston pump for a hydraulic vehicle brake system, not shown, which serves to generate a fluid pressure of brake fluid within the vehicle brake system. The pump 10 has a cup-shaped pump cylinder 12, which is produced as a turned part and in which a pump piston 16 is displaceably mounted against a helical spring 14. The pump piston 16 conveys the brake fluid through a circular valve opening 17 of an outlet valve 18 formed in the bottom region of the pump cylinder 12 into a subsequent outflow 20. The outlet valve 18 has a closing body 22 which is spring-biased by a helical spring 21. In order to suck brake fluid into the pump cylinder 12, a ring filter 24 is arranged on its circumference as a separate component, followed by an inlet valve 26 arranged on the pump piston 16 in the flow direction. The pump piston 16 is sealed at its low pressure side by means of a sealing ring 28 against a pump housing 30 through.
In den Fig. 2 und 3 ist eine erfindungsgemäße Pumpe 10 dargestellt, bei der ein zugehöriger Pumpenzylinder 32 mittels Tiefziehen hergestellt ist. Der Tiefziehvorgang ist ausgehend von einem Blech als Rohling ausgeführt worden, wobei insbesondere eine becherförmige Grundform mit einer Ringwand 34 und einer Bodenfläche 36 gestaltet worden ist. Die Ringwand 34 ist vergleichsweise dünn und damit anfällig gegen Ausbeulen gestaltet, liegt aber mit ihrer Außenseite großflächig im Pumpengehäuse 30 an, so dass Druckkräfte auf das Pumpengehäuse 30 übertragen werden. An dem dünnwandigen Material des Rohlings sind vor dem Tiefziehen im Bereich der Bodenfläche 36 eine Ventilöffnung 38 für das Auslassventil 18 sowie im Bereich der Ringwand 34 viele vergleichsweise kleine Zulauföffnungen 40 ausgestanzt worden. Mit diesen Zulauföffnungen 40 ist an dem dann fertig tiefgezoge- nen Pumpenzylinder 32 ein Filtersieb hergestellt worden, dass für dessen Zulauf das heranströmende Bremsfluid filtern kann. 2 and 3, a pump 10 according to the invention is shown in which an associated pump cylinder 32 is made by deep drawing. The deep-drawing process has been carried out starting from a sheet as a blank, in particular a cup-shaped basic shape having an annular wall 34 and a bottom surface 36 has been designed. The annular wall 34 is comparatively thin and thus prone to buckling, but lies with its outer side over a large area in the pump housing 30, so that compressive forces are transmitted to the pump housing 30. On the thin-walled material of the blank, a valve opening 38 for the outlet valve 18 as well as many comparatively small inlet openings 40 have been punched out in the region of the bottom surface 36 prior to deep-drawing. With these inlet openings 40, a filter screen has been produced on the pump cylinder 32, which is then completely deep-drawn, and can filter the inflowing brake fluid for its inflow.
An dem Ende der Ringwand 34, das der Bodenfläche 36 gegenüberliegt, ist beim Tiefziehen eine Ringstufe 42 ausgebildet worden. Von dieser Ringstufe 42 über- deckt eine Ringscheibe 39 den Dichtring 28 radial und eine weitere Ringwand 41 auch axial. Der Dichtring 28 ist auf diese Weise gegen äußere mechanische Einflüsse geschützt. At the end of the annular wall 34, which is opposite to the bottom surface 36, an annular step 42 has been formed during deep drawing. Of this annular step 42 covers an annular disc 39, the sealing ring 28 radially and a further annular wall 41 also axially. The sealing ring 28 is protected in this way against external mechanical influences.
Die Pumpe 10 gemäß den Fig. 2 und 3 ist wie folgt hergestellt worden: Zunächst ist das Pumpengehäuse 30 bereitgestellt und in ihm eine Sackbohrung 44 mit einem Boden 45, einem ersten Absatz 47, einem zweiten Absatz 49 und einem dritten Absatz 51 ausgebildet worden. Die Sackbohrung 44 erstreckt sich dabei von der Oberfläche des quaderförmigen Pumpengehäuses 30 aus in dieses hinein und durch einen Bereich einer Exzenteröffnung 46 hindurch, die in dem Pum- pengehäuse 30 wahlweise vor oder nach der Sackbohrung 44 ausgebildet worden ist. Die Exzenteröffnung 46 dient im Betrieb der Pumpe 10 zum Aufnehmen eines weiter nicht dargestellten Antriebsexzenters für den Pumpenkolben 16. The pump 10 according to FIGS. 2 and 3 has been produced as follows: First, the pump housing 30 has been provided and in it a blind bore 44 having a bottom 45, a first shoulder 47, a second shoulder 49 and a third shoulder 51 has been formed. The blind bore 44 extends from the surface of the cuboid pump housing 30 into it and through a region of an eccentric opening 46, which has been formed in the pump housing 30 either before or after the blind bore 44. The eccentric opening 46 is used during operation of the pump 10 for receiving a drive eccentric, not shown further for the pump piston 16th
In die Sackbohrung 44 ist dann der tiefgezogene Pumpenzylinders 32 mit seiner Bodenfläche 36 an den Absatz 47 und mit seiner Ringstufe 42 an den Absatz 49 eingesetzt worden. An seinem offenen Ende ist der Pumpenzylinder 32 mittels einer Verstemmung 48 an dem Absatz 51 festgesetzt worden, der sich an dem zur Exzenteröffnung 46 hin offenen Endbereich der Sackbohrung 44 befindet. Mit der Verstemmung 48 ist dabei ein im Querschnitt L-förmiger Führungsring 50 mit verstemmtem Material in der Sackbohrung 44 rückgehalten worden, der zuvor auf den Pumpenkolben 16 aufgeschoben und gegen die weitere Ringwand 41 des tiefgezogenen Pumpenzylinders 32 stirnseitig angelegt worden war. In the blind bore 44 then the deep-drawn pump cylinder 32 has been used with its bottom surface 36 to the paragraph 47 and its annular step 42 to the paragraph 49. At its open end, the pump cylinder 32 has been fixed by means of a caulking 48 on the shoulder 51, which is located at the end opening of the blind bore 44 which is open towards the eccentric opening 46. With the caulking 48 while a cross-sectionally L-shaped guide ring 50 has been retained with caulked material in the blind bore 44, which had previously been pushed onto the pump piston 16 and against the other annular wall 41 of the deep-drawn pump cylinder 32 was frontally created.
Vor dem Anordnen des Pumpenzylinders 32 sind am Grund der Sackbohrung 44 zwischen deren Boden 45 und der Bodenfläche 36 des Pumpenzylinders 32 fer- ner noch Bauteile des Auslassventils 18, nämlich dessen Schraubenfeder 21 und dessen Schließkörper 22, eingesetzt worden. Before arranging the pump cylinder 32, at the bottom of the blind bore 44 between its bottom 45 and the bottom surface 36 of the pump cylinder 32 are located ner still components of the exhaust valve 18, namely the coil spring 21 and the closing body 22, have been used.
Die Sackbohrung 44 ist nach Beendigung der Montage des Pumpenzylinders 32 insbesondere mit darin vormontiertem, zugehörigem Pumpenkolben 16 mittels eines Blindstopfens 52 verschlossen worden, der an der Außenseite des Pumpengehäuses 30 in die Sackbohrung 44 eingepresst worden ist. The blind bore 44 has been closed after completion of the assembly of the pump cylinder 32 in particular with pre-assembled, associated pump piston 16 by means of a blind plug 52 which has been pressed into the blind bore 44 on the outside of the pump housing 30.

Claims

Ansprüche claims
Pumpe (10), insbesondere für eine Fahrzeugbremsanlage, mit Pump (10), in particular for a vehicle brake system, with
- einem Pumpengehäuse (30),  a pump housing (30),
- einer Sackbohrung (44) in dem Pumpengehäuse (30), die ausgehend von einem Bereich im Pumpengehäuse (30) ausgebildet ist, in dem eine Exzenteröffnung (46) zum Aufnehmen eines Antriebsexzenters vorgesehen ist, und - A blind bore (44) in the pump housing (30) which is formed starting from a region in the pump housing (30) in which an eccentric opening (46) is provided for receiving a drive eccentric, and
- einem in der Sackbohrung (44) vom Bereich der Exzenteröffnung (46) aus eingesetzten Pumpenzylinder (32), der in der Sackbohrung (44) vom Bereich der Exzenteröffnung (46) aus festgesetzt ist. - One in the blind bore (44) from the region of the eccentric opening (46) used from the pump cylinder (32) which is fixed in the blind bore (44) from the region of the eccentric opening (46).
Pumpe nach Anspruch 1 , Pump according to claim 1,
bei der zwischen einem Boden (45) der Sackbohrung (44) Bauteile (21 ; 22) eines Auslassventils (18) angeordnet sind.  in which between a bottom (45) of the blind bore (44) components (21; 22) of an outlet valve (18) are arranged.
Pumpe nach Anspruch 1 oder 2, Pump according to claim 1 or 2,
bei der der Pumpenzylinder (32) ein Tiefziehteil ist.  in which the pump cylinder (32) is a deep-drawn part.
Pumpe nach einem der Ansprüche 1 bis 3, Pump according to one of claims 1 to 3,
bei der der Pumpenzylinder (32) in Becherform mit einer Ringwand (34) und einer Bodenfläche (36) ausgebildet ist.  wherein the pump cylinder (32) is in cup form with an annular wall (34) and a bottom surface (36).
Pumpe nach einem der Ansprüche 1 bis 4, Pump according to one of claims 1 to 4,
bei der der Pumpenzylinder (32) mit einer dem Bereich der Exzenteröffnung (46) zugewandten Ringscheibe (39) gestaltet ist.  in which the pump cylinder (32) is designed with an annular disc (39) facing the region of the eccentric opening (46).
Pumpe nach einem der Ansprüche 1 bis 5, Pump according to one of claims 1 to 5,
bei der der Pumpenzylinder (32) mittels eines in die Sackbohrung (44) gesetzten Führungsrings (50) zum axialen Führen eines im Pumpenzylinder (32) verschiebbaren Pumpenkolbens (16) festgesetzt ist. in which the pump cylinder (32) is fixed by means of a guide ring (50) set in the blind bore (44) for axially guiding a pump piston (16) displaceable in the pump cylinder (32).
7. Verfahren zum Herstellen einer Pumpe (10), insbesondere für eine Fahrzeugbremsanlage, mit den Schritten: 7. A method for producing a pump (10), in particular for a vehicle brake system, comprising the steps:
- Bereitstellen eines Pumpengehäuses (30),  Providing a pump housing (30),
- Ausbilden einer Sackbohrung (44) in dem Pumpengehäuse (30) ausgehend von einem Bereich im Pumpengehäuse (30), in dem eine Exzenteröffnung (46) zum Aufnehmen eines Antriebsexzenters vorgesehen ist,  - forming a blind bore (44) in the pump housing (30) starting from a region in the pump housing (30) in which an eccentric opening (46) is provided for receiving a drive eccentric,
- Einsetzen eines Pumpenzylinders (32) in die Sackbohrung (44) vom Bereich der Exzenteröffnung (46) aus und  - Inserting a pump cylinder (32) in the blind bore (44) from the region of the eccentric opening (46) and
- Festsetzen des Pumpenzylinders (32) in der Sackbohrung (44) vom Bereich der Exzenteröffnung (46) aus.  - Setting the pump cylinder (32) in the blind bore (44) from the region of the eccentric opening (46).
8. Verfahren nach Anspruch 7, 8. The method according to claim 7,
mit dem Schritt: Anordnen von Bauteilen eines Auslassventils (18) in der Sackbohrung (44) vor dem Schritt des Einsetzens des Pumpenzylinders (32) in die Sackbohrung (44).  including the step of placing components of an exhaust valve (18) in the blind bore (44) prior to the step of inserting the pump cylinder (32) into the blind bore (44).
9. Verfahren nach Anspruch 7 oder 8, 9. The method according to claim 7 or 8,
mit dem Schritt: Ausbilden des Pumpenzylinders (32) mittels Tiefziehen.  with the step of forming the pump cylinder (32) by deep drawing.
10. Verfahren nach einem der Ansprüche 7 bis 9, 10. The method according to any one of claims 7 to 9,
mit dem Schritt: Ausbilden mindestens einer Öffnung (38; 40) in dem Pumpenzylinder (32), insbesondere zeitlich vor dem Schritt des Tiefziehens des Pumpenzylinders (32).  with the step of forming at least one orifice (38; 40) in the pump cylinder (32), in particular prior to the step of drawing the pump cylinder (32).
1 1 . Verfahren nach einem der Ansprüche 7 bis 10, 1 1. Method according to one of claims 7 to 10,
mit dem Schritt: Ausbilden der Sackbohrung (44) mittels einer Bohrung, die durch die dann bereits ausgebildete Exzenteröffnung (46) hindurch ausgebildet wird.  with the step: forming the blind bore (44) by means of a bore which is formed through the then already formed eccentric opening (46) therethrough.
PCT/EP2011/062858 2010-09-24 2011-07-27 Pump and method for its manufacture WO2012038119A1 (en)

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KR1020137007286A KR20130133172A (en) 2010-09-24 2011-07-27 Pump and method for its manufacture
CN201180046022.6A CN103118912B (en) 2010-09-24 2011-07-27 Pump and the method manufacturing pump
JP2013529586A JP2013540939A (en) 2010-09-24 2011-07-27 Pump and method of manufacturing the pump
EP11735877.0A EP2619055A1 (en) 2010-09-24 2011-07-27 Pump and method for its manufacture
US13/825,821 US20130302191A1 (en) 2010-09-24 2011-07-27 Pump and method for its manufacture

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DE102017216014A1 (en) * 2017-09-12 2019-03-14 Robert Bosch Gmbh Hydraulic unit of a vehicle brake system with an eccentric chamber
IT201800002995A1 (en) * 2018-02-23 2019-08-23 Comet Spa Piston pump with simplified head
JP2019190395A (en) * 2018-04-26 2019-10-31 株式会社アドヴィックス Piston pump

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CN103118912B (en) 2016-08-17
CN103118912A (en) 2013-05-22
US20130302191A1 (en) 2013-11-14
DE102010041310A1 (en) 2012-03-29

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