US20130243629A1 - Pump having a pump cylinder - Google Patents

Pump having a pump cylinder Download PDF

Info

Publication number
US20130243629A1
US20130243629A1 US13/823,016 US201113823016A US2013243629A1 US 20130243629 A1 US20130243629 A1 US 20130243629A1 US 201113823016 A US201113823016 A US 201113823016A US 2013243629 A1 US2013243629 A1 US 2013243629A1
Authority
US
United States
Prior art keywords
pump
produced
cylinder
pump cylinder
deep drawing
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US13/823,016
Inventor
Andreas Schubitschew
Oliver Gaertner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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
Priority to DE201010040701 priority Critical patent/DE102010040701A1/en
Priority to DE102010040701.1 priority
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to PCT/EP2011/062223 priority patent/WO2012034737A1/en
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GAERTNER, OLIVER, SCHUBITSCHEW, ANDREAS
Publication of US20130243629A1 publication Critical patent/US20130243629A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00Pumping installations or systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE 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
    • B60T8/00Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32Arrangements 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
    • B60T8/34Arrangements 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
    • B60T8/40Arrangements 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
    • B60T8/4031Pump units characterised by their construction or mounting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404Details or component parts
    • F04B1/0421Cylinders
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/122Cylinder block
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162Adaptations of cylinders
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49229Prime mover or fluid pump making
    • Y10T29/49236Fluid pump or compressor making

Abstract

A pump, in particular for a vehicle brake system, includes a pump piston which is guided displaceably in a pump cylinder. The pump cylinder is produced by deep drawing.

Description

    PRIOR ART
  • The invention relates to a pump, in particular a piston pump for a vehicle brake system, having a pump piston, which is guided displaceably in a pump cylinder. The invention further relates to a vehicle brake system having a pump of this type and also to a method for producing such a pump.
  • A pump of this type is known for example from DE 199 28 913 A1. It comprises a pump housing, in which, as an individual pump element or pump unit, a pump piston is mounted displaceably in a pump cylinder. Here, the pump piston draws a brake fluid through an inlet opening into the pump cylinder and conveys it out from the pump cylinder through an outlet opening.
  • The object of the present invention is to create a pump that can be produced and assembled in a cost-effective manner.
  • DISCLOSURE OF THE INVENTION
  • A pump, in particular for a vehicle brake system, which is formed with a pump piston, which is guided displaceably in a pump cylinder, is created in accordance with the invention. Here, the pump cylinder is produced specifically by means of deep drawing.
  • Deep drawing is a production method that is very cost-effective in principle because a high degree of deformation with simultaneously high dimensional accuracy can be provided with this method by means of an individual deep drawing or pressing process carried out on a workpiece. However, deep drawing generally means that only very thin-walled workpieces can be processed and produced. These workpieces then have comparatively low resistance or rigidity accordingly with respect to compressive load and in particular with respect to buckling, which actually makes them seemingly unsuitable for the use as pump cylinders.
  • The invention is based on the finding that a deep-drawn pump cylinder can still be used for a pump. The actual problem of low resistance or rigidity can be counterbalanced and completely compensated for, specifically by a further embodiment of the surrounding environment of the pump cylinder deep-drawn in this way.
  • In order to achieve the necessary rigidity, it is advantageous in particular if the pump cylinder is received in a pump housing in such a way that it is supported in a planar manner against the pump housing via its outer lateral surface. The support is particularly advantageously created by a fit with just a low fitting tolerance between the outer face of the pump cylinder and the inner face of the respective receiving opening in the pump housing. The fitting tolerance should be selected in such a way that the pump cylinder can still be inserted into the pump housing with reasonable pressing force, but in so doing still comes to bear against the pump housing substantially over its entire surface.
  • The pump cylinder is particularly preferably beaker-shaped with an annular wall and a base area.
  • Components of the respective pump unit, such as the pump piston with its respective inlet valve, can advantageously be preassembled in the pump cylinder of this type. The preassembly can be carried out cost-effectively in a workpiece support, in which the pump piston is first inserted, followed by the pump piston. Here, the direction of assembly remains the same, which is advantageous for workpiece-support-based assembly.
  • Furthermore, a valve opening with a valve body closing it selectively is preferably formed on the base area.
  • The valve opening arranged in this way can be produced particularly favorably in combination with the deep drawing process because the material region of the base area surrounding said valve opening does not have to be deformed during the deep drawing process itself or only has to be slightly deformed. The base area itself is generally only slightly deformed during the deep drawing process, whereas the material of the annular wall experiences a considerable deformation during the deep drawing process. With the only slightly deformed material region, it is ensured that the valve opening retains its dimensions, even throughout the service life of the respective valve.
  • With a preferred development of the pump according to the invention, at least one inlet opening to the pump piston is also formed on the annular wall.
  • The inlet opening of this type can be produced in the thin-walled material of the pump piston by a cost-effective punching process.
  • A multiplicity of inlet openings, by means of which a filter screen is formed, is particularly preferably formed on the annular wall.
  • A filter screen can be produced very cost-effectively by means of such a formation of many inlet openings on the pump cylinder since the multiplicity of openings can generally be produced by just one punching process.
  • Furthermore, there is then no longer any need for an additional component for the filter, and therefore the procurement costs and assembly costs can also be further reduced.
  • As already mentioned, the at least one opening of this type is particularly preferably produced by means of punching, since this manufacturing method can be carried out very cost-effectively. The punching process is carried out in particular before the pump cylinder has been produced by deep drawing. The punching process can then be carried out on the raw material of the pump cylinder, which is provided as a single sheet metal in substantially planar form. Alternatively or additionally, the opening can be produced by means of laser cutting or etching. The multiplicity of inlet openings themselves can thus be formed very cost-effectively and, at the same time, in a dimensionally accurate manner. The deformation, occurring during the deep drawing process, of the material region in which the inlet openings are located can be taken into account beforehand by a corresponding adaptation of the shape and dimensions of the openings to be punched.
  • An annular disk is preferably also formed at the end of the annular wall arranged opposite the base area.
  • The annular disk can be produced in a largely cost-neutral manner by means of the deep drawing process itself. It is advantageously used to support a ring seal, which is arranged next to said annular disc and is used to seal the axially moving pump piston with respect to its surrounding environment. The ring seal constitutes a low-pressure seal, which prevents fluid from escaping from the intake region of the pump piston.
  • Furthermore, an annular step, in which in particular a ring seal sealing between the pump piston and the pump cylinder is arranged, is preferably formed at the end of the annular wall arranged opposite the base area.
  • The annular step forms an assembly space for a ring seal, which is advantageously mounted at this point at the same time during the assembly steps and is also protected in this position against damage. The ring seal in particular produces a seal between the pump piston and the pump cylinder. With the solution of this type, a further seal between the pump piston and the pump housing surrounding it outside the pump cylinder can also be omitted since the pump cylinder is sealed with respect to the pump housing. This seal can advantageously be created by means of the pressing of the pump cylinder into the pump housing or by means of a caulking of the pump housing at the open end face of the pump cylinder.
  • The invention further comprises a vehicle brake system having a pump of this type.
  • Lastly, the invention also comprises a method for producing a pump having the following steps: forming at least one opening in a sheet metal, deep drawing the sheet metal to form a pump cylinder, in such a way that a valve opening and/or an inlet opening and/or an outlet opening of the pump cylinder is/are formed by the opening, and assembling a pump piston in the pump cylinder of this type. As explained above, these manufacturing steps are then preferably followed by the assembly of the pump cylinder in a pump housing.
  • An exemplary embodiment of the solution according to the invention will be explained in greater detail hereinafter on the basis of the accompanying schematic drawings, in which:
  • FIG. 1 shows a longitudinal sectional view of a pump according to the prior art,
  • FIG. 2 shows a longitudinal sectional view of a first exemplary embodiment of a pump with a pump cylinder according to the invention,
  • FIG. 3 shows a longitudinal view of the pump according to FIG. 2,
  • FIG. 4 shows a perspective view of the pump cylinder according to FIGS. 2 and 3, and
  • FIG. 5 shows a longitudinal sectional view of a second exemplary embodiment of a pump with a pump cylinder according to the invention.
  • In FIG. 1 a pump 10 in the form of a piston pump for a hydraulic vehicle brake system (not illustrated further) is illustrated and is used for generation of a fluid pressure of brake fluid within the vehicle brake system. To this end, the pump 10 has a beaker-shaped pump cylinder 12, which is produced as a rotary part and in which a pump piston 16 is mounted displaceably against a helical spring 14. The pump piston 16 conveys the brake fluid through an annular valve opening 17, formed in the base region of the pump cylinder 12, of an outlet valve 18 into a subsequent outflow 20. The outlet valve 18 has a spring-biased closure member 22. In order to draw brake fluid into the pump cylinder 12, a ring filter 24 is arranged as a separate component at the periphery of said pump cylinder and is followed in the direction of flow by an inlet valve 26 arranged on the pump piston 16. The pump piston 16 is sealed on its low-pressure side by means of a ring seal 28 with respect to a pump housing 30.
  • Pumps 10 according to the invention are illustrated in FIGS. 2 to 5, with which a respective pump cylinder 32 is produced specifically by means of deep drawing. The deep drawing process has been carried out starting from a sheet metal as a blank, wherein a beaker-shaped basic form with an annular wall 34 and a base area 36 has been produced in particular. Here, the annular wall is indeed relatively thin and thus susceptible to buckling caused by a high compressive load, but the pump housing 30 surrounding the pump cylinder 32 is formed in such a way that the annular wall 34 can be supported radially outwardly against the pump housing (see FIGS. 2 and 5), such that the pump cylinder 32 can likewise withstand high internal pressures.
  • A valve opening 38 for the outlet valve 18 and, in the region of the annular wall 34, many relatively small inlet openings 40 have been punched out beforehand from the thin-walled material of the blank in the region of the base area 36.
  • With the many inlet openings 40 of this type, a filter screen has been produced very cost-effectively at the pump cylinder 32, which is then deep-drawn and finished, and can filter oncoming brake fluid for the inlet thereof.
  • During the deep drawing process, an annular disk 42 has also been formed at the end of the annular wall 34 arranged opposite the base area 36. The annular disk 42 supports the ring seal 28 arranged next to it in the axial direction.
  • With the exemplary embodiment according to FIG. 5, an annular step 44 is formed at this end of the annular wall 34, the ring seal 28 also being covered in the radial direction by said annular step and thus protected.

Claims (18)

1. A pump, comprising:
a pump cylinder; and
a pump piston guided displaceably in the pump cylinder,
wherein the pump cylinder is produced by deep drawing.
2. The pump as claimed in claim 1, wherein the pump cylinder is received in a pump housing in such a way that it is supported in a planar manner against the pump housing via its outer lateral surface.
3. The pump as claimed in claim 1, wherein the pump cylinder is beaker-shaped and has an annular wall and a base area.
4. The pump as claimed in claim 3, wherein the base area defines a valve opening configured to be selectively closed by a valve body.
5. The pump as claimed in claim 3, wherein the annular wall defines at least one inlet opening to the pump piston.
6. The pump as claimed in claim 3, wherein the annular wall defines a multiplicity of inlet openings that form a filter screen on the annular wall.
7. The pump as claimed in claim 4, wherein the valve opening is produced by punching.
8. The pump as claimed in claim 3, wherein an annular disk is formed at the end of the annular wall arranged opposite the base area.
9. The pump as claimed in claim 3, wherein an annular step is formed at the end of the annular wall arranged opposite the base area.
10. A vehicle brake system, comprising:
a pump including:
a pump cylinder; and
a pump piston guided displaceably in the pump cylinder,
wherein the pump cylinder is produced by deep drawing.
11. A method for producing a pump, comprising:
forming at least one opening in a sheet metal;
deep drawing the sheet metal to form a pump cylinder, the sheet metal deep drawn in such a way that one or more of a valve opening, an inlet opening, and an outlet opening of the pump cylinder are formed by the opening; and
assembling a pump piston in the pump cylinder.
12. The pump as claimed in claim 1, wherein the pump is for a vehicle brake system.
13. The pump as claimed in claim 7, wherein the valve opening is produced by punching before the pump cylinder has been produced by deep drawing.
14. The pump as claimed in claim 5, wherein the at least one inlet opening is produced by punching.
15. The pump as claimed in claim 14, wherein the at least one inlet opening is produced by punching before the pump cylinder has been produced by deep drawing.
16. The pump as claimed in claim 6, wherein the multiplicity of inlet openings are produced by punching.
17. The pump as claimed in claim 16, wherein the multiplicity of inlet openings are produced by punching before the pump cylinder has been produced by deep drawing.
18. The pump as claimed in claim 9, further comprising a ring seal arranged between the pump piston and the annular step of the pump cylinder.
US13/823,016 2010-09-14 2011-07-18 Pump having a pump cylinder Abandoned US20130243629A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE201010040701 DE102010040701A1 (en) 2010-09-14 2010-09-14 Pump with a pump cylinder
DE102010040701.1 2010-09-14
PCT/EP2011/062223 WO2012034737A1 (en) 2010-09-14 2011-07-18 Pump having a pump cylinder

Publications (1)

Publication Number Publication Date
US20130243629A1 true US20130243629A1 (en) 2013-09-19

Family

ID=44629484

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/823,016 Abandoned US20130243629A1 (en) 2010-09-14 2011-07-18 Pump having a pump cylinder

Country Status (4)

Country Link
US (1) US20130243629A1 (en)
EP (1) EP2616680A1 (en)
DE (1) DE102010040701A1 (en)
WO (1) WO2012034737A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012223186A1 (en) * 2012-12-14 2014-06-18 Robert Bosch Gmbh Piston of a piston pump of a vehicle brake system
CN106438326B (en) * 2016-07-14 2019-11-12 河海大学 It is a kind of for the miniature intermittent pump of hydraulic fan cooling tower bearing lubrication and installation and working method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6042350A (en) * 1995-07-27 2000-03-28 Itt Manufacturing Enterprises Inc. Piston pump
US6079961A (en) * 1997-07-30 2000-06-27 Robert Bosch Gmbh Piston pump for a vehicle brake system having a plastic piston with a wear resistant cam-striking face
US6193481B1 (en) * 1997-05-21 2001-02-27 Robert Bosch Gmbh Piston pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492547A (en) * 1945-05-03 1949-12-27 Donald E Willard Air compressor
US4370918A (en) * 1980-03-24 1983-02-01 Pringle William L Fluid cylinder assembly
DE3323407C2 (en) * 1983-06-29 1986-12-11 Boge Gmbh, 5208 Eitorf, De
DE19928913A1 (en) 1999-06-24 2001-01-04 Bosch Gmbh Robert Piston pump
DE102008026218B4 (en) * 2008-05-30 2012-04-19 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Adjustable coolant pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6042350A (en) * 1995-07-27 2000-03-28 Itt Manufacturing Enterprises Inc. Piston pump
US6193481B1 (en) * 1997-05-21 2001-02-27 Robert Bosch Gmbh Piston pump
US6079961A (en) * 1997-07-30 2000-06-27 Robert Bosch Gmbh Piston pump for a vehicle brake system having a plastic piston with a wear resistant cam-striking face

Also Published As

Publication number Publication date
EP2616680A1 (en) 2013-07-24
DE102010040701A1 (en) 2012-03-15
WO2012034737A1 (en) 2012-03-22

Similar Documents

Publication Publication Date Title
CN103867522B (en) Fluid pressure cylinder
US8833321B2 (en) Cylinder head cover module with integrated valve train
JP5382551B2 (en) High pressure pump
KR100757284B1 (en) Piston pump
DE102011117856A1 (en) Multi-piece, joined rotors in hydraulic camshaft adjusters with joining sealing profiles and method for producing the rotors
KR101741852B1 (en) Tappet
CN102449349B (en) For the cam follower roller device of fuel-injection pump
US20110110807A1 (en) High-pressure pump
EP2714480B1 (en) Solenoid valve, in particular for slip-controlled motor vehicle braking systems
US8955550B2 (en) Damper device
US20130340695A1 (en) Roller lifter for internal combustion engine
US9109560B2 (en) High pressure pump
US8235018B2 (en) Tappet
US7390174B2 (en) Piston pump
DE102012112481A1 (en) Check valve for connecting rod of engine, has valve closing body, which is movable to and fro for showing valve seat along valve longitudinal axis, where radial inlet-or flow direction is provided in relation to valve longitudinal axis
DE102004002489B4 (en) Fluid pump, in particular high-pressure fuel pump
JP4143841B2 (en) Piston pump
KR20000068948A (en) Non-return valve, especially for a piston pump
DE102007000071B4 (en) Filter, piston pump, which uses the filter, and method of mounting the filter in a valve seat member of the piston pump
US20070102052A1 (en) Accumulator
US20090232690A1 (en) Seal apparatus of gear pump
DE10295941B3 (en) Solenoid valve
DE10252231A1 (en) Solenoid valve, in particular for slip-controlled motor vehicle brake systems
DE102005053674B4 (en) Process for the production of steel housings made of at least two housing components of units installed in vehicles
DE19820902A1 (en) Piston pump for a vehicle hydraulic brake system

Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHUBITSCHEW, ANDREAS;GAERTNER, OLIVER;REEL/FRAME:030633/0222

Effective date: 20130508

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION