US20140030128A1 - Piston pump having a cylinder barrel - Google Patents
Piston pump having a cylinder barrel Download PDFInfo
- Publication number
- US20140030128A1 US20140030128A1 US13/995,414 US201113995414A US2014030128A1 US 20140030128 A1 US20140030128 A1 US 20140030128A1 US 201113995414 A US201113995414 A US 201113995414A US 2014030128 A1 US2014030128 A1 US 2014030128A1
- Authority
- US
- United States
- Prior art keywords
- liner
- piston
- piston pump
- outlet valve
- closure element
- 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
Links
Images
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
- 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
- F04B53/10—Valves; Arrangement of valves
- F04B53/1002—Ball valves
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Definitions
- the invention relates to a piston pump for delivering fluids, having a piston which can be driven to perform a reciprocating stroke movement, and a liner in which the piston is received so that it is axially displaceable, and a displacement chamber arranged in the liner between an inlet valve and an outlet valve, wherein the outlet valve is arranged on a liner base.
- Piston pumps of various designs are known. They are used in motor vehicles having vehicle hydraulic brake systems.
- the known piston pumps comprise an inlet valve, an outlet valve and a displacement, working or delivery chamber, which is arranged between the inlet valve and the outlet valve.
- the displacement chamber is arranged in a pump cylinder, which here forms a liner and is usually of a substantially cup-shaped design.
- a passage opening, which is opened and closed by the outlet valve, is formed in a liner base of the pump cylinder.
- the outlet valve which is usually embodied as a non-return valve, is arranged in an outlet valve cover, which is mounted externally on the liner.
- An outflow into a delivery line, into which the then pressurized fluid, especially the brake fluid, is discharged, is furthermore formed in the outlet valve cover.
- the piston pump serves, for example, to return brake fluid from a wheel brake cylinder or from a plurality of wheel brake cylinders into a brake master cylinder and/or to deliver brake fluid from a reservoir into a wheel brake cylinder or into a plurality of wheel brake cylinders.
- the piston pump is needed in vehicle brake systems with wheel slip control (ABS or ASR), a traction control system (TCS) and/or in a brake system serving as a steering aid (FDR) and/or in an electro-hydraulic brake system (EHB) or an electronic stability program (ESP).
- ABS wheel slip control
- TCS traction control system
- FDR steering aid
- EHB electro-hydraulic brake system
- ESP electronic stability program
- DE 10 2006 027 555 A1 discloses a piston pump for delivering fluids, having a piston, a cylinder element and a delivery chamber arranged between an inlet valve and an outlet valve, wherein the outlet valve comprises a closing member, a pre-tensioning device and a disk element.
- the outlet valve is arranged in a cover and an outflow into a delivery line ensues via this cover.
- a sealing seat of the outlet valve is arranged on the disk element.
- a piston pump for delivering fluids, having a piston which can be driven to perform a reciprocating stroke movement, and a liner, in which the piston is received so that it is axially displaceable, and a displacement chamber arranged in the liner between an inlet valve and an outlet valve, wherein the outlet valve is arranged on a liner base.
- An annular extension of the liner which encloses an installation space for the outlet valve, is formed on the side st of the liner base remote from the displacement chamber.
- two functional units are combined in one single liner, that is to say a displacement chamber on the one hand and the fitting space for the outlet valve on the other.
- This measure also makes it possible to reduce the dimensional tolerances of the components, and therefore to reduce the noise generated.
- the hydraulic piston pump comprises a cylindrical piston, which in a liner of substantially cup-shaped design is supported so that it can be run into and out of a cylinder bore.
- the liner is inserted, in particular, into a cylinder bore of a pump housing of the piston pump in a hydraulic unit.
- Inside the cylinder bore of the liner a fluid-filled delivery area or delivery chamber is provided between an inlet valve and an outlet valve.
- a vacuum is built up in the delivery area and the piston sucks fluid into the delivery area via the inlet valve.
- the piston displaces the fluid out of the delivery area via the outlet valve into the hydraulic system for performing work.
- a passage opening which is opened and closed by the outlet valve, is formed in the base of the liner.
- the outlet valve comprises a closing member, which is advantageously embodied as a ball or plate.
- the liner is preferably combined with an annular extension or the latter is subsequently formed onto the liner as a hollow cylindrical continuation on the liner, in order to then accommodate the outlet valve inside the hollow cylindrical continuation.
- This has the advantage that components such as the closing member, the spring and noise damping means can be arranged inside the hollow cylindrical continuation from the outlet valve-side, as part of a simple assembly process, which is performed in the opposite direction to the usual one.
- the outlet valve which is preferably embodied as a non-return valve, is arranged in the part of the extension joined onto the liner, and an outflow into a delivery line of an associated pump housing is furthermore formed in the extension.
- the outflow is advantageously formed by means of a circumferential recess and a radial duct.
- the circumferential recess is preferably formed on the liner on the side remote from the displacement chamber, and the radial duct preferably connects the installation space of the outlet valve to the recess.
- the outlet valve here advantageously comprises the closing member, a pre-tensioning device for pre-tensioning the closing member and a base element for supporting the pre-tensioning device.
- the liner of the piston pump may be of longer design dimensions, thereby additionally affording further space in the area of the outlet valve for any damping measures.
- a closure element in the form of a closure cap is advantageously attached to the annular extension.
- the closure element is advantageously caulked into the liner and for its part caulked in the pump housing itself.
- the closure element may also just be attached to the extension of the liner and caulked only in the pump housing, in order to create a fluid-tight and force-absorbing positional safeguard for the closure element in this area.
- Overall the closure element is integrated into the liner and the two combined with one another to form one unit, so that unwanted noises due to opening of the outlet valve are thereby already reduced.
- the integrated closure element which is preferably designed as an outlet valve cover or as an integrated closure cap of the outlet valve, is preferably made from aluminum. This affords external protection against corrosion and secure caulking in the pump housing.
- the aluminum has a ductility such that the caulking of the closure element in the housing wall of the liner can easily be achieved by positive interlock and frictional connection.
- FIG. 1 shows a longitudinal section of a piston pump according to the invention, having a liner and a closure element in the associated pump housing and
- FIG. 2 shows a perspective view of the liner together with a closure element of the piston pump according to FIG. 1 .
- FIG. 1 represents a piston pump 10 , which comprises a stepped cylinder bore 12 in a hydraulic unit, which forms a pump housing 14 .
- the hydraulic unit of which only a fragment surrounding the piston pump 10 is represented in the drawing, is an integral part of a vehicle hydraulic brake system with wheel-slip control, not represented further.
- further hydraulic components such as solenoid valves or pressure accumulators are incorporated therein and are hydraulically connected to one another and to the piston pump 10 according to the invention.
- the piston pump 10 comprises a piston 16 , one end of which, remote from the displacement chamber 18 , is guided in the pump housing 14 by a first guide ring 20 and sealed off by a sealing ring 22 .
- the other end of the piston 16 facing the displacement chamber 18 , is guided in a liner 26 of the piston pump 10 by a second guide ring 24 and sealed off by a sealing ring 28 .
- the liner 26 is inserted with a press fit into the cylinder bore 12 of the pump housing 14 .
- the press fit produces a seal between the inlet side and the outlet side, that is to say between the low-pressure side and the high-pressure side of the piston pump 10 .
- an axial blind bore 30 which is crossed by transverse bores 32 close to its base, is fitted in the piston 16 from a side facing the displacement chamber 18 .
- the blind bores and transverse bores 30 , 32 communicate with an admission bore 38 , which is inserted in the hydraulic unit forming the pump housing 14 radially to the piston pump 10 .
- a non-return valve is fitted as inlet valve 40 .
- the inlet valve 40 comprises a valve ball 42 , which interacts with a tapered valve seat 44 , which is inserted at an orifice of the blind bore 30 of the piston 16 .
- a helical compression spring as valve closing spring 46 presses the valve ball 42 against the valve seat 44 .
- the valve ball 42 and the valve closing spring 46 are accommodated in a valve housing 48 , which is made from sheet metal as a cup-shaped deep-drawn part having a diameter corresponding approximately to the diameter of the piston 16 , and is provided with flow passage openings 50 .
- the valve housing 48 has an annular step 52 , with which it bears on an end face of the piston 16 facing the displacement chamber 18 . It comprises an integral, externally projecting radial flange 54 , against which a helical compression spring serving as piston return spring 56 presses and in this way holds the valve housing 48 on the piston 16 . At the same time the radial flange 54 retains the guide ring 24 and the sealing ring 28 between it and a support ring 60 , resting on an annular shoulder 58 of the piston 16 , on the piston 16 in an axial direction.
- the piston return spring presses the piston 16 in an axial direction against an eccentric 62 , which can be driven by an electric motor and which serves for driving the piston 16 to perform a reciprocating stroke movement in a known manner.
- the liner 26 On a displacement chamber side the liner 26 comprises an integral liner base 64 , in which a central through-hole 66 is inserted for the pump outlet.
- the liner 26 is extended beyond this liner base 64 by a hollow cylindrical portion or annular extension 67 on its side remote from the displacement chamber 18 .
- the annular extension 67 comprises an installation space 69 , integral with the liner 26 , for an outlet valve 72 , which can be fitted in this installation space 69 on the liner 26 in reverse order.
- a closure element 68 Adjoining the annular extension 67 is a closure element 68 , which has the form of a closure cap, which is integrated into the annular extension 67 by pressing in a step 73 , and in so doing is inserted directly into the cylinder bore 12 .
- the closure element 68 is positively connected by a caulking 70 to the pump housing 14 and sealed fluid-tightly. The closure element 68 is thereby additionally also secured in the liner 26 .
- the closure element 68 is preferably formed from aluminum. This ensures external protection against corrosion and owing to the ductility of the aluminum affords a secure connection through the caulking 70 of the closure element 68 in the pump housing 14 .
- the outlet valve 72 is designed with a spherical closing member 74 and a return spring 76 as pre-tensioning device, and a damping device 78 as support and base element for the return spring 76 .
- the return spring 76 exerts a return force on the closing member 74 , so that this is pressed in the direction of the central hole 66 .
- the liner 26 has a radial duct 79 passing through it, which leads to an annular recess 80 , in particular an annular duct, formed on the outside thereof, for the fluid to flow out of the pump housing 14 through an outflow duct 82 when the outlet valve 72 is opened.
- the liner 26 is of extended design in order to afford additional space in conjunction with the integrated closure element 68 . Due to the integrated arrangement of the annular extension 67 in the form of a sleeve extension and the caulking of the closure element 68 directly in the liner 26 , however, the overall length of the piston pump 10 is not necessarily extended.
- the design of the piston pump 10 according to the invention with the liner 26 , the annular extension 67 and the integrated closure element 68 allows the closing member 74 , the return spring 76 and the damping device 78 to be easily fitted from the outlet valve-side.
- the liner 26 itself is machined during manufacture.
- the machining according to the invention for producing the liner 26 with the hollow cylindrical portion and the annular extension 67 is therefore not only feasible but also cost-neutral.
- the design according to the invention affords additional space for the installation of the damping device 78 .
- FIG. 2 shows an external view of the liner 26 with the annular extension 67 extended thereon and the integrated closure element 68 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
A piston pump for delivering fluids includes a piston configured to be driven to perform a reciprocating stroke movement. The piston pump includes a cylinder barrel in which the piston is held in an axially displaceable manner. The piston pump also includes a displacement chamber which is arranged in the cylinder barrel between an inlet valve and an outlet valve. The outlet valve is arranged on a cylinder barrel base, and, on a side of the cylinder barrel base which faces away from the displacement chamber, an annular projection is formed. The annular projection is configured to surround an installation space for the outlet valve.
Description
- The invention relates to a piston pump for delivering fluids, having a piston which can be driven to perform a reciprocating stroke movement, and a liner in which the piston is received so that it is axially displaceable, and a displacement chamber arranged in the liner between an inlet valve and an outlet valve, wherein the outlet valve is arranged on a liner base.
- Piston pumps of various designs are known. They are used in motor vehicles having vehicle hydraulic brake systems. The known piston pumps comprise an inlet valve, an outlet valve and a displacement, working or delivery chamber, which is arranged between the inlet valve and the outlet valve. The displacement chamber is arranged in a pump cylinder, which here forms a liner and is usually of a substantially cup-shaped design. A passage opening, which is opened and closed by the outlet valve, is formed in a liner base of the pump cylinder. Here the outlet valve, which is usually embodied as a non-return valve, is arranged in an outlet valve cover, which is mounted externally on the liner. An outflow into a delivery line, into which the then pressurized fluid, especially the brake fluid, is discharged, is furthermore formed in the outlet valve cover.
- In the brake system the piston pump serves, for example, to return brake fluid from a wheel brake cylinder or from a plurality of wheel brake cylinders into a brake master cylinder and/or to deliver brake fluid from a reservoir into a wheel brake cylinder or into a plurality of wheel brake cylinders.
- The piston pump is needed in vehicle brake systems with wheel slip control (ABS or ASR), a traction control system (TCS) and/or in a brake system serving as a steering aid (FDR) and/or in an electro-hydraulic brake system (EHB) or an electronic stability program (ESP).
- DE 10 2006 027 555 A1 discloses a piston pump for delivering fluids, having a piston, a cylinder element and a delivery chamber arranged between an inlet valve and an outlet valve, wherein the outlet valve comprises a closing member, a pre-tensioning device and a disk element. The outlet valve is arranged in a cover and an outflow into a delivery line ensues via this cover. A sealing seat of the outlet valve is arranged on the disk element.
- On opening of the outlet valve, unwanted noises can occur due to dimensional tolerances of the individual components. Efforts are therefore underway to optimize just such piston pumps as these, acting as ABS, ASR or ESP pump elements, with regard to their noise emissions and to improve the assembly of the individual sub-assemblies of such piston pumps.
- According to the invention a piston pump is created for delivering fluids, having a piston which can be driven to perform a reciprocating stroke movement, and a liner, in which the piston is received so that it is axially displaceable, and a displacement chamber arranged in the liner between an inlet valve and an outlet valve, wherein the outlet valve is arranged on a liner base. An annular extension of the liner, which encloses an installation space for the outlet valve, is formed on the side st of the liner base remote from the displacement chamber.
- According to the invention two functional units are combined in one single liner, that is to say a displacement chamber on the one hand and the fitting space for the outlet valve on the other. This simplifies the assembly of the inventive piston pump of a vehicle hydraulic brake system and also creates further space for damping measures or for a device used for damping.
- This measure also makes it possible to reduce the dimensional tolerances of the components, and therefore to reduce the noise generated.
- The hydraulic piston pump comprises a cylindrical piston, which in a liner of substantially cup-shaped design is supported so that it can be run into and out of a cylinder bore. The liner is inserted, in particular, into a cylinder bore of a pump housing of the piston pump in a hydraulic unit. Inside the cylinder bore of the liner a fluid-filled delivery area or delivery chamber is provided between an inlet valve and an outlet valve. When the piston runs out of the cylinder, a vacuum is built up in the delivery area and the piston sucks fluid into the delivery area via the inlet valve. When it runs in on the other hand, the piston displaces the fluid out of the delivery area via the outlet valve into the hydraulic system for performing work. A passage opening, which is opened and closed by the outlet valve, is formed in the base of the liner.
- The outlet valve comprises a closing member, which is advantageously embodied as a ball or plate. The liner is preferably combined with an annular extension or the latter is subsequently formed onto the liner as a hollow cylindrical continuation on the liner, in order to then accommodate the outlet valve inside the hollow cylindrical continuation. This has the advantage that components such as the closing member, the spring and noise damping means can be arranged inside the hollow cylindrical continuation from the outlet valve-side, as part of a simple assembly process, which is performed in the opposite direction to the usual one.
- Here the outlet valve, which is preferably embodied as a non-return valve, is arranged in the part of the extension joined onto the liner, and an outflow into a delivery line of an associated pump housing is furthermore formed in the extension. The outflow is advantageously formed by means of a circumferential recess and a radial duct. The circumferential recess is preferably formed on the liner on the side remote from the displacement chamber, and the radial duct preferably connects the installation space of the outlet valve to the recess. The outlet valve here advantageously comprises the closing member, a pre-tensioning device for pre-tensioning the closing member and a base element for supporting the pre-tensioning device.
- Here the liner of the piston pump may be of longer design dimensions, thereby additionally affording further space in the area of the outlet valve for any damping measures.
- A closure element in the form of a closure cap is advantageously attached to the annular extension. The closure element is advantageously caulked into the liner and for its part caulked in the pump housing itself. Alternatively the closure element may also just be attached to the extension of the liner and caulked only in the pump housing, in order to create a fluid-tight and force-absorbing positional safeguard for the closure element in this area. Overall the closure element is integrated into the liner and the two combined with one another to form one unit, so that unwanted noises due to opening of the outlet valve are thereby already reduced.
- The integrated closure element, which is preferably designed as an outlet valve cover or as an integrated closure cap of the outlet valve, is preferably made from aluminum. This affords external protection against corrosion and secure caulking in the pump housing. The aluminum has a ductility such that the caulking of the closure element in the housing wall of the liner can easily be achieved by positive interlock and frictional connection.
- An exemplary embodiment of the solution according to the invention is explained in more detail below with reference to the schematic drawings attached, of which:
-
FIG. 1 shows a longitudinal section of a piston pump according to the invention, having a liner and a closure element in the associated pump housing and -
FIG. 2 shows a perspective view of the liner together with a closure element of the piston pump according toFIG. 1 . -
FIG. 1 represents apiston pump 10, which comprises astepped cylinder bore 12 in a hydraulic unit, which forms apump housing 14. The hydraulic unit, of which only a fragment surrounding thepiston pump 10 is represented in the drawing, is an integral part of a vehicle hydraulic brake system with wheel-slip control, not represented further. Besides thepiston pump 10, further hydraulic components such as solenoid valves or pressure accumulators are incorporated therein and are hydraulically connected to one another and to thepiston pump 10 according to the invention. - The
piston pump 10 comprises apiston 16, one end of which, remote from thedisplacement chamber 18, is guided in thepump housing 14 by afirst guide ring 20 and sealed off by a sealingring 22. The other end of thepiston 16, facing thedisplacement chamber 18, is guided in aliner 26 of thepiston pump 10 by asecond guide ring 24 and sealed off by a sealingring 28. Theliner 26 is inserted with a press fit into thecylinder bore 12 of thepump housing 14. The press fit produces a seal between the inlet side and the outlet side, that is to say between the low-pressure side and the high-pressure side of thepiston pump 10. - For the pump inlet an axial
blind bore 30, which is crossed bytransverse bores 32 close to its base, is fitted in thepiston 16 from a side facing thedisplacement chamber 18. Throughwindows 34 in aperipheral wall 36 of theliner 26, the blind bores andtransverse bores admission bore 38, which is inserted in the hydraulic unit forming thepump housing 14 radially to thepiston pump 10. - At the displacement chamber end of the
piston 16, a non-return valve is fitted asinlet valve 40. As valve closing member theinlet valve 40 comprises avalve ball 42, which interacts with atapered valve seat 44, which is inserted at an orifice of theblind bore 30 of thepiston 16. A helical compression spring asvalve closing spring 46 presses thevalve ball 42 against thevalve seat 44. Thevalve ball 42 and thevalve closing spring 46 are accommodated in avalve housing 48, which is made from sheet metal as a cup-shaped deep-drawn part having a diameter corresponding approximately to the diameter of thepiston 16, and is provided withflow passage openings 50. Thevalve housing 48 has anannular step 52, with which it bears on an end face of thepiston 16 facing thedisplacement chamber 18. It comprises an integral, externally projectingradial flange 54, against which a helical compression spring serving aspiston return spring 56 presses and in this way holds thevalve housing 48 on thepiston 16. At the same time theradial flange 54 retains theguide ring 24 and thesealing ring 28 between it and asupport ring 60, resting on anannular shoulder 58 of thepiston 16, on thepiston 16 in an axial direction. - Via the
radial flange 54 of thevalve housing 48, the piston return spring presses thepiston 16 in an axial direction against an eccentric 62, which can be driven by an electric motor and which serves for driving thepiston 16 to perform a reciprocating stroke movement in a known manner. - On a displacement chamber side the
liner 26 comprises anintegral liner base 64, in which a central through-hole 66 is inserted for the pump outlet. Theliner 26 is extended beyond thisliner base 64 by a hollow cylindrical portion orannular extension 67 on its side remote from thedisplacement chamber 18. Theannular extension 67 comprises aninstallation space 69, integral with theliner 26, for anoutlet valve 72, which can be fitted in thisinstallation space 69 on theliner 26 in reverse order. - Adjoining the
annular extension 67 is aclosure element 68, which has the form of a closure cap, which is integrated into theannular extension 67 by pressing in astep 73, and in so doing is inserted directly into the cylinder bore 12. Theclosure element 68 is positively connected by acaulking 70 to thepump housing 14 and sealed fluid-tightly. Theclosure element 68 is thereby additionally also secured in theliner 26. - The
closure element 68 is preferably formed from aluminum. This ensures external protection against corrosion and owing to the ductility of the aluminum affords a secure connection through thecaulking 70 of theclosure element 68 in thepump housing 14. - The
outlet valve 72 is designed with aspherical closing member 74 and areturn spring 76 as pre-tensioning device, and a dampingdevice 78 as support and base element for thereturn spring 76. Thereturn spring 76 exerts a return force on the closingmember 74, so that this is pressed in the direction of thecentral hole 66. - The
liner 26 has aradial duct 79 passing through it, which leads to anannular recess 80, in particular an annular duct, formed on the outside thereof, for the fluid to flow out of thepump housing 14 through anoutflow duct 82 when theoutlet valve 72 is opened. - In its longitudinal extent, therefore, the
liner 26 is of extended design in order to afford additional space in conjunction with theintegrated closure element 68. Due to the integrated arrangement of theannular extension 67 in the form of a sleeve extension and the caulking of theclosure element 68 directly in theliner 26, however, the overall length of thepiston pump 10 is not necessarily extended. - The design of the
piston pump 10 according to the invention with theliner 26, theannular extension 67 and theintegrated closure element 68 allows the closingmember 74, thereturn spring 76 and the dampingdevice 78 to be easily fitted from the outlet valve-side. Theliner 26 itself is machined during manufacture. The machining according to the invention for producing theliner 26 with the hollow cylindrical portion and theannular extension 67 is therefore not only feasible but also cost-neutral. In addition, the design according to the invention affords additional space for the installation of the dampingdevice 78. -
FIG. 2 shows an external view of theliner 26 with theannular extension 67 extended thereon and theintegrated closure element 68. - Also externally visible are the
recess 80 for the outflow of fluid, which passes from inside the delivery chamber into therecess 80 through the radial duct 79 (not shown here). - All features represented in the description, the following claims and the drawings may be essential for the invention, both individually and in any combination with one another.
Claims (9)
1. A piston pump for delivering fluids, comprising:
a piston configured to be driven to perform a reciprocating stroke movement;
a liner configured to receive the piston such that the piston is axially displaceable;
a displacement chamber arranged in the liner between an inlet valve and an outlet valve; and
a liner base,
wherein the outlet valve is arranged on the liner base, and
wherein an annular extension of the liner is configured to enclose an installation space for the outlet valve, the annular extension formed on a side of the liner base that is remote from the displacement chamber.
2. The piston pump as claimed in claim 1 , further comprising a circumferential recess formed on the side of the liner base that is remote from the displacement chamber.
3. The piston pump as claimed in claim 2 , further comprising a radial duct configured to connect the installation space to the circumferential recess, the radial duct formed in the liner.
4. The piston pump as claimed in claim 1 , further comprising a closure element configured as a closure cap, the closure element attached to the annular extension.
5. The piston pump as claimed in claim 4 , wherein the closure element is made of aluminum.
6. The piston pump as claimed in claim 4 , wherein the closure element is produced by machining.
7. The piston pump as claimed in claim 4 , wherein the outlet valve includes:
a closing member;
a pre-tensioning device; and
a base element configured to support the pre-tensioning device.
8. The piston pump as claimed in claim 7 , wherein the closing member is a ball.
9. The piston pump as claimed in claim 7 , further comprising a space configured to accommodate a damping device, the space arranged between the closing member and the closure element.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010064084A DE102010064084A1 (en) | 2010-12-23 | 2010-12-23 | Piston pump with a bushing |
DE102010064084.0 | 2010-12-23 | ||
PCT/EP2011/068543 WO2012084300A1 (en) | 2010-12-23 | 2011-10-24 | Piston pump having a cylinder barrel |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140030128A1 true US20140030128A1 (en) | 2014-01-30 |
Family
ID=44936254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/995,414 Abandoned US20140030128A1 (en) | 2010-12-23 | 2011-10-24 | Piston pump having a cylinder barrel |
Country Status (6)
Country | Link |
---|---|
US (1) | US20140030128A1 (en) |
EP (1) | EP2655881A1 (en) |
JP (1) | JP2014503741A (en) |
CN (1) | CN103270299A (en) |
DE (1) | DE102010064084A1 (en) |
WO (1) | WO2012084300A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013224828A1 (en) | 2013-12-04 | 2015-06-11 | Robert Bosch Gmbh | Piston pump for a hydraulic vehicle brake system |
DE102017216900A1 (en) * | 2017-09-25 | 2019-03-28 | Robert Bosch Gmbh | Pressure medium control valve, in particular for controlling a flow direction in a pressure medium circuit and piston pump, in particular for the promotion of a pressure medium in an electronically slip-regulated vehicle brake system |
DE102021204716A1 (en) | 2021-05-10 | 2022-11-10 | Thyssenkrupp Ag | Radial piston pump, in particular radial piston compressor |
DE102021204713A1 (en) | 2021-05-10 | 2022-11-10 | Thyssenkrupp Ag | Radial piston pump and method for producing a radial piston pump |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6171083B1 (en) * | 1998-01-09 | 2001-01-09 | Robert Bosch Gmbh | Piston pump |
US6283724B1 (en) * | 1998-10-15 | 2001-09-04 | Robert Bosch Gmbh | Piston pump |
US7690899B2 (en) * | 2007-06-18 | 2010-04-06 | Advics Co., Ltd. | Piston pump |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4442737B4 (en) * | 1994-12-01 | 2007-06-14 | Robert Bosch Gmbh | piston pump |
JPH1182291A (en) * | 1997-08-29 | 1999-03-26 | Unisia Jecs Corp | Pumping device |
DE19928164A1 (en) * | 1999-06-19 | 2000-12-21 | Continental Teves Ag & Co Ohg | Reciprocating piston pump for electronically-regulating braking system has stepped piston with its larger diameter section displaced within pump capsule incorporating radial pressure valve |
JP4650629B2 (en) * | 2004-11-16 | 2011-03-16 | 株式会社アドヴィックス | Radial plunger pump |
DE102006027555A1 (en) | 2006-06-14 | 2007-12-20 | Robert Bosch Gmbh | Piston pump for e.g. conveying brake fluid in vehicle, has pressure chamber arranged between inlet valve and exhaust valve that includes base unit for supporting prestressing device and sealing seat that is arranged at disk unit |
-
2010
- 2010-12-23 DE DE102010064084A patent/DE102010064084A1/en active Pending
-
2011
- 2011-10-24 EP EP11773009.3A patent/EP2655881A1/en not_active Withdrawn
- 2011-10-24 JP JP2013545124A patent/JP2014503741A/en not_active Withdrawn
- 2011-10-24 CN CN2011800617129A patent/CN103270299A/en active Pending
- 2011-10-24 US US13/995,414 patent/US20140030128A1/en not_active Abandoned
- 2011-10-24 WO PCT/EP2011/068543 patent/WO2012084300A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6171083B1 (en) * | 1998-01-09 | 2001-01-09 | Robert Bosch Gmbh | Piston pump |
US6283724B1 (en) * | 1998-10-15 | 2001-09-04 | Robert Bosch Gmbh | Piston pump |
US7690899B2 (en) * | 2007-06-18 | 2010-04-06 | Advics Co., Ltd. | Piston pump |
Also Published As
Publication number | Publication date |
---|---|
DE102010064084A1 (en) | 2012-06-28 |
CN103270299A (en) | 2013-08-28 |
EP2655881A1 (en) | 2013-10-30 |
JP2014503741A (en) | 2014-02-13 |
WO2012084300A1 (en) | 2012-06-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6520756B1 (en) | Piston pump | |
US6457956B1 (en) | Piston pump | |
US6341950B1 (en) | Piston pump | |
US6334762B1 (en) | Piston pump including an easily produced flow conduit | |
US5213482A (en) | Hydraulic radial-type piston pump | |
US6224352B1 (en) | Piston pump in a brake system of a vehicle | |
US6283733B1 (en) | Piston pump for a vehicle brake system | |
US7390174B2 (en) | Piston pump | |
US8087911B2 (en) | Pump of electronically controlled brake system | |
US6126418A (en) | Piston pump | |
US8414276B2 (en) | Piston pump for a vehicle brake system with a sealing element | |
US6471496B1 (en) | Piston pump for a vehicle brake system | |
US8388325B2 (en) | Piston pump for a vehicle brake system, having a piston rod | |
US10730496B2 (en) | Hydraulic unit | |
JP2002514712A (en) | Piston pump | |
GB2327718A (en) | Reciprocating pump subassembly | |
US6361295B2 (en) | Means for connecting a closure part to a bush of a piston pump for a brake system | |
US20140030128A1 (en) | Piston pump having a cylinder barrel | |
JP4131573B2 (en) | Piston pump | |
JP2008518149A (en) | Piston pump | |
GB2366337A (en) | Piston pump with sealing ring | |
US20070092389A1 (en) | Piston pump | |
US8591209B2 (en) | Pump for a vehicle brake system having a valve | |
US8801408B2 (en) | Piston pump for a vehicle brake system | |
US20100098567A1 (en) | Piston pump |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ROBERT BOSCH GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GAERTNER, OLIVER;JAHN, HEIKO;ZIMMERMANN, MARC;AND OTHERS;SIGNING DATES FROM 20130826 TO 20130918;REEL/FRAME:031521/0962 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |