US20010016171A1 - Piston pump for a brake system - Google Patents
Piston pump for a brake system Download PDFInfo
- Publication number
- US20010016171A1 US20010016171A1 US09/269,559 US26955999A US2001016171A1 US 20010016171 A1 US20010016171 A1 US 20010016171A1 US 26955999 A US26955999 A US 26955999A US 2001016171 A1 US2001016171 A1 US 2001016171A1
- Authority
- US
- United States
- Prior art keywords
- bush
- closure part
- piston
- piston pump
- pump
- 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.)
- Granted
Links
- 210000002445 nipple Anatomy 0.000 claims description 13
- 239000011324 bead Substances 0.000 claims description 2
- 238000003780 insertion Methods 0.000 abstract description 6
- 230000037431 insertion Effects 0.000 abstract description 6
- 238000007373 indentation Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000002788 crimping Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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
- F04B53/16—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
-
- 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
- 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
- F04B53/20—Filtering
Definitions
- the invention relates to a piston pump as generically defined by the preamble to the main claim.
- the piston pump of the invention is intended in particular as a pump in a brake system of a vehicle and is used to control the pressure in wheel brake cylinders.
- ABS the abbreviations ABS, ASR, FDR and EHB are used for such brake systems.
- the pump serves for instance to return brake fluid from a wheel brake cylinder or a plurality of wheel brake cylinders to a master cylinder (ABS) and/or to pump brake fluid out of a supply container into a wheel brake cylinder or a plurality of wheel brake cylinders (ASR or FDR or EHB).
- a brake system with wheel slip control ABS or ASR
- a brake system serving as a steering aid FDR
- EHB electrohydraulic brake system
- the pump is needed.
- ABS or ASR wheel slip control
- locking of the wheels of the vehicle during a braking event involving strong pressure on the brake pedal (ABS) and/or spinning of the driven wheels of the vehicle in the event of strong pressure on the gas pedal (ASR) can for instance be prevented.
- a brake pressure is built up in one or more wheel brake cylinders independently of an actuation of the brake pedal or gas pedal, for instance to prevent the vehicle from breaking out of the track desired by the driver.
- the pump can also be used in an electrohydraulic brake system (EHB), in which the pump pumps the brake fluid into the wheel brake cylinder or wheel brake cylinders if an electric brake pedal sensor detects an actuation of the brake pedal, or in which the pump is used to fill a reservoir of the brake system.
- EHB electrohydraulic brake system
- One such piston pump is known from German Patent Disclosure DE 40 27 794 A1.
- the known piston pump has a piston which is guided axially displaceably in a bush that is inserted into a cylinder bore of a pump housing. On one face end of the bush, the cylinder bore is closed by a closure part, which is inserted in pressure-tight fashion into the cylinder bore of the pump housing. Before insertion into the pump housing, the closure part is joined to the bush by crimping, resulting in an easily manipulated preassembled unit that is simple to insert into pump housing.
- a disadvantage is that the closure part must be joined to the bush in an additional work step.
- the closure part and the bush are joined together by means of a snap or detent connection.
- This has the advantage that the bush and the closure part are joined together by simply being put together before insertion into the pump housing.
- An additional connection operation for instance crimping as known from the prior art, is dispensed with.
- the bush and the closure part form an easily manipulated preassembled unit, which can be inserted into the pump housing simply, for instance by press-fitting.
- connection between the closure part and the bush Since the connection between the closure part and the bush has only a secondary function, it must hold the closure part on the bush until the piston pump has been inserted into the pump housing; then an approximately aligned orientation of the closure part and the bush suffices, and sealing between the closure part and the bush is unnecessary, so that a snap or detent connection suffices.
- the closure part and the bush After insertion into the pump housing, the closure part and the bush are held in a position aligned with one another by the pump housing; sealing exists between the pump housing and the bush, or the closure part.
- the connection between the closure part and the bush has no further importance once these two parts have been inserted into the pump housing.
- a snap connection which can be undone again by pulling the closure part and the bush apart, suffices to connect the closure part to the bush.
- a detent connection that cannot be done is equally suitable for connecting the closure part to the bush.
- FIG. 1 an axial section through a piston pump of the invention.
- FIG. 2 an axial section through a closure part of the piston pump of the invention, on a larger scale.
- the piston pump of the invention identified by reference numeral 10 , and shown in FIG. 1 is inserted into a stepped cylinder bore 12 , which is mounted in a hydraulic block that forms a pump housing 14 .
- the hydraulic block of which only a fraction surrounding the piston pump 10 is shown in the drawing, is part of a slip-controlled hydraulic vehicle brake system, not otherwise shown.
- Also inserted into the block, besides the piston pump 10 are such other hydraulic components as magnet valves or pressure reservoirs, which are hydraulically connected in the block to one another and to the piston pump 10 of the invention.
- the piston pump 10 has a piston 16 , one end of which, remote from a positive-displacement chamber 18 , protrudes from a bush 26 and is guided in the pump housing 14 with a guide ring 20 and sealed off by a sealing ring 22 . Another end of the piston 16 , toward the positive-displacement chamber 18 , is located in the bush 26 and is guided in the bush 26 of the piston pump 10 by a guide ring 24 and sealed off by a sealing ring 28 .
- the bush 26 is inserted with a press fit into the cylinder bore 12 of the pump housing 14 . The press fit brings about sealing between the inlet and outlet sides, that is, the low- and high-pressure sides of the piston pump 10 .
- an axial blind bore 30 is made in the piston 16 from the side toward the positive-displacement chamber; near its bottom, it is intersected by transverse bores 32 .
- the blind and transverse bores 30 , 32 communicate through windows 34 in a circumferential wall 36 of the bush 26 with an inflow bore 38 which is made radially to the piston pump 10 in the hydraulic block forming the pump housing 14 .
- a check valve is mounted as an inlet valve 40 : the inlet valve 40 has a valve ball 42 as its valve closing body, which cooperates with a conical valve seat 44 mounted at an orifice of the blind bore 30 of the piston 16 .
- a helical compression spring as the 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 received in a valve housing 48 , which is made as a cup-shaped deep-drawn sheet-metal part with a diameter approximately equivalent to the diameter of the piston 16 and which is provided with flow openings 50 .
- the valve housing 48 has an annular shoulder 52 , with which it rests on a face end of the piston 16 toward the positive-displacement chamber 18 . It has an outward-protruding radial flange 54 integral with it, against which a helical compression spring as a piston restoring spring 56 presses and in this way keeps the valve housing 48 against the piston 16 .
- the radial flange 54 at the same time holds the guide ring 24 and the sealing ring 28 axially on the piston 16 a between itself and a support ring 60 supported on an annular shoulder 58 of the piston 16 .
- the piston restoring spring 56 is considerably stronger than the valve closing spring 46 .
- the piston restoring spring 56 holds the valve housing 48 on the piston 16 counter to the force of the valve closing spring 46 .
- the piston restoring spring 56 presses the piston 16 axially against an eccentric element 62 , which can be driven by an electric motor and serves in a manner known per se to drive the piston 16 to execute a reciprocating stroke motion.
- the bush 26 On a side toward the positive-displacement chamber, the bush 26 has a bush bottom 64 , which is integral with it and in which a continuous center hole 66 for the pump outlet is made.
- a closure part 68 which takes the form of a cylindrical plug, is inserted into the cylinder bore 12 and secured by a caulking 70 and sealed off in fluid tight fashion in the pump housing 14 .
- the closure part 68 holds the bush 26 in the cylinder bore 12 .
- the closure part 68 is joined to the bush 26 via a snap connection: On its bush bottom 64 , the bush 26 has a radial collar 72 , which forms an undercut 74 on its side remote from the closure part 68 .
- the bush 26 is inserted with its bush bottom 64 into a cylindrical indentation 76 in the face end of the closure part 68 toward the bush 26 .
- the radial collar 72 on the bush bottom 64 is located inside a hollow-cylindrical edge 78 of the closure part 68 that surrounds the cylindrical indentation 76 .
- Three radially inward-protruding snap-on nipples 80 are impressed into the hollow-cylindrical edge 78 , distributed over the circumference; they engage the radial collar 72 of the bush 26 from behind and in this way keep the closure part 68 on the bush bottom 64 .
- Joining the closure part 68 to the bush 26 is effected by simply pressing these two parts together; a chamfer 82 on the radial collar 72 of the bush 26 elastically widens the hollow-cylindrical edge 78 at the snap-on nipples 80 , until the snap-on nipples 80 have overcome the radial collar 72 and engage it from behind.
- a single snap bead extending all the way around may be formed (not shown) on the edge 78 of the closure part 68 .
- the closure part 68 can be made either by metal-cutting methods or without metal-cutting, for instance by upsetting.
- the snap-on nipples 80 can be made, after the production of the hollow-cylindrical edge 78 of the closure part 68 , by axially pressing on a deforming tool, not shown and hereafter referred to as a bell, which grips the hollow-cylindrical edge 78 and has three inward-protruding cams that shape the snap-on nipples 80 . No counterpart tool which counter-holds the hollow-cylindrical edge 78 from the inside is needed for the purpose.
- Another option for producing the snap-on nipples 80 is to introduce a die, not shown, into the cylindrical indentation 76 ; this die has recesses on its circumference that are complementary to the snap-on nipples 80 .
- the snap-on nipples 80 are formed into these recesses, for instance by means of the bell described in the previous paragraph. Once the bell is pulled off, the die can be pulled out of the cylindrical indentation 76 because of the elasticity of the hollow-cylindrical edge 78 .
- This way of producing the snap-on nipples 80 , when the closure part 68 is produced by deforming, has the advantage that the snap-on nipples 80 can be made in a single operation jointly with the closure part 68 .
- the die described, which is introduced into the cylindrical indentation 76 is in this case part of a multi-part deforming tool, not shown.
- the die forms the indentation 76 and preferably also the blind bore 84 by means of an extension on the die.
- the closure part 68 is joined to the bush 26 before insertion into the pump housing 14 .
- Connecting the closure part 68 to the bush 26 creates a preassembled unit that is easy to manipulate. Connecting the closure part 68 to the bush 26 is important only until these two parts are inserted into the pump housing 14 , because after the insertion into and caulking in the pump housing 14 , the bush 26 and closure part 68 are held on one another and aligned with one another by the pump housing 14 .
- An axial blind bore 84 is made in the closure part 68 on a bottom of the cylindrical indentation 76 , and a check valve acting as an outlet valve 86 is accommodated in this bore and cooperates with a conical valve seat 88 , which is made at an orifice, toward the closure part 68 , of the center hole 66 in the bush bottom 64 .
- a valve ball 90 is inserted as a valve closing body into the blind bore 84 of the closure part 68 and is pressed against the valve seat 88 by a helical compression spring acting as a valve closing spring 92 .
- a radial groove 94 is made in the bottom of the cylindrical indentation 76 of the closure part 68 ; it discharges into the blind bore 84 that receives the outlet valve 86 , and it passes through the hollow-cylindrical edge 78 of the closure part 68 .
- the radial groove 94 communicates via an annular conduit 96 with an outlet bore 98 made in the pump housing 14 .
Abstract
Description
- The invention relates to a piston pump as generically defined by the preamble to the main claim.
- The piston pump of the invention is intended in particular as a pump in a brake system of a vehicle and is used to control the pressure in wheel brake cylinders. Depending on the type of brake system, the abbreviations ABS, ASR, FDR and EHB are used for such brake systems. In the brake system, the pump serves for instance to return brake fluid from a wheel brake cylinder or a plurality of wheel brake cylinders to a master cylinder (ABS) and/or to pump brake fluid out of a supply container into a wheel brake cylinder or a plurality of wheel brake cylinders (ASR or FDR or EHB). In a brake system with wheel slip control (ABS or ASR) and/or a brake system serving as a steering aid (FDR) and/or an electrohydraulic brake system (EHB), the pump is needed. With the wheel slip control (ABS or ASR), locking of the wheels of the vehicle during a braking event involving strong pressure on the brake pedal (ABS) and/or spinning of the driven wheels of the vehicle in the event of strong pressure on the gas pedal (ASR) can for instance be prevented. In a brake system serving as a steering aid (FDR), a brake pressure is built up in one or more wheel brake cylinders independently of an actuation of the brake pedal or gas pedal, for instance to prevent the vehicle from breaking out of the track desired by the driver. The pump can also be used in an electrohydraulic brake system (EHB), in which the pump pumps the brake fluid into the wheel brake cylinder or wheel brake cylinders if an electric brake pedal sensor detects an actuation of the brake pedal, or in which the pump is used to fill a reservoir of the brake system.
- One such piston pump is known from German
Patent Disclosure DE 40 27 794 A1. The known piston pump has a piston which is guided axially displaceably in a bush that is inserted into a cylinder bore of a pump housing. On one face end of the bush, the cylinder bore is closed by a closure part, which is inserted in pressure-tight fashion into the cylinder bore of the pump housing. Before insertion into the pump housing, the closure part is joined to the bush by crimping, resulting in an easily manipulated preassembled unit that is simple to insert into pump housing. A disadvantage is that the closure part must be joined to the bush in an additional work step. - In the piston pump of the invention as defined by claim1, the closure part and the bush are joined together by means of a snap or detent connection. This has the advantage that the bush and the closure part are joined together by simply being put together before insertion into the pump housing. An additional connection operation, for instance crimping as known from the prior art, is dispensed with. The bush and the closure part form an easily manipulated preassembled unit, which can be inserted into the pump housing simply, for instance by press-fitting. Since the connection between the closure part and the bush has only a secondary function, it must hold the closure part on the bush until the piston pump has been inserted into the pump housing; then an approximately aligned orientation of the closure part and the bush suffices, and sealing between the closure part and the bush is unnecessary, so that a snap or detent connection suffices. After insertion into the pump housing, the closure part and the bush are held in a position aligned with one another by the pump housing; sealing exists between the pump housing and the bush, or the closure part. The connection between the closure part and the bush has no further importance once these two parts have been inserted into the pump housing. A snap connection, which can be undone again by pulling the closure part and the bush apart, suffices to connect the closure part to the bush. A detent connection that cannot be done is equally suitable for connecting the closure part to the bush.
- Advantageous features and refinements of the invention defined by the main claim are the subject of the dependent claims.
- The invention will be described in further detail in terms of an exemplary embodiment shown in the drawing. Shown are:
- FIG. 1, an axial section through a piston pump of the invention; and
- FIG. 2, an axial section through a closure part of the piston pump of the invention, on a larger scale.
- The piston pump of the invention, identified by
reference numeral 10, and shown in FIG. 1 is inserted into astepped cylinder bore 12, which is mounted in a hydraulic block that forms apump housing 14. The hydraulic block, of which only a fraction surrounding thepiston pump 10 is shown in the drawing, is part of a slip-controlled hydraulic vehicle brake system, not otherwise shown. Also inserted into the block, besides thepiston pump 10, are such other hydraulic components as magnet valves or pressure reservoirs, which are hydraulically connected in the block to one another and to thepiston pump 10 of the invention. - The
piston pump 10 has apiston 16, one end of which, remote from a positive-displacement chamber 18, protrudes from abush 26 and is guided in thepump housing 14 with aguide ring 20 and sealed off by a sealingring 22. Another end of thepiston 16, toward the positive-displacement chamber 18, is located in thebush 26 and is guided in thebush 26 of thepiston pump 10 by aguide ring 24 and sealed off by a sealingring 28. Thebush 26 is inserted with a press fit into thecylinder bore 12 of thepump housing 14. The press fit brings about sealing between the inlet and outlet sides, that is, the low- and high-pressure sides of thepiston pump 10. - For the pump inlet, an axial
blind bore 30 is made in thepiston 16 from the side toward the positive-displacement chamber; near its bottom, it is intersected bytransverse bores 32. The blind andtransverse bores windows 34 in acircumferential wall 36 of thebush 26 with aninflow bore 38 which is made radially to thepiston pump 10 in the hydraulic block forming thepump housing 14. - On the end of the
piston 16 toward the positive-displacement chamber, a check valve is mounted as an inlet valve 40: theinlet valve 40 has avalve ball 42 as its valve closing body, which cooperates with aconical valve seat 44 mounted at an orifice of theblind bore 30 of thepiston 16. A helical compression spring as thevalve closing spring 46 presses thevalve ball 42 against thevalve seat 44. Thevalve ball 42 and thevalve closing spring 46 are received in avalve housing 48, which is made as a cup-shaped deep-drawn sheet-metal part with a diameter approximately equivalent to the diameter of thepiston 16 and which is provided withflow openings 50. Thevalve housing 48 has anannular shoulder 52, with which it rests on a face end of thepiston 16 toward the positive-displacement chamber 18. It has an outward-protrudingradial flange 54 integral with it, against which a helical compression spring as apiston restoring spring 56 presses and in this way keeps thevalve housing 48 against thepiston 16. Theradial flange 54 at the same time holds theguide ring 24 and the sealingring 28 axially on the piston 16 a between itself and asupport ring 60 supported on anannular shoulder 58 of thepiston 16. Thepiston restoring spring 56 is considerably stronger than thevalve closing spring 46. Thepiston restoring spring 56 holds thevalve housing 48 on thepiston 16 counter to the force of thevalve closing spring 46. - Via the
radial flange 54 of thevalve housing 48, thepiston restoring spring 56 presses thepiston 16 axially against aneccentric element 62, which can be driven by an electric motor and serves in a manner known per se to drive thepiston 16 to execute a reciprocating stroke motion. - On a side toward the positive-displacement chamber, the
bush 26 has abush bottom 64, which is integral with it and in which a continuous center hole 66 for the pump outlet is made. - On the side toward the positive-displacement chamber, a
closure part 68, which takes the form of a cylindrical plug, is inserted into thecylinder bore 12 and secured by acaulking 70 and sealed off in fluid tight fashion in thepump housing 14. At the same time, theclosure part 68 holds thebush 26 in the cylinder bore 12. - The
closure part 68 is joined to thebush 26 via a snap connection: On itsbush bottom 64, thebush 26 has aradial collar 72, which forms an undercut 74 on its side remote from theclosure part 68. Thebush 26 is inserted with itsbush bottom 64 into acylindrical indentation 76 in the face end of theclosure part 68 toward thebush 26. Theradial collar 72 on thebush bottom 64 is located inside a hollow-cylindrical edge 78 of theclosure part 68 that surrounds thecylindrical indentation 76. - Three radially inward-protruding snap-on
nipples 80 are impressed into the hollow-cylindrical edge 78, distributed over the circumference; they engage theradial collar 72 of thebush 26 from behind and in this way keep theclosure part 68 on thebush bottom 64. Joining theclosure part 68 to thebush 26 is effected by simply pressing these two parts together; achamfer 82 on theradial collar 72 of thebush 26 elastically widens the hollow-cylindrical edge 78 at the snap-onnipples 80, until the snap-onnipples 80 have overcome theradial collar 72 and engage it from behind. Instead of individual snap-onnipples 80, a single snap bead extending all the way around may be formed (not shown) on theedge 78 of theclosure part 68. - The
closure part 68 can be made either by metal-cutting methods or without metal-cutting, for instance by upsetting. The snap-onnipples 80 can be made, after the production of the hollow-cylindrical edge 78 of theclosure part 68, by axially pressing on a deforming tool, not shown and hereafter referred to as a bell, which grips the hollow-cylindrical edge 78 and has three inward-protruding cams that shape the snap-onnipples 80. No counterpart tool which counter-holds the hollow-cylindrical edge 78 from the inside is needed for the purpose. - Another option for producing the snap-on
nipples 80 is to introduce a die, not shown, into thecylindrical indentation 76; this die has recesses on its circumference that are complementary to the snap-onnipples 80. The snap-onnipples 80 are formed into these recesses, for instance by means of the bell described in the previous paragraph. Once the bell is pulled off, the die can be pulled out of thecylindrical indentation 76 because of the elasticity of the hollow-cylindrical edge 78. This way of producing the snap-onnipples 80, when theclosure part 68 is produced by deforming, has the advantage that the snap-onnipples 80 can be made in a single operation jointly with theclosure part 68. The die described, which is introduced into thecylindrical indentation 76, is in this case part of a multi-part deforming tool, not shown. The die forms theindentation 76 and preferably also the blind bore 84 by means of an extension on the die. - The
closure part 68 is joined to thebush 26 before insertion into thepump housing 14. Connecting theclosure part 68 to thebush 26 creates a preassembled unit that is easy to manipulate. Connecting theclosure part 68 to thebush 26 is important only until these two parts are inserted into thepump housing 14, because after the insertion into and caulking in thepump housing 14, thebush 26 andclosure part 68 are held on one another and aligned with one another by thepump housing 14. - An axial blind bore84 is made in the
closure part 68 on a bottom of thecylindrical indentation 76, and a check valve acting as anoutlet valve 86 is accommodated in this bore and cooperates with aconical valve seat 88, which is made at an orifice, toward theclosure part 68, of the center hole 66 in thebush bottom 64. Avalve ball 90 is inserted as a valve closing body into the blind bore 84 of theclosure part 68 and is pressed against thevalve seat 88 by a helical compression spring acting as avalve closing spring 92. - As the pump outlet, a
radial groove 94 is made in the bottom of thecylindrical indentation 76 of theclosure part 68; it discharges into the blind bore 84 that receives theoutlet valve 86, and it passes through the hollow-cylindrical edge 78 of theclosure part 68. Theradial groove 94 communicates via anannular conduit 96 with an outlet bore 98 made in thepump housing 14. - By means of the snap-on
nipples 80 on the relativelythin edge 78, a certain elasticity is engendered, viewed in the radial direction, between thebush 26 and theclosure part 68, so that when thebush 26 is installed together with theclosure part 68 in thepump housing 14, errors of alignment, which can never be entirely avoided, are easily compensated for.
Claims (6)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732818A DE19732818A1 (en) | 1997-07-30 | 1997-07-30 | Piston pump |
DE19732818 | 1997-07-30 | ||
DE19732818.0 | 1997-07-30 | ||
PCT/DE1998/001672 WO1999006708A1 (en) | 1997-07-30 | 1998-06-18 | Piston pump |
Publications (2)
Publication Number | Publication Date |
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US20010016171A1 true US20010016171A1 (en) | 2001-08-23 |
US6361295B2 US6361295B2 (en) | 2002-03-26 |
Family
ID=7837376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/269,559 Expired - Fee Related US6361295B2 (en) | 1997-07-30 | 1998-06-18 | Means for connecting a closure part to a bush of a piston pump for a brake system |
Country Status (5)
Country | Link |
---|---|
US (1) | US6361295B2 (en) |
EP (1) | EP0935712B1 (en) |
JP (1) | JP2001501280A (en) |
DE (2) | DE19732818A1 (en) |
WO (1) | WO1999006708A1 (en) |
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US20060013702A1 (en) * | 2002-10-26 | 2006-01-19 | Dieter Dinkel | Conveyor device |
US20080310971A1 (en) * | 2007-06-18 | 2008-12-18 | Tomoo Harada | Piston pump |
US20160272181A1 (en) * | 2015-03-21 | 2016-09-22 | Mando Corporation | Pump structure of electric integrated hydraulic brake device |
CN108150373A (en) * | 2017-12-22 | 2018-06-12 | 赛克思液压科技股份有限公司 | A kind of Highgrade integration rear cover structure of closed type hydraulic pump |
US10730496B2 (en) * | 2014-04-10 | 2020-08-04 | Robert Bosch Gmbh | Hydraulic unit |
US20230097493A1 (en) * | 2021-09-29 | 2023-03-30 | Chipmast Autotronix Co., Ltd. | Oil scavenge pump, hydraulic device having the same and method for assembling the same |
US20230104415A1 (en) * | 2021-09-29 | 2023-04-06 | Chipmast Autotronix Co., Ltd. | Oil-scavenge pump, hydraulic device having the same and method for assembling the same |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE19914065A1 (en) * | 1999-03-27 | 2000-09-28 | Bosch Gmbh Robert | Piston pump |
DE19928913A1 (en) * | 1999-06-24 | 2001-01-04 | Bosch Gmbh Robert | Piston pump |
US6792968B1 (en) * | 2000-05-30 | 2004-09-21 | Robert H. Breeden | Pump assembly and method |
US20050152363A1 (en) * | 2000-12-21 | 2005-07-14 | Bellsouth Intellectual Property Corporation | Disposable communications addresses |
US6589032B2 (en) * | 2001-07-13 | 2003-07-08 | Delphi Technologies, Inc. | Pump and pump piston assembly |
DE50309273D1 (en) * | 2002-09-24 | 2008-04-10 | Continental Teves Ag & Co Ohg | CONVEYOR |
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DE102006029368A1 (en) * | 2006-06-27 | 2008-01-03 | Robert Bosch Gmbh | Piston pump for a vehicle brake system with a sealing element |
DE102006048903A1 (en) * | 2006-10-17 | 2008-04-30 | Robert Bosch Gmbh | Pump for a vehicle brake system with a valve |
US20090057345A1 (en) * | 2007-08-31 | 2009-03-05 | Dukes Stephen A | Fluid dispenser |
DE102014212292A1 (en) * | 2014-06-26 | 2015-12-31 | Robert Bosch Gmbh | Exhaust valve with a receiving element |
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DE4028941A1 (en) * | 1990-03-03 | 1991-09-05 | Bosch Gmbh Robert | PRESSURE DELIVERY DEVICE WITH A PISTON PUMP |
DE4027794C2 (en) | 1990-09-01 | 2002-06-20 | Continental Teves Ag & Co Ohg | Hydraulic radial piston pump |
DE4136590A1 (en) * | 1991-11-07 | 1993-05-13 | Bosch Gmbh Robert | PUMP |
DE4243667A1 (en) * | 1992-12-23 | 1994-06-30 | Bosch Gmbh Robert | Piston pump for hydraulic system with non-return type inlet valve |
WO1995003198A1 (en) * | 1993-07-23 | 1995-02-02 | Itt Automotive Europe Gmbh | Hydraulic braking system with skid and drive slip control |
DE4426945A1 (en) * | 1994-07-29 | 1996-02-01 | Bosch Gmbh Robert | Piston pump |
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DE59708191D1 (en) * | 1996-09-19 | 2002-10-17 | Bosch Gmbh Robert | PISTON PUMP |
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1997
- 1997-07-30 DE DE19732818A patent/DE19732818A1/en not_active Withdrawn
-
1998
- 1998-06-18 US US09/269,559 patent/US6361295B2/en not_active Expired - Fee Related
- 1998-06-18 JP JP11510351A patent/JP2001501280A/en active Pending
- 1998-06-18 DE DE59807309T patent/DE59807309D1/en not_active Expired - Lifetime
- 1998-06-18 EP EP98936215A patent/EP0935712B1/en not_active Expired - Lifetime
- 1998-06-18 WO PCT/DE1998/001672 patent/WO1999006708A1/en active IP Right Grant
Cited By (12)
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US20060013702A1 (en) * | 2002-10-26 | 2006-01-19 | Dieter Dinkel | Conveyor device |
US7478998B2 (en) * | 2002-10-26 | 2009-01-20 | Continental Teves Ag & Co. Ohg | Conveyor device |
US20080310971A1 (en) * | 2007-06-18 | 2008-12-18 | Tomoo Harada | Piston pump |
US7690899B2 (en) * | 2007-06-18 | 2010-04-06 | Advics Co., Ltd. | Piston pump |
US10730496B2 (en) * | 2014-04-10 | 2020-08-04 | Robert Bosch Gmbh | Hydraulic unit |
US20160272181A1 (en) * | 2015-03-21 | 2016-09-22 | Mando Corporation | Pump structure of electric integrated hydraulic brake device |
CN105984452A (en) * | 2015-03-21 | 2016-10-05 | 株式会社万都 | Pump structure of electric integrated hydraulic brake device |
CN108150373A (en) * | 2017-12-22 | 2018-06-12 | 赛克思液压科技股份有限公司 | A kind of Highgrade integration rear cover structure of closed type hydraulic pump |
US20230097493A1 (en) * | 2021-09-29 | 2023-03-30 | Chipmast Autotronix Co., Ltd. | Oil scavenge pump, hydraulic device having the same and method for assembling the same |
US20230104415A1 (en) * | 2021-09-29 | 2023-04-06 | Chipmast Autotronix Co., Ltd. | Oil-scavenge pump, hydraulic device having the same and method for assembling the same |
US11668291B2 (en) * | 2021-09-29 | 2023-06-06 | Chipmast Autotronix Co., Ltd. | Oil-scavenge pump and method for assembling the same |
US11781541B2 (en) * | 2021-09-29 | 2023-10-10 | Chipmast Autotronix Co., Ltd. | Oil-scavenge pump and method for assembling the same |
Also Published As
Publication number | Publication date |
---|---|
US6361295B2 (en) | 2002-03-26 |
DE19732818A1 (en) | 1999-02-04 |
JP2001501280A (en) | 2001-01-30 |
DE59807309D1 (en) | 2003-04-03 |
EP0935712A1 (en) | 1999-08-18 |
WO1999006708A1 (en) | 1999-02-11 |
EP0935712B1 (en) | 2003-02-26 |
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