WO2017045808A1 - Bremskraftverstärker für ein kraftfahrzeug - Google Patents
Bremskraftverstärker für ein kraftfahrzeug Download PDFInfo
- Publication number
- WO2017045808A1 WO2017045808A1 PCT/EP2016/067040 EP2016067040W WO2017045808A1 WO 2017045808 A1 WO2017045808 A1 WO 2017045808A1 EP 2016067040 W EP2016067040 W EP 2016067040W WO 2017045808 A1 WO2017045808 A1 WO 2017045808A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- brake booster
- inner part
- outer part
- spindle nut
- booster according
- Prior art date
Links
Classifications
-
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2046—Screw mechanisms with gears arranged perpendicular to screw shaft axis, e.g. helical gears engaging tangentially the screw shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2081—Parallel arrangement of drive motor to screw axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
- F16H2025/249—Special materials or coatings for screws or nuts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
Definitions
- the invention relates to a brake booster for a master cylinder of a motor vehicle, with a drive motor which is connected by a transmission with a pressure piston for the master cylinder / connectable, wherein the transmission has a rotatable spindle nut with an internal thread and an axially displaceable, non-rotatable spindle rod with an external thread , wherein the internal thread with the external thread is engaged to a
- Brake booster and braking devices of the type mentioned are already known from the prior art.
- published patent application DE 10 2012 014 361 AI discloses a brake booster for a master cylinder of a motor vehicle, a drive motor and a drive motor with a pressure piston of the master cylinder
- the transmission has a portion which is formed as a spindle gear to a rotational movement of the
- the spindle gear has for this purpose a spindle nut with an internal thread and a spindle rod with an external thread, wherein the two threads are in engagement with each other to convert the rotational movement into a translational movement.
- the inventive embodiment of the brake booster ensures that the spindle nut of the transmission has a longer life and increases the reliability of the brake booster.
- the invention provides that the spindle nut in addition to the internal thread also has an external toothing. As a result, the spindle nut in particular can be driven directly by another gear.
- the invention allows the spindle nut to be used for a purpose other than just converting a rotational movement into a translational motion. According to the invention, it is provided that the
- Brake booster is made.
- the outer part is formed of a high-strength material, in particular of aluminum, steel, ceramic, of a fiber composite material and / or of a fiber-reinforced plastic.
- the outer part is particularly strong and allows high driving forces.
- the inner part of a low-friction and / or low-wear material in particular of
- Polyoxymethylene, polytetrafluoroethylene and / or polyamide is formed.
- the outer part and the inner part are axially positively connected with each other. This ensures in a simple manner that an axial load occurring during operation safely recorded or transmitted, and that the
- the axial positive engagement is formed by at least one bent-over holding section.
- the bent-over holding section can be part of the
- At least one bent-over holding section is arranged both on the inner part and on the outer part.
- a form-fitting element formed integrally with the respective part is provided, which ensures secure locking of the elements to one another.
- the respective holding portion is bent over in such a way that it axially overlaps the respective other part, inner part or outer part, in order to form the positive connection.
- the screw head is the other of the parts, is formed.
- this embodiment may be a posterior
- one of the parts can be dispensed with.
- one of the parts is expediently provided with a screw thread into which the screw can be screwed.
- the screw thread is arranged and the screw head of the screw designed such that the
- Screw head protrudes beyond the other part in the screwed state, thereby creating an axial positive connection between the two parts.
- the parts for non-rotatable connection with each other are non-positively, positively and / or cohesively connected to each other.
- the positive connection of the rotationally fixed connection is formed by at least one coupling pin, which rests positively in mutually oppositely arranged recesses of the inner part and the outer part.
- the outer part and the inner part thus each have at least one recess, in particular receiving groove, in which the coupling pin is radially inserted. If the two recesses face one another, then the coupling bolt is axially in the preferred at least one axial side
- Circumferential direction then takes place from one part to the other part through the coupling pin.
- a secure rotationally fixed connection between the outer part and the inner part is permanently ensured.
- Radial projection of one of the parts, which engages in a radial recess of the other of the parts is formed.
- Radial projection of one of the parts which engages in a radial recess of the other of the parts is formed.
- This embodiment can advantageously be dispensed with additional power transmission means.
- the production of outer part and inner part is indeed consuming, but this is a simple installation guaranteed.
- one part has a plurality of radially distributed uniformly distributed over its circumference radial projections and / or radial depressions, which are formed in the manner of a toothing in order to transmit high forces safely.
- Spindle nut is independent of the drive displaced. This can also be done in a fault, for example, in case of failure of the drive motor, a
- Figure 2 is an enlarged sectional view of a spindle nut
- FIG. 3 shows a first advantageous development of the spindle nut
- Figure 4 shows a further advantageous embodiment of the spindle nut
- FIGS. 5A to 5C show a further advantageous embodiment of the invention
- FIG. 1 shows, in a simplified representation, a brake booster 1 for a master brake cylinder, not illustrated here, of a motor vehicle.
- the brake booster 1 has a simplified representation here
- the spindle rod 4 is shown here only in sections in a longitudinal section.
- the Spindle rod 4 is formed as a hollow rod having an external thread 5. Axially, the spindle rod 4 is single-ended with the master cylinder, in particular with a pressure piston of the master cylinder, and at the other end with a brake pedal of the brake booster 1 having
- the spindle rod 4 is formed axially displaceable to exert a force on the master cylinder to actuate the brake pedal to its operation.
- a spindle nut 6 is rotatably arranged on the spindle rod 4, a spindle nut 6 is rotatably arranged.
- the spindle nut 6 has in sections an internal thread 7, which is in engagement with the external thread 5.
- the external thread 5 and the internal thread 7 are each formed as a trapezoidal thread.
- the external thread 5 extends axially seen over a more than twice as large section as the internal thread 7. If the spindle nut 6 in a
- the spindle nut 6 also has an outer toothing 10, with a plurality of axially over a shell outer surface of a sleeve-shaped
- Section of the spindle nut 6 extending teeth. Furthermore, the spindle nut 6 at one end to an axial stop 11, which has a cone-shaped longitudinal section.
- the transmission 3 furthermore has a drive ring gear 12, which has an internal toothing 13 which is in engagement with the external toothing 10.
- the spindle nut 6 is axially displaceable to the drive ring gear 12. Furthermore, the drive ring gear 12 has an external toothing, with which the drive ring gear 12 is operatively connected to an intermediate gear 14, which has a translation stage and with a
- Braking be initiated or the driver to be supported by generating an additional braking force. If the driver actuates the brake pedal faster than the electric motor 2 can react, or if the electric motor 2 or the brake booster 1 has a defect, then it is possible for the spindle rod 4 to move due to the axial displaceability of the brake rod
- Axial stop 11 rests against the drive ring gear 12 and another
- FIG. 1B shows in a cross-sectional view through the drive ring gear 12, an advantageous embodiment of the spindle nut 6.
- the spindle nut 6 is presently formed in two parts, with an outer part 17 and an inner part 18, which are fixedly connected to each other axially and in the direction of rotation.
- the outer part 17 has the outer toothing 10 and the inner part 18, the internal thread 7.
- the spindle rod 4 is not shown in FIG. 1B for reasons of clarity.
- the inner part 18 and the outer part 17 are each sleeve-shaped in this case and arranged concentrically with each other.
- FIG. 2 shows a longitudinal section of an enlarged section of the spindle nut 6. It can be seen that the outer part 17 is in the region of the
- Axial stop 11 has an enlarged inner diameter to form an axial recess 19.
- the inner part 18 is inserted with the internal thread 7, wherein the inner part 18 corresponds to the enlarged inner diameter at least substantially
- the Axialability 19 forms due to the enlarged inside diameter of an axial stop 20, to which the inner part 18 is inserted, as shown by an arrow.
- the outer part 17 is made of a high-strength material, such as aluminum or steel.
- the inner part 18 is presently made of a low-friction material, such as polyoxymethylene or polyamide. This is the
- the inner part 18 is glued into the outer part 17. It is also conceivable to weld outer part 17 and inner part 18 together. It is preferably provided that the outer part 17 and the inner part 18 are held positively against each other. In the axial direction, a first positive connection is already formed by an axial stop 20. In the other direction, a positive connection is also advantageously provided, as shown by way of example with reference to FIGS. 3 and 4.
- Figure 3 shows an embodiment in which the axial positive engagement is formed by a bent retaining portion 21 of the outer part 17.
- the outer part 17 on its front side over the entire circumference uninterrupted or intermittently extending web 22 which protrudes axially.
- at least one web 22 is provided, which extends at least partially axially over the circumference.
- FIG. 4 shows an alternative exemplary embodiment, in which it is provided that the outer part 17 has one or more openings with a screw thread 23 in its end face.
- the openings are radially as possible formed far inside or close to the enlarged inner diameter, so that a screwed into the thread 23 screw 24 with its screw head 25, the inserted into the Axialfact 19 inner part 18 overlaps.
- the inner part 18 and outer part 17 has an interlocking teeth through which a simple
- the inner part 18 or the outer part 17 may have a single radial projection, which engages in a corresponding, complementary thereto formed radial receptacle of the inner part 18.
- Figures 5A to 5C show an embodiment in which the positive connection in the direction of rotation is formed by additional elements. It is provided that the inner part 18 on its outer shell side 26 a plurality of evenly distributed over the circumference arranged recesses 27 in the form of longitudinal grooves which extend axially over the inner part 18, as shown in Figure 5A.
- Figure 5B shows a plan view of the outer part 17, which at its
- Shell inner side 28 having the enlarged inner diameter a plurality of circumferentially spaced recesses 29 in the form of longitudinal grooves extending axially has.
- the number of recesses 29 corresponds to the number and arrangement of the recesses 27 of the inner part 18. If the inner part 18 is inserted into the outer part 17, as shown in Figure 5C, so are the
- Recesses 29 and 27 in at least one rotational position of the inner part 18 in the outer part 17 opposite each other so that they together form an axial receptacle of the spindle nut 6.
- a coupling bolt 30 is inserted axially in accordance with FIG. 5C, as shown for example in FIGS. 5A and 5C.
- the cross section of the coupling pin 30 corresponds at least substantially to the cross section of the Axialaufsum, which are formed by the recesses 27 and 29.
- the coupling pin 30 is in the installed state according to Figure 5C both in the recess 27 and in the Recess 29 a, whereby a simple positive connection of the outer part 17 is ensured to the inner part 18.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Transmission Devices (AREA)
- Braking Systems And Boosters (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/759,804 US10543825B2 (en) | 2015-09-14 | 2016-07-18 | Brake booster for a motor vehicle |
JP2018510961A JP6568649B2 (ja) | 2015-09-14 | 2016-07-18 | 自動車のためのブレーキブースタ |
CN201680053025.5A CN108025725B (zh) | 2015-09-14 | 2016-07-18 | 用于机动车的制动力放大器 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015217547.2A DE102015217547A1 (de) | 2015-09-14 | 2015-09-14 | Bremskraftverstärker für ein Kraftfahrzeug |
DE102015217547.2 | 2015-09-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017045808A1 true WO2017045808A1 (de) | 2017-03-23 |
Family
ID=56511559
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2016/067040 WO2017045808A1 (de) | 2015-09-14 | 2016-07-18 | Bremskraftverstärker für ein kraftfahrzeug |
Country Status (5)
Country | Link |
---|---|
US (1) | US10543825B2 (de) |
JP (1) | JP6568649B2 (de) |
CN (1) | CN108025725B (de) |
DE (1) | DE102015217547A1 (de) |
WO (1) | WO2017045808A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015217530A1 (de) * | 2015-09-14 | 2017-03-16 | Robert Bosch Gmbh | Bremskraftverstärker für ein Kraftfahrzeug |
US11268607B1 (en) * | 2016-02-17 | 2022-03-08 | Helix Linear Technologies | Lead screw nuts having threads formed from different materials |
USD1016599S1 (en) | 2017-02-17 | 2024-03-05 | Helix Linear Technologies | Nut |
US10946852B2 (en) * | 2018-09-26 | 2021-03-16 | Toyota Motor Engineering & Manufacturing North America, Inc. | Systems and methods for determining engine start time during predicted acceleration events |
KR102632933B1 (ko) * | 2019-04-18 | 2024-02-05 | 현대모비스 주식회사 | 차량용 전동부스터 |
DE102019205972A1 (de) * | 2019-04-25 | 2020-10-29 | Robert Bosch Gmbh | Elektromechanischer Bremsdruckerzeuger für ein hydraulisches Bremssystem eines Fahrzeugs sowie Fahrzeug umfassend einen elektromechanischen Bremsdruckerzeuger |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0252700A2 (de) * | 1986-07-09 | 1988-01-13 | TranTek Inc. | Schnelles Transportsystem |
EP0277097A1 (de) * | 1987-01-21 | 1988-08-03 | IVECO FIAT S.p.A. | Elektromechanischer Linearantrieb zum Kippen der Fahrerkabine eines Nutzfahrzeuges |
DE19831940A1 (de) * | 1998-07-16 | 2000-01-20 | Alltec Gmbh | Verfahren zur Herstellung einer Gewindetriebmutter und Gewindetriebmutter |
DE102012014361A1 (de) * | 2012-07-20 | 2014-01-23 | Volkswagen Ag | Betätigungseinrichtung für einen Hauptbremszylinder eines Kraftfahrzeugs |
DE102013006795A1 (de) * | 2013-04-19 | 2014-10-23 | Volkswagen Aktiengesellschaft | Betätigungseinrichtung für eine Kraftfahrzeug-Bremsanlage |
DE102014101995A1 (de) * | 2014-02-18 | 2015-01-29 | Thyssenkrupp Presta Ag | Lenksäule für ein Kraftfahrzeug und Spindelmutter |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19755933C1 (de) * | 1997-12-17 | 1999-08-12 | Kuester & Co Gmbh | Feststellbremse für Fahrzeuge |
DE102007018469A1 (de) * | 2007-04-19 | 2008-10-23 | Robert Bosch Gmbh | Elektromechanischer Bremskraftverstärker |
JP5445837B2 (ja) | 2009-01-13 | 2014-03-19 | 株式会社アドヴィックス | ブレーキ装置 |
DE102009028034A1 (de) * | 2009-07-27 | 2011-02-03 | Robert Bosch Gmbh | Hydraulischer Hauptbremszylinder |
DE102009045857A1 (de) * | 2009-10-20 | 2011-04-21 | Robert Bosch Gmbh | Verfahren zur Herstellung einer Spindel für einen Spindeltrieb, Wälzgewindetrieb mit einer solchen Spindel und Verwendung des Wälzgewindetriebs |
DE102010001939B4 (de) * | 2010-02-15 | 2012-05-16 | Robert Bosch Gmbh | Bremskraftverstärker sowie Verfahren und Vorrichtung zu dessen Betrieb |
DE102011081966A1 (de) * | 2011-09-01 | 2013-03-07 | Robert Bosch Gmbh | Verfahren zur Herstellung eines Gewindeteils als Verbundteil, Wälzschraubtrieb, Linearaktuator, elektromechanischer Bremskraftverstärker mit einem solchen Verbundteil |
DE102014218051A1 (de) * | 2014-09-10 | 2016-03-10 | Robert Bosch Gmbh | Verfahren zum Dämpfen einer Torsion eines Gewindetriebs für einen elektromechanischen Bremskraftverstärker, Gewindetrieb für einen elektromechanischen Bremskraftverstärker und elektromechanischer Bremskraftverstärker |
DE102015217530A1 (de) * | 2015-09-14 | 2017-03-16 | Robert Bosch Gmbh | Bremskraftverstärker für ein Kraftfahrzeug |
DE102015217548A1 (de) * | 2015-09-14 | 2017-03-16 | Robert Bosch Gmbh | Bremskraftverstärker und Bremseinrichtung |
DE102015217531A1 (de) * | 2015-09-14 | 2017-03-16 | Robert Bosch Gmbh | Bremskraftverstärker, Bremseinrichtung |
-
2015
- 2015-09-14 DE DE102015217547.2A patent/DE102015217547A1/de active Pending
-
2016
- 2016-07-18 CN CN201680053025.5A patent/CN108025725B/zh active Active
- 2016-07-18 WO PCT/EP2016/067040 patent/WO2017045808A1/de active Application Filing
- 2016-07-18 JP JP2018510961A patent/JP6568649B2/ja active Active
- 2016-07-18 US US15/759,804 patent/US10543825B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0252700A2 (de) * | 1986-07-09 | 1988-01-13 | TranTek Inc. | Schnelles Transportsystem |
EP0277097A1 (de) * | 1987-01-21 | 1988-08-03 | IVECO FIAT S.p.A. | Elektromechanischer Linearantrieb zum Kippen der Fahrerkabine eines Nutzfahrzeuges |
DE19831940A1 (de) * | 1998-07-16 | 2000-01-20 | Alltec Gmbh | Verfahren zur Herstellung einer Gewindetriebmutter und Gewindetriebmutter |
DE102012014361A1 (de) * | 2012-07-20 | 2014-01-23 | Volkswagen Ag | Betätigungseinrichtung für einen Hauptbremszylinder eines Kraftfahrzeugs |
DE102013006795A1 (de) * | 2013-04-19 | 2014-10-23 | Volkswagen Aktiengesellschaft | Betätigungseinrichtung für eine Kraftfahrzeug-Bremsanlage |
DE102014101995A1 (de) * | 2014-02-18 | 2015-01-29 | Thyssenkrupp Presta Ag | Lenksäule für ein Kraftfahrzeug und Spindelmutter |
Also Published As
Publication number | Publication date |
---|---|
US20180257624A1 (en) | 2018-09-13 |
CN108025725A (zh) | 2018-05-11 |
DE102015217547A1 (de) | 2017-03-16 |
US10543825B2 (en) | 2020-01-28 |
JP2018526269A (ja) | 2018-09-13 |
CN108025725B (zh) | 2020-11-27 |
JP6568649B2 (ja) | 2019-08-28 |
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