WO2020229560A1 - Frein multidisques pour un élément tournant - Google Patents

Frein multidisques pour un élément tournant Download PDF

Info

Publication number
WO2020229560A1
WO2020229560A1 PCT/EP2020/063377 EP2020063377W WO2020229560A1 WO 2020229560 A1 WO2020229560 A1 WO 2020229560A1 EP 2020063377 W EP2020063377 W EP 2020063377W WO 2020229560 A1 WO2020229560 A1 WO 2020229560A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuating
disc
disc brake
basic structure
ramp
Prior art date
Application number
PCT/EP2020/063377
Other languages
German (de)
English (en)
Inventor
Uwe Bach
Matthias Schulitz
Adrian Messner
Thomas Stahl
Jens Hoffmann
Original Assignee
Continental Teves Ag & Co. Ohg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Teves Ag & Co. Ohg filed Critical Continental Teves Ag & Co. Ohg
Publication of WO2020229560A1 publication Critical patent/WO2020229560A1/fr

Links

Classifications

    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
    • F16D55/46—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member with self-tightening action
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
    • F16D55/26—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
    • F16D55/36—Brakes with a plurality of rotating discs all lying side by side
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/02—Fluid pressure
    • F16D2121/08—Fluid pressure acting on a membrane-type actuator, e.g. for gas pressure
    • F16D2121/10—Fluid pressure acting on a membrane-type actuator, e.g. for gas pressure for releasing a normally applied brake
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/36—Helical cams, Ball-rotating ramps

Definitions

  • the invention relates to a multi-disc brake with a basic division into at least one non-rotatably (vehicle-fixed) mounted component, and in at least one rotatably mounted component, comprising a receiving base structure (housing) for main discs, including intermediate discs that are in indirect cooperation with an actuating device via an actuating disc a preferred suitability and / or determination for a rotatably separately connected element, in particular for a drive shaft and / or drive axle which can also include cooperation and / or integration in / with further drive means of a drive train of a motor vehicle.
  • the invention relates to a multi-disc brake for a rotatable element.
  • the multi-disc brake has a basic structure which can be, for example, a housing of the multi-disc brake. Ty- Typically, the basic structure serves as a reference for radial or axial movements.
  • the multi-disc brake has a number of main discs, which are non-rotatably connected to the rotatable element and rotatable relative to the basic structure. As a result, rotational movements can be transmitted firmly between the rotatable element and the main disks, so that, for example, the main disks are driven by a rotational movement of the rotatable element and, when the main disks are braked, the rotatable element is also braked.
  • the multi-disc brake has a number of intermediate discs, which are each fixedly or rotatably mounted to a limited extent on the basic structure between the main discs. Fixedly mounted intermediate lamellae are therefore not rotatable relative to the basic structure, but are typically nevertheless axially displaceable.
  • the multi-disk brake has an actuating device which is configured to press the main disks against the intermediate disks in order to operate the multi-disk brake. As a result, friction can be achieved between the main disks and the intermediate disks, whereby the main disks and thus also the rotatable element are braked.
  • the actuating device has an actuating disc which is axially displaceable on the rotatable element and rotatable to a limited extent relative to the base structure.
  • the actuating device has an electromagnet, when energized, the actuating disc is rotated against the basic structure.
  • the actuating device has a number of ramps and a number of balls mounted in the ramps, with the balls moving the actuating disc axially against the lamellae when the actuating disc rotates by moving in the ramps.
  • a simple actuation device for a multi-disc brake can be implemented, which acts by means of an easily actuated electromagnet and a ball-ramp arrangement.
  • the actuating disc is pushed against the discs by its rotation and by the action of the balls, which actuates the multi-disc brake.
  • An axial displaceability of the actuating disk is understood to mean its basic mobility in the basic structure. As indicated, an axial movement is typically the result of a rotation of the actuating disc with consequent movement of the balls in the ramps.
  • a counter-disk connected to the rotatable element in a rotationally fixed manner comes into engagement with the actuating disk and rotates the actuating disk.
  • the counter disk can be mounted on the rotatable element in an axially movable manner and is moved against the actuating disk when the electromagnet is energized.
  • the counter disk basically has the rotary motion of the rotatable element and transmits this rotary motion when actuated to the actuating disk.
  • the rotatable element thus ultimately ensures the rotation of the actuating disk.
  • the actuating disc can be moved in particular by friction between the actuating disc and the counter disc.
  • the electromagnet can generate a direct rotary force for rotating the actuating disk with respect to the basic structure. This means that additional elements can be dispensed with.
  • the electromagnet can in particular be arranged in the actuating disk. Alternatively, the electromagnet can also be arranged in the basic structure or outside of it, for example.
  • the actuating disk can be connected to the basic structure via a pretensioning device which pretensions the actuating disk axially and / or with respect to rotation into a rest position.
  • the actuating disk can be reset and thus the multi-disc brake can be deactivated in the event that the electromagnet is no longer actuated, in which case the braking effect is typically no longer desired.
  • the actuating disk can in particular be designed as a yoke or have a yoke. This enables an advantageous guidance of a generated magnetic field.
  • the actuating disk can in particular be designed with a U-shaped cross section, with legs of the U pointing towards the slats.
  • a coil of an electromagnet can preferably be stored in a recess that is created as a result.
  • the ramp or ramps can be formed, for example, in the basic structure, in a ramp disc connected to the basic structure and / or in the actuating disc.
  • the balls, which run in the correspondingly designed ramps, are then typically arranged between the actuating disk and the basic structure.
  • the multi-disc brake can have at least one first ramp and one second ramp. Balls run in the first ramp when the actuating disk rotates in a first direction of rotation. In the second ramp, when the actuating disc rotates, balls run in a second ramp opposite to the first. set direction of rotation.
  • the first and second ramps can each also be pairs of ramps, so that, for example, respective ramps can be formed in the basic structure and in the actuating disk.
  • the multi-disc brake can be used in such a way that the actuating disc can be rotated in both directions of rotation, and the multi-disc brake is activated in each case.
  • This can be particularly advantageous if, as described above, a counter disk is used, since this acts differently on the actuating disk depending on the direction of rotation of the rotatable element.
  • the first ramp and the second ramp can have the same gradients. In this way, the actuating disc is pressed in the same way against the slats in the event of corresponding deflections in different directions of rotation. However, the first ramp and the second ramp can also have different gradients. As a result, a different characteristic of the multi-disc brake can be set for different directions of rotation, for example, for forward and reverse travel.
  • the basic structure can be a housing of the multi-disc brake. It typically serves to protect the multi-disc brake and surrounds other components.
  • the multi-disc brake can in particular have a shaft as a rotatable element.
  • This can be, for example, a typical drive shaft or a wheel shaft of a motor vehicle.
  • Fig. 1 shows a multi-disc brake 10 schematically according to an embodiment of the invention.
  • the multi-disc brake 10 has a basic structure 15 which serves as the housing of the multi-disc brake 10. It also has a rotatable element 17 in the form of a shaft which is rotatably connected to the base structure 15 via a bearing 18.
  • the multi-disc brake 10 has a number of discs 20. These are main lamellae 22, which are connected non-rotatably to the rotatable element 17, and intermediate lamellae 24, which are non-rotatably connected to the basic structure 15.
  • the disks 20 are separated from one another in a non-actuated state of the disk brake 10, so that no friction arises between them. However, if they are pressed against each other, friction occurs between them and the rotatable element 17 is braked in this way.
  • the slats 20 are arranged to be axially displaceable. The axis relevant for this corresponds to that of the rotatable element 17.
  • the multi-disc brake 10 has an actuating device 30. This serves to press the lamellae 20 against one another, as already mentioned, and thereby actuate the multi-disk brake 10 if this is desired.
  • the actuating device 30 has an actuating disk 32 which is axially movable and is mounted so that it can only rotate to a limited extent relative to the base structure 15.
  • a pretensioning device 70 is used, which in the present case is designed in the form of several springs. As a result, the actuation disc 32 is returned to a state of rest both axially and radially in a defined manner.
  • a contact element 33 is connected, which in the event of a displacement of the actuating disc 32 to the right comes into contact with the slats 20 and thus presses them against each other.
  • the actuation device 30 has an electromagnet 40. This is received in the actuating disk 32, the actuating disk 32 having a U-shape for this purpose with legs pointing in the direction of the slats 20.
  • the actuating device 30 also has a counter disk 50 which is connected to the rotatable element 17 in a rotationally fixed, but axially displaceable manner. If the electromagnet 40 is actuated, the counter disc 50 is pulled against the actuating disc 32, whereby a rotary movement of the rotatable element 17 can be partially transmitted to the actuating disc 32 by friction. The actuating disk 32 can thus be rotated, which is possible in both directions.
  • the actuating device 30 also has a ramp plate 60. In this ramps 65 are arranged. Correspondingly, ramps 35 are also arranged in the actuating disk 32. Balls 80 are mounted in the ramps 35, 65 and can run in the ramps 35, 65 when the actuating disk 32 rotates relative to the basic structure 15. By means of a correspondingly predetermined gradient of the respective ramps 35, 65, a rotation of the actuating disk 32 via the balls 80 can be converted into an axial movement of the actuating disk 32 to the right in this way. In order to actuate the multi-disc brake 10, the electromagnet 40 can thus be energized, which leads to the counter disk 50 being pulled against the actuating disk 32.
  • the actuating disk 32 can also be referred to as a ball-ramp disk.
  • the magnetic force can be increased so that the actuating force and the slope of the ramps 35, 65 result in an axial force for the braking force.
  • the slope can be smaller, since the angle of rotation can be selected to be significantly larger than the stroke of a motor-gear unit.
  • the corresponding connection of the Elekt romagneten 40 to the basic structure 15 is typically provided with appropriate elasticity, durability and the neces sary path.
  • a magnet for actuation can also be arranged, for example, in the basic structure 15 or outside. In this way, for example, a constant magnetic air gap can be achieved, which can possibly have a positive effect on controllability.
  • the actuating disk 32 or the contact element 33 can for example have an inserted friction lining, which can improve friction and / or abrasion.
  • These elements can also consist of different materials, for example magnetic sheet metal or material with similar positive properties for a high magnetic flux density in a yoke and gray cast iron or material with similar positive properties in the friction area to the lamellae 20 to optimize the wear properties.
  • electromagnet 40 As an alternative to only one electromagnet 40, several electromagnets or several windings can also be used, so that a certain redundancy is achieved.
  • a W-shape or E-shape of the actuating disk 32 can also be used in cross section.
  • a latching mechanism can be provided, which holds an actuated position of the actuating disk 32 without current and thus enables a parking brake effect.
  • a lever connection can also be provided radially outward, to which an electrically operated motor-gear unit, preferably with a brushed DC motor, and optionally with a red-red gear and self-locking spindle-nut gear is connected.
  • an electrically operated motor-gear unit preferably with a brushed DC motor, and optionally with a red-red gear and self-locking spindle-nut gear is connected.
  • This enables a parking brake function and additional redundancy is made possible by a total of two different actuation options.
  • the multi-disc brake 10 shown can run in liq fluid, for example in transmission oil, but can also run dry. Corresponding units can also be separated by seals so that there can be both dry and wet running areas.
  • the design described has proven to be inexpensive and robust against long service lives and corrosion / contamination.
  • the multi-disc brake 10 described thus has a high level of availability.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

L'invention concerne un frein multidisques (10) pour un élément tournant (17), ledit frein comprenant un dispositif d'actionnement (30) pourvu d'un électroaimant (50) et d'un disque d'actionnement (32) qui est apte à tourner et peut être déplacé axialement par l'intermédiaire d'un ensemble à rampes et billes.
PCT/EP2020/063377 2019-05-16 2020-05-13 Frein multidisques pour un élément tournant WO2020229560A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019207101.5A DE102019207101B4 (de) 2019-05-16 2019-05-16 Lamellenbremse für ein drehbares Element
DE102019207101.5 2019-05-16

Publications (1)

Publication Number Publication Date
WO2020229560A1 true WO2020229560A1 (fr) 2020-11-19

Family

ID=70975842

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/063377 WO2020229560A1 (fr) 2019-05-16 2020-05-13 Frein multidisques pour un élément tournant

Country Status (2)

Country Link
DE (1) DE102019207101B4 (fr)
WO (1) WO2020229560A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3313381A (en) 1964-07-02 1967-04-11 Borg Warner Electro-magnetic braking system
US4352415A (en) 1978-10-17 1982-10-05 Powell Ralph E Brakes
EP0822354A2 (fr) * 1996-07-22 1998-02-04 Eaton Corporation Frein d'inertie de transmission auto-renforcant
US5819883A (en) * 1996-03-01 1998-10-13 Eaton Corporation Driveline retarder with ball ramp loaded friction plates

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10056451A1 (de) 2000-11-14 2002-05-29 Bosch Gmbh Robert Scheibenbremse
DE102010045721A1 (de) 2010-09-16 2012-03-22 Magna Powertrain Ag & Co. Kg Drehmomentübertragungseinrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3313381A (en) 1964-07-02 1967-04-11 Borg Warner Electro-magnetic braking system
US4352415A (en) 1978-10-17 1982-10-05 Powell Ralph E Brakes
US5819883A (en) * 1996-03-01 1998-10-13 Eaton Corporation Driveline retarder with ball ramp loaded friction plates
EP0822354A2 (fr) * 1996-07-22 1998-02-04 Eaton Corporation Frein d'inertie de transmission auto-renforcant

Also Published As

Publication number Publication date
DE102019207101A1 (de) 2020-11-19
DE102019207101B4 (de) 2023-01-05

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