EP3947069A2 - Elektrische radantriebseinheit zum antrieb eines rades eines kraftfahrzeuges - Google Patents
Elektrische radantriebseinheit zum antrieb eines rades eines kraftfahrzeugesInfo
- Publication number
- EP3947069A2 EP3947069A2 EP20711041.2A EP20711041A EP3947069A2 EP 3947069 A2 EP3947069 A2 EP 3947069A2 EP 20711041 A EP20711041 A EP 20711041A EP 3947069 A2 EP3947069 A2 EP 3947069A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- braking
- fluid
- passage
- drive unit
- brake
- 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.)
- Withdrawn
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
- B60T13/10—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 fluid assistance, drive, or release
- B60T13/58—Combined or convertible systems
- B60T13/585—Combined or convertible systems comprising friction brakes and retarders
- B60T13/586—Combined or convertible systems comprising friction brakes and retarders the retarders being of the electric type
-
- 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
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D65/84—Features relating to cooling for disc brakes
- F16D65/847—Features relating to cooling for disc brakes with open cooling system, e.g. cooled by air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
-
- 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
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
-
- 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
- B60T5/00—Vehicle modifications to facilitate cooling of brakes
-
- 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
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
-
- 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
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
- F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
-
- 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
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/128—Discs; Drums for disc brakes characterised by means for cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/05—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/70—Gearings
- B60Y2400/74—Shaft brakes, e.g. input shaft brakes
-
- 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
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D2065/13—Parts or details of discs or drums
- F16D2065/1304—Structure
- F16D2065/1328—Structure internal cavities, e.g. cooling channels
-
- 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
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D2065/13—Parts or details of discs or drums
- F16D2065/1304—Structure
- F16D2065/1332—Structure external ribs, e.g. for cooling or reinforcement
Definitions
- Electric wheel drive unit for driving a wheel of a motor vehicle
- the invention relates to an electric wheel drive unit for driving a wheel of a motor vehicle.
- thermal endurance is a focus when developing a brake.
- the brake disc or drum
- the brake disc is cooled by the flow of air that is created when the vehicle is in motion.
- an electric wheel drive unit for driving a wheel of a motor vehicle which ensures air cooling of a braking device, is preferably inexpensive and easy to adjust or assemble and preferably can be arranged in the available space to save space.
- an electric wheel drive unit for driving a wheel of a motor vehicle comprises:
- a housing which accommodates the braking device in its interior.
- the housing favorably completely encloses the braking device.
- the braking device is thus enclosed within the housing.
- the braking device is preferably designed to convert kinetic energy into heat in order to brake and to suck in a fluid in the axial direction and in to promote the radial direction in order to cool the braking device by a largely radially directed fluid flow which flows through the braking device.
- a radially oriented fluid flow can also include an axially oriented flow component in addition to the radially oriented flow component.
- the proportion of the axially aligned component in the total fluid flow is preferably a maximum of 10%.
- the braking device is designed to convey a fluid in the axial direction in order to cool the braking device by means of a further fluid flow which flows along the outside of the braking device.
- the housing is designed to guide the axial fluid flow outside along the braking device.
- the braking device advantageously has a first braking element for converting kinetic energy into heat.
- the first brake element is radially outwardly attached to a third Bremsele element, in particular designed as an outer disk carrier.
- first braking element can be rotated relative to the housing.
- the first brake element is designed as a brake disk and preferably as an impeller of a centrifugal pump.
- the first braking element can simultaneously fulfill two tasks, namely a braking task and a conveying task. It is thus possible for the first brake element to give off heat by actively conveying a fluid flow through the first brake element.
- the first braking element comprises at least one passage in the radial direction. This passage serves to establish a flow of fluid that flows through the first braking element.
- the first braking element can thus be actively cooled.
- the first braking element has various passages which are at regular intervals from one another or equally spaced from one another in the circumferential direction. Active cooling can thus be improved.
- the at least one passage of the first braking element advantageously has a fluid inlet opening and a fluid outlet opening, between which a fluid flows when the braking device is in operation.
- the fluid inlet opening is arranged radially inward in comparison to the fluid outlet opening.
- the area of the fluid inlet opening is made smaller than the area of the fluid outlet opening.
- the fluid outlet opening is adapted, in particular geometrically adapted, to a second passage of a third braking element.
- the fluid inlet opening is favorably adapted to a first passage of a second brake element, in particular adapted geometrically.
- geometrically adapted is preferably understood to mean that one component / element / opening is adapted to the other component / element / opening in terms of shape and / or size.
- the at least one passage is preferably designed conically, with the at least one passage preferably being designed as a truncated cone from radially outside to radially inside, which tapers radially inwards towards a theoretical cone tip.
- the at least one passage is inclined in the axial direction.
- the at least one passage preferably encloses an angle between 5 and 25 degrees, more preferably an angle of 15 degrees, to a perpendicular that is oriented perpendicular to a straight line that extends in the axial direction.
- a fluid flow can be generated through the first braking element, which flows for the most part in the radial direction and preferably has an axially aligned component of a maximum of 10% of the total fluid flow. Due to the inclined design, the outflow of fluid can be facilitated, without this accumulating radially on the outside with a mere radial alignment of the at least one passage.
- the at least one passage is advantageously L-shaped in cross section in the axial direction.
- the tip of the long leg of the L-shaped design forms a fluid inlet opening on the side facing away from the short leg of the L-shaped design.
- the short leg of the L-shaped design extends away in the direction from the long leg of the L-shaped design, which preferably corresponds to the conveying direction of a fluid to be conveyed.
- the braking device preferably has a second braking element.
- the second brake element has at least one first passage in the radial direction. Fluid can flow through this in order to ensure cooling for the braking device.
- the second braking element preferably has various first passages, which are spaced at regular intervals from one another or equally spaced from one another in the circumferential direction. In this way, even heat dissipation can be guaranteed.
- the at least one first passage advantageously has an area for a fluid to flow through which is adapted to a fluid inlet opening of the first brake element, in particular adapted geometrically.
- the at least one first passage and a fluid inlet opening of the first braking element are aligned in one state. In this way, a fluid stream or a fluid can flow through the at least one first passage and the fluid inlet opening.
- the second braking element preferably has at least one first Axialpassa ge in the axial direction. Fluid can also flow through the at least one first axial passage in order to ensure cooling for the braking device. Furthermore, it is preferred that the second braking element has various first axial passages which are at regular intervals from one another or equally spaced from one another in the circumferential direction. In this way, a uniform fluid flow can be realized in the axial direction.
- the second braking element is preferably not rotatable relative to the housing.
- the second braking element is preferably rigidly connected to the housing.
- the second brake element comprises a disk carrier, in particular an inner disk carrier.
- the second braking element comprises a counter-pressure element. Lamellae of a lamellar carrier can be pressed against the counter-pressure element.
- the disk carrier of the second braking element is advantageously attached to the counterpressure element.
- the at least one first axial passage extends in the axial direction through the disk carrier and through the counter-pressure element.
- a fluid flow can pass through the inner disk carrier and the counter-pressure element.
- a friction lining is preferably arranged between the lamellae of the lamellar carrier and the counterpressure element. With this, the friction or a coefficient of friction between the two components mentioned can be set.
- the at least one first axial passage is preferably adapted to at least one second axial passage of a third braking element, in particular is geometrically adapted.
- a fluid flow can pass through or flow through all axial passages.
- the braking device has a third braking element.
- the third braking element has at least one second passage in the radial direction. It is thus possible for a fluid flow to flow through the third brake element in the radial direction.
- the third braking element advantageously has various second passages, which are spaced apart at regular intervals in the circumferential direction or are equally spaced apart from one another. This ensures continuous and even cooling.
- the at least one second passage has an area for a fluid to flow through which is adapted, in particular geometrically, to a fluid outlet opening of the first braking element.
- the flow behavior can thus be adapted and improved.
- first braking element and the third braking element are fastened to one another in such a way that the at least one second passage and the fluid outlet opening of the at least one passage are in alignment in order to ensure a rapid flow of fluid.
- the braking device has a third braking element.
- the third braking element preferably has at least one second Axialpassa ge in the axial direction. In this way, a fluid stream can also flow through the third braking element in the axial direction.
- the third braking element preferably has various second axial passages which are spaced apart at regular intervals or at the same distance from one another in the circumferential direction. A uniform and continuous flow of fluid can thus be generated in the axial direction.
- the at least one second axial passage is adapted to at least one first axial passage of a second braking element, in particular is adapted geometrically. This design ensures that a fluid flow can flow through several elements or components.
- the at least one second axial passage and the at least one first axial passage are advantageously aligned in one state. In this state, fluid can flow through both axial passages.
- the third braking element prefferably be rotatable relative to the housing.
- the third brake element is designed as a disk carrier, in particular as an outer disk carrier.
- the electric wheel drive unit advantageously has a wheel carrier element to which the braking device is partially connected.
- the first braking element of the braking device in particular the inner disc carrier and / or the counter-pressure element, is connected to the Radträ gerelement, preferably in a form-fitting manner. In this way, forces can be transmitted in a simple, safe and loss-free manner.
- the wheel carrier element cannot be rotated relative to the housing and / or the first brake element is connected to the wheel carrier element, in particular directly.
- first, second and third brake elements are aligned with one another in such a way that forces can be transmitted between the brake elements. A braking effect can thus be brought about.
- the braking device comprises a pressure element which can be brought into operative connection with the first braking element. Active activation of the braking device is possible with the aid of the pressure element.
- a friction lining is preferably arranged between the pressure element and the disk carrier of the first braking element. With this, the friction or the coefficient of friction between the components mentioned can be adjusted.
- the pressure element is arranged and designed in such a way that a force can be exerted on the disk carrier of the second brake element, so that a relative rotation of the third brake element designed as a disk carrier with respect to the disk carrier of the second brake element can be prevented.
- a braking process is described here in which the relative speed of the second and third braking elements are adjusted to one another.
- the first brake element can be brought into contact with the second brake element and with the third brake element and can be released from one another.
- the pressure element can be arranged indirectly and sealingly on the first brake element, so that preferably when the pressure element is shifted in the axial direction and in the direction of the first brake element in an interior space between Pressure element and first braking element, the evasive options for a flow of the fluid or for air that is promoted from the inside to the radially outward selement through the first Brem, can be limited.
- the suction effect of the rotating first braking element with its at least one passage can be increased.
- a more stable negative pressure between the first braking element and the pressure element can be achieved by the sealing contact of the pressure element, whereby an air flow with a high cooling effect can be generated.
- an interior space is formed between the pressure element, the first brake element and the second brake element, the tightness of which can be increased by shifting the pressure element, in particular in the direction of the first brake element, so that there are opportunities for a flowing fluid or for air that is conveyed through the first brake element from the inside to the outside radially, can be limited. It is thus possible to increase the suction effect of the rotating first brake element with its at least one passage in order to ensure a more stable negative pressure between the first brake element, the pressure element and the second brake element. This also makes it possible to achieve an improved flow through the at least one passage, and thus an air flow with a high cooling effect can be generated.
- the sealing contact of the pressure element on the first brake element, with a friction lining being able to be arranged in between, is preferably ensured or implemented when generating a braking force or preferably only when generating a braking force.
- the pressure element preferably moves in the direction of the first braking element in order to generate a braking force.
- first and third brake elements with which a wheel can be connected, can be rotated relative to the housing and to the second brake element.
- the housing it is advantageous if it has at least one axial opening in order to suck in fluid.
- the housing advantageously has at least one radial opening in order to dispense fluid that has been sucked in. Furthermore, it is advantageous if the radial opening is offset axially with respect to the braking device, so that fluid that is sucked in must flow past the braking device in the axial direction.
- the housing is designed to guide the axial fluid flow through the axial openings along the outside of the braking device.
- the axial fluid flow guided outside the braking device can also add an axial velocity component to the radially conveyed fluid flow, which has absorbed a significantly larger amount of heat when cooling the braking device. As a result, the warm fluid can be quickly transported radially outside the braking device, so that no heat build-up can occur.
- the braking device comprises a suction side and a pressure side, where with preferably the suction side is arranged radially inward and in comparison, the pressure side ra dial outside and preferably also axially outside.
- This idea preferably consists - in simplified form - of generating active air cooling of a braking device or a brake disc in an electric wheel drive unit or in a so-called e-wheel.
- a negative pressure area is preferably generated in the interior of an inner disk carrier or a second brake element in order to suck in cool air from the outside.
- This cool air is then preferably conveyed through the brake disc or through the first brake element and between an outer disk carrier / a third brake element and a housing of the electric wheel drive unit in order to cool it.
- the air mentioned is preferably conveyed out through openings or radial openings in the housing (negative pressure inside, positive pressure outside).
- the present invention preferably makes use of the so-called centrifugal pump effect.
- at least one channel or at least one passage is advantageously arranged in the brake disc or in the first brake element, which is preferably mounted on the rotating thoroughlylamellenträ ger / the third brake element, so that centrifugal forces allow the air to flow inwards from the inside can be promoted externally.
- the inner plate carrier or the second brake element is advantageously designed radially with openings or with various first passages so that the air can flow through (can also be added to the outer plate carrier).
- a pressure pot is advantageously used to separate both rooms (negative pressure & positive pressure) from one another.
- FIG. 2 shows a three-dimensional view of the wheel drive unit from FIG.
- FIG. 3 shows the same view as in FIG. 1, but without reference characters for it with arrows to show the fluid flow.
- FIG. 1 shows a sectional view of an electric wheel drive unit 1 according to the invention
- FIG. 2 showing a three-dimensional view of the wheel drive unit 1 from FIG. 1 with arrows to illustrate the fluid flow
- FIG. 3 shows the same view as in FIG. 1, but without reference characters for it with arrows to illustrate the fluid flow.
- an electric wheel drive unit 1 for driving a wheel of a motor vehicle has a braking device 2 for braking the electric wheel drive unit 1 during operation.
- the wheel drive unit 1 has a housing 3, which receives the braking device 2 in its interior I.
- the braking device 2 is designed to convert kinetic energy into heat in order to brake, and to suck in a fluid in the axial direction A and to convey it in the radial direction R in order to drive the braking device 2 through a largely radially directed fluid flow that flows through the braking device 2 flows through it to cool len (see. Figure 3).
- the braking device 2 is designed to convey a fluid in the axial direction A in order to cool the braking device 2 by means of a further fluid flow which flows along the outside of the braking device 2 (see FIG. 3).
- the housing 3 is designed to guide the axial fluid flow along the outside of the braking device 2.
- the braking device 2 has a first braking element 4, a second braking element 5 and a third braking element 6.
- the first braking element 4 is used to convert kinetic energy into heat, it being attached radially on the outside of the third braking element 6, designed as an outer disc carrier.
- the first brake element 4 is designed as a brake disk and as an impeller of a centrifugal pump, so that the brake device 2 has a suction side and a pressure side.
- the suction side is arranged radially on the inside and, in comparison, the pressure side is arranged radially on the outside (see FIG. 3).
- the first braking element 4 has di verse passages 7 in the radial direction R, which are spaced apart from one another in the circumferential direction U at regular intervals.
- Each passage 7 has a fluid inlet opening 8 and a fluid outlet opening 9, between which a fluid flows when the braking device 2 is in operation. This is because the rotation of the first braking element 4 causes a fluid within the passages 7 to experience a centrifugal force, as a result of which the fluid is conveyed or flows from the inside to the outside.
- the figures show that the fluid inlet opening 8 is arranged radially inward compared to the fluid outlet opening 9, the area of the fluid inlet opening 8 being smaller than the area of the fluid outlet opening 9.
- the suction effect can be improved in one way.
- Each fluid outlet opening 9 is geometrically adapted to second passages 15 of the third brake element 6 and each fluid input opening 8 to first passages 10 of the second brake element 5, i.e. in terms of size and shape.
- a passage or each passage 7 is conical and is designed as a truncated cone from radially outside to radially inside, which tapers radially inwards towards a theoretical cone apex.
- the passage 7 shown by way of example is also inclined in the axial direction A, where the passage 7 encloses an angle of 15 degrees to a perpendicular that is oriented perpendicular to a straight line that extends in the axial direction A.
- FIG. 1 shows that the passage 7 is L-shaped in cross section in the axial direction A, the short leg of the L-shaped design having a fluid outlet opening 9 and the tip of the long leg of the L-shaped design on the side which facing away from the short leg of the L-shaped configuration, a fluid inlet opening 8 forms.
- the short leg of the L-shaped design extends in the direction away from the long leg of the L-shaped design, which corresponds to the conveying direction of a fluid to be conveyed (compare in particular FIG. 3 with an exemplary illustration of a fluid flow through the electric wheel drive unit 1 ).
- the braking device 2 has a second braking element 5 which has various first passages 10 which are spaced apart from one another in the circumferential direction U at regular intervals.
- Each passage 10 has an area for a fluid to flow through which is geometrically adapted to the fluid inlet opening 8 of the first braking element 4.
- a first passage 10 and a fluid inlet opening 8 of the first braking element 4 are aligned. In this way, a fluid flow can flow from the first passage 10 to the fluid inlet opening 8.
- the second brake element 5 has various first axial passages 11 which are spaced apart from one another in the circumferential direction U at regular intervals.
- the second braking element 5 is composed of an inner disk carrier 12 and a counter-pressure element 13, the disk carrier 12 being attached to the counter-pressure element 13.
- the counter-pressure element 13 is used to give slats a stop against which they can be moved.
- the first axial passage 11 extends in the axial direction A through the lamella carrier 12 and through the counter-pressure element 13.
- a friction lining 14 is arranged with which the friction or the coefficient of friction between the elements mentioned can be adjusted in a targeted manner.
- first axial passage 11 is geometrically adapted to a second axial passage 16 of the third brake element 6, i.e. in terms of size and shape.
- the braking device 2 has a third braking element 6, which has various second passages 15 which are spaced from one another in the circumferential direction U at regular intervals.
- every second passage 15 has an area for a fluid to flow through which is geometrically adapted to the fluid outlet opening 10 of the first braking element 4, that is to say in terms of shape and size.
- FIG. 2 shows that the first braking element 4 and the third braking element 6 are fastened to one another in such a way that every second passage 15 and every fluid outlet opening 9 are aligned in order to ensure that fluid can flow through. Furthermore, the third brake element 6 has various second axial passages 16 which are spaced apart from one another in the circumferential direction U at regular intervals.
- every second axial passage 16 is geometrically adapted to every first axial passage 11 of the second braking element 5 in terms of size and shape in order to ensure a continuous flow of fluid as best as possible.
- the third brake element 6 is designed as an outer disk carrier.
- the electric wheel drive unit 1 has a Radträ gerelement 19, to which the braking device 2 is partially connected, the inner disc carrier 12 and the counter-pressure element 13 are positively connected to the Radaniiele element 19.
- first and third brake elements 4, 6 are rotatable relative to the housing 3, the second brake element 5 and the wheel carrier element 19 are not rotatable relative to the housing 3, the second brake element 5 being directly connected to the wheel carrier element 19.
- Figures 1 and 3 also show that the first, second and third brake elements 4, 5, 6 are aligned with one another in such a way that forces between the brake elements 4, 5,
- FIG. 1 shows that the braking device 2 comprises a pressure element 17 which can be brought into operative connection with the second braking element 5, a friction lining 18 being arranged between the pressure element 17 and the disk carrier 12 of the second braking element 5.
- the friction lining With the friction lining, the friction between the named elements can be adjusted in a targeted manner.
- the pressure element 17 is also arranged and designed in such a way that a force can be exerted on the disks of the second and third brake elements 5, 6 so that a relative rotation of the third brake element 6, designed as a disk carrier, with respect to the disk carrier 12 of the second brake element 5 can be prevented.
- a slave device 20 in particular a slave cylinder 20
- the first brake element 4 can be brought into contact with the second brake element 5 and with the third brake element 6 and can be released from one another.
- the pressure element 17 is arranged indirectly and sealingly on the first braking element 4, so that when the pressure element 17 is displaced in the axial direction A and in the direction of the first braking element 4 in an interior space between the pressure element 17 and the first braking element 4, there is a possibility of evasion for a flowing fluid or for air that is promoted from the inside to the radially outside through the first brake element ge are limited. In this way, the suction effect of the rotating first braking element 4 with its passages 7 can be increased.
- a more stable vacuum between the first braking element 4 and the pressure element 17 can be achieved by the sealing engagement of the Druckele element 17, whereby an air flow with a high cooling effect can be generated.
- the sealing contact of the pressure element 4 on the first braking element 4, with the friction lining 18 also being arranged in between (see FIG. 1), is preferably only ensured or implemented when a braking force is generated.
- an interior space is formed between the pressure element 17, the first braking element 4 and the second braking element 5, the tightness of which can be increased by shifting the pressure element 4, in particular in the direction of the first braking element 4, so that there are opportunities for a flowing fluid or for Limited air.
- the housing 3 In order to suck in fluid, as FIG. 2 shows, the housing 3 has various axial openings 21, and in order to discharge fluid, the housing 3 has various radial openings 22, the radial openings 22 being axially offset from the braking device 2, so that the fluid sucked in in the axial direction A. the braking device 2 must flow past (see FIG. 3). Furthermore, the figures show that the wheel drive unit 1 has a shaft 23 to which the braking device 2 is partially connected, the third braking element 6 of the braking device 2 being positively and / or non-positively connected to the shaft 22.
- the shaft 23 is rotatable relative to the housing 3 and to the second braking element 5, a drive unit, in particular an electric motor (not shown), being attachable to the shaft 23.
- Figures 1 and 3 also show that a bearing unit 24 is arranged between the shaft 23 and the housing 3, so that these two can be rotated relative to one another. Finally, it should be mentioned that the housing 3 can be fixedly attached to a vehicle frame.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Braking Arrangements (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019107740.0A DE102019107740A1 (de) | 2019-03-26 | 2019-03-26 | Elektrische Radantriebseinheit zum Antrieb eines Rades eines Kraftfahrzeuges |
| PCT/DE2020/100135 WO2020192820A2 (de) | 2019-03-26 | 2020-02-26 | Elektrische radantriebseinheit zum antrieb eines rades eines kraftfahrzeuges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3947069A2 true EP3947069A2 (de) | 2022-02-09 |
Family
ID=69810501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20711041.2A Withdrawn EP3947069A2 (de) | 2019-03-26 | 2020-02-26 | Elektrische radantriebseinheit zum antrieb eines rades eines kraftfahrzeuges |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20220145954A1 (de) |
| EP (1) | EP3947069A2 (de) |
| JP (1) | JP2022527158A (de) |
| CN (1) | CN113518728A (de) |
| DE (1) | DE102019107740A1 (de) |
| WO (1) | WO2020192820A2 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4644722A1 (de) * | 2024-04-30 | 2025-11-05 | Brembo SGL Carbon Ceramic Brakes S.p.A. | Bremsscheibe |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57126749A (en) * | 1981-01-24 | 1982-08-06 | Honda Motor Co Ltd | Disk brake system for motorbicycle |
| DE8417138U1 (de) * | 1984-06-05 | 1984-09-20 | Lucas Industries P.L.C., Birmingham, West Midlands | Radbaugruppe mit scheibenbremse fuer fahrzeuge |
| JP2706685B2 (ja) * | 1992-09-29 | 1998-01-28 | 東海旅客鉄道株式会社 | 多板ディスクブレーキ装置 |
| JP3521266B2 (ja) * | 1994-09-08 | 2004-04-19 | 株式会社豊田中央研究所 | ブレーキディスクロータ |
| JP2001509236A (ja) * | 1996-12-31 | 2001-07-10 | イヴォン ランコート | 改良したディスクブレーキ組立体 |
| CN1208704A (zh) * | 1998-06-29 | 1999-02-24 | 深圳市外贸通达实业股份有限公司 | 全盘制动方法及其装置 |
| US6422358B2 (en) * | 2000-01-24 | 2002-07-23 | William T. Deibel | Ventilated disc brake rotor |
| JP2004260902A (ja) * | 2003-02-25 | 2004-09-16 | Kokusan Denki Co Ltd | 磁石発電機 |
| JP4391884B2 (ja) * | 2004-05-26 | 2009-12-24 | 本田技研工業株式会社 | 車両用ホイール駆動装置 |
| JP4450208B2 (ja) * | 2005-01-19 | 2010-04-14 | 三菱自動車工業株式会社 | インホイールモータ |
| JP5110854B2 (ja) * | 2006-11-17 | 2012-12-26 | Ntn株式会社 | インホイール型モータ内蔵センサ付き車輪用軸受装置 |
| US8336682B2 (en) * | 2007-08-31 | 2012-12-25 | Honda Motor Co., Ltd. | Ventilated brake disk and method |
| GB2479898B (en) * | 2010-04-28 | 2012-10-10 | Protean Electric Ltd | An electric motor brake system |
| CN103448531B (zh) * | 2013-08-15 | 2015-04-15 | 安徽工程大学 | 一种具有冷却功能的电动驱动轮 |
| US9739326B2 (en) * | 2013-10-22 | 2017-08-22 | Bell Helicopter Textron Inc. | Rotor brake with integrated impeller |
| DE102013223668A1 (de) * | 2013-11-20 | 2015-05-21 | Bayerische Motoren Werke Aktiengesellschaft | Kühlluftführung für eine Reibbelagbremse eines Kraftfahrzeugs |
| CN105703540B (zh) * | 2014-11-24 | 2020-09-01 | 舍弗勒技术有限两合公司 | 一种液冷型轮毂电机及机动车 |
| US10197122B2 (en) * | 2016-04-07 | 2019-02-05 | Bendix Spicer Foundation Brake Llc | Brake disc with coning-compensating arrangement |
| CN108839513B (zh) * | 2018-06-28 | 2020-10-09 | 安徽江淮汽车集团股份有限公司 | 轮毂结构 |
-
2019
- 2019-03-26 DE DE102019107740.0A patent/DE102019107740A1/de not_active Withdrawn
-
2020
- 2020-02-26 US US17/598,388 patent/US20220145954A1/en not_active Abandoned
- 2020-02-26 CN CN202080017566.9A patent/CN113518728A/zh active Pending
- 2020-02-26 JP JP2021557141A patent/JP2022527158A/ja not_active Ceased
- 2020-02-26 WO PCT/DE2020/100135 patent/WO2020192820A2/de not_active Ceased
- 2020-02-26 EP EP20711041.2A patent/EP3947069A2/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US20220145954A1 (en) | 2022-05-12 |
| WO2020192820A2 (de) | 2020-10-01 |
| WO2020192820A3 (de) | 2020-11-19 |
| CN113518728A (zh) | 2021-10-19 |
| DE102019107740A1 (de) | 2020-10-01 |
| JP2022527158A (ja) | 2022-05-31 |
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